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Membrane distillation and bipolar membrane electrodialysis combined wastewater treatment system

A bipolar membrane electrodialysis and wastewater treatment system technology, applied in water/sewage treatment, heating water/sewage treatment, oxidized water/sewage treatment, etc. Problems such as material aging, to achieve the effect of improving operation stability and water quality, restoring membrane distillation performance, and prolonging service life

Active Publication Date: 2021-08-24
FUZHOU UNIVERSITY
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Problems solved by technology

[0004] However, in the treatment of high-concentration wastewater, the pollution of organic and inorganic substances in wastewater occurs at the same time, which is likely to cause serious composite pollution by membrane distillation, resulting in a significant decline in membrane performance, and even worsening retention efficiency due to wetting; and the reversibility of pollution is low, Frequent chemical cleaning increases operating costs on the one hand, and accelerates the aging of membrane materials on the other hand, affecting the stability of the distillation process

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  • Membrane distillation and bipolar membrane electrodialysis combined wastewater treatment system

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0024] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention relates to a membrane distillation and bipolar membrane electrodialysis combined wastewater treatment system. The wastewater treatment system mainly comprises a precise filtration system, an advanced oxidation system, a bipolar membrane electrodialysis system, a membrane distillation system, a crystallization system, a water storage tank, an acid adjusting tank and an alkali storage tank; and after granular substances in wastewater are removed through precision filtration pretreatment, a small amount of wastewater enters the advanced oxidation system to remove organic matters, and the wastewater continues to be treated through the bipolar membrane electrodialysis system to form acid liquor and alkali liquor. Most raw water is acidified by acid liquor of the electrodialysis system and then enters the membrane distillation system to be purified, and formed concentrated liquor enters the crystallization system to be treated. After stage operation, alkali liquor generated by the bipolar membrane electrodialysis system is used for regularly cleaning the membrane distillation assembly. The system organically combines membrane distillation and bipolar membrane electrodialysis, and has the advantages of simple equipment, good treatment effect and the like.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a wastewater treatment system combining membrane distillation and bipolar membrane electrodialysis. Background technique [0002] At present, membrane separation technology has received more and more attention in the field of wastewater treatment due to its advantages of low energy consumption, low maintenance, energy saving, environmental protection, high efficiency, and simple operation and control. However, the traditional pressure-driven membrane separation technology often has problems such as complex and cumbersome pretreatment process and serious membrane fouling during operation, resulting in serious membrane flux attenuation. During long-term operation, the performance of the membrane system is greatly reduced and the service life is relatively long In short, these defects limit the application and development of membrane separation technology in actual wastewater tre...

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Application Information

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IPC IPC(8): C02F9/10C02F101/30
CPCC02F9/00C02F1/08C02F1/4693C02F1/001C02F1/72C02F2101/30C02F2303/14C02F2303/16
Inventor 鄢忠森刘灵珊范功端卢振宇蒋宇铃鲍舒蕾
Owner FUZHOU UNIVERSITY
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