造纸废弃物麦草废渣高温自水解预处理对酶水解性能的影响

doi:10.3969/j.issn.0253-2417.2015.03.016

Abstract

Abstract: Wheat straw from papermaking waste was pretreated by hot-compressed water. The test of enzymatic hydrolysis and its compositions was studied.The effects of pretreatment conditions on waste wheat straw were investigated,and the enzymatic hydrolysis yields of cellulose and xylan were examined. Results showed that chemical composition of waste wheat straw and physical structures were changed after pretreatment,and the cellulose contents and surfaces increased.This promoted the enzymatic hydrolysis of cellulose.Enzymatic hydrolysis results showed that the temperature of pretreatment had a very significant impact on the yield.Waste wheat straw pretreated at 200 ℃ for 60min was used as the enzyme hydrolysis substrate at a concentration of 50 g/L.Under the conditions of cellulose enzyme 35 FPIU/g (of cellulose), β-glucose glycosides enzyme 25 IU/g,xylanase enzyme 120 U/g,PEG6000 2 g/L,enzymatic hydrolysis temperature 50 ℃, and reaction time 36 h,the hydrolysis yield of cellulose and xylan reached 86.29% and 74.03%,respectively.They improved 2.3 times and 2.8 times of those pretreated by 170 ℃ for 40 min.

Key words: waste wheat straw, hot-compressed water, pretreatment, enzymatic hydrolysis

CLC Number:

TQ35

HUANG Ping, ZHU Yuan-yuan, XU Yong, YONG Qiang, HUANG Li-xin, YU Shi-yuan. Effects of Hot-compressed Water on the Enzymatic Hydrolyzability of Papermaking Waste Wheat Straw[J]. Chemistry and Industry of Forest Products, 2015, 35(3): 91-96.

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Effects of Hot-compressed Water on the Enzymatic Hydrolyzability of Papermaking Waste Wheat Straw

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