EFFECT OF STREPTOMYCES-VIRIDOSPORUS T7A ON KRAFT LIGNIN
No Thumbnail Available
Date
1990
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
The ability of the lignino-cellulolytic actinomycete Streptomyces virdosprous T7A to attack purified fractions of kraft lignin was examined. In the presence of 0.3% yeast extract, high-molecular weight kraft lignin (MW > 3000, ether-insoluble fraction) does not affect growth of this microorganism significantly, whereas low-molecular weight kraft lignin (MW < 3000, ether-soluble fraction) inhibits its development. Accordingly, average molecular weight of the ether-insoluble fraction after bacterial growth remained unaltered, as measured by Sephadex G-50 gel permeation chromatography. Slight modifications were detected by high performance liquid chromatography in the ether-soluble fraction after incubation with the microorganism. S. viridosporus T7A partially decolorized Remazol Brilliant Blu R during growth on wheat lignocellulose. However, decolorization of either fraction of kraft lignin was not observed. These results suggest that the filamentous bacterium S. viridosporous T7A is not suitable for pulp mill effluent treatment.