Effect of ferrous iron on the settling properties of granular sludge in a UASB reactor

Vlyssides, A; Barampouti, EM; Mai, S; Moutsatsou, A

dc.contributor.author	Vlyssides, A	en
dc.contributor.author	Barampouti, EM	en
dc.contributor.author	Mai, S	en
dc.contributor.author	Moutsatsou, A	en
dc.date.accessioned	2014-03-01T02:50:21Z
dc.date.available	2014-03-01T02:50:21Z
dc.date.issued	2006	en
dc.identifier.issn	17433541	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/35077
dc.subject	Ferrous iron	en
dc.subject	Granulation	en
dc.subject	Settling properties	en
dc.subject	UASB	en
dc.subject.other	bioreactor	en
dc.subject.other	conference proceeding	en
dc.subject.other	granulite	en
dc.subject.other	iron	en
dc.subject.other	settling behavior	en
dc.subject.other	sludge	en
dc.subject.other	water treatment	en
dc.title	Effect of ferrous iron on the settling properties of granular sludge in a UASB reactor	en
heal.type	conferenceItem	en
heal.identifier.primary	10.2495/WM060181	en
heal.identifier.secondary	http://dx.doi.org/10.2495/WM060181	en
heal.publicationDate	2006	en
heal.abstract	The effect of ferrous ion addition on the settling properties of the granules in an upflow anaerobic sludge blanket (UASB) reactor was investigated. A UASB reactor (35°C; pH=7) was operated for 3 months at a 20-h hydraulic retention time (HRT) at organic load from 2,0 to 20,0 gCOD.L-1.d-1 Ferrous iron as FeSO4.7H2O was fed to the reactor in a range of load from 0,03 to 0,28 g Fe+2L-1.d-1. After steady state conditions were achieved, the settling properties of granular sludge from the anaerobic sludge bed reactor were determined by using a novel upflow velocity test. From the results, it was concluded that iron promoted granulation. The U10% (10% of sludge washed out by applying upflow velocity U10%) was increased from 0,23 m.h-1 to 13,21 m.h-1, while U30% from 0,87 m.h-1 to 29,11 m.h-1 and U60% from 6,63 m.h-1 to 49,82 m.h-1.	en
heal.journalName	WIT Transactions on Ecology and the Environment	en
dc.identifier.doi	10.2495/WM060181	en
dc.identifier.volume	92	en
dc.identifier.spage	161	en
dc.identifier.epage	169	en