NDLI: Detoxification of olive mill wastewaters by Moroccan yeast isolates

Content Provider	Springer Nature Link
Author	Ben Sassi, A. Ouazzani, N. Walker, G. M. Ibnsouda, S. El Mzibri, M. Boussaid, A.
Copyright Year	2007
Abstract	A total of 105 yeast strains were isolated from Moroccan olive oil production plants and evaluated for their ability to grow in olive oil mill wastewaters (OMW). The 9 isolates that grew best on OMW were selected for further study to evaluate their effect on removal of organic pollutants and OMW phytotoxicity (barley seed germination test). The results showed that at least four yeast isolates effectively lowered the toxicity of this effluent in addition to providing very useful materials in terms of both yeast biomass (6 g/l DW) and an irrigation fluid. This group of yeast isolates significantly reduced the concentration of total phenols (44% removal) and Chemical Oxygen Demand, COD (63% removal). The best germination rate of 80% for undiluted OMW was obtained for strain Candida holstii that also increased the pH from 4.76 to 6.75. Principal component analysis of the results obtained for the best yeast strains confirmed the importance of COD and total phenol reduction along with increase of organic nitrogen and final pH for the improvement of germination rates and phytotoxic reduction. This study has highlighted the potential of indigenous yeasts in detoxification of olive mill wastewaters.
Starting Page	337
Ending Page	346
Page Count	10
File Format	PDF
ISSN	09239820
Journal	Biodegradation
Volume Number	19
Issue Number	3
e-ISSN	15729729
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-11-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carbohydrate assimilation COD Detoxification Germination assays Olive oil mill wastewaters Total phenols Yeasts Waste Management/Waste Technology Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Terrestrial Pollution Geochemistry Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology

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