Current Search: Sanitary landfills--Leaching (x)
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(1 - 4 of 4)
- Title
- Improved design methods for evaluating the performance of landfill double liner systems.
- Creator
- Shivashankar, Mirle R., Florida Atlantic University, Fluet, J. E. Jr., Reddy, Dronnadula V., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
- Abstract/Description
-
Many modern landfills are constructed with double liner systems. Leachate leakage rates through double liner systems are calculated using recently developed formulations which are theoretically correct for leakage detection system (LDS) materials that have unrestricted lateral flow properties. But their applicability to geonets, the most commonly used LDS material, has yet to be determined. In double liner systems, the leakage through the primary liner, the properties of the LDS material, and...
Show moreMany modern landfills are constructed with double liner systems. Leachate leakage rates through double liner systems are calculated using recently developed formulations which are theoretically correct for leakage detection system (LDS) materials that have unrestricted lateral flow properties. But their applicability to geonets, the most commonly used LDS material, has yet to be determined. In double liner systems, the leakage through the primary liner, the properties of the LDS material, and the slope of the LDS determine the flow patterns in the LDS. These flow patterns are then used to determine the amount of leachate, if any, which leaks through the bottom liner into the ground. This thesis describes the experimental determination of the flow patterns in the geonets and their relationships to established design formulations.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15197
- Subject Headings
- Sanitary landfills--Leaching, Sanitary landfills--Linings, Geosynthetics
- Format
- Document (PDF)
- Title
- An evaluation of the U.S.E.P.A. model MULTIMED and applicability to hydrogeologic conditions in Florida.
- Creator
- Martin, Robert Floyd, Jr., Florida Atlantic University, Restrepo, Jorge I.
- Abstract/Description
-
The U.S. Environmental Protection Agency's program, MULTIMED, was evaluated using a parametric analysis and result comparisons the with programs MODFLOW and MT3D. The validity and accuracy of the MULTIMED model results were determined and independent parameter sensitivities identified. The dilution calculations in the model are sensitive to several parameters. A parameter determined critical is the seepage velocity which is used in the transport calculations of the model, as well as a "Near...
Show moreThe U.S. Environmental Protection Agency's program, MULTIMED, was evaluated using a parametric analysis and result comparisons the with programs MODFLOW and MT3D. The validity and accuracy of the MULTIMED model results were determined and independent parameter sensitivities identified. The dilution calculations in the model are sensitive to several parameters. A parameter determined critical is the seepage velocity which is used in the transport calculations of the model, as well as a "Near Mixing Factor". Under Florida's aquifer conditions, the Near Mixing Factor as calculated in the model is susceptible to overestimating the dilution of the initial concentration due to relatively high recharge rates and low hydraulic conductivities. Florida's aquifer conditions also typically result in Near Mixing Factor values greater than one, for which the model's analytical solutions are not valid.
Show less - Date Issued
- 1995
- PURL
- http://purl.flvc.org/fcla/dt/15158
- Subject Headings
- Sanitary landfills--Leaching--Computer simulation, Environmental Sciences, Groundwater flow--Florida
- Format
- Document (PDF)
- 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.
Show less - 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)
- Title
- Photochemical Iron-Mediated Aeration Treatment of Landfill Leachate.
- Creator
- Gasnier, Francois, Meeroff, Daniel E., Florida Atlantic University
- Abstract/Description
-
Landfilling is the most common method of solid waste disposal in the United States. However, a reported issue with landfill management is the production of leachate, which is a wastewater that is typically too strong to be discharged to municipal wastewater treatment facilities. After reviewing the performance of existing leachate treatment methods, it is clear that an understanding of emerging issues and an all-inclusive solution to long-term management of leachate is currently not available...
Show moreLandfilling is the most common method of solid waste disposal in the United States. However, a reported issue with landfill management is the production of leachate, which is a wastewater that is typically too strong to be discharged to municipal wastewater treatment facilities. After reviewing the performance of existing leachate treatment methods, it is clear that an understanding of emerging issues and an all-inclusive solution to long-term management of leachate is currently not available. The goal of this project is to address the lack of viable and sustainable engineering alternatives for handling leachate. One such futuristic technology is called Photochemical Iron Mediated Aeration (PIMA). Based on the Iron Mediated Aeration process, the PIMA process involves the combined oxidation effect of hydroxyl radicals and ultraviolet radiation with the air stripping potential of aeration. The experiments conducted demonstrated promising results but also the lack of maturity of this technique.
Show less - Date Issued
- 2007
- PURL
- http://purl.flvc.org/fau/fd/FA00012518
- Subject Headings
- Sanitary landfills--Leaching--Environmental aspects, Refuse and refuse disposal--Environmental aspects, Water--Purification--Filtration, Integrated solid waste management
- Format
- Document (PDF)
