Method for treating trace ammonia nitrogen

Abstract

The invention relates to a method for treating trace ammonia nitrogen. The method is characterized by comprising the steps of chlorine dioxide activation, pre-oxidation and ammonia nitrogen treatmentprocess as well as PH value adjustment and filtration of water body. The method provided by the invention adopts a chlorine dioxide ammonia nitrogen treatment method; the method is more suitable for the low-concentration ammonia nitrogen wastewater than a blow-off method and a biological method, and solves the problem that the safety of a break point chlorination method is low; a green water treatment agent-chlorine dioxide, which is popularized all over the world at present, is adopted, and manganese ions, iron ions and the like in the wastewater are pre-oxidized by means of the strong oxidizing property of chlorine dioxide; the wastewater then reacts with the ammonia ions, so that ammonia nitrogen in the wastewater is converted into nitrogen. The treated water completely meets the related emission standards of China.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a treatment method for trace amounts of ammonia nitrogen. Background technique [0002] The main methods for removing ammonia nitrogen from wastewater are: physical method, chemical method and biological method. Physical methods include reverse osmosis, distillation, soil irrigation and other treatment technologies; chemical methods include ion exchange, ammonia stripping, break point chlorination, incineration, chemical precipitation, catalytic cracking, electrodialysis, electrochemical and other treatment technologies; biological methods include algae Breeding, biological nitrification, immobilized biotechnology and other treatment technologies. At present, the more practical methods are: breakpoint chlorine addition method, ammonia stripping method, and biological method. 1. Breakpoint chlorination method. The breakpoint chlorination method is a chemical denitrific...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of treatment method of trace ammonia nitrogen, adopt chlorine dioxide ammonia nitrogen treatment method, this method has the ammonia nitrogen waste water that is more suitable for low concentration than stripping method and biological method, and solves the problem To solve the problem of low safety of the breakpoint chlorination method, the green water treatment agent chlorine dioxide, which is currently popularized and used all over the world, uses its strong oxidizing properties to pre-oxidize manganese ions and iron ions in wastewater, and then react with ammonia The ion reaction converts the ammonia nitrogen in the water into nitrogen, so that the treated water can fully meet the relevant national discharge standards