| Literature DB >> 23973982 |
Guangli Cao1, Eduardo Ximenes2, Nancy N Nichols3, Leyu Zhang2, Michael Ladisch4.
Abstract
Removal of enzyme inhibitors released during lignocellulose pretreatment is essential for economically feasible biofuel production. We tested bio-abatement to mitigate enzyme inhibitor effects observed in corn stover liquors after pretreatment with either dilute acid or liquid hot water at 10% (w/v) solids. Bio-abatement of liquors was followed by enzymatic hydrolysis of cellulose. To distinguish between inhibitor effects on enzymes and recalcitrance of the substrate, pretreated corn stover solids were removed and replaced with 1% (w/v) Solka Floc. Cellulose conversion in the presence of bio-abated liquors from dilute acid pretreatment was 8.6% (0.1x enzyme) and 16% (1x enzyme) higher than control (non-abated) samples. In the presence of bio-abated liquor from liquid hot water pretreated corn stover, 10% (0.1x enzyme) and 13% (1x enzyme) higher cellulose conversion was obtained compared to control. Bio-abatement yielded improved enzyme hydrolysis in the same range as that obtained using a chemical (overliming) method for mitigating inhibitors.Entities:
Keywords: Bio-abatement; Biomass liquor; Enzymatic hydrolysis; Inhibitors
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Year: 2013 PMID： 23973982 DOI： 10.1016/j.biortech.2013.07.112
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642