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

✍ Scribed by Sami Sayadi; Radhouane Ellouz

• Publisher: Springer
• Year: 1992
• Tongue: English
• Weight: 522 KB
• Volume: 37
• Category: Article
• ISSN: 1432-0614
• DOI: 10.1007/bf00174851

✦ Synopsis

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 (7407o of colour removal, 80070 of chemical oxygen demand removal) when the cultures were supplemented with veratryl alcohol and flushed with 02. 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 de- colourization of OMW corresponds to depolymerization of high-molecular-mass aromatics combined with mineralization of a wide range of monoaromatic compounds.