Evaluation of different methods for the determination of maximum heterotrophic growth rates

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dc.contributor.author Stasinakis, AS en
dc.contributor.author Mamais, D en
dc.contributor.author Paraskevas, PA en
dc.contributor.author Lekkas, TD en
dc.date.accessioned 2014-03-01T01:18:57Z
dc.date.available 2014-03-01T01:18:57Z
dc.date.issued 2003 en
dc.identifier.issn 1061-4303 en
dc.identifier.uri http://hdl.handle.net/123456789/15284
dc.subject Activated sludge en
dc.subject Bacterial kinetics determination en
dc.subject Batch methods en
dc.subject Biomass growth en
dc.subject Substrate-to-biomass ratio en
dc.subject.classification Engineering, Environmental en
dc.subject.classification Environmental Sciences en
dc.subject.classification Limnology en
dc.subject.classification Water Resources en
dc.subject.other Batch reactors en
dc.subject.other Growth rates en
dc.subject.other Oxygen consumption en
dc.subject.other Substrate-to-biomass ratios en
dc.subject.other Bacteria en
dc.subject.other Biomass en
dc.subject.other Growth (materials) en
dc.subject.other Oxidation en
dc.subject.other Substrates en
dc.subject.other Chemical reactors en
dc.subject.other activated sludge en
dc.subject.other batch separation en
dc.subject.other biological treatment en
dc.subject.other microorganism en
dc.subject.other wastewater treatment en
dc.subject.other activated sludge en
dc.subject.other article en
dc.subject.other bacterial growth en
dc.subject.other bacterial kinetics en
dc.subject.other batch reactor en
dc.subject.other biomass support en
dc.subject.other biosynthesis en
dc.subject.other catabolism en
dc.subject.other growth rate en
dc.subject.other heterotrophy en
dc.subject.other mathematical analysis en
dc.subject.other oxygen consumption en
dc.subject.other priority journal en
dc.subject.other suspended particulate matter en
dc.subject.other volatilization en
dc.subject.other Bacteria (microorganisms) en
dc.title Evaluation of different methods for the determination of maximum heterotrophic growth rates en
heal.type journalArticle en
heal.identifier.primary 10.2175/106143003X141349 en
heal.identifier.secondary http://dx.doi.org/10.2175/106143003X141349 en
heal.language English en
heal.publicationDate 2003 en
heal.abstract This work evaluated the most commonly used methods for determining maximum heterotrophic specific growth rates (mu(m)) in batch reactors. Parallel batch experiments were conducted under various initial substrate-to-biomass (S-o/X-o) ratios and values of the solids retention time (theta(c)). The maximum specific growth rate, mu(m) was determined simultaneously according to measurements of oxygen consumption (i.e., oxygen uptake rate, OUR) and volatile suspended solids (VSS) increase. The S-o/X-o ratio was found to significantly influence mu(m) values. Under high S-o/X-o ratios (= 20), fast-growing bacteria seemed to gain a competitive advantage resulting in higher mu(m) values than those obtained under low S-o/X-o ratios (= 1.5). The OUR-based estimate of mu(m) (mum((OUR))), under certain, circumstances, is differentiated from p. that is based on exponential bacterial growth (mu(m(vss))), and seems to be more a measure of substrate oxidation than a measure of bacterial growth. At high S-o/X-o ratio and low theta(c), mu(m(OUR)) was significantly higher than the mu(m(vss)), indicating that considerable uncoupling between anabolism and catabolism was occurring under these conditions. Batch experiments conducted at high S-o/X-o ratios seemed to be a more sensitive method for determining mu(m) values in the presence of an inhibitor than tests conducted at low S-o/X-o ratios. en
heal.journalName Water Environment Research en
dc.identifier.doi 10.2175/106143003X141349 en
dc.identifier.isi ISI:000220160000008 en
dc.identifier.volume 75 en
dc.identifier.issue 6 en
dc.identifier.spage 549 en
dc.identifier.epage 552 en

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