Abstract：
:Consolidated bioprocessing (CBP) of lignocellulose by bacterial consortium for isopropanol production is considered as the most promising strategy. However, low utilization of xylan caused by the complex sidechain structure remains inhibit the conversion of full-biomass. In this study, isopropanol production from different lignocelluloses by the consortium EMSD5 through CBP was performed. A total of 7.00 g/L of isopropanol was obtained from corncob by optimizing fermentation conditions. Isopropanol production by EMSD5 was mainly based on utilizing xylan in corncob and isopropanol titer was increased by 47.71% and reached up to 8.39 g/L using arabinoxylan compared with linear xylan. The analysis of community structures and the isolation of key strain confirmed the enrichment of the isopropanol producer, Clostridium beijierinckii, in the bacterial community when it was incubated with corn glucuronoarabinoxylan and the cooperation between C. beijerinckii and lignocellulose degraders. The unique features of EMSD5 could lead to large-scale isopropanol production using lignocellulose.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Liu L,Yang J,Yang Y,Luo L,Wang R,Zhang Y,Yuan Hdoi
10.1016/j.biortech.2019.121965subject
Has Abstractpub_date
2019-11-01 00:00:00pages
121965eissn
0960-8524issn
1873-2976pii
S0960-8524(19)31195-2journal_volume
292pub_type
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