`不同预处理方式对玉米叶和玉米秆酶解率的影响

CIESC Journal

• BIOTECHNOLOGY & BIOENGINEERING • 上一篇下一篇

`不同预处理方式对玉米叶和玉米秆酶解率的影响

苏东海^a; 孙君社^a; 刘萍^a; 吕燕萍^b

^a College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
^b Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-12-28 发布日期:2006-12-28
通讯作者: 苏东海

Effects of different pretreatment modes on the enzymatic digestibility of corn leaf and corn stalk

SU Donghai^a; SUN Junshe^a; LIU Ping^a; LÜ Yanping^b

^a College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
^b Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA

Received:1900-01-01 Revised:1900-01-01 Online:2006-12-28 Published:2006-12-28
Contact: SU Donghai

摘要/Abstract

摘要： Corn leaf and corn stalk were pretreated with only hot water and 0.1% sulfuric acid at 160℃ or 200℃，respectively. For hot water pretreatment, the pH of corn stalk hydrolysate decreased more rapidly than that of corn leaf as the reaction time increased. On the contrary, the pH of corn leaf hydrolysate increased more than that of corn stalk with diluted acid addition. Increasing temperature enhanced the xylose dissolution rate and increased cellulose digestibility. Compared with hot water, 0.1% sulfuric acid addition improved the xylan removal and the enzymatic hydrolysis of both corn leaf and corn stalk residue. Much less xylan must be removed to achieve the same cellulose digestibility for the corn leaf as that for the corn stalk; 55% digestibility was obtained when only 32% xylan was removed from corn leaf, whereas corn stalk required removal of about 50% of the xylan to achieve the same di-gestibility. Overall, the descending order of enzymatic digestibility was: dilute acid hydrolysate of corn leaf > dilute acid hydrolysate of corn stalk > water-only hydrolysate of corn leaf > water-only hydrolysate of corn stalk. Finally, one separate pretreatment strategy was developed to transfer corn leaf and corn stalk to fermentable sugars for fur-ther bioenergy production.

关键词: pretreatment;corn leaf;corn stalk;xylan removal;enzymatic digestibility

Abstract: Corn leaf and corn stalk were pretreated with only hot water and 0.1% sulfuric acid at 160℃ or 200℃，respectively. For hot water pretreatment, the pH of corn stalk hydrolysate decreased more rapidly than that of corn leaf as the reaction time increased. On the contrary, the pH of corn leaf hydrolysate increased more than that of corn stalk with diluted acid addition. Increasing temperature enhanced the xylose dissolution rate and increased cellulose digestibility. Compared with hot water, 0.1% sulfuric acid addition improved the xylan removal and the enzymatic hydrolysis of both corn leaf and corn stalk residue. Much less xylan must be removed to achieve the same cellulose digestibility for the corn leaf as that for the corn stalk; 55% digestibility was obtained when only 32% xylan was removed from corn leaf, whereas corn stalk required removal of about 50% of the xylan to achieve the same di-gestibility. Overall, the descending order of enzymatic digestibility was: dilute acid hydrolysate of corn leaf > dilute acid hydrolysate of corn stalk > water-only hydrolysate of corn leaf > water-only hydrolysate of corn stalk. Finally, one separate pretreatment strategy was developed to transfer corn leaf and corn stalk to fermentable sugars for fur-ther bioenergy production.

Key words: pretreatment, corn leaf, corn stalk, xylan removal, enzymatic digestibility

苏东海, 孙君社, 刘萍, 吕燕萍. `不同预处理方式对玉米叶和玉米秆酶解率的影响[J]. CIESC Journal.

SU ,Donghai, SUN ,Junshe, LIU ,Ping, LÜ, ,Yanping. Effects of different pretreatment modes on the enzymatic digestibility of corn leaf and corn stalk[J]. .

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`不同预处理方式对玉米叶和玉米秆酶解率的影响

Effects of different pretreatment modes on the enzymatic digestibility of corn leaf and corn stalk

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