JPS62201694A - Rotary disk-type waste water treating device - Google Patents

Abstract

PURPOSE:To easily remove suspended matter by horizontally providing a filter cylinder capable of being freely rotated and having an inlet on one end and an outlet on the other end above the water surface in a rotary disk vessel, and furnishing plural rotary disks on the outer periphery of the filter cylinder. CONSTITUTION:The filter cylinder 4 which can be freely rotated is horizontally provided above the water surface in the rotary disk vessel 1, a waste water inlet 2 is opened on one end, and an outlet 3 for discharging the filter cake in waste water into the vessel 1 through a peripheral wall 17 is opened on the other end. Plural rotary disks 5 are provided in parallel in the axial direction on the other periphery of the filter cylinder 4, and the lower part is immersed in water. Consequently, suspended matter can be easily and efficiently removed, a microbial film can be grown over the whole surface of the rotary disk, the waste water to be treated is never discharged by a short circuit, the microbial film on the rotary disk can be excellently grown, and the device can be compactly formed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a rotating disk type wastewater treatment device for treating wastewater such as domestic wastewater and organic industrial wastewater.

[Background Art 1 Aerobic treatment methods for organic wastewater include activated sludge method, water sprinkling bed method, and rotating disk method (contact plate method). These wastewater treatments utilize the fact that aerobic microorganisms ingest water-soluble organic matter in wastewater as nutrients and decompose it into carbon dioxide, water, etc. through respiration. In general, domestic wastewater and organic industrial wastewater contain a large amount of suspended solids in addition to water-soluble organic matter, and some of this is sorbed by microorganisms or biofilms, but microorganisms in suspended solids The removal capacity is much smaller than that of water-soluble organic substances. For this purpose, suspended solids are usually removed by allowing the inflowing wastewater to stagnate and separate by sedimentation. This method requires a large sludge, and further requires a device for drawing out and removing the settled sludge of suspended solids, and also requires its management.

On the other hand, wastewater treatment equipment using the rotating disk method is formed by attaching a large number of rotating disks to a rotating shaft and arranging them in a rotating disk tank. The rotary shaft is driven while immersed under the water surface of the wastewater in the plate tank, and the wastewater is subjected to aerobic biological treatment by aerobic microorganisms grown on the surface of the rotating disk. However, the problem with wastewater treatment equipment using this rotating disk method is that normally only about 1/4 of the diameter of the rotating disk is immersed in the wastewater, and it is close to the rotation axis. In a portion (occupying about 1/4 of the total area), the rotating disk hardly comes into contact with the drainage water and does not get wet. In this way, microorganisms cannot grow on the surface of the rotating disk that does not get wet with drainage water, and this area becomes a dead space that does not contribute to wastewater treatment.Therefore, in order to cover this dead space, the rotating disk It is necessary to make the outer diameter of the tank large, which causes problems such as the need to make the tank large.

In addition, in a wastewater treatment device using the rotating disk method, the conventional method for inflowing wastewater into the rotating disk tank and discharging treated wastewater is generally as shown in Fig. 5 (a), (t+), and (c). be. In Fig. 5 (aHb) and (c), the rotation axis 1
A schematic diagram of a wastewater treatment device is shown in which a large number of rotating disks 5 that are rotationally driven by a rotary disk tank 1 are arranged in a rotating disk tank 1, and the arrow a indicates the direction in which a large number of rotating disks 5 are introduced into the rotating disk tank 1. The b arrow indicates the supply state of the wastewater to be treated to the rotating disk 5, and the arrow b indicates the discharge path of the treated wastewater treated within the rotating disk N1. The system shown in FIG. 5(a) is a system in which almost equal amounts of wastewater are supplied to each rotating disk 5, but in this case, the microbial film on the surface of each rotating disk 5 is Nutrients are evenly distributed, which is favorable for the growth of microorganisms, but there is a risk that the wastewater supplied to the rotary disk 5 at the end near the discharge section may be short-circuited and discharged without being sufficiently processed by the microorganisms. be. Also, Figure 5 (
b) In Norano, the wastewater to be treated introduced into the rotating disk tank 1 is treated by all the rotating disks 5, so there is no risk of short-circuit discharge as described above, but there is no risk of short circuit discharge at the discharge section. As the treatment progresses, the waste water with few nutrients acts on the rotating disk 5 at the near end, and the microorganisms in the rotating disk 5 at the near end are likely to starve, and the waste water from the rotating disk 5 at the end is easily affected. The processing efficiency will be reduced. In contrast, in the case of Fig. 5 (,), a large amount of wastewater to be treated is supplied to the rotating disk 5 at the starting end, and the amount of wastewater supplied to the rotating disk 5 gradually decreases toward the end. In this system, the advantages of Figure 5 (a) and Figure 5 (b) can be utilized to alleviate the disadvantages of each, and the most It can be said that this is a good method. However, with this method, it is necessary to distribute and set the amount of wastewater supplied to each rotary disk 5, which requires a device for distributing, which causes problems such as complicating the structure of the wastewater treatment device. be.

[Objective of the Invention 1] The present invention has been made in view of the above points, and can easily and efficiently remove suspended solids without the need for sedimentation and separation, and also uses a rotating disk. It is possible to grow a microbial film over the entire surface of the rotary disc, and there is no risk of short circuiting and discharge of wastewater to be treated, the growth of the microbial film on the rotating disk is good, and it can be formed compactly. The object of the present invention is to provide a rotating disk type wastewater treatment device.

[Disclosure of the Invention] According to the present invention, the rotary disk tank 1 is arranged above the water surface in the rotating disk tank 1 so as to be freely rotatable with the axial direction facing sideways, and one end is opened as an inlet 2 for introducing waste water. and a filter cylinder 4 whose other end is opened as a discharge port 3 for discharging filtration residue in the waste water that is introduced into the rotating disk tank 1 through the peripheral wall;
A rotary disk type wastewater treatment device characterized in that it comprises a plurality of circulation disks 5 attached to the outer periphery of a filter tube 4 in parallel along the axial direction thereof and whose lower part is immersed under the water surface. In addition, the rotary disc tank 1 is arranged above the water surface in the rotary disk tank 1 so as to be freely rotatable with the axial direction facing sideways, and one end is opened as an inlet 2 for introducing waste water, and the other end is opened as an inlet 2 for introducing waste water. A filter cylinder 4 having an opening as a discharge port 3 for discharging filter residue in waste water filtered into the rotating disk tank 1 through the peripheral wall, and 1!
! A plurality of rotary disks 5 are attached to the outer circumference of the rotary disk 4 in parallel along the axial direction, and the lower part thereof is immersed under the water surface. According to a second invention, there is provided a rotating disk type wastewater treatment device characterized in that a wastewater supply container 6 for pumping up the wastewater in the rotating disk WIl and supplying it to the inlet 2 of the filter cylinder 4 is constructed by J[. Further, it is arranged above the water surface in the rotating disk tank 1 so that it can be rotated freely with its axial direction being outside the premises, and one end is opened as an inlet 2 for introducing waste water, and the other end is inserted through the peripheral wall. A filter cylinder 4 is opened as a discharge port 3 for discharging filter residue in waste water filtered into the rotating disk tank 1, and a plurality of filter cylinders are attached to the outer periphery of the filter @ 4 in parallel along the ring direction, and the lower part is The rotating disk 5 is immersed under the water surface, and the cushion tank 8 attached to the outer peripheral end of the rotating body 7 which is driven to rotate integrally with the 111-A cylinder 4 and into which waste water is introduced is drained from the rotating body 7. A third aspect of the present invention is a rotating disk type wastewater treatment apparatus characterized by comprising a wastewater introduction container 9 that pumps up wastewater as it rotates and supplies it to the introduction port 2 of the filter cylinder 4.

In the present invention, by using the tt filtration front cylinder 4 which also functions as the rotating shaft of the rotating disk 5, the waste water is introduced into the filtration cylinder 4 and the filtered residue of the waste water is discharged. This makes it possible to easily remove suspended solids and perform the necessary sedimentation treatment efficiently.Also, the waste water introduced into the filter tube 4 passes through the peripheral wall of the filter frIi4, and then passes through the surface of the rotating disk 5. The water flows from the base to the outer periphery, and the entire surface of the rotating disk 5 is constantly wetted with wastewater, allowing the microbial film to grow well on the entire surface of the rotating disk 5.Furthermore, it is introduced into filtration@4. A large amount of the wastewater introduced from the port 2 is filtered through the peripheral wall in a portion close to the port 2, and the amount of water passing through the filtration gradually decreases as it moves away from the port 2. A large amount of drainage water is supplied to the rotary disk 5 at the terminal end.
The amount of wastewater supplied to the rotating disk tank 1 is distributed so that it gradually decreases, so that there is no risk that the wastewater that has not been sufficiently treated will be short-circuited and discharged from the rotating disk tank 1, and each rotating disk 5 The growth of microbial films on the surface of each rotating disk 5 can be improved by applying wastewater containing nutrients to the rotating disks.

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

rjs1 Figures (a) and (b) show an entire embodiment of the present invention, in which a partition plate 14.
15, a bush 1 tank 8, a rotating disk tank 1, and a residue storage tank 27 are formed. The filter cylinder 4 is arranged inside this rotating disk tank 1,
m4 As shown in the figure, there is an outer fra16 on the outer periphery of the filtration f14.
is provided, and the outer cylinder 16 has a large diameter filter cylinder part 1f3.
a and a discharge cylinder part IGb having a small diameter at one end, and a recess 18 is formed all around the inner periphery of the filter cylinder part 16a. The outer fa 16 is a cylinder made of stainless steel plate with punch holes, etc., and is formed with a large number of small drainage holes.
The recess 18 on the inner periphery of the Gg is filled with a porous cylinder 17 made of a plastic closed foam, and the porous cylinder 1
A filter medium 20 made of a material with low risk of clogging, such as filter cloth, wire mesh, closed plastic foam, etc.
is stretched around the entire circumference. The discharge tube portion 16b is not provided with a small drainage hole, and a driven gear 21 is attached to the outer periphery of the discharge tube portion 16b. The filter cylinder 4 opens as an inlet 2 at the nAfflS of the filter cylinder part 16a, and opens as a discharge port 3 at the end of the discharge cylinder part 16b. Further, a rotating disk 5 made of foamed plastic or the like is fixedly attached to the outer periphery of the filter tube portion 16a of the outer tube 16 so as to protrude outward. A large number of rotary disks 5 are provided parallel to each other at appropriate intervals along the longitudinal direction (ring direction) of the outer ff11G. In the embodiment shown in FIG. Each rotating disk 5 is rotated so that its diameter becomes smaller sequentially toward the rotating disk 5 on the discharge port 3 side.
The size of is set. As shown in FIG. 3(b), a plurality of drainage supply containers 6 formed by cups along the outer periphery are provided at the outer peripheral end of the rotary disk 5 at the starting end located on the side of the inlet 2.
is attached, and one end of a screw figure 23 is fixed to a through hole 22 formed so as to communicate with the introduction port 2 at the center of the rotating disk 5 without blocking the through hole 22.

A support shaft 24 is fixed to the other end of the screw figure 22. The screw figure 22 and the support shaft 24 are provided so that their axes coincide with the fineness of the filter cylinder 4. A rotary body 7 formed by a disk is fixed on the outer periphery of the support shaft 24, and a plurality of drainage holes formed by cups along the outer periphery are provided at the outer peripheral end of the rotary body 7 as shown in Fig. ttS3 (a). In addition, a rotary body 25 similarly formed by a disk is fixed on the outer periphery of the discharge tube portion 16b, and as shown in FIG. 3(d), the outer circumferential end of this rotary body 25 Attached to the section are a plurality of treated wastewater discharge containers 26 formed by cups along the outer periphery.

The filter #i4 provided with the rotating disk 5 is formed as described above, and the filter tube 4 is arranged inside the rotating disk 'Wjl with its ring direction substantially horizontal, and is provided on the partition plate 14. The support shaft 24 is freely rotated through the mechanical seal 28, and the tip of the support shaft 24 is pivotally supported by a bearing 30 on a screen 29 set up in a cushion [8, so that one end of the support shaft 24 is supported. The other end is supported by placing the part 16b on a semicircular bearing 31 formed at the upper end of the partition plate 15. A motor 32 is disposed in the rear part of the tank 13. The driving tooth $33 attached to the output shaft is the driven tooth #L2.
1 and the driven gear 2 as shown in FIG. 1(b) and FIG. 3(e).
1 so that the filtration @ 4 can be rotated in a vertical plane.

In the rotating disk type wastewater treatment device formed as described above, wastewater to be treated, such as domestic wastewater or organic factory wastewater, first flows into the cushion tank 1 through the introduction pipe 35. The wastewater flowing into the cushion tank 1 is screened for coarse suspended matter by a screen 29. The screen 29 is provided as necessary, and by providing the screen 29, coarse suspended matter can be prevented from being introduced into the filtration vi4. The coarse floating matter screened by the screen 291 remains in the cushion tank 1 for a long time and is reduced by being decomposed or crushed, but it is recommended to remove it by cleaning it once every few years. The lower part of the rotary body 7 is immersed under the water surface of the waste water that has passed through the screen 29, and as the rotor body 7, which is rotationally driven together with the filter tube 4, rotates, it goes under the water surface of the waste water. When the waste water is pumped up by the waste water introduction container 9, and when the waste water introduction container 9 comes to be located at the upper end of the rotating body 7 as the rotating body 7 rotates, the waste water in the waste water introduction container 9 is drained into the tray. 37 is injected and supplied.

The tray 37 is provided at the upper end of the partition plate 14,
The receiver is connected to the container 38 at the bottom of the tray 37, and the receiver surrounding the lower part of the figure 23 is connected to the container 38.
One end of 8 is open facing the inlet 2 of the filter cylinder 4. Therefore, the wastewater to be treated that has been put into the tray 37 in the wastewater introduction container 9 flows into the container 38, and is further sent by the screw figure 23 which is rotated integrally with the filter cylinder 4, and the wastewater is sent to the inlet port. 2 are introduced into the filter cylinder 4. Here, the amount of waste water in the cushion tank 8 fluctuates between the highest water level (HWL) and the lowest water level (LWL) in Figure 1 (,) depending on the inflow amount per hour, but the If the amount of wastewater introduced into the filter column 4 changes in response to changes in the amount of water, there is a risk that an amount of wastewater that exceeds the filtration capacity of the filter fil14 will be introduced into the filter fi4. In order to solve this problem, it is conceivable to collect the wastewater to be treated in a pump pit and introduce the wastewater from there quantitatively or semi-quantitatively into the filter tube 4 using a pump, but this would require a pump. Therefore, the overall configuration of the device becomes a little complicated, and in particular, in the device of the present invention, which includes a motor 32 for rotationally driving the filter cylinder 4, etc., it becomes small-scale if it is equipped with a pump etc. in addition to this motor 32, etc. Therefore, in the present invention, the wastewater is pumped up by the wastewater introduction container 9 and supplied to the filter tube 4. In other words, the filter!4 is rotated slowly at a constant rotation speed. A fixed amount of wastewater to be treated can be pumped up by a wastewater introduction container 9 provided on a rotary body 7 that rotates integrally with the filter cylinder 4, so that the wastewater can be pumped up in a fixed amount at a time regardless of the amount of water in the Cushion tank 1. The introduction container 9 is used to introduce a fixed amount of wastewater into the drainage part 4, and in this case, a quantitative or semi-quantitative supply of wastewater to the filter cylinder 4 is completed. It is possible to use the rotary drive of
Filtration fi by wastewater introduction container 9! The amount of wastewater supplied to the filter tube 4 is designed so that it does not exceed the filtration capacity of the filter tube 4, and that no backflow from the cushion tank 8 occurs in the introduction pipe 35 even when the maximum amount of wastewater flows into the cushion tank 8. It is set within the range that can be used.

The waste water introduced into the filter cylinder 4 is filtered 1i! The water-soluble components and colloidal components in the waste water are filtered by the filter medium 20 on the inner peripheral surface of the filter tube 4 , and the water-soluble components and colloidal components in the waste water pass through the filter medium 20 and pass through the small drainage holes of the porous cylinder 17 and the outer cylinder 16 to form the filter tube 4 . The waste water flowing out to the outer circumference of the tliaffr4 flows along the surface from the base fixed to the filter cylinder 4 of the rotation circle a5 to the outer circumference, and is stored in the lower part of the rotating disk tank 1. In this way, the wastewater comes into contact with the entire surface of the rotating disk 5 from its base to the outer periphery, and an aerobic microbial film is generated and grown over the entire surface of the rotating disk 5. . Therefore, the waste water flowing out from the filter cylinder 4 is transferred to the rotating disk 5.
As it flows along the water, it begins to be decomposed by microorganisms,
It is possible to increase the probability that the wastewater will come into contact with the microbial film on the surface of the rotating disk 5. The treated wastewater stored in the lower part of the rotating disk tank 1 is decomposed by the microbial film on the surface of the rotating disk 5, whose lower part is immersed under the water surface and is driven to rotate.

Here, the wastewater introduced into the filter cylinder 4 from the inlet 2 is filtered in large quantities in the portion close to the inlet 2 and passes through the filter cylinder 4, and the amount of water passing through the filtration gradually decreases as it moves away from the inlet 2. . Therefore, a large amount of wastewater is supplied to the rotating disk 5 at the starting end near the inlet 2 and flows on its surface, while the amount of wastewater supplied to the rotating disk 5 at the terminal end gradually decreases. It turns out. By distributing the wastewater in this way, the method of supplying the wastewater to the rotating disk 5 can be as shown in FIG. There is no risk of discharge from the plate tank 1, and the microorganism film on the surface of each rotating disk 5 can grow well by allowing the waste water containing nutrients to act on each rotating disk 5.

In addition, filtration residue, which is a floating component of the waste water, remains in the filter cylinder 4, and as the filter cylinder 4 rotates, it forms into lumps or rods, and the water contained therein is filtered and dehydrated, and the filter residue flows inside the filter cylinder 4 toward the discharge port 3. It moves and is discharged from the discharge port 3. The filtration residue discharged from the discharge port 3 is placed in a residue receiver provided in the residue storage tank 27!
! ! 39 is accepted and stored. In this way, suspended components in the wastewater are removed as filter residue by the rotating filter cylinder 4 before flowing into the rotating disk tank 1, and are then automatically discharged from the discharge port 3 of the filter cylinder 4. Unlike the sedimentation separation method, there is no need to use a device for removing sediment using a tank with a long residence time, and floating components can be removed efficiently. In addition, the degree of removal of floating components is determined by the structure and surface area of filtration@4 at W491. It can be easily set up by
Residues remaining after filtration in the filter tube 4 tend to combine with each other to form ball-shaped lumps or rods, and the filter cloth or wire mesh, which is the material constituting the filter medium 20 on the inner surface of the filter tube 4, combines with each other. Since the affinity between filtration residues is greater than the affinity with plastic closed-cell foam, the inner surface of the filter medium 20 is cleaned by the filtration residues, and therefore the 11-pass cylinder 4 is long. It is possible to maintain a 1g excess capacity without washing for a period of time. Of course, a device for cleaning the filter surface of the filter tube 4 by spraying water may be attached as necessary.

By rotating the filter cylinder 4 and the rotating disk 5 together as described above, the filter cylinder 4 removes suspended solids from the wastewater, and the microorganism film on the surface of the rotating disk 5 removes the waste water. The wastewater is treated by aerobic biological treatment to decompose and remove organic water-soluble substances and some colloidal substances, but if the rotational speed of the filter cylinder 4 and rotating disk 5 is high, The force may make it easier for fine suspended solids in the wastewater to pass through the filter tube 4 or cause the filter medium 20 to become clogged, and it may also become difficult for microbial membranes to adhere to the rotating disk 5 or the attached microorganisms may The membrane rotates on a rotating disk 5 due to centrifugal force and contact resistance with water.
From Njflt, it becomes easier. Therefore, the rotational speed of the filter cylinder 4 and the rotating disk 5 is 1 to 3 at the circumferential speed of the filter cylinder 4.
It is appropriate to set the circumferential speed of the rotating disk 5 to 5 to 15 m/min.As in the embodiment shown in FIG. When used, it is preferable to set the rotational speed so that each rotating disk 5 falls within this speed range. Moreover, since it is appropriate that the circumferential speed of the filter cylinder 4 is set smaller than the circumferential speed of the rotating disk 5, a rotating circle @ 5 is formed on the outer periphery of the m-recessed part 4.
The configuration of the present invention in which filtration@4 and rotating disk 5
It is easy to design the circumferential speed of each to fall within the above range, and this can be said to be a reasonable configuration. Especially the filtration! ! 4 tends to be able to perform clean filtration without straining when the diameter is small, so the form of the present invention in which the LTM cylinder 4 is formed as a thick rotation axis of the rotating disk 5 is reasonable. Eil. In addition, in this way, the filter cylinder 4 for filtering and removing suspended solids from the waste water is formed by the rotating disk 5.
Since the filter tube 4 is configured to be incorporated in place of the rotating shaft of the filter tube 4, the filter tube 4 can be incorporated extremely compactly, and the space of the entire device can be made small.

In the rotating disk method in which wastewater is treated as described above, microorganisms may proliferate on the surface of the rotating disk 5.
Moreover, this peels off irregularly or becomes sludge-like, and is mixed into the waste water of the rotating disk tank 1 as sludge. This sludge has relatively larger particles than surplus activated sludge and settles easily, and can be filtered. As shown in FIG. 1(, ), the bottom of the rotating disk tank 1 is formed by an inclined floor plate 40 that slopes downward along the slope of the outer circumference of each rotating disk 5. Coarse sludge mixed into the waste water of No. 1 settles and accumulates in the waste water below near the tip of the filter tube 4 along the inclined floor plate 40. In this part, a wastewater supply container 6 attached to the rotating disk 5 at the starting end is arranged so as to be submerged under the water surface of the wastewater as the rotating disk 5 rotates, and as the rotating disk 5 rotates, the water surface increases. The waste water containing sludge is pumped up by the waste water supply container 6 which goes below. Furthermore, when this wastewater supply container 6 comes to be located at the upper end of the rotating disk 5 as the rotating disk 5 rotates, the wastewater containing sludge in the wastewater supply container 6 is thrown into the tray 41. Ru.

The tray 41 communicates with the tray 37, and the tray 41 communicates with the tray 37.
The wastewater containing sludge introduced into the filter 1 flows from the receiving tray 37 into the receiving container 38, is further fed by the screw feeder 23, and is introduced into the filtration 1i2I4 from the inlet 2. In this way, the sludge is introduced into the filter cylinder 4, filtered, remains in the filter cylinder 4 as a filter residue, and is discharged from the discharge port 3 of the filter cylinder 4 into the residue receiver 39. here,
Conventionally, the sludge is separated from treated wastewater by sedimentation, and the precipitated sludge is filtered and concentrated using a rotary filter tube, etc. However, when sludge is filtered alone, it is difficult to dewater it because it is muddy. On the other hand, by introducing the sludge into the filter tube 4 together with the waste water from the cushion tank 8 as in the present invention, this sludge is mixed with the suspended solids in the untreated wastewater introduced from the cushion tank 8, and the sludge is filtered. Inside the cylinder 4, the water becomes lump-like or rod-like, allowing dehydration to proceed easily.

The sludge can be supplied to the filter tube 4 by directly utilizing the rotation of the rotating disk 5 that is integrated with the filtration tube 4, and there is no need to separately install a pump or the like, and there is no need to introduce waste water. The amount of waste water introduced into the filter 14 by the container 9 and the amount of waste water containing sludge introduced into the filter cylinder 4 by the waste water supply container 6 does not exceed the filtration capacity of the filter cylinder 4. The number of supply containers 6 is set to be smaller than the number of waste water introduction containers 9.

The wastewater that has undergone aerobic treatment in the rotating disk tank 1 as described above is transported to flow weir 42
The waste water flows over the upper end of the drain weir 42 and into the waste water storage tank 36 formed between the overflow weir 42 and the partition plate 15. Drainage tank 36
In this case, a treated wastewater discharge container 26 attached to the rotating body 25 is arranged so as to go under the water surface of the wastewater as the rotating body 25 rotates, and a treated wastewater discharge container 26 attached to the rotating body 25 is arranged so as to go under the water surface of the wastewater as the rotating body 25 rotates. The treated wastewater is pumped up by the wastewater discharge container 26. Furthermore, when the treated wastewater discharge container 26 comes to be located at the upper end of the rotary body 25 as the rotary body 25 rotates, the wastewater in the treated wastewater discharge container 26 is thrown into the tray 43. . The wastewater put into the receiving tray 43 flows into a disinfection tank 45 equipped with a packed tower 44 filled with high-grade bleaching powder, etc. After being disinfected here, the treated wastewater is discharged out of the device through a drain pipe 46. Ru.

In the above figures 1 to 3, 47, 48, 49 are inspection ports, and 50, 51.52 are respective inspection ports 47148.
．． 49, and the residue receptacle is the inspection lid 52, which can be removed from the inspection opening 53 by opening the inspection lid 52.
You can take it out by holding 3. Further, 54 is an air hole for supplying fresh air to the rotating disk tank 1. The wastewater treatment device shown in the above embodiment is mainly used as a device for personal residences to treat domestic wastewater, but the present invention is of course not limited to this embodiment, and the filter cylinder 4 and rotating circle are The present invention can be implemented using a basic form configured by combining the plate 5 and the plate 5 as shown in the following specific example 1.

Next, the present invention will be specifically explained with respect to its major bone device.

A wastewater treatment device is formed using a combination of a filter cylinder 4 and a rotary disk 5, and a general wastewater (BOD) of a tofu manufacturing factory discharges approximately 50 m' of wastewater per day.

Both COD and suspended solids (containing 500 mg/l) were treated. *Effluent from various processes at the factory is received in a raw water IIL tank with a capacity of about 100 cm, from which it is placed in a circulating disk tank 1 using a pump with a lifting capacity of 0.6 m cm/min. It was fed into the filter cylinder 4. This filter cylinder 4 has an outer diameter of 0.4 m, a length of about 5 II, and an effective filtration area of about 6°3 m2.
Its rotation speed is 3 rpm. Further, the rotating disks 5 attached to the filter tube 4 are made of foamed plastic with a diameter of about 21I and a thickness of 2C, and 100 disks are attached in a range of 51I with a clearance of 3C rings between the rotating disks 5. Ru.

The immersion surface of the rotating disk 5 is about 0.75 m from the outer circumference to the water surface, and the wetted area is about 3II2 for each rotating disk 5, so the total wetted area of the rotating disk 5 is about 300 m''. The BOD fed into the tt passage tube is 25 per day.
kg, 70% of the suspended solids will be removed by the filter cylinder 4, and the BOD loaded in the rotating disk tank 1 will be
is 7.5 kg per day. Therefore, the daily BOD load per 1 m'' of the liquid contact surface IIti of the rotating disk 5 is 25 g.
becomes. By the processing by this rotating disk 5, BOD5C
0D is removed by about 95% to 25 ml/l, and suspended solids are removed by about 90% to 50 mg/l. Next to the rotating disk tank 1 is a settling tank with a retention time of 2.5 hours and an actual volume of approximately 5.2 m3, and the settled sludge in the settling tank is pumped through the communication pipe at a timely rate of 1 lll of the above raw water! It will be returned to the tank. lt passing ilI4 is about 30k per day
g of sludge (75% water content) is discharged.

The equipment shown in Figures 1 to 4 is installed in a single-family house, and domestic wastewater of approximately 11I3 (flush toilet sewage and gray water; BOD, COD, and suspended solids are all approximately 200 mg/
1) were processed. Domestic wastewater has a volume of 0.3 as shown in the figure.
75+a" (average residence time 9 hours). Eight wastewater introduction containers 9 with a capacity Mi200+1 are attached to the rotating body 7 in this cushion tank 8. The wastewater pumped from the cushion tank 8 is introduced into the filter cylinder 4 provided in the rotating disk tank 1. The filter tube 4 is formed by stretching a polyester resin filter medium 20 into a cylindrical shape, and this filter medium 20 is supported by a perforated cylinder 17 made of a porous plastic cylinder, and punch holes are provided on the outer periphery of the filter cylinder 4. The filter tube 4 is reinforced with an outer cylinder 16 made of stainless steel and has an inner diameter of 20 cm, a length of about 50 cm, and an outer diameter of 30 cm, and has a filtration area of 0.314 m2. The attached rotating disk 5 is formed such that the closer to the inlet 2 of the filter tube 4 the diameter is larger and the closer to the outlet 3 the smaller the diameter, and the largest one has a diameter of 7.
5cm%The smallest one has a diameter of 55cm, and the average diameter is 65cm.
cm. The rotating disk 5 is made of foamed plastic with a thickness of about 1 cIIl, and is fixed to the outer periphery of the filter tube 4 so that 12 disks are lined up with a clearance of about 30 I around the rotating disk 5. The area in contact with the drainage water is approximately 0.52 m2 per sheet, so the total area in contact with the liquid is approximately 6.
, 3 ta''. Four wastewater supply containers 6 with a volume of 100 mf are attached to the outer periphery of the rotary disk 5 closest to the inlet 2, and the sludge separated from the rotary disk 5 by IM is collected. This waste water supply container 6 pumps up the waste water together with the waste water in the rotary disk tank 1 and supplies it to the filter tube 4 so that it can be filtered again. The water overflows and flows into the waste water storage tank 36.

In this wastewater collection tank 36, eight treated wastewater discharge containers 26 having a volume of 200 W+1 are attached to the rotating body 25, and the treated wastewater is pumped up to the disinfection tank 45. The treated wastewater that has flowed into the disinfection tank 45 is disinfected with high-grade bleaching powder and then discharged. The BOD fed into this device per day is about 200g, and 50% of it is removed together with suspended substances by the filter cylinder 4, so the BOD loaded into the rotating disk tank 1 is about 100g per day.
It is. Therefore, the daily BOD load per wheel 2 in the contact area of the rotating disk 5 is approximately 16. bawl. By this treatment using the rotating disk 5, approximately 90% of both BOD and C0D are removed, resulting in a concentration of 20 wg/1. Also, approximately 2 filters per day from 4 filter cylinders.
00 g of residual sludge (75% moisture) is discharged, and a volumetric residual liquid amount of 201 is stored in the basket 39. The amount of residual liquid causes aerobic compost fermentation in the basket 39, and as water evaporates, organic matter is also decomposed, and it is only necessary to pull it out and dispose of it about once every six months. This material can also be effectively used as compost.

[Effects of the Invention] As described above, the first aspect of the present invention is a rotary disk tank which is arranged above the water surface in a rotating disk tank so as to be freely rotatable with its axial direction facing sideways, and one end of which is an inlet for introducing waste water. A filter cylinder which is opened as a mouth and whose other end is opened as a discharge port for discharging filtered residue in waste water filtered through a peripheral wall into a rotating disk tank, and parallel to the outer periphery of the filter cylinder along its axial direction. Since it is equipped with a plurality of rotating disks attached to the tank and the lower part of which is immersed under the water surface, the wastewater is supplied to the rotating disk tank after being filtered through the filter cylinder. The suspended solids in the waste water inside the filter cylinder remain as filtration residue and are discharged, and the suspended solids can be easily and efficiently removed without the need for steps such as sedimentation separation. Moreover, the filter cylinder is incorporated into the device as the rotation axis of the rotating disk,
This eliminates the need to provide a tank for sedimentation separation, and allows the device to be easily constructed. In addition, the wastewater introduced into the filter tube passes through the peripheral wall of the filter, flows along the surface of the rotating disk, and advects into the rotating disk tank, wetting the entire surface of the rotating disk.
A microbial film can be generated on the entire surface of the C rotating disk,
Therefore, the microbial film on the entire surface of the rotating disc can be applied to the wastewater flowing out from the filter cylinder, increasing the probability of contact between the wastewater and the microbial film on the surface of the rotating disc, increasing wastewater treatment efficiency. It is something that can improve. In addition, a large amount of the waste water introduced into the filter cylinder is filtered through the peripheral wall near the inlet, and as it moves away from the inlet! The amount of wastewater passing through the system gradually decreases, and a large amount of wastewater is supplied to the rotating disk at the starting end near the inlet, while the amount of wastewater supplied to the rotating disk at the end gradually decreases. This eliminates the risk of wastewater that has not been sufficiently treated being discharged from the rotating disk tank due to a short circuit, and allows the wastewater to act on each rotating disk to form a microbial film on the surface of each rotating disk. It is possible to improve the quality of raw H.

In addition to the first invention, the second invention of the present invention provides a filter tube which is attached to the outer peripheral end of the rotating disk and pumps up the treated wastewater in the rotating disk tank as the rotating disk rotates. Since the system is equipped with a wastewater supply container that supplies water to the inlet of the rotary disk, the sludge caused by the microbial film that has peeled off from the surface of the rotating disk is supplied to the filter cylinder by the wastewater supply container, and is left as residue in the filter cylinder before being discharged. The sludge can be removed easily and efficiently without the need for steps such as sedimentation separation, and the return supply of sludge to the filtration tube is carried out by rotating integrally with the filtration tube. The rotation of the rotating disk can be used as is, and there is no need to separately install a pump or the like (there is no risk that the device will become large-scale).

Furthermore, in addition to the first invention, a third invention of the present invention provides that, in addition to the first invention, the drainage in the cushion tank, which is attached to the outer peripheral end of the rotating body that is rotationally driven integrally with the filter cylinder and into which the waste water is introduced, is removed by the rotation of the rotating body. Pump it up with the t! ! Since it is equipped with a wastewater introduction container that supplies water to the filter tube, the wastewater introduction container quantitatively releases water into the filter tube as the rotating body rotates at a constant speed integrally with the filter tube. can be introduced, and even if there is a fluctuation in the amount of wastewater flowing into the cushion tank, a constant amount of wastewater can be supplied to the filter cylinder without exceeding the filtering capacity of the filter cylinder. Yes, and in this way, when supplying waste water to the filter tube, the rotation of the rotating body that is rotated together with the filter tube can be done directly using the soil blade, and a pump etc. is separately installed. This eliminates the need for a complicated device configuration.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are a front sectional view and a plan sectional view of an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIGS. 3(a) and 3(b).
)(c)(d)(e) are lines A-A and B in Figure 2, respectively.
-B#a, C-C line, D-Di, E-E line Teno Tllf
Figure 4 is an enlarged sectional view of a part of the same as above, and Figure 5 is a schematic diagram of each method of drain supply in the rotating disk method. 1 is a rotating circle. plate, 2 is the inlet, 3 is the outlet, 4 is the filter cylinder,
5 is a rotating disk, 6 is a wastewater supply container, 7 is a rotating body, 8 is a bush covering tank, and 9 is a wastewater introduction container.

Claims (3)

[Claims] (1) The rotary disk tank is arranged above the water surface in the rotating disk tank so that it can be freely rotated with the axial direction facing sideways, and one end is opened as an inlet for introducing waste water, and the other end is passed through the peripheral wall of the rotating disk tank. A filter tube that is opened as an outlet for discharging filter residue in wastewater filtered inside, and a rotating circle that is attached to the outer periphery of the filter tube in parallel along the ring direction and whose lower part is immersed under the water surface. A rotating disk type wastewater treatment device comprising: a plate; (2) The rotary disk tank is arranged above the water surface in the rotating disk tank so that it can be freely rotated with the axial direction facing sideways, and one end is opened as an inlet for introducing waste water, and the other end is passed through the peripheral wall of the rotating disk tank. A filter tube that is closed as an outlet for discharging the filter residue in the wastewater filtered inside, and a rotating circle that is attached to the outer circumference of the filter tube in parallel along the axial direction and whose lower part is immersed under the water surface. A plate, and a wastewater supply container attached to the outer peripheral end of the rotating disk, which draws up the wastewater in the rotating disk tank as the rotating disk rotates and supplies it to the inlet of the filter cylinder. A rotating disc type wastewater treatment device with special features. (3) The rotary disk tank is arranged above the water surface in the rotating disk tank so that it can be freely rotated with the axial direction facing sideways, and one end is opened as an inlet for introducing waste water, and the other end is passed through the peripheral wall of the rotating disk tank. A filter tube has an opening as an outlet for discharging the filtered residue in the wastewater filtered inside, and a rotating circle that is attached to the outer circumference of the filter tube in parallel along the axial direction and whose lower part is immersed under the water surface. Drainage water that is attached to the outer peripheral end of a rotating body that is driven to rotate integrally with the plate and filter cylinder, and into which wastewater is introduced, pumps up the wastewater in the cushion tank as the rotary body rotates, and supplies it to the inlet of the filter cylinder. A rotating disk type wastewater treatment device comprising: an introduction container;