013_38S1286
•
0 likes•162 views
This project developed mathematical models for removing nitrates from wastewater using bagasse ash, a byproduct of the sugar industry. Experiments were conducted to test bagasse ash and activated carbon as adsorbents. Samples were taken over time to analyze how nitrate concentration decreased with different adsorbent doses and initial concentrations. The results showed that both adsorbents effectively removed nitrates, with maximum removal occurring at a 20 gm dose. Bagasse ash was determined to be a good, low-cost adsorbent for nitrate removal. Future work could optimize removal by studying the effects of pH, stirring rate, and temperature on the adsorption process.
Report
Share
Report
Share
Download to read offline
Recommended
A Novel Process for Biological Nitrogen Removal from Dairy Wastewater in Cons...
The document presents research on using anammox bacteria to remove nitrogen from dairy wastewater in constructed wetlands. The objectives were to enrich anammox bacteria in phase I and seed wetland systems in phase II. Two filter systems with different media sizes were built and showed no significant difference in total nitrogen removal. Ammonia and nitrite decreased while nitrate accumulated over time, indicating partial nitrification and anammox activity. More data is needed to better understand the nitrogen removal processes.
Determination of nitrate in polluted water with new coupling reagent hydroxam...
This document describes a new rapid and sensitive spectrophotometric method for determining nitrate levels in polluted water samples using hydroxamic acids as coupling reagents. The method involves reacting hydroxamic acids with nitrate in concentrated sulfuric acid to form colored complexes, which are extracted with n-hexane. Calibration curves for three hydroxamic acids showed good linearity for nitrate detection down to picogram levels. The method was found to be accurate, stable, and tolerant of many interfering ions. It was successfully applied to analyze nitrate levels in water samples from various sites in Bhopal, India.
I41016172
1. The document describes the green synthesis of silver nanoparticles using the leaf extract of Ficus Elastica and their application in controlling air pollution.
2. Silver nanoparticles were synthesized using a microwave-mediated method with Ficus Elastica leaf extract. The nanoparticles were characterized using UV-Vis spectroscopy, SEM, and FTIR.
3. Batch experiments were conducted to study the removal of SO2 from aqueous solutions using the synthesized silver nanoparticles. The effect of contact time, initial SO2 concentration, nanoparticle dosage, and temperature were evaluated. Kinetic and adsorption models were applied to the experimental data.
Treatment of Pretreated Landfill Leachate by Membrane Bioreactor Process
The document summarizes a study on treating landfill leachate using coagulation and a membrane bioreactor (MBR) process.
1) Coagulation using alum achieved the highest removal rate of 94.9% at a dosage of 160 mg/L. However, the effluent quality did not meet standards for discharge.
2) The leachate was then treated with an MBR system at an optimum hydraulic retention time of 5 days. After MBR treatment, all parameters except biochemical oxygen demand met relevant Indian standards for irrigation water discharge.
3) The MBR process improved removal rates compared to coagulation alone. Removal rates increased to 85-95% for most parameters like
Industrial wastewater treatment via photocatalysis
This document discusses using photocatalysis for industrial wastewater treatment. Specifically, it examines using ZnO nanoparticles as a photocatalyst coated on a support material. An experimental setup involved circulating 1.5 liters of textile wastewater through a ZnO coated reactor for 4 hours under solar radiation. Various parameters that affect the wastewater treatment were studied, including temperature, dye concentration, reaction time, pH and TOC variation over time. Results showed ZnO was more effective than TiO2 at degrading pollutants like COD. However, issues with ZnO include photocorrosion and difficulty recovering the nanoparticles from water. Overall, photocatalysis shows potential as a green technology for treating industrial wastewater
Solar photocatalysis
Solar Photocatalysis a green and novel technology for wastewater treatment. It is a sustainable way to harvest solar energy for treatment of wastewater at a lower cost thus helping in achieving some of the Sustainable Development Goals(i.e. Good Health and Wellbeing).
This is based on the advanced oxidation process i.e. generation of reactive oxygen species which can help in the degradation of pollutants
Anammox Process for Nitrogen Removal from Wastewater
This document summarizes information about the anammox process for nitrogen removal from wastewater. It describes the discovery and principle of anammox, including the chemical and biochemical reaction models. Applications of anammox include the SHARON-ANAMMOX and CANON ANAMMOX processes. Problems with anammox include long start-up times and inhibition by organic carbon. Solutions discussed are the HABR reactor design and optimization approaches like controlling temperature, dissolved oxygen, and organic carbon levels.
Anoxic Selector Single Stage Nitrification Process Waste Water Plant Theory a...
Texas Commission on Environmental Quality (TCEQ) Annual Water Quality Training Conference. Practical application of Nitrification and Denitrification at a new or existing wastewater treatment plant (WWTP). Principles and Theory.
Recommended
A Novel Process for Biological Nitrogen Removal from Dairy Wastewater in Cons...
The document presents research on using anammox bacteria to remove nitrogen from dairy wastewater in constructed wetlands. The objectives were to enrich anammox bacteria in phase I and seed wetland systems in phase II. Two filter systems with different media sizes were built and showed no significant difference in total nitrogen removal. Ammonia and nitrite decreased while nitrate accumulated over time, indicating partial nitrification and anammox activity. More data is needed to better understand the nitrogen removal processes.
Determination of nitrate in polluted water with new coupling reagent hydroxam...
This document describes a new rapid and sensitive spectrophotometric method for determining nitrate levels in polluted water samples using hydroxamic acids as coupling reagents. The method involves reacting hydroxamic acids with nitrate in concentrated sulfuric acid to form colored complexes, which are extracted with n-hexane. Calibration curves for three hydroxamic acids showed good linearity for nitrate detection down to picogram levels. The method was found to be accurate, stable, and tolerant of many interfering ions. It was successfully applied to analyze nitrate levels in water samples from various sites in Bhopal, India.
I41016172
1. The document describes the green synthesis of silver nanoparticles using the leaf extract of Ficus Elastica and their application in controlling air pollution.
2. Silver nanoparticles were synthesized using a microwave-mediated method with Ficus Elastica leaf extract. The nanoparticles were characterized using UV-Vis spectroscopy, SEM, and FTIR.
3. Batch experiments were conducted to study the removal of SO2 from aqueous solutions using the synthesized silver nanoparticles. The effect of contact time, initial SO2 concentration, nanoparticle dosage, and temperature were evaluated. Kinetic and adsorption models were applied to the experimental data.
Treatment of Pretreated Landfill Leachate by Membrane Bioreactor Process
The document summarizes a study on treating landfill leachate using coagulation and a membrane bioreactor (MBR) process.
1) Coagulation using alum achieved the highest removal rate of 94.9% at a dosage of 160 mg/L. However, the effluent quality did not meet standards for discharge.
2) The leachate was then treated with an MBR system at an optimum hydraulic retention time of 5 days. After MBR treatment, all parameters except biochemical oxygen demand met relevant Indian standards for irrigation water discharge.
3) The MBR process improved removal rates compared to coagulation alone. Removal rates increased to 85-95% for most parameters like
Industrial wastewater treatment via photocatalysis
This document discusses using photocatalysis for industrial wastewater treatment. Specifically, it examines using ZnO nanoparticles as a photocatalyst coated on a support material. An experimental setup involved circulating 1.5 liters of textile wastewater through a ZnO coated reactor for 4 hours under solar radiation. Various parameters that affect the wastewater treatment were studied, including temperature, dye concentration, reaction time, pH and TOC variation over time. Results showed ZnO was more effective than TiO2 at degrading pollutants like COD. However, issues with ZnO include photocorrosion and difficulty recovering the nanoparticles from water. Overall, photocatalysis shows potential as a green technology for treating industrial wastewater
Solar photocatalysis
Solar Photocatalysis a green and novel technology for wastewater treatment. It is a sustainable way to harvest solar energy for treatment of wastewater at a lower cost thus helping in achieving some of the Sustainable Development Goals(i.e. Good Health and Wellbeing).
This is based on the advanced oxidation process i.e. generation of reactive oxygen species which can help in the degradation of pollutants
Anammox Process for Nitrogen Removal from Wastewater
This document summarizes information about the anammox process for nitrogen removal from wastewater. It describes the discovery and principle of anammox, including the chemical and biochemical reaction models. Applications of anammox include the SHARON-ANAMMOX and CANON ANAMMOX processes. Problems with anammox include long start-up times and inhibition by organic carbon. Solutions discussed are the HABR reactor design and optimization approaches like controlling temperature, dissolved oxygen, and organic carbon levels.
Anoxic Selector Single Stage Nitrification Process Waste Water Plant Theory a...
Texas Commission on Environmental Quality (TCEQ) Annual Water Quality Training Conference. Practical application of Nitrification and Denitrification at a new or existing wastewater treatment plant (WWTP). Principles and Theory.
Anoxic treatment systems
Proses Pengolahan Limbah antara fase anaerob dan aerob, dimana proses anoxic untuk menghilangkan nitrite
Bickle, Bury, Laird hydrogen sulfide
This document describes a study that used a photosynthetic bioreactor with the green bacteria Prosthecochloris aestuarii to remove hydrogen sulfide from a pond. A STELLA model was created based on past studies to simulate the bioreactor. The model showed about 80% reduction of hydrogen sulfide concentration, from 0.02903 mmol/L initially to 0.006 mmol/L in the effluent, by using a light intensity of 25 W/m2 and initial biomass of 0.16 g. The study concluded that this approach could yield up to 80% hydrogen sulfide reduction from the pond water with elemental sulfur as a recoverable byproduct.
Advanced photo catalytic oxidation(wastewater)
1) Advanced photocatalytic oxidation is an innovative wastewater treatment technology that uses oxidation processes like TiO2 photocatalysis, ozonisation, UV disinfection, and hydrogen peroxide to break down organic pollutants into less hazardous molecules.
2) These advanced oxidation processes generate hydroxyl radicals that mineralize pollutants. Photocatalytic degradation occurs when UV light activates a photocatalyst like TiO2 to produce hydroxyl radicals to oxidize pollutants.
3) An advanced photocatalytic oxidation process plant was installed at a Danish wastewater treatment plant to treat 50,000 person equivalents using UV lamps and dispersing systems with oxidants.
Puralytics® activated TiO2 Nanotechnology (sunlight-only) for Photocatalytics...
Puralytics® activated TiO2 Nanotechnology (sunlight-only) for Photocatalytics...M.H. Chew & Associates, Inc. (CAI) www,MHChew.com
Puralytics is a startup company founded in 2007 that develops light-activated nanotechnology for water purification. Their technology uses LEDs or sunlight to excite a nanotechnology-coated mesh, which then kills pathogens, destroys chemicals, adsorbs heavy metals, and purifies water through 5 light-activated processes. Their products include the Shield 500 water purification system, SolarBag personal water purifier, and LilyPad system for treating stormwater runoff. Studies show the LilyPad is effective at reducing various contaminants like pharmaceuticals, pesticides, and petrochemicals in stormwater through natural sunlight.Treatment Technologies for Ammonia in Liquid Manure: Nitrification/denitrific...
This document summarizes research on biological nitrogen removal technologies for liquid livestock manure, including nitrification/denitrification and deammonification processes. It describes the operation of full-scale systems in North Carolina that achieved over 90% removal of ammonia and total nitrogen using nitrification/denitrification. It also discusses single-tank deammonification reactors that removed ammonia from swine wastewater with 100% efficiency while reducing aeration needs by 57% compared to traditional methods. The research isolated specialized bacteria that enabled these nitrogen removal processes to work efficiently even at low temperatures.
Removal of arsenic (v) from water by adsorption onto low cost and waste mater...
Removal of arsenic (v) from water by adsorption onto low cost and waste mater...eSAT Publishing House
This document summarizes a study that investigated using low-cost materials like cast iron filings and steel wool to remove arsenic from water. Batch adsorption experiments showed these materials could remove 90-95% of arsenic at favorable pH levels. Equilibrium data fit the Langmuir isotherm model, indicating monolayer adsorption on a homogeneous surface. Column and candle filter studies demonstrated these materials' potential for engineering applications to remove arsenic to acceptable levels from drinking water. The materials showed good regeneration and were not found to leach iron into the treated water.Nano clean up
Nanotechnologies show potential for environmental cleanup through remediation of contaminated groundwater and soil. Specifically, injecting nanoparticles containing zero-valent iron (nZVI) underground can degrade pollutants in situ. However, the nZVI used is larger than true nanoparticles and behaves more like environmental colloids than nanoparticles. Its reactivity comes from high surface area rather than nanoscale effects, and it has limited mobility underground of only a few meters. More research is still needed to understand how nZVI transforms over time and impacts the environment.
Removal of Polyaromatic Hydrocarbons from Water
ABSTRACT: Unsaturated cyclic aromatic compounds that are present at high concentrations in the crude oil, are including benzene, toluene and xylene. They can be an important source of water pollution. Benzo pyrene indicate the presence of these compounds in contaminated water into the environment. These compounds into the environment as a result of incomplete combustion of fossil fuels as a source of natural or man-made. These compounds are highly carcinogenic effects that enter the body through the air or food will be available. The use of columns filled with water from organic absorbent material is highly effective in removing the material. The use of nanoparticles for the removal of these contaminants is very appropriate that these coatings use to extract and measure the batch of hydrocarbons and polycyclic aromatic of samples of contaminated water. The Nanocomposites can be produced easily and in addition to longevity of good stability as well. Zeolite nanoparticles and carbon nanotubes are from other suitable methods. Carbon nanotubes are a lot of electrons on the surface that can be paired with aromatic pollution. The aromatics as electron acceptor and electron donor sheets of graphene to act as the effective removal of aromatic pollutants play an important role. In this paper the Titania in photocatalytic process use to remove contaminants to harmless by-products and recycling is much better than other known methods.The Cyclodextrin Mesostructured Silica Nanoparticles and magnetic Nano particle are suitable to remove PAHs from water resources too that is very simple to use. Hope that using the nanoparticles have a big change in removal of water and sanitation
Removal of heavy metals from tannery effluent using Acacia nilotica and Solan...
This is done to reduce heavy metals ions such as Cr(VI), Cd(II), Ni, from tannery waste water. The removal is done by using natural adsorbents which are inexpensive and plentily available.
Enhanced Arsenic Removal from Groundwater by Using an Advance Adsorbent - Fer...
This presentation is part of the ProSPER.Net Young Researchers' School 2017 ‘Water Security for Sustainable Development in a Changing Climate’.
Think Science: Nanotechnology; Heather Shipley, UTSA
Slides from Dr. Heather Shipley's presentation at TPR's Think Science event on Friday, November 16, 2018.
SODIS
This master's thesis examined methods for improving solar water disinfection (SODIS) using zinc oxide (ZnO) and titanium dioxide (TiO2) nanoparticles. Testing showed that adding 0.01g/L of ZnO or TiO2 accelerated bacterial coliform inactivation, with TiO2 working faster than ZnO. Using nanoparticles also prevented bacterial re-growth for up to 7 days, unlike standard SODIS. The study demonstrated the potential for low-cost water treatment and identified opportunities to further enhance SODIS effectiveness, such as using different nanoparticle sizes and coating bottles.
Atrazine poster ppt
This document summarizes a study on the design of aqueous phase advanced oxidation processes (AOPs) for removing the herbicide atrazine from water. It introduces three common AOP techniques: ozonation, ozonation with hydrogen peroxide, and UV light with hydrogen peroxide. The document examines these AOPs using a simplified pseudo steady state reactor model to compare performance of five ideal reactor designs. It finds that the completely mixed batch reactor achieved the treatment goal of reducing atrazine concentration to below 0.003 mg/L and performed better than the other reactor models tested.
Masters Thesis progress
This thesis investigates the potential of microalgae species to biodegrade reactive blue dye. The study aims to identify dominant microalgae species in Bahir Dar, Ethiopia and examine their ability to degrade dye under different conditions. The methodology involves growing microalgae in culture media, identifying the predominant species, and conducting experiments to determine the effect of culturing medium, substrate concentration, and contact time on dye degradation. Preliminary results found the dominant microalgae species to be Scenedesmus sp., Chlorella sp., Synedra sp., and Achnanthidium sp. Growth curves showed higher biomass concentration when cultured in BBM medium compared to BG-11 medium. Further analysis of dye
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
1) The study evaluated using ozonation-biological aerated filter (O3-BAF) treatment to remove contaminants from secondary effluent from a petrochemical wastewater treatment plant.
2) Ozonation was found to degrade organic matter into smaller, more biodegradable compounds that could be further treated by biological filtration.
3) The O3-BAF process removed approximately 63% of organic contaminants and over 85% of genotoxicity from the secondary effluent, showing it is an effective advanced treatment method.
Low Cost Design of Arsenic Removal from Groundwater in Bangladesh
Low-Cost Design of Arsenic Removal from Groundwater
Jeremy Kozub*, Kevin Banahan*, Jesse Amsel*
*Wentworth Institute of Technology, Environmental Engineering Program, Class of 2005 (Jack Duggan, Ph.D., P.E., faculty advisor)
For this project, a student team designed and evaluated treatment alternatives for the removal of arsenic from groundwater used in developing countries. The application of sorption technologies was evaluated using bench-scale testing of a range of sorption materials, support media and differing contact geometries. Sorption capacity of treatment units were designed to accommodate the daily consumption of individual families using a community well in Bangladesh.
Until the early 1990's, there was little awareness that groundwater in Bangladesh contained high levels of arsenic. The adverse health affects of chronic exposure to arsenic are well documented. Although current technologies to treat arsenic in groundwater exist, there are economic, social and cultural factors that prevent these technologies from being used in Bangladesh. This project focused on developing a low-cost alternative technology that could be readily assembled and implemented by local villagers.
As a capstone project for the environmental engineering program at Wentworth of Technology, this project has been performed by three students under the supervision of a faculty advisor. Students applied previous coursework in the areas of economics, engineering theory and application, design, communication skills and ethical principles to complete this project. The project was performed in collaboration with external non-profit and non-governmental organizations. The goal of this project is to further develop the creation of a low-cost system that will become available to large populations of those in need.
Ppt
The document discusses the application of a fluidized bed reactor coupled with advanced oxidation processes for wastewater treatment. It begins with an introduction on the need for improved wastewater treatment methods due to increasing water demand and limits on wastewater discharge. It then covers advanced oxidation processes like Fenton oxidation and photocatalytic oxidation that use hydroxyl radicals to break down pollutants. A fluidized bed reactor provides advantages like improved contact between pollutants and catalyst. Factors affecting the fluidized bed behavior are also examined. In conclusion, using a fluidized bed reactor with advanced oxidation processes can increase degradation rates, address drawbacks of conventional methods, and provide an efficient wastewater treatment approach.
Nanotechnology in waste water treatment
This document discusses the use of nanotechnology for wastewater treatment. It notes that over 75% of the Earth is covered in water, but less than 1% is accessible freshwater for human use. Nanomaterials like dendrimers, metal nanoparticles, zeolites and carbon nanotubes can be used for wastewater treatment through processes like nanosorption, nanofiltration and photocatalysis. These nanomaterials have advantages over conventional treatment methods like higher efficiency and capacity. However, scaling up nanotechnology for wastewater treatment remains a challenge.
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
This document summarizes research on treating secondary effluent from a petrochemical wastewater treatment plant using an ozonation-biological aerated filter (O3-BAF) process. The objectives were to develop an advanced treatment technology using ozonation to increase biodegradability and reduce costs and genotoxicity. Researchers found that ozonation degraded organics into simpler compounds, removing 37% of DOC on its own and up to 63% total when combined with BAF. The O3-BAF process proved suitable for treating petrochemical secondary effluent by changing organic molecular sizes, increasing biodegradability, and reducing genotoxicity. However, the author notes the process may only
TiO2 and ZnO as Heterogeneous Photocatalysts for Wastewater Treatment
This document discusses the use of TiO2 and ZnO as heterogeneous photocatalysts for wastewater treatment. It begins with an introduction stating that industrial effluents cause environmental pollution and dyes from textile industries are toxic and difficult to degrade. It then provides details on the Z-scheme and heterojunction mechanisms for combining multiple photocatalysts to more effectively treat wastewater using solar light. The key advantages of these photocatalytic advanced oxidation processes are that they can mineralize organic pollutants under mild conditions and use solar energy.
Colortheory
The document discusses color theory and color wheel principles. It defines primary, secondary, tertiary, warm, cool colors. It explains how to create tints and shades using black and white. Color schemes like monochromatic, complementary, split-complementary and analogous are described. Key elements of hue, chroma, tone and achromatic colors are also summarized. Examples of paintings using different color schemes are provided.
0 matematica aplicada introduccion 0
Este documento presenta conceptos básicos de lógica y matemática aplicada. Explica que la lógica estudia la validez de los argumentos y define conceptos como proposiciones, enunciados, tautologías, contradicciones y conectivos lógicos como la negación, conjunción y disyunción. También introduce las tablas de verdad como una forma de determinar el valor de verdad de enunciados compuestos en función del valor de sus enunciados simples.
More Related Content
What's hot
Anoxic treatment systems
Proses Pengolahan Limbah antara fase anaerob dan aerob, dimana proses anoxic untuk menghilangkan nitrite
Bickle, Bury, Laird hydrogen sulfide
This document describes a study that used a photosynthetic bioreactor with the green bacteria Prosthecochloris aestuarii to remove hydrogen sulfide from a pond. A STELLA model was created based on past studies to simulate the bioreactor. The model showed about 80% reduction of hydrogen sulfide concentration, from 0.02903 mmol/L initially to 0.006 mmol/L in the effluent, by using a light intensity of 25 W/m2 and initial biomass of 0.16 g. The study concluded that this approach could yield up to 80% hydrogen sulfide reduction from the pond water with elemental sulfur as a recoverable byproduct.
Advanced photo catalytic oxidation(wastewater)
1) Advanced photocatalytic oxidation is an innovative wastewater treatment technology that uses oxidation processes like TiO2 photocatalysis, ozonisation, UV disinfection, and hydrogen peroxide to break down organic pollutants into less hazardous molecules.
2) These advanced oxidation processes generate hydroxyl radicals that mineralize pollutants. Photocatalytic degradation occurs when UV light activates a photocatalyst like TiO2 to produce hydroxyl radicals to oxidize pollutants.
3) An advanced photocatalytic oxidation process plant was installed at a Danish wastewater treatment plant to treat 50,000 person equivalents using UV lamps and dispersing systems with oxidants.
Puralytics® activated TiO2 Nanotechnology (sunlight-only) for Photocatalytics...
Puralytics® activated TiO2 Nanotechnology (sunlight-only) for Photocatalytics...M.H. Chew & Associates, Inc. (CAI) www,MHChew.com
Puralytics is a startup company founded in 2007 that develops light-activated nanotechnology for water purification. Their technology uses LEDs or sunlight to excite a nanotechnology-coated mesh, which then kills pathogens, destroys chemicals, adsorbs heavy metals, and purifies water through 5 light-activated processes. Their products include the Shield 500 water purification system, SolarBag personal water purifier, and LilyPad system for treating stormwater runoff. Studies show the LilyPad is effective at reducing various contaminants like pharmaceuticals, pesticides, and petrochemicals in stormwater through natural sunlight.Treatment Technologies for Ammonia in Liquid Manure: Nitrification/denitrific...
This document summarizes research on biological nitrogen removal technologies for liquid livestock manure, including nitrification/denitrification and deammonification processes. It describes the operation of full-scale systems in North Carolina that achieved over 90% removal of ammonia and total nitrogen using nitrification/denitrification. It also discusses single-tank deammonification reactors that removed ammonia from swine wastewater with 100% efficiency while reducing aeration needs by 57% compared to traditional methods. The research isolated specialized bacteria that enabled these nitrogen removal processes to work efficiently even at low temperatures.
Removal of arsenic (v) from water by adsorption onto low cost and waste mater...
Removal of arsenic (v) from water by adsorption onto low cost and waste mater...eSAT Publishing House
This document summarizes a study that investigated using low-cost materials like cast iron filings and steel wool to remove arsenic from water. Batch adsorption experiments showed these materials could remove 90-95% of arsenic at favorable pH levels. Equilibrium data fit the Langmuir isotherm model, indicating monolayer adsorption on a homogeneous surface. Column and candle filter studies demonstrated these materials' potential for engineering applications to remove arsenic to acceptable levels from drinking water. The materials showed good regeneration and were not found to leach iron into the treated water.Nano clean up
Nanotechnologies show potential for environmental cleanup through remediation of contaminated groundwater and soil. Specifically, injecting nanoparticles containing zero-valent iron (nZVI) underground can degrade pollutants in situ. However, the nZVI used is larger than true nanoparticles and behaves more like environmental colloids than nanoparticles. Its reactivity comes from high surface area rather than nanoscale effects, and it has limited mobility underground of only a few meters. More research is still needed to understand how nZVI transforms over time and impacts the environment.
Removal of Polyaromatic Hydrocarbons from Water
ABSTRACT: Unsaturated cyclic aromatic compounds that are present at high concentrations in the crude oil, are including benzene, toluene and xylene. They can be an important source of water pollution. Benzo pyrene indicate the presence of these compounds in contaminated water into the environment. These compounds into the environment as a result of incomplete combustion of fossil fuels as a source of natural or man-made. These compounds are highly carcinogenic effects that enter the body through the air or food will be available. The use of columns filled with water from organic absorbent material is highly effective in removing the material. The use of nanoparticles for the removal of these contaminants is very appropriate that these coatings use to extract and measure the batch of hydrocarbons and polycyclic aromatic of samples of contaminated water. The Nanocomposites can be produced easily and in addition to longevity of good stability as well. Zeolite nanoparticles and carbon nanotubes are from other suitable methods. Carbon nanotubes are a lot of electrons on the surface that can be paired with aromatic pollution. The aromatics as electron acceptor and electron donor sheets of graphene to act as the effective removal of aromatic pollutants play an important role. In this paper the Titania in photocatalytic process use to remove contaminants to harmless by-products and recycling is much better than other known methods.The Cyclodextrin Mesostructured Silica Nanoparticles and magnetic Nano particle are suitable to remove PAHs from water resources too that is very simple to use. Hope that using the nanoparticles have a big change in removal of water and sanitation
Removal of heavy metals from tannery effluent using Acacia nilotica and Solan...
This is done to reduce heavy metals ions such as Cr(VI), Cd(II), Ni, from tannery waste water. The removal is done by using natural adsorbents which are inexpensive and plentily available.
Enhanced Arsenic Removal from Groundwater by Using an Advance Adsorbent - Fer...
This presentation is part of the ProSPER.Net Young Researchers' School 2017 ‘Water Security for Sustainable Development in a Changing Climate’.
Think Science: Nanotechnology; Heather Shipley, UTSA
Slides from Dr. Heather Shipley's presentation at TPR's Think Science event on Friday, November 16, 2018.
SODIS
This master's thesis examined methods for improving solar water disinfection (SODIS) using zinc oxide (ZnO) and titanium dioxide (TiO2) nanoparticles. Testing showed that adding 0.01g/L of ZnO or TiO2 accelerated bacterial coliform inactivation, with TiO2 working faster than ZnO. Using nanoparticles also prevented bacterial re-growth for up to 7 days, unlike standard SODIS. The study demonstrated the potential for low-cost water treatment and identified opportunities to further enhance SODIS effectiveness, such as using different nanoparticle sizes and coating bottles.
Atrazine poster ppt
This document summarizes a study on the design of aqueous phase advanced oxidation processes (AOPs) for removing the herbicide atrazine from water. It introduces three common AOP techniques: ozonation, ozonation with hydrogen peroxide, and UV light with hydrogen peroxide. The document examines these AOPs using a simplified pseudo steady state reactor model to compare performance of five ideal reactor designs. It finds that the completely mixed batch reactor achieved the treatment goal of reducing atrazine concentration to below 0.003 mg/L and performed better than the other reactor models tested.
Masters Thesis progress
This thesis investigates the potential of microalgae species to biodegrade reactive blue dye. The study aims to identify dominant microalgae species in Bahir Dar, Ethiopia and examine their ability to degrade dye under different conditions. The methodology involves growing microalgae in culture media, identifying the predominant species, and conducting experiments to determine the effect of culturing medium, substrate concentration, and contact time on dye degradation. Preliminary results found the dominant microalgae species to be Scenedesmus sp., Chlorella sp., Synedra sp., and Achnanthidium sp. Growth curves showed higher biomass concentration when cultured in BBM medium compared to BG-11 medium. Further analysis of dye
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
1) The study evaluated using ozonation-biological aerated filter (O3-BAF) treatment to remove contaminants from secondary effluent from a petrochemical wastewater treatment plant.
2) Ozonation was found to degrade organic matter into smaller, more biodegradable compounds that could be further treated by biological filtration.
3) The O3-BAF process removed approximately 63% of organic contaminants and over 85% of genotoxicity from the secondary effluent, showing it is an effective advanced treatment method.
Low Cost Design of Arsenic Removal from Groundwater in Bangladesh
Low-Cost Design of Arsenic Removal from Groundwater
Jeremy Kozub*, Kevin Banahan*, Jesse Amsel*
*Wentworth Institute of Technology, Environmental Engineering Program, Class of 2005 (Jack Duggan, Ph.D., P.E., faculty advisor)
For this project, a student team designed and evaluated treatment alternatives for the removal of arsenic from groundwater used in developing countries. The application of sorption technologies was evaluated using bench-scale testing of a range of sorption materials, support media and differing contact geometries. Sorption capacity of treatment units were designed to accommodate the daily consumption of individual families using a community well in Bangladesh.
Until the early 1990's, there was little awareness that groundwater in Bangladesh contained high levels of arsenic. The adverse health affects of chronic exposure to arsenic are well documented. Although current technologies to treat arsenic in groundwater exist, there are economic, social and cultural factors that prevent these technologies from being used in Bangladesh. This project focused on developing a low-cost alternative technology that could be readily assembled and implemented by local villagers.
As a capstone project for the environmental engineering program at Wentworth of Technology, this project has been performed by three students under the supervision of a faculty advisor. Students applied previous coursework in the areas of economics, engineering theory and application, design, communication skills and ethical principles to complete this project. The project was performed in collaboration with external non-profit and non-governmental organizations. The goal of this project is to further develop the creation of a low-cost system that will become available to large populations of those in need.
Ppt
The document discusses the application of a fluidized bed reactor coupled with advanced oxidation processes for wastewater treatment. It begins with an introduction on the need for improved wastewater treatment methods due to increasing water demand and limits on wastewater discharge. It then covers advanced oxidation processes like Fenton oxidation and photocatalytic oxidation that use hydroxyl radicals to break down pollutants. A fluidized bed reactor provides advantages like improved contact between pollutants and catalyst. Factors affecting the fluidized bed behavior are also examined. In conclusion, using a fluidized bed reactor with advanced oxidation processes can increase degradation rates, address drawbacks of conventional methods, and provide an efficient wastewater treatment approach.
Nanotechnology in waste water treatment
This document discusses the use of nanotechnology for wastewater treatment. It notes that over 75% of the Earth is covered in water, but less than 1% is accessible freshwater for human use. Nanomaterials like dendrimers, metal nanoparticles, zeolites and carbon nanotubes can be used for wastewater treatment through processes like nanosorption, nanofiltration and photocatalysis. These nanomaterials have advantages over conventional treatment methods like higher efficiency and capacity. However, scaling up nanotechnology for wastewater treatment remains a challenge.
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
This document summarizes research on treating secondary effluent from a petrochemical wastewater treatment plant using an ozonation-biological aerated filter (O3-BAF) process. The objectives were to develop an advanced treatment technology using ozonation to increase biodegradability and reduce costs and genotoxicity. Researchers found that ozonation degraded organics into simpler compounds, removing 37% of DOC on its own and up to 63% total when combined with BAF. The O3-BAF process proved suitable for treating petrochemical secondary effluent by changing organic molecular sizes, increasing biodegradability, and reducing genotoxicity. However, the author notes the process may only
TiO2 and ZnO as Heterogeneous Photocatalysts for Wastewater Treatment
This document discusses the use of TiO2 and ZnO as heterogeneous photocatalysts for wastewater treatment. It begins with an introduction stating that industrial effluents cause environmental pollution and dyes from textile industries are toxic and difficult to degrade. It then provides details on the Z-scheme and heterojunction mechanisms for combining multiple photocatalysts to more effectively treat wastewater using solar light. The key advantages of these photocatalytic advanced oxidation processes are that they can mineralize organic pollutants under mild conditions and use solar energy.
What's hot (20)
Puralytics® activated TiO2 Nanotechnology (sunlight-only) for Photocatalytics...
Puralytics® activated TiO2 Nanotechnology (sunlight-only) for Photocatalytics...
Treatment Technologies for Ammonia in Liquid Manure: Nitrification/denitrific...
Treatment Technologies for Ammonia in Liquid Manure: Nitrification/denitrific...
Removal of arsenic (v) from water by adsorption onto low cost and waste mater...
Removal of arsenic (v) from water by adsorption onto low cost and waste mater...
Removal of heavy metals from tannery effluent using Acacia nilotica and Solan...
Removal of heavy metals from tannery effluent using Acacia nilotica and Solan...
Enhanced Arsenic Removal from Groundwater by Using an Advance Adsorbent - Fer...
Enhanced Arsenic Removal from Groundwater by Using an Advance Adsorbent - Fer...
Think Science: Nanotechnology; Heather Shipley, UTSA
Think Science: Nanotechnology; Heather Shipley, UTSA
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
Low Cost Design of Arsenic Removal from Groundwater in Bangladesh
Low Cost Design of Arsenic Removal from Groundwater in Bangladesh
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
Treatment of secondary effluent from a petrochemical wastewater treatment pla...
TiO2 and ZnO as Heterogeneous Photocatalysts for Wastewater Treatment
TiO2 and ZnO as Heterogeneous Photocatalysts for Wastewater Treatment
Viewers also liked
Colortheory
The document discusses color theory and color wheel principles. It defines primary, secondary, tertiary, warm, cool colors. It explains how to create tints and shades using black and white. Color schemes like monochromatic, complementary, split-complementary and analogous are described. Key elements of hue, chroma, tone and achromatic colors are also summarized. Examples of paintings using different color schemes are provided.
0 matematica aplicada introduccion 0
Este documento presenta conceptos básicos de lógica y matemática aplicada. Explica que la lógica estudia la validez de los argumentos y define conceptos como proposiciones, enunciados, tautologías, contradicciones y conectivos lógicos como la negación, conjunción y disyunción. También introduce las tablas de verdad como una forma de determinar el valor de verdad de enunciados compuestos en función del valor de sus enunciados simples.
laporan penginderaan jauh tahap 5
laporan penginderaan jauh tahap 508' geografi di universitas negeri gorontalo_next '13 geografi di universitas negeri makassar
laporan penginderaan jauh tahap1Yarn flowers
Flowers come in a variety of colors, shapes, and sizes. They are enjoyed for their beauty and fragrance. Many flowers are cut and arranged for decoration or given as gifts to show appreciation.
Genre
Genre refers to a style or category of media product. It is developed through the use of consistent elements like protagonists, stock characters, predictable plot situations, icons, backgrounds, and themes. These elements create expectations in audiences and allow genres to be targeted toward specific groups. Both repetition and variation of elements are important for a genre's success, as too little of either can disappoint or bore audiences.
Ekologi dan ilmu lingkungan
Ekologi dan ilmu lingkungan08' geografi di universitas negeri gorontalo_next '13 geografi di universitas negeri makassar
ekologi dan ilmu lingkungaСМОТРЕТЬ НА СИРИЮ, ВИДЕТЬ АФГАНИСТАН
Авторы доклада — Арсений Сивицкий и Юрий Царик — излагают своё видение действий Российской Федерации на Ближнем Востоке, исходя из понимания российской геостратегии в сложившихся условиях. По мнению экспертов, Россия готова способствовать укреплению позиций в регионе Саудовской Аравии в обмен на повышение вероятности выхода Ирана из ядерного соглашения с международным сообществом и усиления конфликтной динамики в регионе, которая обеспечит рост цен на энергоносители. В то же время авторы считают, что ближневосточная кампания России имеет значение, прежде всего, как подготовка к более активным действиям в Центральной Азии.
tugas geografi industri
tugas geografi industri 08' geografi di universitas negeri gorontalo_next '13 geografi di universitas negeri makassar
Dokumen tersebut membahas empat dasar pengambilan kebijakan industri di Indonesia yaitu untuk memberikan arahan kepada pelaku industri, pedoman bagi pemerintah, tolok ukur kemajuan industri, dan informasi untuk mendukung partisipasi masyarakat. Dokumen tersebut juga membahas kendala-kendala industri seperti keterbatasan teknologi dan SDM, serta dampak positif dan negatif dari industrialisasi seperti urbanisasi, ekspEvaluation question 1 magazine
The document discusses the conventions and codes used in magazine front covers. It provides examples of how the student's magazine cover both follows and varies from typical conventions. Elements like central images with direct eye contact, limited colors, and tag words are discussed as conventions that the student's cover follows. Variations from conventions include using multiple topics of interest rather than a single focus, and having all text the same size rather than varying sizes. The codes and conventions discussed aim to engage audiences and follow realistic styles of existing magazines.
Alexander calder
Alexander Calder was an American sculptor and artist known for inventing mobile sculptures that incorporated hanging or moving parts. Some of his most famous works mentioned in the document include La Spirale from 1958, Lobster Trap & Fish Tail from 1939 made of painted steel wire and aluminum, and Mercury Fountain featuring actual mercury from the 1937 World's Fair in Paris. The document also lists several other abstract metal sculptures Calder created between 1926-1973 such as Red Panel, Big Bird, Teodelapio, and Flamingo made using materials like sheet metal, wire, and paint.
Question 2 media evaluation 2
The document discusses the effectiveness of linking a film trailer, magazine, and poster through cross-media convergence. It analyzes how the tagline, characters, narrative, and design elements are connected across the three mediums. Key strengths highlighted are the consistent use of the main character, blood imagery, and color scheme. Opportunities for improvement include making the tagline and fonts more consistent between the magazine and other elements. The document demonstrates an understanding of how to strategically link promotional materials to effectively market a film through different media channels.
Embossed art
This document provides instructions for a metal embossing project where students choose a natural pattern, create a composition on paper, emboss the design onto metal, and color it with markers. Examples of student work are included to demonstrate the process of embossing designs from nature onto metal and adding color.
Rental report q4-2014
Toronto, January 16, 2015 – Toronto Real Estate Board President Paul Etherington announced that fourth quarter 2014 condominium apartment rental transactions though the TorontoMLS system were up by 17 per cent to 5,036 compared to the fourth quarter of 2013. Over the same period, the number of condominium apartments listed on TorontoMLS was also up, but by a lesser annual rate.
Annabelle
The trailer introduces the film Annabelle about a doll given as a gift to a pregnant woman that turns sinister. Various horror conventions are used to build tension and frighten the audience. These include ominous music, dark lighting, jump scares, graphic blood, and ambiguous threatening figures. The trailer hints that the doll may be connected to violence that befalls the couple, leaving the audience unsettled about the doll's intentions.
Annabelle
The document analyzes the codes and conventions used in the teaser trailer for the horror film "Annabelle." It summarizes that the trailer uses techniques like juxtaposition, close-ups, costumes, score, lighting, blood, and screams to establish mood, foreshadow danger, and frighten the audience - which are common conventions of horror film trailers meant to grab attention and set an unsettling tone. The analysis provides examples of how each convention is employed to build suspense, compare characters/objects, and imply threats to characters and the spread of evil or danger.
Conventions of Jessabelle
The trailer introduces the main character Jessabelle through conversations that reveal tension in her relationship with her father. Short clips show Jessabelle panicking and screaming as unexplained scary events occur. The trailer builds suspense through the music and cuts between actions without full context to encourage viewers to watch the film for answers. It ends on a cliffhanger of Jessabelle trying to escape something unknown to leave viewers wondering what happens.
Knock out Introduction with samples (jsfiddle.net)
KnockoutJS is a client-side MVVM JavaScript library that is 40kb minified and 166kb debug. It has no dependencies and works on all mainstream browsers. KnockoutJS uses data-binding and automatic UI refresh to provide a high level link between the UI and data model. It features dependency tracking, declarative bindings, and templating. The document includes examples of basic bindings, custom bindings, mapping data, and binding contexts in KnockoutJS.
AARP Studios: Tethering Storytelling to Social
What happens when you partner social strategists with multimedia producers to make great content designed to be shared across your community?
1st video (over 1mm views in week one): https://www.youtube.com/watch?v=-PHcdn8R4d4
2nd video (over 1mm views in week one): https://www.youtube.com/watch?v=38CPg9OS510
Viewers also liked (20)
Knock out Introduction with samples (jsfiddle.net)
Knock out Introduction with samples (jsfiddle.net)
Similar to 013_38S1286
Jeas 0915 2655 (2)
This document summarizes a study that investigated the removal of nitrate from groundwater using activated carbon prepared from rice husk and sludge from a paper industry wastewater treatment plant. The key findings are:
- Activated carbon from rice husk achieved a maximum nitrate removal of 93.5 mg/g at pH 4 and 4 hours of contact time. Activated carbon from paper industry sludge achieved 79.5 mg/g removal under the same conditions.
- Adsorption was best fitted by the Langmuir isotherm model and followed pseudo-second order kinetics.
- Increasing the ratio of ZnCl2 used for activation improved adsorption capacity, with a 1:
Performance of Fluidized Bed Biofilm Reactor for Nitrate Removal
Nitrate is present in the majority of water resources, and has reached serious level in many parts of the world, which is responsible for environmental problems. Hence it is necessary to remove nitrate. Biological denitrification provides the most economical means for nitrate removal. This paper represents the performance of Fluidized Bed Biofilm Reactor (FBBR) using bone china fine granules as biofilm carrier media for biological denitrification.
In this experimental work, the maximum average nitrogen removal efficiency of 93.71% at HRT of 30 minutes and optimum efficiency of 88.13% at HRT of 10 minutes is observed. For nitrogen loading rates varying from 0.48 to 28.80 kg N m-3 d-1, denitrification rates observed are 0.44 kg N m-3 d-1 to 17.26 kg N m-3 d-1. Optimum nitrogen loading rate and denitrification rate observed are 10.08 kg N m-3 d-1 and 8.88 kg N m-3 d-1 respectively. The results justify the usefulness of FBBR for denitrification.
DEVELOPMENT OF A NITRATE CONCENTRATON PREDICTION MODEL USING UV
This document describes Evan Forney's master's thesis project which aimed to develop a model to predict nitrate concentration in municipal wastewater effluent using UV/Vis spectroscopy. Forney collected samples from a wastewater treatment plant and measured actual nitrate, nitrite, and TOC concentrations. Absorbance measurements were taken at two wavelengths and used to develop a prediction model from 30 calibration samples. The model was tested on 10 additional samples and showed good correlation between measured and predicted nitrate concentrations. The results suggest UV/Vis spectroscopy could be used to quickly monitor and detect potential treatment upsets related to the nitrogen removal process.
IRJET- Design of Leachate Bioreactor for Dilkap College
This document describes a study conducted to design a leachate bioreactor for Dilkap College in Maharashtra, India. Specifically:
- Researchers created a model tank containing layered gravel, soil, food waste from the college canteen, and additional soil to treat leachate generated from the waste.
- The leachate collected from the model would be used in an anaerobic bioreactor to convert it into methane gas, which could then be used as an energy source.
- The document reviews several other studies on leachate treatment methods, such as using solar photocatalysis and membrane bioreactor technologies to reduce leachate pollution and convert it into usable fuels.
Dv36730734
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.
IRJET- Diminution of Nitrate Level from Water using Low-Cost Adsorbent – ...
This document summarizes a study on using rice husk as a low-cost adsorbent to remove nitrates from water. The study investigated the maximum nitrate removal efficiency of rice husk through batch adsorption experiments. It found that the maximum removal of 99.06% occurred with 2 grams of adsorbent per 100ml of water sample over a reaction time of 60 minutes. Optimization experiments determined these parameters of adsorbent dosage and reaction time produced the highest removal efficiency. The study concluded that rice husk is an effective and inexpensive adsorbent for removing nitrates from water.
GREEN NANO-TECHNOLOGY IN TARGETED DRUG DELIVERY SYSTEM
This document discusses green nanotechnology and its use in targeted drug delivery systems. It begins by defining green nanotechnology as using nanotechnology in an environmentally friendly way. It then discusses how green nanotechnology can be used to synthesize metallic nanoparticles like gold, silver, copper, and titanium dioxide from plant extracts in a sustainable way. These nanoparticles have applications as drug delivery vehicles due to properties like biocompatibility and controlled drug release. The document outlines several principles of green nanotechnology like prevention of waste. It discusses the advantages of nano drug delivery systems in increasing drug stability, solubility and bioavailability. In summary, the document explores how green nanotechnology can synthesize nanoparticles from plants for applications in targeted drug delivery.
IRJET- Batch Studies on Colour Removal Potential by Zinc Oxide Nanoparticles
This study evaluated the potential of zinc oxide nanoparticles (ZnO NPs) for removing two synthetic dyes: Reactive Black 8 (RB 8) and Direct Red 23 (DR 23). Batch experiments were conducted under varying pH, contact time, adsorbent dosage, and initial dye concentration. The results showed that ZnO NPs achieved higher removal of RB 8 at alkaline pH 9 (99.6%) compared to acidic pH 5 (18.2%). For DR 23, higher removal was observed at acidic pH 5 (98.5%) than alkaline pH 9 (25.3%). Both dyes had lower removal at higher initial concentrations. Maximum RB 8 and DR 23 removal occurred at 60 minutes and 80 minutes contact time
Reed Bed System an Efficient Treatment Removal of Sewage Wastewater Parameters
This document summarizes a study on using a reed bed system to treat sewage wastewater. Reed bed systems are a low-cost alternative to conventional wastewater treatment. The study constructed a model reed bed system using plastic containers layered with gravel, sand, soil and planted with reeds. Wastewater samples from a local sewage drain were treated in the model system for 5, 10, 15 and 20 days. Testing showed the reed bed system reduced levels of pH, odor, color, conductivity, alkalinity, COD and BOD over time, with higher removal rates at longer detention periods. The reed bed system proved an efficient and low-cost method for wastewater treatment
PROF OJOAWO'S OSUN NICE TECHNICAL PAPER MAY 2023.pdf
This is the Text of a Technical Presentation by Prof. Samson O. Ojoawo, FNICE at the May 2023 Monthly meeting of the OSUN STATE CHAPTER, NIGERIAN INSTITUTION OF CIVIL ENGINEERS (NICE) delivered on Saturday May 20, 2023
Evaluation of the photo-catalytic oxidation process with commercial ZnO for r...
The textile industry uses a very great amount of water in their process and then, produces high
quantities of colorful wastewater containing pollutants like suspended solids, heavy metals and other inorganic
and organic compounds. In this study, real textiles wastewaters were processed in an oxidative photo-catalytic
slurry reactor, using commercial ZnO as the catalyst, in order to evaluate its efficiency, the effect of pH, the
effect of catalyst loading and its kinetics. The process was tested in a batch reactor, in bench and semi-pilot
scales, with excellent data reproducibility observed in the scale-up. Moreover, decolorizations of 97.43 %, BOD
and COD reduction were obtained, showing good applicability of the process. According to regional
environmental agencies, the final effluents parameters were checked showing good acceptance for the use of
ZnO, except for the presence of Zn2+ in the effluent as a disadvantage.
Batch Studies Of Adsorptive Removal of Arsenite from Water Using Coconut (Coc...
1) Batch studies were conducted to examine the removal of arsenite (As(III)) from water using coconut fiber as an adsorbent.
2) Maximum As(III) removal of 95.56% was achieved at an adsorbent dose of 10 g/l, contact time of 8 hours, pH of 4, and mixing speed of 80 rpm.
3) Equilibrium studies showed that the experimental data fit well with the Freundlich isotherm model, indicating that As(III) adsorption onto coconut fiber is best described as multilayer adsorption on a heterogeneous surface.
High Rate of Water Biodenitrification Using Anthracite as Hyphomicrobium Deni...
Pure culture of Hyphomicrobium denitrificans DSM 1869 was immobilized on anthracite and utilized for biological denitrification in 50-ml flasks employing methanol and acetic acid as carbon source. The results demonstrate that acetic acid was a suitable carbon source for H. denitrificans to remove high nitrate concentrations. The maximum denitrification rate was 233.1 mg NO3-N/g MLSS.h and the highest NO3-N removal efficiency was obtained when using C/N ratio of 4.0 and acetic acid as the carbon source. C/N ratio can significantly affect denitrification in different operational conditions. The low C/N ratios did not allow the denitrification process to be completed in case of high NO3-Nconcentrations. High C/N ratio increased the rate of nitrate conversion when using acetic acid as a carbon source; but added a pollutant to denitrified water when using methanol as a carbon source. The results demonstrated that H. denitrificans was a suitable bacterium for denitrifying high NO3-N concentrations.
Diplomarbeit imprimir_kurtz
This document presents the results of experiments on a new method for removing nitrates from drinking water. The method involves incorporating nitrate ions into calcium aluminium storage crystals. A series of batch experiments were conducted with drinking water from wells in Spain and Germany containing 164-230 mg/L of nitrates. The best results achieved a 41% nitrate reduction from 164 mg/L in a single step, and a 67% reduction from 230 mg/L using multiple treatment steps. Varying experimental conditions like magnesium chloride concentration, pH, and removing carbonate ions affected the nitrate removal efficiency. The results demonstrate the potential of this storage crystal method for reducing high nitrate levels in groundwater.
55 69%20 ahmed
The document summarizes a study on using a combined anaerobic-aerobic reactor system to treat textile wastewater. Key findings include:
- Over 84.62% of ammonia nitrogen and about 98.9% of volatile suspended solids were removed by the system.
- Dissolved oxygen, pH, and organic changes were investigated during the nitrification and denitrification processes. Dissolved oxygen and pH were found to have only slight influences on nitrification, and a 10% removal of nitrogen resulted in about a 3% change in pH.
- The system was able to effectively remove nitrogen and organic materials from textile wastewater through the coupled anaerobic and aer
Removal of Fluoride From Drinking Water Using Tea Waste as Adsorbent
This document summarizes research on removing fluoride from drinking water using tea waste as an adsorbent. Through batch and column studies, the researchers tested the ability of chemically treated tea waste to adsorb fluoride. In batch studies, they found that 150 μm tea waste particles achieved the highest removal efficiency. Maximum efficiency was reached at a dosage of 13 g/l, initial fluoride concentration of 3 mg/l, contact time of 150 minutes, and pH of 6.5. Column studies showed the highest removal efficiency of 77.1% was achieved at a bed depth of 5.4 cm and flow rate of 5 ml/min. Regeneration studies demonstrated the adsorbent could be regenerated using sodium hydrox
Wastewater thesis hariom
This document summarizes a study on using a bench-scale UASB (Upflow Anaerobic Sludge Blanket) reactor to treat municipal wastewater in Tripura, India. The study involved designing and constructing a bench-scale UASB reactor, collecting wastewater samples, and analyzing the samples for COD, BOD, DO and TDS over 30 days. The results showed approximately 50% removal of dissolved oxygen, 73% removal of chemical oxygen demand, 33.5% removal of total dissolved solids, and 72.3% removal of biological oxygen demand. The study concluded the UASB reactor was effective at removing contaminants and this technology could be useful for wastewater treatment in
6 tove larsen_eva_2016 globalt perspektiv
Sortering ved kilden. Et globalt perspektiv på spildevandshåndtering
Tove Larsen, Eawag, Schweiz
Ved Eawag i Schweiz forskes der i bæredygtig spildevandsrensning - også i et globalt perspektiv. Der udvikles løsninger på spildevandshåndteringen ud fra en målsætning om, at spildevandsfraktionerne ikke skal blandes sammen, og der skal benyttes så korte transportveje som muligt. Målet er at minimere emissionerne til vandmiljøet og atmosfæren, samtidigt med at ressource-husholdningen (vand, energi, etc.) optimeres.
Leachate generation from tsdf and its treatment options
Introduction to Hazardous waste landfill and Leachate
Supportive Data and figures
Real Episode due to Leachate Contamination
Leachate Generation Factors
TSDF - Introduction
TSDF – Case Study
Literature Review
List of Applicable leachate treatment Technologies
Treatment of Sewage by Phytoremediation method using Izndian mustard Plant
Increasing urbanization, industrialization and over population is one of the leading causes of environmental degradation and pollution. Aquatic bodies are the traditional recipients of sewage containing heavy contaminants, which are released in higher concentrations and cause deleterious effects on organisms. Phytoremediation, an ecofriendly technology which is both ecologically sound and economically viable is an attractive alternative to the current cleanup methods that are very expensive. Phytoremediation technology is a cost effective one as it utilizes plants natural ability to suck the pollutant present in the water. There are many plants having this natural ability to up take the heavy metals and organic pollutants from air, soil and water. In this project we have treated the sewage coming out after primary treatment using phytoremediation techniques. In this project, the sewage which is taken from the primary treatment unit is further treated using phytoremediation technique that is the mustard plant is used for treating the sewage and thereby reducing the contaminants in wastewater to meet the wastewater disposal standards. Among various phytoremediation techniques phytovolatilization found to be effective in removing the pollutant as BOD, COD, Turbidity, Total dissolved solids, Kjeldahl nitrogen. The phytovolatilization showed the best removal of BOD up to 59.44 , COD up to 60.02 , Turbidity up to 97.83 , Total dissolved solids up to 31.35 , Kjeldahl nitrogen 97.46 . Karthika. V "Treatment of Sewage by Phytoremediation method using Izndian mustard Plant" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-5 , August 2020, URL: https://www.ijtsrd.com/papers/ijtsrd31644.pdf Paper Url :https://www.ijtsrd.com/engineering/environmental-engineering/31644/treatment-of-sewage-by-phytoremediation-method-using-izndian-mustard-plant/karthika-v
Similar to 013_38S1286 (20)
Performance of Fluidized Bed Biofilm Reactor for Nitrate Removal
Performance of Fluidized Bed Biofilm Reactor for Nitrate Removal
DEVELOPMENT OF A NITRATE CONCENTRATON PREDICTION MODEL USING UV
DEVELOPMENT OF A NITRATE CONCENTRATON PREDICTION MODEL USING UV
IRJET- Design of Leachate Bioreactor for Dilkap College
IRJET- Design of Leachate Bioreactor for Dilkap College
IRJET- Diminution of Nitrate Level from Water using Low-Cost Adsorbent – ...
IRJET- Diminution of Nitrate Level from Water using Low-Cost Adsorbent – ...
GREEN NANO-TECHNOLOGY IN TARGETED DRUG DELIVERY SYSTEM
GREEN NANO-TECHNOLOGY IN TARGETED DRUG DELIVERY SYSTEM
IRJET- Batch Studies on Colour Removal Potential by Zinc Oxide Nanoparticles
IRJET- Batch Studies on Colour Removal Potential by Zinc Oxide Nanoparticles
Reed Bed System an Efficient Treatment Removal of Sewage Wastewater Parameters
Reed Bed System an Efficient Treatment Removal of Sewage Wastewater Parameters
PROF OJOAWO'S OSUN NICE TECHNICAL PAPER MAY 2023.pdf
PROF OJOAWO'S OSUN NICE TECHNICAL PAPER MAY 2023.pdf
Evaluation of the photo-catalytic oxidation process with commercial ZnO for r...
Evaluation of the photo-catalytic oxidation process with commercial ZnO for r...
Batch Studies Of Adsorptive Removal of Arsenite from Water Using Coconut (Coc...
Batch Studies Of Adsorptive Removal of Arsenite from Water Using Coconut (Coc...
High Rate of Water Biodenitrification Using Anthracite as Hyphomicrobium Deni...
High Rate of Water Biodenitrification Using Anthracite as Hyphomicrobium Deni...
Removal of Fluoride From Drinking Water Using Tea Waste as Adsorbent
Removal of Fluoride From Drinking Water Using Tea Waste as Adsorbent
Leachate generation from tsdf and its treatment options
Leachate generation from tsdf and its treatment options
Treatment of Sewage by Phytoremediation method using Izndian mustard Plant
Treatment of Sewage by Phytoremediation method using Izndian mustard Plant
013_38S1286
- 1. DEVELOPMENT OF MATHEMATICAL MODELS FOR REMOVAL OF NITRATES FROM WASTE WATER PROJECT REFERENCE NO.: 38S1286 COLLEGE : BAPUJI INSTITUTE OF ENGINEERING AND TECHNOLOGY, DAVANGERE BRANCH : DEPARTMENT OF CHEMICAL ENGINEERING GUIDE : DR.G.P.DESAI DR.SURESH B STUDENTS : MR. ANISH JACOB MR. ARAVIND RAJAN MR. SHOBANA RAJAN Keywords used in the synopsis Adsorbent, nitrate, model, carbon, waste water. Introduction / background (with specific reference to the project, work done earlier, etc) Nitrate (NO3 - ) is one of the integral parts in growth of life. It is essential for the growth of many plant species, including most of those which are edible, but it becomes a problem if it gets into water in which it is not required. This leads to major environmental problem and also as a health hazard. Water contamination by nitrate is a global problem and nitrate is a widespread contaminant of ground and surface water worldwide. Numerous sources in the environment contribute to the total nitrate content of natural water mainly by, agriculture, human and animal wastes etc. Removal of nitrate from water has been studied by different researchers but the methods developed are costly and time consuming. The data generated during the studies are not properly correlated and hence are not properly quantified and predicted. The present work is an effort to develop mathematical model for removal of nitrate from water using bagasse ash which is a waste from sugar industry and available easily. The results are compared with that of activated carbon.
- 2. Objectives To review literature about effects of nitrate pollution To study different methods of removal of nitrates from waste water To optimize a suitable method for study To experimentally determine the process parameters To correlates the parameters and develop mathematical models for prediction of the parameters. Methodology • Carbon was activated by heating and acid treatment. • Bagasse was got from local sugar industry which was dried and powdered. The material was burnt in the absence of air and was used as adsorbent. • Magnetic stirrer was used for batch studies and UV-Visible spectrometer was used for analytical work. • Total of 8 sets of experiments were conducted to evaluate the change in nitrate concentration with time. • For each set 500 ml nitrate solution was used. • Two adsorbents were used; Activated Charcoal and Bagasse Ash, 4 sets for each were conducted. • Samples were collected in 10 ml sample bottles. • Samples were collected every hour in seven hour long experiment. • Initial concentration of adsorbent was varied for each set of experiment. • Samples were analyzed in a UV Spectrophotometer to get the nitrate concentration.
- 3. Results and Conclusions The results clearly revealed that both the adsorbents showed positive trend for removal of nitrate. Maximum percentage removal of nitrate by adsorption is reported in adsorbent dose of 20 gms. Percentage adsorption increases with adsorbent load at a decreasing rate. Initial concentration is seen to have a positive effect on adsorption rate. The positive effect takes a decreasing rate as the adsorbent load increases. Overall conclusion is that “bagasse ash” can be a good adsorbent for removal of nitrate from water, which is cheap and easily available in local environs. Scope for future work This work can be continued for evaluating effect of pH on adsorption. Effect of stirring rate and temperature also can be studied. After optimizing all the process parameters a rational design of an adsorber can be undertaken and field tested for commercialization.