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Water treatment method and water treatment device

A water treatment and pretreatment technology, applied in the field of water treatment, can solve the problems of reducing the economic effectiveness of the process, high oxidant dosage and energy consumption, and achieve the goals of improving safety, high water yield and low energy consumption Effect

Pending Publication Date: 2018-06-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the advanced oxidation process is not selective, because the concentration of NOM in water (in the order of mg / L) is at least 3 orders of magnitude higher than the concentration of TrOCs and odor / taste substances (in the order of μg / L or lower), so for Effective removal of TrOCs and odor / taste substances requires high oxidant dosage and energy consumption, thus reducing the economic effectiveness of the process

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Embodiment Construction

[0025] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. It should be understood, however, that these descriptions are exemplary only, and are not intended to limit the scope of the present disclosure. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present disclosure.

[0026] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising", etc. used herein indicate the presence of stated features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0027] All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art, unless otherw...

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Abstract

The disclosure provides a water treatment method. The method comprises the steps of enabling water to be treated to pass through a nanofiltration membrane with large interception molecular weight, wherein the nanofiltration membrane with the large interception molecular weight comprises a nanofiltration membrane body with the large interception molecular weight of not less than 800 Daltons, and liquid which is treated by a chemical oxidation process and passes through the nanofiltration membrane body with the large interception molecular weight. The invention also provides a water treatment device.

Description

technical field [0001] The present disclosure relates to the technical field of water treatment, and more particularly, to a water treatment method and device. Background technique [0002] The conventional process of drinking water treatment with "coagulation→sedimentation→filtration→disinfection" as the main process unit can remove most of the particles, turbidity, microorganisms and some natural organic matter (NOM) and other impurities in raw water. When the raw water contains high concentrations of NOM, trace organic compounds (TrOCs) or odor / taste substances, the conventional treatment process cannot meet the treatment requirements, and an advanced treatment process needs to be added after the conventional treatment process. [0003] The most commonly used advanced treatment process is "ozone-biological activated carbon (O 3 -BAC)” process. When running well, O 3 - The BAC process can remove about 50% of NOM, most of TrOCs and most of the odor / taste substances. But ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/14
CPCC02F1/30C02F1/32C02F1/442C02F1/722C02F1/725C02F1/78C02F9/00C02F1/001C02F3/00C02F1/52C02F1/70C02F1/444C02F2001/007C02F2301/08C02F2303/04C02F2305/023
Inventor 王小
Owner TSINGHUA UNIV