Grasas y Aceites, Vol 58, No 4 (2007)

The biodegradation of Olive Oil Mill Wastewaters by Sawdust and by a Phanerochaetae chrysosporium


https://doi.org/10.3989/gya.2007.v58.i4.448

M. Mebirouk
Ecole Mohammadia d’Ingénieurs (E.M.I), Département Génie Minéral, Laboratoire de Biorémédiation, Morocco

L. Sbai
Ecole Mohammadia d’Ingénieurs (E.M.I), Département Génie Minéral, Laboratoire de Biorémédiation, Morocco

M. Lopez
Universidad de Granada, Facultad de Farmacia, Departemento de Nutricion y Bromatologia, Spain

J. Gonzalez
Universidad de Granada, Instituto de Agua, Spain

Abstract


This paper discusses decolorization and chemical oxygen demand (COD) abatement in olive mill wastewaters (OMW) by Phanerochaetae chrysosporium grown in static, stirred and immobilized cultures. When P. Chrysosporium is used in cultures, no decolorization of crude OMW is observed. Decolorization occurs only after the removal of polyphenols by adsorption in sawdust, which allows a 39% polyphenol removal. The use of a High lignin peroxides (Lip) producing medium, yields the highest OMW decolorization and COD removal efficiencies. The use of P. Chrysosporium immobilized on polyurethane foam leads to significant abatements of OMW polluting characteristics. And COD abatement reached 70%. The reduction of polyphenols reached its highest level at 62%. A significant effluent decolorization is apparent.

Keywords


Biodegradation; Decolorization; Olive mill wastewaters; Polyphenols; Sawdust

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