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 851 for “"Sludge"”.
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The effect of sludge age on activated sludge sewage treatment
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Civil and Sanitary Engineering, 1949.
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Biological excess phosphorus removal in short sludge age activated sludge systems
… at laboratory-scale, the behaviour of short sludge age biological excess P removal systems, to assess the response of the systems under non-nitrifying and nitrifying conditions, to determine the optimal system configuration(s) and operational parameters, and to check the settling …
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Kinetics of biological nitrogen removal in a single sludge activated sludge process
… nitrification and denitrification in the single sludge nitrification-denitrification activated sludge process.
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The Effect of Sludge Characteristics Upon The Flotation of Bulked Activated Sludge
Made available in DSpace on 2014-12-10T22:21:33Z (GMT). No. of bitstreams: 1 7115003.pdf: 5172958 bytes, checksum: 520fdee79cdd88b5e3b6f8d773c55d64 (MD5) Previous issue date: 1970
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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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Effects Of Environmental Factors On Anaerobic Granular Sludge In Upflow Anaerobic Sludge Blanket Reactors
… rate anaerobic digestion and anaerobic granular sludge were studied in laboratory-scale (20 litres) and bench-scale (1.2 litres) upflow anaerobic sludge blanket (UASB) reactors.;The anaerobic bacteria, when grown in feed lacking iron and cobalt, could become iron and/or cobalt deficient and had …
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Relationship between the Sludge Settling Characteristics and the Parameters of the Activated Sludge System
The activated sludge process is one of the most commonly employed domestic and industrial waste treatment process. Different types of mathematical models have been proposed for design and operation of this process, most of which do not consider the relationship between the sludge settling …
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Sludge management in Alfenas, Brazil
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2002.
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Exocellular Polymeric Substances, Bioflocculation and Sludge Settling Properties in a Combined Anaerobic/Activated Sludge Process
… of organic, nutrient substances and reduction of sludge produced. Previous studies developed at the Marrero Wastewater pilot plant (fully aerobic system) revealed that the minimum solids contact chamber hydraulic residence (HRT) time in which bioflocculation occurs satisfactorily (effluent SS …
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Impact of polymer type, dosage, and mixing regime and sludge type on sludge floc properties
This research investigated the impact of sludge type, polymer type (percent mole charge), dosage, mixing rate, and solution ionic strength on bound water content of sludge flocs. Data determined to evaluate the extent of dewatering included: percent dry solids, bulk density, bound water content …
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Hydrothermal Processes Applied to Sludge Reduction
Conventional Activated Sludge (CAS) 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 …
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Soil stabilization utilising wastepaper sludge ash
… Such materials including Wastepaper Sludge Ash (WSA), can be used to modify certain engineering properties of soils for specific uses to conserve non-renewable natural resources.<br/><br/>In lime-stabilization of sulfate-bearing clay soils, there has been increasing concern over the …
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The contact stabilization activated sludge process
… 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 of this …
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Kinetics of the activated sludge process
… 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 systems …
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Wastewater sludge management options for Honduras
Sludge management is a fundamental area of concern across wastewater treatment systems in Honduras. The lack of timely sludge removal has led to declining plant performance in many facilities throughout the country. In addition to maintaining treatment efficiency, proper sludge management is …
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Cations and activated sludge floc structure
… 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 sludge …
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Polyelectrolyte conditioning of ferric sulfate sludge
Tests were run on samples of ferric sulfate sludge collected from the sedimentation basins of a water treatment plant during basin cleaning operations. The purpose of the testing was to determine if cationic, anionic and nonionic polyelectrolytes could successfully condition the sludge to improve …
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