Grasas y Aceites, Vol 46, No 6 (1995)

A biotechnological valorization and treatment of olive mill waste waters by selected yeast strains

M. Mouncif
Departement de Genie Industriel Alimentaire, Morocco

M. Faid
de Microbiologie Alimentaire et Biotechnologie. Institut Agronomique et Vétérinaire Hassan I Instituts Morocco, Morocco

A. Achkari-Begdouri
Departement de Genie Industriel Alimentaire, Morocco

R. Lhadi
Faculté des Sciences d'Eljadida, Rabat, Morocco


Olive mill waste waters were diluted to 1/10, supplied with 2% urea and inoculated with yeast strains. 20 yeast strains isolated from Olive Mill Waste (OMW) water were screened for their biomass production, GOD reduction and polyphenols bioconversión activities. Pure cultures of yeasts were realized in 100 ml erlen-meyer flasks. 50 ml cultures were used and the flasks were incubated at room temperature (22°G) on a shaker. Biomass production, COD (chemical oxygen demand) reduction and Polyphenols bioconversión were followed up in the inoculated OMW waters. Results showed that the urea supply improve significantly the biomass production relatively to the control. This reached in some assays 2.06% expressed as g of biomass dry weight per 100 mL of OMW water. Polyphenols removal was estimated to around 50% and the COD was decreased from 54.14 g/Kg to 21.56 g/Kg. This aerobic treatment lead to the biomass production and also to a pretreated efluent by the COD and the removal of the methanization inhibiting polyphenolic compounds.


Biomass; CO; Olive mill waste water; Polyphenol; Yeast

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Copyright (c) 1995 Consejo Superior de Investigaciones Científicas (CSIC)

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