Treatment method for removing ammonia nitrogen in domestic wastewater

Abstract

The invention discloses a treatment method for removing ammonia nitrogen in domestic wastewater. A system comprises a water-collecting well, a coarse grid, a primary settling tank, a pH value regulating tank, a cross-linked polyvinylpolypyrrolidone supporter absorption and purification system, an aeration tank, a biological phosphorus removal tank, a secondary settling tank, a clear water tank, a pickling tower and the like. The system creatively utilizes the selective absorption of polyvinylpolypyrrolidone (PVPP) for the ammonia nitrogen in the wastewater, and a carbanyl group in a molecular structure can be compounded with an amino group to form a hydrogen bond complex. Artificial zeolite containing the cross-linked polyvinylpolypyrrolidone is mixed with the domestic wastewater to fully absorb the ammonia nitrogen in the domestic wastewater; the absorbed ammonia nitrogen is released by the cross-linked polyvinylpolypyrrolidone in a form of ammonia in a heating desorption manner, and tail gas is discharged after pickling and purification treatment. Meanwhile, the domestic wastewater in which the ammonia nitrogen is removed by cross-linked polyvinylpolypyrrolidone-artificial zeolite supporter absorption enters a next treatment link.

Description

technical field [0001] The invention relates to a treatment method for removing ammonia nitrogen in domestic wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] In recent years, with the continuous improvement of the living standards of urban people in our country, the nitrogen content in urban domestic wastewater has risen sharply, and the random discharge of more and more nitrogen-containing wastewater has caused great harm to the environment. Nitrogen is present in wastewater as organic nitrogen, ammoniacal nitrogen (NH 4 + -N), nitrate nitrogen (NO 3 - -N) and nitrite nitrogen (NO 2 - -N) and other forms, and ammonia nitrogen is one of the most important forms. Ammonia nitrogen in domestic wastewater refers to nitrogen in the form of free ammonia and ionized ammonium, which mainly comes from food residues and laundry sewage. There are many pollution sources of ammonia nitrogen, the discharge amo...

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Problems solved by technology

[0012] Due to the shortcomings of the above-mentioned traditional treatment methods such as high cost, complicated technology, and unstable treatment effect, it is necessary to get rid of the existing treatment technology ideas, open up a new way to deal with ammonia nitrogen in domestic wastewater, and then develop a new form of life. Ammonia nitrogen treatment technology in wastewater

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