Electrochemical autotrophic denitrification integrated reactor for removing nitrate nitrogen in water

Abstract

The invention discloses an electrochemical autotrophic denitrification integral reactor for removing nitrate nitrogen in water, which comprises a barrel type foaming nickel cathode, a graphite anode, a reactor body, a direct-current power supply, a water outlet, sampling openings, a porous baffle plate and a water inlet, wherein the barrel type foaming nickel cathode is arranged inside the reactor body; the center of the barrel type foaming nickel cathode is provided with the graphite anode; the barrel type foaming nickel cathode and the graphite anode are fixed on the reactor body through the porous baffle plate; the direct-current power supply is connected with the barrel type foaming nickel cathode and the graphite anode; the bottom of the reactor body is provided with the water inlet, and the top of the reactor body is provided with the water outlet; and a plurality of sampling openings are arranged on the side wall of the reactor body. The electrochemical autotrophic denitrification integral reactor can effectively remove nitrate pollutant in ground water or surface water, wherein the removal rate of nitrate can reach more than 70 percent and the content of nitrite is below 0.01 milligram per liter, so as to reach the quality standard for drinking water.

Description

technical field [0001] The invention relates to the treatment of groundwater and surface water in the field of environmental protection, in particular to an electrochemical autotrophic denitrification integrated reactor for removing nitrate nitrogen from water. Background technique [0002] The treatment methods of nitrate in groundwater mainly include physical and chemical methods, biological denitrification and chemical denitrification. [0003] Physicochemical methods mainly include ion exchange, reverse osmosis and electrodialysis. [0004] Conventional ion exchange processes include anion exchange with chloride ion and bicarbonate ion resins. However, the ion exchange method consumes a large amount of regenerative chemicals, and it will cause secondary pollution when discharged. [0005] Reverse osmosis can not only remove NO from groundwater 3 - -N, also removes C1 at the same time - , SO 4 2- , Ca 2+ , Mg 2+ etc., are superior to other methods. However, this...

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Problems solved by technology

Removal of NO by chemical denitrification 3 - The reaction process of -N will produce reaction by-products, the reaction conditions are difficult to control, and the recovery and separation of the catalyst is a problem that needs to be solved

[0009] From the perspective of efficiency and cost, the biological denitrification method is the best method that has been put into practice at present, but it still has some shortcomings, such as high management requirements, not suitable for small-scale or decentralized water supply treatment, and requires follow-up Processing etc.

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