Method and apparatus for enrichment of nitrate-nitrogen in water

A nitrate nitrogen enrichment technology, applied in the field of water treatment, to achieve the effect of easy operation and simple device structure

Active Publication Date: 2015-04-29
北京北控工业环境科技有限公司
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to address existing NO 3 - Insufficiency and defects of the separation and enrichment method, a method and device for enriching nitrate nitrogen in water are provided, the method and device can enrich nitrate nitrogen in water in a single treatment unit, and the system effluent contains NO 3 - The concentration is high, thereby realizing the enrichment of nitrate nitrogen, and the device structure is simple, which is convenient for actual operation

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  • Method and apparatus for enrichment of nitrate-nitrogen in water
  • Method and apparatus for enrichment of nitrate-nitrogen in water
  • Method and apparatus for enrichment of nitrate-nitrogen in water

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Embodiment Construction

[0024] Attached below figure 1 , 2 , 3, 4 and examples are described in detail to further understand the present invention.

[0025] A membrane module A8 of the present invention ( image 3 , Figure 4 ), is made up of anion exchange membrane 18, ultrafiltration membrane or microfiltration membrane 17 and support plate 16 with diversion groove 20 and hole 21; anion exchange membrane 18 and ultrafiltration membrane or microfiltration membrane 17 are respectively fixed on Both sides of the support plate 16.

[0026] In order to achieve better experimental results, the anion exchange membrane 18 used in the present invention is an anion exchange membrane of the type ACS provided by Astom, Japan, and the ultrafiltration membrane 17 is a 0.1 μm pore size, membrane pass membrane provided by Nanjing Ruijiete. The volume is 18.75-20.83L / m 2 .h ultrafiltration membrane.

[0027] A kind of nitrate nitrogen enrichment device in water provided by the present invention ( figure 1 ) ...

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Abstract

The invention relates to a method and an apparatus for enrichment of nitrate-nitrogen in water, and belongs to the technical field of water treatment. A method for enrichment of nitrate-nitrogen in water is characterized by comprising the following steps: raw water introduction; connection of a membrane module A, flow setting and micro aeration; power supply connection and current setting; setting of pumping stop time ratio and cleaning of the membrane module A; and re-operation. A special-purpose implementation apparatus is provided to complete the above steps. The method and apparatus can conduct enrichment of nitrate-nitrogen in water in a single treatment unit, and overcomes insufficiencies and defects of a NO3<-> separation and enrichment method in the prior art; in addition, the apparatus has a simple structure and is convenient for actual operations.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a method and device for enriching nitrate nitrogen in water. Background technique [0002] Currently, NO 3 - The main methods of separation and enrichment are adsorption and ion exchange, membrane absorption and electrodialysis. Adsorption and ion exchange methods (such as zeolite, ion exchange resin), can separate and concentrate NO 3 - , but there are problems such as limited adsorption capacity, high regeneration frequency, and secondary pollution caused by chemical regeneration. Therefore, most of the current applications of zeolite denitrification are for slightly polluted river water, landscape water, and effluent from secondary sedimentation tanks. body of water. Electrodialysis (ED) is often used to remove NO from wastewater 3 - Enrichment, this method has the advantages of low energy consumption and high efficiency, but electrodialysis has certain limitati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/469C02F1/42
Inventor 张岩刘焕光张中朱敏陈敬甘志明孙凤侠史扬谢杭冀
Owner 北京北控工业环境科技有限公司
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