Document Detail


Injection of air into the headspace improves fermentation of phosphoric acid pretreated sugarcane bagasse by Escherichia coli MM170.
MedLine Citation:
PMID:  21531547     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Microaeration (injecting air into the headspace) improved the fermentation of hemicellulose hydrolysates obtained from the phosphoric acid pretreatment of sugarcane bagasse at 170°C for 10min. In addition, with 10% slurries of phosphoric acid pretreated bagasse (180°C, 10min), air injection into the headspace promoted xylose utilization and increased ethanol yields from 0.16 to 0.20g ethanol/g bagasse dry weight using a liquefaction plus simultaneous saccharification and co-fermentation process (L+SScF). This process was scaled up to 80L using slurries of acid pretreated bagasse (96h incubation; 0.6L of air/min into the headspace) with ethanol yields of 312-347L (82-92gal) per tonne (dry matter), corresponding to 0.25 and 0.27g/g bagasse (dry weight). Injection of small amounts of air into the headspace may provide a convenient alternative to subsurface sparging that avoids problems of foaming, sparger hygiene, flotation of particulates, and phase separation.
Authors:
I U Nieves; C C Geddes; M T Mullinnix; R W Hoffman; Z Tong; E Castro; K T Shanmugam; L O Ingram
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-4-15
Journal Detail:
Title:  Bioresource technology     Volume:  -     ISSN:  1873-2976     ISO Abbreviation:  -     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-5-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Ltd.
Affiliation:
Department of Microbiology & Cell Science, University of Florida, Box 110700, Gainesville, FL 32611, USA.
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