Method and device for treating high concentration nitrogen waste water by using microorganism

Abstract

The invention relates to a method of treating highly concentrated nitrogen wastewater with microorganism and a device to carry out the method. The method comprises the following steps that: wastewater passes an anaerobic pool, a facultative tank, an aerobic pool and a sedimentation pool in sequence for biochemical treatment, and is characterized in that the anaerobic pool, the facultative tank and the aerobic pool are not added with fillings, sludge in the sedimentation pool reflows to the anaerobic pool, the facultative tank and the aerobic pool through a sludge reflowing pipe. The device comprises the aerobic pool, the facultative tank, the anaerobic pool and the sedimentation pool, a nitration liquid reflowing pipe is arranged between the sedimentation pool and the facultative tank, and is characterized in that the aerobic pool, the facultative tank and the aerobic pool are not added with fillings and sludge reflowing pipes are arranged between the sedimentation pool and the anaerobic pool, the facultative tank and the aerobic pool respectively. The method is simple in procedures, unnecessary to be added with fillings, thereby saving cost, and has better effluent effect and denitrogenation effect superior to the prior A< 2 > / O technology, and the bacteria quantity for nitration reaction in the aerobic pool are always kept at a higher degree.

Description

technical field [0001] The invention belongs to the technical field of using microorganisms to treat wastewater, in particular to a method and a device for using microorganisms to treat high-concentration nitrogen wastewater. Background technique [0002] The types of industrial wastewater are different, and the forms of nitrogen compounds contained in them are also different. In most cases, it exists in the form of inorganic nitrogen (mostly ammonia nitrogen). In addition, most of the organic nitrogen can be converted into the form of inorganic nitrogen during biological treatment. . The concentration and form of organic nitrogen or ammonia nitrogen in industrial wastewater depends on several factors, such as the nature of raw materials, the production technology used, water consumption and water reuse, etc. There are many ways to remove ammonia nitrogen from industrial wastewater. At present, the AAO process is widely used in wastewater treatment, that is, AAO process. ...

AI Technical Summary

Problems solved by technology

[0005] What the present invention will solve is that high-concentration nitrogen wastewater treatment adopts A 2 The removal effect of ammonia nitrogen by / O process is not good, and the sludge is only returned to the facultative tank, resulting in contradictory reaction conditions between nitrifying bacteria and denitrifying bacteria, short sludge age, low efficiency, high operating costs, and inconvenient control of technical problems in management and operation

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