Ultrasonic alternating-current flocculation dephosphorization device and method

Abstract

The invention discloses an ultrasonic alternating-current flocculation dephosphorization device and method. The ultrasonic alternating-current electric flocculation dephosphorization device comprises an electric flocculation reaction tank and an ultrasonic generator. A plurality of first polar plates and second polar plates which are parallel to each other are alternately arranged in the electric flocculation reaction tank from left to right, and the first polar plates and the second polar plates are connected with two polar plates of a pulse alternating-current power supply respectively. An ultrasonic probe of the ultrasonic generator is inserted into the electric flocculation reaction tank. Alternating-current pulse electric signals are adopted, polar plate polarization can be effectively avoided, each polar plate can generate flocculation substances, wastewater is in full contact with the flocculation substances generated by the polar plates through the high polar plates and the low polar plates, meanwhile, the liquid phase is homogenized through the coupling ultrasonic technology, and polar plate polarization is avoided.

Description

technical field [0001] The invention belongs to the technical field of phosphorus-containing wastewater treatment, and in particular relates to an ultrasonic alternating current flocculation phosphorus removal device and method. Background technique [0002] With the increasing development and utilization of environmental resources by human beings, a large amount of domestic sewage and industrial wastewater containing phosphorus nutrients are discharged into rivers and lakes, which increases the phosphorus load of water bodies and leads to eutrophication of water bodies. According to statistics, the main lakes in my country are polluted by phosphorus and cause eutrophication, accounting for more than 50% of the lakes in statistics. Phosphorus in eutrophic water bodies mainly includes phosphorus entering the water body from the outside, and phosphorus released into the water body from sediments such as the bottom mud inside the water body. Studies have shown that more than 8...

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Problems solved by technology

The chemical flocculation method will cause the pH of the wastewater to rise and produce a large amount of sludge. Electrodialysis can only concentrate phosphorus together and cannot remove phosphorus fundamentally. The adsorption method is rarely used for phosphorus removal in actual life due to its regeneration problem.

Electrocoagulation is often used in sewage phosphorus removal, but electrocoagulation also has several disadvantages: the surface of the plate is easily passivated, which affects the efficiency of phosphorus removal; the flocs produced quickly settle to the bottom of the tank, and the capture of phosphorus is not complete ;The iron plate is easy to produce ferrous ions, and the ferrous ions react with the color-forming substances in the water to form organic iron compounds that are difficult to flocculate and settle, resulting in discoloration of the water body

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