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Water treatment method capable of killing midge larva by ozone

A technology of chironomus larvae and water treatment, which is applied in the field of killing chironomus larvae in water so that they can be effectively removed, and can solve the problems of incomplete removal of chironomus larvae, increase of disinfection by-products, and impact on drinking water safety, etc.

Inactive Publication Date: 2007-05-30
HARBIN INST OF TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of low inactivation rate and impact on the safety of drinking water existing in the existing method for killing chironomus larvae, thereby providing a safe water treatment method that can completely remove chironomus larvae
The invention solves the problem of increasing disinfection by-products and inability to completely remove chironomus larvae existing in the removal of chironomus larvae in water by pre-chlorination process in the past. The invention adopts the water treatment technology of pre-passing ozone and utilizes strong oxidation of ozone It can effectively inactivate chironomus larvae so that they can be completely and effectively removed in the subsequent coagulation, sedimentation and filtration processes

Method used

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  • Water treatment method capable of killing midge larva by ozone

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specific Embodiment approach 1

[0005] Specific embodiment one: the water treatment method of using ozone to kill chironomus larvae in this embodiment is: pre-pass ozone to the raw water before the conventional treatment, the amount of ozone introduced per liter of raw water is 2.5 ~ 3.0mg, and the contact time is 20-30 minutes is enough.

specific Embodiment approach 2

[0006] Specific embodiment two: this embodiment is, before adding coagulant to raw water, dosing ozone, because ozone dissipates very quickly in water, its killing effect is mainly manifested within 20 minutes after passing through, and utilizes the experiment summary The law of ozone consumption in different actual water bodies is verified in production practice, and a feasible dosing plan for actual water bodies is obtained. When the ozone dosage is 2.5mg / L, the purpose of completely inactivating chironomus larvae can be achieved. When the ozone is introduced, the ozone recovery device is used for recovery.

specific Embodiment approach 3

[0007] Specific embodiment three: this embodiment is an actual test, and the amount of ozone introduced in every liter of raw water is 2.5mg, and the contact time is 30min. Chironomus larvae in water achieve 100% kill rate.

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Abstract

Disclosed is a water processing method for complete eradication of chironomus larvas through ozone, the method comprises pre-letting ozone into primary water before conventional processing, the ozone charge amount in each litter of water is 2.5-3.0mg, the time of contact is 20-30 mins.

Description

Technical field: [0001] The invention relates to a water treatment method, in particular to a method for killing chironomus larvae in water so that they can be effectively removed. Background technique: [0002] The eutrophication of the water body provides a living space for the mass reproduction of chironomus larvae, and overfishing by humans has become the driving force for the rapid growth of chironomus larvae. Chironomus larvae have been found in the clear water pools of water plants and even pipe network water in some large and medium-sized cities in my country, and there have even been many accidents in which chironomus larvae appeared in pipe network water. Practice has shown that the newly hatched chironomus larvae are tenacious in vitality, have swimming ability, and can easily penetrate the filter tank. Its appearance in the user's water not only violates the regulations on sensory traits in the sanitary standards for drinking water, but also brings adverse senso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78A01N59/00
Inventor 崔福义孙兴滨张金松徐峰赵凯刘丽君
Owner HARBIN INST OF TECH
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