Succinic acid production from corn stover by simultaneous saccharification and fermentation using <i>Actinobacillus succinogenes</i>.

  • Zheng P
  • Fang L
  • Xu Y
 et al. 
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Simultaneous saccharification and fermentation (SSF) technique was applied for succinic acid production by Actinobacillus succinogenes in a 5-l stirred bioreactor with corn stover as the raw material. The process parameters of SSF, including corn stover pretreatment condition, substrate concentration, enzyme loading and fermentation temperature were investigated. Results indicated that pretreating corn stover with diluted alkaline was beneficial for the succinic acid production, and succinic acid yield could be significantly increased when adding the cellulase supplemented with cellobiase. The maximal succinic acid concentration and yield could reach 47.4g/l and 0.72g/g-substrate, respectively. The corresponding operation conditions were summarized as follows: SSF operation at 38 degrees C for 48h, diluted alkaline pretreated corn stover as substrate with concentration of 70g/l, enzyme loading of 20FPU cellulase and 10U cellobiase per gram substrate. This result suggested an industrial potential of succinic acid production by using SSF and corn stover.

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  • Pu Zheng

  • Lin Fang

  • Yan Xu

  • Jin-Jun Dong

  • Ye Ni

  • Zhi-Hao Sun

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