A kind of electroless plating comprehensive wastewater treatment method

Abstract

A chemical plating comprehensive wastewater treatment method, comprising the following steps: (1), wastewater removal of oil slicks and suspended solids; (2), wastewater oxidation; (3), sand filtration; (4), ion exchange; (5), Water quality adjustment: the wastewater treated in steps 1 and 4, blackened water and domestic sewage are aerated in the adjustment tank for 16-24h; (6), AO process; (7), contact oxidation: the wastewater treated by the AO process enters In the contact oxidation tank, the blower provides aeration, and the wastewater reacts in the contact oxidation tank for 12‑15 hours; (8), sedimentation filtration; (9), sludge treatment. In the present invention, each strand of production wastewater is subjected to qualitative pretreatment to remove one type of pollutants, reduce the water quality concentration of the treated raw water, greatly reduce the difficulty of treatment, reduce the operating cost, stabilize the wastewater treatment effect, and reduce the pollution to the environment. The economic benefits are huge.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a chemical plating comprehensive waste water treatment method. Background technique [0002] In the electroless plating of hydraulic prop production, the wastewater produced is mainly blackening water (other production wastewater not containing nickel), pre-plating cleaning wastewater, post-plating cleaning wastewater (low concentration nickel-containing wastewater mixed with cleaning wastewater), intermittent discharge The electroless plating waste liquid (high concentration nickel-containing wastewater) and the domestic sewage in the factory area have the following water quality characteristics: ① Both the cleaning wastewater before and after plating and the electroless plating waste liquid contain the first type of pollutant nickel, and the remaining main pollutants are conventional pollutants. That is COD (chemical oxygen demand), BOD (biological oxygen demand), SS (suspended solids),...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a kind of electroless plating comprehensive wastewater treatment method, which can effectively solve the problems of high pollutant index, poor biodegradability and large environmental pollution of electroless plating wastewater.

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