This document provides an overview of week 1 topics on physical and thermal waste processing. It introduces the learning objectives, references, and various waste processing methods including physical, chemical, thermal, and biological. Specifically, it discusses size reduction, separation, compaction, and other physical processing techniques. It also explains thermal processing methods like combustion, pyrolysis, gasification and their chemical transformations. Proximate analysis, fusing point, ultimate analysis and energy content testing for thermal waste treatment are outlined.
Experimental Study of CO2 Gasification of Biomethanation WasteIJERA Editor
Gasification is one of prominent thermochemical processes generally used to convert organic feedstock to combustible syngas (CO and H2). An experimental study of biomass gasification using carbon dioxide as an gasifying medium was carried out in a fixed bed gasifier. The main aim of this study was to determine the effect of temperature on the output syngas. The present study reported the results for producing syngas with CO2 as gasification agent and biomass (rice husk and bio-methanation waste) as raw material. The gasification was performed at 700-900°C respectively and CO2 flow rate was maintained at 0.5 lpm. Maximum syngas production found at high temperature (900°C). The syngas analysis showed higher hydrogen yield at higher temperatures.
Production of methane from members of animal’s body using sanitary landfill Zhyar Arsalan
This document discusses the production of methane from organic waste using an aerobic digestion process. It outlines the background, objectives, scope and methods used in the study. The key points are:
1) The study aims to produce methane from animal body waste and soil using a glass pack system and measure gas pressure.
2) Methane is produced through the aerobic digestion of biologically degradable organic matter in landfills by aerobic bacteria.
3) Two glass packs were used in the experiment and produced different levels of methane gas pressure, showing the process works but may be improved.
This document summarizes a study that assessed and compared the combustion and pollution potentials of Premium Motor Spirit (PMS) and Automotive Gas Oil (AGO). Samples of PMS and AGO were combusted in a specially designed combustion chamber. The particulate matter and combustion effluents were collected and analyzed. PMS yielded 1.9g/l of particulate matter while AGO yielded 2.7g/l. The particulates and residues were extracted and analyzed using gas chromatography. The chromatograms showed evidence of polyaromatic hydrocarbons, indicating the combustion of these fuels generates pollutants. PMS burned faster than AGO due to its lower molecular weight and volatility. Incomplete combustion was observed for both fuels
This document summarizes a study on the accumulation of metals during thermal processing of sewage sludge. Fly ash and air pollution control (APC) residues were produced during sewage sludge incineration and were characterized. Metals were unevenly distributed between the fly ash and APC residues depending on their melting temperatures. Elements with higher melting temperatures concentrated more in the fly ash, while those with lower melting points volatilized and concentrated more in the APC residues. Overall metal concentrations were elevated in both waste streams compared to natural levels, but were too low to consider recovering the metals.
Effect of Fractionation and Pyrolysis on Fuel Properties of Poultry LitterLPE Learning Center
The document summarizes research on the effect of fractionation and pyrolysis on the fuel properties of poultry litter. Key findings include:
- Pyrolyzing the coarse fraction of poultry litter at 300°C captured the most energy (68.71%) in the charcoal produced and resulted in the highest calorific value (17.39 MJ/kg).
- Pyrolysis above 500°C captured less carbon but produced a light condensate fraction that could be used as a low-grade liquid fuel.
- The medium condensate fraction captured 27.54% of nitrogen and could be used as fertilizer.
- Pyrolysis significantly reduced nutrients like ammonium
1) The Radox catalyst was significantly more effective than chlorine dioxide at reducing malodorous volatile organic compounds (VOCs) from poultry rendering waste gas. Samples treated with Radox had 42% more carbon dioxide and 69% lower aldehydes compared to untreated or chlorine dioxide treated samples.
2) Gas chromatography-olfactometry identified five aldehydes responsible for over half of odor intensity in untreated samples. The Radox catalyst converted these malodorous aldehydes to less odorous organic acids.
3) Fifteen air samples were analyzed and grouped. Samples treated with just Radox or Radox plus chlorine dioxide had similar VOC profiles and lower VOC levels compared to untreated or chlor
Utilization of biodiesel wastes as a bioresource for the preparation of activ...Sak Taff James
This study examined the use of palm shells and Jatropha curcas fruit shells as raw materials for producing activated carbon. The effects of hydrofluoric acid treatment, impregnation ratio, activation temperature, and activation time on the adsorption capacity of the activated carbons were investigated. Hydrofluoric acid treatment improved adsorption capacity by removing ash residues from the raw materials. Maximum adsorption capacities were achieved with an activation temperature of 700°C, activation time of 1 hour, and impregnation ratio of 1:1. Jatropha curcas shells produced activated carbon with the highest adsorption capacities of 257.07 mg/g for methylene blue and 847.58 mg/g for iodine. Overall
Experimental Study of CO2 Gasification of Biomethanation WasteIJERA Editor
Gasification is one of prominent thermochemical processes generally used to convert organic feedstock to combustible syngas (CO and H2). An experimental study of biomass gasification using carbon dioxide as an gasifying medium was carried out in a fixed bed gasifier. The main aim of this study was to determine the effect of temperature on the output syngas. The present study reported the results for producing syngas with CO2 as gasification agent and biomass (rice husk and bio-methanation waste) as raw material. The gasification was performed at 700-900°C respectively and CO2 flow rate was maintained at 0.5 lpm. Maximum syngas production found at high temperature (900°C). The syngas analysis showed higher hydrogen yield at higher temperatures.
Production of methane from members of animal’s body using sanitary landfill Zhyar Arsalan
This document discusses the production of methane from organic waste using an aerobic digestion process. It outlines the background, objectives, scope and methods used in the study. The key points are:
1) The study aims to produce methane from animal body waste and soil using a glass pack system and measure gas pressure.
2) Methane is produced through the aerobic digestion of biologically degradable organic matter in landfills by aerobic bacteria.
3) Two glass packs were used in the experiment and produced different levels of methane gas pressure, showing the process works but may be improved.
This document summarizes a study that assessed and compared the combustion and pollution potentials of Premium Motor Spirit (PMS) and Automotive Gas Oil (AGO). Samples of PMS and AGO were combusted in a specially designed combustion chamber. The particulate matter and combustion effluents were collected and analyzed. PMS yielded 1.9g/l of particulate matter while AGO yielded 2.7g/l. The particulates and residues were extracted and analyzed using gas chromatography. The chromatograms showed evidence of polyaromatic hydrocarbons, indicating the combustion of these fuels generates pollutants. PMS burned faster than AGO due to its lower molecular weight and volatility. Incomplete combustion was observed for both fuels
This document summarizes a study on the accumulation of metals during thermal processing of sewage sludge. Fly ash and air pollution control (APC) residues were produced during sewage sludge incineration and were characterized. Metals were unevenly distributed between the fly ash and APC residues depending on their melting temperatures. Elements with higher melting temperatures concentrated more in the fly ash, while those with lower melting points volatilized and concentrated more in the APC residues. Overall metal concentrations were elevated in both waste streams compared to natural levels, but were too low to consider recovering the metals.
Effect of Fractionation and Pyrolysis on Fuel Properties of Poultry LitterLPE Learning Center
The document summarizes research on the effect of fractionation and pyrolysis on the fuel properties of poultry litter. Key findings include:
- Pyrolyzing the coarse fraction of poultry litter at 300°C captured the most energy (68.71%) in the charcoal produced and resulted in the highest calorific value (17.39 MJ/kg).
- Pyrolysis above 500°C captured less carbon but produced a light condensate fraction that could be used as a low-grade liquid fuel.
- The medium condensate fraction captured 27.54% of nitrogen and could be used as fertilizer.
- Pyrolysis significantly reduced nutrients like ammonium
1) The Radox catalyst was significantly more effective than chlorine dioxide at reducing malodorous volatile organic compounds (VOCs) from poultry rendering waste gas. Samples treated with Radox had 42% more carbon dioxide and 69% lower aldehydes compared to untreated or chlorine dioxide treated samples.
2) Gas chromatography-olfactometry identified five aldehydes responsible for over half of odor intensity in untreated samples. The Radox catalyst converted these malodorous aldehydes to less odorous organic acids.
3) Fifteen air samples were analyzed and grouped. Samples treated with just Radox or Radox plus chlorine dioxide had similar VOC profiles and lower VOC levels compared to untreated or chlor
Utilization of biodiesel wastes as a bioresource for the preparation of activ...Sak Taff James
This study examined the use of palm shells and Jatropha curcas fruit shells as raw materials for producing activated carbon. The effects of hydrofluoric acid treatment, impregnation ratio, activation temperature, and activation time on the adsorption capacity of the activated carbons were investigated. Hydrofluoric acid treatment improved adsorption capacity by removing ash residues from the raw materials. Maximum adsorption capacities were achieved with an activation temperature of 700°C, activation time of 1 hour, and impregnation ratio of 1:1. Jatropha curcas shells produced activated carbon with the highest adsorption capacities of 257.07 mg/g for methylene blue and 847.58 mg/g for iodine. Overall
Gasification Performance Improvement of Treated SRF Residue by Using Minerals...Md Tanvir Alam
The document discusses gasification performance of treated solid refuse fuel (TSRF) residue. Key findings include:
1) TSRF gasification produced syngas mainly of H2, CO, CO2 and CH4. Maximum syngas yield and heating value occurred at an equivalence ratio of 0.2.
2) Adding minerals like dolomite or lime to the gasification bed increased syngas component yields and lowered tar. Dolomite addition yielded the highest syngas.
3) Co-gasifying TSRF with 25% biomass waste increased syngas component and heating values the most. Using a 25% biomass and dolomite blend yielded the highest
This document examines energy recovery from mixed paper waste through combustion. It discusses that paper waste makes up a large portion of municipal solid waste and has benefits as an energy source such as being free of contaminants, having a high heating value, and producing low emissions. The document then explores emissions from combusting paper waste and various control methods. It outlines an experimental study to determine the calorific value of different paper types and calculate the energy value of mixed paper waste samples. The goal is to estimate the energy potential from known compositions of mixed paper.
This document summarizes a study that measured carbonaceous aerosol concentrations at an urban residential site in Agra, India from May to August 2011. The key findings include:
1) The average concentration of PM2.5 was 55.3±17.4 μg/m3, within prescribed limits. Organic carbon varied from 7.6 to 37.5 μg/m3 with an average of 18.2±6.4 μg/m3. Elemental carbon ranged from 1.2 to 9.4 μg/m3 with an average of 3.2±1.6 μg/m3.
2) Total carbonaceous aerosols accounted for 64.9%
Preparation and Characterization of Activated Carbon from Hura Crepitans Linn...theijes
Activated carbons were thermally prepared from Hura Crepitan L. seed shells. Zinc chloride (ZnCl2) and Phosphoric acid (H3PO4) were separately used as the activating agents. The activated carbons obtained were characterized by determining the percentage yield, moisture content, ash content and percentage fixed carbon. The adsorption of methylene blue by the activated carbon was done using 0.1 to 0.5g of the activated carbon. The results revealed that the percentage yield and ash content of H3PO4 impregnated activated carbon was higher than ZnCl2 impregnated activated carbon. On the other hand ZnCl2 impregnated activated carbon had higher moisture content and percentage fixed carbon. It was also revealed that ZnCl2 impregnated activated carbon had greater adsorption capacity than H3PO4 impregnated activated carbon. However it was found that the higher the adsorbent (activated carbon) dosage, the higher the adsorption capacity.
This document describes the design of a municipal solid waste incinerator for use in semi-arid regions of West Africa. The calorific value of solid waste in the study area ranges from 5.024 to 5.867 MJ/kg, which is not high enough to sustain incineration. The designed incinerator uses a parallel flow concept and will mix the solid waste with 50% bagasse, a waste fiber residue from sugarcane with a calorific value of 8.59-13.60 MJ/kg, to achieve the required calorific value. Key design specifications of the incinerator include a total volume of 82.5 m3, bed length of 11m, bed
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Pyrolysis of Scrap Tyres and Waste Lube Oil by Using Catalytic AgentIJERA Editor
Scrape tyres and waste lube oil are the cause of great environmental issues because they are not biodegradable
and their elements cannot be recovered and they are causing great environmental pollution. Secondly, the world
needs the new sources of energy due to depletion of oil sources. In this experiment, pyrolysis of scrape tyres
alone and pyrolysis of mixture of scrape tyres and used lubricating oil by using catalytic agent (CaCO3) is done
to see the effect of waste lube oil and catalytic agent on pyrolysis of scrape tyres. The value of products of both
samples (scrape tyres alone, mixture of scrape tyres and used lubricating oil) has been studied and compared.
Air pollution is most important from the public health of view, because every individual person breaths approximately 22000 times a day, inhaling about 15 to 22 kg of air daily. The main pollutants contribute by automobile are carbon monoxide (CO), unburned hydrocarbon (UBHC), oxides of nitrogen (NOx) and Lead. Pollutant removal from combustion gas in both SI&CI is one of the most widely known environmental applications of activated carbons. In order to guarantee the successful removal of contaminants and pollutants on activated carbons, the developments of new adsorbents has been increasing in the last few years. This paper is a systematic study of cleaning SI&CI engine of CO, SO2, NO2 Using activated carbon filter. The combustion gases were qualitative and quantitative analyzed by gas chromatography. The use of this simple method is a valuable alternative to meet emission standards in developing countries. It was demonstrated that the agricultural wastes studied here are a feasible alternative for reducing pollutants in SI & CI engine.
8 leaching of trace elements in enugu coal effect of acid concentrationINFOGAIN PUBLICATION
The effect of acid concentration on the trace elements composition of Enugu sub-bituminous coal from Onyeama Mine was investigated by leaching the coal using nitric acid (HNO3) of 0.5M, 1.0M, 1.5M and 2.0M concentrations. The amount of trace elements (in ppm) present in the filtrate from the leaching process were determined using Varian AA240 Atomic Absorption Spectrophotometer with cathode lamps of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), and lead (Pb). Optimum leaching condition of the trace metals were obtained using 2.0M HNO3 solution for 1 hour and 75µm particle size which resulted in the detection of As(1.363ppm), Cu (1.413ppm), Cr (0.764ppm), Cd (0.146), and Pb (1.942ppm). 2.0M concentration of nitric acid has proven to be very effective in the leaching of trace metals in Enugu coal. Result of the SEM analysis shows that the porosity of the coal residue was increased and this provides strong evidence that significant amounts of inorganic elements were removed. Onyeama coal, therefore, contains large proportions of silica, calcium carbonate, and dolomite, as well as some elements such as aluminum, iron, and potassium, and other trace metals such as lead, chromium, cadmium, arsenic, mercury, copper.
Using environmental forensics techniques to identify fugitive methane. Techniques included VOCs, fixed gases, stable isotopes, and radioactive carbon to identify soil gas samples from a variety of urban settings.
The document summarizes a presentation on pyrolysis for waste plastics recycling. It discusses the advantages of plastics pyrolysis, characteristics of different waste plastics during thermal degradation, and results from lab-scale pyrolysis experiments and product analysis. Thermogravimetric analysis was used to determine the temperature range for plastic degradation. Fourier transform infrared spectroscopy analysis identified functional groups in volatile and solid pyrolysis products, including aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, ethers, esters and carboxylic acids. The optimal temperature range for lab-scale plastic pyrolysis was determined to be 400-500°C.
R. Subash prepared graphitic carbon nitride (g-C3N4) and bismuth vanadate (BiVO4) using different synthesis methods and characterized their properties. g-C3N4 nanosheets and bulk g-C3N4 were synthesized via calcination, while BiVO4 nanorods were prepared using a hydrothermal method. Various g-C3N4/BiVO4 hybrid materials with different weight percentages were also synthesized hydrothermally. The materials were characterized using UV-vis spectroscopy, XRD, FT-IR and FE-SEM to analyze their optical, crystalline and morphological properties. The bandgaps of the hybrid materials decreased with increasing g-C3N4
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
1) The document summarizes research on measuring the optical and chemical properties of black carbon particles in Toronto. Samples were collected over 3 weeks in June 2013 using various instruments including a photoacoustic soot spectrometer and aerosol mass spectrometer.
2) The research found evidence of brown carbon absorption enhancing black carbon absorption at 405nm but not 781nm. Dividing the sampling period into subsets showed the enhancement was strongest when influenced by wildfires.
3) The findings indicate optical lensing is not enhancing black carbon absorption in Toronto as much as models predict. Care is needed in accounting for black carbon mixing state in climate models.
The document discusses the conversion of waste plastics into fuel through a thermal degradation process without using catalysts or chemicals. None coded waste plastics are subjected to thermal cracking in a muffle furnace at 420°C and in a reactor from 300-420°C. This produces 85% liquid fuel, 9% light gases, and 6% carbon residue. Analysis of the produced fuel using GC/MS and FT-IR found it contains hydrocarbon compounds ranging from C3-C28, including alkanes and alkenes that could be used as a fuel or feedstock.
— The study comprises estimate of wet deposited nitrogenous compounds in Assam (India). Deposition has been estimated from a survey works (2010-11) at urban and peri-urban areas of Assam. Air samples were collected by clinical syringe (10 cm 3) for Oxides of Nitrogen (NO, NO 2 : NOx) and reduced Nitrogen (NH 3 , NH 4 + : NHy). The samples were diffused into 10 cm 3 each of distilled water and 0.1N HCl respectively for estimation of mean concentration of weighted hydrogen (µeql-1), quantity of elemental nitrogen (N) or nitrate (NO 3-1) and ammonium (NH 4 +) ions expressed in mg l-1 or kg ha-1 y-1. The measured concentrations of the nitrogenous compounds were interpolated with a properly used Kriging Technique on a 1km x 1km grid covering districts characterised by varying congestions of population, vehicular transport and of industrial evidences. There were many fold variations of these air quality parameters among the major sites and locations of the pollutants e.g. nitrogen deposited through aerosol of its oxides ranged from 6.0-38 kg ha-1 yr-1 , whereas nitrogen accumulation from the reduced aerosol was 7-24 kg ha-1 yr-1. Tissue nitrogen in some indicator plant species (e.g.Pinus longifolia, Ficus benjamina), collected from the square grids of polluted areas was also elevated. Thus, the hypothesis that the Northeast India, especially Assam is also facing with enrichment of nitrogenous pollution due to anthropogenic activities, mass vehicular and industrial growth, was tested.
IRJET- Biogas Production from Municipal Solid Waste:- A ReviewIRJET Journal
This document reviews biogas production from municipal solid waste via anaerobic digestion. It discusses key factors that affect biogas production such as temperature, pH, carbon-nitrogen ratio, total solids and volatile solids. The document reviews several past studies on biogas production from waste materials like cattle manure, fruit and vegetable waste, and municipal waste. It finds that biogas yield varies significantly depending on factors like feedstock used and digestion conditions. The maximum reported methane yield was 404 ml/g VS from wheat plant waste, while the minimum was 0.40 Nm3/kgVS from waste in Varanasi, India. Further optimization of digestion systems is needed to improve biogas production efficiency from municipal solid waste
PREPARATION OF BRIQUETTE IN AN INNOVATIVE AND COST EFFECTIVE WAY AND ITS TEST...BIBHUTI BHUSAN SAMANTARAY
This research was conducted for a cleaner
densified biomass solid fuel to reduce the dependency on
woodland which is increasingly becoming critical due to
rural cooking. In this paper study was conducted to
determine the optimum mixing ratio of coal dust (CD) to
saw dust (SD) to produce a solid fuel-CSB (Coal Saw
Briquette). Mixing inefficiency shows starch and water are
also required for adequate strength of CSB. Objective of
the study was to investigate PHU, emission analysis and
cost factor. From research, it was concluded that CD to SD
of ratio 70:30 is suitable for production and usability.
Absence of critical particulate emission (like carbon
monoxide) and higher calorific value promotes it as an
alternative sustainable fuel in rural society. CSB not only
reduce the use of wood energy but also decreases the
statistic for premature death due to indoor air pollution
caused from cooking with biomass.
The document summarizes presentations from a conference on a new Swiss category for mineral recycling fertilizers called MinRec. It defines MinRec and compares limits for heavy metals and organic pollutants to the EU fertilizer regulation. Requirements for introducing MinRec fertilizers to the market include analyzing nutrient contents, solubility, and ensuring contaminant levels meet defined limits for heavy metals, organic pollutants, and microbiological residues. The agronomic quality of MinRec materials must be characterized using neutral-ammonium citrate and citric acid extracts rather than water solubility alone.
CH-3. Anaerobic treatment of wastewaterTadviDevarshi
Anaerobic treatment process, Effects of pH, temperature and other parameters on anaerobic treatment, Concept of anaerobic contact process, anaerobic filter, anaerobic fixed film reactor, fluidized bed and expanded bed reactors and up flow anaerobic sludge blanket (UASB) reactor.
1) Anaerobic treatment is a biological process that occurs without oxygen to stabilize organic materials by converting them to methane, carbon dioxide, and ammonia.
2) It has several advantages over aerobic treatment including lower energy requirements, energy generation in the form of methane gas, and lower sludge production.
3) The process involves several groups of microorganisms that break down organic matter in stages through hydrolysis, acidogenesis, acetogenesis, and methanogenesis.
Gasification Performance Improvement of Treated SRF Residue by Using Minerals...Md Tanvir Alam
The document discusses gasification performance of treated solid refuse fuel (TSRF) residue. Key findings include:
1) TSRF gasification produced syngas mainly of H2, CO, CO2 and CH4. Maximum syngas yield and heating value occurred at an equivalence ratio of 0.2.
2) Adding minerals like dolomite or lime to the gasification bed increased syngas component yields and lowered tar. Dolomite addition yielded the highest syngas.
3) Co-gasifying TSRF with 25% biomass waste increased syngas component and heating values the most. Using a 25% biomass and dolomite blend yielded the highest
This document examines energy recovery from mixed paper waste through combustion. It discusses that paper waste makes up a large portion of municipal solid waste and has benefits as an energy source such as being free of contaminants, having a high heating value, and producing low emissions. The document then explores emissions from combusting paper waste and various control methods. It outlines an experimental study to determine the calorific value of different paper types and calculate the energy value of mixed paper waste samples. The goal is to estimate the energy potential from known compositions of mixed paper.
This document summarizes a study that measured carbonaceous aerosol concentrations at an urban residential site in Agra, India from May to August 2011. The key findings include:
1) The average concentration of PM2.5 was 55.3±17.4 μg/m3, within prescribed limits. Organic carbon varied from 7.6 to 37.5 μg/m3 with an average of 18.2±6.4 μg/m3. Elemental carbon ranged from 1.2 to 9.4 μg/m3 with an average of 3.2±1.6 μg/m3.
2) Total carbonaceous aerosols accounted for 64.9%
Preparation and Characterization of Activated Carbon from Hura Crepitans Linn...theijes
Activated carbons were thermally prepared from Hura Crepitan L. seed shells. Zinc chloride (ZnCl2) and Phosphoric acid (H3PO4) were separately used as the activating agents. The activated carbons obtained were characterized by determining the percentage yield, moisture content, ash content and percentage fixed carbon. The adsorption of methylene blue by the activated carbon was done using 0.1 to 0.5g of the activated carbon. The results revealed that the percentage yield and ash content of H3PO4 impregnated activated carbon was higher than ZnCl2 impregnated activated carbon. On the other hand ZnCl2 impregnated activated carbon had higher moisture content and percentage fixed carbon. It was also revealed that ZnCl2 impregnated activated carbon had greater adsorption capacity than H3PO4 impregnated activated carbon. However it was found that the higher the adsorbent (activated carbon) dosage, the higher the adsorption capacity.
This document describes the design of a municipal solid waste incinerator for use in semi-arid regions of West Africa. The calorific value of solid waste in the study area ranges from 5.024 to 5.867 MJ/kg, which is not high enough to sustain incineration. The designed incinerator uses a parallel flow concept and will mix the solid waste with 50% bagasse, a waste fiber residue from sugarcane with a calorific value of 8.59-13.60 MJ/kg, to achieve the required calorific value. Key design specifications of the incinerator include a total volume of 82.5 m3, bed length of 11m, bed
International Journal of Engineering and Science Invention (IJESI) is an international journal intended for professionals and researchers in all fields of computer science and electronics. IJESI publishes research articles and reviews within the whole field Engineering Science and Technology, new teaching methods, assessment, validation and the impact of new technologies and it will continue to provide information on the latest trends and developments in this ever-expanding subject. The publications of papers are selected through double peer reviewed to ensure originality, relevance, and readability. The articles published in our journal can be accessed online.
Pyrolysis of Scrap Tyres and Waste Lube Oil by Using Catalytic AgentIJERA Editor
Scrape tyres and waste lube oil are the cause of great environmental issues because they are not biodegradable
and their elements cannot be recovered and they are causing great environmental pollution. Secondly, the world
needs the new sources of energy due to depletion of oil sources. In this experiment, pyrolysis of scrape tyres
alone and pyrolysis of mixture of scrape tyres and used lubricating oil by using catalytic agent (CaCO3) is done
to see the effect of waste lube oil and catalytic agent on pyrolysis of scrape tyres. The value of products of both
samples (scrape tyres alone, mixture of scrape tyres and used lubricating oil) has been studied and compared.
Air pollution is most important from the public health of view, because every individual person breaths approximately 22000 times a day, inhaling about 15 to 22 kg of air daily. The main pollutants contribute by automobile are carbon monoxide (CO), unburned hydrocarbon (UBHC), oxides of nitrogen (NOx) and Lead. Pollutant removal from combustion gas in both SI&CI is one of the most widely known environmental applications of activated carbons. In order to guarantee the successful removal of contaminants and pollutants on activated carbons, the developments of new adsorbents has been increasing in the last few years. This paper is a systematic study of cleaning SI&CI engine of CO, SO2, NO2 Using activated carbon filter. The combustion gases were qualitative and quantitative analyzed by gas chromatography. The use of this simple method is a valuable alternative to meet emission standards in developing countries. It was demonstrated that the agricultural wastes studied here are a feasible alternative for reducing pollutants in SI & CI engine.
8 leaching of trace elements in enugu coal effect of acid concentrationINFOGAIN PUBLICATION
The effect of acid concentration on the trace elements composition of Enugu sub-bituminous coal from Onyeama Mine was investigated by leaching the coal using nitric acid (HNO3) of 0.5M, 1.0M, 1.5M and 2.0M concentrations. The amount of trace elements (in ppm) present in the filtrate from the leaching process were determined using Varian AA240 Atomic Absorption Spectrophotometer with cathode lamps of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), and lead (Pb). Optimum leaching condition of the trace metals were obtained using 2.0M HNO3 solution for 1 hour and 75µm particle size which resulted in the detection of As(1.363ppm), Cu (1.413ppm), Cr (0.764ppm), Cd (0.146), and Pb (1.942ppm). 2.0M concentration of nitric acid has proven to be very effective in the leaching of trace metals in Enugu coal. Result of the SEM analysis shows that the porosity of the coal residue was increased and this provides strong evidence that significant amounts of inorganic elements were removed. Onyeama coal, therefore, contains large proportions of silica, calcium carbonate, and dolomite, as well as some elements such as aluminum, iron, and potassium, and other trace metals such as lead, chromium, cadmium, arsenic, mercury, copper.
Using environmental forensics techniques to identify fugitive methane. Techniques included VOCs, fixed gases, stable isotopes, and radioactive carbon to identify soil gas samples from a variety of urban settings.
The document summarizes a presentation on pyrolysis for waste plastics recycling. It discusses the advantages of plastics pyrolysis, characteristics of different waste plastics during thermal degradation, and results from lab-scale pyrolysis experiments and product analysis. Thermogravimetric analysis was used to determine the temperature range for plastic degradation. Fourier transform infrared spectroscopy analysis identified functional groups in volatile and solid pyrolysis products, including aliphatic hydrocarbons, aromatic hydrocarbons, alcohols, ethers, esters and carboxylic acids. The optimal temperature range for lab-scale plastic pyrolysis was determined to be 400-500°C.
R. Subash prepared graphitic carbon nitride (g-C3N4) and bismuth vanadate (BiVO4) using different synthesis methods and characterized their properties. g-C3N4 nanosheets and bulk g-C3N4 were synthesized via calcination, while BiVO4 nanorods were prepared using a hydrothermal method. Various g-C3N4/BiVO4 hybrid materials with different weight percentages were also synthesized hydrothermally. The materials were characterized using UV-vis spectroscopy, XRD, FT-IR and FE-SEM to analyze their optical, crystalline and morphological properties. The bandgaps of the hybrid materials decreased with increasing g-C3N4
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
1) The document summarizes research on measuring the optical and chemical properties of black carbon particles in Toronto. Samples were collected over 3 weeks in June 2013 using various instruments including a photoacoustic soot spectrometer and aerosol mass spectrometer.
2) The research found evidence of brown carbon absorption enhancing black carbon absorption at 405nm but not 781nm. Dividing the sampling period into subsets showed the enhancement was strongest when influenced by wildfires.
3) The findings indicate optical lensing is not enhancing black carbon absorption in Toronto as much as models predict. Care is needed in accounting for black carbon mixing state in climate models.
The document discusses the conversion of waste plastics into fuel through a thermal degradation process without using catalysts or chemicals. None coded waste plastics are subjected to thermal cracking in a muffle furnace at 420°C and in a reactor from 300-420°C. This produces 85% liquid fuel, 9% light gases, and 6% carbon residue. Analysis of the produced fuel using GC/MS and FT-IR found it contains hydrocarbon compounds ranging from C3-C28, including alkanes and alkenes that could be used as a fuel or feedstock.
— The study comprises estimate of wet deposited nitrogenous compounds in Assam (India). Deposition has been estimated from a survey works (2010-11) at urban and peri-urban areas of Assam. Air samples were collected by clinical syringe (10 cm 3) for Oxides of Nitrogen (NO, NO 2 : NOx) and reduced Nitrogen (NH 3 , NH 4 + : NHy). The samples were diffused into 10 cm 3 each of distilled water and 0.1N HCl respectively for estimation of mean concentration of weighted hydrogen (µeql-1), quantity of elemental nitrogen (N) or nitrate (NO 3-1) and ammonium (NH 4 +) ions expressed in mg l-1 or kg ha-1 y-1. The measured concentrations of the nitrogenous compounds were interpolated with a properly used Kriging Technique on a 1km x 1km grid covering districts characterised by varying congestions of population, vehicular transport and of industrial evidences. There were many fold variations of these air quality parameters among the major sites and locations of the pollutants e.g. nitrogen deposited through aerosol of its oxides ranged from 6.0-38 kg ha-1 yr-1 , whereas nitrogen accumulation from the reduced aerosol was 7-24 kg ha-1 yr-1. Tissue nitrogen in some indicator plant species (e.g.Pinus longifolia, Ficus benjamina), collected from the square grids of polluted areas was also elevated. Thus, the hypothesis that the Northeast India, especially Assam is also facing with enrichment of nitrogenous pollution due to anthropogenic activities, mass vehicular and industrial growth, was tested.
IRJET- Biogas Production from Municipal Solid Waste:- A ReviewIRJET Journal
This document reviews biogas production from municipal solid waste via anaerobic digestion. It discusses key factors that affect biogas production such as temperature, pH, carbon-nitrogen ratio, total solids and volatile solids. The document reviews several past studies on biogas production from waste materials like cattle manure, fruit and vegetable waste, and municipal waste. It finds that biogas yield varies significantly depending on factors like feedstock used and digestion conditions. The maximum reported methane yield was 404 ml/g VS from wheat plant waste, while the minimum was 0.40 Nm3/kgVS from waste in Varanasi, India. Further optimization of digestion systems is needed to improve biogas production efficiency from municipal solid waste
PREPARATION OF BRIQUETTE IN AN INNOVATIVE AND COST EFFECTIVE WAY AND ITS TEST...BIBHUTI BHUSAN SAMANTARAY
This research was conducted for a cleaner
densified biomass solid fuel to reduce the dependency on
woodland which is increasingly becoming critical due to
rural cooking. In this paper study was conducted to
determine the optimum mixing ratio of coal dust (CD) to
saw dust (SD) to produce a solid fuel-CSB (Coal Saw
Briquette). Mixing inefficiency shows starch and water are
also required for adequate strength of CSB. Objective of
the study was to investigate PHU, emission analysis and
cost factor. From research, it was concluded that CD to SD
of ratio 70:30 is suitable for production and usability.
Absence of critical particulate emission (like carbon
monoxide) and higher calorific value promotes it as an
alternative sustainable fuel in rural society. CSB not only
reduce the use of wood energy but also decreases the
statistic for premature death due to indoor air pollution
caused from cooking with biomass.
The document summarizes presentations from a conference on a new Swiss category for mineral recycling fertilizers called MinRec. It defines MinRec and compares limits for heavy metals and organic pollutants to the EU fertilizer regulation. Requirements for introducing MinRec fertilizers to the market include analyzing nutrient contents, solubility, and ensuring contaminant levels meet defined limits for heavy metals, organic pollutants, and microbiological residues. The agronomic quality of MinRec materials must be characterized using neutral-ammonium citrate and citric acid extracts rather than water solubility alone.
CH-3. Anaerobic treatment of wastewaterTadviDevarshi
Anaerobic treatment process, Effects of pH, temperature and other parameters on anaerobic treatment, Concept of anaerobic contact process, anaerobic filter, anaerobic fixed film reactor, fluidized bed and expanded bed reactors and up flow anaerobic sludge blanket (UASB) reactor.
1) Anaerobic treatment is a biological process that occurs without oxygen to stabilize organic materials by converting them to methane, carbon dioxide, and ammonia.
2) It has several advantages over aerobic treatment including lower energy requirements, energy generation in the form of methane gas, and lower sludge production.
3) The process involves several groups of microorganisms that break down organic matter in stages through hydrolysis, acidogenesis, acetogenesis, and methanogenesis.
Biomas- Importance of Biomass and classification of Energy conversionHARI NUNAVATH
This document discusses renewable energy and green technology, specifically focusing on biomass. It defines biomass and lists various biomass sources including agricultural residues. It then discusses the importance of biomass and availability in India. The key methods to convert biomass are described as thermo-chemical (combustion, gasification, pyrolysis), bio-chemical, and oil extraction. The principles and processes of combustion, gasification, and pyrolysis are explained in further detail.
PRODUCTION, CHARACTERIZATION AND FUEL PROPERTIES OF ALTERNATIVE DIESEL FUEL F...Anand Mohan
1. The document describes the production and characterization of an alternative diesel fuel produced from the pyrolysis of plastic grocery bags. Plastic grocery bags made of high-density polyethylene were pyrolyzed in a batch reactor at 420-440°C to produce a plastic crude oil.
2. The plastic crude oil was distilled into fractions equivalent to gasoline and diesel fuels, which were then characterized through GC-MS, simulated distillation, SEC, NMR and FT-IR analysis. The analyses showed that the fractions consisted of mixtures of hydrocarbons similar to petroleum fuels.
3. Properties of the diesel fractions like cloud point, pour point and cetane number were comparable or better than conventional ultra-low sulfur diesel
International Journal of Engineering Research and DevelopmentIJERD Editor
Electrical, Electronics and Computer Engineering,
Information Engineering and Technology,
Mechanical, Industrial and Manufacturing Engineering,
Automation and Mechatronics Engineering,
Material and Chemical Engineering,
Civil and Architecture Engineering,
Biotechnology and Bio Engineering,
Environmental Engineering,
Petroleum and Mining Engineering,
Marine and Agriculture engineering,
Aerospace Engineering.
Microwave-Assisted hydrothermal carbonization and characterization of Amazoni...perrrrojosesoto
Microwave-Assisted hydrothermal carbonization and characterization of Amazonian biomass as an activated carbon for methane adsorption - ScienceDirect.pdf
This document describes a study on producing activated carbon from agricultural waste. Researchers tested two types of agricultural waste - rice husk and paper mill waste - as precursors for activated carbon production. They characterized the wastes using CHNS elemental analysis and proximate analysis to determine which was superior. Paper mill waste was found to be a better precursor. It was chemically activated using zinc chloride, potassium hydroxide, and potassium chloride. The researchers optimized production conditions and characterized the activated carbon produced in terms of iodine value, yield percentage, apparent density, ash content, and moisture content. The activated carbon with the highest iodine value of 764.80 mg/g was produced using zinc chloride as the activating agent.
The document discusses integrated green technologies for municipal solid waste (MSW) management. It describes an automated waste collection system and various MSW thermo-chemical conversion technologies, including recycling, combustion, incineration, pyrolysis, gasification, and advanced thermal gasification. Incineration can generate energy from MSW but requires effective pollution controls. Emerging technologies like gasification and pyrolysis produce syngas and oils while advanced thermal gasification vitrifies waste into inert materials. Overall, thermal conversion technologies allow for more sustainable MSW management compared to landfilling but require further commercialization and environmental assessment.
A short description of thermal technologies for the recovery of ammonia from N-rich wastewaters and expirementing with membrane distillation for getting better results.
Welcome to International Journal of Engineering Research and Development (IJERD)IJERD Editor
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yahoo journals, bing journals, International Journal of Engineering Research and Development, google journals, hard copy of journal
Power Generation in Future by Using Landfill GasesIJARIIT
this paper describes an approach to power generation in future by using landfill gases. The present day methods of power generation are not much efficient & it may not be sufficient or suitable to keep pace with ever increasing demand. The recent severe energy crisis has forced the world to rethink & develop the landfill gas type power generation which remained unthinkable for several years after its discovery. Generation of electricity by using landfill gases is unique and highly efficient with nearly zero pollution. Landfill gas utilization is a process of gathering, processing, and treating the methane gas emitted from decomposing garbage to produce electricity. In advanced countries this technique is already in use but in developing countries it’s still under construction. The efficiency is also better than other non-conventional energy sources. These projects are popular because they control energy costs and reduce greenhouse gas emissions. These projects collect the methane gas and treat it, so it can be used for electricity or upgraded to pipeline-grade gas. These projects power homes, buildings, and vehicles. Keywords-landfill gas process, LFG collection system, flaring, LFG gas treatment, gas turbine, and micro turbine.
This document provides an overview of combustion processes and flue gas analysis. It discusses the combustion process, including the types of fuels used and concepts like excess air value. It then covers analyzing process gases in industry for purposes like combustion optimization, process control, and emissions monitoring and control. The document also discusses gas analysis techniques, terms, and measuring principles. Finally, it gives examples of applying gas analyzers across different industries like power generation, waste disposal, mining, metals, chemicals, and others.
Activated carbon was prepared from lignocellulosic
material (Eucalyptus Globulus labill seed) by
chemical activation with ZnCl2 at two different concentrations
(10 and 25 % m/v) named ACS25 and ACS10. The
textural characteristics of the activated carbons (ACs) were
determined by N2 adsorption isotherms; these exhibit
B.E.T. surface areas of 250 and 300 m2 g-1 for ACS25 and
ACS10, respectively, with micropore volume contents of
0.140 and 0.125 cm3 g-1 in the same order. In addition, the
FTIR and Boehm methods were conducted for the chemical
characterisation of ACs, where many groups with basic
character were found, which favours the adsorption of
phenols. The prepared carbonaceous adsorbents were used
in the adsorption of wide pollutants monosubstituted phenol
derivatives: phenol, 4-nitrophenol and 4-chlorophenol.
The effect of temperature on the thermodynamics, kinetic
and equilibrium of phenols adsorption on ACs was thoroughly
examined. The adsorption kinetics adjusted properly
for a pseudo-second-order kinetic model. However, the
Elovich model (chemisorption) confirms that phenols
adsorption did not occur via the sharing of electrons
between the phenolic ring and basal plane of ACs because
is not properly adjusted, so the process is given by
physisorption. The thermodynamic parameters [i.e. Gibbs
free energy change (DG), enthalpy change (DH) and
entropy change (DS)] were also evaluated.
The document discusses a method for producing synthesis gas (syngas) from gasification of bagasse. Bagasse is a waste product from sugar production that is abundant in India. Syngas produced from bagasse gasification can be used as an alternative fuel source for power generation and other industrial processes. The method involves pyrolyzing bagasse in a free-fall reactor to produce char, and then gasifying the char in a packed bed reactor to produce syngas, which consists mainly of carbon monoxide and hydrogen. Experimental results show that syngas yield increases with higher temperature and smaller bagasse particle size during pyrolysis.
This document provides an overview of biomass and bioenergy. It begins by defining biomass as biological material from living or recently living organisms. It then discusses various biomass sources including forestry residues, agricultural crops and residues, and municipal solid waste. The document outlines some key thermochemical and biochemical conversion processes for biomass including pyrolysis, gasification, fermentation and biomethanation. It provides details on pyrolysis and gasification processes, reaction mechanisms, product yields and types of reactors. The document also includes examples of biomass composition analysis and calculations involving biomass conversion and product yields.
The document discusses different aspects of biomass pyrolysis including:
- An overview of biomass pyrolysis and the products generated including bio-oil, bio-char, and gases
- Factors that affect biomass pyrolysis like temperature, heating rate, and feedstock characteristics
- Methods for characterizing the chemical and physical properties of the pyrolysis products
- An example research study on the pyrolysis of various biomass and plastic blends
COD reduction of aromatic polluted waste water by Advanced Oxidation Process ...Wade Bitaraf
In most petrochemical complexes and oil refineries the wastewater contains the aromatic compounds among which Benzene, Toluene, Ethyl Benzene and Xylene (BTEX) have harmful effects on environment and human health. The present work mainly deals with the UV-based advanced oxidation processes (AOPs), UV/H2O2 were tested in batch reactor systems to evaluate the removal efficiencies and optimal conditions for the photodegradation of BTEX in order to wastewater treatment. The efficiency of this method was analyzed by evaluating the Chemical Oxygen Demand (COD) as a pollution criterion through the COD reactor. The influence of the basic operational parameters such as initial concentration of H2O2, pH, Temperature, irradiation time and UV amount on the photo degradation of BTEX were also studied. The oxidation rate of BTEX and respectively the reduction rate of COD were low when the oxidation was carried out in the absence of H2O2 or UV light. The addition of proper amount of hydrogen peroxide improved the degradation, while the excess hydrogen peroxide could quench the formation of hydroxyl radicals (•OH). The optimal conditions of suspended slurry with 1.11(g/l) initial concentration of H2O2 and pH value of 3.1 were obtained under three UV lights illumination (6 W). Under the optimal conditions, COD reduction during the initial period of 180 min in UV/H2O2 systems reached about 90%.
Incineration Process for Solid Waste Management and Effective Utilization of ...IRJET Journal
This document discusses municipal solid waste incineration as a management option for solid waste. It describes the incineration process, which involves combusting waste materials to produce heat, flue gases, and ash. The by-products - heat, flue gases containing nitrogen, carbon dioxide, and sulfur dioxide, and ash - can be effectively utilized. Heat can be used to generate electricity, flue gases can be processed to extract elements like sulfur for use in fertilizers and dental treatments, and ash can be used in construction materials. The document also outlines different incineration technologies, plant location considerations, and air pollution control methods used to clean flue gases before emission.
Presented by The Global Peatlands Assessment: Mapping, Policy, and Action at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Microbial characterisation and identification, and potability of River Kuywa ...Open Access Research Paper
Water contamination is one of the major causes of water borne diseases worldwide. In Kenya, approximately 43% of people lack access to potable water due to human contamination. River Kuywa water is currently experiencing contamination due to human activities. Its water is widely used for domestic, agricultural, industrial and recreational purposes. This study aimed at characterizing bacteria and fungi in river Kuywa water. Water samples were randomly collected from four sites of the river: site A (Matisi), site B (Ngwelo), site C (Nzoia water pump) and site D (Chalicha), during the dry season (January-March 2018) and wet season (April-July 2018) and were transported to Maseno University Microbiology and plant pathology laboratory for analysis. The characterization and identification of bacteria and fungi were carried out using standard microbiological techniques. Nine bacterial genera and three fungi were identified from Kuywa river water. Clostridium spp., Staphylococcus spp., Enterobacter spp., Streptococcus spp., E. coli, Klebsiella spp., Shigella spp., Proteus spp. and Salmonella spp. Fungi were Fusarium oxysporum, Aspergillus flavus complex and Penicillium species. Wet season recorded highest bacterial and fungal counts (6.61-7.66 and 3.83-6.75cfu/ml) respectively. The results indicated that the river Kuywa water is polluted and therefore unsafe for human consumption before treatment. It is therefore recommended that the communities to ensure that they boil water especially for drinking.
Improving the viability of probiotics by encapsulation methods for developmen...Open Access Research Paper
The popularity of functional foods among scientists and common people has been increasing day by day. Awareness and modernization make the consumer think better regarding food and nutrition. Now a day’s individual knows very well about the relation between food consumption and disease prevalence. Humans have a diversity of microbes in the gut that together form the gut microflora. Probiotics are the health-promoting live microbial cells improve host health through gut and brain connection and fighting against harmful bacteria. Bifidobacterium and Lactobacillus are the two bacterial genera which are considered to be probiotic. These good bacteria are facing challenges of viability. There are so many factors such as sensitivity to heat, pH, acidity, osmotic effect, mechanical shear, chemical components, freezing and storage time as well which affects the viability of probiotics in the dairy food matrix as well as in the gut. Multiple efforts have been done in the past and ongoing in present for these beneficial microbial population stability until their destination in the gut. One of a useful technique known as microencapsulation makes the probiotic effective in the diversified conditions and maintain these microbe’s community to the optimum level for achieving targeted benefits. Dairy products are found to be an ideal vehicle for probiotic incorporation. It has been seen that the encapsulated microbial cells show higher viability than the free cells in different processing and storage conditions as well as against bile salts in the gut. They make the food functional when incorporated, without affecting the product sensory characteristics.
Kinetic studies on malachite green dye adsorption from aqueous solutions by A...Open Access Research Paper
Water polluted by dyestuffs compounds is a global threat to health and the environment; accordingly, we prepared a green novel sorbent chemical and Physical system from an algae, chitosan and chitosan nanoparticle and impregnated with algae with chitosan nanocomposite for the sorption of Malachite green dye from water. The algae with chitosan nanocomposite by a simple method and used as a recyclable and effective adsorbent for the removal of malachite green dye from aqueous solutions. Algae, chitosan, chitosan nanoparticle and algae with chitosan nanocomposite were characterized using different physicochemical methods. The functional groups and chemical compounds found in algae, chitosan, chitosan algae, chitosan nanoparticle, and chitosan nanoparticle with algae were identified using FTIR, SEM, and TGADTA/DTG techniques. The optimal adsorption conditions, different dosages, pH and Temperature the amount of algae with chitosan nanocomposite were determined. At optimized conditions and the batch equilibrium studies more than 99% of the dye was removed. The adsorption process data matched well kinetics showed that the reaction order for dye varied with pseudo-first order and pseudo-second order. Furthermore, the maximum adsorption capacity of the algae with chitosan nanocomposite toward malachite green dye reached as high as 15.5mg/g, respectively. Finally, multiple times reusing of algae with chitosan nanocomposite and removing dye from a real wastewater has made it a promising and attractive option for further practical applications.
RoHS stands for Restriction of Hazardous Substances, which is also known as t...vijaykumar292010
RoHS stands for Restriction of Hazardous Substances, which is also known as the Directive 2002/95/EC. It includes the restrictions for the use of certain hazardous substances in electrical and electronic equipment. RoHS is a WEEE (Waste of Electrical and Electronic Equipment).
Optimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...Joshua Orris
Results of geophysics and pneumatic injection pilot tests during 2003 – 2007 yielded significant positive results for injection delivery design and contaminant mass treatment, resulting in permanent shut-down of an existing groundwater Pump & Treat system.
Accessible source areas were subsequently removed (2011) by soil excavation and treated with the placement of Emulsified Vegetable Oil EVO and zero-valent iron ZVI to accelerate treatment of impacted groundwater in overburden and weathered fractured bedrock. Post pilot test and post remediation groundwater monitoring has included analyses of CVOCs, organic fatty acids, dissolved gases and QuantArray® -Chlor to quantify key microorganisms (e.g., Dehalococcoides, Dehalobacter, etc.) and functional genes (e.g., vinyl chloride reductase, methane monooxygenase, etc.) to assess potential for reductive dechlorination and aerobic cometabolism of CVOCs.
In 2022, the first commercial application of MetaArray™ was performed at the site. MetaArray™ utilizes statistical analysis, such as principal component analysis and multivariate analysis to provide evidence that reductive dechlorination is active or even that it is slowing. This creates actionable data allowing users to save money by making important site management decisions earlier.
The results of the MetaArray™ analysis’ support vector machine (SVM) identified groundwater monitoring wells with a 80% confidence that were characterized as either Limited for Reductive Decholorination or had a High Reductive Reduction Dechlorination potential. The results of MetaArray™ will be used to further optimize the site’s post remediation monitoring program for monitored natural attenuation.
Evolving Lifecycles with High Resolution Site Characterization (HRSC) and 3-D...Joshua Orris
The incorporation of a 3DCSM and completion of HRSC provided a tool for enhanced, data-driven, decisions to support a change in remediation closure strategies. Currently, an approved pilot study has been obtained to shut-down the remediation systems (ISCO, P&T) and conduct a hydraulic study under non-pumping conditions. A separate micro-biological bench scale treatability study was competed that yielded positive results for an emerging innovative technology. As a result, a field pilot study has commenced with results expected in nine-twelve months. With the results of the hydraulic study, field pilot studies and an updated risk assessment leading site monitoring optimization cost lifecycle savings upwards of $15MM towards an alternatively evolved best available technology remediation closure strategy.
Epcon is One of the World's leading Manufacturing Companies.EpconLP
Epcon is One of the World's leading Manufacturing Companies. With over 4000 installations worldwide, EPCON has been pioneering new techniques since 1977 that have become industry standards now. Founded in 1977, Epcon has grown from a one-man operation to a global leader in developing and manufacturing innovative air pollution control technology and industrial heating equipment.
Wildlife-AnIntroduction.pdf so that you know more about our environment
Minggu 1 Pendahuluan
1. PENGOLAHAN SAMPAH MINGGU 1
PENDAHULUAN, PENGOLAHAN FISIKA,
DAN TERMAL)
Disiapkan oleh:
Bimastyaji Surya Ramadan
- Institut Teknologi Yogyakarta -
2. TUJUAN PEMBELAJARAN - REFERENSI
Tujuan
Mahasiswa dapat memahami dan menjelaskan macam, contoh, dan cara mendesain
pengolahan sampah
Referensi
1. Tchobanoglous et all, Integrated Solid Waste Management, Engineering Principles
and Management Issues, Mc Graw Hill, Inc.
2. Jurnal-jurnal pengolahan sampah
3. Peraturan-peraturan terkait pengelolaan dan pengolahan sampah
10. PRINSIP PENGOLAHAN SAMPAH
Knowing the composition of solid wastes
The key is material balance of solid waste management!
Material balance:
60 % is organic material
40 % is an-organic material
3R (Reduce, Recycle, Reuse)
How? (the answer is separate it by its composition)
11. ORGANIC MATERIAL
3R (Reduce, Recycle, Reuse)
The most used is composting/recycle (conventional)
The others are:
1. Anaerobic Digestion/recycle
2. Mechanical-biological (MB) treatment/recycle and reuse
3. Combustion
12. COMPOSTING/RECYCLE
Composting is an aerobic process and a large fraction of the degradable
organic carbon (DOC) in the waste material is converted into carbon dioxide
(CO2). CH4 is formed in anaerobic sections of the compost, but it is
oxidised to a large extent in the aerobic sections of the compost. The
estimated CH4 released into the atmosphere ranges from less than 1 percent
to a few percent of the initial carbon content in the material (Beck-Friis, 2001;
Detzel et al., 2003; Arnold, 2005).
Composting can also produce emissions of N2O. The range of the estimated
emissions varies from less than 0.5 percent to 5 percent of the initial nitrogen
content of the material (Petersen et al., 1998; Hellebrand 1998; Vesterinen,
1996; Beck-Friis, 2001; Detzel et al., 2003).
Poorly working composts are likely to produce more
both of CH4 and N2O (e.g., Vesterinen, 1996).
13. ANAEROBIC DIGESTION/RECYCLEAnaerobic digestion of organic waste expedites the
natural decomposition of organic material without
oxygen by maintaining the temperature, moisture
content and pH close to their optimum values.
Generated CH4 can be used to produce heat and/or
electricity, wherefore reporting of emissions from the
process is usually done in the Energy Sector. The CO2
emissions are of biogenic origin, and should be
reported only as an information item in the Energy
Sector. Emissions of CH4 from such facilities due to
unintentional leakages during process disturbances or
other unexpected events will generally be between 0
and 10 percent of the amount of CH4 generated. In
the absence of further information, use 5 percent as a
default value for the CH4 emissions. Where technical
standards for biogas plants ensure that unintentional
CH4 emissions are flared, CH4 emissions are likely to
be close to zero. N2O emissions from the process are
assumed to be negligible, however, the data on these
emissions are very scarce.
Riitta Pipatt, 2006
14. MECHANICAL-BIOLOGICAL (MB) TREATMENT/RECYCLE
AND REUSE Mechanical-biological (MB) treatment of waste is becoming popular
in Europe. In MB treatment, the waste material undergoes a series of
mechanical and biological operations that aim to reduce the volume of
the wasteas well as stabilise it to reduce emissions from final disposal.
The operations vary by application. Typically, the mechanical
operations separate the waste material into fractions that will under
go further treatment (composting, anaerobic digestion,
combustion, recycling). These may include separation, shredding
and crushing of the material. The biological operations include
composting and anaerobic digestion. The composting can take place
in heaps or in composting facilities with optimisation of the conditions
of the process as well as filtering of the produced gas. The possibilities
to reduce the amount of organic material to be disposed at landfills
are large, 40 - 60 percent (Kaartinen, 2004). Due to the reduced
amount in material, organic content and biological activity, the MB-
treated waste will produce up to 95 percent less CH4 than untreated
waste when disposed in SWDS. The practical reductions have been
smaller and depend on the type and duration of MB treatments in
question (see e.g., Binner, 2002). CH4 and N2O emissions during the
different phases of the MB treatment depend on the specific
operations and the duration of the biological treatment.
Riitta Pipatt, 2006
15. COMBUSTION
Incineration is a waste treatment
process that involves the combustion of
organic substances contained in waste
materials.(http://en.wikipedia.org/wiki
/Incineration#cite_note-0)
The most publicized concerns from
environmentalists about the incineration
of municipal solid wastes (MSW)
involve the fear that it produces
significant amounts of dioxin and furan
emissions.(http://en.wikipedia.org/wiki/
Incineration#cite_note-14)
Dioxins and furans are considered by
many to be serious health hazards.
16. AN-ORGANIC MATERIAL
3R (Reduce, Recycle, Reuse)
The most used is recycle and reuse (conventional)
The others are:
1. Combustion
2. etc
23. PENGOLAHAN FISIKA
Metode yang sering digunakan dalam pengolahan dan penanganan komponen
sampah menggunakan proses fisika adalah:
1. Pengurangan berdasarkan ukuran (Size reduction)
2. Pemisahan berdasarkan kuran (Size separation)
3. Pemisahan berdasarkan kepadatan (Density separation)
4. Pemisahan sampah tercampur menggunakan listrik dan magnetik (Electric and
magnetic separation)
5. Pemadatan (Compaction)
26. PENGOLAHAN TERMAL
Kelayakan proses termal tergantung pada komposisi kimia dari sampah. Biasanya
ada dua kombinasi bahan mudah terbakar dan tidak mudah terbakar.
Jika sampah digunakan sebagai bahan bakar, ada 4 sifat terpenting:
1. Proximat analysis
2. Fushing point of ash
3. Ultimate analysis (elemen utama)
4. Energy content
27. PROXIMATE ANALYSIS
1. Moisture (loss of moisture when heated to 105oC for 1 hour)
2. Volatile combustion matter (additional loss of weight on ignition at 950oC.
In a covered crucible)
3. Fixed Carbon (combustible residue left after volatile matter is removed)
4. Ash (weight of residue after combustion in an open crucible)
The test used to determine volatile combustible matter in a proximate analysis
is different from the volatile solids test used in biological determination.
28. FUSHING POINT OF ASH
Fushing point of ash is defined as that temperature at which the ash resulting
from the burning of waste will form a solid (clinker) by fusion and
agglomeration.
Typical fusing temperature for the formation of clinker from solid waste range
from 1100-1200oC
29. ULTIMATE ANALYSIS OF SOLID WASTE
Typically involves the determination of the percent C, H,O, N, S and ash.
Because of concern over the emmision of chlorinated compounds during
combustion, the determination of halogens is often included in an ultimate
analysis.
The results are used to characterize the chemical composition of the organic
matter and are used to define the proper mix of waste materials to achieve
suitable C/N ratios for biological convertion process in MSW.
30. ENERGY CONTENT OF SOLID WASTE COMPONENTS
Energy content of the organic components in MSW can be determined by :
1. Using a full scale boiler as calorimeter
2. Using a laboratory bomb calorimeter
3. Using calculation, if the elemental composition is known.
31. CHEMICAL TRANSFORMATIONS OF SOLID
WASTE
Transformation
Process
Methode Transformations Products
Combustion
(inceneration)
Thermal Oxidation CO2, SO2, Ash, and other oxidation products
Pyrolisis Dextructive distillation A gas stream containing a variety of gases, tar and
or oil, and a char
Gasification Starved air Combustion A low Btu gas, a char containing carbon and the
inerts originally in the fuel, and pyrolitic oil
32. COMBUSTION (CHEMICAL OXIDATION)
Combustion (incineration) can be used to reduce the original volume of the combustible
fraction of MSW by 85-95 %. The recovery of energy in the form of heat is another
attractive feature of combustion process.
In the presence of excess air and under ideal condition, the combustion of the organic
fraction of MSW can be represented by the following equation :
Organic Matter + excess air N2 + CO2 + H2O + O2 + ash + heat
Excess air used to ensure the complete combustion. In practice small amounts of
ammonia (NH3), SO2, Nitrogen Oxide (NOx) and other trace gases will also
be present, depending on the nature of the waste materials.
33. STOICHIOMETRIC COMBUSTION
The basic reaction for stoichiometric Combustion of carbon, hydrogen, sulfur are
follows :
For Carbon C + O2 CO2
12 32
For Hydrogen 2H2 +O2 2H2O
4 32
For Sulfur S + O2 SO2
32,1 32
34. EXCESS AIR COMBUSTION
Because of the inconsistent nature of solid waste, it is virtually imposible to combust
solid waste with stoichiometric amount of air. In practical, excess air must be used to
promote mixing and turbulence, thus ensuring that air can reach all parts of the waste.
The use of excess air for combustion affects the temperature and composition of
combustion products (known as flue gases).
As the percentage of excess air increases, the oxygen content of the flue gases
increases;the temperature of combustion decreases, thus the combustion air can be
used to control combustion temperature.
If T less than about 1450 F the emmision of odorous compounds may be occur. T more
than 1800 F minimize the emmision of dioxin, furan, VOCs, and other potentially
hazardous compounds in the flue gas.
35. ENERGY RECOVERY
All new combustors currently under construction in the US and Europe employ some
energy recovery to help offset operating costs and to reduce the capital cost of air
pollution control equipment.
Energy can be recovered by two methods:
1. The use of water wall combustion chamber
2. The use of waste heat boilers, or both.
Either hot water or steam can be generated. Hot water can be used for low
temperature industrial or space heating application. Steam is more versatile, as it can
be used for both heating and generating electricity.
36. ENERGY RECOVERY
Boiler
Steam
turbine
Gas to Stack Exhaust
ElectricityWaste
Air
Steam from shredded and classified solid wastes, or solid fuel pellets fired
directly in boiler, or from solid wastes mass fired in water wall boiler. With
mass fired units auxiliary fuel may be requiered
Schematic of energy recovery system using a steam turbine generator combination
37. VOLUME REDUCTION
The amount of residue remaining after combustion depends on the nature of the waste
to be combusted.
Component Range % by weight Typical % by weight
Partially burned or unburned
organic matter
3-10 5
Tin cans 10-25 18
Other iron and steel 6-15 10
Other metals 1-4 2
Glass 30-50 35
Ceramic, stones, bricks 2-8 5
Ash 10-35 25
Total 100
38. ISSUES IN THE IMPLEMENTATION OF COMBUSTION
FACILITIES
Sitting
combustors should be sited in remote locations where adequate
buffer zones surrounding the facility can be maintained. In many
communities, combustion facilities are located in the remote
locations within the city limits or landfill site.
Air Emmisions
The proper design of control emission is a critical part of the
design of combustion system. In some cases, the cost and
complexity of the environmental control are equal to or even
greater than the cost of the combustion facilities.
Disposal of Residues
Several solid residual are produced by combustion facilities,
including bottom ash, fly ash, and scrubber product. Management
of these solid residual is an integral part of the design of
combustion systems. Normally bottom ash is disposed by
landfilling.
Liquid Emmisions
1. wastewater from the ash removal facilities
2. effluent from wet scrubber
3. wastewater from pump seals, cleaning, flushing, and
general housekeeping activities
4. wastewater from treatment systems used to produce high
quality boiler water
5. cooling tower blowdown
6. Handling and disposal of these liquid emission are also
important parts of the design of combustion facilities.
39. Continous feed mass fired municipal combustor used for the production of energy from MSW
CONTINOUS FEED MASS FIRED MUNICIPAL
COMBUSTOR
40. CONTINOUS FEED MASS FIRED MUNICIPAL
COMBUSTOR
1. Unloading solid waste from collection trucks
2. Storage pit
3. Overhead crane
4. Feed charging chute
5. Furnace
6. Grate
7. Combustion chamber
8. Boiler
1. Turbine Generator
2. NOx control
3. Dry Srubber for SO2 and acid
Control
4. Baghause for PM removal
5. Induced draft fan
6. Stack for discharging of cleaned
gas
7. Residue hopper
8. Ash treatment facilities
41. TYPES OF COMBUSTORS
1. Mass Fired Combustor
Grates serves several functions, including the
movement of waste through the system, mixing
of the waste and injection of combustion air.
Many variations of grates are possible based
on reciprocating, rocking, or rotating elements.
42. TYPES OF COMBUSTORS
2. RDF Fired Combustor
RDF fired system can also be controlled more
effectively than a mass fired system because of the
more homogenous nature of RDF allowing better
combustion control and better performance of air
pollution control devices.
43. TYPES OF COMBUSTORS
3. Fluidized Bed Combustor
Fluidized Bed Combustor is quite versatile and can be
operated on a wide variety of fuel, including MSW,
sludge, coal, and numerous chemical wastes. The bed
material can be plain sand or limestone (CaCO3)
44. FACTORS AFFECTING COMBUSTION PROCESS
1. Mixing
Mixing between air and fuel is necessary to ensure complete combustion.
2. Air
Excess air can prevent the occurrence of incomplete combustion, because produced CO can react again
produces CO2
3. Temperature
The temperature must be maintained at a flame temperature of fuel, if not then the burning will stop or not
take place at all.
4. Time
Sufficient time is needed to make sure all the solid waste burn completely
5. Density
Sufficient density is required for continuity of combustion
45. PYROLISIS
Pyrolisis is a thermal processing of waste in the complete absence of oxygen. Pyrolisis
process consist of thermal cracking and condensation into gaseous, liquid and solid
fraction. Pyrolitic process is highly endothermic, requiring an external heat source. For
this reason the term destructive distillation is often used as an alternative term for
pyrolisis.
For cellulose C6H10O5 , followed is the representative pyrolisis reaction :
3(C6H10O5 ) 8H2O + C6H8O+2CO+2CO2+CH4+H2+7C
The liquid tar or oil compounds normally obtained are represented by the expression
C6H8O.
46. PYROLISIS
There are 3 major component fractions resulting from the pyrolisis process :
1. A gas stream, containing primarily hydrogen, methane, carbon monoxide,
carbondioxide, and other gases, depending on the organic characteristics of the
material being pyrolized.
2. A liquid fraction, consisting of a tar or oil stream containing acetic acid, acetone,
methanol, and complex oxygenated hydrocarbons. This liquid fraction can be
used as a synthetic fuel gas oil as a substitute for conventional fuel oil.
3. A char, consisting of almost pure carbon plus any inert material originally present
in the solid waste.
47. GAS COMPOSITION FOR PYROLISIS AS A FUNCTION
OF TEMPERATURE
Gas
Percent by volume
900 oF 1200o F 1500 F 1700 F
H2 5,56 16,58 28,55 32,48
CH4 12,43 15,91 13,73 10,45
CO 33,50 30,49 34,12 35,25
CO2 44,77 31,78 20,59 18,31
C2H4 0,45 2,18 2,24 2,43
C2H6 3,03 3,06 0,77 1,07
Adapted from Tchobanoglous p.628
48. OPERATIONAL PROBLEMS WITH MSW PYROLYSIS
SYSTEM
1. Failure of the front end system to meet purity specifications for aluminium and
glass, which affected the economics of the system.
2. Failure of the system to produce a saleable pyrolisis oil. The oil moisture content
was 52% not 14% like was predicted from the pilot plant. The incresed moisture
in the oil decreased the energy content to 3600 Btu/lb as compared to 9100
Btu/lb predicted by the pilot plant test.
Pyrolisis is still widely used as an industrial process for the production of charcoal from
wood, coke and coke gas from coal, and fuel gas and pitch from heavy petroleum
fraction
49. GASIFICATION SYSTEMS
Gasification is the general term used to describe the process of partial combustion in
which a fuel is deliberately combusted with less than stoichiometric air.
It is an energy-efficient technique for reducing the volume of solid waste and recovery
of energy. Essentially, the process involves partial combustion of a carbonaceous fuel
to generate a combustible fuel gas rich in CO, H2, some saturated hydrocarbon,
principally methane. The combustible fuel gas can then be combusted in an internal
combustion engine, gas turbine, or boiler under excess air condition.
50. GASIFICATION SYSTEMS
During the gasification process, five principal reactions occur :
1. C + O2 CO2 exothermic
2. C+H2O CO + H2 endothermic
3. C + CO2 2CO endothermic
4. C + 2H2 CH4 exothermic
5. CO + H2O CO2 + H2 exothermic
The heat to sustain the process is derived from exothermic reactions, whereas the combustible
components are primarily generated by endothermic reactions.
Principal difference between pyrolisis and gasification is that pyrolisis system use an external
source of heat to drive the endotermic pyrolisis reactions in an oxygen free environment,
whereas gasification systems are self sustaining and use air or oxygen for the partial
combustion of solid waste.
51. GASIFICATION AIR EMISSIONS
Emission Unit Values
NO2 ppmv 60-115
SO2 Gr/dscm 0,091-0,227
Noncondensible Hydrocarbon ppmv < 1
Total particle rate Gr/dscm 0,068-0,164
Particle cut diameter µm 8
ppmv : part per million by volume
Gr/dscm : grams per dry standart cubic meter
52. GASIFIER TYPES
There are five basic types of gasifiers :
1. Vertical fixed bed
2. Horizontal fixed bed
3. Fluidized bed
4. Multiple heart
5. Rotary Kiln
The first three types have been the most widely used.
53. VERTICAL FIXED BED
Some advantages of this type is simplicity and
relatively low capital costs. However Vertical
Fixed Bed is more sensitive to the mechanical
character of the fuel, it requires a uniform,
homogenous fuel, such as densified RDF.
Direction of
fuel flow
Air
Air
Grate
Gas
Ash
Air
removal
pot
Schematic diagram of batch fed fixed
bed gasifier
54. HORIZONTAL FIXED BED
The Horizontal Fixed Bed gasifier has become the most commercial available type. Ironically, it
is not commonly reffered to as a gasifier but rather by terms starved air combustor
(incinerator), or pyrolytic combustor.
Normally Horizontal Fixed Bed consists of a primary combustion chamber and a secondary
combustion chamber.
In the primary chamber, waste is gasified by partial combustion under substoichiometric
conditions, producing a low Btu gas, which then flows into the secondary combustion chamber
where it is combusted with excess air.
Lower velocity and turbulence in the primary combustion chamber minimize the entrainment of
particulates in the gas stream, leading to lower particulate emissions than in conventional excess
air combustion.
The secondary combustion produces high temperature (1200 to 1600 oF) gases of complete
combustion (CO2, H2O, N2), which can be used to produce steam or hot water in an attached
waste heat boiler.
55. FLUIDIZED BED
The use of fluidized bed combustion for the excess air combustion of MSW has been
discussed previously. With minimal modifications a fludized bed combustion system can
be operated in substoichiometric mode as a gasifier.
56. TUGAS 1 – (KELOMPOK) DISKUSI TENTANG JENIS
SAMPAH
Identifikasi semua jenis sampah berpotensi non-B3 dan B-3 yang terdapat di (pilih 1 lokasi spesifik):
1. Rumah
2. Kos-kosan
3. Atau dimanapun
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