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Method of diaphragm separation electrolyzing integrated treatment of wate, water containing heavy metal copper

A membrane separation and heavy metal technology, applied in water/sewage treatment, metallurgical wastewater treatment, chemical instruments and methods, etc., can solve the problems of high separation efficiency of membrane separation method, inability to dispose of concentrated liquid, low energy consumption, etc., to avoid environmental problems. Pollution and waste of resources, avoid secondary pollution, good economic benefits

Inactive Publication Date: 2007-08-29
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Membrane separation method has high separation efficiency, low energy consumption, simple equipment, less investment, and will not cause secondary pollution, but the problem is that the concentrate produced by membrane separation method cannot be disposed of

Method used

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  • Method of diaphragm separation electrolyzing integrated treatment of wate, water containing heavy metal copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 2 L of waste water with a Cu concentration of 16.24 mg / L into the settling tank 1, settle by gravity for 24 hours at 20° C., and take the supernatant, which is fed into the micron filter 3 (pore size 5 μm) through the booster pump 2 . The filtered filtrate is injected into the membrane separator 5 through the high-pressure pump 4, and the membrane in the membrane separator is GE company DL polyvinyl alcohol and polypiperazine amide hybrid composite nanofiltration membrane, and the membrane molecular weight cut-off is 150~300 Dalton (Dalton ), membrane flux 28L / m 2 h, the filtrate flow rate is 1L / min, at 20°C and 0.6MPa, after membrane separation for 15 hours, the measured Cu concentration in the concentrate is 137.83mg / L, and the Cu concentration in the permeate is 6mg / L, Cu concentration The multiple is 8.49 times, the interception rate of Cu by the nanofiltration membrane is greater than 90%, and the permeate after membrane separation is reused in the production p...

Embodiment 2

[0020] The method of this embodiment is the same as that of Example 1, and the effect of treating wastewater with different nanofiltration membranes is specifically investigated.

[0021] Add 2 L of waste water containing Cu concentration of 16.24 mg / L into the settling tank 1, and settle by gravity for 24 hours at 20° C. to take the supernatant, which enters the micron filter 3 (pore size 5 μm) through the booster pump 2 . The filtered filtrate is injected into the membrane separator 5 through the high-pressure pump 4, and the membrane in the membrane separator is a composite nanofiltration membrane of GE company DK polyvinyl alcohol and polypiperazine amide, and the molecular weight cut-off of the membrane is 150~300 Dalton (Dalton ), membrane flux 18L / m 2 h, the filtrate flow rate is 1L / min, at 20°C and 0.6MPa, after membrane separation for 15 hours, the Cu concentration in the concentrate is measured to be 119.46mg / L, and the Cu concentration in the permeate is 3mg / L. The...

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Abstract

The invention discloses a method used membrane separating-electrolyzing integration to process heavy metal copper containing waste water. It includes the following step: gravity setting, micron filtering, and membrane separating. The concentrated solution is poured into the electrolytic reactor after pH value regulating to deposit heavy metal copper on its negative pole board by energizing to reduce. The residual liquid can be reused in the production technology. The invention can reclaim the metal copper from the heavy metal copper containing waste water, realize water resource reuse. In addition, it has simple device, convenient operation, high recovery ratio, comprehensive utilization ratio, good economic benefit.

Description

technical field [0001] The invention relates to a method for membrane separation-electrolysis integrated treatment of wastewater containing heavy metal copper, which belongs to the treatment technology of wastewater containing heavy metal. Background technique [0002] Heavy metal copper-containing wastewater mainly comes from wastewater discharged from smelting, electroplating, chemical, dye, ink manufacturing, papermaking, tanning, pharmaceutical, textile, fertilizer, oil refining and other enterprises, especially the electroplating industry, which has a large amount of heavy metal copper-containing wastewater. Copper electroplating wastewater is generally acidic or alkaline, containing heavy metal copper ions and organic additives that are difficult to biodegrade, which poses serious environmental and biological hazards. Traditional methods for treating heavy metal copper-containing wastewater mainly include coagulation, adsorption, chemical precipitation, electrolysis, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/00C25C1/12C02F101/20C02F103/16
CPCY02P10/20
Inventor 王志王纪孝麻丽峰樊智锋
Owner TIANJIN UNIV
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