Treatment method of copper-containing high-salt printing and dyeing waste water

Abstract

The invention discloses a treatment method of copper-containing high-salt printing and dyeing waste water. The treatment method specifically comprises the following steps: S1, grading pretreatment ofall strands of waste water is firstly done well, and the waste water is divided into a plurality of strands; S2, comprehensive production waste water entering a regulating tank regulates the pH (Potential of hydrogen) of the waste water to 2.5-3.5; S3, discharged water of a coagulative precipitation tank, initial rainwater, other low-concentration waste water and domestic sewage in a comprehensiveregulating tank fully homogenize the water quality. The invention relates to the technical field of treatment of the printing and dyeing waste water. The treatment method of the copper-containing high-salt printing and dyeing waste water has the beneficial effects that sewage-cleaning flow division for the high-concentration and low-concentration waste water can be realized, not only is the dosage of an agent reduced and COD (Chemical oxygen demand) effectively removed, but also the biological toxicity of the waste water is reduced, the biodegradability of the waste water is improved, the load of subsequent biochemical treatment is relieved, the operating stability of a biochemical treatment system is enhanced, and all indexes of the treated waste water can meet corresponding standards; the treatment method has the advantages of economy, high efficiency, stable running, simple operation and high automation degree.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a method for treating copper-containing high-salt printing and dyeing wastewater. Background technique [0002] Chemical industry, printing and dyeing, electroplating, nonferrous smelting, nonferrous metal mining, electronic material rinsing wastewater and dye production often produce wastewater containing a large amount of copper ions. According to the valence state of copper ions, there are divalent copper ions and monovalent copper ions. ; According to the existing form, there are free copper (such as Cu2+) and complex copper (such as copper cyanide complex ion [Cu(CN)3]2-, cuproammonia complex [Cu(NH3)42+], etc.), in dyes, In the copper-containing wastewater of electroplating and other industries, copper ions often exist in complex forms, such as copper cyanide complex ions [Cu(CN)2]-, [Cu(CN)3]2-, [Cu(CN)4]3- It is generally believed that co...

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Problems solved by technology

[0008] Aiming at the deficiencies of the prior art, the present invention provides a treatment method for copper-containing high-salt printing and dyeing wastewater, which solves the problem that the existing copper-containing high-salt printing and dyeing wastewater has various types, complex components, high COD, intermittent discharge of wastewater, and fluctuations in water quality and quantity. Larger, impact load, high content of refractory organic matter in wastewater, high toxicity, environmental pollution and difficult treatment

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