Visible light micro-nano reactor membrane for selective removal of ammonia nitrogen, preparation method and application thereof

A micro-nano reactor and selective technology, applied in chemical instruments and methods, light water/sewage treatment, special compound water treatment, etc. Real-time regeneration and other issues to achieve the effect of cheap and green online regeneration
CN110862176AActive Publication Date: 2020-03-06BEIJING ORIGIN WATER FILM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING ORIGIN WATER FILM TECH
Publication Date
2020-03-06

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Abstract

The invention provides a preparation method of a visible light micro-nano reactor membrane for selective removal of ammonia nitrogen. The method includes: taking calcium silicoaluminate hydrate, graphite-phase carbon nitride, an ammonium ion sieve material, polytetrafluoroethylene and dimethylacetamide as the main raw materials to obtain a mixed feed liquid, coating the obtained mixed feed liquidon a flat plate, and transferring dimethylacetamide into water, taking the flat plate out and performing drying to obtain the visible light micro-nano reactor membrane. By means of the ammonium ion sieve material, the visible light micro-nano reactor membrane provided by the invention can effectively realize selective exchange of ammonium ions from water, and through cooperation with a chloride ion adsorbent and a visible-light-induced photocatalyst, continuous regeneration of the ammonium ion sieve can be realized, continuous operation and stable water outflow of the membrane can be effectively realized, and the technical problems of low selectivity of conventional ion exchanger, difficult treatment of regenerated liquid, high regeneration cost, and difficult realization of in-situ real-time regeneration are solved.
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Description

【Technical field】

[0001] The invention relates to the field of membrane technology, in particular to a visible light micro-nano reactor membrane with the selective removal function of ammonia nitrogen, and relates to the method and application of the membrane. 【Background technique】

[0002] With the development of industry, the modernization of life and the non-point source pollution of agriculture, the pollution of ammonia nitrogen in surface water is increasing day by day. For the ammonia nitrogen treatment of the actual municipal water polluted by low concentration ammonia nitrogen, the treatment technologies currently used mainly include biochemical method and ion exchange method.

[0003] The biggest disadvantage of the biochemical method is that the operation is unstable, the ammonia nitrogen and total nitrogen in the produced water fluctuate too much, and it is difficult to achieve efficient and stable operation. This is because the main factors affecting biological...

Claims

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