CN101381132B - Application of magnetic separation filter in killing chironomus larvas in water - Google Patents
Application of magnetic separation filter in killing chironomus larvas in water Download PDFInfo
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- CN101381132B CN101381132B CN2008102185384A CN200810218538A CN101381132B CN 101381132 B CN101381132 B CN 101381132B CN 2008102185384 A CN2008102185384 A CN 2008102185384A CN 200810218538 A CN200810218538 A CN 200810218538A CN 101381132 B CN101381132 B CN 101381132B
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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
The present invention relates to a kind of technical field of catching and killing insect, be specifically related to kill the physical method of chironomus larvas in the water.
Background technology
Increasing the weight of of natural water body pollution level directly causes the zoobenthos diversity obviously to reduce, and makes the chironomus larvas that adapts to eutrophic water body multiply in a large number in reservoir, lake class source water.Existing city water cleaning systems owing to reasons such as technology is not proper, mismanagements, makes these hydrocoles of chironomus larvas enter clean water basin and water supply network, even appears in resident's tap water, and serious threat is to drinking water safety.Existing water technology often adopts chemical oxidization method preconditioning techniques such as prechlorination or pre-ozone, utilizes chemical agent and organism to react, and kills chironomus larvas, solves the chironomus larvas pollution problem.Though chemical oxidization method is easy to combine with conventional water treatment process, simple and flexible, easy to use, chironomus larvas is shown inactivating efficacy preferably, but these oxygenants to the chironomus larvas inactivation process in again with water body in some organism and inorganics react, generated some to poisonous, the deleterious carcinogenic and mutagenesis by product of human body and animal body, water body has in a disguised form been produced secondary pollution, therefore adopted physical method to kill chironomus larvas and be subjected to studying in the industry focus.
Publication number is CN 1709052A, CN 1730408A and CN 1748497A have disclosed a kind of UV-light of utilizing respectively, the method of ozone and supersonic killing chironomus larvas, though having overcome the employing chemical agent, these physical killing methods kill the existing above-mentioned many deficiencies of chironomus larvas, and has an inactivating efficacy preferably, but the corpse of the chironomus larvas after killing also must be through precipitation, water technologies such as filtration could be removed, this obviously makes the process of killing chironomus larvas become an additional technological process of water technology, will increase the complexity and the construction investment of water treatment system undoubtedly.
The magnetic separation filtration device be used in the water treatment separating, the common equipment of filtered water impurity, it utilize high-intensity magnetic field and filtering bodies with the impurity absorption in the water, interception again by wash water valve or adopt the method for recoil to get rid of.But not seeing relevant magnetic separation filtration utensil in prior art has the record of killing the characteristic of insect in the water, does not more see the report that the magnetic separation filtration device is used for killing the water chironomus larvas.
Summary of the invention
The new purposes that the purpose of this invention is to provide the magnetic separation filtration device, i.e. the application in the chironomus larvas in killing water.
In fact, such use of the present invention relates to the application in the chironomus larvas in killing water of magnetic separation filtration device.
Simultaneously, the invention still further relates to and use the magnetic separation filtration device to kill the method for chironomus larvas in the water, this method may further comprise the steps: making processed water cross magneticflux-density (also claiming magnetic induction density) with the velocity flow of 10～60m/h is 4000～6000 Gausses' magnetic separation filtration device.
In order further to improve killing effect, make the corpse of chironomus larvas be more convenient for separating, filtering simultaneously with other impurity, method of the present invention is before processed water passes through described magnetic separation filtration device, drop into magnetic iron powder in 3～5mg/L ratio in processed water, the magneticflux-density of flowing through again after fully being mixed is 2700～3200 Gausses' a pre-magnetization device premagnetization.
Described magnetic separation filtration device is stopped up and reduce that it separates, filtering efficient for fear of chironomus larvas corpse and other impurity, method of the present invention is after separating and filtering finishes, filtration is trapped in chironomus larvas corpse in the magnetic separation filtration device and other impurity, with the pressurized air recoil, remove with water backwashing more earlier.
Being easy to of the method for killing chironomus larvas in the water of the present invention is achieved in the water purifying treatment of the magnetic separation filtration of routine, and the step of specific implementation is:
(1) magnetic flocculation: add the magnetic iron powder of 3～5mg/L in the penstock of carrying former water, utilize flow action to make former water and magnetic iron powder carry out thorough mixing, the magneticflux-density of flowing through then is the pre-magnetic flocculation of 2700～3200 Gausses' pre-magnetization device;
(2) magnetic separation filtration: it is that 4000～6000 Gausses' magnetic separation filtration device carries out separating and filtering that the former water after the pre-magnetization device premagnetization is crossed magneticflux-density with the velocity flow of 10～60m/h;
(3) filter back flushing: after separating and filtering finished, described magnetic separation filtration device with the pressurized air recoil, was used water backwashing earlier again, removed and filtered chironomus larvas corpse and other impurity of holding back.
Magnetic separation filtration device of the present invention is a magnetic separation filtration device commonly used in the water treatment, can be permanent magnetism magnetic source strainer, also can be electromagnetism magnetic source strainer, and wherein said magnetic source can be positioned at pipe, also can be positioned at outside the pipe.
The present invention utilizes the magnetic line of force of the high magnetic flux density of magnetic separation filtration device generation to directly act on chironomus larvas, makes chironomus larvas cells in vivo weave construction be damaged and death, need not to add chemical reagent and can reach the purpose of killing chironomus larvas in the water.
The present invention compared with prior art has following advantage:
(1) this method easily combines with conventional handling technology of water supply, and equipment volume is little, has reduced floor space, can save the part initial cost, and is easy to realize integrated, the automatization that purify;
(2) induced current and the magnetic line of force that utilizes magnetic field to produce directly acts on chironomus larvas, destroyed its cell tissue, makes its death, need not to add chemical reagent, thereby avoided the secondary pollution problem;
(3) water purification treatment process of the present invention is remarkable to the removal effect of organism, suspended substance, dissolved phosphorus etc. in the water, the throwing measurer that helps to reduce flocculation agent has certain effect of coagulating that helps, and help reducing generation carcinogenic in the follow-up sterilizing process, mutagenic matter, also can suppress growth and the breeding of chironomus larvas effectively.
(4) in water purification treatment process of the present invention, water by magnetic field after relevant physicochemical property for example qualitative change can take place in specific conductivity, surface tension, susceptibility, pH, chemical potential, can prevent pipeline scale, and can bring certain benefit, and help preventing disease to people, animal and plant etc.
Description of drawings
Fig. 1 be under the condition of the different filtering velocitys flow velocity for the treatment of water (must), different magnetic induction density to the effect curve figure of chironomus larvas deactivation, among the figure,
For magneticflux-density is 1000 Gausses' a curve,
For magneticflux-density is 2000 Gausses' a curve,
For magneticflux-density is 3000 Gausses' a curve,
For magneticflux-density is 4000 Gausses' a curve,
For magneticflux-density is 5000 Gausses' a curve,
For magneticflux-density is 6000 Gausses' curve.
Fig. 2 is under the condition of different magneticflux-densities and filtering velocity, adds the effect curve figure that kills chironomus larvas of 1mg/L magnetic iron powder, among the figure,
For magneticflux-density is 4000 Gausses' a curve,
For magneticflux-density is 5000 Gausses' a curve,
For magneticflux-density is 6000 Gausses' curve.
Fig. 3 is under the condition of different magneticflux-densities and filtering velocity, adds the effect curve figure that kills chironomus larvas of 3mg/L magnetic iron powder, among the figure,
For magneticflux-density is 4000 Gausses' a curve,
For magneticflux-density is 5000 Gausses' a curve,
For magneticflux-density is 6000 Gausses' curve.
Fig. 4 is under the condition of different magneticflux-densities and filtering velocity, adds the effect curve figure that kills chironomus larvas of 5mg/L magnetic iron powder, among the figure,
For magneticflux-density is 4000 Gausses' a curve,
For magneticflux-density is 5000 Gausses' a curve,
For magneticflux-density is 6000 Gausses' curve.
Fig. 5 utilizes the magnetic separation filtration device to kill the water purification processing method process flow sheet of chironomus larvas in the water.
Embodiment
Example 1
Magnetic induction density (also claiming magneticflux-density) and flow velocity are to the experiment of inactivating efficacy influence
Because the magneticflux-density of existing magnetic separation filtration device is generally 1000～6000 Gausses, and it is directly related with the magneticflux-density of magnetic separation filtration device to kill in the water chironomus larvas, therefore the inventor to adopt magneticflux-density respectively be that 1000 Gausses, 2000 Gausses, 3000 Gausses, 4000 Gausses, 5000 gaussian sums, 6000 Gausses' magnetic separation filtration device is to carry out the inactivating efficacy experiment under the condition of 10～80m/h in flow velocity, concrete experiment condition and result are as shown in table 1.For the ease of analyzing, the flow velocity of establishing X-coordinate and be water is (in the table 1
Table 1
Annotate: in the table 1, former water is processed water, and water outlet is the water after handling.
Filtering velocity), ordinate zou is an inactivation ratio, draws out graphic representation as shown in Figure 1.As seen from Figure 1: 1, when processed flow velocity during smaller or equal to 30m/h, adopting magneticflux-density is 4000 Gausses, 5000 gaussian sums, 6000 Gausses' magnetic separation filtration device, all can reach or near 100% inactivating efficacy; 2, under identical flow velocity, the magnetic induction density of magnetic separation filtration device is high more, and inactivating efficacy is good more; 3, select the velocity of flow that can suitably improve processed water of the big magnetic separation filtration device of magnetic induction density for use.
Example 2
Add the experiment of magnetic iron powder to the inactivating efficacy influence
Adding magnetic iron powder in processed water, to carry out pre-magnetic flocculation be to adopt the magnetic separation filtration device to carry out the common methods of purifying treatment, therefore to make the magnetic separation filtration device in the process that water purification is handled, can kill chironomus larvas, must study of the influence of pre-magnetic flocculation inactivating efficacy.It is that 4000 Gausses, 5000 gaussian sums, 6000 Gausses' magnetic separation filtration device is under the condition of 10～80m/h in flow velocity that this example adopts magneticflux-density, and the magnetic iron powder that drops into concentration respectively and be 1mg/L, 3mg/L and 5mg/L carries out the inactivating efficacy experiment.For the ease of analyzing, be the flow velocity of water with the X-coordinate, ordinate zou is an inactivation ratio, draws out respectively as Fig. 2, Fig. 3 and graphic representation shown in Figure 4.By Fig. 2, Fig. 3 and Fig. 4 as seen: 1, drop into magnetic iron powder and carry out pre-magnetic flocculation inactivation ratio and slightly improve, when the concentration of magnetic iron powder when being 3mg/L～5mg/L effect fairly obvious; 2, dropping into the flow velocity that magnetic iron powder carries out pre-magnetic flocculation processed water can suitably improve, and the amplitude that improves increases with the increase of the magnetic induction density of magnetic separation filtration device.
Example 3
The magnetic separation filtration device is used for the method example of water purifying treatment
Referring to Fig. 5, this example is the purifying step in the conventional water treatment process, the import of magnetic separation filtration device 4 is connected with the water supply process of water equipment (as water pump) with routine by pipeline respectively with outlet, be serially connected with under meter 2 and pre-magnetization device 3 on the connecting tube of magnetic separation filtration device 4 input terminuss, wherein the front end of pre-magnetization device 3 side connects another under meter 2 and is communicated with the magnetic iron powder bin; The output terminal of described magnetic separation filtration device 4 also is connected with back flushing air pump 5 with high pressure back flushing water source by valve respectively; The outlet of described magnetic separation filtration device 4 also is connected with the back flushing water port by a stopping valve.
Referring to Fig. 5, the water purification treatment process is made up of following steps in the present embodiment:
(1) concentration of pressing 4mg/L adds magnetic iron powder in former water (processed water), utilize flow action that former water and magnetic iron powder are carried out thorough mixing, the magneticflux-density of flowing through then is that 2700～3200 Gausses' pre-magnetization device carries out pre-magnetic treatment, makes magnetic iron powder have certain magnetic.In this process, the magnetic iron powder after the pre-magnetic treatment just is attached to the surface of chironomus larvas, bacterium, virus, algae and organic and inorganic impurity and flocculates.
(2) the former water after the pre-magnetization device premagnetization flows through the magnetic separation filtration device 4 that magneticflux-density is 5000 Gausses with the flow velocity of 60m/h, adheres to No. 1 steel wool filtering layers absorption that the chironomus larvas of magnetic magnetic iron powder and other impurity promptly filled in the magnetic separation filtration device 4 in the water or holds back.In magnetic separation filtration device 4, chironomus larvas is directly acted on by the magnetic line of force of high magnetic flux density, and the cells in vivo weave construction is damaged and death.
(3) after finishing the filtration cycle of magnetic separation filtration device 4, need carry out back flushing, its process is as follows:
A. close 4 imports of magnetic separation filtration device earlier and export the valve that is positioned on the water passage, open the valve that is connected with the back flushing water port again;
B. open the valve that is connected with air pump 5, gas dashes 2 minutes (backwash rate 200L/ (sm
2), 0.7MPa), and then open the valve that is connected with high pressure back flushing water source, carry out gas, water simultaneously towards 5 minutes (water backwash rate 100L/ (sm
2), 0.5MPa), close the valve that is connected with air pump 5 at last, water dashes 3 minutes (water backwash rate 50L/ (sm
2), 0.5MPa), the chironomus larvas corpse that filtration is held back is discharged with the water of other impurity and recoil;
C. after back flushing finishes, close all valves of opening among the step b earlier, all valves of closing among the opening steps a continue to carry out successively above-mentioned steps (2) and (3) again, and so constantly circulation can be carried out the water purification processing.
The detected result of former water is before the above-mentioned purifying treatment: water-quality COD
Mn1.6～3.4mg/L, turbidity 10～16NTU, 800～6000/mL of total plate count, total coli group 1.6～9.2 * 10
4Individual/L, 10～15/L of chironomus larvas density; Detected result after above-mentioned purifying treatment is as follows:
(1) to the life of swimming 1 age chironomus larvas and the end dwell 2～4 age chironomus larvas all can all kill, inactivation ratio reaches 100%, and all is trapped on the bristle filtrate by the magnetic filteration, no longer contains chironomus larvas in the water of filter back.
(2) COD
MnTreat effluent concentration is less than 1mg/L, and clearance reaches more than 50%; Turbidity is lower than 5NTU, and average removal rate reaches 65%.
(3) the total plate count clearance is reached more than 85%, the total coli group clearance reaches more than 90%.
Claims (3)
1. method of using the magnetic separation filtration device to kill chironomus larvas in the water, this method may further comprise the steps:
A, drop into magnetic iron powder in 3～5mg/L ratio in processed water, the magneticflux-density of flowing through again after fully being mixed is 2700～3200 Gausses' a pre-magnetization device premagnetization;
B, the water after step a premagnetization are crossed the magnetic separation filtration device that magneticflux-density is 4000～6000 Gausses with the velocity flow of 10～60m/h.
2. method according to claim 1 is characterized in that this method is further comprising the steps of: after separating and filtering finishes, filtration is trapped in chironomus larvas corpse and other impurity in the magnetic separation filtration device, with the pressurized air recoil, removes with water backwashing more earlier.
3. water purification treatment process, this method is made up of the following step:
(1) magnetic flocculation: add the magnetic iron powder of 3～5mg/L in the penstock of carrying former water, utilize flow action to make former water and magnetic iron powder carry out thorough mixing, the magneticflux-density of flowing through then is the pre-magnetic flocculation of 2700～3200 Gausses' pre-magnetization device;
(2) magnetic separation filtration: it is that 4000～6000 Gausses' magnetic separation filtration device carries out separating and filtering that the former water after the pre-magnetization device premagnetization is crossed magneticflux-density with the velocity flow of 10～60m/h;
(3) filter back flushing: after separating and filtering finished, described magnetic separation filtration device with the pressurized air recoil, was used water backwashing earlier again, removed and filtered chironomus larvas corpse and other impurity of holding back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102185384A CN101381132B (en) | 2008-10-22 | 2008-10-22 | Application of magnetic separation filter in killing chironomus larvas in water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102185384A CN101381132B (en) | 2008-10-22 | 2008-10-22 | Application of magnetic separation filter in killing chironomus larvas in water |
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| Publication Number | Publication Date |
|---|---|
| CN101381132A CN101381132A (en) | 2009-03-11 |
| CN101381132B true CN101381132B (en) | 2010-06-02 |
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| CN2008102185384A Expired - Fee Related CN101381132B (en) | 2008-10-22 | 2008-10-22 | Application of magnetic separation filter in killing chironomus larvas in water |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260765A (en) * | 1997-05-19 | 2000-07-19 | 戴维·布赖恩·特尔弗 | Removal of cell growth from body of water |
| CN2659876Y (en) * | 2003-07-08 | 2004-12-01 | 黄日光 | Long range magnetic processor |
| CN1709052A (en) * | 2005-07-01 | 2005-12-21 | 哈尔滨工业大学 | Method for killing chironomus larvas by ultraviolet light |
| CN1730408A (en) * | 2005-07-01 | 2006-02-08 | 哈尔滨工业大学 | Water treatment method capable of killing midge larva by ozone |
-
2008
- 2008-10-22 CN CN2008102185384A patent/CN101381132B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1260765A (en) * | 1997-05-19 | 2000-07-19 | 戴维·布赖恩·特尔弗 | Removal of cell growth from body of water |
| CN2659876Y (en) * | 2003-07-08 | 2004-12-01 | 黄日光 | Long range magnetic processor |
| CN1709052A (en) * | 2005-07-01 | 2005-12-21 | 哈尔滨工业大学 | Method for killing chironomus larvas by ultraviolet light |
| CN1730408A (en) * | 2005-07-01 | 2006-02-08 | 哈尔滨工业大学 | Water treatment method capable of killing midge larva by ozone |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-321610A 2001.11.20 |
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Granted publication date: 20100602 Termination date: 20121022 |