A two-stage combined reaction tank for removing ammonia nitrogen in water and a sewage treatment method

Abstract

The invention discloses a two-section combined reaction tank for removing ammonia nitrogen in water. The two-section combined reaction tank comprises a first reaction tank section and a second reaction tank section. The bottom of each reaction tank section is provided with an aeration head and inoculated with sludge containing a nitrococcus bacterial colony and an anaerobic ammonium oxidation bacterial colony. The two-section combined reaction tank is characterized in that micro-aerobic aeration is performed in each reaction tank section so that a nitrosation process and an anaerobic ammonium oxidation process can be performed at the same time to convert ammonia nitrogen into nitrogen gas. A method comprises the steps of a, sludge inoculation; b, intermittent water input; c, intermittent aeration; d, a nitrosation reaction; e, an anaerobic ammonium oxidation reaction. According to the reaction tank and the treatment method, the nitrosation reaction and the anaerobic ammonium oxidation reaction are performed in the two reaction tank sections at the same time, and the treatment effect is improved by means of two-section treatment. Through arrangement of an S-shaped pipe, the defect that the sludge is prone to loss through a former anaerobic ammonium oxidation reactor is overcome, and it is ensured that the sludge has highest activity. A settling pond and a sludge return auxiliary process and equipment are omitted, the structure is simple, and operation is convenient.

Description

Technical field [0001] The invention relates to a two-stage combined reaction tank for removing ammonia nitrogen in water and a sewage treatment method, and more specifically, to a method for simultaneously realizing nitrosation and anaerobic ammonia oxidation through micro-oxygen aeration in a reaction tank Two-stage reaction tank and sewage treatment method are used to remove nitrogen pollutants in sewage. Background technique [0002] With the improvement of my country's economic and living standards, the amount of water used by residents continues to increase, and the amount of sewage produced is also increasing year by year, especially the nitrogen pollutants in it, which bring a great burden to the operation of sewage plants. The removal of nitrogen pollutants in wastewater treatment plants traditionally relies on the mainstream denitrification process. Not only is the process complicated, it also requires a large amount of carbon to be added, and the operating cost is high...

AI Technical Summary

Problems solved by technology

However, the two treatment methods have great disadvantages: the former requires about 40% nitrosation, which is extremely difficult to control accurately; the latter is based on the type or structure of the reactor of the traditional treatment device, and there are many problems in actual operation , such as sludge loss, complex equipment, etc.

In addition, the treatment of industrial nitrogen-containing wastewater mostly uses membrane treatment, which is extremely expensive and has become a major burden on economic development.

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