Pretreatment of sweet sorghum bagasse for hydrogen production by Caldicellulosiruptor saccharolyticus

Panagiotopoulos, IA; Bakker, RR; De Vrije, T; Koukios, EG; Claassen, PAM

dc.contributor.author	Panagiotopoulos, IA	en
dc.contributor.author	Bakker, RR	en
dc.contributor.author	De Vrije, T	en
dc.contributor.author	Koukios, EG	en
dc.contributor.author	Claassen, PAM	en
dc.date.accessioned	2014-03-01T02:46:56Z
dc.date.available	2014-03-01T02:46:56Z
dc.date.issued	2010	en
dc.identifier.issn	0360-3199	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32950
dc.subject	Alkaline pretreatment	en
dc.subject	Caldicellulosiruptor saccharolyticus	en
dc.subject	Enzymatic hydrolysis	en
dc.subject	Fermentation	en
dc.subject	Hydrogen	en
dc.subject	Sweet sorghum bagasse	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Environmental Sciences	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	Alkaline pretreatment	en
dc.subject.other	Batch experiments	en
dc.subject.other	Caldicellulosiruptor saccharolyticus	en
dc.subject.other	Controlled conditions	en
dc.subject.other	Dry matters	en
dc.subject.other	Energy crops	en
dc.subject.other	Hydrogen production rate	en
dc.subject.other	Hydrogen yields	en
dc.subject.other	Metabolic products	en
dc.subject.other	Monomeric sugars	en
dc.subject.other	Normal growth	en
dc.subject.other	Optimal conditions	en
dc.subject.other	PH control	en
dc.subject.other	Pre-Treatment	en
dc.subject.other	Substrate concentrations	en
dc.subject.other	Sugar concentration	en
dc.subject.other	Sweet sorghum	en
dc.subject.other	Sweet sorghum bagasse	en
dc.subject.other	Thermophilic bacteria	en
dc.subject.other	Agricultural wastes	en
dc.subject.other	Bacteria	en
dc.subject.other	Bagasse	en
dc.subject.other	Body fluids	en
dc.subject.other	Cellulose	en
dc.subject.other	Crops	en
dc.subject.other	Delignification	en
dc.subject.other	Fermentation	en
dc.subject.other	Gas producers	en
dc.subject.other	Hydrogen production	en
dc.subject.other	Lactic acid	en
dc.subject.other	Organic acids	en
dc.subject.other	Substrates	en
dc.subject.other	Sugar (sucrose)	en
dc.subject.other	Enzymatic hydrolysis	en
dc.subject.other	Bacteria	en
dc.subject.other	Bagasse	en
dc.subject.other	Cellulose	en
dc.subject.other	Delignification	en
dc.subject.other	Enzymolysis	en
dc.subject.other	Fermentation	en
dc.subject.other	Fluid	en
dc.subject.other	Hydrogen	en
dc.subject.other	Lactic Acid	en
dc.subject.other	Plant Residues	en
dc.subject.other	Pretreatment	en
dc.subject.other	Sorghum	en
dc.subject.other	Substrates	en
dc.subject.other	Sugar	en
dc.title	Pretreatment of sweet sorghum bagasse for hydrogen production by Caldicellulosiruptor saccharolyticus	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.ijhydene.2010.05.075	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijhydene.2010.05.075	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Pretreatment of sweet sorghum bagasse, an energy crop residue, with NaOH for the production of fermentable substrates, was investigated. Optimal conditions for the alkaline pretreatment of sweet sorghum bagasse were realized at 10% NaOH (w/w dry matter). A delignification of 46% was then observed, and improved significantly the efficiency of enzymatic hydrolysis. Under hydrolysis conditions without pH control, up to 50% and 41% of the cellulose and hemicellulose contained in NaOH-pretreated sweet sorghum bagasse were converted by 24 h enzymatic hydrolysis to soluble monomeric sugars. The extreme thermophilic bacterium Caldicellulosiruptor saccharolyticus showed normal growth on hydrolysates of NaOH-pretreated biomass up to a sugar concentration of 20 g/L. Besides hydrogen, the main metabolic products detected in the fermentations were acetic and lactic acid. The maximal hydrogen yield observed in batch experiments under controlled conditions was 2.6 mol/mol C6 sugar. The maximal volumetric hydrogen production rate ranged from 10.2 to 10.6 mmol/(L h). At higher substrate concentrations the production of lactic acid increased at the expense of hydrogen production. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Hydrogen Energy	en
dc.identifier.doi	10.1016/j.ijhydene.2010.05.075	en
dc.identifier.isi	ISI:000281383900010	en
dc.identifier.volume	35	en
dc.identifier.issue	15	en
dc.identifier.spage	7738	en
dc.identifier.epage	7747	en