THE EFFECT OF DELIGNIFICATION PROCESS WITH ALKALINE PEROXIDE ON LACTIC ACID PRODUCTION FROM FURFURAL RESIDUES

被引:0
作者
Tang, Yong [1 ]
Bu, Lingxi [1 ]
Deng, Lihong [1 ]
Zhu, Liwei [1 ]
Jiang, Jianxin [1 ]
机构
[1] Beijing Forestry Univ, Dept Chem Engn, Beijing 100083, Peoples R China
来源
BIORESOURCES | 2012年 / 7卷 / 04期
基金
美国国家科学基金会;
关键词
Lactic acid; Delignification; Furfural residue; Enzyme activity; Interaction; SIMULTANEOUS SACCHARIFICATION; FERMENTATIVE PRODUCTION; ENZYMATIC-HYDROLYSIS; SOFTWOOD; STEAM;
D O I
暂无
中图分类号
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号
0805 ; 080502 ; 0822 ;
摘要
Furfural residues produced from the furfural industry were investigated as a substrate for lactic acid production by simultaneous saccharification and fermentation (SSF). Alkaline peroxide was used for delignification of furfural residues to improve the final lactic acid concentration. The residue was treated with 1.3% to 1.7% hydrogen peroxide at 80 degrees C for 1 h with a substrate concentration of 3.33%. SSF of furfural residues with different delignification degrees were carried out to evaluate the effect of delignification degree on lactic acid production. Using corn hydrolysates/furfural residues as substrates, SSF with different media were carried out to investigate the effect of lignin on the interaction between enzymes and lactic acid bacteria. Lactic acid bacteria had a negative effect on cellulase, thus resulting in the reduction of enzyme activity. Lignin and nutrients slowed down the decreasing trend of enzyme activity. A higher delignification resulted in a slower fermentation rate and lower yield due to degradation products of lignin and the effect of lignin on the interaction between enzymes and lactic acid bacteria. For the purpose of lactic acid production, a moderate delignification (furfural residues with the lignin content of 14.8%) was optimum.
引用
收藏
页码:5211 / 5221
页数:11
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