A treatment and reuse method of shock-light wastewater and its application

Abstract

The invention discloses a vibrating polishing wastewater treatment and reuse method and an application of treated vibrating polishing wastewater. After vibrating polishing wastewater is acidized and has an electrocoagulation synergized decomplexation reaction, the pH value is adjusted to range from 8 to 9 through a coagulant aid CaO or Ca(OH)2, an anion flocculant is added, the mixture is subjected to precipitation separation, and nickel in supernatant liquor is lower than 0.15 mg / L; the supernatant liquor enters microfiltration and nanofiltration devices, the content of SS (suspended solids) in effluent is smaller than 20 mg / L, the content of nickel ions is under 0.1 mg / L, the biodegradability is improved, and the phenomena that microorganisms entering a biochemical pond are prone to poisoning, biological membranes easily fall off and the like are avoided; macromolecular organic matters continue to be decomposed into micromolecular organic matters through hydrolytic acidification and contact oxidation, the micromolecular organic matters are adsorbed by the biological membranes and are decomposed into CO2, H2O and N through oxidization, and COD (chemical oxygen demand) can be reduced under 50 mg / L. After passing through a secondary sedimentation tank, final discharged water can meet the national first-level discharge standard, and the discharged water can be reused for grinding, cleaning and other procedures in a workshop.

Description

technical field [0001] The invention relates to a treatment and reuse method of shock-light wastewater and its application. Background technique [0002] Shock light refers to the use of grinding stones (high alumina porcelain, ceramics, high frequency porcelain, plastic stone, etc.) and grinding aids (grinding fluid, brightener, cleaning agent, rust inhibitor, wax removal water) , so that the surface of the metal workpiece can be bright and smooth. Shocking wastewater refers to the wastewater generated during the shocking process, with complex components, including grinding aids, heavy metals, grinding stone particles, etc. [0003] Before nickel-plating and chrome-plating of high-carbon steel tools, it is necessary to use shock technology to make metal tools achieve surface polishing, de-blinding, chamfering, deburring, rust removal, rough polishing, precision polishing, gloss polishing, and electroplating. For the purpose of fine grinding and excellent vibration, etc., ...

AI Technical Summary

Problems solved by technology

[0005] 1) The existing treatment process is mainly aimed at comprehensive wastewater containing heavy metals. For the treatment of seismic wastewater, it is difficult for Ni ions to reach below 0.1mg / L;

[0006] 2) For the grinding stone in the Zhenguang wastewater, the solid particles are large, fine and uniform, in a suspended state, without charge, and ordinary coagulants and flocculants cannot remove these solid particles;

[0007] 3) A large number of heavy metal removers are used in the existing process, which is easy to cause secondary pollution and increase the amount of sludge;

[0008] 4) The existing process cannot completely and effectively break the network, and the refractory organic matter remains in the discharged water, causing pollution to the receiving water body, failing to meet the recycling standard, and cannot continue to be used in the workshop

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