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Membrane separation method of zero discharge of electroplating waste water treatment

A technology for electroplating wastewater and membrane separation, which is used in water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. problem, to achieve the effect of high economic value

Inactive Publication Date: 2005-03-09
HANGZHOU WATER TREATMENT TECH RES & DEV CENT NAT BUREAU OF OCEANGRAPHY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the ion exchange method, the ion exchange resin needs to be regenerated or transformed with acid and alkali after adsorption and saturation. The regeneration requires a large amount of acid and alkali chemical raw materials. The treatment cost is high, the process requirements are complicated, and the resin is easily broken during use. make its app promotion affected
In the ion exchange method, the water after resin treatment still has the problem of salt accumulation, and the reuse of salt water as rinsing water has an adverse effect on the quality of the plated parts. Purity and Concentration
[0006] In short, although the existing mainstream processing methods are widely used, many problems still exist

Method used

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  • Membrane separation method of zero discharge of electroplating waste water treatment
  • Membrane separation method of zero discharge of electroplating waste water treatment
  • Membrane separation method of zero discharge of electroplating waste water treatment

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Experimental program
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Effect test

Embodiment 1

[0031] Embodiment 1: electroplating nickel wastewater treatment

[0032] 1. Pretreatment

[0033] Firstly, the wastewater stock solution is taken from the electroplating nickel wastewater pool, raised to the wastewater tank 1, then boosted to 0.4Mpa by the booster pump 2, and filtered under pressure by using a 10 μm bag filter 3, and the anode slime, Larger suspended impurities such as foam fragments are filtered out; then the activated carbon fiber filter 4 is used to absorb the petroleum organic matter in the wastewater by using its carbon fiber to reduce the pollution of the organic matter to the membrane element; The organic microfiltration membrane with a high pore size of 5 μm further filters the wastewater and removes fine suspended solids in the wastewater, thereby protecting the membrane elements and prolonging the service life of the membrane elements. In order to prevent the generation of Ni(OH) during concentration 2 Precipitation, adjust the pH value of the rins...

Embodiment 2

[0043] Example 2: 50m 3 / h Electroplating Nickel Wastewater Treatment and Recycling

[0044] The water intake of the design system is 50m 3 / h, choose the pretreatment bag filter with a pore size of 10um. The nickel electroplating wastewater is first filtered through the bag, and the large suspended particles in the wastewater will be removed, and then filtered by activated carbon. Activated carbon fiber filter element is used in the activated carbon filter, and finally the waste water passes through a 5um precision filter. The pretreated nickel electroplating wastewater is pre-concentrated through the nanofiltration membrane treatment system.

[0045] The first-stage nanofiltration NF concentration system adopts roll-type NF membrane modules with a water intake of 50m 3 / h, divided into two groups A and B, each group operates independently. The wastewater is concentrated 10 times after the first stage of nanofiltration, and the membrane concentrate is 5m 3 / h is used as ...

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Abstract

A membrane separation method for reclaiming the electroplating sewage includes liqui material treating, lifting, pressurizing and delivering. It features the 3-class membrane separation to remove impurities, organic substances, fine suspended substances, Na ions, heavy metal ions, inorganic ions, etc. the regulation of pH value to prevent deposition of hydroxide, periodical automatic flushing and reuse of treated water.

Description

technical field [0001] The invention belongs to electroplating wastewater treatment, water reuse and heavy metal resource recovery. Specifically, membrane integration technology is used to treat electroplating wastewater, and heavy metals and water resources in wastewater are recovered separately: heavy metals are returned to electroplating tanks or made into heavy metal salts, and water is returned to the production process for rinsing, so as to realize comprehensive resource recovery and electroplating wastewater treatment. zero emission. Background technique [0002] There are more than a dozen treatment methods for electroplating wastewater due to different plating types and electroplating processes. According to "Electroplating and Finishing" 22 (2) (2000) 6, the article "Review of the treatment of electroplating wastewater in my country in the past fifty years", the author Dong Ruiguang; and "Shanghai Electroplating", 2 (1998) 11, the...

Claims

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Application Information

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IPC IPC(8): C02F1/62C02F9/02C02F9/04
Inventor 楼永通罗菊芬王寿根
Owner HANGZHOU WATER TREATMENT TECH RES & DEV CENT NAT BUREAU OF OCEANGRAPHY
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