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Method for killing chironomus larvas by ultraviolet light

A technology of chironomus larvae and ultraviolet light, which can be used in devices for capturing or killing insects, applications, animal husbandry, etc. It can solve problems such as difficulty in ensuring drinking water safety, carcinogenicity, and low killing rate, and achieve no toxic side effects The effects of products, ease of purchase, and safe operation

Inactive Publication Date: 2005-12-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of using chemical methods to remove chironomus larvae in raw water in the existing water treatment process, which has a low killing rate, and the by-products in the treated effluent contain carcinogenic and mutagenic substances, making it difficult to ensure drinking. Water Safety Concerns Offers a Way to Kill Chironomus Larvae with Ultraviolet Light

Method used

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  • Method for killing chironomus larvas by ultraviolet light
  • Method for killing chironomus larvas by ultraviolet light

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specific Embodiment approach 1

[0006] Specific embodiment 1: The method for killing chironomid larvae with ultraviolet light in this embodiment uses ultraviolet light with a wavelength of 254 nm to irradiate the water to be treated, and the ultraviolet light irradiation dose is 60 to 75 mJ / cm 2 , Will kill all the chironomid larvae in the treated water.

specific Embodiment approach 2

[0007] The second embodiment: The difference between this embodiment and the first embodiment is: this embodiment uses ultraviolet light with a wavelength of 254nm to irradiate the water to be treated, and the ultraviolet light irradiation dose is 61mJ / cm 2 , Will kill all the chironomid larvae in the treated water. A smaller radiation dose can kill all the chironomid larvae in the water being treated, which can save energy consumption to the greatest extent and reduce costs.

specific Embodiment approach 3

[0008] Specific embodiment three: The difference between this embodiment and specific embodiment one and specific embodiment two is: this embodiment uses ultraviolet light with a wavelength of 254nm to irradiate the water to be treated, and the ultraviolet light irradiation dose is 74mJ / cm 2 , Will kill all the chironomid larvae in the treated water. Under the premise of the same wavelength, the irradiation dose is 74mJ / cm 2 Ultraviolet light irradiates the treated water to kill all the chironomid larvae in the water. This technical scheme is the same as the use of 285nm wavelength ultraviolet light, using 80mJ / cm 2 Compared with the irradiation of the treated water with the irradiation dose, the chironomid larvae are all killed, which can save energy consumption and has a better killing effect.

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Abstract

The present invention relates to a method for killing midge larva by using UV light. Said invention uses UV light whose wave length is 254nm to irradiate the water to be treated, its irradiation dose is 60-75mJ / sq.cn, so that it can completely kill the midge larvae in the water.

Description

Technical field: [0001] The invention relates to a water treatment method, in particular to a method for killing chironomid larvae by ultraviolet light. Background technique: [0002] The excessive reproduction of chironomid larvae in the water body is another major problem that is accompanied by the proliferation of algae and phytoplankton in the water body and the eutrophication of the water body. The emergence of this problem has caused great difficulty in the water treatment process. , Especially for some water treatment processes that use reservoir water, lake water and other static water bodies as water sources, causing greater difficulty. At present, most water plants use chemical methods to remove chironomid larvae in raw water, that is, water treatment processes in which chlorine is pre-injected in raw water. Practice has proved that the chironomid larvae can only be killed by 28.9% when it is put into the raw water with a chlorine dosage of 10mg / L and contacted with the...

Claims

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Application Information

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IPC IPC(8): A01M1/22
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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