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Water treatment for killing living animals such as fleas by O3/H2O2

A zooplankton and water treatment technology, which is applied in the field of killing flea zooplankton in water so that they can be effectively removed, and can solve the problems of increasing disinfection by-products and failing to completely remove flea zooplankton and the like

Inactive Publication Date: 2005-02-23
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention solves the problems of increasing disinfection by-products and not being able to completely remove flea zooplankton existing in the removal of flea zooplankton in water by the prechlorination process of pre-dosing chlorine and ammonia in the past

Method used

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  • Water treatment for killing living animals such as fleas by O3/H2O2
  • Water treatment for killing living animals such as fleas by O3/H2O2
  • Water treatment for killing living animals such as fleas by O3/H2O2

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Experimental program
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Effect test

specific Embodiment approach 1

[0005] Specific embodiment one: This embodiment is pre-passing ozone and adding hydrogen peroxide to the raw water before conventional treatment, the amount of ozone per liter of raw water is 2.0-2.5mg, and the dosage of hydrogen peroxide is 4-2.5 mg. 10mg, the residence time of ozone and hydrogen peroxide in raw water is 20-30 minutes.

specific Embodiment approach 2

[0006] Embodiment 2: This embodiment is a test to verify the feasibility of the method of the present invention: continuously or intermittently pass ozone and hydrogen peroxide into the raw water before conventional treatment. Among them, raw water COD Mn 3.5-6.0mg / l, turbidity 15-25NTU. Ozone is produced by an ozone generator, transported to the bottom of the reactor through a closed pipeline, and is distributed by the microporous filter plate at the bottom to form tiny bubbles that fully contact the raw water. Hydrogen peroxide uses chemically pure reagents, diluted to 0.1% to 0.2%, and directly added through a peristaltic pump. The amount of ozone introduced per liter of raw water is 2.5 mg, the dosage of hydrogen peroxide is 10 mg, and the action time is 20 minutes. After 20 minutes, the test results show that all the zooplankton in the water have been killed. The killing rate is 100%.

specific Embodiment approach 3

[0007] Specific embodiment three: the present embodiment is a comparative experiment of adopting the method of the present invention and adopting chlorine gas killing method to do: the place of experiment is Bin County, Heilongjiang Province, and the raw water of Bin County Waterworks is carried out productive test, and the raw water quality condition is: water temperature 16°C; Turbidity 16.2NTU; COD Mn 3.64mg / L; pH value 7.15, Cyclops: 24 / L.

[0008] For the water fleas in the water, this test first uses the chlorine gas killing method to kill, and the killing effect refers to figure 1 ,Such as figure 1 As shown, in the safe concentration range of chlorine gas (≤3-4mg / L), the killing effect of chlorine gas killing method on Cyclops is not good. When 4mg of chlorine gas is added to one liter of water, the killing rate is only 65%; In addition, it is found that the killing rate will increase by 20% for every 1mg increase in the dosage of chlorine gas. If 100% killing rate i...

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Abstract

A water treating method for killing the flea kind of zooplanktons by use of O3 / H2O2 features that before the water is conventionally treated, the O3 and H2O2 are proportionally added to it and then stayed in water for 20-30 min.

Description

Technical field: [0001] The invention relates to a water treatment method, in particular to a method for killing zooplankton such as fleas in water so that they can be effectively removed. Background technique: [0002] The eutrophication of the water body provides a living space for the massive reproduction of Cyclops, and the overfishing of humans has become the driving force for the rapid growth of Cyclops. Cyclops have been found in the clear water ponds of water plants and even in the water of pipe networks in some large and medium-sized cities in my country, and there have even been many accidents in which water fleas have appeared in pipe network water. Practice has shown that Cyclops have tenacious vitality, mobility, and easy penetration of filters. The larger Cyclops can be seen with the naked eye, like white meat worms. Its appearance in the user's water not only violates the regulations on sensory traits in the sanitary standards for drinking water, but also bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50C02F1/72C02F1/78
Inventor 崔福义刘冬梅吴雅琴张敏
Owner HARBIN INST OF TECH
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