Reduction of phenolics content and COD in olive oil mill wastewaters by indigenous yeasts and fungi

被引:32
作者
Aissam, Halah [1 ]
Penninckx, Michel J. [1 ]
Benlemlih, Mohamed [1 ]
机构
[1] Univ Libre Bruxelles, Ecole Interfac Bioingn, Lab Physiol & Ecol Microbiennes, Inst Pasteur, B-1180 Brussels, Belgium
关键词
Candida boidinii; Geotrichum candidum; Penicillium sp aspergillus niger; acclimation; olive oil mill wastewaters; phenolic compounds;
D O I
10.1007/s11274-007-9348-0
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Olive oil mill wastewaters (OOMW) cause a recurrent environmental pollution problem. The large concentration of phenolic compounds in the organic fraction of OOMW is principally responsible for the phytotoxicity and microbial growth inhibitory effects of the effluent. Candida boidinii, Geotrichum candidum, a Penicillium sp. and Aspergillus niger HA37 were isolated from OOMW. When cultivated directly on an undiluted OOMW-based medium containing 82 g 1(-1) COD, these strains removed only 4-8% of chemical oxygen demand (COD) and phenolics. In contrast, reduction values attaining respectively 40-73% for phenolics and 45-78% for COD removal in the undiluted OOMW-based medium were obtained when using the strains gradually acclimated to high concentration of OOMW by successive stepwise transfer from media containing COD of 20.5 up to 82 g 1-1. Possibly, a sufficient production level of degradation and/or detoxification enzymes has to be attained to overcome the toxic effects of the phenolic fraction of concentrated OOMW. The present investigation calls attention to the necessity of acclimation for certain fungal and yeasts strains potentially useful for treating highly polluted effluents.
引用
收藏
页码:1203 / 1208
页数:6
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