Water treatment method for killing living animals such as fleas by O3/H2O2
A technology for zooplankton and water treatment, which is applied in the field of killing flea zooplankton in water so that it can be effectively removed, and can solve problems such as the impact on drinking water safety, the threat of water safety problems, and the inability to remove daphnia zooplankton.
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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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