Sewage treatment process and treatment device combining electroflotation and electric flocculation

Abstract

The invention discloses a sewage treatment process combining electroflotation and electric flocculation. The sewage treatment process involves the electric flocculation and the electroflotation, and sewage passes through the electric flocculation and then enters the electric flocculation for treatment; the electric flocculation includes the following steps: (1) breaking bonds; (2) performing oxidation reduction; and (3) performing flocculation and precipitation; and the electroflotation comprises the following steps: (1) when electrolyzed wastewater electrolyzes, bubbles are generated on the surface of positive and negative plates, and precipitated and floated up; (2) the bubbles are attached to impurity particles and oil in water and float to the surface of the water, and then the floating impurity particles and oil are drained by a scum channel to a sludge tank; and (3) the lower layer of an air flotation water tank is provided with a mud discharging pipe that discharges part of settled sludge according to setting time. The process of the invention utilizes a principle of electrochemistry, generates an electrochemical reaction by applying high voltage, converts electrical energyinto chemical energy, performs oxidation and reduction reactions on organic or inorganic pollutants in wastewater, then performs agglomeration and floatation and removal, thereby removing pollutants from the a water body, and can effectively remove various heavy metals and various harmful pollutants in the wastewater.

Description

technical field [0001] The invention relates to sewage treatment equipment and methods, in particular to an electric flotation combined with electric flocculation sewage treatment process and treatment equipment. Background technique [0002] At present, most wastewater treatment devices use physical and chemical methods to add chemical agents to the wastewater, so that the impurities in the wastewater form large flocculation sediments, which are removed by precipitation. The shortcomings of this product mainly include the following points: (1) ) Dosing of chemical agents (2) The precipitated sludge forms secondary pollution (3) The operating costs of chemical agents are high (4) The operation of personnel is complicated. [0003] The main pollutants in wastewater are suspended particles, and the water quality is characterized by suspended solids and chromaticity exceeding the standard. The chromaticity is caused by suspended solids. Since the solid particles in wastewater a...

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Problems solved by technology

[0002] At present, most wastewater treatment devices use physical and chemical methods to add chemical agents to the wastewater, so that the impurities in the wastewater form large flocculation sediments, which are removed by precipitation. The shortcomings of this product mainly include the following points: (1) ) Dosing of chemicals (2) Sedimentary sludge forms secondary pollution (3) High operating costs of chemicals (4) Complicated operations by personnel

[0003] The main pollutants in wastewater are suspended particles, and the water quality is characterized by suspended solids and chromaticity exceeding the standard. The chromaticity is caused by suspended solids. Since the solid particles in wastewater are small and the specific gravity is close to that of water, it is difficult to settle naturally by gravity; let it flow Not only will it cause pollution to the surrounding environment, but it will also cause a great waste of water resources; the traditional wastewater technology mainly uses chemical agents to destabilize and aggregate tiny suspended solids to form large particles, which are then removed by sedimentation and filtration

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