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

Key words: 
• Achromobacter xylosoxidans /
• high efficiency flora /
• PAHs /
• diversity of degradable substrates /
• degradation characteristic

Abstract: 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.