What is the best way to remove ammonia nitrogen when it exceeds the standard?

The different affinity or selectivity shown by ion exchange resin to various ions is the basic condition of ion exchange. At present, the main use of zeolite natural ion exchange substances as ion exchange substances in sewage treatment, but this method of removing ammonia nitrogen in sewage is not yet applied in China.

2. Air blow-off method

Ammonia blow-off includes three processes: one is to increase the pH value of sewage, sewage in the NH4+ into NH3; the second is the repeated formation of water droplets in the blow-off tower; the third is a large number of circulating air through the blow-off tower to increase the air-water contact, agitation of water droplets.

The main problem of this process of removing ammonia nitrogen in sewage is the need to adjust the pH value of the sewage, add a large amount of lime, the amount of pharmaceutical dosage, in addition to producing a large amount of sludge, increasing the difficulty of treatment and sludge treatment: due to the need for a large number of circulating air, it is higher power costs; the method has not yet been used in the urban sewage treatment precedents, but also a lack of experience in the operation and management, and therefore not recommended! Adoption.

3. Zhanqing HNF-MP, biological denitrification process

Biological denitrification of ammonia and nitrogen in wastewater in the role of oxygen to occur certain chemical reactions, and then realize the decomposition of ions and organic compounds, and finally the production of gas discharged to achieve the role of sewage purification. For renovation projects and new projects, the use of high-efficiency nitrifying bacteria + self-rotating packing + multi-stage self-return separator to strengthen the number of microorganisms in the reactor, greatly improving the reaction rate.