Processing method of electroplating waste water

Abstract

The invention discloses a processing method of electroplating waste water. The processing method of electroplating waste water comprises a following step: electrocatalytic oxidation is adopted for processing of electroplating waste water raw water. The beneficial effects are that: technology is simple, and control and operation are convenient.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a treatment method for electroplating wastewater. Background technique [0002] The composition of electroplating wastewater is very complex. In addition to cyanide (CN) wastewater, heavy metal wastewater and acid-base wastewater, there is also organic wastewater (COD), which is a very harmful category of wastewater. With the rapid development of the electroplating industry and the increasing requirements for environmental protection, the treatment of electroplating wastewater has entered the stage of clean production technology and total volume control. Resource recycling and closed-circuit circulation will be the main direction of development. [0003] At present, most of the treatment methods of electroplating wastewater are chemical precipitation, electrolysis, etc., and the heavy metals and COD in the effluent are difficult to meet the standards. Electropla...

AI Technical Summary

Problems solved by technology

Electroplating sludge is hazardous waste, which will lead to a substantial increase in comprehensive treatment costs

[0007] On the other hand, in the Fenton oxidation process, acid-base adjustments are required multiple times, so the process is complex and requires continuous operation by staff, resulting in high labor costs.

[0008] In addition, the traditional electrical "catalytic oxidation" technology has many defects: the first is the use of flat electrodes, which require high current density and high energy consumption; the second is the use of iron plates as electrodes, and the removal of organic matter is only limited Relying on adsorption, the oxidation ability of organic matter is poor; the third is to increase the catalytic activity by adding catalyst filler between the cathode and anode or making the anode into a three-dimensional structure, but the manufacturing cost of this structure is high, and the electrode surface is easily polluted Adhesion and blockage of substances, resulting in failure of catalytic activity