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

Stasinakis, AS; Mamais, D; Paraskevas, PA; Lekkas, TD

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	https://dspace.lib.ntua.gr/xmlui/handle/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.publisher	WATER ENVIRONMENT FEDERATION	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