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Characterization of Leachate Clogging Solids
Title
Characterization of Leachate Clogging Solids.
Creator
Harris, Alyssa, Purdy, Denys, Meeroff, Daniel E., College of Engineering and Computer Science
Abstract/Description
The Solid Waste Authority (SWA) of Palm Beach County collects leachate from its landfill in a gravity pipe leachate collection system (LCS), which is experiencing clogging due to calcium carbonate scale. An investigation was conducted to determine the solids composition and provide engineering solutions to this challenge. During testing, it was found that aerated leachate produced foam, which after vibration and evaporation, formed crystalline solids similar to those found in the SWA LCS. The...
Show moreThe Solid Waste Authority (SWA) of Palm Beach County collects leachate from its landfill in a gravity pipe leachate collection system (LCS), which is experiencing clogging due to calcium carbonate scale. An investigation was conducted to determine the solids composition and provide engineering solutions to this challenge. During testing, it was found that aerated leachate produced foam, which after vibration and evaporation, formed crystalline solids similar to those found in the SWA LCS. The following tests were conducted to determine the water quality of the leachate and the properties of the solids: pH, turbidity, chemical reactivity, biological growth, surface characteristics, and microscopic analysis. After five days of evaporation, the solids collected in all samples represented 46-47% of the leachate’s initial weight. On visual observation, the leachate remnants left both a crystalline and a dark slimy solid, with larger particles in the aerated samples, a possible source of the clogging.
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Date Issued
2015
PURL
http://purl.flvc.org/fau/fd/FA00005195
Subject Headings
College students --Research --United States.
Format
Document (PDF)
Removing Methanol Additives from Fracking Fluids
Title
Removing Methanol Additives from Fracking Fluids.
Creator
Meyer, Lisandre, Meeroff, Daniel E., Office of Undergraduate Research and Inquiry
Abstract/Description
Methanol additives used in fracking fluids are harmful to both the environment and to public health. This is because methanol is a hazardous air pollutant and can contaminate the groundwater. The EPA estimates 32.5 tons of methanol is released into the environment each year. The aim of this study is to test the removal efficiency of methanol additives from fracking fluids using advanced oxidation technology with hydrogen peroxide and ultraviolet energy instead of more expensive methods such...
Show moreMethanol additives used in fracking fluids are harmful to both the environment and to public health. This is because methanol is a hazardous air pollutant and can contaminate the groundwater. The EPA estimates 32.5 tons of methanol is released into the environment each year. The aim of this study is to test the removal efficiency of methanol additives from fracking fluids using advanced oxidation technology with hydrogen peroxide and ultraviolet energy instead of more expensive methods such as flash evaporation. The first experiment tested different dilutions of water and methanol (30-1000 ppm) with five percent hydrogen peroxide. Then, the samples were exposed to ultraviolet radiation for several time periods ranging from 30 seconds to 15 minutes. Results showed 97.3% or higher removal at 20 minutes. Continued research in this field will allow for fracking wastewater to be treated effectively, so that it is safe to discharge into the environment.
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Date Issued
2016
PURL
http://purl.flvc.org/fau/fd/FA00005592
Subject Headings
College students --Research --United States.
Format
Document (PDF)
Stucco Removal Engineering
Title
Stucco Removal Engineering.
Creator
Shaw, Brandon, Murphy, Jonathan, Trotsek, Dylan, Meeroff, Daniel E., Cowan, David, College of Engineering and Computer Science
Abstract/Description
Construction workers are exposed to fine particulate inhalation hazards during stucco removal. The ultimate goal of this research is to test a new chemical-assisted method that will reduce workers’ exposures to safer levels. To that end, the minimum specimen size must be determined that will replicate this hazardous work environment. Samples of concrete stucco surfacing material (CSSM) of various sizes ranging from 1-in×1-in. to 8-in.×16-in. were applied to masonry blocks. These specimens...
Show moreConstruction workers are exposed to fine particulate inhalation hazards during stucco removal. The ultimate goal of this research is to test a new chemical-assisted method that will reduce workers’ exposures to safer levels. To that end, the minimum specimen size must be determined that will replicate this hazardous work environment. Samples of concrete stucco surfacing material (CSSM) of various sizes ranging from 1-in×1-in. to 8-in.×16-in. were applied to masonry blocks. These specimens were tested to determine the minimum size needed to produce 150-mg/m3 (one order of magnitude larger than the OSHA exposure limit of 15-mg/m3) of airborne particulate in a 1-m3 test chamber when removed with a chipping hammer. Testing results revealed that 5-in.× 5-in. specimen size yielded on average 180-mg/m3 of particulates.
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Date Issued
2015
PURL
http://purl.flvc.org/fau/fd/FA00005210
Subject Headings
College students --Research --United States.
Format
Document (PDF)