Solid simultaneous saccharification and fermentation of rice straw for bioethanol production using nitrogen gas stripping
Solid simultaneous saccharification and fermentation of rice straw for bioethanol production using nitrogen gas stripping
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稻草固体同步糖化发酵氮气吹脱生产生物乙醇
DOI：
10.1039/c5ra07899g
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发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Hou Chang-Jun
中科院分区：
文献类型：
--
作者：
Wang Yong-Zhong;Liao Qiang;Lv Feng-Lin;Zhu Xun;Ran Yao;Hou Chang-Jun
以稻草为原料，采用氮气吹脱法进行固态同步糖化发酵生产乙醇。研究了N2流量、酵母接种量和基质含水量对SSSF的影响。乙醇的最高总产量为4.78 g，并且使用30 mL min-1的N2流速、20 mL的酵母接种体积和4.6 mL（水）/g（底物）的水分含量获得的最高乙醇产率为56.3%。底物中乙醇和葡萄糖的低残留表明N2载气有效地将产生的乙醇从填充床中汽提出来，减轻了由残留在生物反应器中的析出的葡萄糖和乙醇引起的抑制。随着N2流量或基质含水量的增加，乙醇总产量和乙醇产率先增加后降低。但随着酵母接种量的增加，这两个指标先上升，然后保持相对稳定。
Solid simultaneous saccharification and fermentation (SSSF) of rice straw for ethanol production using N2 stripping was developed. The effects of N2 flow rate, yeast inoculation amount, and substrate moisture content on SSSF were investigated. The highest total output of ethanol was 4.78 g, and the highest ethanol yield obtained was 56.3% using an N2 flow rate of 30 mL min−1, a yeast inoculation volume of 20 mL, and a moisture content of 4.6 mL (water) per g (substrate). The low residuals of ethanol and glucose in the substrate demonstrate that the N2 carrier gas effectively stripped the produced ethanol out of the packed bed, alleviating the inhibitions caused by evolved glucose and ethanol remaining in the bioreactor. With an increase in N2 flow rate or substrate moisture content, the total output of ethanol and ethanol yield initially increased and then decreased. However, with the increase in yeast inoculation volume, both indexes first rose and then remained relatively constant.