O-xylene degradation bacterium and application thereof

A technology of o-xylene and degrading bacteria, which is applied in the field of bioaugmentation of environmental pollutants, can solve the problems of low degradation efficiency of o-xylene, achieve fast degradation speed, high tolerance concentration, and good removal effect
CN105087429AActive Publication Date: 2015-11-25WUHAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Publication Date
2015-11-25

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Abstract

The invention discloses an o-xylene degradation bacterium and application thereof. The o-xylene degradation bacterium OX5 provided by the invention belongs to pseudomonas sp., which is preserved in China Center for Type Culture Collection on June 29, 2015 with preservation number of CCTCC NO: M2015415. The bacterium is a Gram-negative bacterium that colony is round, slightly convex, milk white in space around while yellow in middle and is smooth and wet in surface. The bacterium can grow and reproduce by taking O-xylene as a unique carbon source; during pure culture, the degradation rate on 1500mg / L of O-xylene reaches up to 98% at 48th hour, and tolerance concentration to the O-xylene is 2500mg / L. The bacterium not only can degrade O-xylene and other benzene series in coking wastewater but also can reduce COD (chemical oxygen demand) in discharged coking biochemical water; and the bacterium is applicable to the biological enhancement treatment of cooking wastewater and is extensive in application prospect.
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Description

technical field

[0001] The invention belongs to the technical field of environmental pollutant bioaugmentation, and in particular relates to an o-xylene degrading bacterium and its application. Background technique

[0002] Ortho-xylene is an important organic chemical raw material, mainly used in the production of phthalic anhydride, dyes, pesticides, paint solvents and drugs, etc., of which about 90% is used to produce phthalic anhydride, 2% is used to produce solvents, and only 1% Used to produce dye intermediates. O-xylene is highly toxic, and can irritate the skin and mucous membranes at low concentrations, and can penetrate into the body through the skin; at high concentrations, it can anesthetize the central nervous system and make people unconscious. Long-term exposure can affect liver and kidney function and cause neurasthenia syndrome. Using physical and chemical methods to treat o-xylene can achieve good results, but the cost is high and it is easy to cause seco...

Claims

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