Effect of Acetic Acid and Propanoic Acid on Ethanol Fermentation by Saccharomyces cerevisiae in an Ethanol-Methane Coupled Fermentation Process
C.M. Zhang
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China ; Fermentation and Ecological Engineering Laboratory, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
J.H. Zhang
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China ; Fermentation and Ecological Engineering Laboratory, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
L. Tang
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China ; Fermentation and Ecological Engineering Laboratory, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
Z.G. Mao
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China ; Fermentation and Ecological Engineering Laboratory, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
R.S. Zhu
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China ; Fermentation and Ecological Engineering Laboratory, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
H.J. Zhang
The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China ; Fermentation and Ecological Engineering Laboratory, School of Biotechnology, Jiangnan University, Wuxi 214122, P.R. China
Corresponding Author(s) : Z.G. Mao
zhangchengming01@163.com; feelingmao@hotmail.com
Asian Journal of Chemistry,
Vol. 23 No. 10 (2011): Vol 23 Issue 10
Waste distillage can be fully recycled in an ethanol-methane coupled fermentation process. In this process, waste distillage from ethanol fermentation was first treated in an anaerobic digestion and then the effluent used for the next ethanol fermentation batch. Organic acids, mainly acetic acid and propanoic acid, contained in the effluent could potentially inhibit the ethanol fermentation. The effects of organic acids on ethanol fermentation were investigated in this study. Results indicated that, to avoid ethanol fermentation inhibition, aceticacetic acid and propanoic acid in the medium should be < 80 and < 30 mM, respectively. Interestingly, ethanol production increased 20 and 13 % in the presence of 20 mM of aceticacetic acid and propanoic acid, respectively. Decreased by-product production, biomass and glycerol could have contributed to the increased ethanol production.
Zhang, C., Zhang, J., Tang, L., Mao, Z., Zhu, R., & Zhang, H. (2011). Effect of Acetic Acid and Propanoic Acid on Ethanol Fermentation by Saccharomyces cerevisiae in an Ethanol-Methane Coupled Fermentation Process. Asian Journal of Chemistry, 23(10), 4701–4704. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/10952
