What are the methods to remove ammonia nitrogen from wastewater?

Eight common ammonia nitrogen removal methods

1. physical method

Generally, flocculants are added to wastewater, and then some pollutants are treated with grids or other physical barrier tools to take away some organic substances.

2. Chemical precipitation method

Ammonia nitrogen is decomposed by oxidation of chemical reagents. The method has fast decomposition efficiency and treatment time of organic matter, and the medicament directly enters the water outlet.

3. Biological law

Biological nitrogen removal is widely used in sewage treatment plants, generally relying on various bacteria, activated sludge and other biological treatment. After aerobic and anaerobic treatment, a complete treatment process is formed, and organic nitrogen and ammonia nitrogen are converted into N2 and NxO gases, including nitrification and denitrification, which can effectively remove soluble and colloidal biochemical organics.

This method needs a lot of money for early adjustment, and technicians often need to maintain it for subsequent treatment, which requires high daily maintenance and should be carefully selected.

4. Folding point chlorination method

Under neutral conditions, sodium hypochlorite or chlorine gas oxidizes ammonia nitrogen into nitrogen, and nitrogen escapes from water.

5. Blow division

Ammonia stripping process is to increase the pH value of water to the range of 10. 5~ 1 1.5. Water droplets are repeatedly formed in the stripper, and ammonia escapes through a large amount of air circulation in the stripper and gas-water contact.

(For the range value of rapid detection of ammonia nitrogen in sewage water quality, use the rapid detection package of ammonia nitrogen in water quality-Amoy)

6. Ion exchange method

Ion exchange is actually an exchange reaction between exchangeable ions on insoluble ionic compounds (ion exchangers) and other ions of the same sex in solution, which is a special adsorption process.

7. Membrane separation method

Membrane separation method is a general term for separating some substances in aqueous solution by membrane.

8. Microwave method

Using the thermal effect and non-thermal effect of microwave irradiation, rapid, uniform and selective heating can greatly improve the treatment effect.