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Coupling process of nanofiltration membrane

A technology of nanofiltration membrane and process, applied in the field of coupling process, can solve problems such as insufficient theory and practice

Inactive Publication Date: 2010-03-31
杜小青
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some research results have been obtained in the study of suspended photocatalytic coupled membrane reactors at home and abroad, there are still relatively large theoretical and practical deficiencies in the selection of specific coupling separation membranes in suspended photocatalytic membrane reactors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0005] The photocatalytic degradation experiments of target pollutants under different pH conditions were carried out in a suspended photocatalyst (sequencing batch). 3mL samples were taken every 10min for analysis to determine the type and quantity of the Cu-modified photocatalyst on the target intermediate product and determine the optimal pH operating conditions.

[0006] The mass fraction of Cu modified photocatalyst is 0.1%, the mass concentration of dissolved oxygen is 20-25mg / L, and the mass concentration of Atrazine is 25mg / LUV radiation intensity is 15mW / cm2. Under static conditions, after the adsorption process of the pollutants by the catalyst reaches equilibrium (2h), turn on the ultraviolet light source (preheat for 30min to make it reach a stable state), control the pH conditions to be 3.0, 5.5, 6.5, 9.0 and 11.5 respectively, and control the reaction temperature to (20±1)°C.

[0007] The main intermediate products produced by the degradation of Atrazine using m...

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Abstract

The invention discloses a coupling process of a nanofiltration membrane, wherein the mass fraction of a Cu modified photocatalyst is 0.1 percent, the mass concentration of dissolved oxygen is 20-25mg / L, the mass concentration of Atrazine is 25mg / L, and the UV radiation intensity is 15mW / cm2. The coupling process comprises the following steps: under the static conditions, leveling off the adsorption process of pollutants from the catalyst to be 2h, then opening an ultraviolet light source, preheating for 30min so as to reach a stable state, and controlling the pH condition to be 5.5 and the reaction temperature within 20 plus or minus 1 DEG C.

Description

technical field [0001] The invention relates to a coupling process, in particular to a nanofiltration membrane coupling process. technical background [0002] In recent years, the coupling of photocatalytic technology and membrane separation technology has gradually become a research hotspot among scholars at home and abroad. Poor water separation effect, high cost and inability to realize continuous operation are the most prominent technical defects of suspension photocatalysts. However, the membrane separation technology is coupled with the photocatalytic reaction, and the fine separation ability of the separation membrane is used to separate and recover the granular photocatalyst. , not only the separation effect is thorough, the loss of photocatalyst is less, but also the operation is simple, the cost is low, and it is easy to realize the modeling of the process; at the same time, the separation membrane can also separate different reaction intermediate products and reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/32B01J23/72
Inventor 杜小青
Owner 杜小青