Treatment method for removing ammonia nitrogen in domestic wastewater

Abstract

The invention discloses a treatment method for removing ammonia nitrogen in domestic wastewater. A water collection well, a coarse grid, a primary sedimentation tank, a pH (Potential of Hydrogen) value regulation tank, a cross-linked polyvinylpyrrolidone supporter adsorption and purification system, an aeration tank, a biological phosphorous removal tank, a secondary sedimentation tank, a water purification tank, an acid washing tower and the like are arranged. According to the system disclosed by the invention, cross-linked polyvinylpyrrolidone (PVPP) is creatively used for selectively adsorbing the ammonia nitrogen in water, and carbonyl in a molecular structure and an amino can be compounded to from a hydrogen bond complex. Artificial zeolite containing the cross-linked polyvinylpyrrolidone is mixed with the domestic wastewater so that the ammonia nitrogen in the domestic wastewater is sufficiently adsorbed; the adsorbed ammonia nitrogen is released from the cross-linked polyvinylpyrrolidone through a heating and desorption manner and is released in the form of ammonia gas; after tail gas is subjected to acid washing purification treatment, the gas is discharged. Meanwhile, thedomestic wastewater, which is adsorbed by a cross-linked polyvinylpyrrolidone-artificial zeolite supporter to remove the ammonia nitrogen, enters the 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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