伊朗某石化废水处理厂的生物降解潜力和细菌多样性
Biodegradation potential and bacterial diversity of a petrochemical wastewater treatment plant in Iran.
作者信息
Shokrollahzadeh S, Azizmohseni F, Golmohammad F, Shokouhi H, Khademhaghighat F
机构信息
Institute of Chemical Technologies, Iranian Research Organization for Science and Technology, No. 71, Forsat Street, Enghelab Avenue, P.O. Box 15815-3538, Tehran, Iran.
出版信息
Bioresour Technol. 2008 Sep;99(14):6127-33. doi: 10.1016/j.biortech.2007.12.034. Epub 2008 Feb 5.
An activated sludge treatment was evaluated for its effectiveness in cleaning up a petrochemical wastewater in Iran. For assessing biodegradation potential of activated sludge, seven characteristics of wastewater (temperature, pH, dissolved oxygen, chemical oxygen demand, concentrations of ethylene dichloride, vinyl chloride, and total hydrocarbons) were monitored during six months. It was shown that dominant pollutants in order of magnitude were normal-alkanes (C(10)-C(21)), aromatics, and polycyclic hydrocarbons. The activated sludge treatment revealed maximum reduction of 89%, 99%, 92%, and 80% in COD, ethylene dichloride, vinyl chloride and total hydrocarbons concentrations, respectively. Preliminary screening of culturable petrochemical-degrading microorganisms of the activated sludge resulted in the collection of 67 bacterial and one mold species. Bacterial strains mainly belonged to Pseudomonas, Flavobacterium, Comamonas, Cytophaga, Acidovorax, Sphingomonas, Bacillus and Acinetobacter genera. The isolated mold was identified as Trichoderma sp.
对伊朗一种活性污泥处理方法在净化石化废水方面的有效性进行了评估。为评估活性污泥的生物降解潜力，在六个月期间监测了废水的七个特征（温度、pH值、溶解氧、化学需氧量、二氯乙烷浓度、氯乙烯浓度和总烃浓度）。结果表明，按含量大小排序，主要污染物为正构烷烃（C(10)-C(21)）、芳烃和多环烃。活性污泥处理使化学需氧量、二氯乙烷、氯乙烯和总烃浓度分别最大降低了89%、99%、92%和80%。对活性污泥中可培养的石化降解微生物进行初步筛选，共收集到67种细菌和1种霉菌。细菌菌株主要属于假单胞菌属、黄杆菌属、丛毛单胞菌属、噬纤维菌属、嗜酸菌属、鞘氨醇单胞菌属、芽孢杆菌属和不动杆菌属。分离出的霉菌被鉴定为木霉属。
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