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Integrated processing technique for waste water in breadboard production

A technology for the production of waste water and treatment process, which is applied in metallurgical waste water treatment, neutralized water/sewage treatment, reduced water/sewage treatment, etc. It can solve the problems that the discharge cannot be stably up to the standard, and it is not as good as the treatment of electroplating waste water.

Inactive Publication Date: 2007-10-17
深圳市宇力科技有限公司
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AI Technical Summary

Problems solved by technology

Many circuit board manufacturers have long been Cu 2+ and COD can not be discharged stably and meet the standards. There are far less treatment engineering specifications and monographs in this area than electroplating wastewater treatment.

Method used

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  • Integrated processing technique for waste water in breadboard production

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Embodiment Construction

[0123] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0124] According to the characteristics of the circuit board production process, the waste water can be divided into cyanide waste water, nickel waste water, copper waste water, ink stripping and development waste water, high COD waste water, silver waste water and general washing water according to the nature of the waste water. The waste water is collected separately and specially treated. The specific treatment process is as follows:

[0125] After the nickel-based wastewater is collected and added with a nickel-removing agent for chemical coagulation and precipitation, the concentration of nickel can be effectively controlled below 1.0 mg / l, and it can be directly discharged to the discharge outlet.

[0126] After the silver-based wastewater is collected, add NaOH to adjust the pH value to about 9, and then add PAC, PAM, Na 2 After chemical coagulation and pr...

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Abstract

The invention relates to an efficient process technology for processing plenty of waste water generated in circuit board production, in particular to a pretreatment technology of high copper waste water and difficult biochemical degradation waste water with high COD in the process technology and entire waste water processing technology. First, sorting waste water reasonably according to nature thereof, dividing into as gold thread cyanogen waste water, nickel waste water, silver waste water, copper waste water, peel ink development waste water, high COD waste water and general aqueous washing water, collecting and specially processing the seven kinds of waste water independently, which key technology is the pretreatment technology for copper waste water, peel ink development waste water and high COD waste water. For copper, the key of waste water processing lies in to break complex compound and prevent secondary complexation of remnant Cu2+ and EDTA when adjusting pH to alkaline value; the key of peeling ink development waste water and high COD waste water lies in the foundation that carries out electrocatalysis oxidize to remove partial CODs, on with raise BOD / COD ratio thereof to improve biochemicalness radically.

Description

technical field [0001] The invention relates to an environmentally friendly wastewater treatment process, in particular to wastewater classification, high Cu 2+ The key treatment process for wastewater and high-concentration biodegradable organic wastewater. Background technique [0002] With the rapid development of the electronic product production industry, the output and scale of circuit board production are increasing. Among them, the wastewater discharge of large and medium-sized professional production plants is about 1000T / D~20000T / D. The main pollutant of this kind of wastewater is Cu 2+ Mainly heavy metal ions and organic compounds that are difficult to biodegrade (BOD / COD<10%), while Cu 2+ Due to the existence of a large amount of EDTA (ethylenediaminetetraacetic acid) in the wastewater and in the form of complexes, the chemical stability is very high, which is completely different from the general electroplating wastewater. Many circuit board manufacturers ...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/52C02F1/76C02F1/66C02F1/46C02F1/70C02F103/16
Inventor 周泽宇李建勃蔡德耀卢芬郑原超陈卫周巍包建辉
Owner 深圳市宇力科技有限公司
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