木糖氧化无色杆菌及混合菌群对多环芳烃的降解特性

采用木糖氧化无色杆菌及混合菌降解水中多环芳烃。考察了木糖氧化无色杆菌的降解广谱性及其对多环芳烃混合底物的降解,特别考察了混合菌对具有弱致癌性的■(Chrysene)的降解特性。结果表明,木糖氧化无色杆菌具有较宽的降解谱,对多环芳烃混合底物具有良好降解特性。当蒽、菲、芘和■4种PAHs共存时,木糖氧化无色杆菌对蒽、菲、芘和■的降解效率分别达83%、66%、85%和80%。与单一木糖氧化无色杆菌相比,混合菌对的降解效率较高。尖镰孢菌与木糖氧化无色杆菌、茄镰孢菌与木糖氧化无色杆菌和3株菌同时共存时,■的降解效率分别达87%、88%和86%。

Degradation characteristics of polycyclic aromatic hydrocarbons by Achromobacter xylosoxidans and different strains mixtures

The chrysene degrading strains Achromobacter xylosoxidans and mixtures of Fusarium oxysporum, Fusarium solani and Achromobacter xylosoxidans were used to degrade PAHs in water. The broad spectrum degradation characteristics of Achromobacter xylosoxidans and the degradation of PAHs mixtures by the strains were investigated. The degradation characteristic of carcinogenic chrysene by different strains mixtures was also inspected. The results show that Achromobacter xylosoxidans has broad spectrum degradation characteristics, which the PAHs mixtures can be degraded. The removal rate of anthracene, phenanthrene, pyrene and chrysene can reach 83%, 66%, 85% and 80%, respectively, when the four PAHs coexisted in the culture medium solutions. The removal rate of chrysene by strains admixture is more than that by sole strain Achromobacter xylosoxidans. The removal rate of chrysene reach 87%, 88% and 86%, respectively, when Fusarium oxysporum and Achromobacter xylosoxidans coexisted, Fusarium solani and Achromobacter xylosoxidans coexisted, and the three strains coexisted.