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Water treatment method for cooperative disinfection via ozone/ultraviolet/chlorine

A water treatment and chlorine disinfection technology, applied in the field of water treatment, can solve problems such as increased operating costs, excessive water discharge indicators, and unclear load distribution

Active Publication Date: 2021-11-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the disinfection unit of the current reclaimed water plant often has the problem of unclear load distribution, which not only increases the operating cost, but also has the risk of some effluent discharge indicators exceeding the standard

Method used

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  • Water treatment method for cooperative disinfection via ozone/ultraviolet/chlorine
  • Water treatment method for cooperative disinfection via ozone/ultraviolet/chlorine
  • Water treatment method for cooperative disinfection via ozone/ultraviolet/chlorine

Examples

Experimental program
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Effect test

Embodiment 1

[0072] see figure 2 , according to the following method to implement the water treatment method using ozone / ultraviolet / chlorine for synergistic disinfection.

[0073] 1. Determine the effluent discharge standards for chromaticity, residual chlorine and microbial indicators:

[0074] The implementation site is a reclaimed water plant in Beijing. According to the national standard "Water Quality of Urban Sewage Recycling and Utilization Landscape Environment Water Quality", the national standard "Urban Sewage Recycling and Utilizing Urban Miscellaneous Water Quality" and the Beijing local standard "Water Pollutant Discharge Standard for Urban Sewage Treatment Plants" , the lowest chromaticity effluent discharge standard is no more than 10 degrees, the most stringent effluent discharge standard for residual chlorine is 0.05-0.1mg / L, and the most stringent effluent discharge standard for microbial indicators is that the fecal Escherichia coli does not exceed 3CFU / L.

[0075] Th...

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Abstract

The invention discloses a water treatment method for cooperative disinfection via ozone / ultraviolet light / chlorine. The method is mainly used for treating effluent of a secondary sedimentation tank having been subjected to biochemical treatment or regenerated water having been subjected to a membrane process. According to the method, a water body is subjected to ozone disinfection, ultraviolet disinfection and chlorine disinfection in sequence, wherein ozone dosage is the minimum ozone dosage meeting a chroma removal requirement, a chlorine dosage needs to meet a residual chlorine effluent standard, and an ultraviolet dosage needs to meet a microbiological indicator effluent standard. The method solves the problem that the load distribution of a disinfection unit of a current regeneration water plant is indefinite, and overcomes the limitations that the variety of pathogenic microorganisms removed by a single disinfection process is limited and more harmful disinfection byproducts are generated by single chlorine disinfection. The method can meet the standards of effluent chromaticity, residual chlorine and microbiological indexes, realizes synergistic and efficient removal of pathogenic microorganisms and sensory indexes, can effectively reduce the operation cost for disinfection, and ensures the safety of reuse of reclaimed water.

Description

technical field [0001] The present invention relates to the technical field of water treatment, in particular, the present invention relates to a water treatment method for disinfection through ozone / ultraviolet light / chlorine in sequence. Background technique [0002] Water shortage has always been one of the problems faced by the world, and water reuse is an effective means to alleviate water shortage. In recent years, the scale of reclaimed water reuse has increased year by year, and many sewage treatment plants are developing into reclaimed water plants. With the further upgrading and transformation of many reclaimed water plants, in a series of indicators such as chromaticity, residual chlorine, and microorganisms, the effluent of water plants needs to meet stricter discharge standards. [0003] In view of the above situation, the disinfection process has become a necessary part of the reclaimed water treatment. There are many types of disinfection technologies, such ...

Claims

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Application Information

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IPC IPC(8): C02F9/08
CPCC02F9/00C02F1/78C02F1/32C02F1/76C02F2303/04Y02W10/37
Inventor 陆韻魏凡钦施琦陈卓
Owner TSINGHUA UNIV
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