Treatment method for removing zinc in electroplating wastewater

Abstract

The invention discloses a treatment method for removing zinc in electroplating wastewater. The wastewater is sequentially subjected to the treatment of a water collecting well, a coarse bar screen, a primary settling pool, a pH value regulating pool, a pulse high-voltage-electricity microbiological flocculation reaction pool, an aeration oxidation pool, a biological denitrification pool, a secondary settling pool and a water purifying pool. The method has the advantages that the microbial flocculation features of common beer yeast and bacillus licheniformis are creatively utilized; through the specific peak voltage value pulse high-voltage discharging process, the adsorption bridging features of the beer yeast and the bacillus licheniformis on zinc ions are excited, so that the zinc ions in the wastewater take a flocculation reaction on the microorganism surface; flocculates with great diameter are gradually formed, and are finally removed through the precipitation process. Meanwhile, the beer yeast and the bacillus licheniformis are common microorganisms, and can be easily obtained, so that the cost is low, and the material cost of wastewater treatment can be greatly reduced.

Description

technical field [0001] The invention relates to a treatment method for removing zinc ions in electroplating wastewater, which belongs to the field of wastewater treatment in environmental protection. Background technique [0002] With the rapid development of industrial production, heavy metal pollution in water is becoming more and more serious, among which zinc is one of the toxic pollutants in electroplating wastewater. After being directly discharged into the environment without treatment, zinc-containing wastewater can circulate through the food chain, reach a certain concentration level in some organisms, and eventually accumulate in the human body and endanger human health. Therefore, the development of economical and effective methods to control heavy metal pollution such as zinc has become an important content of current water pollution control, and more and more people pay attention to it. Methods for treating heavy metal pollution such as zinc in electroplating w...

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Problems solved by technology

Compared with the chemical precipitation method, the electrolysis method has the advantages of short cycle, low operating cost, and low energy consumption, which is beneficial to the recovery of zinc and salvage ineffectiveness, but the anode material iron consumes a lot and occupies a large area

[0008] At present, the existing zinc-containing electroplating wastewater treatment methods have the disadvantages of high cost, low efficiency, high energy consumption and secondary pollution.

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