Influence of ferrous iron on the granularity of a UASB reactor

Vlyssides, A; Barampouti, EM; Mai, S

dc.contributor.author	Vlyssides, A	en
dc.contributor.author	Barampouti, EM	en
dc.contributor.author	Mai, S	en
dc.date.accessioned	2014-03-01T01:30:55Z
dc.date.available	2014-03-01T01:30:55Z
dc.date.issued	2009	en
dc.identifier.issn	1385-8947	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19675
dc.subject	Ferrous iron	en
dc.subject	Granulation	en
dc.subject	Granule diameter	en
dc.subject	Settling properties	en
dc.subject	UASB	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Chemical oxygen demand	en
dc.subject.other	Granulation	en
dc.subject.other	Iron compounds	en
dc.subject.other	A stables	en
dc.subject.other	Bed porosities	en
dc.subject.other	Conversion rates	en
dc.subject.other	Ferrous ions	en
dc.subject.other	Ferrous iron	en
dc.subject.other	Ferrous irons	en
dc.subject.other	Granular sludges	en
dc.subject.other	Granule diameter	en
dc.subject.other	Hydraulic retention times	en
dc.subject.other	Organic loads	en
dc.subject.other	Settling properties	en
dc.subject.other	Settling velocities	en
dc.subject.other	UASB	en
dc.subject.other	Uasb reactors	en
dc.subject.other	Upflow anaerobic sludge blanket reactors	en
dc.subject.other	Iron	en
dc.title	Influence of ferrous iron on the granularity of a UASB reactor	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cej.2008.05.011	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cej.2008.05.011	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The effect of ferrous ion addition on the granularity of an upflow anaerobic sludge blanket (UASB) reactor was investigated. Two UASB reactors (R1 and R2) (35 degrees C; pH 7) were operated for 3 months at a 20-h hydraulic retention time (HRT)at organic loads from 1.4 to 10.0 g COD L-1 d(-1). Ferrous iron was fed only to reactor R1 in a range of load from 0.014 to 0.100 g Fe2+ L-1 d(-1). The addition of ferrous iron induced a stable and excellent COD conversion rate. The enhancement of the performance of reactor R1 may be accredited to the mean granule diameter increase as well as to the Sludge bed porosity decrease. The addition of iron to reactor R1 had a pronounced effect on the quality of the granular sludge, increasing the characteristic settling velocities. The formation of ferrous sulphide was mainly responsible for the promotion of sludge granulation. (c) 2008 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Chemical Engineering Journal	en
dc.identifier.doi	10.1016/j.cej.2008.05.011	en
dc.identifier.isi	ISI:000262884900009	en
dc.identifier.volume	146	en
dc.identifier.issue	1	en
dc.identifier.spage	49	en
dc.identifier.epage	56	en