KR101027448B1 - Apparatus for purifying waste water - Google Patents

Abstract

PURPOSE: An apparatus for purifying waste water is provided to improve the cleaning performance of a filtering unit by introducing waste water from the outside to the inside of the filtering unit. CONSTITUTION: An apparatus for purifying waste water includes a waste water treating bath(10), a filtering unit(20), a purified water draining pipe(30), and a cleaning unit(40). The cleaning unit includes a rotary pipe(41), a driving unit(50) rotating the rotary pipe, and a plurality of inhaling units(60) installed to the rotary pipe, a flowing path connecting unit(45), an inhaling pipe(46), and an inhaling pump. The inhaling units are radially expanded from the rotary pipe.

Description

Wastewater Purification System {APPARATUS FOR PURIFYING WASTE WATER}

The present invention relates to a sewage purification apparatus, and more particularly, to an energy-saving sewage purification apparatus that can filter and purify sewage through a filter member and wash the filter member by itself.

Household sewage discharged from homes and wastewater discharged from factories contain various suspended matters and sewage. The sewage purification device is a device for filtering and filtering various suspended matters and dirt from such waste water.

Korean Patent Publication No. 10-522906 discloses a sewage purification apparatus for purifying sewage in such a manner that sewage passes through a rotating disk-shaped filter member. As shown in FIG. 1, the filthy water purification apparatus is provided with a central drum 1 into which filthy water flows, and a plurality of disc filter elements installed around the drum 1 for filtration of filthy water and rotated by driving of a motor. (2) and a washing device (3) provided above the filter member (2) so as to wash the filter member (2) by spraying high-pressure washing water on the outer surface of the filter member (2). In addition, it is provided with a trough (4, trough) for receiving the dirt flowing down from the inside of the filter member (2) during the cleaning to discharge to the outside.

The sewage purification apparatus is introduced into the inside of the filter member 2 in which the sewage supplied to the drum 1 in the center rotates, and is filtered while being discharged to the outside through the filter member 2. The filtered suspended matter or dirt accumulates inside the filter member 2, and the purified water passing through the filter member 2 is discharged to the outside through the discharge port 5a of the treatment tank 5. When the washing is performed, high-pressure washing water is sprayed to the outer surface of the filter member 2 while the filter member 2 is rotated, so that suspended matter or dirt inside the filter member 2 falls into the tub 4 and is discharged.

However, since the sewage purification apparatus is introduced into the inside of the filter member 2 rotating through the drum 1 and discharged to the outside, suspended matter or dirt is attached or accumulated inside the filter member 2. Therefore, despite the cleaning of the filter member 2, there is a problem that as the use becomes longer, the floating particles floating in the filter member 2 increase (as the concentration of the internal suspended solids increases), thereby reducing the amount of purified water of the sewage. In particular, this apparatus has a problem that the purification efficiency is low because purification of the sewage is made only in the lower region of the filter member (2).

In addition, since the filthy water purification apparatus cleans the dirt attached to the inside of the filter member 2 by washing the sprayed water from the outside of the filter member 2 when the filter member 2 is washed, the washing efficiency is not only low, but also the washing water requirements are required. There were many drawbacks. In addition, it is difficult to partially replace the filter member 2, so that it is difficult to maintain, and when the filter member 2 is replaced, the operation has to be stopped.

In addition, such a wastewater purification device has a big problem of energy loss because it has to rotate the filter member 2 in the purification process and operate the high pressure pump for spraying the washing water while rotating the filter member 2 while washing.

The present invention has been made in view of these points, and an object of the present invention is to provide a sewage purification apparatus to increase the purification efficiency of the sewage and the cleaning effect of the filter member.

Another object of the present invention is to provide a sewage purification apparatus which can easily maintain the equipment and minimize the consumption of energy.

Sewage purification apparatus according to the present invention for achieving this object and a sewage treatment tank containing the sewage; A plurality of filter members disposed in the sewage treatment tank in a submerged state and provided with filtration parts on both sides thereof so that the sewage may be introduced into and purified from the sewage treatment tank, and a purified water flow path through which purified water flows; ; A purified water discharge pipe connected to each filter member so as to communicate with the purified water flow path; And a washing apparatus for washing dirt on the outer surface of each filter member, wherein the washing apparatus is installed in the sewage treatment tank so as to penetrate through the center of each filter member and has a plurality of flow paths inside thereof corresponding to each filter member. A rotary tube partitioned and formed with a plurality of communication holes such that each of the flow paths communicates with the outer surface thereof; A driving device for rotating the rotary tube; A plurality of suction units mounted to the rotary tubes so as to be close to the filtration units of the respective filter members, communicating with the inside of the rotary tubes through a flow path, and having suction ports formed on the side facing the filter members; A plurality of flow path connecting members surrounding and surrounding the communication hole of the rotary tube; A plurality of suction pipes connected to communicate with each of the flow path connecting members and extending to the outside of the sewage treatment tank; It characterized in that it comprises a suction pump connected to each suction pipe to suck the water and dirt by applying a suction force to each suction pipe.

Each of the suction pipes is characterized in that the opening and closing valve for selectively opening and closing each suction pipe is installed.

The suction unit extends in the radial direction from the rotary tube side and has a flow passage therein, the suction member having the suction port formed on the side facing the filter member, and the suction member connected to the rotary tube to support the suction member. And a support tube for communicating the flow path of the member with the flow path inside the rotary tube.

The support tube is characterized in that the first flange portion provided at one end thereof is detachably fastened to the second flange portion provided on the rotary tube.

The first flange portion is characterized in that the long hole is formed at each position where the bolt is coupled to adjust the mounting position of the first flange portion.

Each filter member is characterized in that it comprises a tube inlet portion cut from the center portion through which the rotary tube penetrates so as to be exchangeable without separation of the rotary tube.

The filtration part of the filter member is characterized in that it comprises a filtration member for filtering dirt, an inner support for supporting the inner surface side of the filtration member, and an outer support for supporting the outer surface side of the filtration member.

The filter member may include a discharge guide provided at an upper portion thereof to guide the water of the purified water flow path toward the discharge pipe, and a connection device provided at the discharge guide to connect the discharge pipe.

The sewage treatment apparatus further comprises a stirring blade provided in at least one of the suction unit or the rotary tube to agitate the sewage in the sewage treatment tank.

The sewage purification apparatus according to the present invention has the effect that the filter members are completely submerged in the sewage treatment tank, and almost all regions of each filter member are used to purify the sewage, thereby increasing the sewage purification efficiency. In addition, there is an advantage that the size of the device can be miniaturized by the high efficiency of sewage purification.

In addition, in the wastewater purification apparatus according to the present invention, since the water of the sewage treatment tank is purified while flowing from the outside of each filter member to the inside, dirt or suspended matter filtered by each filter member is attached to the outside of each filter member. Since the suction member outside the filter member sucks and discharges it with a strong suction force, there is an effect of increasing the washing effect of the filter member.

In addition, the sewage purification apparatus according to the present invention selectively operates the on / off valves of each suction pipe while performing the washing operation, so that the suction power of the suction pump can be alternately acted on any one filter member, thereby increasing the cleaning power of each filter member. There is an effect that can be further increased.

In addition, the sewage purification apparatus according to the present invention can separate and replace each filter member individually, and there is no need to separate the suction pipe during the replacement of the filter member, and the filter member can be replaced while performing the purification operation. There is an advantage that the maintenance of the device is easy.

In addition, the sewage purification apparatus according to the present invention is because the height of the discharge pipe is lower than the water level of the sewage treatment tank can perform the purification of the sewage as the water flows naturally without inputting additional energy, and also a washing device for cleaning the filter member Since only a short time when the cleaning operation is performed there is an effect that can minimize the consumption of energy.

1 is a perspective view of a conventional sewage purification apparatus.
2 is a cross-sectional view showing the internal configuration of the wastewater purification apparatus according to the present invention.
Figure 3 is a perspective view showing the configuration of the filter member and the cleaning device of the sewage purification apparatus according to the present invention.
Figure 4 is a cross-sectional view showing the configuration of the filter member and the suction unit of the sewage purification apparatus according to the present invention.
FIG. 5 is a cross-sectional view taken along the line VV ′ of FIG. 4.
6 and 7 are different cross-sectional views of the wastewater purification apparatus according to the present invention, each showing another embodiment of the stirring blade.
Figure 8 is a perspective view of the filter member and the suction unit of the sewage purification apparatus according to the present invention, showing another embodiment of the purified water discharge passage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Sewage purification apparatus according to the present invention, as shown in Figure 2, the sewage treatment tank 10 containing the sewage, such as domestic sewage or factory wastewater, and a plurality of filter members installed in the immersion state in the sewage treatment tank 10 20, a discharge pipe 30 connected to the filter members 20 for discharging the purified water, and a washing device 40 for removing dirt or suspended matter attached to the filter member 20.

The sewage treatment tank 10 is in the form of a square tank with an open top, and a sewage inflow pipe 11 through which sewage is introduced is connected. The sewage treatment tank 10 is a conventional low speed agglomeration reaction tank that can accommodate sewage for purification treatment. Moreover, the form is not limited to a rectangular tank. The sewage inflow pipe 11 may also be installed in a manner of being connected to the sewage treatment tank 10 or may be installed in a manner of entering through the upper opening of the sewage treatment tank 10. The upper part of the sewage treatment tank 10 may also be opened and closed by a cover.

3 and 4, the filter member 20 is provided in the form of a square panel and the water passes through both sides so that the sewage of the sewage treatment tank 10 can be purified as it flows into the interior. The filter unit 21 is provided, and a purified water flow path 26 through which purified water flows between both filter units 21. The purified water flow passage 26 is formed by spaced spaces between the two side filtering portions 21. The filter members 20 are installed in a plural number in the sewage treatment tank 10 so as to face each other in the form in which the filtration units 21 on both sides thereof are spaced apart from each other in the lateral direction.

As shown in FIG. 4, the filtration unit 21 on both sides of the filter member 20 includes a filtration member 22 made of a nonwoven fabric, a porous fiber, or the like, and a grill-shaped inner side supporting the inner surface side of the filtration member 22. The support 23 and the outer support 24 in the form of a metal mesh or grill to support the outer surface side of the filtering member 22. This is to allow the sewage inside the sewage treatment tank 10 to be purified while flowing through both side filtering members 22 toward the purified water flow passage 26, and the filtering members 22 have inner and outer support portions 23 and 24. It is supported by) to maintain its shape.

Discharge guide portion 27 for guiding the water in the purified water flow path 26 toward the discharge pipe 30 at the upper portion of each filter member 20, and discharged to connect each filter member 20 to the discharge pipe 30. A connecting device 28 is provided at one end of the guide part 27. Purified water in the purified water flow passage 26 is to be discharged to the discharge pipe 30 through the discharge guide portion 27 of the upper side. The connection device 28 may be made of a conventional pipe connection coupling or connection socket or the like so that each filter member 20 can be separately separated and exchanged.

As shown in FIG. 2, the discharge pipe 30 is connected to the plurality of filter members 20 to guide the discharge of purified water while passing through each filter member 20. In addition, the discharge pipe 30 is installed in the immersion state in the sewage contained in the sewage treatment tank 10 so that the purified water can be naturally discharged. The water level of the sewage treatment tank 10 is set higher than the height of the discharge pipe 30 so that water flows naturally toward the discharge pipe 30 by the head difference. This is to ensure that the water of the sewage treatment tank 10 is purified by flowing into each filter member 20 and then naturally discharged through the discharge pipe 30 so that energy is not required to perform the purification treatment. To this end, a water level sensor 13 for controlling the water level may be installed on the top of the sewage treatment tank (10).

8 illustrates another embodiment of a discharge passage through which purified water is discharged. This shows an example in which the discharge pipes 30a extending from the filter member 20 to the outside of the sewage treatment tank 10 are discharged through the drainage passage 60 such as an open sewage system. Each discharge pipe 30a may be provided with valves 35 for selectively opening and closing the discharge pipe 30a.

The washing device 40 for washing each filter member 20 is a rotary tube 41 installed in the sewage treatment tank 10 so as to pass through the center of each filter member 20 as shown in FIGS. And a driving device 50 for rotating the rotary tube 41 and a plurality of suction units 60 installed in close proximity to each filter member 20 and rotating together with the rotary tube 41.

Both ends of the rotary tube 41 are rotatably supported by the sewage treatment tank 10, and a space therein is formed by a flange-shaped partition 42 provided at approximately an intermediate point between the respective filter members 20. A plurality of flow paths 41a, 41b, 41c, and 41d are partitioned so as to correspond to the number of filter members 20. The rotary tube 41 may be manufactured by connecting a plurality of pipes having flanges at both ends thereof to match their centers. In addition, a communication hole 43 is formed in the rotary tube 41 at each point where the filter member 20 is positioned so that the internal flow passages 41a, 41b, 41c, and 41d communicate with the outer surface thereof.

As shown in FIG. 2, the driving device 50 is installed on the top of the sewage treatment tank 10 and includes a driving motor 51 having a reduction gear device and a driving sprocket 52 connected to the shaft of the driving motor 51. ), A driven sprocket 53 installed in the rotary tube 41 inside the sewage treatment tank 10, and a chain 54 connecting the driving sprocket 52 and the driven sprocket 53. When the driving motor 51 is rotated, the rotary tube 41 is to be rotated. Here, although the driving motor 51 and the rotary tube 41 are shown connected by the chain 54, but not limited to this, the drive motor is connected to the shaft connected to the rotary tube 41 outside the sewage treatment tank 10. It may be connected directly.

3 and 4, the suction units 60 extend in the radial direction from the rotary tube 41 side and have a flow path 61a therein and a suction port on the side facing the filter member 20. The suction member 61 formed with the 61b and the suction member 61 are connected to and supported by the rotary tube 41 to communicate the flow path 61a inside the suction member 61 with the channel inside the rotary tube 41. It includes a support tube 62 to make. That is, the support tube 62, as shown in Figure 4, one end is connected to the suction member 61 and the other end is coupled to the outer surface of the rotary tube (41). In addition, the support tube 62 is detachably coupled to the first flange portion 63 provided at one end thereof by bolting to the second flange portion 64 provided at the rotary tube 41. In addition, as shown in FIG. 5, the first flange portion 63 of the support tube 62 moves the position of the first flange portion 63 so that the filtration portion 21 and the suction member of the filter member 20 are disposed. Long holes 65 are formed at positions where the bolts are fastened so as to adjust the gap therebetween. This makes it easy to remove or replace the suction unit 60 for troubleshooting, and at the same time, adjust the mounting position of the first flange portion 63 to thereby separate the gap between the filter member 20 and the suction member 61. It is to be adjusted. The two suction units 60 on both sides of each filter member 20 are installed to face in opposite directions so as to achieve smooth rotation and balance.

In addition, the cleaning device 40 is connected to communicate with the interior of the plurality of flow path connecting member 45, each of the flow path connecting member 45 partitioned so as to surround around each communication hole 43 of the rotary tube 41 and the sewage treatment It includes a plurality of suction pipes 46 extending to the outside of the tank 10, suction pumps 47 connected to each suction pipe 46 to apply suction to each suction pipe 46 to suck water and dirt.

3 and 4, the flow path connecting member 45 is closed at both ends and provided with a cylindrical shape whose inner diameter is larger than the outer diameter of the rotary tube 41, as if the rotary tube 41 penetrates the center thereof. It is installed outside the rotary tube 41 in the form. And each suction pipe 46 is connected so that one end is in communication with the interior of the flow path connecting member (45). This is to allow the sewage and dirt sucked into the inside of the rotary tube 41 through the suction unit 60 while the rotary tube 41 is rotated to flow into the suction tube 46 through the communication hole (43).

As shown in FIG. 3, each filter member 20 has a lower edge from a central portion through which the rotary tube 41 penetrates to separate each filter member 20 without removing the rotary tube 41. It is provided with a tube inlet portion 29 cut to. This is to separate easily by separating the connecting device 28 from the discharge pipe 30 when lifting the filter member 20 by lifting upward.

3, the flow path connecting member 45 is disposed at the central portion of each filter member 20, and each suction pipe 46 is connected through the pipe entry portion 29 of each filter member 20. After extending downward, it is bent laterally and then bent upwards to extend above the sewage treatment tank 10. And each suction pipe 46 is connected to the suction pump 47 through the connection pipe (48). This is to operate the driving motor 51 while the suction pump 47 is operating to rotate the suction unit 60 to suck and wash the dirt or suspended matter attached to the outside of each filter member 20. .

That is, when the suction pump 47 operates, as shown in FIG. 4, a strong suction force acts on the suction port 61b of each suction member 61 provided to be adjacent to the filtration unit 21 of each filter member 20. Therefore, dirt attached to the outer surface of the filtration unit 21 of the filter member 20 is sucked into the suction member 61 together with the water. At the same time, each suction member 61 is rotated together with the rotary tube 41, as shown in Figure 3, so that it is possible to wash a large area (area reached by the suction member by rotation) on both sides of the filter member 20. have.

Water and dirt sucked into the inside of each suction member 61 are introduced into each flow path inside the plurality of partitioned rotary tube 41, and the suction tube 46 and the communication hole 43 of the rotary tube 41 are connected. It is discharged to the outside via the suction pump 47. At this time, the water and dirt discharged from the suction pump 47 is collected in a separate treatment tank (not shown) provided upstream of the sewage treatment tank 10 and then recycled or recycled to the sewage treatment tank 10 for treatment. It can be processed through the process of.

When the dirt or foreign matter attached to the outside of the filter member 20 is washed in a suction manner, a locally strong suction force acts on the outer surface of the filter member 20 where the suction member 20 is located to suck the dirt or foreign substance. As the position of the suction member 61 is changed by the rotation, a large area of the filtration unit 21 is washed, so that the washing effect of the filter member 20 can be improved as compared with the related art. In other words, washing with a strong suction force than when spraying by washing at a high pressure as in the prior art also has a high cleaning effect and advantageous in energy efficiency. This is because the influence of suction force is much greater than the blowing force acting on the same area.

The cleaning operation can be performed by the user as needed or can be automatically executed periodically by the control means of the device. That is, it can be adjusted according to the concentration of suspended matter (pollution degree) of water flowing in the process of purifying. Preferably, the cleaning operation is performed once every 20 minutes. In addition, the sewage treatment apparatus of the present invention, as shown in Fig. 2 and 3, the electric on-off valve 49a and the manual on-off valve 49b provided for each suction pipe 46 so as to selectively open and close each suction pipe 46. ). This is because when the washing means performs a control operation by the electric opening and closing valve (49a) sequentially open for a set time alternately the suction force of the suction pump 47 alternately acting on any one filter member 20 to wash force This will make it higher. This is possible because the inside of the rotary tube 41 is divided into a plurality of flow paths so that the flow paths for washing the respective filter members 20 are configured separately. Of course, the selective opening and closing of each suction pipe 46 may also be implemented in a manner in which the user selectively operates the manual on-off valve 49b.

In addition, the sewage treatment apparatus of the present invention is provided with a plurality of stirring blades (71, 72, 73) capable of stirring the sewage in the sewage treatment tank 10 while performing the washing operation of the filter member (20). 2 to 4 show the stirring blade 71 is installed on the suction member 61 of each suction unit 60, Figure 6 is a stirring blade 72 is mounted on the rotary tube 41 separately 7, the stirring blade 73 is shown in the form installed in the support tube 62 of each suction unit (60). These stirring blades (71, 72, 73) can be contributed to enhance the purification treatment effect of the filthy water because the stirrer is stirred while rotating with the rotary tube (41).

The following describes the overall operation of such a wastewater purification apparatus.

As shown in FIG. 2, the sewage flowing into the sewage treatment tank 10 through the sewage inflow pipe 11 is filled up to the set water level of the sewage treatment tank 10 in which the water level sensor 13 is installed. The sewage in the sewage treatment tank 10 is purified as it flows into the inside of each filter member 20 through both side filter portions 21 of each filter member 20, and the purified water is purified from each filter member 20. It is discharged to the discharge pipe 30 through the purified water flow path 26 and the discharge guide portion (27).

Since the discharge pipe 30 is lower than the set water level of the sewage treatment tank 10, the water introduced into the sewage treatment tank 10 naturally passes through each filter member 20 and is purified while flowing toward the discharge pipe 30. Thus, the natural flow of water can be used to purify sewage, thus saving energy. In addition, since the filter members 20 are completely submerged in the sewage treatment tank 10 to purify water using almost the entire area of each filter member 20, the purification efficiency may be increased. Therefore, the device can be miniaturized as compared with a conventional device having similar processing capacity.

The cleaning of the filter members 20 can be performed without draining the water during the purification. At this time, the suction pump 47 is operated while the rotary tube 41 is rotated by the driving device 50 so that the dirt attached to both outer surfaces of each filter member 20 is sucked into each suction member 61 together with water. do. The suction port 61b of each suction member 61 is close to the outer surface of both filter portions 21 of each filter member 20 and a strong suction force acts through the suction port 61b, so that the suction port 61b of each suction member 61 is provided on both outer surfaces of each filter member 20. The attached dirt is sucked into the suction member 61 together with the water. The sucked dirt is discharged through each flow path in the rotary tube 41, the flow path connecting member 45, the suction pipe 46, the connection pipe 48, the suction pump 47.

In particular, the present invention by selectively operating the on-off valves (49a, 49b) while performing such a washing operation so that the suction force of the suction pump 47 can be alternately acting on any one filter member 20, each The washing power of the filter member 20 can be further increased.

In addition, this washing operation can be adjusted according to the concentration of suspended solids in the influent, since it is periodically performed approximately once every 20 minutes, each filter member 20 can maintain a good state for purification. The washing operation is carried out while the purifying operation is performed, and since the time is short, the washing operation has little effect on the purifying process. In addition, since the driving motor 51 and the suction pump 47 operate only briefly when performing the washing operation, the consumption of energy due to the washing operation is not very large. In other words, the energy consumption is significantly lower than that of the conventional sewage purification apparatus which requires spraying the washing water with a high pressure pump while continuously rotating the filter members.

When replacing the filter member 20 by long term use, as shown in FIG. 3, it can separate and replace individually as needed. In particular, each filter member 20 is provided with a pipe entry portion 29 can be easily replaced without the need to remove the rotary tube 41 and the like. As such, the present invention can be implemented while performing a purification operation because each filter member 20 can be easily replaced individually. It is not necessary to separate other parts of the device or to drain the water for the replacement of the filter member 20. Therefore, maintenance of the device is easy.

10: sewage treatment tank, 13: water level sensor,
20: filter element, 21: filtration unit,
26: purified water flow path, 27: discharge guide,
29: pipe entry, 30: discharge pipe,
40: washing device, 41: rotary tube,
42: compartment, 43: communication hole,
45: flow path connecting member, 46: suction pipe,
47: suction pump, 48: connector,
49a: electric shutoff valve, 49b: manual shutoff valve,
50: drive unit, 60: suction unit,
61: suction member, 62: support tube,
71, 72, 73: stirring blade.

Claims (9)

A sewage treatment tank for holding sewage; A plurality of filter members disposed in the sewage treatment tank in a submerged state and provided with filtration parts on both sides thereof so that the sewage may be introduced into and purified from the sewage treatment tank, and a purified water flow path through which purified water flows; ; A purified water discharge pipe connected to each filter member so as to communicate with the purified water flow path; It includes a washing device for washing the dirt on the outer surface of each filter member,
The washing apparatus is installed in the sewage treatment tank so as to pass through the center of each filter member, the inside of which is divided into a plurality of flow paths corresponding to the respective filter members, and a plurality of communication so that each divided flow passage communicates with the outer surface thereof. A rotary tube formed with a ball; A driving device for rotating the rotary tube; A plurality of suction units installed in the rotary tube so as to be close to the filtering portions of the respective filter members; A plurality of flow path connecting members surrounding and surrounding the communication hole of the rotary tube; A plurality of suction pipes connected to communicate with each of the flow path connecting members and extending to the outside of the sewage treatment tank; A suction pump connected to each suction pipe to give suction power to each suction pipe to suck water and dirt;
The suction unit extends in the radial direction from the rotary tube side and has a flow path formed therein, the suction member having a suction port formed on the side facing the filter member, and the suction member connected to the rotary tube to support the suction member. Sewage purification apparatus, characterized in that it comprises a support pipe for communicating the flow path of the inner flow path and the rotary tube. The method of claim 1,
Each of the suction pipe is a sewage purification device, characterized in that the opening and closing valve for selectively opening and closing each suction pipe is installed. delete The method of claim 1,
The support pipe is sewage purification apparatus, characterized in that the first flange portion provided at one end thereof is detachably fastened to the second flange portion provided in the rotary tube. The method of claim 4, wherein
Sewage purification device, characterized in that the first flange is formed with a long hole for each position where the bolt is coupled to adjust the mounting position of the first flange. The method of claim 1,
And each filter member includes a pipe entry portion cut from a center portion through which the rotary tube penetrates to an edge thereof so that exchange is possible without separation of the rotary tube. The method of claim 1,
The filtration unit of the filter member comprises a filtration member for filtering dirt, an inner support for supporting an inner surface side of the filtration member, and an outer support for supporting an outer surface side of the filtration member. The method of claim 7, wherein
The filter member includes a discharge guide provided at an upper portion thereof to guide the water of the purified water flow path toward the discharge pipe, and a connection device provided at the discharge guide to connect the discharge pipe. . The method of claim 1,
Sewage purification device further comprises a stirring blade provided in at least one of the suction unit or the rotary tube to agitate the sewage in the sewage treatment tank.

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