Do you know what are the sources and hazards of ammonia nitrogen wastewater?​

Do you know what are the sources and hazards of ammonia nitrogen wastewater? With the development of industry and agriculture and the improvement of people's living standards, the discharge of nitrogen-containing wastewater has increased sharply, and it has become a major source of environmental pollution and has attracted much attention. Do you guys know what is high concentration ammonia nitrogen wastewater? Do you know the hazards of high-concentration ammonia nitrogen wastewater? The editor will explore the past and present of high-concentration ammonia nitrogen wastewater with everyone. The pathways for nitrogenous substances to enter the water environment mainly include two aspects: natural processes and human activities. The natural sources and processes of nitrogenous substances entering the water environment mainly include precipitation and dustfall, non-urban runoff, and biological nitrogen fixation. Human activities are also an important source of nitrogen in the water environment, mainly including untreated or treated urban domestic and industrial wastewater, various leachate and surface runoff. Synthetic chemical fertilizers are the main source of nitrogen nutrients in water bodies, and most of the nitrogen compounds that are not used by crops are carried into groundwater and surface water by farmland drainage and surface runoff. With the development of industries such as petroleum, chemical industry, food and pharmaceuticals, and the continuous improvement of people's living standards, the content of ammonia nitrogen in urban domestic sewage and landfill leachate has risen sharply. In recent years, with the development of the economy, more and more nitrogen-containing pollutants have been discharged randomly, which has caused great harm to the environment. Nitrogen exists in various forms such as organic nitrogen, ammoniacal nitrogen (NH4+-N), nitrate nitrogen (NO3--N) and nitrite nitrogen (NO2--N) in wastewater, and ammoniacal nitrogen is the main one of the forms of existence. Ammonia nitrogen in wastewater refers to nitrogen in the form of free ammonia and ionic ammonium, which mainly comes from the decomposition of nitrogen-containing organic matter in domestic sewage, industrial wastewater such as coking and synthetic ammonia, and farmland drainage. There are many sources of ammonia nitrogen pollution, the amount of discharge is large, and the concentration of discharge varies greatly. The discharge of a large amount of ammonia nitrogen wastewater into the water body not only causes eutrophication of the water body, causes the water body to be black and smelly, increases the difficulty and cost of water supply treatment, and even produces toxic effects on people and organisms. The general formation of ammonia nitrogen wastewater is caused by the coexistence of ammonia water and inorganic ammonia. Generally, the main source of ammonia nitrogen in wastewater with a pH above neutral is the joint action of inorganic ammonia and ammonia water. The ammonia nitrogen in wastewater is under acidic conditions. Mainly due to inorganic ammonia. There are two main components of ammonia nitrogen in wastewater, one is ammonia nitrogen formed by ammonia water, and the other is ammonia nitrogen formed by inorganic ammonia, mainly ammonium sulfate, ammonium chloride and so on. The hazards of high ammonia nitrogen wastewater mainly include the following aspects: on the one hand, ammonia nitrogen in wastewater is an important substance for eutrophication of water bodies and environmental pollution, which can easily cause algae and other microorganisms to multiply in large quantities in the water, and the operation of tap water treatment plants is difficult, causing drinking water odor, In severe cases, the dissolved oxygen in the water will drop, a large number of fish will die, and even the lake will dry up and perish. On the other hand, ammonia nitrogen will also increase the amount of chlorine used in water supply and industrial circulating water treatment; it is corrosive to some metals (copper); when sewage is reused, ammonia nitrogen in regenerated water can promote The reproduction of microorganisms forms biofouling, blocks pipes and water equipment, and affects heat exchange efficiency. Secondly, ammonia is oxidized to nitrite and nitrate under the action of nitrification, and nitrate is induced by drinking water to induce methemoglobinemia in infants, while nitrosamines generated after hydrolysis of nitrite are highly carcinogenic and directly threaten human health.