Document Detail


Second-generation bioethanol from eucalypt sulphite spent liquor.
MedLine Citation:
PMID:  20045313     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The spent liquor from acidic sulphite pulping of Eucalyptus globulus (HSSL) is the side product from sulphite pulp production and besides sulphonated lignin contains sugars from degraded hemicelluloses, mainly pentoses. Pichia stipitis fermentation of these sugars for bioethanol production was the primary goal of this work. The increasing of HSSL proportion in fermentation media affected negatively the ethanol yield. Thus with 20% of HSSL (v/v) attained maximum ethanol yield was 0.15 g of ethanol by g of sugar consumed (g(e) g(s)(-1)) and with 60% (v/v) only 0.08 g(e) g(s)(-1). Biological removal of acetic acid from HSSL improved fermentation though the complete removal of acetic acid and polyphenolics (including sulphonated species) by treatment with ion-exchange resins was required for highly successful bioethanol production. Accordingly, the fermentative metabolic pathway of P. stipitis has been promoted allowing fair ethanol productivity and yield (Yp/s = 0.49 g(e) g(s)(-1)) at relatively low maximum of cell growth rate (micro(max) = 0.21 h(-1)).
Authors:
Ana M R B Xavier; Mariana F Correia; Susana R Pereira; Dmitry V Evtuguin
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-31
Journal Detail:
Title:  Bioresource technology     Volume:  101     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-05-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2755-61     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier Ltd. All rights reserved.
Affiliation:
CICECO, Departamento de Qu?mica, Universidade de Aveiro, Campus Universit?rio de Santiago, P-3810-193 Aveiro, Portugal. abx@ua.pt
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MeSH Terms
Descriptor/Qualifier:
Biofuels*
Bioreactors*
Biotechnology / methods*
Ethanol / metabolism*
Eucalyptus / chemistry*
Fermentation
Pichia / metabolism*
Refuse Disposal / methods*
Sulfites / chemistry*
Chemical
Reg. No./Substance:
0/Biofuels; 0/Sulfites; 64-17-5/Ethanol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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