Moderate halophilic aromatic pollutant degrading bacteria and application thereof

Abstract

The invention discloses moderately halophilic bacteria capable of efficiently degrading multiple polycyclic aromatic hydrocarbons and application thereof, wherein the moderately halophilic bacteria are enriched and screened from polycyclic aromatic hydrocarbon contaminated saline alkali soil in Shengli Oil Field, are identified and named as Martelella sp.AD-3(CCTCC M2011218). The bacteria can efficiently degrade multiple pollutants such as biphenyl, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene and benzo[a]anthracene, and chrysene under the condition that the salinity is 0.5-15% and the pH value is 6-10. In 36h, degradation rate for fluorene with concentration of 100mg / L can reach 100%. The optimal degradation conditions of AD-3 bacteria are that pH is 9.0,salinity is 15g / kg, moisture content is 25%, and temperature 30 DEG C. Under the optimal conditions, AD-3 bacteria have an obvious removal effect for acenaphthylene, biphenyl, fluorene, phenanthreneand anthracene, and the removal rate for acenaphthylene and biphenyl can reach 100%.

Description

【Technical field】 [0001] The invention relates to the technical field of strains, in particular to a moderately halophilic polycyclic aromatic hydrocarbon degrading bacterium and its application. 【Background technique】 [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) refer to hydrocarbons composed of two or more benzene rings arranged in a linear, angular, or clustered form, which are mainly derived from the incomplete combustion of fossil fuels and the production of petroleum products. Natural processes such as forest fires and volcanic eruptions also emit PAHs, and they can gradually accumulate in the environment. Most PAHs have conjugated double bond π electrons, which can absorb ultraviolet light and emit fluorescence. With the role of environmental hormones. Therefore, the distribution of PAHs in the environment and their potential threats to human health have attracted great attention from all over the world. Many countries list a r...

AI Technical Summary

Problems solved by technology

At present, it has been reported that many bacteria, fungi, and algae have the ability to degrade PAHs, but studies have found that the removal of PAHs is poor when the non-halophilic PAHs-degrading microorganisms are introduced into high-salt environments. Degradation of PAHs in high-salt environment may be an effective way, which has attracted much attention in recent years

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