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 181 for “"waste water"”.
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Algal sludge disposal in waste-water reclamation
… by criteria commonly used in the design of water treatment facilities, was operated to determine whether or not it could effectively remove algae and other suspended matter from raw sewage stabilization lagoon effluent. Algal sludge produced by the treatment facility was investigated: (1) to …
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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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Numerical Simulation of an Open Channel Ultraviolet Waste-water Disinfection Reactor
… of an open channel ultra-violet (UV) wastewater disinfection reactor are investigated using a computational fluid dynamics (CFD) model. The model is based on the volume of fluid method to capture the water-air interface, the Lagrangian particle tracking method to determine the …
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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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Engineering aspects of calcium carbonate and magnesium hydroxide precipitation in waste water reclamation
… major problems associated with lime treatment in waste water reclamation. The contribution to knowledge is briefly outlined below. One of the major problems associated with lime treatment is the instability of lime-treated effluent, which may result in serious calcium carbonate scale formation …
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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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A study on the removal of common analgesics from waste water, using zeolites Clinoptilolite and Beta
… with the products of metabolisation, they enter wastewaters as biologically active substances. Pharmaceuticals form a large group of compounds that are often polar molecules, therefore, are usually soluble in water. Thus, many PACS cannot be completely removed from wastewaters; hence, are found …
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Feasibility study on the removal and recovery of ionic mercury from waste water using tannery hair
… design study was completed for treating a waste stream with 100 ppm mercury. The process lowers the mercury concentration to one ppb before discharge and the hair is regenerated for further use. The NaCl-HgCl₂ liquor is treated with NaOH to precipitate mercury as HgO at a pH of 10.5 - 12.0. …
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Design and application of a bench scale evaporator for the treatment of coal power plant waste water
… The evaporation observed translates to 34.5% water recovery. Speciation using PHREEQ-C modelling software showed that the concentrations of scale forming ions increased during evaporation. Scale prediction and prevention were explored using French Creek software, with anti-scaling agents being …
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Antimicrobial mechanism of action of ultrasound technology : a macroscopic, genetic and transcriptomic perspective for the disinfection of (waste)water
… and its further use on the disinfection of wastewater. The specific objectives of the proposed research project are the following: Perform quantitative assessments to fully describe the microbial inactivation and recovery dynamics of selected faecal indicators during ultrasound processing …
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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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Capillary electrophoresis of pteridines in urine and plants and quantification of pharmaceutical and personal care products in Missouri waste water
… and personal care products (PPCP's) in Missouri waste water.</p> <p>As cancer continues to be one of the top three causes of human fatalities, early cancer screening research continues to gain momentum. One specific category of compounds known as pteridines is a class of compounds with potential …
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A study of the current best practice in the Scottish electroplating industry and improved metal recovery technique for waste water streams.
… a major source of toxic effluents and hazardous wastes. Though waste treatment will greatly reduce the quantities of pollutants reaching the immediate environment, it should be realised that such treatment has its limitations. The end-of-pipe treatment systems will only help to transfer waste …
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A study of the effect of Si:Al Ratio and ion-exchange on the ability of the zeolite ZSM-5 to adsorb common analgesics from waste water
… inadequate removal methods, pharmaceutical waste has been increasing in concentration in environmental waters. It is unknown what the chronic effects this waste could have on humans and so more adequate removal methods are necessary. In this research project the zeolite ZSM-5’s effectiveness …
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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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An investigation into increased productivity of small scale anaerobic digesters by means of temperature management
The use of biological waste as a primary energy source for the production of biogas, by the process of anaerobic digestion, has been commonly used in the past by small communities and on a larger scale by waste water treatment plants. In the latter, the biogas is traditionally used for heating of …
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Effects of Wastewater Discharge on Fresh Water Quality in Dar es Salaam: A Case of Msimbazi River
… aim of the study was to determine the effect of waste water discharge on the fresh water quality for Msimbazi river in Dar es Salaam Tanzania. This river has heavily polluted due to effluents from domestic usage, industries and other human activities. The problems associated with discharging …
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Pelletization in the upflow anaerobic sludge bed (UASB) reactor
… the feasibility of treating an apple juicing waste water in an upflow anaerobic sludge bed (UASB) reactor system. Past experience with this system suggested that a pelletized sludge would be produced due to the nature of the waste water. This indeed was observed but the system exhibited an …
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