Physical and chemical properties of activated sludge floc

Andreadakis, AD

dc.contributor.author	Andreadakis, AD	en
dc.date.accessioned	2014-03-01T01:09:30Z
dc.date.available	2014-03-01T01:09:30Z
dc.date.issued	1993	en
dc.identifier.issn	0043-1354	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11039
dc.subject	Activated sludge	en
dc.subject	Exocellular polymers	en
dc.subject	Floc density	en
dc.subject	Floc size	en
dc.subject	Floc specific surface area	en
dc.subject	Non-filamentous bulking	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Water Resources	en
dc.subject.other	Activated sludge floc	en
dc.subject.other	Chemical properties	en
dc.subject.other	Exocellular polymers	en
dc.subject.other	Floc density	en
dc.subject.other	Floc size	en
dc.subject.other	Non-filamentous bulking	en
dc.subject.other	Specific surface area	en
dc.subject.other	Colloids	en
dc.subject.other	Physical properties	en
dc.subject.other	Polymers	en
dc.subject.other	Sewage sludge	en
dc.subject.other	dye	en
dc.subject.other	activated sludge	en
dc.subject.other	adsorption	en
dc.subject.other	article	en
dc.subject.other	correlation function	en
dc.subject.other	coulter counter	en
dc.subject.other	density	en
dc.subject.other	flocculation	en
dc.subject.other	particle size	en
dc.subject.other	phase contrast microscopy	en
dc.subject.other	technique	en
dc.subject.other	waste water management	en
dc.subject.other	Activated	en
dc.subject.other	Flocculants	en
dc.subject.other	Properties	en
dc.subject.other	Sewage Treatment	en
dc.subject.other	Sludge	en
dc.title	Physical and chemical properties of activated sludge floc	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/0043-1354(93)90107-S	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0043-1354(93)90107-S	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	Physical and chemical characteristics of activated sludge such as floc size, density, specific surface, carbohydrate content, dehydrogenase activity and settleability were investigated by seven parallel bench scale activated sludge units operated under different sludge ages (1.1-17.4 days). The analytical methods used included a dye adsorption technique for specific surface area determinations, the Coulter Counter method for floc size measurements and interference microscopy for floc density determinations. The typical floc sizes were found to be in the range 10-70 mum with floc densities in the range 1.015-1.034 g cm-3. A strong correlation between floc density and size was obtained. The specific surface areas measured (typically 100-200 m2 g-1 dry sludge) were found to be one to two orders of magnitude higher than the corresponding geometric floc surface areas, indicating a porous floc structure. Sludge settleability, for non-filamentous sludges, was well correlated to both floc size, density and specific surface area, but not to the sludge carbohydrate content, which was found to vary between 6 and 18%.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Water Research	en
dc.identifier.doi	10.1016/0043-1354(93)90107-S	en
dc.identifier.isi	ISI:A1993LZ03100002	en
dc.identifier.volume	27	en
dc.identifier.issue	12	en
dc.identifier.spage	1707	en
dc.identifier.epage	1714	en