Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 3590 for “""Water Treatment Residuals""”.
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An evaluation of lime residuals management alternatives for water utilities
… softening to remove hardness from the drinking water. Lime softening generates residuals as part of the water treatment process, which are inert and non-hazardous. This report provides an environmental and economic evaluation of three lime residuals disposal alternatives: a registered disposal …
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Properties of Waste Resulting from Arsenic Removal Processes in Drinking Water Treatment
… maximum contaminant level (MCL) for drinking water is likely to be lowered sometime in 2001 or 2002. If the MCL is lowered, it is speculated that there will be stricter limits imposed on the disposal and handling of arsenic-containing residuals. The purpose of this study is to determine the …
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Effectiveness of Disinfectant Residuals in Distribution Systems
In many drinking water systems in the United States, disinfectant is added to water as it leaves the plant to maintain a residual concentration in the distribution system. The disinfectant residual is maintained to inactivate contamination that enters the distribution system, to control biofilms, …
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Groundwater effects of land applied alum residuals
… and Slagle soils had various amounts of alum residuals, lime and plant nutrients incorporated into the topsoil. A weekly dose of rainwater was applied to each column over a six month period. Leachate and soil constituents were analyzed to evaluate migration of specific constituents from the …
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Evaluating the Leachability of Elements from Residuals Generated by Hydraulic Fracturing in Marcellus Shale
… drilling mud, treated sludge from the chemical treatment of process water, solids from the gravity settling of produced water, and sludge solidified prior to disposal in a municipal landfill. Cement kiln dust (CKD), used for solidification, was also considered in this study. All samples were …
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Water treatment analysis guide
The treatment of water up to potable/drinkable standards is a complex process, with many variables and parameters impacting on each other. In South Africa drinking water delivered to consumers must meet the requirements as recorded in the South African National Standards (SANS). Today, more so than …
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Leaching from High Capacity Arsenic-Bearing Solid Residuals under Landfill Conditions
… is a naturally occurring contaminant in ground water. The link between human exposure to elevated levels of arsenic and the increase in cancerous and non-cancerous diseases is well documented. Consequently, arsenic removal from drinking water has been thoroughly investigated.Lowering the maximum …
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Sustainable Hydrogels for Water Treatment
A major challenge in water treatment today is the elimination of micropollutants, including low-concentration emerging contaminants like PFAS and heavy metals like lead. Existing technologies like activated carbon adsorption fail to eliminate these contaminants due to their chemical diversity and …
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Geochemical and Isotopic Characterization of Coal Combustion Residuals: Implications for Potential Environmental Impacts
… generate 136 million tons of Coal Combustion Residuals (CCRs) annually, encompassing fly ash, bottom ash, and flue gas desulfurization materials. The range and blends of CCRs varies substantially across coal-fired plants and depends on a unique set of circumstances for each plant and coal …
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Coal Combustion Residuals in Receiving Lake Ecosystems: Trophic Transfer, Toxicity, and Tracers
… the goals of these fields in the context of freshwater pollution by coal-fired power plant (CFPP) effluents, which contribute to the largest point source of environmental pollution in the United States and comprise a substantial threat to receiving ecosystems. CFPPs discharge the by-products of …
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Non-thermal plasma for water treatment
Plasma generated in contact with water has been extensively investigated in various electrode geometries and various discharge types for water treatment, of which the applications have been employed industrially on different scales. The reactive species such as OH radicals, O3, H2O2 and HO2 can be …
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Metal-organic frameworks for water treatment
… application of metal-organic frameworks in waste water treatment and the synthesis of new metal-organic frameworks.<br/><br/>Chapter one gives a general overview of water-treatment processes, the methods and materials used in these processes, and also the structures and properties characteristics …
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MIB Adsorption in Drinking Water Treatment
It was observed that chlorine had a deleterious effect on the ability of both PAC and GAC to adsorb MIB. From this, it was encouraged to avoid contacting activated carbon with chlorine.
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An econometric analysis of the role of air and water residuals in the production technology for steam-generating electric plants
… technology model which accounts for air- and water-borne residuals. Specifically, the objectives of the research are:</p> <ol> <li>to assess the role of air- and water-borne residuals in the production technology of the plants;</li> <li>to estimate the partial elasticities of substitution …
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Arsenic Stability In Fresh and Aged Amorphous Ferric Hydroxide Sludges Generated from Brine Treatment Processes
… that about 6 million pounds of arsenic-bearing residuals (ABSR) will be generated annually in the United States when full compliance with the new standard for arsenic in drinking water (10 μg/L) is realized. Effective management of disposal of ABSR requires both a full characterization of the …
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Enzymes : the new water/wastewater treatment chemical
… routinely in raw and treated municipal wastewater. Conventional wastewater treatment processes are not effective in removing PPCP; therefore, treated wastewater discharges are one of the main entry points for PPCPs into the aquatic environment, and eventually into drinking water supplies. The …
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Cloth Filter for Disaster Relief Water Treatment
… and governments strive to provide safe drinking water to natural disaster survivors as quickly as possible. However, drinking water is typically provided either as bottled water or via mobile water treatment equipment, both of which can be difficult or expensive to transport rapidly into disaster …
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Ozone-bromide-NOM interactions in water treatment
Ozonation (O$\sb3$) of waters containing bromide (Br$\sp{-}$) results in Br$\sp{-}$ oxidation to first hypobromite ion (OBr$\sp{-}$) and its conjugate acid (HOBr), and eventually bromate (BrO$\sb{3\sp{-}}$), a suspected carcinogen. Natural organic matter (NOM) reads with HOBr/OBr$\sp{-}$ to form …
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