Denitrifying bacterium and application thereof

Abstract

The invention belongs to the field of microbial agents, and particularly relates to a denitrifying bacterium and application thereof in sewage treatment, especially in denitrifying biofilter reinforcement. A strain of the denitrifying bacterium was deposited in CGMCC on September 18, 2017 with the preservation number of CGMCC No. 14620. The application comprises the following steps: preparing an enhanced bacterial liquid; adding distributed water or sewage into a filter tank, and smoldering; draining the distributed water or the sewage, and adding the sewage into the filter tank; stopping theaddition of the sewage, adding the enhanced bacterial liquid into the filter tank, mixing after standing still, and continually adding the sewage. By adopting the method provided by the invention, thestart-up time of a denitrifying biofilter can be greatly shortened, nitrate nitrogen in water can be completely degraded, and the treated water can reach the first-class A standard of a urban sewagetreatment plant; the denitrifying bacterium is wide in application range, good in temperature tolerance and pH tolerance and low in demand for carbon sources, greatly reduces the application costs, and has a great promotional value.

Description

Technical field [0001] The invention belongs to the field of microbial agents, and specifically relates to a denitrifying bacterium and its application, especially its application in a denitrifying filter. Background technique [0002] The secondary effluent of municipal sewage treatment plants often contains a certain concentration of nitrogen, which cannot be effectively treated, resulting in the effluent cannot be directly used in many occasions; therefore, the advanced treatment and reuse of urban sewage is to reduce the pollution load of water bodies and solve the shortage of water resources. Important strategies and necessary approaches. Common advanced treatment processes can be divided into three categories: coagulation sedimentation technology, membrane treatment technology and biological filter technology. [0003] Coagulation sedimentation technology uses a coagulant to coagulate suspended particulates and colloidal substances in water to form flocs, and then remove the...

AI Technical Summary

Problems solved by technology

However, the existing research still focuses on the improvement of its process, parameters, filter materials, etc., and has not carried out intensive improvement from its fundamental principle, that is, the denitrification organism itself.

[0006] In short, there are problems such as secondary pollution in coagulation and sedimentation technology, and problems such as high cost, membrane fouling and damage in membrane treatment technology

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