TW201325693A - Screen apparatus for wastewater treatment and wastewater treatment method - Google Patents

Abstract

A screen device in a waste water treatment tank is provided, in which a flow carrier exhaust portion and a drive mechanism are attached to a major body. The major body comprises a water inlet portion for the intake of the water to be treated into the water treatment tank and a water drainage portion for draining the treated water to the outside of the treatment tank. The water inlet portion has a cylindrical type rotatable screen portion with bottom portion which is provided with a filtering portion on the peripheral surface thereof. The flow carrier exhaust portion is arranged in such a manner as to approach or to abut the rotatable peripheral surface of the screen portion. The drive mechanism drives to rotate the screen portion. In this manner, in the waste water process of using flow carrier with microorganism being fixed, mesh-blocking of the filtering portion which prevents the flowing out of the flow carrier from the treatment tank can be avoided.

Description

Screening device for wastewater treatment and wastewater treatment method

The present invention relates to a screening apparatus which is assembled in a wastewater treatment apparatus (wastewater treatment tank) using a flow carrier for immobilizing microorganisms. Further, the present invention is a wastewater treatment method using the screening device.

A wastewater treatment apparatus using a flow carrier for immobilizing microorganisms is a device for treating waste water by using a microorganism immobilized on a flow carrier in a treatment tank to form a floating carrier together with waste water (water to be treated). Since the microbial treatment ability of the flow carrier in the floating state is lowered from the treatment tank, a sieve portion (filter portion) for preventing the flow carrier from flowing out is provided at the treatment water discharge from the treatment tank in which the granular flow carrier floats.

Next, in the treatment tank, a structure in which the mesh is blocked by the flow carrier does not occur in the sieve portion (filter portion). For example, Patent Documents 1 and 2 disclose means for generating a water flow (side flow) in the treatment tank immediately following the fixed sieve portion. Patent Document 3 discloses a means for providing a high-pressure water injection mechanism in a semi-submerged horizontal axis rotating drum screen.

Patent Document 4 discloses a wastewater treatment apparatus in which microbial adhesion carrier particles are suspended in a tank, and the microorganism adhering carrier particles are circulated by gas agitation to aerobically treat the drainage. Patent Document 4 discloses that a microorganism, an anthracite, an activated carbon, a zeolite, a plastic ball, an artificial aggregate, or the like is used as a microbial attachment carrier. Further, it is described that the screen portion of the drainage treatment device is composed of a wedge-shaped metal wire. Moreover, the mesh size of the wedge-shaped metal wire is set to be smaller than the particle diameter of the carrier, and it is also described that it is useful for external fixation. A cleaning brush that prevents the mesh from becoming clogged.

Patent Document 5 describes a carrier-added biological treatment apparatus comprising: a reaction tank filled with a microbial carrier; and a cylindrical carrier separation means provided with a drainage means for discharging the treated water to the outside of the reaction tank; The means rotates on the periphery of the carrier separation means; the stirring means stirs the liquid of the reaction tank and the microbial carrier. Further, the carrier separation means is specifically a cylindrical bottomed carrier separation cylinder which is formed of a wedge-shaped metal wire having a smaller gap than the particle diameter of the carrier or a meshed portion of a metal. Further, it is described that the carrier removing means is an inverted U-shaped carrier separating wing that rotates around the periphery of the carrier separating means.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-86176

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2005-254116

[Patent Document 3] Japanese Patent Publication No. 8-215693

[Patent Document 4] Announcement No. 61-22599 of Japan

[Patent Document 5] Japanese Patent Publication No. 11-267678

In Patent Documents 1 and 2, the mesh clogging eliminating means for generating a side flow with respect to the fixed screen portion (fixed filter portion) is capable even when the flow carrier is washed away by the discharge flow and hooked to the water passing portion of the screen portion. A means of flowing the flow carrier by lateral flow. However, when the flow carrier is hooked, the water passing area is reduced, so that the outflow amount of the other water passing portions is increased, and the flow carrier is changed to be easily blocked by the mesh. Thus, in the case of fixing the sieve In other words, even if a side flow of the screen portion is generated, it is impossible to say that the cell clogging can be completely prevented when there is a discharge flow at the water passing portion.

As described in Patent Document 3, in the case where high-pressure injection is performed in the rotating rolling screen portion, a driving pump for spraying water is also required when driving the screen portion. Further, the high-pressure jet water is returned to the treatment tank together with the flow carrier blocked in the sieve portion, thereby increasing the water (waste water) to be treated.

The carrier used in Patent Document 4 is a non-elastic hard carrier such as sand, anthracite, activated carbon, zeolite, plastic ball, artificial aggregate, etc., and is hard to be deformed by external force. Therefore, the carrier does not easily occur in the case where the mesh is blocked by a sieve portion having a smaller particle diameter than the carrier. Further, although the screen surface is often washed, when the carrier is embedded in the mesh, there is also a problem that the brush is bent and the embedded carrier cannot be pulled out.

The carrier separating blade of the carrier-added biological treatment device described in Patent Document 5 is rotated by a friction carrier separation cylinder or rotated at an interval smaller than the particle diameter of the microbial carrier between the outer peripheral surface of the carrier separation cylinder and the outer peripheral surface of the carrier separation cylinder. The carrier separates the wings. Therefore, in the case where the carrier is embedded in the depth of the screen portion, the embedded carrier cannot be pulled out, and the mesh clogging cannot be sufficiently eliminated.

Therefore, the screening device for the wastewater treatment tank provided by the present invention directly and surely eliminates the mesh clogging when the mesh is blocked.

The above problem is solved by providing a screening device provided in a wastewater treatment tank, wherein the screening device is provided with a flow carrier removing portion and a driving mechanism attached to the main body, and the main body includes: a water inlet portion for taking in the processing tank Treatment water inside; and drainage department, draining treated water everywhere The water inlet portion has a rotatable bottomed cylindrical screen portion provided with a filter portion on a circumferential surface, and the flow carrier removing portion is disposed to be close to or abuts against a rotating circumferential surface of the screen portion, and the driving The mechanism is used to rotationally drive the screen portion.

The wastewater treatment (BOD removal, denitrification) is carried out by the action of the microorganisms immobilized on the flow carrier in the treatment tank, and the treatment target water in the treatment tank is discharged to the treatment tank of the second stage. During this discharge, the flow of the flow carrier (porous material) is prevented by the discharge flow passing through the filter portion of the sieve portion. Even if the flow carrier is embedded in the water passing portion of the filter portion and the mesh is blocked, the flow carrier removing portion approaches or abuts against the circumferential surface of the cylinder at the water passing portion due to the rotation of the screen portion, thereby becoming the mesh blocking. The reason for the flow carrier colliding with the flow carrier exclusion portion, causing the flow carrier to be forced away from the water passage, and immediately eliminating the mesh blockage. Further, in the case where the flow carrier-removing portion is made of metal, it is considered that friction and wear can be arranged close to each other, but it may be placed in contact with the resin when it is formed of a resin.

Preferably, the filter portion is formed by a water-passing hole provided in a plurality of groove grooves in the rotational direction, and the flow carrier-removing portion is formed into a comb-tooth shape that engages with the groove. Thereby, even if the flow carrier is deformed and embedded in the groove, the flow carrier can be separated from the filter portion at the comb portion. Thereby, cell clogging caused by the flow carrier is surely eliminated. Further, even if the sludge floating in the tank is accumulated in the groove, the sludge can be separated from the filter portion at the comb portion, and the cell clogging due to the sludge can be surely eliminated.

The above system has a cylindrical shape, and a driving source portion of the driving mechanism is disposed on an upper portion of the body, and the water inlet portion is disposed at a lower end thereof The drain portion is provided, and a drive shaft is provided in the main body portion, and the screen portion provided at a lower end of the drive shaft and the drive source portion are preferably connected by the drive shaft. Thereby, the drive source portion of the drive motor or the speed reduction mechanism or the like can be disposed above the water surface of the treatment tank instead of being disposed in the water. Therefore, there is no need to assemble the drive source portion into a sealed structure.

The drain portion is constituted by a drain cylinder portion that protrudes from the main body and a mounting drain portion that is installed in the processing tank. Preferably, the drain portion and the mounting drain portion are connected and detachably attached. Thereby, the main body side can be separated from the installation drainage portion fixed to the side surface of the treatment tank at the drain pipe portion, so that the treatment tank can be separated and taken out in the original state, and the maintenance (inspection, repair) can be performed. very convenient.

The above problem can also be solved by a wastewater treatment method using the above-described screening apparatus, which is characterized in that wastewater is treated by microorganisms immobilized in a flow carrier in the wastewater treatment tank.

The screening device of the present invention includes a sieve portion that performs a turning operation, and includes a flow carrier removing portion that is disposed close to or abuts against the filter portion (rotational circumferential surface) of the sieve portion, so that the mesh clogging can be surely eliminated.

[Formation of the Invention]

Next, an embodiment of the present invention will be described. The illustrated embodiment is composed of a main body 1, a screen portion 2 provided in the main body 1, a driving mechanism 3, a flow carrier removing portion 4, and an assembly drain portion 5.

The body 1 is in the shape of a vertical cylinder, and is disposed in the processing tank A which will be described later. The upper portion is appropriately positioned above the water level of the treatment tank A, and the lower portion is provided with a height which is a position below the predetermined water level of the treatment tank A. Fig. 1 is a view showing a screening device according to an embodiment of the present invention. As shown in Fig. 1, the main body 1 is provided with a circular opening on the lower end surface, and an annular water inlet portion 11 formed of a resin material is provided at the opening. A drain cylinder portion 12 that communicates with the inside of the body 1 is provided at a suitable height (below a predetermined water level) on the side of the body 1. A joint fitting portion 13 is provided at the open end of the drain cylinder portion 12. The joint fitting portion 13 is a rectangular flange. Further, a hanging loop portion 14 is provided on the upper surface of the main body 1.

Fig. 2 is an enlarged view of the screen portion 2 of Fig. 1. Figure 3 is a cross-sectional view of the screen portion of Figure 1. As shown in FIGS. 2 and 3, the sieve portion 2 is composed of a filter portion 21, a resin cylinder 22, and an upper perforated plate 23. Fig. 4 is an exploded perspective view of the screen portion. As shown in FIG. 4, the filter unit 21 is composed of a bottom plate 211, a plurality of laminated ring plates 212, a plurality of gap forming bodies 213, a lower through hole plate 214, and a laminated joint bolt portion 215.

The filter unit 21 is formed by laminating a plurality of layers of the laminated ring plate 212 having the bolt holes 212a on the inner circumference and the gap forming body 213 having the bolt holes on the circular bottom plate 211. Moreover, the filter unit 21 covers the lower through-hole plate 214, and the entire laminated joint bolt portion 215 is integrally formed. The lower through-hole plate 214 has a shaft coupling portion 214a at the center, and has a radial arm plate 214b and a ring plate portion 214c. In the third drawing, the filter portion 21 is formed by screwing the end portion of the laminated joint bolt portion 215 with a nut. The connecting member used when the members constituting the filter unit 21 are integrally formed is not limited to the laminated connecting bolt portion 215. For example, using a round bar or a corner bar as the connecting member, or by welding the end of the rod The filter unit 21 is formed.

According to the above configuration, the groove groove a having a bottomed cylindrical shape and having a plurality of stages on the outer peripheral surface is formed, and the filter portion 21 serving as the water passing hole b is formed other than the joint portion inside the groove groove a. The width of the groove groove a is narrower than the particle size of the carrier used in the wastewater treatment from the viewpoint that the flow carrier does not flow out of the treatment tank. Here, the width of the groove groove a can be adjusted by the thickness of the gap forming body 213. That is, the width of the above-described groove groove a can be adjusted by merely changing the thickness of the gap forming body 213. Therefore, in the sieving apparatus of the present invention, the filter portion 21 has an advantage that the width of the groove groove a can be adjusted as compared with the case of using a wedge-shaped metal wire or a stamped metal.

In the sieve portion 2, a resin cylinder 22 corresponding to the water inlet portion 11 is interposed between the through-hole plate 23 and the filter portion 21. The through-hole plate 23 has a shaft coupling portion 231 at the center, and has a radial arm plate 232 and a ring plate portion 233.

The drive mechanism 3 is composed of a drive source unit 31 including a drive motor or a speed reduction mechanism, and a drive shaft 32. The driving source portion 31 is disposed on the upper surface of the body 1, and the driving shaft 32 penetrates through the body and penetrates the respective shaft connecting portions 231, 214a of the upper through-hole plate 23 and the lower through-hole plate 214 of the lower screen portion 2, and The joint is fixed to the screen portion 2.

Thereafter, the drive shaft 32 and the screen portion 2 are coupled and fixed, and the resin cylinder 22 is fitted and attached to the water inlet portion 11 in a substantially water-tight state.

The flow carrier removing portion 4 is formed so as to be suspended from the lower side surface of the main body 1 to form a comb tooth portion 41 that protrudes in one of the concave grooves a of the filter portion 21. Here, the dimensions of the groove d and the comb portion 41 will be described using the drawings. Fig. 5 is an enlarged view of a portion surrounded by a solid line in Fig. 2. As shown in Fig. 5, the portion where the comb tooth portion 41 protrudes into the groove groove a of the filter portion 21 is formed such that the laminated ring plate 212 and the comb tooth portion 41 are alternately arranged. Here, the distance from the rotational circumferential surface of the laminated ring plate 212 to the laminated connecting bolt portion 215 is set to d ₁ . Further, the distance from the top of the comb tooth portion 41 to the rotational peripheral surface of the laminated ring plate 212 is set to d ₂ . At this time, although the laminated joint bolt portion 215 is in contact with the top of the comb tooth portion 41, the friction and wear are considered, and the distance d _{2 is} preferably shorter than the distance d ₁ . On the other hand, from the viewpoint of effectively extracting the carrier or the deposited sludge embedded in the groove a, particularly the sludge adhering to the surface of the laminated bolt portion 215, the distance d _{2 is} suitable for the distance. 1/4 of d ₁ is still longer, and is more suitable than 1/2 of the distance d ₁ . Further, as shown in Fig. 5, the distance d ₃ between the rotational peripheral surface of the laminated ring plate 212 and the flow carrier removing portion 4 is preferably shorter than the particle diameter of the flow carrier.

As shown in Fig. 5, the width of the groove groove a is set to w ₁ , and the width of the comb tooth portion 41 is set to w ₂ . At this time, although the surface of the laminated ring plate 212 is in contact with the side surface of the comb tooth portion 41, it is preferable to set the width w ₂ to be narrower than the width w _{1 in} consideration of friction and wear. On the other hand, from the viewpoint of effectively scooping the sludge adhering to the surface of the laminated ring plate 212, the width w _{2 is} preferably set to be wider than 2/3 of the width w ₁ . Further, the shape of the laminated ring plate 212 is not particularly limited, and may be a flat shape or a shape in which the thickness becomes thinner or thicker toward the inner peripheral side. The w _{1 when} the thickness of the laminated ring plate 212 is different can be said to be the width at the widest point of the groove d. From the viewpoint of effectively extracting the sludge adhering to the entire surface of the laminated ring plate 212, as shown in Fig. 5, it is preferable that the laminated ring plate 212 is a flat plate and the adjacent laminated ring plates 212 are parallel.

The shape of the comb tooth portion 41 is not particularly limited. In the illustrated example, the shape of the comb tooth portion 41 is a quadrangle, but is not limited thereto, and may be three. Angle or trapezoidal. The shape of the top surface of the comb tooth portion 41 is also not limited, and the top portion may be flat or rounded. Further, the material of the comb tooth portion 41 is not limited, and a metal or a resin or the like can be used as long as the meshing of the groove d or the water hole b can be surely eliminated. Among them, the comb tooth portion 41 is preferably metal from the viewpoint that deformation or breakage is unlikely to occur with the rotation of the screen portion 2.

Next, the installation position of the flow carrier elimination portion 4 with respect to the sieve portion 2 will be described. Fig. 6 is a cross-sectional view showing the filter unit 21 cut along a plane parallel to the XY plane of Fig. 2 . Further, the arrow of Fig. 6 indicates the direction of rotation of the screen portion 2. Here, as shown in FIG. 6, the comb tooth portion 41 is a point P which is superimposed on the rotational peripheral surface of the laminated ring plate 212. From this, the tangent point P extends in a direction opposite to the direction of rotation as a tangent L ₁ , and the angle formed by the tangent L ₁ and the comb tooth portion 41 is taken as an angle α. From the viewpoint of easily separating the sieved carrier or sludge from the screen portion 2, the angle α is suitable to be an obtuse angle. In particular, the angle a is preferably greater than 90°. On the other hand, the angle α is usually less than 180°.

The inventors attempted to rotate the screen portion 2 in the opposite direction to the rotation direction of Fig. 6 to extract the carrier or sludge embedded in the groove d. At this time, the angle α is an acute angle, that is, less than 90°. As a result, there is a problem that the scooped carrier or sludge is retained between the flow carrier removing portion 4 and the screen portion 2.

The mounting drain portion 5 is composed of a wall surface mounting plate portion 52 that is formed to protrude from the outer periphery of the drain pipe portion 51 and the drain pipe portion 51, and a connecting portion 53 that is provided at the pipe end. The connection portion 53 includes a left and right inner groove portion 531 that allows the connection and attachment portion 13 to be inserted from above, and a lower support protrusion portion 532 that can be placed on the connection and attachment portion 13 .

Next, the drain pipe portion 51 of the drain portion 5 (in the shape of the joint portion 53) The side opposite to the side) is inserted into the drain hole provided in the wall surface of the treatment tank A. The wall mounting plate portion 52 is blocked by the wall surface of the processing tank A, and the fitting drain portion 5 is fixed by anchor bolts or the like. In the above state, the connecting portion 53 protrudes into the processing tank A.

When the main body 1 is assembled in the processing tank A, the main body 1 is lifted by the hanging ring portion 14, and the connecting fitting portion 13 is inserted into the inner groove portion 531 from above the connecting portion 53. Thereafter, the connection fitting portion 13 is placed on the lower support protrusion 532, and in this state, the connection fitting portion 13 and the connection portion 53 are integrally formed, and the body 1 is placed upright into the treatment tank A. At this time, the connection fitting portion 13 and the coupling portion 53 can be fixed by bolts as needed.

The treatment tank A is filled with the treatment target water (waste water) B and the necessary amount of the flow carrier C. The treatment target water B after completion of the predetermined treatment (anaerobic treatment such as BOD removal, nitrogen removal, or aerobic treatment) passes through the inside of the sieve portion 2 and the inside of the body 1 from the filtration portion 21, and then from the drainage portion (the drainage tube portion 12) The drain pipe portion 51) is discharged to the processing tank D of the second stage or the like. At this time, the filter portion 21 prevents the flow carrier C from being discharged together with the discharge flow.

Next, the drive source portion 31 of the drive mechanism 3 is constantly or at an appropriate interval, and the rotary actuator rotates the screen portion 2 by the drive shaft 32.

Therefore, the flow carrier C that flows together with the discharge flow and collides with the filter portion 21 is a porous and sponge-like member, or a deformable member such as a gel-like member, and is partially deformed and embedded in the grooved groove. The possibility within a. Specifically, it flows easily together with the discharge flow and is easily deformed when it collides with the filter portion 21, so that it is easily inserted into the groove d. However, even if such a flow carrier C is fitted into the groove d to cause mesh obstruction, the comb portion 41 can be used to cause the comb portion 41 to pry out the flow carrier C by the rotation of the screen portion 2. result The mesh blocking described above is immediately eliminated. Further, there is a possibility that the floating sludge in the tank which flows together with the discharge flow collides with the filter portion 21, and the floating sludge in the tank is accumulated in the groove d. However, since the comb-tooth portion 41 of the flow carrier removing portion 4 pours out the sludge deposited in the groove d, the above-mentioned mesh blocking is immediately eliminated.

The flow carrier C to be introduced into the treatment tank A may be any member that can immobilize microorganisms. Among them, a gel-like member is preferably used. In the case of a gel-like member, a polyethylene glycol aqueous colloid is preferred. Since the aqueous polyethylene glycol colloid has a plurality of sulfhydryl groups and has high hydrophilicity and high hydrophilicity with a living body, it is suitable as a microbial carrier. Further, it is more preferable to use an acetalized polyethylene glycol aqueous colloid. Thereby, the amount of microorganisms retained can be increased, and the durability at the time of repeated use can be ensured.

In addition, an aqueous solution obtained by dissolving polyethylene glycol and a water-soluble polymer polysaccharide such as alginate is dropped into an aqueous solution containing a polyvalent metal ion such as an aqueous solution of calcium chloride, thereby forming a spherical shape. Then, a spherical hydrogel formed by acetalization using formaldehyde or the like is preferred. According to this method, a uniform spherical gel body can be obtained, so that it is easy to set the width of the groove d. Moreover, the durability at the time of repeated use can be further improved.

When the apparatus (main body 1) requires maintenance or the like, the connection between the connection fitting portion 13 and the coupling portion 53 is released, and the main body 1 is pulled up, so that the main portion of the screening device can be easily removed from the processing tank A. Further, since the cover 15 covering the upper portion of the main body 1 is integrated with the drive source portion 31, the nut that locks the hanging ring portion 14 is removed, and the sieve portion 2 can be taken out from the main body 1. at this time, Since the comb tooth portion 41 protrudes in the groove groove a and is engaged, the flow carrier removing portion 4 that is suspended from the lower side surface of the body 1 can also be removed.

Next, a screening apparatus according to another embodiment of the present invention will be described. In the following description, only the differences from the above-described screening device will be described, and the same components will be denoted by the same reference numerals, and their description will be omitted. Fig. 8 is a view showing a screening device for a wastewater treatment tank according to another embodiment of the present invention. As shown in Fig. 8, a cover 16 is provided on the cover 15 covering the upper portion of the body 1. Further, the cover 15 and the body 1 are fixed by the pulling latch 17.

Further, in the sieving apparatus shown in Fig. 1, the flow carrier removing portion 4 is fixed to the lower side surface of the main body 1 by bolts or the like, but in the sieving apparatus shown in Fig. 8, the flow carrier removing portion 4 and The water inlet portion 11 is integrated by welding or the like. In the screening apparatus shown in Fig. 1, when the screen portion 2 is removed from the main body 1, it is necessary to remove the flow carrier removing portion 4 in advance. However, in the sieving apparatus shown in Fig. 8, the light is released by pulling the latch 17 and pulling the handle 16, so that the screen portion 2 can be easily removed together with the flow carrier removing portion 4. Therefore, in the case where the screen portion 2 requires maintenance or the like, there is an advantage that the heavy body 1 can be left as it is in the treatment tank A, and the screen portion 2 and the flow carrier removal portion 4 can be easily removed.

Further, in the screening apparatus shown in Fig. 1, the member constituting the comb tooth portion 41 cannot be removed from the flow carrier removing portion 4 (see Fig. 2), but in the screening device shown in Fig. 8, Only the member constituting the comb tooth portion 41 can be removed from the flow carrier removing portion 4 (refer to Fig. 9). Therefore, when the comb-tooth portion 41 is repaired, only the members constituting the comb-tooth portion 41 can be removed. Therefore, the workability can be improved as compared with the case where the entire flow-carrier removing portion 4 is removed.

When the body 1 is loaded into the processing tank A, the upper portion of the body 1 is used. The handle 16 is inserted into the inner groove portion 531 from above the connecting portion 53 . Thereafter, the connection fitting portion 13 is placed on the lower support protrusion 532, and in this state, the connection fitting portion 13 and the connection portion 53 are integrally formed, and the body 1 is placed upright into the treatment tank A. When the connection fitting portion 13 and the coupling portion 53 are fixed by bolts, as shown in Fig. 8, it is not necessary to provide a hole for inserting the bolt.

Next, in the case where the above-mentioned apparatus (main body 1) requires maintenance or the like, only the handle 16 of the main body 1 is pulled up, and the main part of the screening apparatus can be easily removed from the inside of the processing tank A.

A preferred embodiment of the present invention is a wastewater treatment method using a sieving apparatus, which is characterized in that wastewater is treated by microorganisms that are fixed to a flow carrier in the wastewater treatment tank.

The flow carrier to be introduced into the wastewater treatment tank may be any member that can fix the microorganisms, and the above-described flow carrier can be used. Further, the method for supporting the microorganisms on the flow carrier is not limited, and a method of adding the flow carrier supporting the microorganisms in advance to the wastewater treatment tank may be employed, or the flow carrier and the sludge may be mixed in the wastewater treatment tank to make the soiled The method by which the microbes of the mud support the flow carrier.

1‧‧‧ Ontology

11‧‧‧Water Department

12‧‧‧Drainage tube

13‧‧‧Link Assembly Department

14‧‧‧ hanging ring

15‧‧‧ Cover

16‧‧‧Handles

17‧‧‧ Pulling the bolt

2‧‧‧Screening

21‧‧‧Filter Department

211‧‧‧floor

212‧‧‧Laminated ring plate

212a‧‧‧Bolt hole

213‧‧‧ gap formation

214‧‧‧Lower perforated plate

214a‧‧‧Axis joint

214b‧‧‧arm

214c‧‧‧ Ring Plate Department

215‧‧‧Layered joint bolts

22‧‧‧ resin cylinder

221‧‧ ‧ step department

23‧‧‧Upper perforated plate

231‧‧‧Axis joint

232‧‧‧arm plate

233‧‧‧ Ring Plate Department

3‧‧‧ drive mechanism

31‧‧‧Drive source

32‧‧‧Drive shaft

4‧‧‧Mobile Carrier Exclusion Department

41‧‧‧ comb teeth

5‧‧‧Assembled drainage department

51‧‧‧Drainage Department

52‧‧‧Wall assembly board

53‧‧‧Connecting Department

531‧‧‧ about the inner ditch

532‧‧‧Bottom support protrusion

A‧‧‧ concave groove

B‧‧‧ water hole

A‧‧‧Processing tank

B‧‧‧Target water (waste water)

C‧‧‧Flower carrier

Processing tank for D‧‧‧

Fig. 1 is a view showing a screening device for a wastewater treatment tank according to an embodiment of the present invention.

Fig. 2 is an enlarged view of the sieve portion of Fig. 1.

Figure 3 is a cross-sectional view of the screen portion of Figure 1.

Fig. 4 is an exploded perspective view of the screen portion of Fig. 1.

Fig. 5 is an enlarged view of a portion surrounded by a solid line in Fig. 2.

Fig. 6 is a cross-sectional view showing the filter portion cut along a plane parallel to the XY plane of Fig. 2;

Fig. 7 is a view showing the state of use of the screening device for the wastewater treatment tank.

Fig. 8 is a view showing a screening device for a wastewater treatment tank according to another embodiment of the present invention.

Fig. 9 is an enlarged view of a sieve portion of the screening device of Fig. 8.

1‧‧‧ Ontology

4‧‧‧Mobile Carrier Exclusion Department

11‧‧‧Water Department

21‧‧‧Filter Department

22‧‧‧ resin cylinder

41‧‧‧ comb teeth

211‧‧‧floor

Claims (5)

A screening device is a screening device disposed in a wastewater treatment tank, wherein the screening device is formed by attaching a flow carrier removing portion and a driving mechanism to the body, the body having: a water inlet portion for taking in the a treatment water in the treatment tank; and a drainage portion that discharges the treated water to the outside of the treatment tank; the water inlet portion has a rotatable bottomed cylindrical sieve portion having a filter portion on the circumferential surface, the flow carrier exclusion portion The driving mechanism is configured to be close to or abutted against the rotating circumferential surface of the screen portion, and the driving mechanism is used for rotationally driving the screen portion. The screening device of claim 1, wherein the filtering portion is formed by a water-passing hole provided in a plurality of groove grooves in a rotating direction, and the flow carrier removing portion is formed to mesh with the groove. Comb shape. The screening device of claim 1 or 2, wherein the system has a cylindrical shape, a driving source portion of the driving mechanism is disposed at an upper portion of the body, the water inlet portion is disposed at a lower end, and the drainage portion is laterally disposed at a side surface. A drive shaft is disposed in the main body portion, and the screen portion provided at a lower end of the drive shaft is coupled to the drive source portion by the drive shaft. The screening device of claim 3, wherein the drainage portion is constituted by a drainage cylinder portion protruding from the main body and an assembly drainage portion installed in the treatment tank, wherein the drainage portion and the assembly drainage portion are provided The structure of the joint loading and unloading. A sizing apparatus according to any one of claims 1 to 4, characterized in that the wastewater is treated by microorganisms of a flow carrier fixed in the wastewater treatment tank.