Method for treating waste water containing ammonia and nitrogen

Abstract

The invention discloses a method for treating waste water containing ammonia and nitrogen, comprising the steps of: firstly, separating and recycling high content substances in ammonium nitrate waste water and enabling the discharged water to reach the national discharge standard through employing that electrodialysis has operation capacity under the working conditions of sparingly soluble salt and over-saturation; and secondly, deeply treating the discharged water meeting the standard by utilizing reverse osmosis to enable the discharged water to totally meet the indexes of desalted soft water used in ammonium nitrate industry, and simultaneously carrying out electrodialysis separation circulating treatment and recycling to achieve the effect of zero discharge of waste water in an entire system.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a wastewater treatment method containing ammonia and nitrogen. Background technique [0002] With the rapid development of fertilizer, petrochemical and other industries, the resulting high-ammonia nitrogen wastewater has become one of the constraints on the development of the industry; it is reported that in 2001, there were as many as 77 red tides in my country's sea areas, and ammonia nitrogen is one of the important causes of pollution. One, especially the pollution caused by high-concentration ammonia nitrogen wastewater. Therefore, the economical and effective control of high-concentration ammonia-nitrogen wastewater pollution has become an important research topic for current environmental protection workers, and has been highly valued by people in the industry. At present, conventional technologies such as physical and chemical methods for treating ammonia nitrogen wastewa...

AI Technical Summary

Problems solved by technology

Although the chemical neutralization method can neutralize the ammonia nitrogen in the water, the chemical consumption is large, the operating cost is high, and secondary pollution may occur, and useful substances in the wastewater cannot be recovered, and multi-effect evaporation and condensation require a large amount of energy. The free ammonia evaporates and is discharged together with steam, which will cause air pollution

Comprehensive analysis shows that the existing technologies have their own advantages and disadvantages, but in the end they cannot form the recycling of resources and solve the problems of secondary pollution. Therefore, in terms of technology promotion and application, they are limited by the application of the industry.

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