Detoxification and concentration of corn stover hydrolysate and its fermentation for ethanol production  

作　　者：Qing Li Yingjie Qin Yunfei Liu Jianjun Liu Qing Liu Pingli Li Liqiang Liu 

机构地区：[1]School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China [2]Chembrane Engineering & Technology, Inc., Tianjin 300308, China

出　　处：《Frontiers of Chemical Science and Engineering》2019年第1期140-151,共12页化学科学与工程前沿（英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 21376175).

摘　　要：Environmental and energy concerns have increased interest in renewable energy sources, particularly biofuels. Thus the fermentation of glucose from sulfuric acid-hydrolyzed corn stover for the production of bioethanol has been explored using a combined acid retardation and continuous-effect membrane distillation treatment process. This process resulted in the separation of the sugars and acids from the acid-catalyzed hydrolysate, the removal of most of the fermentation inhibitors from the hydrolysate and the concentration of the detoxified hydrolysate. The recovery rate of glucose from the sugar-acid mixture using acid retardation was greater than 99.12% and the sulfuric acid was completely recovered from the hydrolysate. When the treated com stover hydrolysate, containing 100 g/L glucose, was used as a carbon source, 43.06 g/L of ethanol was produced with a productivity of 1.79 g/(L· h) and a yield of 86.31 %, In the control experiment, where glucose was used as the carbon source these values were 1.97 g/(L·h) and 93.10% respectively. Thus the integration of acid retardation and a continuous-effect membrane distillation process are effective for the production of fuel ethanol from com stover.

关 键 词：com STOVER HYDROLYSATE acid RETARDATION continuous-effect membrane DISTILLATION ethanol FERMENTATION 

分 类 号：TQ[化学工程]