Ammonia nitrogen removal agents are a general term for biological agents specifically used in wastewater treatment to remove ammonia nitrogen from effluents. These agents feature rapid reaction speeds, broad adaptability, and require no changes to the treatment process—simply adding a set of biochemical wastewater treatment processes is enough to utilize the ammonia nitrogen removal agents. Particularly suitable for ammonia nitrogen effluents with medium to low concentrations.

Ammonia nitrogen removers are mainly divided into two categories: one is a chemical agent, and the other is a microbial agent.