Treatment device and method for high ammonia-nitrogen wastewater

Abstract

The invention provides a treatment device and method for high ammonia-nitrogen wastewater. The treatment device comprises an adjustment pool, chemical feeding units, a tank, a first container, a second container, a first separating piece, a second separating piece and an aeration module, wherein the chemical feeding units are used for adjusting the PH value of the wastewater; an opening is formed in the upper portion of the tank; the first container is arranged in the tank and located in the second container, an opening is formed in the bottom of the first container, and a separating net is arranged in the opening; padding is arranged in the first container; wastewater output by the adjustment pool is sent into the first container; the second container is arranged in the tank, an opening is formed in the bottom of the second container, and a separating net is arranged in the opening; padding is arranged in the second container; wastewater output by the adjustment pool is sent into the second container; the first separating piece and the second separating piece are arranged in the portion, outside the second container, of the tank from top to bottom; the upper portion of the first separating piece is inclined, and the horizontal distance between the first separating piece and the inner wall of the tank is decreased from top to bottom; the top end of the second separating piece is lower than the first separating piece; the second separating piece is provided with an opening; and the aeration module is arranged under the second container. The treatment device and method for the high ammonia-nitrogen wastewater have the advantages of efficient operation, good application prospects and the like.

Description

technical field [0001] The invention relates to sewage treatment, in particular to a treatment device and method for high ammonia nitrogen sewage. Background technique [0002] A large amount of nitrogen accumulation in sewage can easily lead to serious deterioration of the water environment, such as eutrophication of rivers and lakes, so denitrification has become an indispensable and important link in sewage treatment. [0003] Such as figure 1 As shown, the traditional biological denitrification process is as follows: the pretreated sewage enters the anoxic tank, and completes the denitrification reaction in the anoxic tank together with the nitrification liquid that has undergone aerobic nitrification backflow to generate nitrogen, and the sedimentation tank returns sludge to the anoxic tank to maintain the sludge concentration in the anoxic tank; after the denitrification reaction, the sewage enters the aerobic tank for nitrification reaction to produce nitrate nitroge...

AI Technical Summary

Problems solved by technology

[0005] 1. The growth environment of microorganisms and bacteria in nitrification and denitrification is different, and they need to be cultivated and operated separately, and they need to be carried out in two pools separately, which increases the investment cost and operation difficulty;

[0006] 2. The growth rate of nitrifying bacteria is slow and it is difficult to maintain a high sludge concentration. A complete sludge return system is required, resulting in long hydraulic retention time of the system and low load. The volume of denitrification tank and nitrification tank increases, which increases investment. and operating costs;

[0007] 3. The nitrification process consumes a lot of oxygen, the power of the fan is large, and the operation consumes a lot of energy;

The cost of the added carbon source is high and the operation is troublesome, and when methanol is used as the carbon source, it is dangerous and the start-up speed of the denitrification microorganism is slow

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