Electric flocculation and membrane separation water treatment device, treatment method and application of device

A technology of water treatment device and treatment method, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems such as the unification of electrocoagulation and membrane technology, and achieve good results Synergistic effect, optimization of membrane surface properties, effect of shortening the process flow

Inactive Publication Date: 2015-07-22
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the short process of "electrocoagulation-membrane separation" has become a global research hotspot, but so far, there has been no integration of electrocoagulation and membrane technology into the same reaction unit, so as to optimize the effluent of electrocoagulation and slow down the increase of membrane fouling. Research Report on Membrane Utilization Efficiency

Method used

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  • Electric flocculation and membrane separation water treatment device, treatment method and application of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Drinking water is treated

[0037] The TOC content in the drinking water to be treated is 15-16ppm.

[0038] The process is as follows:

[0039] (1) Pass the drinking water waste water from the water inlet 2, start the electrochemical device, and set the current density to 250A / cm 2 , the electric field strength is 55V / cm, the pressure is 75kPa, and the electrocoagulation process is carried out;

[0040] (2) After electrocoagulation for a period of time, start the suction filter pump for membrane filtration;

[0041] (3) Adjust the flow rate of the water outlet 7 of the water collection pipe to 325L / (h×m 2 ), monitor the concentration of pollutants in the outlet water of the water collection pipe outlet 7 until the outlet water reaches the standard.

[0042] After testing, the TOC content in the water effluent from the outlet 7 of the water collection pipe obtained after treatment is about 0.5 ppm, and the separation efficiency of pollutants is 95%.

[0...

Embodiment 2

[0044] Embodiment 2: Industrial sewage is processed

[0045] The TOC content in the industrial sewage to be treated is 18-20ppm.

[0046] In addition to setting the current density in step (1), the processing process is 350A / cm 2 , the electric field intensity is 76V / cm, and the pressure is 90kPa. In step (3), the flow rate of water outlet 7 of the water collecting pipe is adjusted to be 300L / (h×m 2 ) except that other processes are the same as in Example 1.

[0047] After testing, the TOC content in the water effluent from the outlet 7 of the water collection pipe obtained after treatment is less than 1ppm, and the separation efficiency of pollutants is 94.9%.

Embodiment 3

[0048] Embodiment 3: Industrial sewage is processed

[0049] The TOC content in the industrial sewage to be treated is 10-15ppm.

[0050] In addition to setting the current density in step (1), the processing process is 500A / cm 2 , the electric field intensity is 100V / cm, and the pressure is 90kPa. In step (3), the flow rate of water outlet 7 of the water collecting pipe is adjusted to be 340L / (h×m 2 ), other processes are the same as in Example 1.

[0051] After testing, the TOC content in the effluent water from the outlet 7 of the water collection pipe obtained after treatment is about 0.5 ppm, and the separation efficiency of pollutants is 95.1%.

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Abstract

The invention provides an electric flocculation and membrane separation water treatment device, a treatment method and an application of the device. The device comprises a device body (1), wherein a water inlet (2) is arranged on one side of the bottom of the device body (1), a water outlet (3) is arranged on one side, opposite to the side where the water inlet (2) is located, of the top of the device body (1), a cathode plate (4), an anode plate (5) and a membrane assembly (6) are arranged in the device body (1), and a collector pipe water outlet (7) is formed in one side surface of the device body (1). An electric flocculation and membrane technology is organically integrated to the same reaction unit to form an electric flocculation and membrane separation short-process technology; the flocculation form and a floccule structure are controlled under the electrochemical action, the membrane filtration performance is optimized, meanwhile, the membrane surface characteristics are optimized through actions of an electric field effect, electrochemical oxidation and electroflotation, so that electric flocculation effluent quality is improved, the membrane pollution is relieved, and pollutants are removed through the synergistic effect of electric flocculation and membrane separation.

Description

technical field [0001] The invention belongs to the field of drinking water or sewage treatment, and relates to an electrocoagulation-membrane separation water treatment device, a treatment method and an application thereof. Background technique [0002] Electrocoagulation has been a widely studied and widely used electrochemical water treatment technology. By changing the electrochemical parameters and adjusting the reactor structure, the dosage of flocculant, flocculation morphology and floc structure can be adjusted during the electrocoagulation process, thereby affecting the water treatment effect. As the pollution situation continues to intensify and water quality standards become increasingly stringent, electrocoagulation technology often needs to be combined with other water treatment technologies to achieve the purpose of pollutant removal and environmental protection requirements. Membrane separation is often used as an advanced treatment technology in combination ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/06
Inventor 胡承志孙境求刘会娟曲久辉王树青
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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