Summary
By contaminating a Tunisian soil with black oxidized and sterilized olive-mill wastewaters (OMW), 30 new indigenous fungal soil strains able to overcome the OMW toxicity could be directly selected. Ten of the fungal strains previously isolated were screened for their capability to grow in a liquid culture medium containing oxidized OMW as the only source of carbon and energy. According to these preliminary tests, strain F2 showed the best capability of removing black colour and COD (chemical oxygen demand) and was further identified as Aspergillus flavus. After optimization of batch-liquid culture conditions in the presence of oxidized OMW, the time course of biomass and enzyme production by A. flavus F2 was followed in relation to colour and COD removal. A. flavus F2 could efficiently decolourize and detoxify the black oxidized OMW (58 and 46% of colour and COD removal, respectively, after 6 days of cultivation), concomitantly with the production of tannase (8000 UI/l on day 3).
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Kachouri, S., Halaouli, S., Lomascolo, A. et al. Decolourization of Black Oxidized Olive-Mill Wastewater by a New Tannase-Producing Aspergillus flavus Strain Isolated from Soil. World J Microbiol Biotechnol 21, 1465–1470 (2005). https://doi.org/10.1007/s11274-005-6810-8
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DOI: https://doi.org/10.1007/s11274-005-6810-8