Method for removing ammonia nitrogen pollutants from water by combining ultraviolet with active chlorine

A technology of active chlorine and pollutants, applied in the field of water treatment, to achieve the effect of simple operation, high efficiency and high removal rate

Inactive Publication Date: 2011-09-21
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Electrochemistry is also an effective method for removing ammonia nitrogen, but electrochemical treatment of small volumes of water is possi

Method used

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  • Method for removing ammonia nitrogen pollutants from water by combining ultraviolet with active chlorine

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Embodiment 1

[0016] The method for removing ammonia nitrogen by using ultraviolet light to strengthen active chlorine disclosed by the invention is used to treat ammonia nitrogen pollutants in drinking water in a certain place, and the concentration of ammonia nitrogen is 5 mg / L. The main wavelength of ultraviolet light is 254nm, and the chlorine dosage is 2.5mg / L. The residence time is 0.5 hour, and the concentration of ammonia nitrogen in the final reaction water is 0.1 mg / L.

Embodiment 2

[0018] The method for removing ammonia nitrogen by using ultraviolet light to strengthen active chlorine disclosed by the invention is used to treat ammonia nitrogen pollutants in wastewater in a certain place, and the ammonia nitrogen concentration is 1000 mg / L. The main wavelength of ultraviolet light is 254nm, and the chlorine dosage is 200mg / L. The residence time is 1.0 hour, and the concentration of ammonia nitrogen in the final reaction water is 5 mg / L.

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Abstract

The invention belongs to the field of water treatment, and provides a method capable of effectively removing ammonia nitrogen pollutants from water. The ammonia nitrogen pollutants in the water are treated by combining ultraviolet with active chlorine; an individual chlorination method is low in ammonia nitrogen removal efficiency and large in chlorine demand, and disinfection byproducts are easy to generate; individual ultraviolet does not have a treatment effect on ammonia nitrogen basically; and the ammonia nitrogen pollutants can be effectively removed from the water by combining the chlorination process with the ultraviolet process. Compared with the individual chlorination method for removing the ammonia nitrogen, the method has the advantages that: the addition amount of chlorine can be reduced, and the generation amount of the disinfection byproducts is reduced. The method is easy to operate and has a good application prospect, the ultraviolet process is mature, and an additional structure is not needed. The method can be used for removing the ammonia nitrogen pollutants from drinking water, urban sewage and industrial wastewater.

Description

technical field [0001] The invention discloses a combined removal technology of ultraviolet rays and active chlorine for removing ammonia nitrogen pollutants in water, and belongs to the technical field of water treatment. Background technique [0002] Nitrogen in water often exists in the form of nitrogen-containing organic matter, ammonia, nitrate and nitrite. Ammonia nitrogen is one of the most common pollutants in water, ammonia nitrogen includes organic ammonia nitrogen NH 3 -N and ammonium nitrogen NH 4 + -N. Ammonia nitrogen is an inorganic pollutant in water. With the improvement of the allowable discharge standard of ammonia nitrogen, higher requirements are put forward for the treatment process of ammonia nitrogen in drinking water and wastewater. At present, the removal technology of ammonia nitrogen in water is mainly divided into three categories: the first category is physical and chemical denitrification method, including breakpoint chlorination method, ch...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/32C02F1/76C02F101/16
Inventor 曲久辉赵旭刘会娟刘锐平兰华春
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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