KR20130022002A - Sedimentation tank for multi-filtering - Google Patents

Abstract

PURPOSE: A settling tub for multiple filtering is provided to considerably delay a blockade by selectively filtering adulterations corresponding to a pore size of a filtering net, to effectively remove the adulterations in flowing water by settling sand, etc. which are heavier than water on a screen supporter by a reverse-siphonage type waterway. CONSTITUTION: A settling tub for multiple filtering comprises a bottom part(200), an exterior wall(300), multiple partition walls(400), a filtering part, and a cover part. The exterior wall is installed in the left and right sides of the bottom part. The multiple partition walls are installed in between the exterior walls installed in the left and right sides. The filtering part comprises multiple filtering tubs installed in between the partition walls, and multiple filtering nets(520) installed in the multiple filtering tubs. The cover part covers the upper part of the space between the exterior walls. The size of a sieve of the screen installed in the filtering net becomes smaller to the downstream.

Description

Sedimentation tank for multiple filtration {SEDIMENTATION TANK FOR MULTI-FILTERING}

The present invention relates to a multiple filtration sedimentation tank, and more particularly, to sequentially filter the contaminants contained in the flowing water (flow water), and to easily discharge the filtered contaminants, multiple filtration that can be easily assembled and constructed It relates to a sedimentation tank.

Rainfall (falling water) that has fallen to the surface of the earth flows out along with the pollutants on the ground, flows into the collecting pipe, etc. and flows to the river or river. Pollutants with discharge paths in such a wide area are called nonpoint sources, and these nonpoint sources cause deterioration of water quality.

In order to protect the water quality according to non-point pollution sources, various flow water treatment devices including filter media or screens have been developed.

The present applicant has also developed a staircase water purification device installed on a levee as disclosed in Korean Patent Publication No. 10-1025581 for the purpose of filtering pollutants contained in running water to prevent contamination of rivers and the like. 1 is shown.

The water purification device includes a purification tank 10 installed in a stepwise manner, a partition wall 11 dividing the interior of the purification tank 10 and spaced apart from a bottom of the purification tank 10, and the purification The purification tank (10) comprises a purification block (12) accommodated in the inner space of the water tank (10) and aeration (13) protruding from the rear of the water purification tank (10). It is composed.

By the way, the water purification device is a blockage of the purification block 12 is easily occluded in the process of being filtered due to contaminants, such as sand, mud, vinyl and household waste, etc. contained in the flowing water flowing into the upstream purification tank, the next stage purification tank There is a problem that the water filtration device does not perform its role, such as immediately blocked.

On the other hand, as another apparatus that can increase the purification efficiency is disclosed in the initial excellent purification treatment device in Patent Publication No. 10-0779513, it is shown in Figure 2 attached. The initial excellent purification treatment device is provided with a wedge wire screen 21 provided in the pre-treatment tank so as to filter out contaminants and solids from the initial rain introduced through the inlet 20 and the initial rain introduced during the rainfall. And, the lower portion of the wedge wire screen 21 is provided with a filter barrel 22 containing fine particles, the main cartridge 24 and the auxiliary cartridge 26 for filtering the initial excellent water passing through the filter barrel 22 and It consists of a lower outlet port 25 and the upper outlet port 27 for discharging the initial excellent water filtered in the main cartridge 24 and the auxiliary cartridge 26, respectively.

However, the initial excellent water purifier also has a problem in that the wedge wire screen 21 is easily occluded by sand, mud, vinyl and household waste, in particular, contained in rainwater. Accordingly, the necessity of a device capable of sequential filtration of contaminants and the like contained in the flowing water (or initial rainwater) in size order has emerged.

In addition, conventional sedimentation tanks are dug up the floor and install the formwork to cast concrete inside the formwork and cure it, which is required. There was a problem that the construction period is long and the construction cost is increased.

The present invention has been made to solve the above problems and to meet the necessity of a device capable of sequentially filtering the contaminants in the size order, the present invention is filtered by sequentially filtering the contaminants contained in rainwater or running water in the order of size It is an object to provide a multiple filtration settler that can prevent or at least delay the blockage of the device.

Another object is to provide a sedimentation tank for multiple filtration which can easily clean the occluded filtration device.

It is another object to provide a multiple filtration settling tank that can be quickly and simply installed prefabricated settling tank.

Multi-filtration settling tank according to the present invention for solving the above problems and the bottom; An outer wall installed at left and right sides of the bottom portion; A plurality of partition walls installed between the outer walls provided at the left and right sides; A filtration unit comprising a plurality of filter tanks installed between the partition walls and a plurality of filter networks installed in the plurality of filter tanks; In the multiple filtration sedimentation tank consisting of a cover portion covering the upper space between the outer wall, the size of the screen sieve provided in the filter net is characterized in that the smaller from the upstream to downstream.

According to the present invention, by installing a plurality of screens of the screen sieve becomes smaller gradually selectively filter the contaminants corresponding to the pore size of the filter network to significantly delay the blockage, and the earth and sand heavier than water is Sedimentation of contaminants in running water can be effectively carried out by precipitation on the screen support by a channel.

In addition, the contaminants, etc. filtered by the filter net configured inside the filter part can be easily separated and removed from the settling tank to remove the contaminants, thereby facilitating cleaning.

In addition, the sedimentation tank can be constructed quickly and simply by assembling in the field.

1 is a cross-sectional view of a staircase water purification device installed on a conventional embankment,
2 is a sectional perspective view of a conventional initial excellent purification treatment apparatus,
3 is a perspective view of a precipitation tank for multiple filtration according to the present invention,
4 is an exploded perspective view of a precipitation tank for multiple filtration according to the present invention;
5 is a cross-sectional view of a multiple filtration settling tank according to the present invention,
6 is an installation perspective view of the foundation pile according to the present invention;
7A, 7B, and 7C are plan views showing bottom shapes according to the present invention;
8 is an exploded perspective view of an outer wall prefabricated according to the present invention;
9 is a flow chart of the flow in the settling tank for multiple filtration according to the present invention,
10 is a perspective view of a precipitation tank for multiple filtration according to the present invention,
11 is an exploded perspective view of a settling tank according to another embodiment of the present invention;
12 is an exploded perspective view of the connecting body according to the present invention.

Hereinafter, the settling tank for multiple filtration according to the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a sedimentation tank for multiple filtration that can sequentially filter the contaminants contained in the running water, can easily discharge the filtered contaminants, and can be easily assembled and installed, Figures 3 to 5 of the accompanying drawings Respectively shows a perspective view, an exploded perspective view and a cross-sectional view of a multi-filtration settling tank according to the present invention, the configuration is largely the bottom portion 200, the outer wall 300, the partition wall 400, the filtering portion 500 and the cover portion ( 600).

First, the foundation pile 100 is vertically installed on the ground to which the facility is to be installed according to the size and shape of the facility as shown in FIG. 6 so that the bottom part and the outer wall can be installed in a prefabricated manner to form the submerged tank. In the method of installing the foundation pile 100, a hole may be drilled in the ground and the foundation pile 100 may be inserted into the hole, or the foundation pile 100 may be directly hit on the ground.

The shape of the foundation pile 100 may be a variety of shapes, such as a round rod, a square rod, H-shaped steel, I-shaped steel, the material is preferably made of stainless steel resistant to corrosion, but a hole and a foundation pile drilled in the ground It is also possible to prevent the occurrence of rust, etc. by injecting concrete between the (100).

Next, the bottom portion 200 is a portion forming the bottom of the facility is provided with a hole 201 on the outer periphery of the bottom portion 200 to be fitted to the foundation pile 100. At this time, the hole 201 provided in the bottom portion 200 is formed to be the same as the interval of the foundation pile 100, of course. The bottom 200 is made of pre-made concrete, that is, PC (precast) concrete.

The bottom portion 200 may be formed of one plate or may be formed of a combination of a plurality of plates. More specifically, the bottom plate 200 may be configured as shown in FIGS. 7A to 7C of the accompanying drawings in order to enhance the mutual bonding force. FIG. 7A illustrates a structure in which “a” shape PC concrete 210 and “b” shape PC concrete 220 are repeatedly coupled to each other. FIG. 7 b illustrates “I” shape PC concrete 230 in which “I” shape PC concrete ( 240 is coupled to the structure, Figure 7c shows a "c" shape PC concrete 250 is a structure that is fitted to the "+" shape PC concrete 260 is coupled. The bottom portion 200 is characterized in that the plate is arranged to cross each other in the horizontal or vertical direction, in addition to the above-mentioned, in addition to the above-mentioned each of the above-mentioned PC concrete can be implemented in a mixed form, such as various modifications Can be carried out. According to this coupling structure, the bonding force between sides can be enhanced to form a more firm bottom.

Next, the outer wall 300 is installed by an assembling method or a concrete placing method, the concrete placing method is a well-known technique, a detailed description thereof will be omitted, and the assembly method will be described below.

The outer wall 300 constitutes the outer periphery of the settling tank, and is made of PC concrete, and is composed of an outer wall block 310 having at least two holes penetrating the foundation pile 100. The interval between the holes 301 formed in the outer wall block 310 is formed to be equal to the interval between the holes formed in the foundation pile 100 and the bottom plate 200. In addition, the interval between the hole formed on the outer side of the outer wall block 310 and the edge of the outer wall block 310 is equal to 1/2 of the interval between the holes formed in the foundation pile 100 and the bottom portion 200, of course. to be. In addition, the outer wall block 310 may be formed in a rectangular parallelepiped shape.

The outer wall 300 is formed by sandwiching the outer wall block 310 to the foundation pile 100, in the present invention, the lower block and the upper block are stacked alternately. That is, the outer wall blocks 310 stacked on the upper portion of the outer wall blocks 310 stacked on the bottom are stacked so as to overlap at least two or more. Accordingly, since the outer wall block 310 can be constructed by simply manufacturing the outer wall block 310 in advance and inserting the outer wall block 310 into the foundation pile 100 installed vertically, the construction becomes simple and the construction period is long. Can be shortened. In addition, by stacking blocks up and down with each other, the bonding force between the blocks and the blocks can be enhanced to form a solid wall.

On the other hand, the partition wall 400 is installed between the outer wall 300 so as to partition a plurality of zones for sediment and sediment from the flowing water flowing into the sedimentation tank by the history-funded channel principle. The partition 400 has a first partition 410 having an upper portion open to inflow water, a second partition 420 spaced apart at a predetermined interval from the bottom portion 200 to open a lower portion, and an upper portion thereof. The third partition 430 is partially opened, the fourth partition 440 spaced apart from the bottom portion 200 by a predetermined interval and the upper portion is opened to discharge the filtered water in the settling tank It consists of five partitions 450. In this case, the partition wall 400 may be configured by installing an angle or a flange in the vertical direction in the inner side of the outer wall 300, but as described later, the partition wall block 401 on the outer wall 300 without installing such an angle or the like. ) Can be installed by inserting

As the plurality of partitions 400 are installed, the first filtration tank 511 is partitioned by the first partition 410 and the second partition 420, and the second partition 420 and the third partition 430 are provided. The second filtration tank 512 is partitioned and provided by the third partition 430 and the fourth partition 440, the third filtration tank 513 is partitioned, and the fourth partition 440 and the fifth partition. A discharge tank 514 partitioned by the 450 is provided.

Therefore, the flowing water flows into the first filtration tank 511 of the sedimentation tank through the upper part of the first partition 410, and the flowing water of the first filtration tank 511 passes through the lower part of the second partition 420. The flow of the second filtration tank 512 is transferred to the third filtration tank 513 through the upper portion of the third partition 430, and the flow of the third filtration tank 513 is lower than the fourth partition 410. It is transferred to the discharge tank 514 through the discharge.

As mentioned above, the partition wall 400 may also be configured to be installed by being inserted into the outer wall block 310 without the installation of an angle, etc., which will be described with reference to FIG. 8 of the accompanying drawings.

Figure 8 shows an exploded perspective view of the outer wall made of a prefabricated in the present invention, first of all in the present invention to have a cutting groove 350 that can be assembled by fitting the partition wall 400 to the outer wall (300) The outer wall block 310 is proposed, and the shape of each of the outer wall blocks 310 is a first block 320 having a first cutout portion 321 formed at an inner center thereof, and a second cutout portion 331 formed at an inner edge side thereof. May be formed as a second block 330 formed with a third block 340 having a third cutout 341 symmetrically with the second block. Accordingly, the outer wall 300 of the portion in which the partition block 401 is inserted pairs the first block 320 in which the first cutout 321 is formed, and the second wall so as to correspond to the first cutout 321 thereon. The second block 330 and the third block 340 are stacked so that the cutout 331 and the third cutout 341 face each other, and if this is repeated, the cutout groove 350 in which the cutout is spoken in the vertical direction is formed. Is formed. Accordingly, the inner wall 400 is formed by stacking the partition block 401 along the cut groove 350 formed in the outer wall 300. The partition block 401 may also be made of PC concrete, like the bottom plate 200 and the outer wall block 310.

Here, the partition wall block 401 may be a unit block forming the first to fifth partition walls, and may constitute a partition wall having an upper portion open according to the number of stacking assembly of the partition block, or a partition wall having an open lower portion may be formed.

Referring to FIG. 4 of the accompanying drawings, the first partition 410, the third partition 430, and the fifth partition 450, which are open at the top, are cut outs 350 and over the entire upper and lower portions of the outer wall 300. In order to form a) by sequentially stacking the partition block 401 from the bottom to the upper portion can be opened by removing the partition block 401 as much as you want to open. In this case, the stacking height of the fifth partition wall 450 may be configured to be lower than that of the first partition wall 410 and the third partition wall 430 to minimize the amount of running water remaining in the settling tank during the dry season.

In addition, the second partition 420 and the fourth partition 440 having the lower opening are stacked to the outer wall block 310 without the cutout to the height to be opened, and the first block to form the cut groove 350 from the height to be partitioned. (320), the second block 330 and the third block 340 is configured so that the partition block 401 is inserted into the insert so that the lower portion is opened so that the lower portion is open.

As the water inside the ground may be introduced into the inside or the water inside may leak to the outside through the outer wall 300 and the partition 400 assembled as described above, the outer wall and the partition wall are treated with water to remove leakage of the inflowed water. It can prevent. There are various methods of order treatment, which belongs to a known technique and detailed description thereof will be omitted.

In addition, the upper part of the space between the outer wall 300 is sealed by the cover part 600, which is a hollow part 612 formed therein as shown in FIG. 3 of the accompanying drawings. And a cover auxiliary body 610 having a step 611 on the inner wall thereof, and a cover 620 configured to be caught by the step 611 and sealing the hollow part 612. have. In this case, the cover 620 may further include a handle 621 as a means for lifting the cover 620 to clean the filter unit 500.

Since the outer wall and the partition wall configured as above can be assembled and assembled, the blocks can be pre-fabricated, cured, stored, stored, and transported to the site where they are constructed. It can work. In addition, the outer wall block and the outer wall block is firmly coupled between the excellent durability, there is an advantage that can be installed by expanding or reducing the size of the facility according to the site situation.

On the other hand, as a configuration for collecting and filtering the contaminants contained in the running water, each filtering tank is provided with a filtering net 520, the filtering net 520 is the first filtration net 521 is installed in the first filtration tank 511 and And a second filtration network 522 installed in the second filtration tank 512 and a third filtration network 523 installed in the third filtration tank 513.

The first filtration network 521 primarily filters the contaminants in the flowing water, the upper part of which is open and the lower and side surfaces of the first screen 521a having a large sieve, and the first screen 521a of the first filtration net. It consists of the screen support body 521c installed inward.

The second filtration network 522 is open at the top and the second inner screen 522a consisting of the bottom and the side of the screen, and installed outside the second inner screen 522a, the top is open and the bottom and the side of the screen The second outer screen 522b and the second inner and outer screens 522a and 522b each include a screen support 522c installed therein.

The third filtration net 523 is open at the top and the third inner screen 523a consisting of the bottom and the side of the screen, and installed outside the third inner screen 523a, and the top is open, and the bottom and the side are the screen. The third outer screen 523b and the third inner and outer screens 523a and 523b each include a screen support 523c installed therein.

In addition, each screen is provided with a handle 501a so as to facilitate cleaning by separating the screen from the screen support when the screen is occluded.

At this time, the size of the mesh forming the screen is determined according to the flow of the flow of water, that is, as the flow of water flows from the upstream to the downstream, that is, the first screen 521a, the second outer screen 522b, the second inner screen 522a ), The third inner screen 523a and the third outer screen 523b are arranged so that the grid of the screen becomes smaller.

As a result of uniform filtration in the entire filtration section according to the size of the contaminants, it is possible to considerably delay the blockage of the filtration section, and as a result, the ability to filter the contaminants in the running water is increased. Soil and the like that is heavier than water can be effectively removed from the runoff by precipitation on the screen support.

Here, the soil and sediment introduced into the sedimentation tank is settled on the bottom of the sedimentation tank. At this time, the bottom and the side of the bottom side are closed to the screen support for supporting the screen so that the sediment is deposited on the bottom of the screen support. It is configured to settle, but not to completely close the lower opening of the partition wall 400 by the sealing of the bottom side. Accordingly, the non-sealed side of the screen support may be made of a lattice, or may seal the remaining portion except the opening. In addition, the screen support may be configured to be inserted and withdrawn to the filter unit 500, the handle 502a may be provided to facilitate insertion and withdrawal.

Accordingly, if necessary, only the screen may be separated and extracted from the screen support, or the screen support may be taken out of the filtration tank to remove impurities, as well as to remove the sediment, so that the cleaning of the settling tank may be easily and quickly performed.

9 of the accompanying drawings shows a flow chart of the flow in the sedimentation tank for multiple filtration according to the present invention, looking at the flow of the flow of water flowed into the sedimentation tank, the flow of introduced water flows into the first filtration tank 511 while the first filtration network ( Through 521, the filth is first filtered from the first filtration network 521. The water level in the first filtration tank 511 and the second filtration tank 512 while the water level of the first filtration tank 511 and the second filtration tank 512 rises at the same time, delays the staying time, so that the sediment The sediment is deposited on the bottom of the screen support and the flow of water through the second filtration tank 512 is sequentially passed through the second outer screen 522b and the second inner screen 522a of the second filtration network 522. In the third way, the contaminants are filtered and moved to the third filtration tank 513. The flow of water flowing into the third filtration tank 513 is sequentially passed through the third inner screen 523a and the third outer screen 523b of the third filtration network 523, and contaminants are filtered through the fourth and fifth cars. It is moved to the discharge tank 104. The flowing water moved to the discharge tank 105 is discharged through the upper portion of the fifth partition wall as the water level rises.

As described above, according to the present invention, the precipitate precipitates under the screen support 501 by the flowing water of the insufficient water channel, and the contaminants and the like are filtered through the screen.

Figure 10 of the accompanying drawings shows a perspective view of a multi-filtration settling tank of another embodiment according to the present invention, this structure is a structure that can be constructed when the left and right width of the settling tank is the structure of the accompanying drawings The precipitation tank shown in FIG. 3 is expanded in parallel. The sedimentation tank of such a structure is made of a partition wall and a partition wall to enhance durability and increase the resistance supported by the left and right lateral pressure to build a more solid precipitation tank.

11 and 12 of the accompanying drawings shows a structure that can be partitioned by using a flange installed vertically in the interior of the wide filtration settling tank of the present invention, the partition wall 400 in this structure Between the partition wall 400 and the rectangular parallelepiped support 460 is installed on the bottom portion 100, extending in the vertical direction on the upper surface of the support 460 and is installed perpendicular to the support 460 The connecting body 470 is provided with a flange 472 in the front, rear, left and right directions. Accordingly, the partition wall 400 is formed by stacking the partition block 401 between the groove formed in the connecting body 470 and the cut groove 350 formed in the outer wall. Although not shown in the drawing, each space partitioned by the partition wall 400 may be provided with a filtration unit 500 to filter impurities and sediments in a large amount of running water, and also to support a solid inside and outside to form a solid sedimentation tank. have.

According to the present invention, by installing a plurality of screens of the screen sieve becomes smaller gradually selectively filter the contaminants corresponding to the pore size of the filter network to significantly delay the blockage, and the earth and sand heavier than water is Sedimentation at the bottom by the channel can effectively remove the contaminants from the running water.

In addition, the contaminants or the like filtered by the filter network configured inside the filter medium can be easily separated and extracted from the settling tank to easily remove the contaminants, thereby facilitating cleaning.

In addition, the sedimentation tank can be constructed quickly and simply by assembling in the field.

100: basic file
200: bottom 300: outer wall
300: outer wall block 301: hole
320: first block 321: first incision
330: second block 331: second incision
340: third block 341: fourth incision
350: incision groove
400: partition 410: first partition
420: second partition 430: third partition
440: fourth partition 450: fifth partition
500: filtration unit 510: filtration tank
520: filter network 600: cover

Claims (13)

A bottom portion 200;
An outer wall 300 installed at left and right sides of the bottom part 200;
A plurality of partition walls 400 installed between the outer walls 200 installed at the left and right sides;
A filtering unit 500 including a plurality of filtration tanks 510 installed between the partition walls 400 and a plurality of filtration nets 520 installed in the plurality of filtration tanks 510;
In the multi-filtration settling tank consisting of a cover portion 600 covering the upper space between the outer wall 300,
The size of the screen 521 sieve installed in the filter net 520 is smaller in size from the upstream to downstream, characterized in that the settling tank for filtration.
The method according to claim 1,
The bottom portion 200 and the outer wall 300 are provided with holes 201 and 301 penetrating up and down, respectively, and further includes a foundation pile 100 penetrating the hole and installed perpendicular to the ground. Multiple filtration settling tank.
The method according to claim 2,
The outer wall 300 is made of PC concrete, and the outer wall block 310 having at least two or more holes 301 penetrating up and down in the foundation pile 100 are staggered vertically on the foundation pile 100. Multi-filtration settling tank, characterized in that the stack is sandwiched.
The method according to claim 3,
The outer wall block 310 adjacent to the partition 400 has a first block 320 having a first cutout 321 formed at an inner center thereof, and a second block formed with a second cutout 331 formed at an inner edge thereof. 330, and a third block 340 having a third cutout 341 symmetrically with the second block.
The second block 330 and the third block 340 are installed such that the second cutout 331 and the third cutout 341 face each other, and the second block 330 and the second cutout 331 are installed to face each other. The cutouts 350 are formed in the cutout portion formed of three blocks 340 so as to correspond to the first cutout portion 321 of the first block 320 to be formed in the vertical direction.
The sedimentation tank for multiple filtration, characterized in that the partition wall 400 is formed by stacking the partition brick 401 between the cut groove 350 and the cut groove 350 formed in the outer wall 300.
The method of claim 4,
A support body 460 having a rectangular parallelepiped shape between the partition wall 400 and the partition wall 400, extending vertically and vertically, standing vertically on the support 460, and a flange 472 formed in front, rear, left, and right directions. Multiple filtration settling tank, characterized in that it further comprises (470).
The method according to claim 1,
The barrier rib 400 may include a first barrier rib 410 having an upper portion opened therein, a second barrier rib 420 having an lower portion opened, a third barrier rib 430 having an upper portion opened, and a lower portion thereof open at the bottom portion thereof. Fourth partition 440 and the multi-filtration settling tank, characterized in that consisting of the fifth partition 450 is opened at the top to discharge the running water.
The method of claim 6,
The filtration tank 510 is partitioned by the first filtration tank 511 partitioned by the first partition 410 and the second partition 420, and by the second partition 420 and the third partition 430. By the second filtration tank 512, the third filtration tank 513 partitioned by the third partition 430 and the fourth partition 440, and the fourth partition 440 and the fifth partition 450. Multiple filtration settling tank, characterized in that consisting of a discharge tank 514 partitioned.
The method of claim 7,
The filtering net 520 is installed in the first filtration net 521 installed in the first filtration tank 511, the second filtration net 522 and the third filtration tank 513 installed in the second filtration tank 512. Multiple filtration settling tank, characterized in that consisting of a third filtration network (523).
The method according to claim 8,
The first filtration net 521 is composed of a first screen 521a having an upper portion and a bottom and a side portion having a screen, and a screen support 521c having the first screen 521a installed therein. Precipitation tank for multiple filtration.
The method according to claim 8,
The second filtration network 522 is open at the top and the second inner screen 522a consisting of the bottom and the side of the screen, and installed outside the second inner screen 522a, the top is open and the bottom and the side of the screen The second outer screen (522b) and the second inner and outer screens (522a, 522b) consisting of a screen support 522c, which is installed on the inside, characterized in that the filtration tank for multiple filtration.
The method according to claim 8,
The third filtration net 523 is open at the top and the third inner screen 523a consisting of the bottom and the side of the screen, and installed outside the third inner screen 523a, and the top is open, and the bottom and the side are the screen. The third outer screen 523b and the third inner and outer screens 523a and 523b are composed of a screen support 523c installed therein.
The method according to any one of claims 9 to 11,
The screen support is the bottom and the bottom side is closed, the multiple filtration settling tank, characterized in that configured to enable insertion and withdrawal in the filter (500).
The method of claim 12,
The non-sealed side of the screen support is a multi-filtration settling tank, characterized in that consisting of a screen.

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