Increase of biogas production through co-digestion of lipids and sewage sludge

Noutsopoulos, C; Mamais, D; Antoniou, K; Avramides, C

dc.contributor.author	Noutsopoulos, C	en
dc.contributor.author	Mamais, D	en
dc.contributor.author	Antoniou, K	en
dc.contributor.author	Avramides, C	en
dc.date.accessioned	2014-03-01T02:09:20Z
dc.date.available	2014-03-01T02:09:20Z
dc.date.issued	2012	en
dc.identifier.issn	11084006	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29820
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-84862986516&partnerID=40&md5=41e09077ed5694cd362fe022cdcbd994	en
dc.subject	Biogas	en
dc.subject	Co-digestion	en
dc.subject	Grease	en
dc.subject	Lipids	en
dc.subject	Long chain fatty acids	en
dc.subject	Methane potential	en
dc.subject	Sewage sludge	en
dc.title	Increase of biogas production through co-digestion of lipids and sewage sludge	en
heal.type	journalArticle	en
heal.publicationDate	2012	en
heal.abstract	The aim of this study was to assess the feasibility of co-digesting lipids originated from domestic wastewater along with sewage sludge. Three lab-scale single stage mesophilic anaerobic digesters were operated under a constant hydraulic retention time (15 days). One system (C) was fed on a daily basis with sewage sludge and served as the control system and its operation was compared with two experimental systems (E1 and E2). Both experimental systems received mixtures of sludge and lipids with different lipids content (20% for system E1 and 60% for system E2 on a VS basis), whereas organic loadings were 2 KgVS m-3 d-1 and 3,5 KgVS m-3 d-1 for systems E1 and E2, respectively. According to the results it can be stated that the addition of lipids to sewage sludge up to 60% on a VS basis resulted in a significant increase of biogas production without producing any severe effects on the properties of the digested sludge. More specifically biogas production of reactor E1 was 18% greater than that of reactor C, whereas biogas produced in reactor E2 was even greater (50% higher than that of reactor C). Finally it is interesting that during start-up a lag phase was recorded at reactor E2 before biogas production initiated, which should be attributed to the time required for growth of acetogenic bacteria capable to degrade LCFA. © 2012 Global NEST Printed in Greece. All rights reserved.	en
heal.journalName	Global Nest Journal	en
dc.identifier.volume	14	en
dc.identifier.issue	2	en
dc.identifier.spage	133	en
dc.identifier.epage	140	en