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Method for treating electroplate rinsing wastewater

A waste water treatment and rinsing technology, applied in water/sewage multi-stage treatment, light water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex treatment process, poor operation stability and high operation cost, and achieve The system is easy to operate, occupies a small area, and has the effect of short payback period

Inactive Publication Date: 2011-04-20
广州凯膜过滤设备有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] A method for treating electroplating and rinsing wastewater of the present invention overcomes the shortcomings of the existing traditional process of electroplating wastewater treatment, such as complex technical treatment procedures, poor operation stability, and high operating costs, and proposes an improved membrane separation method for treating electroplating and rinsing wastewater. , under the condition of low energy consumption, the separation and purification of electroplating rinsing wastewater is realized, the high-multiple concentrated solution containing heavy metal ions is returned to the electroplating tank, and the dialysate is returned to the primary washing tank, realizing the purpose of zero discharge of wastewater

Method used

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  • Method for treating electroplate rinsing wastewater
  • Method for treating electroplate rinsing wastewater
  • Method for treating electroplate rinsing wastewater

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Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1: (1) the nickel electroplating rinsing water collected by a certain electroplating enterprise is regulated and processed by PH6.5-7.5;

[0026] (2) High-efficiency fiber filtration: perform high-efficiency fiber filtration on the electroplating rinsing wastewater with adjusted pH value to remove particles, macromolecular organic matter, and active additive flocculation lumps with a particle diameter of more than 10-4mm suspended matter in the electroplating rinsing wastewater Finally, the pollution index (SDI) of the filtered water is controlled below 5.

[0027] (3) Photocatalytic reaction: through the ultraviolet sterilizing effect, the filtered wastewater is sterilized and algae-killed, and COD, TOC, and organic matter are reduced, so that it is not easy to form organic matter pollution on the surface of the membrane, and delay the blockage caused by organic matter pollution of the membrane element. Irreversible cleaning with reduced water flux.

[0028...

Embodiment 2

[0034] Embodiment 2: repeat the operation steps of embodiment 1, the nickel ion content in the dialysate after the ultrafiltration filtration system is 60mg / L. The concentration of nickel ions treated by the reverse osmosis membrane integrated process system is 1199.64 mg / L, and the concentration factor is 20 times (see Table 2).

[0035]

[0036] Table 2: Experimental data of nickel ion concentration of 60 mg / L in ultrafiltration dialysate

Embodiment 3

[0037] Embodiment 3: Repeat the operation steps of Embodiment 1, the nickel ion content in the dialysate after the ultrafiltration filtration system is 150mg / L. The concentration of nickel ions treated by the reverse osmosis membrane integrated process system is 2999.22 mg / L, and the concentration factor is 20 times (see Table 3).

[0038]

[0039] Table 3: Experimental data of nickel ion concentration in ultrafiltration dialysate at 150mg / L

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Abstract

The invention provides a method for treating electroplate rinsing wastewater, mainly comprising the following steps: (1) classification and collection of electroplate rinsing water; (2) efficient fiber filtration; (3) light-catalyzed reaction; (4) ultrafiltration (UF) by a filtering system; (5) membrane filtration by a reverse osmosis (RO) system; (6) separation of dialysis fluid by an RO membrane and recovery of the dialysis fluid in a finished-product water tank; and (7) separation of strong liquor recovery by an RO membrane and recovery. The method for treating the electroplate rinsing wastewater is used to realize wastewater recycling, reduce the rinsing water usage amount, achieve the zero emission requirement of the wastewater, and decrease the scale of biochemical and physical treatment; the method for treating the electroplate rinsing wastewater is beneficial to the expansion requirement of enterprises, and is used to recycle useful metal ions, thus leading the enterprises to generate benefits at the same time of achieving the purpose of being environment-friendly; and the system is convenient for operation, and occupies less area.

Description

technical field [0001] The invention relates to the technical field of electroplating wastewater treatment, in particular to a method for treating electroplating rinsing wastewater using membrane technology. Background technique [0002] Electroplating is one of the three major polluting industries in the world today. According to statistics, the national electroplating industry discharges about 4 billion cubic meters of electroplating wastewater every year, which is equivalent to the tap water supply of several large and medium-sized cities, seriously exacerbating the shortage of water resources. The electroplating water consumption is large and the electroplating rinsing water is seriously polluted, which leads to the unsustainable development of the electroplating industry. Now countries are scrambling to develop water resource reuse technology to solve the shortage of water resources and environmental pollution. However, these traditional technologies mainly use ion ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/32C02F1/44
Inventor 刘宏国蔡慧明
Owner 广州凯膜过滤设备有限公司
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