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 367 for “"activated sludge"”.
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Aerobic digestion of waste activated sludge from biological nutrient removal activated sludge systems
Waste activated sludge (WAS) is a biological sludge that contains biodegradable and non-biodegradable volatile suspended solids (VSS) and non-volatile inorgainic suspended solids (ISS). Stabilization for safe disposal of the WAS is a process of paramount importance at wastewater treatment plants …
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The contact stabilization activated sludge process
… and Marais put forward a general model for the activated sludge process based on an energy requirement for adsorption of the nutrient onto the organisms. They briefly outlined an alternative bi-substrate hypothesis in which the energy requirement for adsorption fell away. No evidence in support …
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Kinetics of the activated sludge process
… the more important papers on the kinetics of the activated sludge process. These papers chronologically trace developments in the kinetic theory, from aerobic steady state behaviour to aerobic, nitrification and denitrification behaviour under cyclic flow and load conditions in multi-reactor …
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Cations and activated sludge floc structure
… designed to investigate the effect of cations on activated sludge characteristics and also to determine their influence on digestion performance. For this purpose, cations in solution and in floc were evaluated along with various activated sludge characteristics and the collected waste activated …
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Acclimation of activated sludge to pentachlorophenol
Bench scale activated sludge reactors were acclimated to dextrose and then to low levels of pentachlorophenol. The metabolic activity of activated sludge was evaluated by its specific rate of dextrose uptake, Δs/Δt/X (measured by COD removal). Depression of the specific uptake rate, resulting from …
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Processing and disposal of waste activated sludge
Typescript, etc.
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Processing and disposal of waste activated sludge
Typescript, etc.
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Detection of filamentous bacteria in activated sludge
… bacteria responsible for bulking at Goudkoppies activated sludge plant in Johannesburg, South Africa, in order to allow fluorescent antibody against these microorganisms to be produced and to facilitate and simplify their identification. Of the filaments only Nocardia could be isolated using …
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Flocculation and Clarification in Activated Sludge Systems
Made available in DSpace on 2014-12-08T23:56:43Z (GMT). No. of bitstreams: 1 6612407.pdf: 5135179 bytes, checksum: 7baa621e857e38bc86c867c88f6c0f5c (MD5) Previous issue date: 1966
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Uptake of Soluble Phosphate by Activated Sludge
Made available in DSpace on 2014-12-08T23:57:02Z (GMT). No. of bitstreams: 1 6812128.pdf: 3517638 bytes, checksum: daebc3bb811f3f9ddd0abe5e1a41b05d (MD5) Previous issue date: 1968
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Sensitivity Analysis of the UNO Activated Sludge Model
… models have been proposed to predict the activated sludge process final effluent quality. La Motta (2004b) developed a mathematical model linking the operating parameters of an activated sludge system and the classical limiting flux sludge settling theory. This project studies the …
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Nitrification and denitrification in the activated sludge process
The characteristics of the single-sludge nitrification-denitrification process were investigated using influent organics as the carbon source and nitrate as an electron acceptor to see if any oxygen savings could be obtained. The key research tools used were mathematical modeling, computer …
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Biological excess phosphorus removal in activated sludge systems
When this investigation was commenced in 1983 two activated sludge systems had been developed in South Africa that accomplish biological excess phosphorus (P) removal, the UCT and modified Bardenpho systems. To predict the P removal in these systems, an empirical model had been developed. In the …
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Phosphorus removal in the modified activated sludge process
… contributes to excess removal of phosphorus in activated sludge systems, i.e. removal in excess of the basic biological requirement for metabolic purposes. This objective was pursued by imposing conditions in which one or the other of the two mechanisms had negligible influence. From the series …
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Activated sludge metabolism of certain quaternary carbon compounds
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil and Sanitary Engineering, 1959.
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Comparative phosphorus removals using modified activated sludge processes
… of three continuous flow units as modified activated sludge models using mean cell residence time as a principal operational parameter has led to the following conclusions: 1. Lower mean cell residence times result in higher phosphorus removal efficiencies in biological reactors. 2. Higher …
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