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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (1): 77-84.doi: 10.3969/j.issn.0253-2417.2021.01.011

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Preparation of Xylooligosaccharides and Monosaccharides from Bamboo Chips by Liquid Hot Water Pretreatment

Yunni ZHAN1, Chen HUANG1,2, Xin HAO2, Zimeng WANG2, Yongjun DENG1,2, Guigan FANG1,2,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2020-07-15 Online:2021-02-28 Published:2021-03-03
  • Contact: Guigan FANG E-mail:fangguigan@icifp.cn


Effects of liquid hot water pretreatment(LHWP) on the chemical composition, enzymatic digestibility, and xylooligosaccharides(XOS)concentration were investigated in Bambusa emeiensis. In addition, the physical and chemical structural variationsof thesamples before and after the pretreatment were studied using a X-ray diffraction(XRD)spectrometer and Fourier transform infrared spectroscopy(FT-IR). Results indicated that the xylan content was significantly decreased after LHWP, while the contents of glucan and lignin increasing accordingly. LHWP improved the enzymatic digestibility of the bamboo chips feedstock, and the enzymatic hydrolysis yield reached the maximum of 79.0%(glucan) and 92.0%(xylan) at a pretreatment intensity coefficiency of 4.50. However, the XOS concentration reached the maximum value(8.7 g/L)at an intensity coefficiency of 3.96(relative mass percentage of 55.3%), and decreased thereafter as the pretreatment strength was further increased. Finally only 0.5 g/L(relative mass percentage of 3.1%)XOS was obtained in the pretreatment prehydrolysate at an intensity coefficiency of 4.50.

Key words: liquid hot water pretreatment, bambaoo, enzymatic hydrolysis, xylooligosaccharides

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