A kind of streptomyces and its application for removing hexavalent chromium pollution

Abstract

The invention discloses a Streptomyces puniceus strain.LYzhlm that efficiently removes hexavalent chromium pollution. The strain was preserved in the General Microorganism Center of China Microbiological Culture Collection Management Committee on December 2, 2015, and the preservation number is CGMCC No. 11773, named Streptomyces puniceus strain.LYzhlm. Beneficial effects of the present invention: it has strong hexavalent chromium removal performance, and can reduce hexavalent chromium ions with a concentration of 100 mg / L to 1000 mg / L to 0 under the condition of aerobic and medium temperature, and the reduction rate is 100%. .

Description

technical field [0001] The invention relates to the technical field of microbes, in particular to a streptomycete for removing hexavalent chromium pollution. Background technique [0002] With the rapid development of society and economy, chromium has been widely used in industry, but at the same time it has brought a lot of pollution to the environment. In industry, chromium is widely used in electroplating, wood preservation, leather manufacturing, steel and other industries, and is finally discharged into the environment in the form of waste water and waste residue. According to the data of the Ministry of Environmental Protection, at present, the area of ​​cultivated land polluted by heavy metals such as chromium in my country is nearly 20 million hectares, accounting for about 1 / 5 of the total area of ​​cultivated land. Every year, more than 10 million tons of grain are reduced due to heavy metal pollution across the country. Although chromium is an essential trace el...

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Problems solved by technology

[0003] At present, the chemical reduction method is a common method for remediating chromium pollution, but there are problems such as poor treatment effect, high cost, high energy consumption, and secondary pollution.

Traditional chromium pollution treatment methods include alkali precipitation, membrane separation, ion exchange and adsorption, etc. The former will produce a large amount of sludge during the treatment process, while the latter two are limited due to high treatment costs. Because each method has defects, An effective comprehensive utilization method has not yet been found

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