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bce ›› 2016, Vol. 50 ›› Issue (3): 41-45.doi: 10.3969/j.issn.1673-5854.2016.03.007

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Effects of Byproducts Obtained from Alkali or Acid Pretreatment of Miscanthus Biomass on Yeast Fermentation

SI Sheng-li1,2,3, LI Ming1,2, JIA Jun1,4, LI Qing1,5, HAO Bo1,2, WANG Yan-ting1,4, PENG Liang-cai1,2,4, TU Yuan-yuan1,4   

  1. 1. Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China;
    2. College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;
    3. College of Environment and Life Science, Kaili University, Kaili 556011, China;
    4. College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China;
    5. College of Science, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2015-10-13 Online:2016-05-31 Published:2016-06-03

Abstract: Total supernatants were obtained from various alkali or acid pretreatments of Miscanthus biomass in order to detect the released byproducts and the ethanol production by yeast fermentation.And the correlations of byproducts and ethanol fermentation were analyzed.The results showed that concentrations of byproducts in supernatant obtained by different pretreatments were different.The contents of furfural and 5-hydroxymethylfurfural of acid pretreatment were higher than those of alkali pretreatment.And the contents of vanillin,p-coumaric acid,ferulic acid of alkali preteratment were higher.In the feeding glucose fermentaion of supernatant,the sugar-alcohol conversion efficiency of 1% H2SO4 pretreatment was higher than that of 10 g/L NaOH.The hemicelluloses and lignin contents in raw Miscanthus biomass materials respectively exhibited positive and negative effects on sugar-ethanol conversion rate.Correlative analysis indicated that vanillin and syringic acid exhibited negative effects on ethanol production,while 5-HMF was a positive factor.

Key words: Miscanthus, byproduct, chemical pretreatment, yeast fermentation, sugar-ethanol conversion rate

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