JP2883773B2 - Biofilm water treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating disk apparatus for purifying river water and wastewater using a biofilm, and more particularly to a rotary disk apparatus used for forming a biofilm for purification. The present invention relates to a biofilm attachment member for a rotating disk.

[0002]

2. Description of the Related Art The biofilm method is used not only for drainage but also for purification of river water with a small amount of substrate. In the biofilm method, for example, organic matter, phosphorus, nitrogen and the like in wastewater are ingested and removed by organisms existing in the biofilm under aerobic conditions. In the biofilm method, the biofilm attachment member is formed by attaching the biofilm to a rotating disk having a large surface area so that the biofilm can come into contact with the water to be purified as much as possible. In such a conventional biofilm method, the rotating disk is made of a material such as plastic, metal, and ceramics. The biofilm is formed so as to be easily adhered by, for example, attaching a curled fiber to the uneven surface or mesh.

[0003]

However, in the biofilm method, since the rotating disk requires a certain strength, when the rotating disk is made of plastic, it is formed to be relatively thick. Is formed to serve as a spacer and to reinforce it. When the uneven portion is used as a spacer in this way, organisms attached to the surface of the rotating disk proliferate, and when the biofilm becomes thicker, for example, blockage occurs between the convex portions, and a new space between the rotating disks is formed. There is no longer any invasion of purified water, and there is insufficient contact between the biofilm and the purified water, resulting in reduced purification efficiency, which is a problem.

When the rotating disk is formed into a mesh, if the mesh becomes fine, the biofilm grows and loosens, etc., so that the gap between the biofilms becomes inconsistent and a part of the biofilm is clogged. It is a problem. Therefore, even if the net is reinforced so as not to be loosened, it is difficult to reinforce the net so that it is not easily deformed. Therefore, a relatively thick metal net is used. A net using such a thick metal wire is heavy in weight, requires a large amount of power to be used, and has a problem that power and material costs are increased. Moreover, such a relatively thick wire netting takes a long time to form a biofilm because it is difficult for organisms to adhere to it.
Even if plastic fibers are entangled in order to accelerate the formation of a biofilm, it is not sufficient, and it is a problem that it requires a relatively long time. An object of the present invention is to solve the problems of the conventional rotating disk with respect to the adhesion of organisms, the contact between biological films and purified water, and the weight.

[0005]

SUMMARY OF THE INVENTION The present invention provides a method for forming a biofilm.
Is performed uniformly, easily and quickly, and is light in weight.
To provide a biofilm-attached member for rotating plates that can be easily reinforced.
It is intended to provide. That is, the present invention
The biofilm attachment members abut each other on the sides to
The rotating plate for biofilm attachment is
Biofilm water treatment equipment(1)
Is the axis of rotation(2)Inner frame that touches the periphery of(3)When,Previous
Forming the outer peripheral portion of the biofilm attachment member (1)The inner frame
Outer frame longer than body(6)And the inner frame(3)And outside
Side frame(6)Connect the corresponding side ends of the
Extend radiallyShaft insertion hole (1
2) having an overhanging piece (14) formed withSide
Frame(4 and 5) And is formed in a trapezoidal shape.
AndThe central part of the inner frame (3) and the central part of the outer frame (6)
To form a shaft rod insertion hole (12) for superposition.
Central frame for reinforcement with fixed part (13) provided
(7) is formed, The side frame(4 and 5)And outer frame
body(6)At the junctionShaft insertion hole (1
2) is formedCorner board(15)Is formed,Each of the above
axisrodInsertion hole(12)Around one of the openingsrodInsertion
Through hole(12)And a tubular member (16) protrudes a predetermined length.
Out, said trapezoidshapeofBiofilm attachment member (1)Said
Tubular member(16)On the side opposite to the side where the20No
Solstice50It is characterized by a mesh mesh
Biofilm water treatment apparatus, and the present invention provides a plurality of
The biofilm attachment members abut each other on the sides to
The rotating plate for biofilm attachment is
Biofilm water treatment equipment(1)
Is the axis of rotation(2)Inner frame that touches the periphery of(3)When,Previous
Forming the outer peripheral portion of the biofilm attachment member (1)The inner frame
Outer frame longer than body(6)And the inner frame(3)And outside
Side frame(6)Connect the corresponding side ends of the
Extend radiallyShaft insertion hole (1
2) having an overhanging piece (14) formed withSide
Frame(4 and 5) And is formed in a trapezoidal shape.
AndThe central part of the inner frame (3) and the central part of the outer frame (6)
To form a shaft rod insertion hole (12) for superposition.
Fixed part (1 Central frame for reinforcement provided with 3)
(7) is formed, The side frame(4 and 5)And outer frame
body(6)At the junctionShaft insertion hole (1
2) is formedCorner board(15)Is formed,Each of the above
axisrodInsertion hole(12)Around one of the openingsrodInsertion
Through hole(12)And a tubular member (16) protrudes a predetermined length.
Out, said trapezoidshapeofBiofilm attachment member (1)Said
Tubular member(16)On the side opposite to the side where the20No
Solstice50Mesh mesh net is stretched, said plurality of
The biofilm-adhering member (1) includes a corresponding inner frame and an outer frame, respectively.
The frame body and the side frame body are overlapped with an interval
Each stackedShaft rodThe insertion hole (12) and the tubular member (1
In the hole of 6), a shaft rod (11) for fixing the biofilm attachment member is provided.
Inserted and fixed, the biofilm attachment block (10)
Forming a plurality of biofilm attachment blocks (10),
From around the rotation axis (2) around the rotation axis (2),radiation
directionHusbandPlacedTogether with,The plurality of biofilm attached
Lock (10)Protrusions (19) on opposite sides
Arranged between a plurality of sets of fixing frame members (17).
Frame member(17)At the end
Is a support plate having bolt holes (20)(21)Is
Bolt (22) passing through the bolt hole (20)
It is installed upright so as to be perpendicular to the outer peripheral surface of the
And a bolt (22) passing through a bolt hole (20) of the support plate.
Is a biofilm attachment block extending in the axial direction of the rotation axis (2).
Both sides of the holding plate (24) for holding both outer edges of (10)
Pass the bolt hole (29) at the end and support the holding plate (24).
Biofilm water fixed to a holding plate (21)
In the processing unit.

[0006] In the present invention, the biofilm-adhering member forms a contact rotating plate for biofilm water treatment by attaching a plurality of side portions to the rotating shaft in an annular shape with the side portions abutting each other. Therefore, in the present invention, the frame forming the skeleton of the biofilm-attaching member has a shorter rotating shaft side and a longer outer circumferential side, and is formed in a trapezoidal or sector shape as a whole. In the present invention, a mesh member for attaching a biofilm is fixed to at least one surface of the frame of the trapezoidal or fan-shaped rotating plate for attaching a biofilm by an appropriate method. This fixing can be performed by an appropriate fixing means such as an adhesive or a fixing tool.

[0007] In the present invention, the net-like member is 20 to 5
A mesh having a mesh of 0 mesh and an opening of 0.2 to 1 mm can be used. This net is 0.2-0.6
a wire diameter of mm, can be a corrosion resistant steel of metal such as plastic or stainless, the space ratio, 30乃
It is 50%, which is extremely light as compared with a conventional biofilm-attached member.

[0008] In the present invention, the biofilm-attaching member is formed by stacking a plurality of corresponding inner frames, outer frames, and side frames at an interval from each other, and forming one of the shaft insertion hole and the corner plate of the overlapping corner plate. A shaft rod for fixing a biofilm attachment member such as a bolt is inserted into the hole of the tubular member of the spacer provided on the side of Are formed in parallel at predetermined intervals in the axial direction of the biofilm. In the present invention, a plurality of biofilm attachment blocks are attached around the rotation axis. In the present invention, the biofilm-adhering block is provided while being held between fixing frame members for attaching the biofilm-adhering block provided in the axial direction of the rotating shaft so as to be easily removed. Attachment of the membrane-adhering block can be performed by inserting the biofilm-adhering block between the fixing frame members. Removal of the biofilm-adhering block can be performed from between the biofilm-adhering block fixing frame members. Can be done by pulling out

In the present invention, the biofilm attachment block comprises:
After mounted on the rotary shaft, the edge of the parallel outer peripheral surface in the axial direction of the rotary shaft, never even fall off by turning the by Ri rotation axis that pressed by the pressing plate. The holding plate is formed so as to be longer than the width of the biofilm-adhering block, and protrude from both ends of the biofilm surface block when attached to the biofilm-adhering block. Bolt holes are formed at both ends of the holding plate at portions protruding from the biofilm surfaces at both ends of the biofilm attachment block so that the holding plate can be detached. The holding plate supports the weight of the biofilm-adhering block during use, and needs to have sufficient strength to support the biofilm-adhering block. Further, a support plate provided with a bolt hole is provided upright at the end of the fixing frame member. Bolts are passed through the bolt holes at the ends of the support plate and the holding plate, and the holding plate is bolted to the supporting plate. Stop it. In the present invention, the fixing frame member may be provided directly on the rotating shaft, or may be attached to the rotating shaft by fitting an annular member having the fixing frame member standing radially.

[0010]

The present invention comprises an inner frame and an outer frame which is longer than the inner frame, connects the corresponding ends of the inner and outer frames, and extends radially with respect to the rotation axis. The frame is formed into a trapezoidal or fan-shaped frame with a frame, and a plastic or metal mesh of 5 to 100 mesh is stretched on one surface of the frame, so that a lightweight biological A membrane rotator can be manufactured. Therefore,
The biofilm rotating body of the present invention can easily reinforce the frame and the net, and even if the frame and the net are reinforced, the weight does not become so heavy and the net can be easily replaced. In addition, according to the present invention, since the rotating plate for attaching a biofilm is formed of a fine mesh, the speed of attaching organisms to the rotating plate is high, and a biofilm can be formed in a relatively short time.

According to the present invention, a biofilm adhesion block is formed by stacking a plurality of biofilm adhesion members, and the biofilm adhesion block is attached around a rotation axis by a fixing frame member and a holding plate to form a biofilm rotation body. Since the biofilm-adhering block is attached, the biofilm-adhering block is inserted between the fixing frame members, the edge of the outer peripheral surface of the biofilm-adhering block is pressed with a pressing plate, and the outer peripheral surface is pressed. Since the plate is bolted to the fixing frame member, the attaching operation of the biofilm attaching block is simple. The removal of the biofilm-adhering block from the rotating shaft can be performed by removing the holding plate from the fixing frame member and extracting the biofilm-adhering block from between the fixing frame members. Therefore, according to the present invention, the replacement operation of the biofilm-adhered block is simplified, and the replacement of the biofilm-adhered block does not require much time, so that the water treatment by the biofilm can be performed with relatively high efficiency. In addition, since it is formed to be lightweight as a whole, power costs and material costs can be reduced, and water treatment costs can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited by the following description and illustrations. FIG. 1 is a schematic plan view of a biofilm-adhering member used in one embodiment of the water treatment apparatus of the present invention, and FIG. 2 is a schematic AA cross section of the biofilm-adhering member shown in FIG. FIG. FIG. 3 is a schematic partial side view showing an example in which a plurality of biofilm-attaching members used in an embodiment of the water treatment apparatus according to the present invention are stacked and attached. In FIG. 3, the net is attached to the upper surface of each biofilm attachment member, but is not shown. FIG. 4 is a schematic partial front view showing an example of attaching a biofilm-adhering block to a holding frame in one embodiment of the water treatment apparatus of the present invention, and FIG.
FIG. 5 is a schematic mounting diagram showing a mounting relationship of the biofilm-adhering block in FIG. 4 to a holding frame.

In this embodiment, the biofilm-attaching member 1 is formed in a trapezoid as a whole, and has an inner frame 3 located on the rotating shaft 2 side, and extends radially from the inner frame to the rotating shaft 2. Two long side frames 4 and 5 are provided, and an outer frame 6 is provided between the ends of the two side frames 4 and 5.
In the present embodiment, the central portion of the inner frame 3 and the central portion of the outer frame 6 are connected, and a reinforcing central frame 7 made of an L-shaped section is formed radially with respect to the rotation shaft 2. I have. In this example, a key-shaped protruding portion 7 'is formed in the center frame in order to use an L-shaped member, and this protruding portion acts as a stirring blade in the stirring process. In this example, the inner frame 3 and the outer frame 6 intersect perpendicularly with the central frame 7.
A reinforcement frame 8 is provided by butt-welding both ends to the side frames 4 and 5.

Therefore, in this embodiment, the frame of the biofilm-attaching member is formed by the inner frame 3, the side frames 1 and 5, the outer frame 6, the center frame 7, and the reinforcing frame 8. . In this example, the frame material of each frame forming these skeletons is made of vinyl chloride resin, and on the front side of each frame,
30 mesh stainless steel (opening 0.598mm,
The net 9 having a void ratio of 49.05%) is press-bonded by hot melt, embedded with a wire diameter of 0.254 mm, and welded. Therefore, in this example, the weight per rotating plate area is 1.3 Kg / m ^2, which is light.

In this embodiment, the biofilm-adhering member 1 is formed on the biofilm-adhering block 10 by stacking a plurality of frames. Therefore, the central frame 7 of the biofilm attachment member 1
A fixing portion 13 having an insertion hole 12 is provided to allow the fixing shaft 11 to be inserted at the time of superposition. In addition, an overhanging piece 14 in which an insertion hole 12 for inserting the fixing shaft 11 is formed in both side frames 4 and 5.
Further, a corner plate 15 having an insertion hole 12 for inserting the fixing shaft 11 is provided inside the connection portion between the side frames 4 and 5 and the outer frame 6. I have.
In this example, the insertion hole 12 ′ of the fixing portion 13 provided on the inner side in the axial direction of the central frame 7 is for inserting the fixing shaft rod 11 ′, and is formed larger than the other insertion holes 12. I have.

In this embodiment, the biofilm-adhering block 10 is assembled by inserting a fixing shaft 11 such as a bolt through the respective insertion holes 12 and 12 '. In this example, on the side where the shaft 11 protrudes from the insertion holes 12, 12 ',
A tubular member 16 protruding in a tubular shape is formed surrounding the insertion holes 12, 12 '. The tubular member 16 functions as a spacer for keeping the distance between the biofilm-adhering members 1 in the biofilm-adhering block 10 constant. In this example, the center frame 7 of the biofilm-attached member 1 is made of a plastic material having an L-shaped cross section, such as a vinyl chloride resin, and the other frames are formed of flat plates. However, all frames can be L-shaped to further enhance the strength of the biofilm attachment member .

In this embodiment, the biofilm attachment block 10
Are mounted around the rotation shaft 2 so as to surround the rotation shaft 2. In this example, an annular member 18 having a biofilm-attached block holding frame 17 extending radially with respect to the rotating shaft 2 is fitted to the rotating shaft 2. The annular members 18 are provided with the biofilm-attached block holding frames 17 facing each other at intervals in the axial direction so that the biofilm-adhered blocks 10 are inserted and held between the holding frames 17. In this example, the biofilm-attached block holding frame 17 has a cross section T
Stainless steel shaped members are used.
The T-shaped protrusions 19 are arranged so as to face each other in the axial direction. A support plate 21 having bolt holes 20 is provided upright outside the biofilm-attached block holding frame 17. The posture of the support plate 21 with respect to the holding frame 17 is selected such that the bolt 22 passing through the bolt hole 20 intersects perpendicularly with the outer peripheral surface 23 of the biofilm attachment block 10.

In this embodiment, the outer peripheral surface 23 of the biofilm-adhering block 10 disposed between the holding frames 17 is
Is held down so as not to fall off. The area pressed by the pressing plate 24 is an edge 25 extending in the axial direction of the outer peripheral surface 23 of the biofilm-adhering block 10.
The edge 25 is reinforced by the corner plate 15 so as not to deform the 5. The holding plate 24 is formed to be longer than the thickness of the biofilm-adhered block 10, and is formed so as to protrude from both outer frame surfaces of both ends of the biofilm-adhered block 10 and both end biofilm surfaces 26. Bolt holes 29 are formed in portions 27 of the holding plate 24 protruding from the biofilm surfaces 26 at both ends of the biofilm attachment block 10 so that the holding plate 24 can be fixed to the support plate 21 with bolts 28.

Since the present embodiment is configured as described above, the annular member provided with the holding frame 17 is fitted to the rotating shaft 2,
A predetermined number of biofilm attachment blocks 10 are inserted between the holding frames 17. When the biofilm-adhering block 10 is inserted between the holding frames 17, the holding plate 24 is moved to the biofilm-adhering block 1.
The biofilm-adhering block can be attached to the rotating shaft 2 by abutting against the edge 25 of the outer peripheral surface 23 of the “0” and passing through the bolts 28 fixed to the support plate 21 through the bolt holes 29 at both ends and using nuts. When removing the biofilm-adhering block 10 from the holding frame 17, loosen the bolts of the holding plate 24, remove the holding plate 24 from the outer peripheral surface 23 of the biofilm-adhering block 10, and remove the biofilm-adhering block 10 from the holding frame 17.
It can be done by extracting from between. In this embodiment, the holding frame 17 is made of stainless steel, but may be made of other metal, plastic, or reinforced plastic having excellent corrosion resistance.

[0020]

The present invention comprises an inner frame and an outer frame which is longer than the inner frame, connects the corresponding ends of the inner frame and the outer frame, and forms a radial line with respect to the rotation axis. With an extended side frame, formed in a trapezoidal or fan-shaped framework,
Since a mesh of 20 to 50 meshes made of plastic or metal is stretched on one surface of this framework, the biofilm rotator according to the present invention has a smaller size than a conventional biofilm rotator. Extremely light weight, reduced power costs and easy handling. Therefore, the biofilm rotator of the present invention makes it easier to reinforce the frame and the net as compared with the conventional biofilm rotator. Therefore, compared to the conventional biofilm rotating body, organisms can be formed on the rotating plate more quickly, and the water treatment speed can be performed efficiently.

According to the present invention, the operation of attaching and detaching the biofilm-adhering block can be easily performed by attaching and detaching a holding plate for holding the edge of the outer peripheral surface of the biofilm-adhering block. Therefore, the biofilm rotating body is formed by being attached around the rotating shaft by the fixing frame member and the holding plate, so that the biofilm rotating body is formed by bolting to the conventional fixing frame member. In the biofilm water treatment apparatus according to the present invention, the operation of replacing the biofilm-adhering block is simple, and the time can be shortened. As described above, according to the present invention, the replacement operation of the biofilm-adhered block is simplified, and it is not necessary to spend much time to replace the biofilm-adhered block. Since the water treatment can be performed with relatively high efficiency, and the biofilm-adhering block is formed to be light overall, the power cost and the material cost can be reduced, and the water treatment cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a biofilm attachment member used in an embodiment of the water treatment apparatus of the present invention.

FIG. 2 is a schematic AA of the biofilm attachment member shown in FIG.
It is sectional drawing.

FIG. 3 shows an example in which a plurality of biofilm-attaching members used in an embodiment of the water treatment apparatus of the present invention are attached in a stack.
FIG. 3 is a schematic partial side view showing a partly broken portion.

FIG. 4 is a schematic partial front view showing an example in which a biofilm attachment block is attached to a holding frame in one embodiment of the water treatment apparatus of the present invention.

FIG. 5 is a schematic attachment diagram showing the attachment relationship of the biofilm attachment block to the holding frame in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Biofilm attachment member 2 Rotating shaft 3 Inner frame 4 Side frame 5 Side frame 6 Outer frame 7 Central frame 7 'Stirrer blade part protruding from central frame 8 Reinforcement frame 9 Net 10 Biofilm adhesion block 11, 11' Fixed Shaft 12, 12 ′ Inserting hole for fixing shaft 13 Fixing part 14 Overhanging piece 15 Corner plate 16 Tubular member 17 Biofilm adhesion block holding frame 18 Ring member 19 T-shaped protrusion 20, 28, 29 Bolt hole DESCRIPTION OF SYMBOLS 21 Support plate 22 Bolt 23 Outer peripheral surface of biofilm adhesion block 10 24 Holding plate 25 Edge of outer peripheral surface 23 26 Biofilm surface at both ends 27 Portion protruding from biofilm surface at both ends

Claims (3)

(57) [Claims] 1. A biofilm adhering member in a biofilm water treatment apparatus in which a plurality of biofilm adhering member force side portions abut each other and are arranged in a ring around a rotation axis to form a biofilm adhering rotating plate. (1) an inner frame (3) in contact with the periphery of the rotation axis (2) , and an outer periphery of the biofilm attachment member (1)
And an outer frame body (6) longer than the inner frame body, and corresponding side end portions of the inner frame body (3) and the outer frame body (6) connected to each other so as to be radial to the rotation axis. Extend for superposition
Overhanging piece in which the shaft rod insertion hole (12) is formed
Central portion and the outer side frame member Ru with a (14) (4 and 5) are formed in a trapezoidal shape and a, inner frame (3)
Connecting the center of the frame (6) and inserting the shaft for superposition
Complement including a fixing portion (13) in which a hole (12) is formed.
A heavy-duty central frame (7) is formed, and the side frames (4 and
Beauty 5) and the axis for the junction of the outer frame (6) superposed
Formed corner plate bar inserting hole (12) is formed (15), wherein the one peripheral openings of the respective axes bar inserting hole (12), surrounds the shaft rod insertion hole (12) tubular A member (16) protruding a predetermined length, wherein the trapezoidal shape biofilm attaching member is provided;
The biofilm water treatment apparatus according to (1), wherein a mesh of 20 to 50 mesh is provided on a surface of the tubular member (16) on a side opposite to a protruding side. 2. A biofilm adhering member in a biofilm water treatment apparatus in which a plurality of biofilm adhering members are arranged in an annular shape around a rotating shaft with their side portions facing each other to form a rotating plate for biofilm adhering. (1) an inner frame (3) in contact with the periphery of the rotation axis (2) , and an outer periphery of the biofilm attachment member (1)
And an outer frame body (6) longer than the inner frame body, and corresponding side end portions of the inner frame body (3) and the outer frame body (6) connected to each other so as to be radial to the rotation axis. Extend for superposition
Overhanging piece in which the shaft rod insertion hole (12) is formed
Central portion and the outer side frame member Ru with a (14) (4 and 5) are formed in a trapezoidal shape and a, inner frame (3)
Connecting the center of the frame (6) and inserting the shaft for superposition
Complement including a fixing portion (13) in which a hole (12) is formed.
A heavy-duty central frame (7) is formed, and the side frames (4 and
Beauty 5) and the axis for the junction of the outer frame (6) superposed
Formed corner plate bar inserting hole (12) is formed (15), wherein the one peripheral openings of the respective axes bar inserting hole (12), surrounds the shaft rod insertion hole (12) tubular A member (16) protruding a predetermined length, wherein the trapezoidal shape biofilm attaching member is provided;
The side opposite to the surface protruding a tubular member (16) in (1) has been stretched the mesh of the net of 20 to 50 Metsushu, the plurality of biofilm attachment member (1), respectively corresponding inner The frame body, the outer frame body and the side frame body are overlapped at an interval from each other, and in each of the overlapped shaft rod insertion holes (12) and the tubular member (16), a biofilm attachment member is fixed. The shaft rod (11) is inserted and fixed to form a biofilm-adhering block (10), and the plurality of biofilm-adhering blocks (10) are arranged around the rotation axis (2). from around 2), Rutotomoni are respectively arranged in the radial direction, said plurality
Are disposed between a plurality of sets of fixing frame members (17) each having a projection (19) formed on the opposite side of the biofilm-adhering block (10 ).
At the end of the outer peripheral portion, a support plate (21) having a bolt hole (20) is provided with a bolt (2) passing through the bolt hole (20).
2) is erected so as to be orthogonal to the outer peripheral surface of the biofilm attachment block (10), and the bolt hole (20) of the support plate is provided.
Through the bolt holes (29) at both ends of the holding plate (24) extending in the axial direction of the rotating shaft (2) and holding both outer edges of the biofilm attachment block (10).
A biofilm water treatment apparatus, wherein a holding plate (24) is fixed to a support plate (21). 3. The biofilm-adhering member further comprises an inner frame.
A center frame (7) connecting the center of (3) and the center of the outer frame (4) , and both ends crossing the center frame (7) and having both ends. A reinforcement frame (8) fixed to (4 and 5).
Or the biofilm water treatment apparatus according to 2.