Ammonia nitrogen is an important pollutant in aquatic environments, primarily originating from domestic sewage and industrial wastewater. Excessive ammonia nitrogen can lead to eutrophication of water bodies, triggering massive algal blooms, disrupting the ecological balance of aquatic ecosystems, and potentially causing toxic effects on aquatic organisms. The emergence of ammonia-nitrogen treatment towers provides a reliable solution for effectively removing ammonia nitrogen from water bodies.

　　The working principle of an ammonia-nitrogen treatment tower is based on a variety of physical and chemical processes. One common application of this principle is the stripping method. In an ammonia-nitrogen treatment tower, air is bubbled into the wastewater, causing the ammonia nitrogen in the water to transfer from the liquid phase to the gas phase in the form of ammonia gas. Since ammonia gas exists in aqueous solution at an equilibrium state, continuous bubbling of air disrupts this equilibrium, allowing ammonia gas to continuously escape from the water. This process requires appropriate conditions, such as suitable temperature and gas-liquid ratio. Generally speaking, higher temperatures favor ammonia-nitrogen stripping, because as the temperature rises, the solubility of ammonia gas in water decreases, making it easier for ammonia gas to escape.

　　In addition to the stripping method, ammonia-nitrogen treatment towers may also employ the principle of chemical absorption. For example, an acidic solution can be used to absorb ammonia gas. By installing a specific packing layer inside the tower, when the gas containing ammonia nitrogen passes through this packing layer, it comes into full contact with the acidic solution. The ammonia gas then undergoes a chemical reaction with the acid, thereby being absorbed and fixed. This chemical absorption method can achieve highly efficient removal of ammonia nitrogen and allows for further processing of the absorbed products, thus preventing secondary pollution.

　　The structural design of the ammonia-nitrogen treatment tower plays a crucial role in its treatment performance. The tower body is typically made of high-quality, corrosion-resistant materials to withstand erosion from wastewater and chemical agents. The packing inside the tower is a key component; high-quality packing can increase the gas-liquid contact area and enhance mass-transfer efficiency. Common types of packing include Raschig rings and Pall rings, which have different shapes and structural characteristics. Raschig rings have a simple structure and lower cost, but their mass-transfer efficiency is relatively limited. In contrast, Pall rings represent an improvement over Raschig rings, featuring higher porosity and greater mass-transfer efficiency.

　　In actual operation, the operational parameters of the ammonia-nitrogen treatment tower need to be carefully adjusted. For example, controlling the air flow is crucial. If the air flow is too low, the stripping effect will be poor, resulting in a low ammonia-nitrogen removal rate; however, if the air flow is too high, it will lead to energy waste and may also cause wastewater to splash around inside the tower and generate foam, thereby compromising the treatment efficiency. In addition, the liquid level in the treatment tower must be maintained within an appropriate range: a liquid level that is too high could cause wastewater to overflow, while a liquid level that is too low might impair gas-liquid contact.

　　Ammonia-nitrogen treatment towers have wide-ranging applications across numerous industries. In municipal wastewater treatment plants, they are among the core treatment equipment, ensuring that the ammonia-nitrogen content of wastewater meets national standards before discharge. In certain industrial sectors—such as chemical engineering and food processing—the wastewater generated by these industries often contains high levels of ammonia nitrogen. Ammonia-nitrogen treatment towers can effectively treat this wastewater, bringing it into compliance with environmental emission requirements and preventing serious environmental pollution.

　　As environmental protection requirements continue to tighten, the technology of ammonia-nitrogen treatment towers is also undergoing continuous development and innovation. New materials, more efficient packing materials, and intelligent operation and control systems are constantly emerging, enabling ammonia-nitrogen treatment towers to play an increasingly significant role in water purification and laying a solid foundation for protecting water resources and improving the ecological environment.