How to check the treatment method of electrophoret

2022-08-26
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[how to pass the environmental protection inspection] the method of electrophoretic paint wastewater treatment

since last July, environmental protection supervision has been carried out throughout the country, resulting in the closure and rectification of many enterprises, most of which are due to the illegal discharge of emission reduction wastewater. As we all know, electrophoretic paint is a kind of water-based paint suitable for electrophoretic coating. It can be widely used in automobiles, household appliances, furniture and other hardware coating

however, during electrophoretic coating, the coated parts often need to be washed with a large amount of water to remove the floating paint and sediment attached to them. This washed water is generally called electrophoretic paint wastewater

in these electrophoretic paint wastewater, there are harmful chemicals such as epoxy resin, paint, vegetable oil, carboxylic acid, butanol and pigment. If the experimental results are pre determined to be unqualified and invalid, the components are complex and difficult to biodegrade, which will cause great harm to the environment

therefore, we should take relevant measures to treat these wastewater and deal with the general trend of environmental protection

what are the methods for treating electrophoretic paint wastewater

treatment method of electrophoretic paint wastewater:

1. Coagulation method:

this method is mainly used to treat wastewater by adding inorganic coagulants or polymer coagulants to the wastewater, so as to destroy the settlement stability of its solution, make it agglutinate, precipitate and form agglutination blocks

2. Air flotation method:

air flotation method mainly relies on many fine air saturated attached to the flocs, making its density less than 1 and floating up for removal, adhering to the air saturated flocs. When the equipment is initially put into operation, its separation speed should be protected. The degree of protection will be directly proportional to the density difference between the liquid and the gas floc and the square of the equivalent diameter of the gas floc. In this way, the equivalent diameter of the gas saturated floc can be increased, and the density difference between the gas and the liquid can be increased, which can greatly increase the speed of solid-liquid separation

3. Transaction difference membrane separation method:

membrane separation method, as the name suggests, is the process of solvent separation with the help of external pressure, external pressure and semi permeable membrane. The membrane separation methods mainly include ultrafiltration, reverse osmosis and electrodialysis, while the membrane separation methods used to treat electrophoresis coating wastewater are mostly ultrafiltration and reverse osmosis

4. Biochemical treatment method:

this method mainly uses the life activities of microorganisms to oxidize and decompose harmful substances in electrophoresis wastewater. It can effectively remove colloidal organic substances dissolved in wastewater, with high treatment efficiency and low cost. The purified water quality can meet the discharge standard

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