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| 1 | 酒精-沼气双发酵耦联工艺中丙酸对酿酒酵母酒精发酵的影响(英文)显示文摘Propanoic acid accumulated in an ethanol-methane coupled fermentation process affects the ethanol fermentation by Saccharomyces cerevisiae. The effects of propanoic acid on ethanol production were examined in cassava mash under different pH conditions. Final ethanol concentrations increased when undissociated propanoic acid was <30.0 mmol·L-1 . Propanoic acid, however, stimulated ethanol production, as much as 7.6% under proper conditions, but ethanol fermentation was completely inhibited when undissociated acid was >53.2 mmol·L-1 . Therefore, the potential inhibitory effect of propanoic acid on ethanol fermentation may be avoided by controlling the undissociated acid concentrations through elevated medium pH. Biomass and glycerol production decreased with propanoic acid in the medium, partly contributing to increased ethanol concentration. | 张成明 杜风光 王欣 毛忠贵 孙沛勇 唐蕾 张建华 | 2012 | Chinese Journal of Chemical Engineering2012，20，5： | 1 |
| 2 | “酒精沼气双发酵耦联”工艺的探讨——硫化物对木薯酒精发酵的影响显示文摘木薯酒精发酵时,采用'酒精沼气双发酵耦联'工艺会积累SO42-及其还原产物,对'双发酵耦联'工艺的顺利进行不利,为解决该问题,研究了硫酸盐、亚硫酸盐以及S2-对木薯酒精高浓发酵(料水比1∶2.2)的影响,结果表明,SO42-对木薯酒精发酵基本没有影响,而SO32-和S2-对木薯酒精发酵影响显著。在实验所添加的SO32-和S2-浓度范围内,随着硫化物浓度的增加,酒精产量逐渐降低,而副产物甘油产量逐渐升高;并且S2-的加入使发酵时间延长,当S2-浓度为6.0 mmol/L时,发酵时间延迟48 h。后两者均对乙醇发酵不利,应在双循环耦联工艺中去除。 | 姜立 张成明 张宏健 毛忠贵 | 2011 | 食品与发酵工业2011，37，10： | 1 |
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