Method of using ozone and trace calcium peroxide to remove low-concentration ammonia nitrogen in water

Abstract

The invention discloses a method of using ozone and trace calcium peroxide to remove low-concentration ammonia nitrogen in water. The method comprises: adding 0.001-0.01 g / L of calcium peroxide into water; using a pure oxygen generator to make pure oxygen, placing the pure oxygen generator in an ozone generator, and using the pure oxygen from the pure oxygen generator as an oxygen source to the ozone generator, thereby producing ozone; introducing the water into an aerating tank and through the ozone generated by the ozone generator. The trace calcium peroxide can cooperate with the ozone so as to degrade ammonia nitrogen in water within a short time, the removal rate is up to 99%, the treatment time may shorten to 15 min, no secondary pollution is caused to the water, and the concentration of calcium peroxide may decrease to 0.001 g / L. The method herein is good in safety and reliability and very low in cost; the method helps evidently reduce the stink of black and odorous water and evidently increase the content of dissolved oxygen in the water.

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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