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 165 for “"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
… 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 material used …
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Design of an anaerobic digester in Quebec, Canada
… 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 for this …
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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
… fermentation processes in laboratory-scale digesters. The effect of influent solids concentration (4% and 6%) and retention time (15 days and 20 days) on seed viability was observed. The experiments were carried out in the mesophilic temperature range [35°C±1ºC]. Fall Panicum seeds were …
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The effect of various control actions on anaerobic digester performance.
… <br/><br/>Monitoring of conventional anaerobic digester systems typically consists of a combination of intermittent manual sampling followed by off-line analysis coupled with qualitative observations. Hence a decline in reactor performance could go unnoticed for a significant period of time. A …
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Barriers to Adoption of Methane Digester Technology on California Dairies
… to analyze the barriers to adoption of methane digesters on California dairies. Methane digesters have long existed as a technology in the dairy industry, both in the United States and abroad. Much research has been done to attest to the viability and economic sustainability of methane …
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Dynamic behavior and control of a continuous digester washing stage.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1973. M.S.
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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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Feasibility of an integrated biogas scrubber for a swine manure digester
… the biogas produced by a swine manure anaerobic digester. This innovative scrubbing system was included in the original design of an existing full-scale digester, but had never been tested. The principle of operation was that ammonia (NH$\sb3$) gas would be desorbed from the influent manure in an …
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Ammonia Recovery from Digester Centrate with Electrochemical Membrane Systems: Mechanism, Performance, and Application
… mg per liter in some wastewaters like anaerobic digester (AD) centrate. However, both Haber-Bosch process and conventional wastewater ammonia treatment process are energy intensive, which making direct ammonia recovery from wastewater streams become increasingly beneficial in order to achieve …
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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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Onpeak Market Dispatchable Energy From Megawatt Scale Fuel Cells And Stored Digester Methane
… on: • Computer executable simulations of biogas digester companies and an onpeak fuel cell dispatching Genco, working together to maximize biogas revenue on the electricity spot market; • A unique method of scheduling onpeak megawatt scale electricity to the wholesale power grid using purified …
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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
… gas stream produced from anaerobic digesters within WWTP. Methane, carbon dioxide and hydrogen sulfide were combined with humidity and gaseous siloxane in levels characteristically seen exiting anaerobic digesters. A methanol impinger train was utilized to sample the biogas …
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