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Comprehensive electroplating wastewater treatment method

A technology of electroplating wastewater and treatment methods, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of substandard effluent and difficult recovery of heavy metals, and reduce production costs Effect

Active Publication Date: 2014-03-12
SHENZHEN YINTAI ENVIRONMENTAL PROTECTION ENG TECH +2
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Problems solved by technology

[0005] The purpose of the present invention is to provide a comprehensive electroplating wastewater treatment method, in order to solve the problems of substandard effluent and difficult recovery of heavy metals in traditional chemical treatment methods, and realize the discharge of electroplating wastewater up to standard and the classified recovery of heavy metals

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  • Comprehensive electroplating wastewater treatment method
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Embodiment Construction

[0040] Below according to accompanying drawing and example the present invention will be further described:

[0041] An electroplating industrial park in Shenzhen contains various types of electroplating, and its daily sewage discharge is 5,000 tons. The original wastewater treatment process is chemical precipitation method + biochemical treatment method. After the cyanide-containing wastewater undergoes cyanide breaking and the chromium-containing wastewater undergoes chromium reduction, it will be adjusted together with the comprehensive wastewater by adjusting the pH value and adding coagulants, polymer coagulants, etc. Metal ions, suspended solids and COD are removed, and then enter the biochemical pool for aerobic treatment to further remove COD. Make the effluent water quality meet the discharge standard.

[0042] In actual production, the quality of influent water fluctuates greatly in different production stages. For example, in the pretreatment stage of plating part...

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Abstract

The invention relates to a comprehensive electroplating wastewater treatment method. The electroplating wastewater is divided into six brand-new classes, a chemical and biochemical combined process is adopted, a separate system drainage pipe network is adopted, the electroplating wastewater is divided into ink wastewater, complex wastewater, pretreatment wastewater, cyanogen-containing wastewater, chromium-containing wastewater and common electroplating wastewater, the six classes of wastewater respectively flows into respective underground adjusting tank through the pipe network, and is treated by respective process, and the effluent is discharged after reaching a standard. Because of the scientific water separating and stepwise pretreatment of a front-end chemical treatment part, different pollutants are respectively removed in different process sections according to characteristics, crossed enrichment and mutual reaction of the different pollutants are reduced to the greatest extent, and the pressure of microorganisms in the biochemical process is reduced. Treatment facilities for the six classes of wastewater are mutually connected and relatively dependent, and when inlet water quality fluctuates, a corresponding section is only required to be adjusted, the whole process is not influenced, the management is scientific and orderly, and operational risks are reduced.

Description

technical field [0001] The invention belongs to the industrial waste water treatment in the field of environmental protection, and relates to a comprehensive electroplating waste water treatment method, in particular, the electroplating waste water is classified into six new types, and a process combining chemistry and biochemistry is used in the treatment, and precious metals can be recovered. Background technique [0002] Electroplating is a process that uses electrochemical methods to decorate, protect and obtain certain new properties on metal and non-metal surfaces. Comprehensive electroplating wastewater is the synthesis of wastewater discharged from various electroplating workshops. Its pollutant content is high and its components are more diverse. The pollution caused is roughly: pollution of chemical poisons, pollution of organic aerobic substances, pollution of inorganic solid suspended matter and acid , alkali, heat and other pollution and color, foam, oil and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 贺钦育刘然李成王志孙宝盛
Owner SHENZHEN YINTAI ENVIRONMENTAL PROTECTION ENG TECH
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