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dc.contributor.authorInman, David C.en_US
dc.date.accessioned2014-03-14T20:47:22Z
dc.date.available2014-03-14T20:47:22Z
dc.date.issued2004-10-14en_US
dc.identifier.otheretd-11022004-223730en_US
dc.identifier.urihttp://hdl.handle.net/10919/35573
dc.description.abstractWashington D.C. Water and Sewage Authority is planning to construct a new anaerobic digestion facility at its Blue Plains WWTP by 2008. The research conducted in this study is to aid the designers of this facility by evaluating alternative digestion technologies. Alternative anaerobic digestion technologies include thermophilic, acid/gas phased, and temperature phased digestion. In order to evaluate the relative merits of each, a year long study evaluated the performance of bench scale digestion systems at varying solids retention times (SRT) and organic loading rates (OLR). The digesters were fed a blend of primary and secondary residuals from the Blue Plains wastewater treatment facility. In each study phase, temperature phased anaerobic digestion was compared to single stage mesophilic digestion (the industry standard) at the same SRT. Single stage thermophilic digestion was evaluated by sampling the first thermophilic stage of the temperature phased digestion systems throughout the study. Additionally, the first phase study compared acid/gas phased digestion to temperature phased and single stage mesophilic digestion. Results of the study demonstrated that the temperature phased digestion system consistently performed better than the other systems during each study phase by having higher volatile solids reduction (VSR), higher methane production, and lower residual biological activity. The highest observed VSR during the study (67%) occurred in a temperature phased digestion system operated at 7.5 days in each stage. Based on these results, it seems a suitable candidate for the Blue Plains digestion facility. Additionally, odor studies performed in conjunction with the research presented in this paper have shown distinct advantages for the temperature phased process.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartInman_2004_etd.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectthermophilicen_US
dc.subjecttemperature phaseden_US
dc.subjectmesophilicen_US
dc.subjectbiosolidsen_US
dc.subjectdigestionen_US
dc.subjectanaerobicen_US
dc.titleComparative Studies of Alternative Anaerobic Digestion Technologiesen_US
dc.typeThesisen_US
dc.contributor.departmentEnvironmental Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineEnvironmental Planningen_US
dc.contributor.committeechairNovak, John T.en_US
dc.contributor.committeememberRandall, Clifford W.en_US
dc.contributor.committeememberBoardman, Gregory D.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11022004-223730/en_US
dc.date.sdate2004-11-02en_US
dc.date.rdate2006-11-12
dc.date.adate2004-11-12en_US


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