Optimization of Bio-based Succinic Acid Production from Hardwood Using the Two Stage pretreatments

  • Jung, Ji Young (Division of Environmental Forest Science, Gyeongsang National University, Institute of Agriculture & Life Sciences) ;
  • Jo, Jong Soo (Gyeongnam National University of Science and Technology, Department of Interior Materials Engineering) ;
  • Kim, Young Wun (Korea Research Institute of Chemical Technology) ;
  • Yoon, Byeng Tae (Korea Research Institute of Chemical Technology) ;
  • Kim, Choon Gil (SK Energy Institute of Technology) ;
  • Yang, Jae Kyung (Division of Environmental Forest Science, Gyeongsang National University, Institute of Agriculture & Life Sciences)
  • Received : 2012.11.23
  • Accepted : 2013.03.07
  • Published : 2013.03.25


The steam explosion-chemical pretreatment is a more effective wood pretreatment technique than the conventional physical pretreatment by accelerating reactions during the pretreatment process. In this paper, two-stage pretreatment processes of hardwood were investigated for its enzymatic hydrolysis and the succinic acid yield from the pretreated solid. The first stage pretreatment was performed under conditions of low severity to optimize the amount of solid recovery. In the second stage pretreatment washed solid material from the first stage pretreatment step was impregnated again with chemical (alkaline or chlorine-based chemicals) to remove a portion of the lignin, and to make the cellulose more accessible to enzymatic attack. The effects of pretreatment were assessed by enzymatic hydrolysis and fermentation, after the two stage pretreatments. Maximum succinic acid yield (16.1 g $L^{-1}$ and 77.5%) was obtained when the two stage pretreatments were performed at steam explosion -3% KOH.



Supported by : Korea Forest Service, Ministry of Knowledge Economy


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