Valorisation of waste fractions from autohydrolysis of selected lignocellulosic materials

被引：58

作者：

Garrote, G ^{[1
]}

Cruz, JM ^{[1
]}

Domínguez, H ^{[1
]}

Parajó, JC ^{[1
]}

机构：

[1] Univ Vigo, Dept Enxeneria Quim, Orense 32004, Spain

来源：

JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY | 2003年 / 78卷 / 04期

基金：

欧盟地平线“2020”;

关键词：

Eucalyptus wood; corncob; autohydrolysis; ethyl acetate extracts; antioxidant activity;

D O I：

10.1002/jctb.760

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Non-isothermal processing of lignocellulosic materials in aqueous media (autohydrolysis reaction) under mild conditions leads to solutions containing valuable chemicals (oligosaccharides, sugars and acetic acid) and other, undesired, compounds (belonging to the extractive and acid-soluble lignin fractions) which have to be removed in further purification treatments. Liquors obtained by non-isothermal autohydrolysis of Eucalyptus globulus wood and corncobs under a variety of operational conditions were extracted with ethyl acetate in order to remove non-saccharide components, and the suitability of the fraction dissolved in the organic phase was assayed for possible utilisation as an antioxidant. The yield and antioxidant activity of ethyl acetate extracts (measured by the alpha,alpha-diphenyl-beta-picrylhydrazyl (DPPH) radical scavenging capacity) showed a strong dependence on the autohydrolysis conditions. The antioxidant activity of extracts obtained under selected operational conditions compared well with synthetic antioxidants. (C) 2003 Society of Chemical Industry.

引用

页码：392 / 398

页数：7

共 38 条

[1] PHENOMENOLOGICAL KINETICS OF COMPLEX-SYSTEMS - THE DEVELOPMENT OF A GENERALIZED SEVERITY PARAMETER AND ITS APPLICATION TO LIGNOCELLULOSICS FRACTIONATION [J].