Phosphating wastewater treatment system and method

Abstract

The invention provides a phosphating wastewater treatment system and method. The phosphating wastewater treatment system comprises a phosphating wastewater adjusting pool, which is connected with a reaction pool, wherein the reaction pool is connected with a central adjusting pool, the central adjusting pool is connected with a flocculation pool, the flocculation pool is connected with a sedimentation pool, the solid phase outlet of the sedimentation pool is connected with a sludge concentration pool, the sludge concentration pool is connected with a filter press, the liquid phase outlet of the sedimentation pool is connected with an intermediate water pool, the intermediate water pool is connected with a sand filter tank, the sand filter tank is connected with a neutralization pool, the neutralization pool is connected with a biochemical treatment system, the reaction pool, the central adjusting pool and the flocculation pool adopt a triple box type structure, a stirrer is arranged inthe central adjusting pool, and a lime supply box is connected in the reaction pool, and the flocculation pool is connected with a flocculant adding box. According to the invention, environmental pollution caused by phosphatization wastewater is avoided, and up-to-standard discharge of wastewater is realized.

Description

Technical field: [0001] The invention relates to a phosphating wastewater treatment system and a treatment method, belonging to the technical field of wastewater treatment. Background technique: [0002] The phosphating waste water produced by automobile painting enterprises mainly comes from the nickel, phosphorus and zinc-containing waste water of the phosphating system (phosphating and post-phosphating washing stage). processing method. At the same time, nickel containing the first category of pollutants must reach the maximum allowable discharge concentration of the first category of pollutants after the treatment process. [0003] Phosphating wastewater Phosphating wastewater generally refers to anodic oxidation wastewater, industrial phosphorus-containing wastewater, phosphoric acid wastewater, etc. The phosphorus in these wastewaters is generally orthophosphate. For this type of phosphorus, traditional phosphorus removal agents are generally used for treatment, such ...

AI Technical Summary

Problems solved by technology

Pesticide phosphorus-containing wastewater from chemical fertilizer factories Chemical fertilizer factories or pesticide wastewater are generally organic phosphorus wastewater. For this type of organic phosphorus wastewater, two processes are used for treatment, oxidation treatment or biochemical treatment. Oxidation treatment of wastewater is to oxidize organic phosphorus into orthophosphorus. Then add orthophosphorus remover for treatment. These two processes are more practical for pesticide wastewater in chemical fertilizer plants. If the water volume is relatively large, the above methods are not thorough enough and the effect is not ideal.

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