How to deal with the excessive ammonia nitrogen in domestic sewage?

Biological nitrogen removal technology is completed by ammoniation, nitrification, denitrification and assimilation. The traditional biological denitrification process is mature and the denitrification effect is good. However, there are also some shortcomings, such as long process flow, large floor space, frequent need for additional carbon source, high energy consumption and high cost.

When the ammonia nitrogen in domestic sewage exceeds the standard, the biological treatment method should be adjusted in time to increase the nitrification and denitrification reaction time, so that ammonia nitrogen can be degraded faster.

2. Chemical methods

Ammonia nitrogen is oxidized and decomposed by ammonia nitrogen remover. This method has the advantages of fast ammonia nitrogen decomposition efficiency and fast treatment time. Generally, it doesn't need too many complicated operations, and it can be used by adding chemicals directly to the water outlet.

3, inflection point chlorination method

Inflexion chlorination is a chemical denitrification process by adding excessive chlorine or sodium hypochlorite to oxidize ammonia nitrogen in wastewater into nitrogen. The treatment efficiency of this method can reach 90% ~ 100%, and the treatment effect is stable, which is not affected by water temperature. However, the operation cost is high, and the by-products chloramine and chlorinated organic matter will cause secondary pollution.