Removal of ammonia nitrogen from wastewater

Whether at work or in life, we cannot avoid producing a large amount of wastewater. In addition to domestic water, industrial wastewater is also very large. But everyone knows that the fresh water resources on the earth are limited, so wastewater also needs to be used reasonably. In particular, a lot of wastewater can be reused after treatment. Wastewater mainly contains a lot of ammonia and nitrogen, which can be reused after being removed. So, how to remove ammonia and nitrogen from wastewater?

This method oxidizes the ammonia in the wastewater into N2 by adding excess chlorine or sodium hypochlorite. The breakpoint chlorination method has a high removal rate for ammonia nitrogen, a more stable treatment effect, and is not affected by water temperature. However, the operating costs are relatively high during the treatment process.

2) Air stripping method:

Under alkaline conditions, ammonia nitrogen mainly exists in the form of NH3. By allowing the wastewater to fully contact with the air, the volatile NH3 in the water will transfer from the liquid phase to the gas phase. It is affected by factors such as wastewater pH, temperature, hydraulic load, and scaling control.

Under aerobic conditions, ammonia nitrogen is oxidized into nitrite nitrogen and nitrate nitrogen by the action of nitrite bacteria and nitrate bacteria. Factors such as temperature, pH value, dissolved oxygen, etc. will affect the treatment effect.

The three-dimensional scaling of zeolite has regular pore structure and holes for screening and exchange adsorption. This method is greatly affected by the pH value of the solution.

Among the many ammonia nitrogen wastewater treatment processes, the physical and chemical method has a relatively high operating cost and is prone to secondary pollution and other problems, so its actual application is subject to certain restrictions. However, the biological method for treating ammonia nitrogen wastewater is more economical and has better treatment effects, so it is widely used. During the removal of ammonia nitrogen from wastewater, the treatment effect is affected by factors such as temperature, pH, and effluent, and the treatment results may have a certain gap with the emission standards. When encountering this phenomenon, it is recommended to add ammonia nitrogen treatment agents for auxiliary treatment, which can reduce ammonia nitrogen to below the emission standard. This agent is a functional agent specially designed for low-concentration wastewater treatment. It is easy to operate and can be added at the front end of the discharge port without changing the original treatment process.