Continuous acetone-butanol-ethanol (ABE) fermentation and gas production under slight pressure in a membrane bioreactor.
Two rounds of acetone-butanol-ethanol (ABE) fermentation under slight pressure were carried out in the continuous and closed-circulating fermentation (CCCF) system. Spores of the clostridium were observed and counted, with the maximum number of 2.1 × 10(8) and 2.3 × 10(8)ml(-1) separately. The fermentation profiles were comparable with that at atmospheric pressure, showing an average butanol productivity of 0.14 and 0.13 g L(-1)h(-1). Moreover, the average gas productivities of 0.28 and 0.27 L L(-1)h(-1) were obtained in two rounds of CCCF, and the cumulative gas production of 52.64 and 25.92 L L(-1) were achieved, with the hydrogen volume fraction of 41.43% and 38.08% respectively. The results suggested that slight pressures have no obvious effect on fermentation performance, and also indicated the significance and feasibility of gas recovery in the continuous ABE fermentation process.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China; College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
Chunyan
C
Chen
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
Linyuan
L
Wang
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
Guoqing
G
Xiao
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China.
Yucheng
Y
Liu
College of Chemical Engineering, Sichuan University, Chengdu 610065, China. Electronic address: mgch@scu.edu.cn.
Zeyi
Z
Xiao
College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
Qing
Q
Deng
College of Chemical Engineering, Sichuan University, Chengdu 610065, China.
Peina
P
Yao
D000096:Acetone / Q000378:metabolism*; D019149:Bioreactors; D000440:Butanols / Q000378:metabolism*; D002849:Chromatography, Gas; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D005740:Gases; D007700:Kinetics; D008567:Membranes, Artificial; D011312:Pressure
D000440:Butanols; D005740:Gases; D008567:Membranes, Artificial; D000096:Acetone; D000431:Ethanol
ABE fermentation; Gas production; Pervaporation; Under slight pressure