One strain of bacterium of reducing high density hexabasic chromium in alkaline medium and its cultivating method

An alkaline medium, high-concentration technology, applied in the direction of bacteria, etc., can solve problems such as chromium pollution, and achieve the effect of simple ingredients, strong adaptability, and easy large-scale cultivation
CN1834226AInactive Publication Date: 2006-09-20CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2006-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention provides a method for culture bacteria that can reduce high concentration Cr (VI) in basic medium. The bacteria are colorless Achromobacter sp. (CGMCC 1260) with a preservation name of Ch-1. this invention adopts nitrogen and carbon sources as the culture media, and culture at 25-25 deg.C, pH value of 7-11, and Cr (VI) concentration of 1-2000 mg / L. this invention can raise Cr (VI) reduction capacity to higher than 2g / L, and can be used in chemical plants or chromium salt treatment plants for large scale Cr (VI) reduction.
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Description

technical field

[0001] The present invention relates to a bacterium that reduces high-concentration hexavalent chromium in alkaline medium and its large-scale cultivation method, in particular to the biological treatment technology of alkaline chromium-containing waste water, chromium slag leachate and chromium slag from chromium salt factories and ferroalloy factories . Background technique

[0002] At present, more than 100,000 tons of chromium slag are discharged every year in the country, and the accumulated stock has exceeded 4 million tons. The piled up chromium slag not only occupies a large amount of land, but also seriously pollutes groundwater due to soluble hexavalent chromium. In 2003, several serious chromium slags Pollution accidents are caused by the alkaline leachate of chromium slag. Alkaline chromium-containing wastewater or leachate of chromium slag has high pH (about 11), high concentration of Cr(VI), and high salinity. At present, there is a lack of good...

Claims

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