| http://www.w3.org/ns/prov#value | - The fermentation process by C. acetobutylicum is divided into two distinct phases: rapid cell growth and production of butyric acids take place in a first acidogenic phase accompanied by pH decrease, which is then replaced by a second solventogenic phase in which butanol and other solvents (mainly acetone and ethanol) are produced, leading to pH increase (Bryant and Blaschek 1988; Holt et al. 1984
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