A method for removing low-concentration ammonia nitrogen in water by using ozone and trace amounts of calcium peroxide

Abstract

The invention discloses a method for removing low-concentration ammonia nitrogen in a water body by using ozone and a trace amount of calcium peroxide. The pure oxygen generator is built into the ozone generator, and the pure oxygen produced by the pure oxygen generator is used as the oxygen source of the ozone generator to produce ozone; the water body is passed into the aeration tank, which is prepared by the ozone generator. of the ozone. The trace calcium peroxide of the present invention can work synergistically with ozone to degrade the ammonia nitrogen in the water body in a short time, the removal rate can reach 99%, the treatment time can be as short as 15 minutes, and the water body will not be caused secondary pollution. Calcium peroxide The concentration can be as low as 0.001g / L. The method of the invention is safe and reliable, and the cost is extremely low. At the same time, the method can obviously reduce the odor of the black and odorous water body and obviously increase the dissolved oxygen content in the water body.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for removing low-concentration ammonia nitrogen in a water body by using ozone and a small amount of calcium peroxide. Background technique [0002] The use of chemical fertilizers, landfills, petrochemicals, coking, food and pharmaceutical industry wastewater, etc. all produce a large amount of low-concentration ammonia-nitrogen wastewater. The ammonia-nitrogen content in surface lake water is an important indicator for measuring eutrophication of water bodies and is also the main factor for black and odorous rivers. Low-concentration ammonia-nitrogen wastewater increases the difficulty and cost of water treatment, and at the same time affects the water quality of surface water bodies, causing toxic effects on people and organisms. In recent years, the impact of ammonia nitrogen wastewater on the environment has attracted global attention in...

AI Technical Summary

Problems solved by technology

Due to the relatively stable nature of ammonia nitrogen, small molecular weight and high solubility of physical and chemical properties, the removal efficiency of ammonia nitrogen in wastewater after these methods is not ideal after one-time treatment and cannot meet the wastewater discharge standards, and it needs to be combined with subsequent physical or biological methods.

Such a treatment process has high requirements on equipment, and the process is complex, requiring a certain scale of infrastructure, which is not conducive to mobile treatment

[0003] For the degradation of ammonia nitrogen in surface water, the current common process biological method has a slow treatment speed and only uses low-concentration water. Physical methods are expensive and not suitable for large-scale applications. Existing chemical methods have unsatisfactory treatment effects and cannot meet the standards. They need to cooperate with other methods. In summary, the degradation of low-concentration ammonia-nitrogen in surface water needs to be solved urgently. The treatment efficiency should be further improved to meet the increasingly stringent environmental protection requirements. Secondly, the complexity of the process should be simplified, and the unit treatment cost should be reduced for large-scale application. lay the foundation

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