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Method for killing viruses in drinking water

A technology for drinking water and viruses, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of reducing the efficiency of killing viruses, increasing treatment costs, long treatment time, etc. problems, to achieve the effect of automatic management control, convenient management and operation, simple and convenient operation

Inactive Publication Date: 2014-07-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still two "levels" that need to be crossed before this kind of technology is practically applied: (1) Given that O 2 ·- The non-selectivity of and OH can only be applied to water bodies with a relatively clean background. When there are background substances (such as natural organic matter, carbonate, etc.) in the system, O 2 ·- and OH will react with background substances in large quantities, reducing the O 2 ·- The efficiency of killing viruses with OH requires more oxidants and longer treatment time, which significantly increases the treatment cost; (2) This technology needs to control the pH value of the water to be disinfected under acidic conditions, while the actual water body The pH value is often close to neutral. In the actual disinfection process, it is possible to adjust the pH value of large-scale water bodies to be disinfected to be acidic, but the project is huge, the cost is high, and it is not practical.
[0006] In summary, there is no realistic, efficient, economical and non-secondary pollution-free method for killing viruses in drinking water in the prior art

Method used

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  • Method for killing viruses in drinking water
  • Method for killing viruses in drinking water
  • Method for killing viruses in drinking water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Use an ion chromatograph and a total organic carbon detector to detect chlorine ions and dissolved organic carbon in the water to be disinfected. If the concentration of the two does not exceed 5mg / L, no treatment is required; if the concentration of the two exceeds 5mg / L, use MIEX magnetic ion The exchange resin (Beijing Ao Ruikai Company) pretreated the water to be disinfected. When the resin concentration was 200mL / L and the contact time was 5min, the raw water containing 10mg / L chloride ion and 8mg / L dissolved organic carbon was treated, and chlorine The ion concentration is 3.5mg / L, the dissolved organic carbon concentration is 4.5mg / L, and the pH value is 6.8. On the premise that the total concentration of chloride ions and dissolved organic carbon in the water does not exceed 5mg / L, to each liter of water to be disinfected: first add 10 10 PFU MS2 bacteria solution, then add 0.5 μmol food-grade citric acid and 0.5 μmol food-grade gallic acid, and then add 10 μmol...

Embodiment 2

[0040] Use an ion chromatograph and a total organic carbon detector to detect chlorine ions and dissolved organic carbon in the water to be disinfected. If the concentration of the two does not exceed 5mg / L, no treatment is required; if the concentration of the two exceeds 5mg / L, use MIEX magnetic ion The exchange resin (Beijing Ao Ruikai Company) pretreated the water to be disinfected. When the resin concentration was 200mL / L and the contact time was 5min, the raw water containing 10mg / L chloride ion and 8mg / L dissolved organic carbon was treated, and chlorine The ion concentration is 3.5mg / L, the dissolved organic carbon concentration is 4.5mg / L, and the pH value is 6.8. On the premise that the total concentration of chloride ions and dissolved organic carbon in the water does not exceed 5mg / L, add 10 10 PFU MS2 bacteria solution, then add 0.15 μmol food-grade citric acid and 0.05 μmol food-grade gallic acid, and then add 5 μmol copper sulfate. After these three agents are m...

Embodiment 3

[0042] Use an ion chromatograph and a total organic carbon detector to detect chlorine ions and dissolved organic carbon in the water to be disinfected. If the concentration of the two does not exceed 5mg / L, no treatment is required; if the concentration of the two exceeds 5mg / L, use MIEX magnetic ion The exchange resin (Beijing Ao Ruikai Company) pretreated the water to be disinfected. When the resin concentration was 200mL / L and the contact time was 5min, the raw water containing 10mg / L chloride ion and 8mg / L dissolved organic carbon was treated, and chlorine The ion concentration is 3.5mg / L, the dissolved organic carbon concentration is 4.5mg / L, and the pH value is 6.8. On the premise that the total concentration of chloride ions and dissolved organic carbon in the water does not exceed 5mg / L, add 10 10 PFU MS2 bacteria solution, then add 0.15 μmol food-grade citric acid and 0.05 μmol food-grade gallic acid, and then add 15 μmol copper sulfate. After these three agents are ...

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Abstract

A provided method for killing viruses in drinking water comprises the following steps: (1) detecting chloride ion concentration and dissolved organic carbon concentration in water by employing a detection instrument; (2) if the chloride ion concentration and the dissolved organic carbon concentration are both 5 mg / L or less, performing no treatment; and if at least one of the chloride ion concentration and the dissolved organic carbon concentration exceeds 5 mg / L, performing pretreatment on to-be disinfected water to enable the two concentration to be both reduced to 5 mg / L or less; and (3) successively adding a trivalent copper ion stabilizing agent, a divalent copper salt and a persulfate into the to-be disinfected water. The method is mile in treatment conditions and free of secondary pollution, and helps to improve the killing efficiency of drinking water on viruses.

Description

technical field [0001] The invention relates to a disinfection method for drinking water, in particular to a method for killing viruses in drinking water. Background technique [0002] The control of pathogenic microorganisms is an important aspect to ensure the sanitation and safety of drinking water. Among various pathogenic microorganisms, viruses are small and highly pathogenic. For a long time, health incidents caused by virus outbreaks in drinking water have been reported at home and abroad. Therefore, the sanitation and safety of drinking water should cause us to pay enough attention. However, at present, only a few developed countries have clear regulations on the degree of treatment of viruses in drinking water. The new version of "Drinking Water Hygienic Standards" (GB5749-2006) promulgated and implemented in my country in 2006 has not yet included treatment indicators for viruses. Only the treatment indicators for 4 microorganisms (Escherichia coli, thermotolerant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 刘小为张土乔方磊张仪萍
Owner ZHEJIANG UNIV
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