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 71 for “"Waste-water treatment"”.
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Optimal control of a biological waste-water treatment plant
… this paper a mathematical model of a biological waste cleaning plant is created and investigated. The model is described by a nonlinear system of two differential equations with one bounded control. An optimal control problem of minimizing concentration of contaminated water at terminal time T is …
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Assessment of sludge management options in a waste water treatment plant
… began in response to a request by the Spanish water agengy, Cadagua, for advice on life cycle assessment (LCA) and environmental impacts of Cadagua operated wastewater treatment plants. The project uses the LCA software GaBi and focuses on La Gavia Wastewater Treatment Plant in Madrid. This …
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Modeling, simulation and optimization of the activated sludge waste water treatment process
Digitized by Kansas Correctional Industries
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Development of Innovative Ultra-Filtration Fibre Technologies for Waste-Water Treatment in Membrane Bio-Reactors (MBR)
… (UF) membrane technologies for use in wastewater treatment facilities has culminated from a combination of improvements in plant operation and optimising feed water interactions. With global demands in water quality increasing, this has placed increased pressure on MBR factories to …
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Characterization of selected microbial species for bioflocculant producing potential and comparison with traditional flocculants in industrial waste water treatment
… colloids in both domestic and industrial wastewater treatments. The process is achieved with the help of various flocculants such as natural and synthetic inorganic or organic flocculants. Synthetic flocculants are conventionally used due to their high flocculating efficiency and …
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Numerical simulation of hydrothermal salt separation process and analysis and cost estimating of shipboard liquid waste disposal
Due to environmental regulations, waste water disposal for US Navy ships has become a requirement which impacts both operations and the US Navy's budget. In 2006, the cost for waste water disposal Navy-wide was 54 million dollars. There are many advanced waste water treatment technologies in the …
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A life cycle assessment into energy recovery from organic waste : a case study of the water treatment facility of SABMiller Newlands Brewery
… to assess the avoided environmental burdens of waste water treatment by additional on-site anaerobic waste water treatment prior to municipal treatment and disposal to river. It investigates the opportunity for further burden reduction by way of energy capture from generated biogas and …
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An economic approach to water supply planning in southeastern Virginia
… was conducted of alternative responses to the water supply situation in four cities in southeastern Virginia. Cost/benefit analyses were performed for the provision of projected levels of use and for reductions in those levels of use achieved with the use of quotas, price increases, and water …
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A Sustainable Bio-Solids Management For The Grand Forks Wastewater Treatment Plant
<p>The Grand Forks Waste Water Treatment Plant (GFWWTP) is currently sending its waste activated sludge (WAS) from the activated sludge treatment process to an existing on-site wastewater treatment lagoon which has been in operation since 2003. The plant produces approximately 65,000 gallons of WAS …
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Design and control of equalization tanks.
… operation of an equalization tank upstream of a waste water treatment plant which utilizes the available equalization hold-up volume in such a manner that it reduces, optimally, diurnal fluctuations in both influent flow and load rates. The influent to a wastewater treatment plant generally …
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A limnological survey of Lake Laura, Virginia
… mesotrophic based upon total phosphorus surface water, chlorophyll g, and secchi disc levels measured. Due to atypical meteorological conditions experienced during the study, the Vollenwieder model was utilized to evaluate the impact of various nutrient sources on Lake Laura under more typical …
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The effects of select non-steroidal anti-inflammatory drugs on green and brown hydra
… concentrations into aquatic ecosystems through waste water treatment plants (WWTPs). Non-steroidal anti-inflammatory drugs (NSAIDs) are important contaminants in water cycles. In this study, several NSAIDs were assessed for their potential toxicity to Hydra. Chronic toxicity was evaluated using …
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On the theory of Brownian aggregation in colloidal dispersions
… The destabilization of silt dispersions as river water mixes with the high-ionic-strength seawater near river system deltas leads to the deposition of fertile soil on the river banks. Pigments used in the stone age paintings found in the Lascaux caves of France and in the written records of …
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Thermal Analysis of Binding of Organic Pollutants to Titanium Dioxide
<p>Conventional waste water treatment processes are not completely effective in removing highly stable organic compounds. Photocatalytic degradation on titanium dioxide is a possible alternative technique for many classes of these compounds. Several studies have been done by other researchers to …
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EXPERIMENTAL AND MODELING STUDIES OF COLLOIDAL SUSPENSION STABILITY OF HIGH-DENSITY PARTICLES IN AQUEOUS SOLUTIONS
… of paints and coatings, enhanced oil recovery, waste-water treatment, pharmaceutical dispersions, biotechnology, and inkjet printing. The most common problem in colloidal science is how to stabilize suspended colloidal particles against agglomeration by controlling their interparticle forces. If …
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Processing of CdS/CdTe solar cell and the growth model of CdTe thin film
… application is its low production rate and waste water treatment. This dissertation reports how to produce different thickness large area (100cm2) CdS thin film by CBD. The influence of the solution temperature and concentration on the thickness of CdS is investigated. This dissertation also …
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An investigation into biological treatment of fruit cannery wastes
… proximity to both the farms and railheads. The wastewaters generated by the numerous canneries vary greatly in composition - being dependent upon the particular fruit or vegetable being processed. The wastes generally have high BOD or COD concentrations (mainly due to sugars and starches) and …
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Hydrothermal Processes Applied to Sludge Reduction
… systems have been widely implemented to treat wastewater. CAS systems produce huge amounts of waste sludge and its subsequent treatment represents up to 65 % of the operational costs of Waste Water Treatment Plants. The final disposal of sludge is usually performed by landfilling or …
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Can trade effluent charges promote compliance and address water security risks in Nairobi’s manufacturing industries?
… charges could promote compliance and address water security risks in manufacturing industries in Nairobi. This is due to the burden of effluent management that Nairobi City Water and Sewerage Company (NCWSC), the largest water supply and sewerage Company in Nairobi, has been having in the …
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