Application of magnetic separation filter in killing chironomus larvas in water

A technology for separating and filtering chironomus larvae, which is applied in the field of killing insects, can solve the problems of killing chironomus larvae in water without magnetic separation filters, and achieve the effects of inhibiting growth and reproduction, avoiding secondary pollution, and preventing diseases

Inactive Publication Date: 2009-03-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no record in the prior art that the magnetic separation filter has the property of killing insects in water, and there is no report that the magnetic separation filter is used to kill chironomus larvae in water

Method used

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  • Application of magnetic separation filter in killing chironomus larvas in water
  • Application of magnetic separation filter in killing chironomus larvas in water
  • Application of magnetic separation filter in killing chironomus larvas in water

Examples

Experimental program
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Effect test

example 1

[0027] Experiment on the Influence of Magnetic Induction (also known as Magnetic Flux Density) and Flow Velocity on Inactivation Effect

[0028] Because the magnetic flux density of the existing magnetic separation filter is usually 1000-6000 Gauss, and killing chironomus larvae in water is directly related to the magnetic flux density of the magnetic separation filter, so the inventors adopt a magnetic flux density of 1000 Gauss respectively. , 2000 gauss, 3000 gauss, 4000 gauss, 5000 gauss and 6000 gauss magnetic separation filters were tested for inactivation effect under the condition of water flow velocity of 10-80m / h. The specific experimental conditions and results are shown in Table 1. For the convenience of analysis, set the abscissa as the flow rate of water (in Table 1

[0029] Table 1

[0030]

[0031] Note: In Table 1, the raw water is the treated water, and the effluent is the treated water.

[0032] Filtration rate), the ordinate is the inactivation rate, d...

example 2

[0034] Experiment on the effect of adding magnet powder on the inactivation effect

[0035] Adding magnetic powder to the treated water for pre-magnetic flocculation is a common method of purification using magnetic separation filters. Therefore, in order to make the magnetic separation filter kill chironomus larvae in the process of water purification, research must be carried out The effect of magnetic flocculation on the inactivation effect. In this example, magnetic separation filters with magnetic flux densities of 4000 Gauss, 5000 Gauss and 6000 Gauss are used, and magnets with a concentration of 1mg / L, 3mg / L and 5mg / L are put into them respectively under the condition of water flow velocity of 10-80m / h. The powder was tested for its inactivation effect. In order to facilitate the analysis, the abscissa is the flow rate of water, and the ordinate is the inactivation rate, respectively plotted as figure 2 , image 3 with Figure 4 The graph shown. Depend on figure...

example 3

[0037] Example of a method of using a magnetic separation filter for water purification

[0038] see Figure 5, this example is the purification step in the conventional water treatment process, the inlet and the outlet of the magnetic separation filter 4 are respectively connected with the water supply equipment (such as water pump) and the conventional water supply process through pipelines, and the connecting pipelines of the magnetic separation filter 4 input ends are connected in series A flow meter 2 and a pre-magnet 3 are connected, wherein the front end of the pre-magnet 3 is connected to another flow meter 2 and communicated with the magnetic powder storage tank; the output end of the magnetic separation filter 4 is also connected to the high-pressure backwash through a valve. The water source is connected to the backwash air pump 5; the outlet of the magnetic separation filter 4 is also connected to the backwash drain through a stop valve.

[0039] see Figure 5 , ...

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Abstract

The invention relates to the technical field of insect killing, in particular to application of a magnetic separation filter to the killing of Chironomus larvas in water. The method for killing the Chironomus larvas in the water by the magnetic separation filter mainly comprises the following processing step of making the water to be treated flow over the magnetic separation filter with the flux density between 4,000 and 6,000 at the speed of between 10 and 60 meters per hour. The method utilizes the characteristic of capability of killing the Chironomus larvas in the water of the magnetic separation filter, skillfully applies the characteristic to the water treatment technique, kills the Chironomus larvas while separating and filtering impurities, and has the advantages of simple equipment, compact structure, small occupied space, high filtering velocity, low energy consumption, easiness in realizing automation and so on.

Description

technical field [0001] The invention relates to the technical field of killing insects, in particular to a physical method for killing chironomus larvae in water. Background technique [0002] The aggravation of natural water pollution has directly led to a significant decrease in the diversity of benthic animals, causing chironomus larvae adapted to eutrophic water to breed in large numbers in reservoirs and lakes. Due to poor workmanship and poor management in the existing urban water purification system, aquatic animals such as chironomus larvae enter the clean water pool and water supply pipe network, and even appear in the drinking water of residents, seriously threatening the safety of drinking water. Existing water treatment processes often use chemical oxidation pretreatment technologies such as pre-chlorination or pre-ozone, which use chemical agents to react with organisms to kill chironomus larvae and solve the problem of chironomus larvae pollution. Although the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/48
Inventor 荣宏伟张朝升张可方
Owner GUANGZHOU UNIVERSITY
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