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dc.contributor.advisorHu, Zhiqiang, 1966-eng
dc.contributor.authorChen, Qian, 1985-eng
dc.date.issued2010eng
dc.date.submitted2010 Summereng
dc.descriptionTitle from PDF of title page (University of Missouri--Columbia, viewed on Aug. 24, 2010).eng
dc.descriptionThe entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file.eng
dc.descriptionThesis advisor: Dr. Zhiqiang Hu.eng
dc.descriptionM.S. University of Missouri--Columbia 2010.eng
dc.description.abstractAnaerobic digestion involves multiple bacterial and archaea species to convert organic matter into volatile fatty acids and finally into methane and carbon dioxide. In this study, the effect of six selected C1 to C4 organic acids on biogas production and microbial growth in anaerobic digestion was evaluated using batch assays. These C1 to C4 compounds included formic acid, acetic acid, propionic acid, lactic acid, pyruvic acid and butyric acid. Each organic acid was tested as a sole substrate in individual batch experiment at different concentrations range from 250 mg COD/L to 8000 mg COD. The cumulative biogas volume was recorded automatically by a respirometer every ten min. The biogas generation rate was calculated from the cumulative biogas generation curve while the specific microbial growth rate was estimated using Monod and Andrews equations based on the coupled stoichiometric reactions between biogas production and microbial growth. The tested organic acids were divided into two groups based on substrate self-inhibitory characteristics in anaerobic digestion. Anaerobic digestion of acetic acid and propionic acid presented self-inhibition at high acid concentrations while formic acid, lactic acid, pyruvic acid and butyric acid did not inhibit anaerobic digestion at the highest concentrations tested. The microbial growth rates using butyric acid, pyruvic acid and acetic acid were 0.170, 0.167, and 0.396 d-1, respectively. For comparison, the growth using propionic acid, lactic acid and formic acid was relatively slower with the growth rates of 0.136, 0.133 and 0.133 d-1, respectively.eng
dc.description.bibrefIncludes bibliographical referenceseng
dc.format.extentix, 62 pageseng
dc.identifier.merlinb80703501eng
dc.identifier.oclc680674314eng
dc.identifier.urihttp://hdl.handle.net/10355/9296
dc.identifier.urihttps://doi.org/10.32469/10355/9296eng
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. Graduate School. Theses and Dissertations. Theses. 2010 Theseseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
dc.subject.lcshSewage -- Purification -- Anaerobic treatmenteng
dc.subject.lcshOrganic acidseng
dc.subject.lcshChemical kineticseng
dc.titleKinetics of anaerobic digestion of selected C1 to C4 organic acidseng
dc.typeThesiseng
thesis.degree.disciplineCivil and environmental engineering (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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