Direct ethanol production from dextran industrial waste water by Zymomonas mobilis

作者：He Ming xiong^*; Qin Han; Yin Xiao bo; Ruan Zhi yong; Tan Fu rong; Wu Bo; Shui Zong xia; Dai Li chun; Hu Qi chun

来源：Korean Journal of Chemical Engineering, 2014, 31(11): 2003-2007.

DOI：10.1007/s11814-014-0108-1

• Ethanol
• Dextran Industrial Waste Water
• Zymomonas mobilis
• Batch Fermentation
• Kinetic Parameters
• Semi-continuous Fermentation

The direct production of ethanol from dextran industrial waste water was investigated by using Zymomonas mobilis via batch and semi-continuous fermentation mode. In batch fermentation, pretreated waste water (unsterilized and sterilized), pH value (3.8 and 6.0), and Mg2+ (with and without) was compared with OD 600, sugar and ethanol concentration. After 24 h fermentation, sugar in the dextran waste water was almost exhausted, and the amount of ethanol accumulated reached 24.33-29.92 g/l, which is nearly 99% of the theoretical yield of ethanol. Kinetic parameters of Z. mobilis in batch fermentation were also investigated. The raw dextran waste water was also used in semi-continuous fermentation. After 48 h fermentation, the production of ethanol was 28.65 g/l. These results indicated that dextran waste water may be used as a candidate substrate and Z. mobilis could convert the raw material into ethanol directly.

• 出版日期2014-11
• 单位中国农业科学院农业资源与农业区划研究所