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 85 for “"anaerobic digester"”.
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Chemical treatment of anaerobic digester supernatant
The recycle of anaerobic digester supernatant, a low volume, highly 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, …
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Heat transfer through anaerobic digester concrete tank walls
… of the heat transfer through concrete walls in anaerobic digester facilities. In the biogas industry, the term “heat loss” is synonymous with heat transfer. The dissertation identifies the reasons why heat is critical in the operations of these facilities. Concrete has traditionally been a …
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Design of an anaerobic digester in Quebec, Canada
… near Montreal is considering constructing an anaerobic digester. This thesis focuses on designing a scalable prototype based on the waste types available from the existing facilities of the company and the Montreal area. Based on an extended literature review and a feedstock analysis realized …
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Engineering analysis of a Chinese-type anaerobic digester
… to evaluate the performance of spherical Chinese digesters receiving dairy waste. Sixteen laboratory-scale (3L) reactors were operated in the mesophilic temperature range (35°C±2°C) and were subjected to hydraulic retention times (HRT) of 8, 10, 15, and 20 days and influent substrate …
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Weed seed survival in an agriculturally-based anaerobic digester
… was undertaken to determine the effects of anaerobic fermentation of raw manure on the viability of Johnsongrass and Fall Panicum seeds which may be present in the waste. Dairy waste containing Johnsongrass and Fall Panicum seeds were subjected to batch and continuously-fed anaerobic …
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The effect of various control actions on anaerobic digester performance.
… beet to manufacture edible sugar. A high rate anaerobic system followed by an activated sludge process to 'polish' the effluent is presently the best available technology not entailing excessive costs for the treatment of wastewater from sugar processing factories. Upflow anaerobic sludge …
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Simulation and optimization of a two stage continous anaerobic digester system
Call number: LD2668 .T4 1969 B36
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Simulation and optimization of a two stage continous anaerobic digester system
Call number: LD2668 .T4 1969 B36
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The effect of different sludge pretreatment methods on mitigation of anaerobic digester foaming
In this study, waste activated sludge obtained from two full-scale treatment plants with foaming issues was pretreated with acid/alkali treatment, acid-phase fermentation, thermal treatment, sonication, and metal salt treatment to investigate their effect on foam mitigation. The major foam forming …
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Methane Production by a Packed-Bed Anaerobic Digester Fed Dairy Barn Flush Water
<p>Packed-bed digesters are an alternative to covered lagoon digesters for methane production and anaerobic treatment of dilute wastewaters such as dairy barn flush water. The physical media of packed-beds retain biofilms, often allowing increased treatment rates. Previous studies have evaluated …
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Method Development for the Synthesis of Anaerobic Digester Biogas with the Laboratory Environment
… easily generated and common byproduct of anaerobic digestion at wastewater treatment plants (WWTP), landfills and agricultural operations. There is growing interest in researching and utilizing the energy potential associated with its combustion. Siloxanes, a family of volatile organic …
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Enhancing hydraulic performance of a multi-stage anaerobic digester for high solids cattle manure
Anaerobic digestion is an attractive technology for waste handling because it converts low value waste material into energy and other useful products while performing necessary treatment for proper waste disposal. Conventional anaerobic digestion technology, however, has been met with many economic …
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BIOWINTM Modeling of the Startup of an Anaerobic Digester Used in Wastewater Treatment Plants
Anaerobic digestion involves biochemical and physiochemical processes. It is an effective process for sludge stabilization and methane gas production. However, the digester capacity decreases with time due to the buildup of solid deposits at the bottom of the digester. Therefore, routine shutdown …
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Anaerobic Digester Liquor as a Source of Ammonium and Phosphate For Single-Cell Protein Production
… in the literature that some yeasts will grow in anaerobic digester liquor with an external source of carbohydrate for energy. In this research tests were performed to determine the optimum conditions for growth of the yeasts Candida utilis and Kluyveromyces fragilis. It was found that a pH of 4.0 …
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The effects of a phosphate detergent ban on a biological nutrient removal plant and anaerobic digester
… respectively. Measurements and modelling of the anaerobic digester contents indicated that several minor changes had occurred in the digester which may be attributable to the phosphorus ban, but the equilibria of the digester regarding phosphorus compounds had not been dramatically altered. This …
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Evaluating Biological Treatment Systems: (i) Moving Bed Biofilm Reactor versus Biological Aerated Filtration, and (ii) Sulfide-Induced corrosion in Anaerobic Digester Gas Piping
… II involved study on causes of deposition in anaerobic digester gas piping. The first section evaluated and compared the performance of a laboratory-scale MBBR and BAF for organic carbon and suspended solids removal. A kinetic study was also performed on the MBBR to evaluate the system …
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An investigation into increased productivity of small scale anaerobic digesters by means of temperature management
… 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 the digesters in order to increase process …
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Performance and metagenomic microbial analysis of a novel, pilot-scale reactor with rotating algal contactors used to treat anaerobic digester sludge filtrate containing high total ammonia
… for the treatment of high-strength municipal anaerobic digester filtrate. Each reactor in the pilot-scale system comprises multiple AlgaewheelTM rotating algal contactors (RACs) that help efficiently oxygenate the anaerobic digester filtrate being treated in a shallow tank. Total ammonia …
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Removal of Estrogens at Full and Pilot Scale Livestock Manure Treatment Systems
… of E3 in flushed dairy manure and 118% of E2 in anaerobic digester effluent were recovered with ELISA. 67% and 140% of E2 in flushed manure and anaerobic digester effluent, respectively, were recovered with YES assay. In Experiment II, samples were collected from a full-scale manure handling …
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