Technology for reducing content of ammonia nitrogen in sewage to reach emission standard

Abstract

The invention discloses a technology for reducing the content of ammonia nitrogen in sewage to reach the emission standard and relates to the field of sewage discharge treatment. The technology comprises the following steps: reducing and separating suspended solids in sewage to be treated, carrying out ultrafiltration on sewage with reduced content of suspended solids, carrying out separation andreverse osmosis to obtain a liquid 3, treating through a zeolite-containing nitrogen absorbing device until the concentration of ammonia nitrogen is less than 15 mg / l, and treating through an ozone oxidation unit to obtain a liquid 5 with COD and BOD of organic matter being within prescribed limits. Wastewater management of the whole system is greatly simplified, substantial economic cost is saved, safe emission is realized, and surface pollution is reduced. Meanwhile, a filter substance from a first ultrafiltration module and a second ultrafiltration module enters the circulation once again through a recirculation pipeline, and ammonia nitrogen retentate from the separation and reverse osmosis device enters the circulation once again through a recirculation loop. Thereby, work efficiencyof the first ultrafiltration module and the second ultrafiltration module is improved, and then percentages of a liquid 2 and the liquid 3 are increased.

Description

technical field [0001] The invention relates to the field of sewage discharge treatment, in particular to a process for reducing ammonia nitrogen content in sewage to meet discharge standards. Background technique [0002] In recent years, with the development of all walks of life in society, water pollution problems have also been brought about. Sewage contains high-concentration organic matter, COD, and TDS ammonia nitrogen, which must be treated before it can be discharged. Especially the ammonia nitrogen content in sewage must be treated to reach Emission standards can be discharged to avoid environmental pollution. However, in the prior art, the process of sewage treatment is complex, the cost of management and operation is high, and the treatment technology is not mature enough, so that the sewage discharge does not meet the standards and causes environmental pollution. Therefore, it is urgent to develop a method that can realize It is a process for reducing the ammoni...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a process for reducing the content of ammonia nitrogen in sewage to meet the discharge standard, to solve the problem of complex process of sewage treatment in the prior art, high management and operation costs and immature treatment technology, which makes sewage discharge not up to standard and causes environmental pollution. contamination defect

Images