System and method for advanced treatment of drinking water based on vertical flow type three-phase hybrid reactor

Abstract

The invention discloses a system and a method for advanced treatment of drinking water based on a vertical flow type three-phase hybrid reactor, which belong to the field of water treatment. The system comprises a vertical flow type three-phase hybrid reactor, a magnetic resin regeneration tank, a magnetic resin washing tank and a nanofiltration system and is characterized in that: the vertical flow type three-phase hybrid reactor is connected with the magnetic resin regeneration tank; the magnetic resin regeneration tank is connected with the magnetic resin washing tank and the nanofiltration system respectively; and the magnetic resin washing tank is connected with the vertical flow type three-phase hybrid reactor. The method comprises the following steps of: performing three-phase hybrid; adsorbing; separating solid, liquid and gas; regenerating magnetic resin; cleaning; and reusing desorption liquid. By the system and the method, over 50 percent of CODMn, over 70 percent of ammonia nitrogen, over 40 percent of nitrate radical and over 50 percent of sulfate radical in the conventional outflow water of the drinking water can be removed, and the quality of the outflow water is stable.

Description

technical field [0001] The invention relates to a drinking water advanced treatment device and method, more specifically, a drinking water advanced treatment system and method based on a vertical flow three-phase mixing reactor. Background technique [0002] At present, the advanced treatment methods of drinking water mainly include ozone / activated carbon method, membrane method and magnetic resin adsorption method. These methods have the following problems in the application process: [0003] 1) Ozone / activated carbon, as a traditional advanced treatment technology for drinking water, has been widely used in domestic water plants. However, if ozone does not completely oxidize organic matter in water, it will generate disinfection by-product precursors, resulting in the formation of halogenated alkanes in the subsequent chlorine disinfection process. Hydrocarbons and haloacetic acids, which increase the biological toxicity of drinking water; [0004] 2) The membrane method ...

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Problems solved by technology

[0003] 1) Ozone / activated carbon, as a traditional advanced treatment technology for drinking water, has been widely used in domestic water plants. However, if ozone does not completely oxidize organic matter in water, it will generate disinfection by-product precursors, resulting in the formation of halogenated alkanes in the subsequent chlorine disinfection process. Hydrocarbons and haloacetic acids, which increase the biological toxicity of drinking water;

[0004] 2) The membrane method can effectively remove all kinds of pollutants in water and improve the quality of effluent water. It has become an important technology in the field of water treatment. However, the investment and operation cost of membrane technology is high, and it is not suitable for water plants with large water volumes. At the same time, the problem of membrane pollution has not been solved. fundamental solution;

[0008] The disadvantages of this reactor are (1) a settling tank needs to be added in the rear part of the reactor, which requires high equipment investment and a large floor area; (2) the speed of the mechanical paddle stirrer is too slow to fully mix the water and resin, and the stirring speed is too high Faster will break the resin, resulting in increased resin loss

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