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Non ion polyacrylamide used in paint wastewater treatment
Non ion polyacrylamide is a water-soluble polymer or polymer electrolyte. Because of the existence of a certain amount of polar groups in the molecular chain, it can through the adsorption of suspended solid particles, the bridge between particles or through the charge and the particles coalesce to form large flocs. Therefore, it can accelerate the settlement of particles in the suspension, has a very clear speed up the solution to clarify, promote the effect of filtering and so on. Non ion polyacrylamide has a very good effect on the treatment of paint wastewater.
Paint wastewater was treated by enhanced coagulation test and Oxidation Flocculation Combined with high concentration of organic pollutants. The results show that the wastewater with high concentration and high concentration of high concentration and high pollution oil paint has the characteristics of high speed, good effect and economical efficiency. The key of the technology is the oxidation flocculation reactor. In the process of oxidation and flocculation, the types and properties of pollutants are required to be removed, and the mixture of organic and organic pollutants is composed of a mixture of organic and inorganic pollutants. When treatment of paint waste water flows through the oxidation flocculation composite bed device, in a certain operating conditions, the filling material in the device will have a series of physical and chemical effects, which can be used to produce a variety of new ecological coagulant and eco oxidant, such as coagulation, adsorption, catalytic oxidation, complexation, replacement, etc..
The principle of polyacrylamide flocculation sedimentation: the flocculant has high molecular weight, different ionic degree. Unstable particles can be adsorbed on the molecular chain, so in the process of the flocculant, the sludge particles in the water gradually increase, the formation of a larger flocculation, the formation of flocculation will lead to the separation of mud, easy to remove water in the dehydration. According to the suspended material properties, concentration and polyacrylamide flocculation performance, precipitation can be divided into: natural precipitation, flocculation, precipitation area. Domain to precipitate particles cry higher levels (above 5000mg / L), particle settlement surrounded by other particles influence, the particles remain in the same position relative, forming a whole sink together, and to clarify the water is clear mud interface. The two sedimentation tank and the sludge concentration tank have the regional precipitation.
Wastewater suspended solids concentration is not high, moreover does not have condensed performance, in the precipitation process, solid particles do not change shape, also is not bonded to each other, each independently complete precipitation process. The precipitation process in the deposition process of the high concentration of suspended particles, due to the high concentration of suspended particles, the particles are crowded with each other, and the water is squeezed out. Two in the process of the concentration of the sludge in the sludge bucket and the concentration of sludge in the concentrated pool, there exists the compression precipitation. Free precipitation occurs in the water suspended solids concentration is not high, the precipitation process of the suspended solids do not interfere with each other, the particles separate the precipitation, the particle precipitation trajectory is linear. The physical properties of particles, such as shape, size and specific gravity, are not changed during the precipitation process. The precipitation of the particles in the settling tank is free of precipitation.
Wastewater suspended solids concentration is not high, moreover does not have condensed performance, in the precipitation process, solid particles do not change shape, also is not bonded to each other, each independently complete precipitation process. The precipitation process in the deposition process of the high concentration of suspended particles, due to the high concentration of suspended particles, the particles are crowded with each other, and the water is squeezed out. The concentration process of the two settling tank and the concentration of sludge in the concentrated pool are the existence of the compression of the polyacrylamide.