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Highly efficient enzymolysis and fermentation of corn stalk into l-lactic acid by enzyme-bacteria friendly ionic liquid pretreatment

引用

Green Chemical Engineering 2022年第4期3卷 321-327页

作者： Yongqing Yang Yuehai Wang Xingmei lu Xu Zheng Dongxia Yan Jiayu Xin Ibrahim El-Tantawy El-Sayed Ying Kang Jiming Yang Beijing Key laboratory of Ionic liquids Clean Process Key Laboratory of Green Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing100190China School of Chemistry and Chemical Engineering University of Chinese Academy of SciencesBeijing100049China Department of Chemistry Faculty of ScienceMenoufia UniversityShebin El-KomMenoufia32511Egypt Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing100190China Dalian National laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China

Ionic liquids(Ils)have been widely used in the pretreatment of ***,the effects of residual Ils on the enzymolysis and fermentation of biomass are still ***,a large quantity of water-washing is usually followed after biomass pretreatment to eliminate the inhibition of residual Ils on subsequent hydrolysis and fermentation *** this work,the effect of choline glycine([Ch][Gly])concentration on the activity of cellulase and Bacillus *** P38 was systematically investigated to explore the impacts of residual Ils on enzymolysis and *** results confirmed that the activities of them were almost not inhibited in low concentrations(less than 0.5 wt%)of[Ch][Gly].Under optimal pretreatment conditions,the maximum cellulose digestibility was 99.23%.Enzymatic hydrolysate was suitable for l-lactic acid fermentation without appreciable inhibition,and the highest sugar-acid conversion rate of 96.33%was obtained by simplified *** work provides an economic route to produce fermentable sugar and l-lactic acid,which shows an industrial application prospect in lignocellulosic biorefinery.

关键词： Corn stalk Biocompatibility Choline glycine Enzymatic hydrolysis l-lactic acid fermentation

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