Elimination and detoxification of softwood extractives by white-rot fungi

被引:41
作者
Dorado, J
Claassen, FW
van Beek, TA
Lenon, G
Wijnberg, JBPA
Sierra-Alvarez, R
机构
[1] Wageningen Univ Agr, Dept Environm Sci, Div Wool Sci, NL-6700 AH Wageningen, Netherlands
[2] Wageningen Univ, Organ Chem Lab, Phytochem Sect, NL-6708 HB Wageningen, Netherlands
[3] Ctr Tech Ind Papiers Cartons & Celluloses, F-38044 Grenoble 9, France
关键词
lipophilic wood extractives; pitch; Scots pine; white-rot fungi; wood degradation; toxicity; microtox; triglycerides; resin acids; sterols; fatty acids; biopulping;
D O I
10.1016/S0168-1656(00)00264-9
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
The ability of several white-rot fungal strains to remove and detoxify acetone extractives (pilch or resin) in Scots pine sapwood was investigated in stationary laboratory batch assays. Fungal pretreatment provided up to 62% total pitch reduction and significant decreases in pitch toxicity. The best strains were Bjerkandera sp, strain BOS55, Stereum hirsutum and Trametes versicolor that eliminated over 93% of the problematic triglyceride fraction and 58-87% of other lipophilic extractive classes in only 2 weeks. Fungal removal of the wood extractives was accompanied by a 7.4-16.9-fold decrease in their inhibitory effect, as determined in the Microtox bioassay. Wood pretreatment by Bjerkandera sp. and T. versicolor caused limited losses of woody mass (less than 4% in 4 weeks); whereas S. hirsutum led to somewhat higher mass losses (7% in 4 weeks). These results indicate the potential of white rot fungi to control pitch deposition problems in pulping and to reduce the aquatic toxicity caused by naturally-occurring lipophilic extractives in forest industry effluents. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:231 / 240
页数:10
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