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低温喹啉降解菌的筛选及降解性能

Keywords: 低温,筛选,喹啉,降解性能

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Abstract:

从吉林石化污水处理厂的活性污泥中驯化、筛选获得一株降解效率高且生长速率快高效耐冷菌,命名为WS-5。该菌能以喹啉作为惟一的碳源、氮源及能源。结合菌体的形态观察、生理生化特性实验及16SrDNA序列同源性对比分析,鉴定菌株WS-5为恶臭假单胞菌(Pseudomonasputida)。不同降解条件下的实验结果表明,菌株WS-5的最佳降解条件是投菌量为15%,pH值范围在8~10,摇床转速为100r/min。最佳降解环境下对200mg/L的喹啉在132h降解率达到了85.3%。菌株WS-5对初始喹啉浓度为50、100、200和300mg/L的初始喹啉浓度分别在36、72、192和262h内完全降解。这将为今后在低温条件下处理含喹啉废水提供技术指导。

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