With the rapid development of industrialization and urbanization, the issue of ammonia-nitrogen wastewater discharge has become increasingly prominent, posing a serious threat to both the environment and human health. To effectively treat ammonia-nitrogen wastewater, ammonia-nitrogen treatment towers—highly efficient and environmentally friendly equipment—have been widely adopted in various wastewater treatment applications. This article introduces the working principle, technical features, application areas, and advantages of ammonia-nitrogen treatment towers.

　　The ammonia-nitrogen treatment tower primarily exploits the volatility of ammonia nitrogen. Under alkaline conditions, it uses an air-stripping process to convert ammonia nitrogen in wastewater into a gaseous phase, thereby achieving the removal of ammonia nitrogen. The working principle is mainly based on the theory of gas-liquid phase equilibrium and mass transfer rates. During the stripping process, continuous removal of the gas phase causes the ammonia concentration in the gas phase to remain consistently below its equilibrium concentration under the given conditions. As a result, dissolved ammonia in the wastewater continuously crosses the gas-liquid interface, effectively removing ammonia nitrogen from the wastewater.

　　Technical Features of the Ammonia-Nitrogen Treatment Tower

　　High Efficiency: The ammonia-nitrogen treatment tower employs high-density, low-resistance packing and liquid-film permeation technology, which significantly enhance the volatilization rate of ammonia gas and the stripping efficiency. After treatment, the ammonia-nitrogen content in the wastewater can be reduced to below the national Class I emission standard (≤15 mg/L).

　　Energy-saving and environmentally friendly: Compared with traditional physical and chemical methods, the ammonia-nitrogen treatment tower does not require the addition of any chemical agents, thereby reducing the likelihood of secondary pollution. It features a high degree of automation, enabling continuous water inflow and outflow, which in turn lowers energy consumption and labor costs.

　　Small footprint: Compared to conventional stripping towers, the ammonia-nitrogen treatment tower reduces its footprint and conserves land resources by increasing the tower’s height.

　　Wide range of applications: The ammonia-nitrogen treatment tower is suitable for treating various types of wastewater, including pharmaceutical and pesticide chemical wastewater, leachate from landfill sites, wastewater from fertilizer production, coking industry wastewater, rare-earth smelting wastewater, and domestic sewage.

　　Ammonia-nitrogen treatment towers are widely used in various wastewater treatment applications, including pharmaceuticals, agrochemical and chemical industries, landfill sites, fertilizer production, coking, rare-earth metallurgy, and domestic wastewater treatment. In these fields, ammonia-nitrogen treatment towers have demonstrated excellent treatment performance and significant economic benefits.