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Chemistry and Industry of Forest Products ›› 2016, Vol. 36 ›› Issue (2): 121-128.doi: 10.3969/j.issn.0253-2417.2016.02.018

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Ethanol Production from Mixture of Furfural Residues and Cassava Residues by Simultaneous Saccharification and Fermentataion

JI Li1, ZHAO Peng-xiang1,2, YOU Yan-zhi1, BU Ling-xi2, JIANG Jian-xin1   

  1. 1. College of Material Science and Technology, MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 10083, China;
    2. Beijing Biomass Energy Technology Center, State Grid Energy Conservation Service Ltd., Beijing 100053, China
  • Received:2015-07-07 Online:2016-04-25 Published:2016-04-26

Abstract: Simultaneous saccharification and fermentation (SSF) of furfural residues (FR) pretreated with green liquor and hydrogen peroxide (GL-H2O2) mixed with cassava residues(CR)with the addition of Sapindus mukurossi saponin to product ethanol was investigated in present study. The SSF was optimized by changing the substrate concentration, dosage of cellulase and the addition of saponin, and the corresponding concentrations of ethanol and by-products were analyzed. The results indicated that 56.5% furfural lignin was removed after 5 g/L substrate was treated by 0.6 g/g H2O2 and 2 mL/g GL, at 80 ℃ for 3 h. The ethanol concentration after SSF was 56.6 g/L, which was equivalent to the theoretical ethanol yield of 86.3%, as the mixture of pretreated FR and cassava residues with a mass ratio of 2:1 were fermented with the aid of 0.5 g/L Sapindus mukurossi saponin, 12 FPU/g cellulose, and 15 IU/g cellobiose enzyme, for 120 h. Moreover, the amounts of cellulose and generation of by-products were declined when the Sapindus mukurossi saponin was added, and the fluctuation of glycerol production was minimized.

Key words: furfural residues, cassava residues, mixed substrates, Sapindus mukurossi saponin, simultaneous saccharification and fermentation, ethanol

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