High-concentration ammonia nitrogen wastewater treatment and recycling technology

Cutting-edge environmental information sharing

The atmosphere is rich in ammonia, which is a sufficient and necessary condition for frequent haze explosions!

In the winter of 2017, the average concentration of PM2.5 in Beijing-Tianjin-Hebei and surrounding areas was 85 micrograms per cubic meter, of which nitrate, sulfate, and ammonium salts accounted for 19%, 12%, and 11%, respectively, revealing the atmospheric PM2 in Beijing-Tianjin-Hebei. 5 Chemical characteristics have changed significantly, with similar results measured in the winter of 2018. The rapid generation of components such as nitrate, sulfate, and ammonium has boosted the explosive growth of PM2.5. The ammonium salt is mainly produced by the neutralization reaction of ammonia (NH3) with sulfur, nitrogen and other acidic substances; the concentration of ammonia in the atmosphere of Beijing, Tianjin, Hebei and surrounding areas is significantly higher than that of developed countries and regions such as the United States, which is in an ammonia-rich state.

In recent years, the concentration of SO2 in the region has continued to decline, and the concentration of NH3 in the atmosphere has increased without decline, which is more conducive to the formation of nitrates.

Part1 Overview of ammonia nitrogen wastewater source and treatment technology

Overview of ammonia nitrogen wastewater source and main treatment technology

The main methods of ammonia nitrogen wastewater treatment:

Biochemical method, inflection point chlorine method, ion exchange method, chemical precipitation method (MAP), membrane method, air stripping method, steam stripping method, etc.

Part2 High-concentration ammonia nitrogen wastewater treatment and resource utilization technology

Schematic diagram of the process of recovering ammonia water by stripping ammonia removal at atmospheric pressure

Schematic diagram of the process of recovering ammonia water by negative pressure stripping and deamination

core advantages

Part3 project performance

Typical industries: ternary lithium battery industry, non-ferrous metals, coal chemical industry, pesticides, medicine, glass, chlor-alkali, photovoltaic, etc.

Partial performance list in the past 3 years: glass / photovoltaic / chemical industry

List of partial performance in the past 3 years: ternary precursor cathode materials industry for power lithium batteries

Unit	Xuancheng Yabang Chemical
Scale	1200 tons / day ammonia nitrogen wastewater
Water	Ammonia nitrogen concentration is about 7000mg / L
Effluent	Ammonia nitrogen≤15mg/L
Recycle	≥20% ammonia
Industry	Chemical Industry (Pigment)