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dc.contributor.authorStevens, Karen B.en
dc.date.accessioned2014-03-14T21:27:47Zen
dc.date.available2014-03-14T21:27:47Zen
dc.date.issued1993en
dc.identifier.otheretd-01242009-063441en
dc.identifier.urihttp://hdl.handle.net/10919/40764en
dc.description.abstractThe microbial populations in the Hoechst-Celanese activated sludge were examined. Heterotrophs, denitrifiers, sulfate-reducers, protozoa and filamentous bacteria were enumerated. Variations in microbial populations were compared with influent and effluent constituent concentrations, and with aeration basin characteristics, such as dissolved oxygen and F/M ratio, to determine whether any microbial type could be used by plant operators to monitor process performance. Results indicated that filamentous bacteria may be useful to plant operators for monitoring process performance because an inverse relationship between filamentous bacteria, food-to-microorganism ratio and sludge volume index was suggested by this study. Protozoa may also be useful for operators, although more data is needed. Microthrix parvicella and Type 0041 were the most common filament types. Filament Type 1701 was most prevalent during a period of low dissolved oxygen. A strong relationship between stalked ciliates and effluent quality was mention in the literature, but was not found in this study. Enumeration methods were evaluated.en
dc.format.extentiv, 136 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.isformatofOCLC# 29374227en
dc.relation.haspartLD5655.V855_1993.S743.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1993.S743en
dc.subject.lcshSewage -- Microbiologyen
dc.subject.lcshSewage -- Purification -- Activated sludge processen
dc.titleInvestigation of the microbial populations in the activated sludge of the Hoechst-Celanese wastewater treatment planten
dc.typeThesisen
dc.contributor.departmentEnvironmental Engineeringen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineEnvironmental Planningen
dc.type.dcmitypeTexten
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01242009-063441/en
dc.date.sdate2009-01-24en
dc.date.rdate2009-01-24en
dc.date.adate2009-01-24en


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