Long chain fatty acids removal in selector tanks: Evidence for insufficient Microthrix parvicella control

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dc.contributor.author Noutsopoulos, C en
dc.contributor.author Mamais, D en
dc.contributor.author Andreadakis, A en
dc.date.accessioned 2014-03-01T01:33:42Z
dc.date.available 2014-03-01T01:33:42Z
dc.date.issued 2010 en
dc.identifier.issn 1944-3994 en
dc.identifier.uri http://hdl.handle.net/123456789/20548
dc.subject Biosorption en
dc.subject Bulking en
dc.subject Filaments en
dc.subject Floc loading en
dc.subject Foaming en
dc.subject Long chain fatty acids en
dc.subject Microthrix parvicella en
dc.subject Selector tanks en
dc.subject.other Candidatus Microthrix en
dc.subject.other Candidatus Microthrix parvicella en
dc.title Long chain fatty acids removal in selector tanks: Evidence for insufficient Microthrix parvicella control en
heal.type journalArticle en
heal.identifier.primary 10/5004/dwt.2010.1410 en
heal.identifier.secondary http://dx.doi.org/10/5004/dwt.2010.1410 en
heal.language English en
heal.publicationDate 2010 en
heal.abstract Microthrix parvicella is the dominant filamentous microorganism prevailed in biological nutrient removal (BNR) activated sludge systems experiencing temporarily or even permanently filamentous bulking and foaming problems. Reports regarding the ability of M. parvicella to uptake and utilize long chain fatty acids (LCFA) are rather controversial. In the context of this study a series of carbon uptake batch experiments with oleate as the external substrate under aerobic, anoxic and anaerobic conditions were performed in order to investigate the biosorption capacity of activated sludge samples experiencing serious filamentous bulking and foaming problems due to M. parvicella proliferation. According to the results LCFA removal efficiency is reversely proportional to the applied organic loading. Removal efficiencies in the order of 70-90% were observed under aerobic conditions for floc loadings lower than 100 mgCOD/gSS, whereas lower removal efficiencies were experienced (30-40%) for significantly higher fl oc loadings. Similar correlation of removal efficiencies with floc loading was evidenced under anaerobic and anoxic conditions (50% LCFA removal for floc loadings lower than 100 mgCOD/gSS). Based on these findings it can be stated that under the conditions prevailing in anaerobic, anoxic and aerobic selector tanks, only a portion of LCFA is removed, and therefore the remaining LCFA under the completely mixed conditions prevailing at the aeration zone of a bioreactor would establish low enough floc loadings, thus stimulating M. parvicella growth. © 2010 Desalination Publications. All rights reserved. en
heal.publisher DESALINATION PUBL en
heal.journalName Desalination and Water Treatment en
dc.identifier.doi 10/5004/dwt.2010.1410 en
dc.identifier.isi ISI:000285631000004 en
dc.identifier.volume 23 en
dc.identifier.issue 1-3 en
dc.identifier.spage 20 en
dc.identifier.epage 25 en

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