Water-recycled Cassava Bioethanol Production Integrated with Two-stage UASB Treatment  

作　　者：孙付保 毛忠贵 张建华 张宏建 唐蕾 张成明 张静 翟芳芳 

机构地区：[1]Key Laboratory of Industrial Biotechnology, Ministry of Education, Wuxi 214122, China [2]Fermentation and Ecological Engineering Laboratory (FEEL), School of Biotechnology, Jiangnan University, Wuxi 214122, China

出　　处：《Chinese Journal of Chemical Engineering》2010年第5期837-842,共6页中国化学工程学报（英文版）

基　　金：Supported by the National High Technology Research and Development Program of China （2008AA10Z338）; the National Natural Science Foundation of China （20906041）

摘　　要：Considering limited success in target-hitting discharge from alcohol industry, our attention was directed toward a recycling use of distillery spentwash (DS) in cassava bioethanol production by using a two-stage up-flow anaerobic sludge blanket bioremediation (TS-UASBB). With the TS-UASBB, 2 4 SO , COD, N and P in the effluent from the DS degraded significantly and their concentrations were kept at 0.2 g·L -1 , 2.0 g·L -1 , 1.0 g·L -1 and 15 mg·L -1 , respectively, in 13 batch processes for water-recycled ethanol fermentation. With the effluent used directly as dilution water, no heat-resistant bacteria were found alive. The thirteen-batch ethanol production individually achieved 10% after 48 h fermentation. The starch utilization ratio and total sugar consumption were 90% and 99.5%, respectively. The novel water-recycled bioethanol production process with ethanol fermentation and TS-UASBB has a considerable potential in other starchy and cellulosic ethanol production.Considering limited success in target-hitting discharge from alcohol industry, our attention was directed toward a recycling use of distillery spentwash （DS） in cassava bioethanol production by using a two-stage up-flow anaerobic sludge blanket bioremediation （TS-UASBB）. With the TS-UASBB, 2 4 SO , COD, N and P in the effluent from the DS degraded significantly and their concentrations were kept at 0.2 g·L -1 , 2.0 g·L -1 , 1.0 g·L -1 and 15 mg·L -1 , respectively, in 13 batch processes for water-recycled ethanol fermentation. With the effluent used directly as dilution water, no heat-resistant bacteria were found alive. The thirteen-batch ethanol production individually achieved 10% after 48 h fermentation. The starch utilization ratio and total sugar consumption were 90% and 99.5%, respectively. The novel water-recycled bioethanol production process with ethanol fermentation and TS-UASBB has a considerable potential in other starchy and cellulosic ethanol production.

关 键 词：CASSAVA bioethanol production thermophilic and mesophilic up-flow anaerobic sludge blanket distillery spentwash recycle and reuse 

分 类 号：X53[环境科学与工程—环境工程] TQ223.122[化学工程—有机化工]