BioChem - DOS

Enhancement of butanol production in Clostridium acetobutylicum SE25 through accelerating phase shift by different phases pH regulation from cassava flour

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

Li, H.g.; Zhang, Q.h.; Yu, X.b.; Wei, L.; Wang, Q.

A prominent delay with 12h was encountered in the phase shift from acidogenesis to solventogenesis in butanol production when the substrate-glucose was replaced by cassava flour. To solve this problem, different phase of pH regulation strategies were performed to shorten this delay time. With this effort, the phase shift occurred smoothly and the fermentation time was shortened. Under the optimal conditions, 16.24g/L butanol and 72h fermentation time were achieved, which were 25.3% higher and 14.3% shorter than those in the case of without pH regulation. Additionally, the effect of CaCO<SUB>3</SUB> on ''acid crash'' and butanol production was also investigated. It was found that organic acids reassimilation would be of benefit to enhance butanol production. These results indicated that the simple but effective approach for acceleration of phase shift is a promising technique for shortening the fermentation time and improvement of butanol production.

2016

Elsevier Applied Science

0960-8524

201

pp.148-155

10.1016/j.biortech.2015.11.027

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART74642626

Clostridium acetobutylicum; ABE fermentation; pH regulation strategy; Phase shift; Cassava flour