Three-level polyaluminium chloride coagulation treatment method for electro-polishing wastewater

A technology of polyaluminum chloride and electrolytic polishing, which is applied in metallurgical wastewater treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve problems such as difficult to achieve satisfactory TP treatment effect, endanger the health of surrounding residents, and affect industrial and agricultural production.
CN102642901AInactive Publication Date: 2012-08-22南京特克赛环保科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
南京特克赛环保科技有限公司
Publication Date
2012-08-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a three-level polyaluminium chloride coagulation treatment process for stainless steel electro-polishing wastewater. By multilevel coagulation treatment, sewage enters an advanced treatment system or is discharged with standards. The test results show that when the three-level polyaluminium chloride coagulation treatment method is adopted for treating high-concentration phosphor-containing electro-polishing wastewater, the concentrations of total phosphorous (TP), chemical oxygen demand (COD) and total chromium (total Cr) in the effluent can respectively reach 0.46, 120 and 0.15 mg / L, and the removal rates are respectively 99.94%, 88.5% and 99.6%. The three-level polyaluminium chloride coagulation treatment method has the characteristics that the operation is simple, various heavy metal ions, COD and TP can be efficiently removed at the same time, and the like; and the three-level polyaluminium chloride coagulation treatment method is also applicable to treating other like high-concentration phosphor-containing wastewater.
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Description

technical field

[0001] The invention relates to a treatment process for stainless steel electrolytic polishing wastewater, in particular to a method for coagulating wastewater containing high-concentration phosphorus by using a three-stage PAC. Background technique

[0002] At present, the main process of electrolytic polishing (ECP) is degreasing-water washing-rust removal-water washing-electropolishing-water washing-neutralization-water washing-passivation-packaging, and these processes will produce pollution with high concentrations of phosphorus and heavy metal chromium Once the wastewater is directly discharged into the natural water, it will cause eutrophication of the water body, affect industrial and agricultural production, damage the ecological environment, and even endanger the health of the surrounding residents. Therefore, the effective treatment of electrolytic polishing wastewater is of great significance.

[0003] Since electropolishing wastewater is rich in ...

Claims

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