An electrochemical denitrification and dephosphorization device and method

Abstract

The invention belongs to the technical field of wastewater treatment, and discloses an electrochemical nitrogen and phosphorus removal device and method. The device includes a three-dimensional electrocatalytic oxidation unit reactor, a three-dimensional electro-biological coupling unit reactor, a light filter material filter unit reactor and a three-dimensional electrocoagulation dephosphorization unit reactor; the main water inlet pipe, three-dimensional electrocatalytic oxidation unit reactor, The three-dimensional electrobiological coupling unit reactor and the light filter material filter unit reactor are connected in sequence; the outlet pipe of the light filter material filter unit reactor is respectively connected with the main outlet pipe and the water inlet pipe of the three-dimensional electrocoagulation dephosphorization unit reactor ; The outlet pipe of the three-dimensional electrocoagulation dephosphorization unit reactor is connected with the inlet pipe of the light filter material filter unit reactor through a return pump and a check valve. The bottom of the tank body of each reactor is provided with an aeration pipe and a vent pipe. The invention can achieve the purpose of high-efficiency treatment of sewage through the joint action of electrochemical flocculation, electrocatalytic oxidation and electroactive microorganisms, and has the advantages of high efficiency of nitrogen and phosphorus removal.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to an electrochemical nitrogen and phosphorus removal device and method. Background technique [0002] At present, the sewage treatment and discharge standards in various places are becoming increasingly stringent, the pollution of water sources in sensitive areas is prominent, and the need for treatment is urgent. Traditional biological denitrification and phosphorus removal can only meet the demand for carbon source of biological nitrogen and phosphorus removal when the raw sewage BOD5 / TN value is greater than 4-6, and the BOD5 / TP value is greater than 20, usually COD<200mg / L, Sewage with COD / TN<8 is called low-carbon source sewage. For high ammonia nitrogen and low carbon source domestic sewage with high ammonia nitrogen content and extremely low C / N ratio, the application of biological nitrogen and phosphorus removal process will have long residen...

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Problems solved by technology

[0005] Two-dimensional electrocoagulation has begun to be gradually applied in the field of decentralized sewage phosphorus removal, but it still has problems such as high energy consumption and the failure of total phosphorus in the effluent to meet higher discharge standards.

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