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 93 for “"drinking water treatment"”.
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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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Development of adsorption filtration process for virus removal for drinking water treatment
… studies have indicated that many ground water (GW) sources would benefit from the development of effective technologies for removing viruses. Although reverse osmosis can achieve high log removal it is not economical. The main objective of this study is to test and validate a novel …
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Study of filtration for point-of-use drinking water treatment in Nepal
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.
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Determining the removal effectiveness of flame retardants from drinking water treatment processes
… have recently become a concern in the surface water environment. The concern expands to drinking water treatment processes, and whether or not they remove these chemicals while going through the treatment plant. In this study, the concentrations of organophosphoric acid triester flame …
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Properties of Waste Resulting from Arsenic Removal Processes in Drinking Water Treatment
The arsenic 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 …
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The Role of Aluminum within MnOx(s)-Coated Filtration Media in Drinking Water Treatment
The Mn oxide (MnOx(s)) surfaces of water treatment filtration media are known to aid in the capture of dissolved Mn species, but the discovery of significant deposits of Al within these coatings raised several questions about the MnOx(s) surface. A series of experiments and analyses were performed …
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Drinking Water Treatment Waste as an Alternative for Internal Curing and Cement Replacement in Concrete
… cracks which become high permeability routes for water and aggressive ion movement, such as chlorides to reinforcing steel. Drying shrinkage can be controlled by appropriate curing methods, however proper curing does little to affect autogenous shrinkage, especially in low water-to-cementitious …
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Novel electrode fabrication and reactor design for electrocatalytic nitrate and nitrite reduction in drinking water treatment
Nitrate (NO₃⁻) is the most ubiquitous groundwater contaminant in the U.S. and the world. Anthropologic nitrogen fixation for fertilizer production has greatly increased NO₃⁻ concentrations in ground and surface water, polluting drinking water sources and posing health risks to humans. Current go-to …
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Fluorescence Based Approach to Drinking Water Treatment Plant Natural Organic Matter (NOM) Characterization, Treatment, and Management
Natural organic matter present in freshwaters plays a major role in any drinking water treatment facility because of its influence on the performance of treatment stages such as the coagulation-flocculation process and the formation of disinfection by-products (DBP) derived from the NOM-oxidant …
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Interactions Between Heterotrophic and Autotrophic Bacteria in Fixed-Film Biological Processes Used in Drinking Water Treatment
Biological nitrification in water treatment is largely used in Europe to remove ammonia before the final disinfection step. In order to simulate this process in the laboratory, a scaling procedure for biofilm processes was developed and evaluated. Experiments conducted with these laboratory-scale …
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Comparing Ferrous Chloride and Ferrous Sulfate as Secondary Coagulants at the Beaver Water District Drinking Water Treatment Plant
<p>In November 2012, the Beaver Water District (BWD) switched primary oxidants from free chlorine to chlorine dioxide (ClO2) to curb formation of trihalomethanes, a regulated group of organic disinfection byproducts (DBPs). Because ClO2 is reduced to chlorite (ClO2-), a regulated inorganic DBP, BWD …
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Evaluation of the use of powdered activated carbon for the control of organic compounds during drinking water treatment
… activated carbon (PAC) is commonly used in drinking water treatment plants to control taste and odor, and it is available to remove synthetic organic chemicals (SOCs) that must be controlled to meet drinking water standards. The objective of this study was to show how the adsorptive …
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An evaluation of household drinking water treatment systems in Peru : the table filter and the safe water system
… removal. Only 30% of the SWSs tested contained water at or above the WHO-recommended concentration of free chlorine residual (0.2 mg/L). The author recommends that use of these HWTSs continues and that the program receives increased support. The two HWTSs would be most effective if combined: …
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Extracting value from patterns in routinely collected, high-frequency water quality data in rivers supplying drinking water treatment works
… in pronounced differences in the behaviour of water quality parameters on an event-by-event basis, both spatially and temporally. The use of high-frequency water quality monitoring in rivers is an integral part of intake protection for the management of drinking water treatment works. Due to …
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Extracting value from patterns in routinely collected, high-frequency water quality data in rivers supplying drinking water treatment works
… in pronounced differences in the behaviour of water quality parameters on an event-by-event basis, both spatially and temporally. The use of high-frequency water quality monitoring in rivers is an integral part of intake protection for the management of drinking water treatment works. Due to …
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Assessing Biofiltration without Ozonation for Removal of Trihalomethane Precursors in Drinking Water at the Beaver Water District Drinking Water Treatment Plant
… 8 mins would not be helpful unless additional pretreatment steps such as pre-ozonation or a higher chlorine dioxide dose were added prior to the biofilters to increase the amount of biodegradable NOM. Relative to the RSSCTs, the Pilot filters achieved higher average removals of DOC, SUVA254, …
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Understanding the impact of the scavenging capacity on costs of the UV chlorine advanced oxidation process for drinking water treatment using the external calibration method and the development of cost curves.
… removal of recalcitrant organic contaminants in drinking water and wastewater. Establishing the doses of UV and oxidant required to achieve treatment objectives is challenging because many species besides the contaminant(s) of interest exert a scavenging capacity for the highly reactive species …
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