Electroplating wastewater treatment device and method

Abstract

The invention discloses a high-efficiency treatment device and method for electroplating wastewater. Microwave high-temperature modified pyrrhotite is used as a filter layer filler to efficiently remove various heavy metal ions in wastewater, and pyrrhotite produces iron ions for electric Fenton reaction. Supplemented by microporous aeration as an electric Fenton gas source, liquid phase mass transfer efficiency and oxidant production are increased, and organic pollutants in wastewater are rapidly oxidized and decomposed without adding additional oxidant or iron ions. The treatment effluent enters a clear water tank after coagulating sedimentation, and the water quality meets the national Electroplating Pollutant Emission Standard (GB21900-2008). The device of the invention is an integrated portable device. The required raw materials are recycled waste resources. In addition, the invention has application advantages of good environmental friendliness and low cost. The technology of treating the electroplating wastewater can realize the synergistic and efficient removal of heavy metals and organic pollutants, has advantages of high reaction speed and stable treatment performance, and is suitable for the treatment of various electroplating wastewaters.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an electroplating sewage treatment device and method. Background technique [0002] Electroplating is a surface engineering technology for decorating, protecting and obtaining some special properties on the substrate surface. The electroplating industry will cause high pollution to the environment. With the development of science and technology, the scale of the electroplating industry will also develop, and the amount of wastewater discharged will also increase. Electroplating wastewater not only has high pollutant concentration and complex composition, but also has great changes in water quality. It contains heavy metal ions such as chromium, copper, nickel, cadmium, zinc, and pollutants such as cyanide, petroleum substances, animal and vegetable oils, and surfactants. Sanzhi" is a toxic substance that is very harmful to human health. Due to the toxic acc...

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Problems solved by technology

However, when the physical method is used, it has the disadvantages of expensive equipment, high technical requirements, and difficult operation and management.

The biological method is to use the metabolism of microorganisms to convert the dissolved organic pollutants in the electroplating wastewater into small molecules and non-toxic substances to achieve purification. However, the disadvantages of difficult microorganisms to survive and long treatment cycles are extremely limited. its application in industry

In addition, due to the presence of a large amount of organic solvents and heavy metal toxic substances in electroplating wastewater, conventional wastewater treatment methods can no longer meet the treatment requirements, and the water quality of most electroplating enterprises cannot meet the national "Electroplating Pollutant Discharge Standard" (GB21900-2008)

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