Primary sludge hydrolysis for biological nutrient removal

Hatziconstantinou, GJ; Yannakopoulos, P; Andreadakis, A

dc.contributor.author	Hatziconstantinou, GJ	en
dc.contributor.author	Yannakopoulos, P	en
dc.contributor.author	Andreadakis, A	en
dc.date.accessioned	2014-03-01T02:41:15Z
dc.date.available	2014-03-01T02:41:15Z
dc.date.issued	1996	en
dc.identifier.issn	0273-1223	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30435
dc.subject	Fermenter	en
dc.subject	Hydrolysis	en
dc.subject	Nutrient removal	en
dc.subject	Primary sludge	en
dc.subject	Soluble carbon	en
dc.subject.classification	Engineering, Environmental	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Water Resources	en
dc.subject.other	Biological nutrient removal	en
dc.subject.other	Carbon source	en
dc.subject.other	Fermentor	en
dc.subject.other	Primary sedimentation	en
dc.subject.other	Primary sludge hydrolysis	en
dc.subject.other	Anaerobic digestion	en
dc.subject.other	Biological sewage treatment	en
dc.subject.other	Carbon	en
dc.subject.other	Chemical oxygen demand	en
dc.subject.other	Denitrification	en
dc.subject.other	Hydrolysis	en
dc.subject.other	Sedimentation	en
dc.subject.other	Solubility	en
dc.subject.other	Wastewater treatment	en
dc.subject.other	carbon	en
dc.subject.other	bioreactor	en
dc.subject.other	chemical oxygen demand	en
dc.subject.other	conference paper	en
dc.subject.other	denitrification	en
dc.subject.other	hydrolysis	en
dc.subject.other	nutrient	en
dc.subject.other	sediment	en
dc.subject.other	sludge clarification	en
dc.subject.other	waste water management	en
dc.title	Primary sludge hydrolysis for biological nutrient removal	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/0273-1223(96)00545-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/0273-1223(96)00545-8	en
heal.language	English	en
heal.publicationDate	1996	en
heal.abstract	Primary sludge hydrolysis can enrich primary effluent with the soluble organics which in turn can be a valuable carbon source to subsequent nutrient removal processes. By controlling hydraulic retention time and temperature it is possible to confine the anaerobic digestion of the primary sludge to the acidogenic and acetogenic phase (hydrolysis/fermentation process), and take advantage of the soluble organics produced. This paper presents the results of a research involving bench and pilot scale experiments related to primary sludge hydrolysis. The pilot scale sedimentation tank (4.10 m in diameter, 3.20 m in depth) operated over an expended period of 21 months as a conventional clarifier and following this as a fermenter unit employing sludge recirculation. Parallel to the pilot scale experiments, several batch and continuous flow bench scale experiments were conducted in order to determine the factors controlling the production of soluble organics and the effect of the tatter on the denitrification process. The conclusions drawn were that a) a soluble COD production of the order of 5-6% in terms of sludge TCOD can be expected in a batch fermenter operating with HRT congruent to 2 days at T less than or equal to 20 degrees C, b) in a continuous flow fermenter, combinations of T > 20 degrees C and SRT > 2 should be applied in order to achieve a production of the order of 10%, c) significant soluble carbon production can be achieved in primary sedimentation tanks (over 30% in terms of influent SCOD) when relatively increased SRTs (4 to 5 days) in combination with sludge recirculation are employed, under T > 22 degrees C, and d) increased denitrification performance of the order of 9 mgNOx/g MLSS.hr, can be achieved with hydrolysate as a carbon source. Copyright (C) 1996 IAWQ.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Water Science and Technology	en
dc.identifier.doi	10.1016/0273-1223(96)00545-8	en
dc.identifier.isi	ISI:A1996VK96000052	en
dc.identifier.volume	34	en
dc.identifier.issue	1-2 -2 pt 1	en
dc.identifier.spage	417	en
dc.identifier.epage	423	en