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Cellulase Production from Spent Lignocellulose Hydrolysates with Recombinant Aspergillus niger
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2009 (English)In: Applied and environmental microbiology, ISSN 1098-5336, Vol. 75, no 8, 2366-74 p.Article in journal (Refereed) Published
Abstract [en]

A recombinant Aspergillus niger strain expressing the Hypocrea jecorina endoglucanase Cel7B was grown on spent hydrolysates (stillage) from sugarcane bagasse and spruce wood. The spent hydrolysates served as excellent growth media for the Cel7B producing strain, A. niger D15[egI], which displayed higher endoglucanase activities in the spent hydrolysates than in standard medium with comparable monosaccharide content (e.g. 2100 nkat/mL in spent bagasse hydrolysate compared to 480 nkat/mL in standard glucose-based medium). In addition, A. niger D15[egI] was also able to consume or convert other lignocellulose-derived compounds, such as acetic acid, furan aldehydes and phenolic compounds, which are recognized as inhibitors of yeast during ethanolic fermentation. The results indicate that enzymes can be produced from the stillage stream as a high-value co-product in second-generation bioethanol plants in a way that also facilitates recirculation of process water.

Place, publisher, year, edition, pages
American Society for Microbiology , 2009. Vol. 75, no 8, 2366-74 p.
Identifiers
URN: urn:nbn:se:umu:diva-21152DOI: 10.1128/AEM.02479-08PubMedID: 19251882OAI: oai:DiVA.org:umu-21152DiVA: diva2:210673
Available from: 2009-04-03 Created: 2009-04-03 Last updated: 2009-11-24Bibliographically approved

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Jönsson, Leif J

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