Investigating the mechanism of sludge reduction in activated sludge with an anaerobic side-stream reactor

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dc.contributor.authorD H Chon-
dc.contributor.authorM Rome-
dc.contributor.authorHee-Sik Kim-
dc.contributor.authorC Park-
dc.date.accessioned2017-04-19T09:21:43Z-
dc.date.available2017-04-19T09:21:43Z-
dc.date.issued2011-
dc.identifier.issn02731223-
dc.identifier.uri10.2166/wst.2011.015ko
dc.identifier.urihttps://oak.kribb.re.kr/handle/201005/9993-
dc.description.abstractTo investigate the mechanism of sludge reduction in activated sludge (AS) with an anaerobic side-stream reactor (ASSR), four AS systems with different digestion schemes were operated in the laboratory. The four systems are: a) AS+ASSR; b) AS+aerobic digester; c) AS+anaerobic digester; and d) AS with no solids wastage. The average sludge yield of AS+ASSR from two phases was 0.14 mgVSS/mgCOD, which is 22-54% less than that from the three other systems. The accounting of biomass in AS+ASSR system revealed that 50% of sludge is degraded in ASSR while the other half is degraded in the aeration basin. Furthermore, both whole sludge and centrate from ASSR led to a significant oxygen uptake in AS, indicating the importance of aerobic biodegradation in AS+ASSR system. The extracellular polymeric substances (EPS) data showed that base-extractable EPS was much smaller for AS with ASSR than with no wastage. In contrast, cation exchange resin-EPS was similar for both systems. These results indicate that degradation of base-extractable EPS accounts for the lower sludge yield in AS+ASSR, and based on the literature this organic pool is believed to be aluminium and/or iron-bound EPS. The microbial profile data suggests that recirculation in AS+ASSR selects some unique microorganisms. Further research is warranted to study their role in sludge reduction.-
dc.publisherIwa Publishing-
dc.titleInvestigating the mechanism of sludge reduction in activated sludge with an anaerobic side-stream reactor-
dc.title.alternativeInvestigating the mechanism of sludge reduction in activated sludge with an anaerobic side-stream reactor-
dc.typeArticle-
dc.citation.titleWater Science and Technology-
dc.citation.number1-
dc.citation.endPage99-
dc.citation.startPage93-
dc.citation.volume63-
dc.contributor.affiliatedAuthorHee-Sik Kim-
dc.contributor.alternativeName전동현-
dc.contributor.alternativeNameRome-
dc.contributor.alternativeName김희식-
dc.contributor.alternativeName박철-
dc.identifier.bibliographicCitationWater Science and Technology, vol. 63, no. 1, pp. 93-99-
dc.identifier.doi10.2166/wst.2011.015-
dc.subject.keywordActivated sludge-
dc.subject.keywordDigestion-
dc.subject.keywordEPS-
dc.subject.keywordSide-stream reactor-
dc.subject.keywordSludge reduction-
dc.subject.keywordYield-
dc.subject.localActivated sludge-
dc.subject.localDigestion-
dc.subject.localEPS-
dc.subject.localSide-stream reactor-
dc.subject.localSludge reduction-
dc.subject.localYield-
dc.description.journalClassY-
Appears in Collections:
Division of Biomaterials Research > Cell Factory Research Center > 1. Journal Articles
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