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 34 for “"Taste-and-Odor"”.
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Harmful algae, algal toxin, taste and odor control and mitigation in public water system
… (MCs), mainly MC-LR, cylindrospermopsin (CYN), and taste and odor (T&O) compounds. Various types of chemicals are widely used in drinking water treatment plants as oxidants for treating source water challenged with harmful algal blooms. In this study, the release and degradation of intracellular …
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Destruction of algae-produced taste-and-odor compounds by chlorine, potassium permanganate, and chlorine dioxide
Most taste-and-odor problems in the United States are caused by algal blooms in rivers and reservoirs. In the past, most of the attention has been focused on the formation of geosmin and MIB by blue-green algae (cyanobacteria), which cause earthy and musty odors, respectively. Little work has been …
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The effects of the High Park fire on Cache la Poudre drinking water quality
… of the fire not only impacted the vegetation and soil within the watershed, but also induced changes in the water quality of the Poudre River, a local drinking water source. The utilities and food and beverage producers were concerned that the fire might impart a smoky flavor and other taste …
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Evaluation of the use of powdered activated carbon for the control of organic compounds during drinking water treatment
… 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 properties of PAC could more effectively be used in …
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The Development of Anticipatory Nausea in Cancer Chemotherapy: A Prospective Longitudinal Analysis
… outpatients were interviewed immediately before and after each of their chemotherapy infusions through at least their first six months of treatment. Three major issues were focused upon, (a) identification of factors which distinguish patients who develop anticipatory nausea from those who do …
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Drying and ripening of soybeans for beneficiation of soybean products
The object of this investigation was to ripen and dry soybeans in such a way as to prevent the formation of bad taste and odor in the oil. Field run soybeans were treated in specially constructed gas-tight silos through which mixtures of air, carbon dioxide, and ethylene in varying concentrations …
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Evaluation of Dechlorinating Agents and Disposable Containers for Odor Testing of Drinking Water
… by regulations, aesthetically unappealing taste-and-odor problems have led consumers to search for alternative water sources, such as bottled water or tap water processed by point-of-use filters. Consequently, taste-and-odor monitoring has become important to the drinking water industry. …
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Identification and characterization of odorous metabolites produced by selected freshwater algae
The occurrence of taste-and-odor problems that are caused by algal metabolites in water supplies has been well documented. Several commonly occurring odor-producing algae were selected and cultured for this research. Initial studies involved the algal cells and cell-free media from cultures grown …
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A questionnaire and a concentrator sampling technique used to evaluate water quality degradation in water distribution systems
… the results of a questionnaire were analyzed and a sampling technique utilizing a concentrator was evaluated. A questionnaire, completed by water treatment plant operators in Virginia, was analyzed to ascertain what complaints regarding water quality were being received and what the causes of …
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Influence of Chlorination and the Distribution System on Mutagens in a Potable Water Supply
… reversion assay showed both promutagenic and direct-acting responses in TA98. Examination of the water at the groundwater source, following treatment and after passage through the distribution system, revealed that the level of both direct and activatable mutagenicity increased within the …
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Cyanobacteria Abundance and Toxin Production in a Drinking Water Supply Reservoir
… are prokaryotic organisms that live in marine and freshwater environments and are most common during the warmer months. Many cyanobacteria are also known to release toxins that target cellular processes and affect a wide range of organisms, including people. Although the effects of toxins on …
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Expected impacts of climate change on water and wastewater treatment in the Eastern Ontario region
… The intensity of extreme precipitation events and droughts is expected to increase, creating stress on the water and wastewater infrastructure. The objective of this study is to assess the potential impacts of climate change on the existing water and wastewater treatment infrastructure in rural …
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Decision Support Tool for Optimal Replacement of Plumbing Systems
… distribution system managed by municipalities and water utilities the costs are distributed among all subscribers. The home plumbing repair/replacement cost and possible water damage cost must be addressed by the home owner. There are also issues of the value of home, insurance rates, health …
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The growth promoting effect of 2,4-Dichlorophenoxyacetic acid (2,4-D) and 2,4,5-Trichlorophenoxyacetic acid (2,4,5-T) on Microcystis aeruginosa
… from blooms of the alga include: death of fish and other aquatic life, clogging of filter systems in water treatment plants, taste and odor problems, and death of cattle and water fowl via extracellular polypeptides. Blooms of this nuisance alga have historically occurred in waters receiving …
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Two Issues in Premise Plumbing: Contamination Intrusion at Service Line and Choosing Alternative Plumbing Material
… water distribution infrastructure system is old and deteriorating. A water system with its myriad appurtenances (including pumps and valves and tanks) is susceptible to hydraulic transients resulting in high and low pressure waves alternatively passing through the network. While both low and high …
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Analysis of Organic and Inorganic Parameters in Southern Virginia Rivers Following a Coal ash Spill
… using the Dan River experienced a series of taste and odor (TandO) events described as "earthy" or "musty". Similar TandO events were not documented before the coal ash spill. This research attempted to understand causes of the TandO events and if the coal ash spill was connected. A variety …
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Greenhouse and laboratory study for the land application of water treatment residual
… attention due to a lack of regulation, funding, and concern about their environmental impacts. Many treatment plants discharge alum residual directly into nearby water courses or dewater them for landfilling. If suitable land is available, land application of residual is cost effective and has …
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Locational and temporal patterns in microorganisms potentially affecting water quality in the Dan River system
River ecosystems across the US and globally face numerous stressors that impact both ecological function and water quality. In 2015-16, municipalities along the Dan River in southern Virginia experienced repeated taste and odor (TandO) issues in their drinking water that originated from the river …
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A Water Quality Assessment of the Occoquan Reservoir and its Tributary Watershed: 1973-2002
… has developed over the years from rural land uses to metropolitan suburbs within easy commuting distance from Washington, DC. Due to this urbanization, the Occoquan Reservoir is especially vulnerable to hypereutrophication, which results in problems such as algal blooms (including …
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Effects of a surface circulator on temperature, dissolved oxygen, water velocity, and photosynthetic yield in Falling Creek Reservoir
… leads to the potential for cyanobacteria blooms, and because of taste and odor problems, as well as possible toxin production associated with certain species of cyanobacteria, these organisms can cause major problems in drinking water production. The Western Virginia Water Authority installed a …
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