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CRITICAL EVALUATION OF LEACHATE CLOGGING POTENTIAL IN GRAVITY COLLECTION SYSTEMS AND MANAGEMENT SOLUTIONS
Title
CRITICAL EVALUATION OF LEACHATE CLOGGING POTENTIAL IN GRAVITY COLLECTION SYSTEMS AND MANAGEMENT SOLUTIONS.
Creator
Shaha, Bishow Nath, Meeroff, Daniel E., Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
Abstract/Description
Leachate clogging in the Leachate Collection System (LCS) due to chemical precipitations and biofilms produced by microbial activities is a common phenomenon in any Municipal Solid Waste (MSW) landfill. This study focuses on quantifying the factors that impact the micro-environment of leachate; and microbial activities that help the precipitates to form and attach to the LCS. It also evaluates the performance of operational changes that have been implemented or the potential alternatives and...
Show moreLeachate clogging in the Leachate Collection System (LCS) due to chemical precipitations and biofilms produced by microbial activities is a common phenomenon in any Municipal Solid Waste (MSW) landfill. This study focuses on quantifying the factors that impact the micro-environment of leachate; and microbial activities that help the precipitates to form and attach to the LCS. It also evaluates the performance of operational changes that have been implemented or the potential alternatives and recommends the possible measures to reduce the severity of clogging. A field scale side-by-side pipe network, and several laboratory setups were used in this study. Calcite is identified to be the predominant phase present in the precipitates using XRD/XRF analysis which, concur with the previous studies. Microbial growth and activities enhance the precipitation of CaCO3 in LCS. Clogging in LCS pipes can be controlled if not eliminated by continuous monitoring along with frequent cleaning with physiochemical processes.
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Date Issued
2020
PURL
http://purl.flvc.org/fau/fd/FA00013493
Subject Headings
Leachate, Solid waste management, Sanitary landfills, Calcite, Leachate--Purification
Format
Document (PDF)
LANDFILL LEACHATE TREATMENT BY ADVANCED ELECTROCHEMICAL OXIDATION PROCESS COUPLED WITH PRETREATMENTS
Title
LANDFILL LEACHATE TREATMENT BY ADVANCED ELECTROCHEMICAL OXIDATION PROCESS COUPLED WITH PRETREATMENTS.
Creator
Salek, Md Fahim, Meeroff, Daniel, Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
Advanced electrochemical oxidation processes have emerged as a promising method for the destruction of persistent organic material in variable waste streams. Although the process has been successfully employed for wastewater treatment applications, high energy requirements, and the risk of formation of undesirable by-products may limit its application in the field of leachate treatment. This study focuses on the investigation of the feasibility of removing organics and ammonia by...
Show moreAdvanced electrochemical oxidation processes have emerged as a promising method for the destruction of persistent organic material in variable waste streams. Although the process has been successfully employed for wastewater treatment applications, high energy requirements, and the risk of formation of undesirable by-products may limit its application in the field of leachate treatment. This study focuses on the investigation of the feasibility of removing organics and ammonia by electrochemical oxidation coupled with ozone, Fenton or lime. Landfill leachate was treated by two different bench scale electrochemical oxidation reactors coupled with ozone oxidation, Fenton coagulation or lime precipitation. The electrochemical oxidation was conducted using a titanium anode coated with multi-metal oxides (MMO) at three-different current densities for different durations. Treatment performance was determined based on the removal of COD, ammonium-N, and turbidity. A three-level factorial design was established, and response surface methodology (RSM) was introduced to determine the optimum process parameters. The results suggest that the process can remove appreciable amounts of ammonium-N and COD in a very short time, demonstrating that the process is effective in rapidly degrading recalcitrant organics in leachate.
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Date Issued
2019
PURL
http://purl.flvc.org/fau/fd/FA00013343
Subject Headings
Leachate--Purification, Electrochemistry, Oxidation, Fenton, Ozone, Lime
Format
Document (PDF)
Optimization of TiO2 photocatalyst in an advanced oxidation process for the treatment of landfill leachate
Title
Optimization of TiO2 photocatalyst in an advanced oxidation process for the treatment of landfill leachate.
Creator
Youngman, Frank., College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
Since the United States Environmental Protection Agency (USEPA) began requiring landfills to implement a leachate collection system in 1991, the proper disposal of leachate has become a growing concern. The potential toxicity of landfill leachate will contaminate groundwater and soil if not managed properly. Research has been made in efforts to manage leachate in a cost-effective, single treatment process. Photocatalytic oxidation is an advanced oxidation process (AOP) which has shown ability...
Show moreSince the United States Environmental Protection Agency (USEPA) began requiring landfills to implement a leachate collection system in 1991, the proper disposal of leachate has become a growing concern. The potential toxicity of landfill leachate will contaminate groundwater and soil if not managed properly. Research has been made in efforts to manage leachate in a cost-effective, single treatment process. Photocatalytic oxidation is an advanced oxidation process (AOP) which has shown ability to reduce toxicity of an array of leachate constituents including organics, inorganics and heavy metals. The purpose of this manuscript is to scale up the batch scale study of TiO2 photocatalytic degradation of leachate utilizing a pilot scale falling film reactor. In this research project, the use of UV/TiO2 for the removal of chemical oxygen demand (COD), ammonia, alkalinity and color will be studied in order to optimize catalyst dosage, determine pH effects and reaction kinetics and develop preliminary cost estimates.
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Date Issued
2013
PURL
http://purl.flvc.org/fcla/dt/3361260
Subject Headings
Sanitary landfills, Leaching, Environmental aspects, Refuse and refuse disposal, Environmental aspects, Integrated solid waste management, Leachate, Purification, Hazardous wastes, Biodegradation
Format
Document (PDF)
Safe Discharge of Landfill Leachate to the Environment
Title
Safe Discharge of Landfill Leachate to the Environment.
Creator
Lakner, Joseph, Meeroff, Daniel E., Florida Atlantic University, College of Engineering and Computer Science, Department of Civil, Environmental and Geomatics Engineering
Abstract/Description
The objective of this research was to determine if mature landfill leachate could be treated to a level so that it was safe to discharge to the environment. The treatment method was an Advanced Oxidation Process. The process utilized Titanium Dioxide and UV. Three different reactor types were used, falling film, flow through and falling film + Electron Magnetic Oxygen Hydrogen (EMOH). To improve removal pre-treatment with titanium dioxide settling were conducted in conjunction with treatment...
Show moreThe objective of this research was to determine if mature landfill leachate could be treated to a level so that it was safe to discharge to the environment. The treatment method was an Advanced Oxidation Process. The process utilized Titanium Dioxide and UV. Three different reactor types were used, falling film, flow through and falling film + Electron Magnetic Oxygen Hydrogen (EMOH). To improve removal pre-treatment with titanium dioxide settling were conducted in conjunction with treatment in a reactor. The best removal was obtained with pre-treatment with titanium dioxide settling, followed by the falling film + EMOH reactor. In 8 hours, removal was 63% for COD, 53% for ammonia, 73% for alkalinity and 98% for calcium hardness. The kinetics found in this experiment show that full treatment times for safe discharge vary between contaminates. For complete removal of all tested contaminates to safe discharge regulations requires 185 hour of treatment.
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Date Issued
2015
PURL
http://purl.flvc.org/fau/fd/FA00004515, http://purl.flvc.org/fau/fd/FA00004515
Subject Headings
Hazardous wastes -- Biodegradation, Leachate -- Purification, Oxidation, Phytoremediation, Sanitary landfills -- Health aspects, Sanitary landfills -- Leaching -- Environmental aspects, Sanitary landfills -- Management, Titanium dioxide -- Industrial applications
Format
Document (PDF)