Abstract
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 supplement d 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.
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