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Photofermentation of crude glycerol from biodiesel using Rhodopseudomonas palustris: Comparison with organic acids and the identification of inhibitory compounds.
MedLine Citation:
PMID:  23334033     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The growth of the biodiesel industry, and its concurrent production of glycerol, has lowered the price of glycerol 20-fold. While many options for using this glycerol have been proposed, the size of the waste stream means that generation of fuels is likely to be the only viable route. One such fuel is hydrogen, production of which can be achieved biologically. The photofermentation of glycerol to hydrogen using Rhodopseudomonas palustris was investigated by exploring the growth rate, hydrogen production rate and hydrogen yield. R. palustris grows on glycerol at a rate of 0.074h(-1), and photoferments glycerol into 97mol% hydrogen at a conversion efficiency nearing 90% of the 7mol H(2) theoretical maximum at a rate of 34mlH(2)/g(dw)/h. Some inhibition of growth by crude glycerol was seen. This was determined to be caused by saponified fatty acids, removal of which yielded a treated crude glycerol which showed no inhibition.
Authors:
Robert W M Pott; Christopher J Howe; John S Dennis
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-8
Journal Detail:
Title:  Bioresource technology     Volume:  130C     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2013-1-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  725-730     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier Ltd. All rights reserved.
Affiliation:
Department of Chemical Engineering and Biotechnology, University of Cambridge, New Museums Site, Pembroke Street, Cambridge CB2 3RA, UK. Electronic address: rwmp2@cam.ac.uk.
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