玉米秸秆湿氧化预处理同步糖化发酵酒精

张 强; 殷涌光; Anders Thygesen; Anne Belinda Thomsen

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

摘要

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℃，15 min，Na2CO3 2 g/L，O2 1 200 kPa）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℃ 24 h酶解率达到了67.6%。底物8%（质量分数），经过142 h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1 t玉米秸秆能够产生262.7 kg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。

Abstract: 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.

HTML全文

参考文献(0)

施引文献

资源附件(0)