A cation-exchange membrane for electrodialysis treatment of ammonia nitrogen wastewater and its preparation method

A technology of cation exchange membrane and ammonia nitrogen wastewater, which is applied in the field of electrodialysis treatment of cation exchange membrane and preparation of ammonia nitrogen wastewater, can solve the problems of short service life, decline of ammonia nitrogen removal ability and mechanical performance, poor durability, etc., and achieve scale Chemical production, high ammonia nitrogen removal efficiency, and good recycling performance

Active Publication Date: 2021-05-04
ZHEJIANG ZHIYUAN ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this invention are that the ammonia nitrogen wastewater treatment effect is not ideal, the recycling performance is poor, the durability is not good, and the service life is short
[0007] In summary, when the electrodialysis method in the prior art is used to treat ammonia nitrogen wastewater, the cation exchange membrane has the defect that it is difficult to recycle. After recycling, the ammonia nitrogen removal ability and mechanical properties of the membrane material decrease significantly, resulting in a short service life. , poor durability, which restricts the development and application of electrodialysis in ammonia nitrogen wastewater treatment, so it is of great significance to develop a cation exchange membrane with good recycling performance

Method used

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  • A cation-exchange membrane for electrodialysis treatment of ammonia nitrogen wastewater and its preparation method

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Effect test

Embodiment 1

[0033] (1) Grind the biological vermiculite into nano-scale powder, then wash it with deionized water, and then dry it to obtain the biological vermiculite powder; the drying temperature is 118°C, and the drying time is 28 minutes; the average value of the biological vermiculite powder The particle size is 90nm;

[0034] (2) Add sodium alginate into deionized water, heat and mechanically stir until it is translucent without particles, then add the biological vermiculite powder prepared in step (1), continue stirring until uniformly dispersed, and then degas under reduced pressure, Sodium alginate colloid dispersed with biological vermiculite powder was obtained; the heating temperature was 66°C, the speed of mechanical stirring was 380r / min, and the time was 2.5h; the vacuum degree of vacuum defoaming was 12Pa, and the defoaming time was 7min; In the colloid, 4 parts by weight of sodium alginate, 1 part by weight of biological vermiculite powder, and 95 parts by weight of deio...

Embodiment 2

[0037] (1) Grind the biological vermiculite into nano-scale powder, then wash it with deionized water, and then dry it to obtain the biological vermiculite powder; the drying temperature is 110°C, and the drying time is 40 minutes; the average value of the biological vermiculite powder The particle size is 50nm;

[0038](2) Add sodium alginate into deionized water, heat and mechanically stir until it is translucent without particles, then add the biological vermiculite powder prepared in step (1), continue stirring until uniformly dispersed, and then degas under reduced pressure, Sodium alginate colloid dispersed with biological vermiculite powder was obtained; the heating temperature was 60°C, the speed of mechanical stirring was 300r / min, and the time was 3h; Among them, 3 parts by weight of sodium alginate, 1 part by weight of biological vermiculite powder, and 96 parts by weight of deionized water;

[0039] (3) Coat the sodium alginate colloid prepared in step (2) on a sm...

Embodiment 3

[0041] (1) Grind the biological vermiculite into nano-scale powder, then wash it with deionized water, and then dry it to obtain the biological vermiculite powder; the drying temperature is 130°C, and the drying time is 20 minutes; the average value of the biological vermiculite powder The particle size is 200nm;

[0042] (2) Add sodium alginate into deionized water, heat and mechanically stir until it is translucent without particles, then add the biological vermiculite powder prepared in step (1), continue stirring until uniformly dispersed, and then degas under reduced pressure, Sodium alginate colloid dispersed with biological vermiculite powder was prepared; the heating temperature was 70°C, the speed of mechanical stirring was 500r / min, and the time was 2h; the vacuum degree of vacuum defoaming was 20Pa, and the defoaming time was 5min; Among them, 5 parts by weight of sodium alginate, 2 parts by weight of biological vermiculite powder, and 93 parts by weight of deionize...

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Abstract

The invention belongs to the technical field of waste water treatment, and provides a cation exchange membrane for electrodialysis treatment of ammonia nitrogen waste water and a preparation method. In this method, biological vermiculite powder is added to sodium alginate colloid, coated and dried to form a film, ferric chloride solution is used as a cross-linking agent to make sodium alginate form a cross-linked film, and then washed with water to remove iron ions to obtain a Cation exchange membrane for electrodialysis treatment of ammonia nitrogen wastewater. Compared with the traditional method, the cation exchange membrane prepared by the present invention has high ammonia nitrogen removal efficiency and takes a long time to reach adsorption saturation. In the ammonia nitrogen wastewater containing microorganisms, it can cooperate with microorganisms to realize the regeneration cycle. , the desorption rate of ammonia nitrogen is high, and the cation exchange membrane can be recycled. And after long-term and cyclic use, the membrane material can still maintain high removal efficiency and mechanical properties, and has a long service life.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and provides a cation exchange membrane for electrodialysis treatment of ammonia nitrogen waste water and a preparation method. Background technique [0002] With the rapid development of social economy, the discharge of various pollutants has increased sharply, which has caused serious pollution to the environment, especially water bodies. Ammonia nitrogen and phosphorus are the main pollutants in my country's surface water. The excessive discharge of ammonia nitrogen wastewater is one of the main reasons for the eutrophication of water bodies. Excessive discharge of ammonia nitrogen into water bodies will lead to eutrophication of water bodies, reduce the ornamental value of water bodies, and the nitrate and nitrite produced by oxidation will also affect aquatic organisms. even human health. Therefore, wastewater denitrification treatment has received widespread attention. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469B01D67/00B01D61/48C02F101/16
CPCB01D61/485B01D69/125C02F1/4693C02F2101/16
Inventor 沈勘力李惠林蔡建华赵宏伟
Owner ZHEJIANG ZHIYUAN ENVIRONMENTAL TECH CO LTD
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