金属硫酸盐预处理增强小麦秸秆的酶解糖化特性  

Improving the Enzymatic Saccharification of the Wheat Straw Via a Pretreatment Using Metal Sulfates

作　　者：徐双 王凯晴 霍丹[1] 付方伟 杨秋林[1,2] 张凤山 XU Shuang;WANG Kaiqing;HUO Dan;FU Fangwei;YANG Qiulin;ZHANG Fengshan(China Light Industry Key Laboratory of Papermaking and Biorefinery,Tianjin Key Laboratory of Pulp and Paper,College of Light Industry Science and Engineering,Tianjin University of Science&Technology,Tianjin 300457,China;Shandong Huatai Paper Co.,Ltd.,Huatai Group,Dongying 257335,China)

机构地区：[1]中国轻工业造纸与生物质精炼重点实验室,天津市制浆造纸重点实验室,天津科技大学轻工科学与工程学院,天津300457 [2]华泰集团华泰纸业有限公司,东营257335

出　　处：《天津造纸》2020年第4期20-24,共5页Tianjin Paper Making

摘　　要：将不同类型的金属硫酸盐用于小麦秸秆预处理,探索其对木质纤维原料的降解及后续酶解糖化的影响机制。结果表明:金属硫酸盐预处理能够高效降解和溶出小麦秸秆中的半纤维素(聚戊糖)和酸溶木素,而纤维素和酸不溶木素的降解损失较小。经金属硫酸盐预处理后,固体基质中纤维素的酶解转化率显著提高,特别是采用Fe_2(SO_4)_3预处理时的纤维素酶解转化率高达88.3%。此外,金属硫酸盐中金属离子的化合价对其预处理效果和固体基质的酶解糖化有重要影响,其中三价金属硫酸盐的影响最强,一价金属硫酸盐的影响最弱。Several types of metal sulfates were used to pretreat wheat straw,and their effects on the degradation of the lignocellulosic materials and the influence mechanism of the followed enzymatic saccharification were ex-plored.The results showed that most of the hemicellulose(pentosan)and acid-soluble lignin in the wheat straw were degraded and dissolved into the pretreatment liquor,whereas the losses of cellulose and acid-insoluble lignin were at a low level.After the pretreatment,the enzymatic saccharification yield of the cellulose in solid substrates was hugely increased,especially for the pretreatment using Fe2(SO4)3,the enzymatic conversion yield of glucose was as high as 88.3%.Moreover,the valence of the metal ions in the sulfates had a significant influence on the pretreatment and enzymatic saccharification,the impact of trivalent sulfate was very strong,while the monovalent sulfate had a very weak effect.

关 键 词：金属硫酸盐 预处理 半纤维素 酶解糖化 

分 类 号：TK6[动力工程及工程热物理—生物能]