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A method of electroplating wastewater treatment and an electroplating wastewater treatment device

A technology for electroplating wastewater and treatment devices, which is applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. It can solve the problems of ineffective treatment of organic matter and ammonia nitrogen, difficult treatment, and unstable treatment effect and other problems, to achieve the effect of high degree of automation, lighten the pressure on site, and low investment cost

Active Publication Date: 2017-11-14
SHENZHEN POLYTECHNIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for treating electroplating wastewater and an electroplating wastewater treatment device, aiming at solving the difficulties of traditional processes, the unstable treatment effect, and the inability to effectively treat pollutants such as organic matter and ammonia nitrogen. Dealing with the problem

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  • A method of electroplating wastewater treatment and an electroplating wastewater treatment device

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Embodiment 1

[0057] The water quality of comprehensive electroplating wastewater in a factory is: pH value 1.8~3.4, suspended solids SS concentration 5~100mg / L, COD concentration 200~850mg / L, Cu concentration 57~194mg / L, Ni concentration 35~210mg / L, The Cr concentration is 15~90mg / L, the Zn concentration is 10~85mg / L, and the ammonia nitrogen concentration is 3~12mg / L.

[0058] Using the above figure 1 The electroplating wastewater treatment device is used for treatment, and the adjustment range of the pH value in the first adjustment tank 4 is 9.4~10.6; the flocculant is polyaluminum chloride (PAC), and the dosage concentration is 1.5~4mg / L (calculated as Al); The reflux ratio of light sludge is 10~15%; the submerged flat membrane is used, and the membrane flux is 1m 3 / (m 2 · d), the operating transmembrane pressure difference is -8~-20kPa; the adjustment range of the pH value in the second adjustment pool 17 is 6.7~7.3.

[0059] After treatment, the pH of the effluent is 7.1~8.3, the...

Embodiment 2

[0061] The water quality of electroplating comprehensive wastewater in a factory is: pH value 1.5~2.7, suspended solids SS concentration 5~100mg / L, COD concentration 200~650mg / L, Cu concentration 45~187mg / L, Ni concentration 25~190mg / L, The Cr concentration is 15~75mg / L, the Zn concentration is 10~100mg / L, and the ammonia nitrogen concentration is 2~8mg / L.

[0062] Using the above figure 1 The electroplating wastewater treatment device is used for treatment, and the basic parameters are similar to those in Example 1. After treatment, the pH of the effluent is 7.1~8.3, the concentration of suspended matter SS is 0.5~5mg / L, the concentration of Cu is 0.07~0.19mg / L, and the concentration of Ni is 0.02~ 0.08mg / L, Cr concentration 0.15~0.27mg / L, Zn concentration 0.05~0.22mg / L, ammonia nitrogen concentration<1.5mg / L, the effluent basically reaches Class V in the "Surface Water Environmental Quality Standard" (GB3838-2002) Water requirements. After the comprehensive electroplating ...

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Abstract

The invention discloses a method for treating electroplating wastewater and an electroplating wastewater treatment device. In the present invention, the pH of the electroplating cleaning water is adjusted first, so that the heavy metals in it form corresponding hydroxide particles, and then the particle size growth of the sludge particles is realized through the flocculant, and the flocculation and separation of large particles and small particles are completed in the comprehensive pool. The membrane retains residual hydroxide particles and macromolecular organic matter, and then enters the second pH adjustment tank through the submerged membrane, and finally enters the BAF filter to remove organic matter and ammonia nitrogen and other pollutants in the water. The invention has simple process steps, short reaction time, low input cost, high processing efficiency, high degree of automation, no need for tedious operations, reduced on-site pressure, and can not only control the discharge of heavy metal pollutants, but also control the discharge of pollutants such as organic matter and ammonia nitrogen. Discharge, so that the water quality can reach the standard of Class V water body in the "Environmental Quality Standards for Surface Water" (GB3838‑2002).

Description

technical field [0001] The invention relates to the technical field of heavy metal-containing wastewater treatment, in particular to a method for treating electroplating wastewater and an electroplating wastewater treatment device. Background technique [0002] The electroplating industry is a large water consumer and produces a large amount of waste water containing heavy metals, which is a heavy polluting industry. But from some perspectives, the development of modern industry is inseparable from the supporting role of electroplating technology, and the electroplating industry is indispensable in industrial development. [0003] The electroplating wastewater mainly comes from the electroplating washing wastewater, passivation wastewater, pickling wastewater, waste electroplating solution and ground flushing water generated during the electroplating process, as well as the "running, running, dripping, and leaking" caused by poor operation or management. waste water. The c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 朱佳范小江高静思陈丽婷
Owner SHENZHEN POLYTECHNIC