Method for recycling and treating electroplating wastewater

Abstract

The invention discloses a method for recycling and treating electroplating wastewater. The method comprises a nickel-containing wastewater treatment technology, a chromium-containing wastewater treatment technology, a cyanogen-containing wastewater treatment technology, a comprehensive wastewater treatment technology and a wastewater recycling and treatment technology. According to the method disclosed by the invention, heavy metal ions and organic pollutants in the electroplating wastewater are effectively removed by adopting a technology combining physical chemistry, electrochemistry, physical filtering, membrane separation and the like, so that the electroplating wastewater is efficiently recycled and utilized; pollution and dangers, caused by the fact that the electroplating wastewateris discharged, to the peripheral ecological environment are avoided; the method disclosed by the invention is reasonable in design, the recycling rate of the electroplating wastewater is improved, and energy saving and emission reduction are saved.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a recycling treatment method for electroplating wastewater, and belongs to the technical field of electroplating wastewater treatment. Background technique [0002] The electroplating surface cleaning process will produce acid-base wastewater, and the electroplating process will produce wastewater containing heavy metals and wastewater containing cyanide. Electroplating wastewater has the characteristics of complex water quality, strong acidity and alkalinity, high heavy metal content, strong toxicity, and poor biodegradability. Electroplating wastewater can be divided into the following categories: [0003] Nickel-containing wastewater: mainly from the cleaning water of chemical nickel plating, rack nickel plating and other processes, the main pollutants are nickel chloride, nickel sulfate, phosphoric acid, complexes, ammonia nitrogen, etc.; [0004] Chromium-containing wastewat...

AI Technical Summary

Problems solved by technology

[0011] At present, the treatment methods for nickel-containing wastewater, chromium-containing wastewater, cyanide-containing wastewater and comprehensive cleaning wastewater in electroplating wastewater are unreasonable and cannot be treated uniformly, and heavy metal ions and organic pollutants in electroplating wastewater cannot be effectively removed, resulting in electroplating wastewater The recycling rate is very low, the discharge volume increases, the energy consumption is large, and the discharge of the treated electroplating wastewater is very harmful and polluting to the surrounding ecological environment.

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