预处理对玉米秸秆纤维筛分及酶解性能的影响

Effect of Pretreatment on the Amount and Enzymatic Hydrolysis of Sieving Fractions of Corn Stalk

中文关键词:  预处理  玉米秸秆  筛分  化学成分  纤维素酶解

Key Words:pretreatment  corn stalk  sieving  chemical component  enzymatic hydrolysis

中文摘要:

      分别采用热水和NaOH对玉米秸秆进行预处理，并对预处理后玉米秸秆进行筛分。研究了两种预处理方法对玉米秸秆不同筛分组分及其化学成分的影响，并对不同筛分组分的纤维素酶解性能进行了研究。结果表明，与热水预处理相比，NaOH预处理玉米秸秆的细小纤维含量和纤维素酶解转化率更高。不同筛分组分的化学成分和酶解性能有一定差异，细小纤维的纤维素酶解效率更高。

Abstract:

      Corn stalks were pretreated with hot water and NaOH respectively， and subsequently fractionated to five fractions， which were designated as R1， R2， R3， R4 and R5 respectively， with descending order in terms of fiber length by Bauer fiber classifier．Effect of pretreatment on the amounts and chemical compositions of different sieving fractions，and their enzymatic digestibility were investigated.The results showed that compared with the pretreatment with hot water， the amount of fine fractions were larger， and cellulose conversion rate was higher during enzymatic hydrolysis when corn stalks were pretreated with NaOH． It was found that chemical components and enzymatic digestibility of different sieving fractions were different， the fine fractions were easier to be hydrolyzed by cellulase enzyme．