Journal
FEMS MICROBIOLOGY LETTERS
Volume 223, Issue 2, Pages 215-219Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0378-1097(03)00380-X
Keywords
aerobic biotreatment; calcium alginate immobilization; olive mill wastewater; phenolic compounds; Candidu tropicalis
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During olive oil production, large quantities of olive mill wastewater (OMW) are produced. This wastewater material, containing a high level of phenolic compounds, poses a serious environmental problem in almost all Mediterranean countries. Candida tropicalis YMECl4 was used as an extremophile strain to design an aerobic biotreatment process to detoxify OMW and reduce its polluting organic load. The process was enhanced by directing yeast metabolism towards biodegradation pathways using hexadecane as co-metabolite and by immobilizing yeast cells in calcium alginate beads. Under immobilization conditions, C tropicalis YMECl4 grown at 40 C in OMW supplemented with hexadecane resulted in 69.7%, 69.2% and 55.3% reduction of chemical oxygen demand, monophenols and polyphenols, respectively, after a 24-h fermentation cycle. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
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