Comparative Study of Olive Oil Mill Wastewater Treatment Using Free and Immobilized Coriolopsis polyzona and Pycnoporus coccineus

Mohamed Neifar; Atef Jaouani; María Jesús Martínez; Michel J. Penninckx

doi:10.1007/s12275-012-2079-4

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Comparative Study of Olive Oil Mill Wastewater Treatment Using Free and Immobilized Coriolopsis polyzona and Pycnoporus coccineus: Mohamed Neifar ¹, Atef Jaouani ¹, María Jesús Martínez ², Michel J. Penninckx ³; Journal of Microbiology 2012;50(5):746-753.
DOI: https://doi.org/10.1007/s12275-012-2079-4
Published online: November 4, 2012

¹Laboratoire Microorganismes et Biomolécules Actives, Faculté des Sciences de Tunis, Campus Universitaire, 2092, Tunis, Tunisia, ²Centro de Investigaciones Biológicas, Department of Microbiologia Molecular, CSIC, Ramiro de Maeztu 9, 28040 Madrid, Espagne, ³Laboratoire de Physiologie et Ecologie Microbiennes, Université Libre de Bruxelles, C⁄O Institut Pasteur, Bruxelles, Belgium

Corresponding author: Atef Jaouani , Tel: +216-70-860-553,

Received: 13 February 2012 • Accepted: 14 June 2012

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Abstract

The efficiency of the two white-rot fungi Pycnoporus coccineus and Coriolopsis polyzona in the Olive Oil Mill Wastewater (OOMW) treatment was investigated. Both fungi were active in the decolourisation and COD removal of OOMW at 50 g/L COD, but only the first fungus remains effective on the crude effluent (COD=100 g/L). Moreover P. coccineus was less affected by oxygen supplementation and exhibited a high tolerance to agitation in comparison to C. polyzona. However, it required a nitrogen supplementation to obtain faster and higher COD removal. To overcome the negative effect of agitation on fungi growth and efficiency, immobilisation of C. polyzona and P. coccineus in polyurethane foam was applied. The immobilized system showed better COD decreases during three consecutive batches without remarkable loss of performances. The results obtained in this study suggested that immobilized C. polyzona and especially immobilized P. coccineus might be applicable to a large scale for the removal colour and COD of OOMW.

Keywords: olive oil mill wastewater;biodegradation;Coriolopsis polyzona;Pycnoporus coccineus;cell immobilization

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Comparative Study of Olive Oil Mill Wastewater Treatment Using Free and Immobilized Coriolopsis polyzona and Pycnoporus coccineus

J. Microbiol. 2012;50(5):746-753. Published online November 4, 2012

DOI: https://doi.org/10.1007/s12275-012-2079-4

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