Enhanced thermophilic fermentative hydrogen production from cassava stillage by chemical pretreatments.
Enhanced thermophilic fermentative hydrogen production from cassava stillage by chemical pretreatments.
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DOI：
10.2166/wst.2013.218
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发表时间：
2013-07
期刊：
影响因子：
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通讯作者：
Wen Wang;G. Luo;Li Xie;Qi Zhou
中科院分区：
文献类型：
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作者：
Wen Wang;G. Luo;Li Xie;Qi Zhou
本研究研究了酸和碱预处理以提高木薯酒糟产氢的效果。结果表明，酸预处理适合增强可溶性碳水化合物，而碱预处理则刺激木薯酒糟产生更多可溶性总有机碳。因此，与碱预处理相比，酸预处理具有更高的促进氢气产生的能力。响应面法还揭示了预处理温度、时间和酸浓度对产氢的影响。结果表明，所有因素的增加都增加了可溶性碳水化合物的产生，而当因素超过其最佳值时，氢气的产生受到抑制。最佳产氢条件为预处理温度89.5 ℃、浓度1.4%、时间69 min，最高产氢量为434 mL，比生木薯酒糟高67%。
Acid and alkaline pretreatments for enhanced hydrogen production from cassava stillage were investigated in the present study. The result showed that acid pretreatment was suitable for enhancement of soluble carbohydrate while alkaline pretreatment stimulated more soluble total organic carbon production from cassava stillage. Acid pretreatment thereby has higher capacity to promote hydrogen production compared with alkaline pretreatment. Effects of pretreatment temperature, time and acid concentration on hydrogen production were also revealed by response surface methodology. The results showed that the increase of all factors increased the soluble carbohydrate production, whereas hydrogen production was inhibited when the factors exceeded their optimal values. The optimal conditions for hydrogen production were pretreatment temperature 89.5 °C, concentration 1.4% and time 69 min for the highest hydrogen production of 434 mL, 67% higher than raw cassava stillage.