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 “"sewage treatment plant"”.
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Simulation and optimization of a package sewage treatment plant
… and optimize an Aquatair Model P-3 package sewage treatment plant for which operating data from the National Sanitation Foundation was available. The treatment plant consists essentially of a plastic medium trickling filter mounted overtop of a complete-mix activated sludge (CMAS) tank; the …
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An investigation of the operating characteristics and efficiency of a small sewage treatment plant
… primarily a study of the performance of the new sewage treatment plant serving Blacksburg, Virginia and V. P. I. during the initial period of operation, 1948-1949. This plant, designed for a sewage flow of one million gallons per day, provides primary and secondary treatment. Standard analyses …
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Effects of sewage treatment plant effluents on mollusks and fish of the Clinch River in Tazewell County, Virginia
… assemblages, including many endemic species. New sewage treatment plants (STP's) have recently been constructed along the Clinch River in Virginia, raising concern because of the disappearance of mollusks below existing STP's. Field and laboratory studies were conducted to determine mollusk and …
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A Comparison of Some Limnological Changes Caused By The Brookings Sewage Treatment Plant On Six-mile Creek and the Big Sioux River
… there was an abundant supply of fresh water, sewage disposal became a growing problem. The easiest way to get rid of the sewage was to dump it into the stream below the town and let the current wash it away. This practice is still continued, even in some modern cities. (See more in Text)
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Modelagem hidrodinâmica de decantador primário de esgotos utilizando-se a técnica de traçadores
… on the Hydrodynamic of a primary settler of sewage treatment plant, type sludge activated through the evaluation of parameters obtained by the use of tracers. The technique employed in obtaining the data consisted in the injection of radioactive tracer (Brome-82) as well as fluorescent …
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An investigation of the methods used in the determination of the chlorine demand of settled sewage
… which exist in the settled domestic sewage at the V.P.I. Sewage Treatment Plant between the limits of one and seven ppm, of applied chlorine dosage were determined.
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The removal of organic waste matter from secondary sewage effluents by chemical coagulation
… effluent, collected from the same municipal sewage-treatment plant, and b) On a maturation pond effluent collected from a different municipal sewage-treatment plant. The inorganic coagulants alum, ferric chloride and lime as well as organic polyelectrolytes were tested for their ability to …
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Agricultural and forest land runoff in upper South River near Waynesboro, Virginia
… oxygen demand and total nitrogen. The Waynesboro sewage treatment plant supplied the greatest phosphorus loading. In comparison with forest drainage, agricultural land drainage was found to be a greater source of all materials monitored. Urban runoff was not analyzed separately, but it appears to …
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Uso de traçadores na modelagem de unidades de aeração e decantação em estação de tratamento de esgotos
… basin of a conventional activated sludge sewage treatment plant. Amidorhodamine G Extra and Bromine-82 were used as fluorescent and radioactive tracers. The hydrodynamic behaviour of both units were analysed through the comparison of experimental response curves with well known models. A …
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A Survey of Pollution on Selected Streams in the Black Hills of South Dakota
… streams. The sources of pollution included both sewage treatment plant effluents and mining wastes. A comparison of the benthic fauna community below a pollution source to that above it was the primary basis for evaluating the effect of the pollution source on the stream. The results of the …
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A genetic basis for life history differences among populations of the midge, Chironomus riparius (Diptera:Chironomidae)
… the final clarifier at the Madison, Wisconsin sewage treatment plant showed a pattern of low growth rate and high mortality rate. When several populations were transplanted into a high chlorine environment at the Blacksburg, Virginia sewage treatment plant, the population that had been …
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Electrodisinfection of Municipal Wastewater Effluent
To avoid the spread of disease from sewage treatment effluents, pathogenic microorganisms present must be destroyed by one or a combination of disinfection methods. Chlorine remains the predominant disinfectant used although it consumes considerable amounts of energy and has associated exposure …
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Aquatic microbial community responses to stress: comparison of nontaxonomic and taxonomic indices
… microbial communities exposed to municipal sewage treatment plant (STP) effluent were monitored. The STP effluent produced increased adenylate concentrations, ATP/ADP and ATP/Chla ratios, and decreased Chla, Chla/Pheo, d, and species richness relative to upstream reference communities. …
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Chemical treatment of anaerobic digester supernatant
… concentrated waste stream, to the headworks of a sewage treatment plant has long been suspected and recognized as being detrimental to the wastewater treatment process. This study was concerned with the removal of phosphorus, nitrogenous, and carbonaceous pollutants from the supernatant by use of …
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Phosphorus in the Environment and its Role in Anaerobic Iron Corrosion
… originate in steel-making or thermal phosphorus plants. It was determined that reduced phosphorus would not be detected in routine environmental analyses even if they were present. A new method was developed to detect these compounds, and in a preliminary survey reduced phosphorus was proven to …
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The Food Habits of Redbreast Sunfish in the San Marcos River, Texas
… from the area receiving effluent from a sewage treatment plant was considered to be an effect of the effluent.
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Studies on the metabolism of polyhydroxyalkanoic acid and phosphate in the biological excess phosphate removal process
… of PHA in both functional and non-functional sewage treatment plant conditions. The role of nutrients was studied by testing the effects on PHA of nutrient combinations which would be expected to affect the level of NADH. Despite previous correlation between PHA storage and phosphate …
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Availability and distribution of nitrogen and phosphorus from sewage sludge in the plant-soil-water continuum
… Hapludult) soils. An aerobically·digested sewage sludge from a sewage treatment plant with major industrial irrputs was applied at rates of 0, 42, and 84 dry Mg ha' 1 on the poorly-drained Acredale soil. Rates of 0, 42, 84, 126, 168, and 210 dry Mg ha'1 were applied on the well-drained …
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