KR100959583B1 - Water treatment equipment using plate type and tube type sedimentation module with floc cleaning system by rotation - Google Patents

Abstract

PURPOSE: A water treatment device using a sedimentation module and a sedimentation plate is provided to minimize a settling pond volume with rotation of the sedimentation module, and to minimize a floc sedimentation distance by horizontally installing the sedimentation module and the sedimentation plate. CONSTITUTION: A water treatment device comprises the following: a motor(4) adjusting rotation speed of a settling pond; a rotation center axis(5) connected to the motor or a chain; and a sedimentation module(6) or a sedimentation plate mounted on the rotation center axis. When water passes through the sedimentation module, floc in the water is removed. The rotation center axis is horizontally or vertically formed on the setting pond.

Description

Water treatment equipment using plate type and tube type sedimentation module with floc cleaning system by rotation}

The present invention relates to a water treatment apparatus using a sedimentation module composed of a sedimentation plate and a sedimentation tube capable of rotating washing. There is a motor with a rotational speed control center and a rotation center on the sedimentation basin, and a sedimentation plate sedimentation module or sedimentation tube sedimentation module is mounted on this rotational center axis. By rotating the settling module as a whole, flocs accumulated in the settling module have a structural feature of detachment, floating and washing.

The sedimentation module is composed of sedimentation plates or sedimentation tubes of various materials such as plastic, PVC, polyethylene, FRP (synthetic resin), aluminum, iron, stainless steel, copper, tempered glass, wood, and the flow of water removes sediment. The most efficient horizontal flow and the sedimentation plate or sedimentation pipe constituting the sedimentation module is also mounted horizontally or inclined so that the sedimentation efficiency is better than that of the conventional inclined plate sedimentation basin or inclined tube sedimentation basin.

Unlike the existing inclined plate settling basin, the spacing of the settling plate or the diameter of the settling tube can be made very small, so that the settling efficiency can be greatly improved and the shape of the plate or tube can be variously adopted.

After a certain period of operation, flocs will accumulate in the sedimentation plates or sedimentation tubes, and their removal is essential. The present invention is different from the conventional technique of removing the floc, ie, the sludge caused by the gravity of the sludge, by rotating the settling module by driving a motor, and the relative rotation of the settling plate or settling tube surface constituting the settling module with the accumulated floc. It is a technique that easily removes, floats, and washes flocs due to speed difference, sedimentation plate and sedimentation tube, centrifugal force acting on water, and vortex generated by rotation, and the washing time is sufficient for several seconds to several tens of seconds.

In general, the conventional water treatment process employs chemical flocculation and sedimentation processes. Since microorganisms, dissolved organic and inorganic substances, and colloidal microparticles in raw water are not easily precipitated by gravity, flocculant is administered to flocculate the microparticles and the floc is caused by gravity sedimentation or dissolved air flotation. Removal to relieve the burden of subsequent filter paper.

The sewage treatment process removes suspended solids (SS) to facilitate subsequent biological treatment or to finally precipitate and remove microbial flocs after biological treatment.

In addition, the precipitation process may be adopted even when the phosphorus in the sewage waste water, which is the cause of eutrophication, is removed by coagulation sedimentation method or when the sewage treatment is advanced for sewage reuse.

The main design elements of gravity sedimentation basins are the settling velocity of the floc to be sedimented and the settling distance at the sedimentation basin: depth and residence time. The concept of surface loading or overflow rate considering the sedimentation speed and sedimentation distance is applied. The sedimentation basin is classified into cross flow sedimentation basin and high speed flocculation sedimentation basin. The cross flow sedimentation basin is classified into single layer, multi-layered and inclined plate sedimentation basin, and high speed agglomeration sedimentation basin is classified into sludge circulation type, sludge blank kit type, and complex type.

Among these, the sloped sedimentation basin is a horizontal flow type and an upflow type.

It is obvious that both of these precipitation methods can increase the sedimentation efficiency by maximizing the floc rate and minimizing the sedimentation distance. In order to increase the floc rate of sedimentation, it is important to optimize the type of flocculant used, the injection rate, and the floc formation process, which is an operational problem rather than a structural problem. Structural increase in sedimentation efficiency requires shortening the floc settling distance as much as possible.

The effective depth of cross-flow sedimentation basin is 3 ~ 4m, residence time is 2 ~ 4 hours, sludge deposition depth is more than 30cm. This means that flocs can be removed by sinking up to 3 to 4 m until they have flowed into the settling basin and then out. Therefore, a slow settling floc is unremoved, overflowed and removed from subsequent filter paper.

The sedimentation device which is intended to improve the sediment removal efficiency by significantly shortening the sedimentation distance of the cross-flow sedimentation basin and increasing the sedimentation area is an inclined plate or an inclined tube sedimentation basin.

Cross-flow inclined plate sedimentation basin can be installed in multiple stages, surface load ratio 4 ~ 9㎜ / min, inclined plate inclination angle 60˚, average flow velocity in sedimentation basin is 0.6m / min or less, inclined plate spacing 100mm or more, residence time in inclined plate is interval of inclined plate When it is 100 mm, it is about 20-40 minutes.

The distance between the bottom and the bottom of the device is to be at least 1.5m and the distance between the device and the inlet and outlet walls of the settler is not less than 1.5m. If the swash plate spacing is made too small, there is a possibility of re-injury as the sludge slides down, limiting the minimum spacing.

In the upflow slope pipe sedimentation basin, only one stage of sedimentation device is installed, and the angle of inclination is 60 ° and the average ascending velocity in the sedimentation basin is 80 mm / min or less. In some cases, upflow slope plates may be installed in cross-flow sedimentation basins.

When installing the inclined plate, a device for removing the sludge accumulated on the inclined plate or having a passage in the middle of the inclined plate allows the cleaner to pass. It is preferable that the sludge is discharged downward by automatically sliding downward by the gravity of the sludge using the inclination angle of 60 ° of the inclined plate without draining the water in the sedimentation basin. However, in many cases, the automatic discharge is not smooth. It can be seen that the emission operation concept is not complete. In other words, in a state where the sedimentation basin is drained, a very cumbersome cleaning such as watering between the inclined plates, using a brush, and disassembling cleaning is often required. When the automatic discharge becomes difficult and too much sludge is accumulated on the inclined plate, an accident that the inclined plate is damaged by the load of the sludge also occurs.

In a sloped sedimentation basin, the water flows structurally upward. If the inclined tube is fixed and installed in two or more stages, it is generally installed in one stage because sludge is deposited or drift occurs at the plate bending or folding portion of the sedimentation device, thereby lowering the sedimentation efficiency.

There is a space of about 1.5m below the slope plate or slope pipe sedimentation basin to be used for sludge deposition, sludge collection facility, sedimentation equipment maintenance and repair. During the operation of the sedimentation basin, a barrier between the slope settler and the floor is blocked by a storage wall to prevent short circuits and a door for human access.

The sludge collection method is structurally constrained and can be used by manpower or by chain-flighted or submersible bogie devices.In case of excessive sludge deposition due to failure or other causes, the slant plate may be damaged. Management of deposits and emissions is important. The sludge discharge from the settling basin to the outside of the settling basin, i.e., to the slurry, is preferably discharged as natural oil and a pump may be used.

Korean Patent Laid-Open No. 2001-0081742 (hereinafter, referred to as Prior Art 1) introduces an inclined tube-type sedimentation device for sedimentation.

A sedimentation apparatus for sedimentation of flocs in water purification and sewage treatment plants, and a device for inclining and manufacturing a hexagonal honeycomb sedimentation tube with three Y-shaped flanges inserted in three directions.

Republic of Korea Patent Publication No. 10-0717429 (hereinafter referred to as Prior Art 2) is known as "high efficiency multi settling tank". It is characterized by dualizing the inclined plate precipitation apparatus up and down and adjusting the inclination of the inclined plate.

Republic of Korea Patent Publication No. 10-0400991 (hereinafter referred to as prior art 3) is known "removable upflow slope plate system and a rectangular gravity settler including the same". The built-in plurality of detachable inclined plates has a feature that can be separated and moved.

Republic of Korea Utility Model Publication No. 1986-0002484 (hereinafter referred to as prior art 4) is introduced "inclined plate assembly for high speed needle".

The inclined plate assembly is laterally connected to the motor and the power transmission shaft to enable structural angle adjustment and vibrating of the inclined plate.

The existing technology and the prior art have their own characteristics, but do not solve various problems occurring in the actual water treatment plant or wastewater treatment plant. In order to improve the sedimentation efficiency by shortening the flop settling distance, it is necessary to minimize the gap of the inclined plate and to reduce the diameter of the inclined tube.

In the prior art or in the prior art, the accumulated floc is caused to slide downward by gravity, so the inclination is necessary. If the gap is too narrow, sludge may accumulate at the bottom of the ramp and the sludge may reappear, and the floc will begin to slide after accumulating to some extent, thus limiting the gap between the ramp and the size of the ramp. This is the reason why the minimum spacing is about 100 mm in various design criteria.

In addition, there are many cases in which the floc is not smoothly slipped down depending on various factors such as roughness, angle of inclination, sticky property of the floc, and shape and structure of the device according to the material of the inclined plate or the inclined tube. Although there is an advantage of operating without settling down the sludge, sludge deposition space, sludge collection facility, space for maintenance of sedimentation device, and device for periodically discharging sludge out of the slant plate or inclined pipe are required. It also involves the discharge of water containing sludge.

Transport to the outlet of the sludge being deposited is by manpower or by chain-flighted or underwater bogie devices.

Prior art 1 promotes the convenience of fabrication of tubular sedimentation basin, but does not solve the problems associated with the floc removal and cleaning efficiency. Is the same as the existing technology.

In addition, although the prior art 3 is improved in terms of convenience of installation and movement of the inclined plate, the above problems exist in terms of precipitation and washing efficiency.

Prior art 4 shows an effort to identify and solve the problems of the existing technology.

The method of adjusting the inclination of the inclined plate and the floc detachment method by vibrating is more advanced than the conventional technology. However, the motor is only able to adjust the angle of the inclined plate and vibrate. Existing problems, such as having to install a collector, cannot be solved. And it is the same as the prior art 2 which made it possible to adjust the inclination angle of the inclination plate.

Therefore, it is possible to drastically shorten the settling distance of the floc without being limited by the material and spacing of the inclined plate and the size of the inclined tube, and it is possible to operate with the horizontal flow flow having the best sedimentation efficiency and to perform a complete cleaning in a short time. Inclined plates or inclined tube settling devices are required.

In order to solve the problems of the prior art as described above and to achieve the above object, a rotation center axis is connected to a motor capable of adjusting the rotation speed, and after the sedimentation plate precipitation module or the precipitation tube precipitation module is mounted on the rotation center axis, The floc in the water is removed by passing the water to be treated into the sedimentation module. The fundamental difference from the existing technology and the prior art is that the sedimentation plate or the sedimentation tube may be mounted horizontally or inclined. The horizontal and inclined plate settler, rather than the conventionally used inclined plate settler, are an accurate representation of this technology.

In order to periodically remove the flocs accumulated in the sedimentation plate or sedimentation tube, the motor is driven to rotate the sedimentation plate sedimentation module or the sedimentation tube sedimentation module. Desorption, flotation and washing off the surface. When the sedimentation plate or sedimentation tube is installed horizontally with respect to the rotational center axis, it becomes a horizontal flow and the cleaning is performed only by the rotation of the sedimentation module. Both sliding and rotating cleaning can be utilized.

In either case, because there is a powerful cleaning means called rotary washing of the precipitation module, the spacing or size of the precipitation plate or the precipitation pipe can be made very small and the precipitation efficiency can be greatly improved.

By reducing the spacing of the sedimentation plate or the diameter of the sedimentation tube, the floc removal efficiency is improved compared to the existing technology, and it is possible to select economical materials without being limited by the material of the sedimentation plate or sedimentation tube. Through horizontal installation of the flock has the effect of minimizing the settling distance. In addition, by washing through the rotation of the sedimentation module, the space required in the lower part of the existing inclined plate settling device becomes unnecessary, thereby minimizing the volume of the sedimentation basin and simultaneously eliminating the sludge collector that has to be complicatedly installed in a narrow space. There is also an advantage that can be perfect in a short time.

Detailed description of the implementation of the present invention with reference to the accompanying Figures 1 to 5 will be described in detail. In the present invention, in the treatment of colloidal microparticles, phosphorus, microorganisms, dissolved organic and inorganic substances in drinking water or sewage, sedimentation module composed of sedimentation plate and sedimentation tube for sedimentation of flocs formed by administering a flocculant As a sedimentation device using the sedimentation basin (1) equipped with the treated water inlet (2), the treated water outlet (3), the washing sludge outlet (11) and connected to the motor (4) Position the center of rotation (5) vertically or horizontally in the center of the sedimentation basin (1). The sedimentation basin 1 has a circular, rectangular, or a mixture of circular and rectangular shapes according to the shape of the sedimentation plate sedimentation module 6 or the sedimentation tube sedimentation module 8. In addition, the motor 4 and the rotating shaft 5 connected to the motor are preferably round bars or square bars made of stainless steel having sufficient strength and thickness. The motor 4 may be installed on the upper, lower or side surface of the sedimentation basin 1. The central axis of rotation 2 may be directly connected to the motor or driven through a chain.

The precipitation plate precipitation module 6 and the precipitation tube precipitation module 8 will be described in more detail. First, the settling plate settling module 6 of FIG. 1 will be described. Plastics, PVC, polyethylene, synthetic resins such as FRP, aluminum, iron, stainless steel, copper, and tempered glass are made of plates of the required shape and size such as square and round. To stack several settling plates 7 at regular intervals, an iron or stainless steel plate or an angle having a strength capable of supporting the entire load of the settling plate 7 at the bottom of the central axis of rotation is placed on the central axis of rotation 5. It is fixed by welding or the like, and the previously produced precipitation plates 7 are stacked at the required intervals. The spacer plate spacer 12 may be inserted according to the precipitate plate material. Installing a precipitation plate support structure 10 that supports the load while maintaining a gap on the outside of the precipitation plate 7 produces a precipitation plate precipitation module 6 as a structure having strength to withstand rotation.

The sedimentation plate sedimentation module 6 produced in this way is a sedimentation basin consisting of the water to be treated inlet (2), the treated water outlet (3), the washing sludge outlet (11), and the washing water injection and supply device (13) as needed. By placing it in the center of (1), the water treatment apparatus for achieving the objective of this invention is completed. The circular part of the shape of the sedimentation basin 1 of FIG. 1 is a space for securing a rotation radius required when rotating the rectangular sedimentation plate module 6.

Raw water, sewage water, etc. can be directly introduced into the sedimentation basin (1) or water passed through a rapid mixing tank and floculation basin for flocculation (1). ), The water to be treated flows in a horizontal or transverse flow dispersed over several settling plates (7), and flocs or particles having a specific gravity greater than 1 are settled by gravity, Upon contact, it is separated from running water and removed. If precipitation occurs for a certain period of time, flocs accumulate on the surface of the precipitation plate 7 to form a floc layer. The accumulated floc layer thickness is determined by the floc concentration in the water to be treated, the flow rate of the treatment, and the number of the precipitation plates 7. As the number of precipitation plates 7 increases, the gap between the precipitation plates becomes narrower, the sedimentation distance is shortened, and the accumulated floc layer thickness is distributed to each precipitation plate while the total load and manufacturing cost increase. It is clear that the floc removal rate is increased.

The following describes the cleaning of accumulated flocs. The inflow of the object water and the outflow of the treated water are stopped and the motor 4 is rotated to rotate the sedimentation plate sedimentation module 6. By the rotation of the sedimentation plate module, floc floats in the water to be treated remaining in the sedimentation plate, and the washing sludge outlet 11 is opened at the same time as the rotation or after a certain time, so that the floc is contained and the floc is floated. The high concentration of water to be treated is quickly discharged to the outside of the sedimentation basin 1 through the sludge discharge port (11). In this case, the washing efficiency may be increased by spraying the washing water onto the precipitation plate through the washing water injection and supply device 13 as necessary.

The settling tube settling module 8 of FIG. 2 will be described.

Sedimentation tube The sedimentation module 8 consists of a circular, square, pentagonal, hexagonal, etc. with various materials instead of the sedimentation plate 7 in the sedimentation plate sedimentation module 6. The inner diameter determines the settling distance of the floc. Sedimentation tube The steel or stainless steel plate or angle having strength capable of supporting the entire load of the sedimentation module 8 is fixed to the center of rotation 5 by welding or the like, and a plurality of sedimentation tubes 9 settle the sedimentation tube. A sedimentation pipe support structure (10) is installed so as to constitute the module (8) and the sedimentation pipe (9) is placed inside the structure. Observation of the sedimentation tube for rotation of the sedimentation tube 8 for cleaning the sedimentation tube 8 is obvious. The washing method is the same as that of the precipitation plate precipitation module 6 of FIG. In the sedimentation tubes of the prior art and the prior art, since the washing is performed through the floc slip phenomenon due to gravity, it is not possible to use inexpensive general tubes, which are mass-produced as in the present invention, in a bundle form and in a special form such as a honeycomb. There is a fundamental difference that must be made and used.

Therefore, in the present invention, a plurality of pipes are formed in a bundle, and the space between the settling pipe and the settling pipe is left open so that the treated water can flow outside the pipe so that the floc can settle in the space between the settling pipe and the settling pipe. By having a structural feature to make the manufacturing cost is greatly reduced.

3 is a sedimentation basin composed of a horizontal circular sedimentation tube sedimentation module 8 of a horizontal axis of rotation 5. The configuration and operation is the same as in the case of Figure 2, but the lower part of the sedimentation basin (1) has a shape that ensures the space required for rotation during the washing of the sedimentation tube sedimentation module (8).

4 is a sedimentation basin consisting of a vertical rotation center axis 5 and a horizontal circular sedimentation plate sedimentation module 8. Configuration and operation are the same as in the case of FIG.

Figure 5 is a sedimentation basin consisting of a vertical axis of rotation (5) and the inclined square settling plate sedimentation module (8). The configuration is the same as in the case of FIG. 1 except that the precipitation plate 7 is installed inclined, and the operation is carried out by the gravity of the flocs accumulated on the precipitation plate 8 as in the inclined plate sedimentation basin of the prior art. Continuously removed to the bottom of (1). Only when the floc does not slip smoothly or when it is necessary to discharge the sludge deposited in the lower part of the sedimentation basin, the sedimentation sludge is floated by rotating the sedimentation module 6 by rotating the sedimentation module 6 and the sedimentation basin through the washing sludge outlet 11. Discharge to the outside.

In FIGS. 1 to 4, when appropriate holes are drilled in the settling plate 7 and the settling tube 9, the floc detached at the time of washing is additionally discharged quickly through this hole, thereby shortening the washing time.

Example 1 Turbidity Removal Experiment by Horizontal Sedimentation Plate Precipitation Module

W60cm × L200cm × T3mm, PVC sedimentation plates were stacked in 6 steps of sedimentation plate spacing 4cm, horizontal sedimentation plate sedimentation module was prepared and placed in sedimentation basin of 30cm depth.

Using coagulant and pH adjuster Ca (OH) ₂ in a mixed paper at a flow rate of 40 l / min (pH 7), using raw water prepared with Kaolin to have a concentration of 100 NTU to 200 NTU (pH 7). The flocs were formed for 20 minutes (typically 20-40 minutes) and then flowed into the horizontal settling plate sedimentation module. It is shown in [Table 1].

 As can be seen in Table 1, an average of 77.9% of flocs during the 5-minute flop formation time, which is significantly shorter than the existing technology (20-40 minutes) and 9 minute settling time, which is significantly shorter than the existing slope plate settling basin (20-40 minutes). Removal rate was achieved.

time
(hr) flux
(L / min) Sedimentation Plate Sedimentation Module
(W500mm × L600mm × T3mm) Inflow Trust
(NTU) Runoff Confidence
(NTU) Removal rate
(%) One 40 105.7 29.6 72.0 2 40 112.4 27.9 75.2 3 40 189.0 49.94 73.6 4 40 204.4 48.1 76.4 5 40 194.5 39.5 79.7 6 40 187.3 35.6 81.0 7 40 204.5 37.2 81.8 8 40 198.5 31.8 83.9

Example 2 Turbidity Removal Experiment by Horizontal Sedimentation Tube Sedimentation Module

A horizontal sedimentation tube sedimentation module was made of 14 PVC tubes of 10cm in diameter and 2m in length and placed in a sedimentation basin with a depth of 30cm, and the raw water prepared with kaolin was treated as 40ℓ / min Inject the flocculant and the pH adjuster Ca (OH) ₂ in the mixing paper at a flow rate (pH 7), form flocs for 5 minutes (20-40 minutes) in the floc forming paper, and then flow into the horizontal settling precipitation module. The experiment was carried out to precipitate out flocs for a residence time of minutes and the results are shown in [Table 2].

As can be seen from Table 2, the average floc removal rate was 70.0% during the 5 minute flotation time which was significantly shorter than the existing technique (20-40 minutes) and the 9 minute settling time which was significantly shorter than the conventional inclined tube sedimentation basin.

time
(hr) flux
(L / min) PVC tubular sedimentation module
(D10cm × L2m, 14 EA) Inflow Trust
(NTU) Runoff Confidence
(NTU) Removal rate
(%) One 40 106.3 55.7 47.6 2 40 103.0 45.9 55.4 3 40 189.6 52.5 72.3 4 40 207.9 47.2 77.3 5 40 210.0 48.6 76.9 6 40 217.4 50.1 76.9 7 40 216.7 49.0 77.4 8 40 187.6 45.1 75.9

<Example 3> Rotation washing experiment of floc sludge accumulated in the horizontal precipitation plate precipitation module

The floc sludge accumulated about 0.5cm on 40cm × 40cm size, thickness 3mm, PVC sedimentation plate mounted on the motor and rotation center shaft was rotated at 30rpm to completely float and wash within 5 seconds. Could.

The present invention can be applied to improve or establish a cross-flow sedimentation basin or inclined plate sedimentation basin adopted in conventional water and sewage treatment and various industrial wastewater treatment processes, and has the effect of minimizing the sedimentation basin volume with shortening the sedimentation time. It is a technology that can solve all the problems caused by the floc downward slip obstacle occurring in the slant plate settler.

Figure 1 is an example of a sedimentation basin consisting of a sedimentation plate sedimentation module of the motor of the present invention and a vertical axis of rotation and a horizontal square connected to the motor.

Figure 2 is an example of a sedimentation basin consisting of a sedimentation tube sedimentation module of the motor of the present invention and the vertical axis of rotation and horizontal circular connected to the motor.

Figure 3 is an example of a sedimentation basin consisting of a sedimentation tube sedimentation module of a horizontal circular center and a horizontal circular axis connected to the motor of the present invention.

Figure 4 is an example of a sedimentation basin consisting of a sedimentation plate sedimentation module of the motor of the present invention and a vertical center of rotation and a horizontal circle connected to the motor.

Figure 5 is an example of a sedimentation basin consisting of a sedimentation plate sedimentation module of the motor of the present invention and a vertical axis of rotation connected to the motor and the inclined square.

Description of the main parts of the drawing

 1: sedimentation basin 2: water to be treated

 3: treated water outlet 4: motor

 5: center of rotation 6: sedimentation plate sedimentation module

 7: settling plate 8: settling tube settling module

 9: settling pipe 10: settling plate or settling support structure

11: washing sludge outlet 12: sedimentation plate spacer (Spacer)

13: washing water injection and supply device

Claims (9)

A motor capable of adjusting the rotation speed in the sedimentation basin, a rotary center axis connected directly or via a chain to this motor, and a sedimentation plate sedimentation module or sedimentation tube sedimentation module mounted on this rotational axis are located inside the sedimentation module. The floc in the water is settled by passing the water, and the entire settling module is rotated so that the accumulated floc inside the settling module is detached, suspended, and washed by the centrifugal force and vortex caused by the rotation. The central axis of rotation in which the pipe settling module is mounted is formed vertically or horizontally on the settling basin, and the settling plate settling module selects the spacing between the settling plates, and in the settling settling module, selects the inner size of the settling pipe to settle the floc. A water treatment device, characterized in that configured to be determined. delete delete delete The method of claim 1, The sedimentation plate sedimentation module is composed of a circular, or square, pentagonal, hexagonal, etc. sedimentation plate is mounted on the center of rotation, and the sedimentation tube sedimentation module is composed of circular or square, pentagonal, hexagonal, sedimentation tube A water treatment device configured to be mounted on a shaft. delete The method of claim 1, The sedimentation tube sedimentation module is composed of a plurality of tubes in a bundle form, and leaves the space between the sedimentation tube and the sedimentation tube open so that the water to be treated can flow outside the sedimentation tube, so that the space of the floc in the space between the sedimentation tube and the sedimentation tube A water treatment device configured to cause precipitation. The method of claim 1, In rotating the module to detach, float, and wash the flocs accumulated in the sedimentation plate sedimentation module and the sedimentation tube sedimentation module, it is configured to increase the washing efficiency by spraying the washing water by using the washing water injection and supply device. Having a water treatment device. The method of claim 1, The sedimentation plate sedimentation module and the sedimentation pipe, each of the sedimentation plate and sedimentation pipe constituting the sedimentation tube having a predetermined size to facilitate the discharge of the detached floc during washing.

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