The document discusses cavitation-based process intensification (PI) technology for wastewater treatment. It describes cavitation as the formation and collapse of bubbles in liquid caused by changes in pressure. Cavitation can be acoustic (caused by sound waves) or hydrodynamic (caused by changes in fluid velocity). During collapse, cavities release energy creating hot spots that can drive chemical reactions. The document outlines how cavitation generates radicals to oxidize pollutants in wastewater, providing an energy efficient alternative to other advanced oxidation processes. It also discusses how cavitation can intensify water disinfection by its mechanical, chemical, and thermal effects.
Application of Hydrodynamic cavitation as advanced oxidation process to treat...Sivakumar Kale
This document discusses the application of hydrodynamic cavitation as an advanced oxidation process to treat industrial wastewater. It begins by explaining that conventional biological treatment cannot fully degrade non-biodegradable compounds in industrial wastewater. It then introduces hydrodynamic cavitation as an alternative, describing how cavitation generates radicals that can degrade pollutants. The document outlines the experimental setup used, including a venturi tube reactor, and describes the degradation mechanisms of mechanical effects, chemical effects from radicals, and thermal effects. It presents results showing the process can oxidize over 99% of certain compounds. It concludes by discussing the need for further research on pressure profiles, reaction kinetics, and scaling the technology.
15) groundwater contamination, prevention and remedial techniques as on 27-05...Najam Ul Syed Hassan
This document discusses groundwater contamination and remediation. It introduces groundwater and its importance as a source of drinking water for over 50% of the world's population. It describes how groundwater can become contaminated through human activities like industrial chemical spills and leaks, improper waste disposal, and excessive pesticide and fertilizer use. Both ex-situ and in-situ remediation techniques are discussed for removing contaminants from groundwater, such as pump and treat methods, bioremediation, and air sparging. Specific contaminants like TCE, MTBE, EDC, and gasoline are also summarized along with their typical treatment technologies. The document emphasizes the importance of preventing groundwater contamination to avoid costly
Current advancement in different gas liquid operationsSunny Chauhan
CURRENT ADVANCEMENT IN DIFFERENT GAS-LIQUID OPERATIONS,Gas Liquid operation equipment
,Extractive distillation
,Advances in Gas Absorption,High efficiency venturi scrubber
,Advances in Diffusion
,Advances in Stirred Tanks
,Advances in Distillation
,Advances in Venturi Scrubber
Hydrodynamic cavitation is the rapid formation and collapse of vapor bubbles within a liquid caused by variations in pressure due to the presence of devices that constrict liquid flow, such as venturis or orifices. Cavitation occurs when the static pressure drops below the vapor pressure of the liquid. During cavitation, high temperatures and pressures are generated within bubbles that drive various chemical and physical effects upon collapse. Hydrodynamic cavitation has applications in waste water treatment, microbial cell disruption, chemical reactions, food processing, and synthesis of nanoparticles. It provides an energy efficient alternative to other techniques like ultrasound or high pressure homogenization.
The document discusses environmental challenges facing the sugar sector in Pakistan. It outlines various wastes produced during sugar production such as wastewater from mill houses containing suspended solids and oils. It then discusses potential environmental solutions including in-house improvement options to reduce waste at source, air and noise emission control measures, and wastewater treatment technologies. Specific treatment methods are described such as lagoons, trickling filters, upflow anaerobic sludge blanket reactors, and activated sludge treatment. ISO 14001 certification and benefits of environmental management systems are also summarized.
This document discusses using oxidation ponds for sustainable waste water treatment in rural areas. Oxidation ponds use natural biological processes to efficiently remove up to 98-99% of bacteria, biodegradable organics, phosphorus, and nitrogen from wastewater. The ponds support an interaction between bacteria, algae, and other organisms to purify the water before discharge. The document covers pond design criteria like sizing based on BOD loading rates and detention time. It also describes the mechanisms of different pond types, including aerobic, anaerobic, and facultative ponds, and concludes that oxidation ponds provide a low-cost and simple method for waste water treatment suitable for rural communities.
Led a team of four in the recently concluded Northeast section of the Ohio Water Environment Association. In the slides, It describes the alternatives and recommended solution to treat wastewater that has pharmaceuticals contaminants in it. My team cane second place in a total of seven teams
Application of Hydrodynamic cavitation as advanced oxidation process to treat...Sivakumar Kale
This document discusses the application of hydrodynamic cavitation as an advanced oxidation process to treat industrial wastewater. It begins by explaining that conventional biological treatment cannot fully degrade non-biodegradable compounds in industrial wastewater. It then introduces hydrodynamic cavitation as an alternative, describing how cavitation generates radicals that can degrade pollutants. The document outlines the experimental setup used, including a venturi tube reactor, and describes the degradation mechanisms of mechanical effects, chemical effects from radicals, and thermal effects. It presents results showing the process can oxidize over 99% of certain compounds. It concludes by discussing the need for further research on pressure profiles, reaction kinetics, and scaling the technology.
15) groundwater contamination, prevention and remedial techniques as on 27-05...Najam Ul Syed Hassan
This document discusses groundwater contamination and remediation. It introduces groundwater and its importance as a source of drinking water for over 50% of the world's population. It describes how groundwater can become contaminated through human activities like industrial chemical spills and leaks, improper waste disposal, and excessive pesticide and fertilizer use. Both ex-situ and in-situ remediation techniques are discussed for removing contaminants from groundwater, such as pump and treat methods, bioremediation, and air sparging. Specific contaminants like TCE, MTBE, EDC, and gasoline are also summarized along with their typical treatment technologies. The document emphasizes the importance of preventing groundwater contamination to avoid costly
Current advancement in different gas liquid operationsSunny Chauhan
CURRENT ADVANCEMENT IN DIFFERENT GAS-LIQUID OPERATIONS,Gas Liquid operation equipment
,Extractive distillation
,Advances in Gas Absorption,High efficiency venturi scrubber
,Advances in Diffusion
,Advances in Stirred Tanks
,Advances in Distillation
,Advances in Venturi Scrubber
Hydrodynamic cavitation is the rapid formation and collapse of vapor bubbles within a liquid caused by variations in pressure due to the presence of devices that constrict liquid flow, such as venturis or orifices. Cavitation occurs when the static pressure drops below the vapor pressure of the liquid. During cavitation, high temperatures and pressures are generated within bubbles that drive various chemical and physical effects upon collapse. Hydrodynamic cavitation has applications in waste water treatment, microbial cell disruption, chemical reactions, food processing, and synthesis of nanoparticles. It provides an energy efficient alternative to other techniques like ultrasound or high pressure homogenization.
The document discusses environmental challenges facing the sugar sector in Pakistan. It outlines various wastes produced during sugar production such as wastewater from mill houses containing suspended solids and oils. It then discusses potential environmental solutions including in-house improvement options to reduce waste at source, air and noise emission control measures, and wastewater treatment technologies. Specific treatment methods are described such as lagoons, trickling filters, upflow anaerobic sludge blanket reactors, and activated sludge treatment. ISO 14001 certification and benefits of environmental management systems are also summarized.
This document discusses using oxidation ponds for sustainable waste water treatment in rural areas. Oxidation ponds use natural biological processes to efficiently remove up to 98-99% of bacteria, biodegradable organics, phosphorus, and nitrogen from wastewater. The ponds support an interaction between bacteria, algae, and other organisms to purify the water before discharge. The document covers pond design criteria like sizing based on BOD loading rates and detention time. It also describes the mechanisms of different pond types, including aerobic, anaerobic, and facultative ponds, and concludes that oxidation ponds provide a low-cost and simple method for waste water treatment suitable for rural communities.
Led a team of four in the recently concluded Northeast section of the Ohio Water Environment Association. In the slides, It describes the alternatives and recommended solution to treat wastewater that has pharmaceuticals contaminants in it. My team cane second place in a total of seven teams
IRJET- Applications of Anaerobic Baffled Reactor in Wastewater Treatment usin...IRJET Journal
This document discusses the use of anaerobic baffled reactors for wastewater treatment. Anaerobic baffled reactors have several advantages over other anaerobic treatment systems, such as better resilience to shocks, longer biomass retention times, and lower sludge production. The physical structure of anaerobic baffled reactors allows for modifications like adding an aerobic polishing stage to treat difficult wastewaters. The study investigated the behavior of three reactors using different types of biofilms to improve treatability. Test results revealed the reactor using palm fiber biofilm gave the highest COD removal compared to the others. In general, anaerobic baffled reactors provide a simple and effective way to treat various wast
The document discusses scientific approaches to inhibiting the transformation of water-based process fluids. It aims to develop chemical technologies and equipment for slowing transformation through new scientific solutions. The research seeks to establish theoretical foundations for inhibition processes based on mass transfer and hydrodynamic theories. It analyzes factors causing rapid fluid changes and outlines tasks to define transformation indicators, develop inhibition methods, and create resource-efficient technologies to maintain fluid quality for over one year of use.
The document discusses process intensification, including its history, components, methods, and case studies. Process intensification aims to shrink the size of chemical plants while increasing efficiency. It can reduce environmental impact and costs. Case studies on producing olefins from natural gas, water treatment, and power generation from waste were presented. Simulation of the waste to power process was described along with the thermodynamic packages used.
EnviroChemie - Wastewater treatment solutions for the pharmaceutical and life...jose_canga
This document discusses wastewater treatment solutions for the pharmaceutical and life sciences industry provided by EnviroChemie GmbH. It summarizes EnviroChemie's range of treatment technologies including biological treatment, membrane filtration, chemical-physical treatment, advanced oxidation processes, and thermal sterilization. It also describes their applications for wastewater streams from pharmaceutical production and their benefits like smaller plant footprints, higher quality effluent, and ability to enable water reuse and recycling.
Feasibility study on treatment plan of scouring wastewater in the printing an...eSAT Journals
Abstract
With the rapid development of printing and dyeing industry, the total emissions of printing and dyeing wastewater growing day by day, the components are more and more complex. At present, comprehensive treatment method to sewage treatment is used primarily in printing and dyeing wastewater. This not only increases the area, but also increases the processing cost. In this article, scouring wastewater in the printing and dyeing wastewater is treated separately. Meanwhile, compared the two kinds of processing methods in terms of economy and technology,demonstrated the feasibility of scouring wastewater treated separately, provided theoretical basis for diversified treatment of printing and dyeing wastewater.
Keywords: Comprehensive treatment, economic comparison, feasibility study, individual treatment, printing and dyeing wastewater, scouring wastewater.
This document discusses process intensification, which aims to revolutionize chemical engineering processes through more efficient and compact equipment. It provides a history of process intensification, noting its formal recognition in 1995. Process intensification seeks to maximize rates of intra- and intermolecular events, provide uniform treatment for each molecule, optimize driving forces and maximize specific surface areas. It can be achieved through novel reactors with high surface area-to-volume ratios, intensive mixing, heat transfer devices, and mass transfer devices. Process intensification techniques include enhancing transport processes using alternative force fields like ultrasound and centrifugal forces, as well as integrating process steps.
The document proposes an anaerobic-aerobic process for treating domestic sewage using LEVAPOR biofilm technology. The process involves pre-treating sewage under anaerobic conditions in a biofilm reactor to reduce energy use and excess sludge production compared to conventional aerobic treatment. Sewage would then undergo post-treatment under aerobic conditions to further reduce pollutants before discharge. This process could achieve up to 75% lower energy use and 67% less sludge than aerobic treatment alone, while also producing biogas as an energy source.
IRJET- Characterisation of Grey Water and Treatment using Moving Bed Biof...IRJET Journal
This document summarizes a study that characterized greywater and treated it using a Moving Bed Biofilm Reactor (MBBR). The study investigated how various factors like flow rate, hydraulic retention time, and MBBR fill rate affected the reactor's performance in removing organic matter from greywater. The researchers found that a flow rate of 60 L/d, hydraulic retention time of 36 hours, and MBBR fill rate of 30% produced the highest COD removal efficiency of 87.45%. The MBBR media provided a large surface area for microbial growth and effectively treated greywater.
The document provides an overview of zero liquid discharge (ZLD) technologies. It discusses:
1) ZLD refers to recycling and treating wastewater such that no liquid is discharged, eliminating pollution. It involves concentrating effluent and converting solutes to solid residue.
2) Key ZLD technologies include solvent extraction, membrane bioreactors, ultrafiltration/reverse osmosis, evaporation like falling film evaporators, and agitated thin film dryers.
3) Challenges include a lack of technical guidance, complex wastewater streams, and needing integrated technologies for reduce, recycle, recovery and reuse.
Investigation on the Effect of TiO2 and H2O2 for the Treatment of Inorganic C...inventy
Sodium hypochlorite (NaClO) is regularly used as a disinfectant or a bleaching agent because of its high efficiency against many bacteria and viruses present in seawater along with its cheaper cost. Now a days, with the increase in the environmental concerns concerning the use of chlorination for the disinfection or bleaching of treated water related to the formation of potentially harmful chloro-organic by products through reactions with natural organic matter (NOM), it is preferred to implement a process with environmentally friendly chemicals for water treatment processes. About This report aim to study the possibility of reducing the inorganic carbon present in seawater by oxidization reaction of seawater with TiO2 and H2O2. Investigated and a comparison between thin film method and suspension method with a reactor system in conjunction with a light concentrating system has been done.
This document provides an overview of biological treatments of water. It begins with an abstract describing biological treatment systems that use microorganisms to break down organic materials. It then discusses water treatment processes generally before focusing on biological methods. The key biological methods described are aerobic treatment which uses oxygen and aerobic microorganisms, and anaerobic treatment which does not use oxygen and relies on anaerobic microorganisms. Specific biological treatment technologies summarized include conventional activated sludge processes, cyclic activated sludge systems, trickling filters, and phytoremediation. The document emphasizes that both aerobic and anaerobic biological methods are often used together to effectively treat wastewater.
BIOTECHNOLOGICAL APPROACHES TOWARDS WATER WASTE MANAGEMENT saadmughal1271
This document discusses various biotechnological approaches for wastewater treatment, including engineered biosorbents for heavy metal removal, displaying metal binding peptides on microorganisms, and designing strains for enhanced biodegradation. It describes common wastewater treatment processes like the trickling filter, activated sludge process, and anaerobic digestion. Finally, it discusses using these biotechnological methods to treat wastewater from textile and desiccated coconut industries.
IRJET- Improvement of Sludge Reduction Efficiency of Ozonation by Microbubble...IRJET Journal
This document discusses improving the efficiency of sludge reduction through ozonation using microbubble aeration technology and catalysis. It finds that adding hydrogen peroxide (H2O2) as a catalyst and using microbubbles generated by a linear mixer pipe can significantly increase the biodegradability and reduce the mass of sludge. Key results include an oil content reduction from 77.48% to 51.7% after ozonation. Mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) were also reduced, while COD and NH4+ levels increased. The linear mixer pipe was found to be more effective for microbubble generation and sludge treatment than a jet
This presentation summarizes the role of pretreatment processes in enhancing anaerobic digestion of municipal solid waste. Various pretreatment methods including mechanical, thermal, chemical and combinations are discussed. A case study on microbial pretreatment of lignocellulosic waste showed improved biogas and methane production. Pretreatments can increase biodegradability, biogas yields, degradation rates and reduce retention times compared to untreated processes. Thermal pretreatments at low temperatures are often most cost-effective.
“Sustainability requires conservation of environmental resources, such as maintaining the quality of water resources, soil, air and forests; conservation of genetic diversity; and efficient use of energy, water and natural materials. Improving the efficiency of production mechanisms, in order to reduce the per capita consumption of natural resources and stimulate change in technologies and production of non-polluting consumption materials. All countries are over-invoked prevent environmental pollution through enforcement of environmental protection laws, promote technologies with low waste generation, and predict the impact of new technologies, products and wastes”.
Development of an experimental rig for bioremediation studiesAlexander Decker
The document describes the development of an experimental rig for bioremediation studies using indigenous technology. Key details include:
- The rig consists of various units like air pretreatment, fixed bed bioreactors, volatile organic compound traps, air flow meter, and carbon dioxide traps.
- Components were sized, designed, and fabricated locally at low cost. Testing showed the rig effectively degraded 75% of oil and grease from contaminated soil over 10 weeks.
- The rig was used to study bioremediation of soil contaminated with spent motor oil in 6 treatments with various additives over room temperature.
Biopolymer Technology for Cooling Water Treatment -AIWW conference 2015Irma Steemers-Rijkse
1. The document describes biopolymer technology developed by Novochem Water Treatment as an alternative to traditional toxic and non-biodegradable water treatment chemicals like zinc, polyacrylates, phosphonates and phosphates.
2. The biopolymer technology is based on biodegradable polymers from agricultural sources that effectively stabilize hardness and inhibit corrosion through hydrophobic film formation on metal surfaces.
3. Case studies show conversions from polyphosphate and all-organic programs to Novochem's biopolymer programs improved cooling water system performance, meeting discharge limits while reducing corrosion, scale, and maintenance costs.
The biological wastewater treatment processes reproduce the natural purification processes that occur in water bodies. They involve microorganisms like bacteria, protozoa, fungi, algae, and worms that convert organic matter into inert products. Understanding the microbiology is essential for optimizing treatment system design and operation. Historically, design was empirical but modern multidisciplinary engineering incorporates biology for a more rational understanding of the processes.
The biological wastewater treatment processes reproduce the natural purification processes that occur in water bodies. They involve microorganisms like bacteria, protozoa, fungi, algae, and worms that convert organic matter into inert products. Understanding the microbiology is essential for optimizing treatment system design and operation. Historically, design was empirical but incorporating biology has increased understanding, efficiency, and reduced costs. The main groups of microorganisms involved and their roles are discussed.
IRJET- Applications of Anaerobic Baffled Reactor in Wastewater Treatment usin...IRJET Journal
This document discusses the use of anaerobic baffled reactors for wastewater treatment. Anaerobic baffled reactors have several advantages over other anaerobic treatment systems, such as better resilience to shocks, longer biomass retention times, and lower sludge production. The physical structure of anaerobic baffled reactors allows for modifications like adding an aerobic polishing stage to treat difficult wastewaters. The study investigated the behavior of three reactors using different types of biofilms to improve treatability. Test results revealed the reactor using palm fiber biofilm gave the highest COD removal compared to the others. In general, anaerobic baffled reactors provide a simple and effective way to treat various wast
The document discusses scientific approaches to inhibiting the transformation of water-based process fluids. It aims to develop chemical technologies and equipment for slowing transformation through new scientific solutions. The research seeks to establish theoretical foundations for inhibition processes based on mass transfer and hydrodynamic theories. It analyzes factors causing rapid fluid changes and outlines tasks to define transformation indicators, develop inhibition methods, and create resource-efficient technologies to maintain fluid quality for over one year of use.
The document discusses process intensification, including its history, components, methods, and case studies. Process intensification aims to shrink the size of chemical plants while increasing efficiency. It can reduce environmental impact and costs. Case studies on producing olefins from natural gas, water treatment, and power generation from waste were presented. Simulation of the waste to power process was described along with the thermodynamic packages used.
EnviroChemie - Wastewater treatment solutions for the pharmaceutical and life...jose_canga
This document discusses wastewater treatment solutions for the pharmaceutical and life sciences industry provided by EnviroChemie GmbH. It summarizes EnviroChemie's range of treatment technologies including biological treatment, membrane filtration, chemical-physical treatment, advanced oxidation processes, and thermal sterilization. It also describes their applications for wastewater streams from pharmaceutical production and their benefits like smaller plant footprints, higher quality effluent, and ability to enable water reuse and recycling.
Feasibility study on treatment plan of scouring wastewater in the printing an...eSAT Journals
Abstract
With the rapid development of printing and dyeing industry, the total emissions of printing and dyeing wastewater growing day by day, the components are more and more complex. At present, comprehensive treatment method to sewage treatment is used primarily in printing and dyeing wastewater. This not only increases the area, but also increases the processing cost. In this article, scouring wastewater in the printing and dyeing wastewater is treated separately. Meanwhile, compared the two kinds of processing methods in terms of economy and technology,demonstrated the feasibility of scouring wastewater treated separately, provided theoretical basis for diversified treatment of printing and dyeing wastewater.
Keywords: Comprehensive treatment, economic comparison, feasibility study, individual treatment, printing and dyeing wastewater, scouring wastewater.
This document discusses process intensification, which aims to revolutionize chemical engineering processes through more efficient and compact equipment. It provides a history of process intensification, noting its formal recognition in 1995. Process intensification seeks to maximize rates of intra- and intermolecular events, provide uniform treatment for each molecule, optimize driving forces and maximize specific surface areas. It can be achieved through novel reactors with high surface area-to-volume ratios, intensive mixing, heat transfer devices, and mass transfer devices. Process intensification techniques include enhancing transport processes using alternative force fields like ultrasound and centrifugal forces, as well as integrating process steps.
The document proposes an anaerobic-aerobic process for treating domestic sewage using LEVAPOR biofilm technology. The process involves pre-treating sewage under anaerobic conditions in a biofilm reactor to reduce energy use and excess sludge production compared to conventional aerobic treatment. Sewage would then undergo post-treatment under aerobic conditions to further reduce pollutants before discharge. This process could achieve up to 75% lower energy use and 67% less sludge than aerobic treatment alone, while also producing biogas as an energy source.
IRJET- Characterisation of Grey Water and Treatment using Moving Bed Biof...IRJET Journal
This document summarizes a study that characterized greywater and treated it using a Moving Bed Biofilm Reactor (MBBR). The study investigated how various factors like flow rate, hydraulic retention time, and MBBR fill rate affected the reactor's performance in removing organic matter from greywater. The researchers found that a flow rate of 60 L/d, hydraulic retention time of 36 hours, and MBBR fill rate of 30% produced the highest COD removal efficiency of 87.45%. The MBBR media provided a large surface area for microbial growth and effectively treated greywater.
The document provides an overview of zero liquid discharge (ZLD) technologies. It discusses:
1) ZLD refers to recycling and treating wastewater such that no liquid is discharged, eliminating pollution. It involves concentrating effluent and converting solutes to solid residue.
2) Key ZLD technologies include solvent extraction, membrane bioreactors, ultrafiltration/reverse osmosis, evaporation like falling film evaporators, and agitated thin film dryers.
3) Challenges include a lack of technical guidance, complex wastewater streams, and needing integrated technologies for reduce, recycle, recovery and reuse.
Investigation on the Effect of TiO2 and H2O2 for the Treatment of Inorganic C...inventy
Sodium hypochlorite (NaClO) is regularly used as a disinfectant or a bleaching agent because of its high efficiency against many bacteria and viruses present in seawater along with its cheaper cost. Now a days, with the increase in the environmental concerns concerning the use of chlorination for the disinfection or bleaching of treated water related to the formation of potentially harmful chloro-organic by products through reactions with natural organic matter (NOM), it is preferred to implement a process with environmentally friendly chemicals for water treatment processes. About This report aim to study the possibility of reducing the inorganic carbon present in seawater by oxidization reaction of seawater with TiO2 and H2O2. Investigated and a comparison between thin film method and suspension method with a reactor system in conjunction with a light concentrating system has been done.
This document provides an overview of biological treatments of water. It begins with an abstract describing biological treatment systems that use microorganisms to break down organic materials. It then discusses water treatment processes generally before focusing on biological methods. The key biological methods described are aerobic treatment which uses oxygen and aerobic microorganisms, and anaerobic treatment which does not use oxygen and relies on anaerobic microorganisms. Specific biological treatment technologies summarized include conventional activated sludge processes, cyclic activated sludge systems, trickling filters, and phytoremediation. The document emphasizes that both aerobic and anaerobic biological methods are often used together to effectively treat wastewater.
BIOTECHNOLOGICAL APPROACHES TOWARDS WATER WASTE MANAGEMENT saadmughal1271
This document discusses various biotechnological approaches for wastewater treatment, including engineered biosorbents for heavy metal removal, displaying metal binding peptides on microorganisms, and designing strains for enhanced biodegradation. It describes common wastewater treatment processes like the trickling filter, activated sludge process, and anaerobic digestion. Finally, it discusses using these biotechnological methods to treat wastewater from textile and desiccated coconut industries.
IRJET- Improvement of Sludge Reduction Efficiency of Ozonation by Microbubble...IRJET Journal
This document discusses improving the efficiency of sludge reduction through ozonation using microbubble aeration technology and catalysis. It finds that adding hydrogen peroxide (H2O2) as a catalyst and using microbubbles generated by a linear mixer pipe can significantly increase the biodegradability and reduce the mass of sludge. Key results include an oil content reduction from 77.48% to 51.7% after ozonation. Mixed liquor suspended solids (MLSS) and mixed liquor volatile suspended solids (MLVSS) were also reduced, while COD and NH4+ levels increased. The linear mixer pipe was found to be more effective for microbubble generation and sludge treatment than a jet
This presentation summarizes the role of pretreatment processes in enhancing anaerobic digestion of municipal solid waste. Various pretreatment methods including mechanical, thermal, chemical and combinations are discussed. A case study on microbial pretreatment of lignocellulosic waste showed improved biogas and methane production. Pretreatments can increase biodegradability, biogas yields, degradation rates and reduce retention times compared to untreated processes. Thermal pretreatments at low temperatures are often most cost-effective.
“Sustainability requires conservation of environmental resources, such as maintaining the quality of water resources, soil, air and forests; conservation of genetic diversity; and efficient use of energy, water and natural materials. Improving the efficiency of production mechanisms, in order to reduce the per capita consumption of natural resources and stimulate change in technologies and production of non-polluting consumption materials. All countries are over-invoked prevent environmental pollution through enforcement of environmental protection laws, promote technologies with low waste generation, and predict the impact of new technologies, products and wastes”.
Development of an experimental rig for bioremediation studiesAlexander Decker
The document describes the development of an experimental rig for bioremediation studies using indigenous technology. Key details include:
- The rig consists of various units like air pretreatment, fixed bed bioreactors, volatile organic compound traps, air flow meter, and carbon dioxide traps.
- Components were sized, designed, and fabricated locally at low cost. Testing showed the rig effectively degraded 75% of oil and grease from contaminated soil over 10 weeks.
- The rig was used to study bioremediation of soil contaminated with spent motor oil in 6 treatments with various additives over room temperature.
Biopolymer Technology for Cooling Water Treatment -AIWW conference 2015Irma Steemers-Rijkse
1. The document describes biopolymer technology developed by Novochem Water Treatment as an alternative to traditional toxic and non-biodegradable water treatment chemicals like zinc, polyacrylates, phosphonates and phosphates.
2. The biopolymer technology is based on biodegradable polymers from agricultural sources that effectively stabilize hardness and inhibit corrosion through hydrophobic film formation on metal surfaces.
3. Case studies show conversions from polyphosphate and all-organic programs to Novochem's biopolymer programs improved cooling water system performance, meeting discharge limits while reducing corrosion, scale, and maintenance costs.
The biological wastewater treatment processes reproduce the natural purification processes that occur in water bodies. They involve microorganisms like bacteria, protozoa, fungi, algae, and worms that convert organic matter into inert products. Understanding the microbiology is essential for optimizing treatment system design and operation. Historically, design was empirical but modern multidisciplinary engineering incorporates biology for a more rational understanding of the processes.
The biological wastewater treatment processes reproduce the natural purification processes that occur in water bodies. They involve microorganisms like bacteria, protozoa, fungi, algae, and worms that convert organic matter into inert products. Understanding the microbiology is essential for optimizing treatment system design and operation. Historically, design was empirical but incorporating biology has increased understanding, efficiency, and reduced costs. The main groups of microorganisms involved and their roles are discussed.
Similar to Cavitation based PI technology for Wastewater Treatment.pptx (20)
Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapte...University of Maribor
Slides from talk presenting:
Aleš Zamuda: Presentation of IEEE Slovenia CIS (Computational Intelligence Society) Chapter and Networking.
Presentation at IcETRAN 2024 session:
"Inter-Society Networking Panel GRSS/MTT-S/CIS
Panel Session: Promoting Connection and Cooperation"
IEEE Slovenia GRSS
IEEE Serbia and Montenegro MTT-S
IEEE Slovenia CIS
11TH INTERNATIONAL CONFERENCE ON ELECTRICAL, ELECTRONIC AND COMPUTING ENGINEERING
3-6 June 2024, Niš, Serbia
DEEP LEARNING FOR SMART GRID INTRUSION DETECTION: A HYBRID CNN-LSTM-BASED MODELgerogepatton
As digital technology becomes more deeply embedded in power systems, protecting the communication
networks of Smart Grids (SG) has emerged as a critical concern. Distributed Network Protocol 3 (DNP3)
represents a multi-tiered application layer protocol extensively utilized in Supervisory Control and Data
Acquisition (SCADA)-based smart grids to facilitate real-time data gathering and control functionalities.
Robust Intrusion Detection Systems (IDS) are necessary for early threat detection and mitigation because
of the interconnection of these networks, which makes them vulnerable to a variety of cyberattacks. To
solve this issue, this paper develops a hybrid Deep Learning (DL) model specifically designed for intrusion
detection in smart grids. The proposed approach is a combination of the Convolutional Neural Network
(CNN) and the Long-Short-Term Memory algorithms (LSTM). We employed a recent intrusion detection
dataset (DNP3), which focuses on unauthorized commands and Denial of Service (DoS) cyberattacks, to
train and test our model. The results of our experiments show that our CNN-LSTM method is much better
at finding smart grid intrusions than other deep learning algorithms used for classification. In addition,
our proposed approach improves accuracy, precision, recall, and F1 score, achieving a high detection
accuracy rate of 99.50%.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Advanced control scheme of doubly fed induction generator for wind turbine us...IJECEIAES
This paper describes a speed control device for generating electrical energy on an electricity network based on the doubly fed induction generator (DFIG) used for wind power conversion systems. At first, a double-fed induction generator model was constructed. A control law is formulated to govern the flow of energy between the stator of a DFIG and the energy network using three types of controllers: proportional integral (PI), sliding mode controller (SMC) and second order sliding mode controller (SOSMC). Their different results in terms of power reference tracking, reaction to unexpected speed fluctuations, sensitivity to perturbations, and resilience against machine parameter alterations are compared. MATLAB/Simulink was used to conduct the simulations for the preceding study. Multiple simulations have shown very satisfying results, and the investigations demonstrate the efficacy and power-enhancing capabilities of the suggested control system.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Low power architecture of logic gates using adiabatic techniquesnooriasukmaningtyas
The growing significance of portable systems to limit power consumption in ultra-large-scale-integration chips of very high density, has recently led to rapid and inventive progresses in low-power design. The most effective technique is adiabatic logic circuit design in energy-efficient hardware. This paper presents two adiabatic approaches for the design of low power circuits, modified positive feedback adiabatic logic (modified PFAL) and the other is direct current diode based positive feedback adiabatic logic (DC-DB PFAL). Logic gates are the preliminary components in any digital circuit design. By improving the performance of basic gates, one can improvise the whole system performance. In this paper proposed circuit design of the low power architecture of OR/NOR, AND/NAND, and XOR/XNOR gates are presented using the said approaches and their results are analyzed for powerdissipation, delay, power-delay-product and rise time and compared with the other adiabatic techniques along with the conventional complementary metal oxide semiconductor (CMOS) designs reported in the literature. It has been found that the designs with DC-DB PFAL technique outperform with the percentage improvement of 65% for NOR gate and 7% for NAND gate and 34% for XNOR gate over the modified PFAL techniques at 10 MHz respectively.
Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
A review on techniques and modelling methodologies used for checking electrom...nooriasukmaningtyas
The proper function of the integrated circuit (IC) in an inhibiting electromagnetic environment has always been a serious concern throughout the decades of revolution in the world of electronics, from disjunct devices to today’s integrated circuit technology, where billions of transistors are combined on a single chip. The automotive industry and smart vehicles in particular, are confronting design issues such as being prone to electromagnetic interference (EMI). Electronic control devices calculate incorrect outputs because of EMI and sensors give misleading values which can prove fatal in case of automotives. In this paper, the authors have non exhaustively tried to review research work concerned with the investigation of EMI in ICs and prediction of this EMI using various modelling methodologies and measurement setups.
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
Using recycled concrete aggregates (RCA) for pavements is crucial to achieving sustainability. Implementing RCA for new pavement can minimize carbon footprint, conserve natural resources, reduce harmful emissions, and lower life cycle costs. Compared to natural aggregate (NA), RCA pavement has fewer comprehensive studies and sustainability assessments.
3. INTRODUCTION
• Process intensification (PI) is a way to revolutionize the chemical
process industry in terms of its approach and addresses the issue of
sustainability.
• It can significantly improve energy and process efficiency by
enhancing mixing, mass and heat transfer as well as driving forces.
• Cavitation has been used effectively for process intensification.
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4. CAVITATION
• It is the formation and collapsing of cavities or bubbles in a liquid
mostly developed in the areas which have relatively low pressure.
• Cavitation is categorized into four types on the basis of way of
generation of cavity:
Acoustic
Hydrodynamic
Optic
Particle
• Among these techniques, Hydrodynamic and Acoustic cavitation has
been effective for the desired physico-chemical transformation on a
commercial scale.
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5. PRINCIPLE
• Cavitation is a physico -chemical phenomenon of sequential
generation, development and collapse of the huge amount of
microscopic cavities in liquid medium
• These collapse of cavities release large amount of energy over an
extremely small interval of time
• The energy release is in the format of high temperature and high
pressure.
• The cavitation phenomena involve the generation of free radicals,
local hot spots and microturbulence.
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7. ACOUSTIC CAVITATION
• It is due to pressure variations in the liquid when ultrasonic sound
waves propagate through it which consist of compression and
rarefaction phase.
• In rarefaction cycles, the negative acoustic pressure pulls liquid
molecules apart from each other and creates the void in the liquid after
exceeding the critical molecular distance which leads to the formation
of cavities.
• In the compression cycle, acoustic positive pressure pushes the
molecules together and compresses the cavities which collapse in
fraction of time under near adiabatic condition.
• Thus produces high local temperature and pressure condition for small
interval of time (millisecond to microsecond)
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DRAWBACKS
Difficult to use in large scale operation.
Higher operating cost.
Low energy efficiency as compared to hydrodynamic cavitation.
Figure 2: Acoustic cavitation
9. HYDRODYNAMIC CAVITATION
• Liquid passes through the constriction such as an orifice or a venturi
at which kinetic velocity increases at the cost of pressure.
• As pressure drops below vapor pressure, the cavity forms at the throat
of the constriction which get imploded during the pressure recovery in
the downstream of the constriction.
• The cavity implosion results in to very high local energy density also
known as hot spot containing high temperature about 10,000 K and
pressures of 1000 atm.
• This extreme conditions produces the highly reactive free radicals and
enhances mass transfer due to turbulence by cavity collapse.
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Figure 3: Hydrodynamic Cavitation
It is found to be a good alternative to the acoustic cavitation due to its:
High energy efficiency
High cavitation activities
Easy to scale-up
Cost effectiveness
11. ROLE OF CAVITATION IN PI
• To achieve chemical, physical and biological transformation using
conventional approaches involved various limitations such as higher
time, temperature and pressure, required huge amount of toxic
solvents, catalyst and unsatisfactory yields (from commercial angle)
• It has been proved that, use of cavitation can process the reactions that
are naturally slow.
• Cavitationally assisted physico -chemical transformations include
improved selectivity, without or non-hazardous solvents, less energy
consumption and the reaction time
• A significant degree of PI can be achieved by acoustic or
hydrodynamic cavitation.
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12. APPLICATIONS
• In food industry, Acoustic cavitation has been widely applied to aid the
extraction of components of interest from plant sources.
• Preparation of different types of emulsion.
• Effectively utilized for wastewater treatment containing
pharmaceutical discharges, pesticides, dyes and other complex organic
compounds.
• Process intensification of chemical transformation/chemical synthesis.
• Cavitation based depolymerization is a convenient approach to reduce
the molecular weight of the polymers.
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13. WASTEWATER TREATMENT
• The water is getting severely polluted by the hazardous chemicals
discharged from chemical industries such as pesticides, dyes and
textiles etc.
• Their existence in the effluent wastewater even in very small
concentrations is harmful to animals and human beings.
• Over the ages, various techniques such as biological methods,
membrane-based processes, and advanced oxidation processes
(AOP’s) such as photocatalysis, cavitation have been used especially
for the destruction of the bio-refractory pollutants.
• AOP’s can form highly oxidative hydroxyl radicals (●OH) which can
easily oxidize inorganic as well as organic toxic pollutant. Among all
the AOP’s, cavitation is the most energy efficient technique.
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14. MECHANISM
• When exposed to cavitation, the cavities will form and collapse which
creates local hot spots of extremely high temperature and pressure.
• Water molecule dissociate into hydroxyl radicals (●OH) which has
very high oxidation potential and able to oxidize pollutant molecule
present in the wastewater.
• Mainly through two mechanisms:
Thermal decomposition of the volatile pollutant molecule.
Reaction of pollutants with ●OH radicals(chemical effect).
• The high intensity of shockwaves formed due to the asymmetric
collapse of the cavity can easily break big pollutant molecule into
small (intermediate) molecules (physical effect).
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15. REACTIONS
The following series of reactions occur during the oxidation of organic
pollutant molecules using cavitation :
H2O +))) ●H + ●OH (1)
●H + ●H H2 (2)
●OH + ●OH H2O2 (3)
●OH + organic molecules CO2 + H2O + some intermediates (4)
Thus, cavitation can also be used as a pretreatment method.
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16. ADVANTAGES
• Pre-treatment with cavitation, followed by the conventional methods
can improve the degradation efficiency.
• Hydrodynamic Cavitation(HC) approach has been tested at an
industrial scale to degrade various organic and inorganic pollutants.
• The combination of HC with AOPs provide the synergetic effect and
gives the desirable outputs, also overcoming the weaknesses of single
AOP techniques.
• The waste streams containing bio-refractory pollutants can be treated
successfully using cavitation.
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17. WATER DISINFECTION
• As cavitation generates hot spots, highly reactive free radicals and
microturbulence associated with acoustic streaming.
• It involves a combination of mechanisms:
1. Mechanical effects
2. Chemical effects
3. Heat effects
• Non-chemical method and does not form any toxic byproducts.
• Energy efficient process.
• Thus can be considered as a process intensification technique for a
large scale water disinfection.
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18. Figure 4 : Conditions for cell disruption during disinfection by
cavitation
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19. ADVANTAGES
• The combination of hydrogen peroxide or ozone with cavitation is
found to increase the efficacy of the destruction of bacteria.
• It can reduce the consumption of chemical disinfectants substantially
in the case of water disinfection.
• It reduces treatment times and the chemical consumption under
optimized conditions.
• It also reduces the formation of the harmful disinfection by-products.
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20. REFERENCE
• Holkar, C.R., Jadhav, A.J., Pinjari, D.V. and Pandit, A.B., 2019. Cavitationally driven
transformations: A technique of process intensification. Industrial & Engineering Chemistry
Research, 58(15), pp.5797-5819.
• Kosel, J., Gutiérrez-Aguirre, I., Rački, N., Dreo, T., Ravnikar, M. and Dular, M., 2017. Efficient
inactivation of MS-2 virus in water by hydrodynamic cavitation. Water research, 124, pp.465-471.
• Burzio, E., Bersani, F., Caridi, G.C.A., Vesipa, R., Ridolfi, L. and Manes, C., 2020. Water
disinfection by orifice-induced hydrodynamic cavitation. Ultrasonics sonochemistry, 60, p.104740.
• Dindar, E., 2016. An overview of the application of hydrodinamic cavitation for the intensification
of wastewater treatment applications: a review. Innovative Energy & Research, 5(137), pp.1-7.
• Ponce-Ortega, J.M., Al-Thubaiti, M.M. and El-Halwagi, M.M., 2012. Process intensification: new
understanding and systematic approach. Chemical Engineering and Processing: Process
Intensification, 53, pp.63-75.
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