玉米秸秆湿氧化预处理同步糖化发酵酒精  

Ethanol production from wet oxidized corn straw by simultaneous saccharification and fermentation

作　　者：张强[1,2] 殷涌光[1] Anders Thygesen Anne Belinda Thomsen 

机构地区：[1]吉林大学生物与农业工程学院,长春130025 [2]长春理工大学生命科学技术学院,长春130022 [3]Biosystems Division,Risφ DTU,Technical University of Denmark

出　　处：《农业工程学报》2010年第9期292-295,共4页Transactions of the Chinese Society of Agricultural Engineering

基　　金：吉林省教育厅科技项目(200623);吉林省科技发展农业重点项目(20030203)

摘　　要：为了找到适合的玉米秸秆生产酒精工艺,该文采用碱性湿氧化预处理(195℃,15min,Na2CO32g/L,O21200kPa)与同步糖化发酵对玉米秸秆制备酒精进行了研究。结果表明:经过预处理,90%纤维素保留在固体中,回收率为95.87%。固体部分利用纤维素酶处理,在50℃24h酶解率达到了67.6%。底物8%(质量分数),经过142h同步糖化发酵,酒精产量达到了理论酒精产量的79.0%。假定五碳糖和六碳糖都能够被利用,相当于1t玉米秸秆能够产生262.7kg的酒精。发酵过程中没有明显的抑制作用。该文为玉米秸秆发酵生产酒精提供了试验数据。In order to find out the appropriate process for ethanol production from corn straw,alkaline wet-oxidation pretreatment （195℃,15 min,Na2CO3 2 g/L,O2 1 200 kPa） and simultaneous saccharification and fermentation （SSF） were adopted to produce ethanol.The results showed that 90% of cellulose remained in the solid fraction and recovery of cellulose was 95.87% after pretreatment.After 24 h hydrolysis at 50℃ using cellulase,the achieved conversion of cellulose to glucose was about 67.6%.After 142 h of SSF with substrate concentration of 8%,ethanol yield of 79.0% of the theoretical was obtained.The estimated total ethanol production was 262.7 kg/t raw material by assuming the consumption of both C-6 and C-5.No obvious inhibition effect occurred during SSF.These offered experiment evidences for ethanol production from corn straw.

关 键 词：秸秆 纤维素 乙醇 预处理 同步糖化发酵 湿氧化 

分 类 号：TK6[动力工程及工程热物理—生物能]