Simple estimation of granule size distribution and sludge bed porosity in a UASB reactor

Vlyssides, AG; Barampouti, EMP; Mai, ST

dc.contributor.author	Vlyssides, AG	en
dc.contributor.author	Barampouti, EMP	en
dc.contributor.author	Mai, ST	en
dc.date.accessioned	2014-03-01T01:29:10Z
dc.date.available	2014-03-01T01:29:10Z
dc.date.issued	2008	en
dc.identifier.issn	1790-7632	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19148
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-77953344447&partnerID=40&md5=952f1258e3c12aae1a5e54c9c1eed9e5	en
dc.subject	Granule density	en
dc.subject	Granule diameter	en
dc.subject	Granule size distribution	en
dc.subject	Sludge bed porosity	en
dc.subject	UASB	en
dc.subject	VSS/TSS ratio	en
dc.subject.classification	Environmental Sciences	en
dc.subject.other	ANAEROBIC SLUDGE	en
dc.title	Simple estimation of granule size distribution and sludge bed porosity in a UASB reactor	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Granular sludge is the key factor for an efficient operation of an upflow anaerobic sludge blanket (UASB) reactor. In order to monitor the granularity of anaerobic sludge, the determination of the granule size distribution is of vital importance. Another critical parameter for the UASB reactor performance is the sludge bed porosity. For this reason, several techniques have been proposed, however they are either tedious, imprecise or expensive and hardly applicable in full scale treatment plants. There was then the need for a simple and low cost technique. This technique involves the determination of the settling velocities of a sludge sample and of extrapolating the corresponding diameters using a mathematical algorithm. In the proposed algorithm, the granules density was calculated, the flow regime was examined and finally the granule size distribution was obtained. Some very important correlations were suggested by the experimental results. The granule density and diameter as well as the sludge bed porosity were strongly correlated with the VSS/TSS ratio. Copyright © 2008 Global NEST.	en
heal.publisher	GLOBAL NETWORK ENVIRONMENTAL SCIENCE & TECHNOLOGY	en
heal.journalName	Global Nest Journal	en
dc.identifier.isi	ISI:000254825700010	en
dc.identifier.volume	10	en
dc.identifier.issue	1	en
dc.identifier.spage	73	en
dc.identifier.epage	79	en