Comprehensive electroplating wastewater treatment method
A technology for electroplating wastewater and treatment methods, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of substandard effluent and difficult recovery of heavy metals, and reduce production costs. Effect
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[0040] Below according to accompanying drawing and example the present invention will be further described:
[0041] An electroplating industrial park in Shenzhen contains various types of electroplating, and its daily sewage discharge is 5,000 tons. The original wastewater treatment process is chemical precipitation method + biochemical treatment method. After the cyanide-containing wastewater undergoes cyanide breaking and the chromium-containing wastewater undergoes chromium reduction, it will be adjusted together with the comprehensive wastewater by adjusting the pH value and adding coagulants, polymer coagulants, etc. Metal ions, suspended solids and COD are removed, and then enter the biochemical pool for aerobic treatment to further remove COD. Make the effluent water quality meet the discharge standard.
[0042] In actual production, the quality of influent water fluctuates greatly in different production stages. For example, in the pretreatment stage of plating part...
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