Algae removal system in a circular sedimentation tank

Abstract

To provide an algae removing device which can remove adhered algae which are generated on an overflow notch of a sedimentation basin, or on a building frame such as a trough to which treatment water flows, and can remove algae adhered to an irregularity on a surface of a side wall or a bottom wall of a trough of the circular sedimentation basin.SOLUTION: There is provided an algae removing device comprising: a support pole for an algae removing brush which is fitted to a center scraper being provided on a circular sedimentation basin; an arm 31 for an algae removing brush which is connected to the support pole for an algae removing brush; a guide rod support member 33 coupled to the arm 31 for an algae removing brush; a guide rod 34 connected to the guide rod support member 33; and an algae removing brush for a center bottom, an algae removing brush 39 for a side part bottom, an algae removing brush 51 for an overflow side trough side wall inclined plane, an algae removing brush 52 for an overflow side trough side wall to face, and an algae removing brush 61 for a side, which are connected to a base 36 for an algae removing brush which is connected to the guide rod 34 through the support plate 35.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a cleaning device for effectively removing algae and the like adhering to troughs and the like of a circular sedimentation tank used in a water and sewage treatment plant.

Background Art

[0002] In a circular sedimentation tank used in a water and sewage treatment plant, particularly in the final sedimentation tank in the latter stage of the treatment process where the water is purified, the dissolved oxygen in the treated water increases. In this state, when light and appropriate nutrients act, a large amount of algae adhere to the overflow notch of the treated water in the sedimentation tank and the trough through which the treated water flows out through the notch and grow. The generated algae contaminates the stored water in the sedimentation tank, and a putrid odor is generated due to the decay of a large amount of generated algae. To remove the generated algae, brushing by hand or cleaning with a high-pressure jet is performed, but workers are required. In summer, the growth of algae is rapid and an increase in the number of workers is necessary. Also, there is a method of applying an anti-algae paint to suppress the adhesion of algae, but it requires a lot of work such as removing the algae with a deck brush or the like before applying the paint, then killing the algae, further performing water washing and drying, and scouring with a wire brush or the like. Moreover, since the effectiveness lasts for about one and a half years, repainting is necessary.

[0003] Also, the places where the generated algae adhere are particularly the overflow notch of an outdoor circular sedimentation tank and the trough through which the treated water of the sedimentation tank flows out through the overflow notch. And there are various algae removal devices for each place where the algae adhere. For example, there is a removal device (Patent Document 1) in which a brush is attached (via a brush mounting plate) to the lower end of a brush support stay that extends downward into the overflow weir, and a handle provided on the upper part of the brush support stay is rotated to remove algae from inside the overflow weir, and there is a brushing device for a septic tank partition wall (Patent Document 2) which is attached to a septic tank partition wall with a T-shaped cross section and troughs attached in the longitudinal direction of the legs, and consists of a frame that can be moved longitudinally along the upper surface of the partition wall, a guide rod fixed perpendicularly to the side of the frame, a slider that can move up and down along the guide rod, a slider lifting device attached to the frame and consisting of a motor, a crankshaft and a connecting rod, a trough-shaped holder whose back is fixed to the slider, an arm that has a brush at its lower end that is pivotally attached to the holder in the center and can contact the required surface of the partition wall, an adjustment bolt that can screw through the upper end of the arm and press the bottom surface of the holder, and a guide wheel device attached to the frame opposite the arm and capable of gripping the partition wall together. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Publication No. 3-12321 [Patent Document 2] Japanese Patent Application Publication No. 3-143510 [Overview of the project] [Problems that the invention aims to solve]

[0005] The aforementioned prior art methods all differ in the location where the algae are attached and the structure of the brushing process. Because circular sedimentation tanks are constructed using concrete from civil engineering works, the surface of the structure, which is the trough through which the treated water from the sedimentation tank flows out via the overflow notch, can have irregularities ranging from a few millimeters to sometimes several tens of millimeters. As a result, brushes cannot follow the irregularities of the circular sedimentation tank structure, leaving algae behind. Furthermore, as the surface deteriorates over time, the size and depth of the unevenness increase, preventing the brush from reaching the inside of the unevenness, resulting in some algae being left behind.

[0006] This invention has been made in view of the above problems, and the generated algae attach to... ru yen The objective is to provide an algae removal device that uses brushes to remove algae from structures such as the overflow notch of a sedimentation tank and the trough through which treated water flows. Furthermore, the purpose is to remove algae that have adhered to the uneven surfaces of the circular sedimentation tank, which is manufactured using concrete. [Means for solving the problem]

[0007] The inventors of the present invention have solved the above problems by the following means. [1] A circular sedimentation tank 1 is composed of a structure including an annular bottom wall 2b, an annular side wall 2a erected thereon, and an overflow side trough side wall 2c. A center scraper 20 is rotatably mounted in the circular sedimentation tank 1, and a support pole for an algae removal brush is erected on the center scraper 20. 30 The algae removal brush arm 31 is attached to the algae removal brush support pole 30, a guide rod support member 33 is attached to the algae removal brush arm 31 so as to be position-adjustable by the adjustment plate 32 and the fixing device 40, and a guide rod 34 is attached to the guide rod support member 33. A support plate 35 connected to the guide rod 34, a base 36 for the algae removal brush connected to the support plate 35, and the base for the algae removal brush 36 Algae removal brush 37 for the central bottom and algae removal brush for the side bottom are attached to the bottom. 39 and from the law of nature, The circular sedimentation tank 1 comprises a water storage tank 4 for storing water, a side wall 2a forming the outer circumference of the circular sedimentation tank 1, and an overflow side trough side wall 2c provided radially inward from the side wall 2a of the circular sedimentation tank 1. A portion of the water stored in the water storage tank 4 flows out to the outside by overflowing the overflow side trough side wall 2c. The center scraper 20 is a device that rotates around the center of the circular sedimentation tank 1 along the radial direction of the circular sedimentation tank 1, and scrapes up the sediment that has settled in the water tank 4. The aforementioned central bottom algae-removing brush 37 removes algae from the annular bottom wall 2b as the center scraper 20 rotates. The side bottom algae-removing brush 39 removes algae from the areas to the sides of the area where algae removal is performed by the central bottom algae-removing brush 37, as the center scraper 20 rotates. A circular sedimentation tank algae removal device characterized by the following. [2] The algae removal device in a circular sedimentation tank according to [1], characterized in that the algae removal brush base 36 is suspended from the guide rod support member 33 by a wire 41. [3] The algae removal device in a circular sedimentation tank according to [1] or [2], characterized in that a support plate 35 is attached to the algae removal brush base 36 via rotating pins 35a and 35b. [4] The algae removal device in a circular sedimentation tank according to any one of [1] to [3], characterized in that the guide rod 34 is rotatable in the horizontal direction. [5] The algae removal device for a circular sedimentation tank according to any one of [1] to [4], characterized in that the algae removal brush 39 for the side bottom is configured in a triangular shape. [6] The overflow side trough algae removal brush base 50 is attached to the algae removal brush base 36 by a mounting plate 53 and a support shaft 54, and the overflow side trough side wall slope brush 51 and the overflow side trough side wall upper surface algae removal brush 52 are attached to the overflow side trough algae removal brush base 50. the law of nature, The algae-removing brush 51 for the overflow side trough side wall slope removes algae from the slope provided on the overflow side trough side wall 2c as the center scraper 20 rotates. The algae-removing brush 52 for the upper surface of the overflow trough side wall removes algae from the upper surface of the overflow trough side wall 2c as the center scraper 20 rotates. Algae removal device in a circular sedimentation tank according to any one of [1] to [5], characterized by the following: [7] A bracket 60 for a side algae brush is attached to the base 36 for the algae brush by a mounting plate 62 with an elongated hole and a fixing device 63, and is attached to the side algae brush bracket 60. As the center scraper 20 rotates, algae are removed from at least one of the side wall 2a or the overflow side trough side wall surface 2f of the overflow side trough side wall 2c. Algae removal brush for the side 61 Algae removal device for a circular sedimentation tank according to any one of [1] to [6], characterized by comprising the above. [8] An overflow notch 3 is provided on the upper side of the overflow trough side wall 2c through which water from the water storage tank 4 overflows. The overflow notch algae brush base 70 is attached to the aforementioned algae brush arm 31, the overflow notch algae brush bracket 71 is attached to the overflow notch algae brush base 70 by an elongated hole and a fixing device 73, and the overflow notch algae brush bracket 71 is attached to the overflow notch algae brush bracket 71 As the center scraper 20 rotates, the overflow notch 3 is cleared of algae. Algae removal device for a circular sedimentation tank according to any one of [1] to [7], characterized by comprising an overflow notch algae removal brush 72.

[0008] According to the present invention with the above configuration, it is possible to provide an algae removal device that can remove algae with a brush from structures such as the overflow notch of a circular sedimentation tank where the generated algae attach, and the trough through which treated water flows. Furthermore, it can prevent algae from being left behind on uneven surfaces such as the troughs of circular sedimentation tanks. [Brief explanation of the drawing]

[0009] [Figure 1] It is a plan view of an algae removal device in the circular sedimentation tank of the present invention. [Figure 2] It is an enlarged view taken along line A-A of FIG. 1. [Figure 3] It is a side view of FIG. 2. [Figure 4] It is an enlarged view of the region indicated by the arrow line X in FIG. 3. [Figure 5] It is an enlarged view of the region indicated by the arrow line X in FIG. 3. [Figure 6] It is a structural view of the algae removal device in the circular sedimentation tank of the present invention. [Figure 7] It is a structural view of the algae removal device in the circular sedimentation tank of the present invention. [Figure 8] It is a diagram showing the usage method of the algae removal device in the circular sedimentation tank of the present invention. [ [Figure 9] It is a diagram showing the usage method of the algae removal device in the circular sedimentation tank of the present invention.

Mode for Carrying Out the Invention

[0010] The mode for carrying out the present invention will be described based on the drawings of the examples. FIG. 1 is a plan view of an example of the algae removal device in the circular sedimentation tank of the present invention, FIG. 2 is an enlarged view taken along line A-A' of FIG. 1, FIG. 3 is a side view of FIG. 2, FIGS. 4 and 5 are enlarged views of the region indicated by the arrow line X in FIG. 3, and the description of the bracket 60 for the side algae removal brush, the side algae removal brush 61, the adjustment plate 62, etc. described in FIG. 5 to be described later is omitted in FIG. 4. Similarly to FIG. 4, FIG. 5 also omits the description of the central bottom algae removal brush 37, the bracket 38 for the side bottom algae removal brush, the side bottom algae removal brush 39, the algae removal brush 51 for the inclined surface of the overflow side trough side wall, the algae removal brush 52 for the upper surface of the overflow side trough side wall, the overflow side trough algae removal brush base 50 for attaching the algae removal brush 51 for the inclined surface of the overflow side trough side wall and the algae removal brush 52 for the upper surface of the overflow side trough side wall, etc. described in FIG. 4 to be described later. Figures 6 and 7 are structural diagrams of the algae removal device in the circular sedimentation tank of the present invention. Figure 6 is a view from the direction of arrow A in Figure 1, and Figure 7 is a view from the direction of arrow B in Figure 1. Figures 8 and 9 illustrate the method of using the algae removal device in the circular sedimentation tank of the present invention.

[0011] In Figures 1 to 9, 1 is a circular sedimentation tank, 2 is a trough, 3 is an overflow notch (wear plate), and 4 is a water storage tank (or septic tank). The trough from which the treated water from the circular sedimentation tank 1 flows out consists of an annular bottom wall 2b and an annular side wall 2a and an overflow side trough wall 2c erected thereon. The upper edge of the overflow trough side wall 2c is provided with a sawtooth-shaped overflow notch 3, which allows clean water from the upper layer to slowly and evenly overflow from the entire reservoir to the outside, preventing sludge and other sediment from being stirred up from the bottom of the reservoir 4. 10 is a passage located above the circular sedimentation tank 1, 20 is a center scraper (sludge scraper), 21 is a drive unit, and 22 is a center cage. The passage 10 provided in the circular sedimentation tank 1 is used for water quality testing in the water storage tank 4, as well as for inspection and repair of the center scraper 20 and drive unit 21. 30 is a support pole for the algae removal brush, 31 is an arm for the algae removal brush, 32 is an adjustment plate, 33 is a guide rod support member, 34 is a guide rod, 35 is a support plate, 36 is a base for the algae removal brush, 37 is an algae removal brush for the central bottom, 38 is a bracket for the algae removal brush for the side bottom, and 39 is an algae removal brush for the side bottom.

[0012] Since the side bottom algae removal brush 39 is configured in a triangular shape, it can remove algae from the corners of the bottom wall 2b of the trough 2 of the circular sedimentation tank 1. The guide rod support member 33 is attached to the algae removal brush arm 31 so that its position in the trough width direction can be adjusted using fasteners 40 such as bolts, nuts, and washers on an adjustment plate 32 provided with an elongated hole. The fasteners described below will also be described as examples using nuts and washers. A guide rod 34 is attached to the guide rod support member 33, and a support plate 35 is attached to the guide rod 34 via pivoting pins 35a and 35b. A base 36 for the algae removal brush is attached to the support plate 35. With this configuration, the left-right position of the algae removal brush base 36 can be adjusted by adjusting the position of the guide rod support member 33 in the trough width direction, thereby allowing the left-right position of the central bottom algae removal brush 37 and the side bottom algae removal brushes 39 to be adjusted.

[0013] Furthermore, the algae-removing brush base 36 is suspended from the guide rod support member 33 by a wire 41. When the algae-removing brush base 36 moves up and down according to the unevenness of the bottom surface of the bottom wall 2b, the length of the wire 41 is adjusted to maintain a certain level of brushing force for the brushes (37, 39, etc.) on the algae-removing brush base 36, allowing the brushes to move without bending. If the brushes bend too much, the tips of the brushes will not catch properly on the brushing surface, and the brushing force will weaken. Therefore, the tips of the brushes are positioned upright on the brushing surface to maintain the brushing force.

[0014] Furthermore, a support plate 35 is attached to the algae removal brush base 36 via pivot pins 35a and 35b. When the algae removal brush base 36 moves up and down in accordance with the unevenness of the bottom surface of the bottom wall 2b, the pivot pins 35a and 35b rotate in the direction shown in Figure 8. The central bottom algae removal brush 37 and the side bottom algae removal brush 39 attached to the algae removal brush base 36, along with the weight of other parts attached to the algae removal brush base 36, press the central bottom algae removal brush 37 and the side bottom algae removal brush 39 along the unevenness of the bottom surface of the bottom wall 2b, thereby enabling thorough cleaning of the uneven bottom surface of the bottom wall 2b.

[0015] Reference numeral 50 denotes a base for the overflow-side trough algae removal brush, to which the overflow-side trough side wall slope brush 51 and the overflow-side trough side wall upper surface algae removal brush 52 are attached. It is attached to the algae removal brush base 36 by a mounting plate 53 and a support shaft 54. As described above, the base 50 for the overflow trough algae removal brush is connected to the base 36 for the algae removal brush via the mounting plate 53, so that the algae removal brush 51 for the slope of the overflow trough side wall and the algae removal brush 52 for the upper surface of the overflow trough side wall can move left and right in accordance with the left and right movement of the base 36 for the algae removal brush. Furthermore, the base 50 for the overflow side trough algae removal brush is suspended by a guide rod support member 33 and a wire 55. When the base 50 for the overflow side trough algae removal brush moves up and down in accordance with the irregularities of the upper surface 2d and the slope 2e of the overflow side trough side wall, the length of the wire 55 can be adjusted to maintain a certain level of brushing force for the brushes (51, 52) provided on the base 50 for the overflow side trough algae removal brush, allowing the brushes to move without bending.

[0016] 60 is the bracket for the side algae removal brush, 61 is the side algae removal brush, 62 is the adjustment plate, and 63 is the fixing device. The bracket 60 for the side algae brush is attached to the base 36 for the algae brush so that its position can be adjusted by fasteners 63 on an adjustment plate 62 with an elongated hole, thereby allowing the position of the side algae brush 61 to be adjusted in the left-right direction. Furthermore, the bracket 60 for the side algae-removing brush is attached to the base 36 for the algae-removing brush, which is suspended by a wire 41 from the guide rod support member 33. The side algae-removing brush 61 can move vertically in accordance with the vertical movement of the base 36 due to the unevenness of the bottom surface of the bottom wall 2b.

[0017] Furthermore, the guide rod 34, which is connected to the algae removal brush base 36 via a support plate 35, is rotatable horizontally as shown in Figure 9. As the algae removal brush base 36 attempts to move left or right in the trough width direction in accordance with the irregularities of the surface of the annular side wall 2a and the side wall surface 2f of the overflow side trough, the guide rod 34 rotates. Therefore, the side algae removal brush 61, the side bottom algae removal brush 39, and the overflow side trough side wall slope algae removal brush 51 provided on the algae removal brush base 36 move in the trough width direction in accordance with the irregularities of the surface of the annular side wall 2a, the side wall surface 2f of the overflow side trough, and the side wall slope 2e of the overflow side trough. This allows for thorough cleaning of the irregular surfaces of the annular side wall 2a, the side wall surface 2f of the overflow side trough, and the side wall slope 2e of the overflow side trough. Furthermore, the rotation mechanism in the rotating pins 35a and 35b and the guide rod 34 described in

[0016] above may be modified by replacing the support plate 35 that pulls the algae removal brush base 36 and the rotating pins 35a and 35b with ropes or the like.

[0018] 70 is the base for the overflow notch algae removal brush connected to the algae removal brush arm 31, 71 is the bracket for the overflow notch algae removal brush, 72 is the overflow notch algae removal brush, and 73 is the fixing device. The bracket 71 for the overflow notch algae removal brush is provided with an elongated hole and is movably attached to the base 70 for the overflow notch algae removal brush by a fixing device 73 so that its position can be adjusted. This allows for vertical position adjustment of the overflow notch algae removal brush 72.

[0019] Figures 8 and 9 illustrate the method of using the algae removal device in the circular sedimentation tank of the present invention. Figure 8 is a side view, and Figure 9 is a plan view of Figure 8. As shown in Figure 8, when the center scraper 20 is rotated by the drive device 21, the algae removal brush arm 31, which is connected to the algae removal brush support pole 30 connected to the center scraper 20, rotates. As the algae-removing brush arm 31 rotates, the guide rod support member 33, which is movably attached to the algae-removing brush arm 31 by an adjustment plate 32 and a fixing device 40, rotates in the same direction as the rotation of the algae-removing brush arm 31. When the guide rod support member 33 rotates, the guide rod 34 to which the guide rod support member 33 is connected, and the algae removal brush base 36, which is connected to the guide rod 34 via the support plate 35, rotate in the same direction.

[0020] As the algae removal brush base 36 rotates, the central bottom algae removal brush 37, the side bottom algae removal brush 39, the overflow side trough side wall slope algae removal brush 51, the overflow side trough side wall upper surface algae removal brush 52, and the side algae removal brush 61, all connected via the algae removal brush base 36, rotate in the same direction. This makes it possible to remove algae attached to the annular side wall 2a, the annular bottom wall 2b, the upper surface 2d of the overflow side trough side wall, the slope 2e of the overflow side trough side wall, and the surface 2f of the overflow side trough side wall of the circular sedimentation tank. Similarly, when the algae-removing brush arm 31 rotates, the overflow notch algae-removing brush bracket 71, which is attached to the overflow notch algae-removing brush base 70 connected to the algae-removing brush arm 31, rotates in the same direction, causing the overflow notch algae-removing brush 72, which is attached to the overflow notch algae-removing brush bracket 71, to rotate in the same direction. This makes it possible to remove algae attached to the structure, such as the overflow notch 3 of the circular sedimentation tank and the trough 2 through which treated water flows. [Explanation of Symbols]

[0021] 1: Circular sedimentation tank 2: Trough 2a: Annular side wall 2b: Ring-shaped base wall 2c: Overflow side trough sidewall 2d: Upper surface of the side wall of the overflow trough 2e: Overflow side trough side wall slope 2f: Overflow side trough side wall 3: Overflow Notch 4. Water storage tank (or septic tank) 10: Passageway 20: Center scraper (sludge scraping machine) 21: Drive unit 22: Center Cage 30: Support pole for algae removal brush 31: Arm for algae removal brush 32: Adjustment plate 33: Guide rod support member 34: Guide rod 35: Support plate 36: Base for algae removal brush 37: Algae removal brush for the central bottom 38: Bracket for algae removal brush on the side bottom 39: Algae removal brush for side bottom 40: Fixtures 41: Wire 50: Base for overflow trough algae removal brush 51: Algae removal brush for overflow trough sidewall slopes 52: Algae removal brush for the upper surface of the side wall of the overflow trough 53: Mounting plate 54: Support shaft 55: Wire 60; Bracket for side algae removal brush 61: Side algae removal brush 62: Adjustment plate 63: Fixtures 70: Base for overflow notch algae removal brush 71: Bracket for overflow notch algae removal brush 72: Overflow Notch Algae Removal Brush 73: Fixtures

Claims

1. A circular sedimentation tank (1) is composed of a structure including an annular bottom wall (2b), an annular side wall (2a) erected thereon, and an overflow side trough side wall (2c). A center scraper (20) is rotatably mounted in the circular sedimentation tank (1), a support pole (30) for an algae removal brush erected on the center scraper (20), an arm (31) for an algae removal brush attached to the support pole (30), a guide rod support member (33) whose position can be adjusted by the arm (31), an adjustment plate (32), and a fixing device (40), and a guide rod (34) attached to the guide rod support member (33), A support plate (35) connected to the guide rod (34), a base (36) for the algae removal brush connected to the support plate (35), and a central bottom algae removal brush (37) and a side bottom algae removal brush (39) attached to the algae removal brush base (36) It consists of, The circular sedimentation tank (1) comprises a water storage tank (4), a side wall (2a) forming the outer circumference of the circular sedimentation tank (1), and an overflow side trough side wall (2c) provided inward of the side wall (2a) in the radial direction of the circular sedimentation tank (1). A portion of the water stored in the water storage tank (4) overflows the overflow side trough side wall (2c) and flows out to the outside. The center scraper (20) is a device that rotates around the center of the circular sedimentation tank (1) along the radial direction of the circular sedimentation tank (1) and scrapes up the sediment that has settled in the water tank (4). The aforementioned central bottom algae-removing brush (37) removes algae from the annular bottom wall (2b) as the center scraper (20) rotates. The side bottom algae-removing brush (39) removes algae from the area to the side of the area where algae removal is performed by the central bottom algae-removing brush (37) as the center scraper (20) rotates. Algae removal device for circular sedimentation tanks, characterized by the following.

2. The algae removal device in a circular sedimentation tank according to claim 1, characterized in that a base (36) for an algae removal brush is suspended from the guide rod support member (33) by a wire (41).

3. The algae removal device for a circular sedimentation tank according to claim 1 or 2, characterized in that a support plate (35) is attached to the algae removal brush base (36) via rotating pins (35a) and (35b).

4. The algae removal device for a circular sedimentation tank according to any one of claims 1 to 3, characterized in that the guide rod (34) is rotatable in the horizontal direction.

5. Algae removal device for a circular sedimentation tank according to any one of claims 1 to 4, characterized in that the side bottom algae removal brush (39) is configured in a triangular shape.

6. The overflow side trough algae removal brush base (50) is attached to the aforementioned algae removal brush base (36) by a mounting plate (53) and a support shaft (54), and the overflow side trough algae removal brush base (50) is attached to the overflow side trough algae removal brush base (51) for the slope of the side wall of the overflow side trough and the overflow side trough algae removal brush (52) for the upper surface of the side wall of the overflow side trough. The algae-removing brush (51) for the overflow side trough side wall slope removes algae from the slope provided on the overflow side trough side wall (2c) as the center scraper (20) rotates. The algae-removing brush (52) for the upper surface of the overflow trough side wall removes algae from the upper surface of the overflow trough side wall (2c) as the center scraper (20) rotates. Algae removal device for a circular sedimentation tank according to any one of claims 1 to 5, characterized by the above.

7. Algae removal device for a circular sedimentation tank according to any one of 1 to 6, characterized by comprising: a bracket (60) for a side algae removal brush attached to the base (36) for the algae removal brush by means of a mounting plate (62) with an elongated hole and a fixing device (63); and a side algae removal brush (61) attached to the bracket (60) for the side algae removal brush, which removes algae from at least one of the side wall (2a) or the overflow side trough side wall surface (2f) of the overflow side trough side wall (2c) as the center scraper (20) rotates.

8. An overflow notch (3) is provided on the upper side of the overflow trough side wall (2c) through which water from the water storage tank (4) overflows. The system comprises an overflow notch algae removal brush base (70) attached to the algae removal brush arm (31), an overflow notch algae removal brush bracket (71) attached to the overflow notch algae removal brush base (70) by an elongated hole and a fixing device (73), and an overflow notch algae removal brush (72) attached to the overflow notch algae removal brush bracket (71) that removes algae from the overflow notch (3) as the center scraper (20) rotates. Algae removal device for a circular sedimentation tank according to any one of claims 1 to 7, characterized by the above.

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