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Decolorization of olive oil mill wastewaters by Phanerochaete flavido‐alba
Author(s) -
Hamman Omar Ben,
de la Rubia Teresa,
Martínez José
Publication year - 1999
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620181105
Subject(s) - phanerochaete , chemistry , wastewater , pulp and paper industry , olive oil , lignin , bioremediation , peroxidase , manganese peroxidase , extraction (chemistry) , mycelium , chrysosporium , food science , chromatography , environmental chemistry , botany , contamination , biology , enzyme , biochemistry , organic chemistry , environmental engineering , environmental science , ecology , engineering
Olive oil mill wastewater (OMW), a major waste product of olive oil extraction, contains many recalcitrant compounds, mainly present in the colored fraction. In this study we attempted to identify optimum culture conditions for the decolorization of OMW by Phanerochaete flavido‐alba for subsequent use in bioremediation assays. Of several media tested, nitrogen‐limited P. flavido‐alba cultures containing 40 mg/L Mn(II) were the most efficient at decolorizing OMW. Decolorization was accompanied by a 90% decrease in the OMW phenolic content. Concentrated extracellular fluids alone (showing manganese peroxidase, but not lignin peroxidase activity) did not decolorize the major OMW pigment, suggesting that mycelium binding forms part of the decolorization process.