Decolourization of olive mill waste-waters by the white-rot fungus Phanerochaete chrysosporium: involvement of the lignin-degrading system

The decolourization of olive mill waste-waters (OMW) by Phanerochaete chrysosporium was investigated. OMW decolourization occurred during the primary phase of growth when glycerol was used as the carbon source, and during secondary metabolism in nitrogen-limited cultures. The decolourization was fou...

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Bibliographic Details
Published in:Applied microbiology and biotechnology 1992-09, Vol.37 (6), p.813-817
Main Authors: Sayadi, S, Ellouz, R
Format: Article
Language:English
Subjects:
Biological and medical sciences
Biological treatment of waters
Biotechnology
decay fungi
degradation
Environment and pollution
Fundamental and applied biological sciences. Psychology
Industrial applications and implications. Economical aspects
lignification
lignin
Phanerochaete chrysosporium
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Summary:The decolourization of olive mill waste-waters (OMW) by Phanerochaete chrysosporium was investigated. OMW decolourization occurred during the primary phase of growth when glycerol was used as the carbon source, and during secondary metabolism in nitrogen-limited cultures. The decolourization was found to be extensive (74% of colour removal, 80% of chemical oxygen demand removal) when the cultures were supplemented with veratryl alcohol and flushed with O2. The biodegradation system was repressed with glutamate as a nitrogen source. These results suggest that all or part of the lignin-degrading system of P. chrysosporium played a role in biodegradation of OMW. The decolourization of OMW corresponds to depolymerization of high-molecular-mass aromatics combined with mineralization of a wide range of monoaromatic compounds.
ISSN:0175-7598
1432-0614
DOI:10.1007/BF00174851