JP2020001040A - Water treatment apparatus - Google Patents

Abstract

To provide a water treatment apparatus that promotes efficient flow of water to be treated.SOLUTION: A sedimentation separation tank 120 and a cleaning port 130 are disposed in a treatment tank body 101 of a water treatment apparatus 100 and communicate with each other at the bottom in the vertical direction of the tank. The cleaning port 130 is disposed distantly from a side walls 101a and 101b of the treatment tank body 101 and thus communicates with the sedimentation separation tank 120, related to the lateral direction and longitudinal direction of the tank.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water treatment device for treating wastewater such as domestic wastewater.

  Japanese Patent Laying-Open No. 2008-012465 discloses a water treatment apparatus. This water treatment apparatus has a solid-liquid separation tank that has a sludge separation function while sewage flows in from the outside, and an aerobic digestion tank that communicates with the solid-liquid separation tank at the lower part of the tank. In the aerobic digestion tank, the sewage transferred from the solid-liquid separation tank through the lower part of the tank is subjected to aerobic treatment, and the aerobic treated water to be treated is then returned to the solid-liquid separation tank.

JP 2008-012465 A

  In the above water treatment apparatus, sewage flows between the solid-liquid separation tank and the aerobic digestion tank at the lower part of the tank, and the sewage is treated in each tank. In the treatment of such sewage, the sewage needs to be efficiently circulated, and there is room for further improvement in the configuration of the water treatment apparatus described above. The present invention has been made in view of this point, and it is an object of the present invention to provide a technique for promoting efficient distribution of water to be treated.

  The above object is achieved by the present invention. According to a preferred embodiment of the water treatment apparatus according to the present invention, a water treatment apparatus including a water treatment tank that performs treatment on water to be treated including sludge is configured. This water treatment apparatus has a tank body, a settling tank, a vertical hole, and an air supply unit. The tank body is a tank-shaped member having an outer wall that forms an outer shell of the water treatment device. Inside the tank body, tanks for treating the water to be treated are provided as water treatment areas. Specifically, it has a sedimentation tank for sedimenting the sludge contained in the water to be treated, and a vertical hole communicating with the bottom of the sedimentation tank and through which the water to be treated in the sedimentation tank can flow. Further, the water treatment apparatus has an intake air supply unit capable of supplying air to the vertical hole. Preferably, the upward flow is generated when the air supplied from the air supply unit rises in the water to be treated, and the downward flow is generated according to the upward flow, so that the swirling flow is generated in the vertical hole. Is generated. Since the water to be treated in the vertical hole is stirred by the swirling flow, the vertical hole is also referred to as a stirring hole. This vertical hole is arranged apart from the outer wall of the tank body. The vertical hole is configured as a region defined by a predetermined partition wall extending vertically in the tank body. That is, the vertical hole is defined as a region having a predetermined length extending in the vertical direction. Typically, the partition wall is spaced apart from the side wall of the tank body and separated from the bottom of the tank body, whereby the sedimentation tank and the vertical hole communicate at the bottom of the tank body. More preferably, the water to be treated is configured to flow into the sedimentation tank from outside the water treatment apparatus, and the vertical hole is configured so that the water to be treated is transferred through the bottom region of the sedimentation tank. .

  According to the present invention, since the vertical hole is arranged apart from the outer wall of the tank body, the sedimentation tank can be arranged around the vertical hole. Therefore, in the sedimentation tank and the vertical hole communicating with each other at the bottom of the tank body, communication between the sedimentation tank and the vertical hole can be achieved in a plurality of directions (for example, the front-back direction and the left-right direction of the tank body). Thereby, the circulation (exchange) of the sludge together with the water to be treated is efficiently performed between the sedimentation tank and the vertical hole.

  According to the water treatment apparatus of the present invention, the vertical hole is provided with the mesh filter medium extending in the vertical direction. And it is comprised so that the air supplied from the air supply part may pass through a mesh filter medium, and may be fragmented. Preferably, the mesh filter medium is formed in a cylindrical shape, and the air supply unit is configured such that the air supply pipe passes through the inside of the mesh filter medium to a lower region of the vertical hole. Further, the vertical hole is constituted by a mesh filter medium disposition area provided with a mesh filter medium and a mesh filter medium non-disposition area other than the mesh filter medium disposition area. The mesh filter medium arrangement region is provided above the air diffuser of the air supply unit. That is, the mesh filter medium is provided above the air diffuser. Then, the air supplied from the air supply unit generates an upward flow in the mesh filter medium disposition area, and generates a downward flow in the mesh filter medium non-disposition area. As a result, a swirling flow is generated in the vertical hole. Accordingly, the inside of the vertical hole is stirred by the air, and the sludge swirling by the swirling flow in the vertical hole is aerobicly treated by the fragmented air (bubbles). The swirling flow is configured so as to form a deposited sludge circulation means for circulating the deposited sludge in the settling tank together with the water to be treated in the vertical hole.

In addition, it is preferable that the mesh filter medium disposition area and the mesh filter medium non-disposition area are provided adjacent to each other.

  According to a further embodiment of the water treatment apparatus according to the present invention, the tank body has a first outer wall and a second outer wall parallel to each other. And the vertical hole is arrange | positioned in the width direction of the tank main body orthogonal to the 1st outer wall and the 2nd outer wall, in the area | region including the center area of the width direction of a tank main body. Therefore, the sedimentation tank is provided on the first outer wall side and the second outer wall side of the vertical hole in the width direction of the tank body. Therefore, the sedimentation tank and the vertical hole communicate with each other on the first outer wall side and the second outer wall side of the vertical hole. Preferably, the vertical hole is formed by an area symmetrical with respect to an imaginary plane passing through the center in the width direction of the tank main body and parallel to the first outer wall and the second outer wall.

  According to a further aspect of the water treatment apparatus according to the present invention, a treatment tank for performing aerobic treatment or anaerobic treatment of the water to be treated is provided downstream of the sedimentation tank in the tank body. In addition, an aerobic treatment tank and / or an anaerobic treatment tank are provided as the treatment tank. Further, a processing tank other than the aerobic processing tank and the anaerobic processing tank may be further provided. In the configuration in which the aerobic treatment tank and the anaerobic treatment tank are provided, it is preferable that the anaerobic treatment tank is on the upstream side and the aerobic treatment tank is on the downstream side. The tank body is provided with a partition wall for partitioning the sedimentation tank and the processing tank, and a vertical hole forming wall portion for forming a vertical hole is attached to the partition wall. Typically, the water treatment apparatus configures each water treatment area by attaching a partition to a tank-shaped tank body. Therefore, it is preferable that an assembly body in which the partition wall and the vertical hole forming wall portion are integrated in advance is configured, and that the assembly body be attached to the tank body. In this case, a vertical hole is provided at the same time when the partition is assembled. Therefore, the manufacturing process of the water treatment device can be simplified.

  According to a further aspect of the water treatment apparatus according to the present invention, a circulating mechanism is provided for transferring the water to be treated in the treatment tank to the sedimentation tank and circulating the water to be treated between the sedimentation tank and the treatment tank. . A pump that returns the water to be treated in the treatment tank to the settling tank is preferably used as the circulation mechanism. More preferably, an air lift pump is used in which the head varies according to the level of the water to be treated in the water treatment tank, so that the transfer amount of the water to be treated is variable.

  According to a further aspect of the water treatment apparatus according to the present invention, two advection openings for advancing the water to be treated from the sedimentation tank to the treatment tank are formed in the partition wall with the vertical hole interposed therebetween. Therefore, even if the stirring tank is provided in the central area, the water to be treated can be transferred through the two transfer openings. As a result, the water to be treated is efficiently transferred from the sedimentation tank to the treatment tank.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which promotes the efficient distribution of the to-be-processed water in a water treatment apparatus is provided.

It is a figure showing the outline of the water treatment equipment concerning a typical embodiment of the present invention. It is a figure which shows the treatment flow of the to-be-processed water in a water treatment apparatus. It is a top view of the water treatment apparatus in the III-III line of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a sectional view taken along line V-V in FIG. 3. FIG. 6 is a sectional view taken along line VI-VI of FIG. 3.

  Hereinafter, the configuration of a water treatment apparatus according to a representative embodiment of the present invention will be described with reference to FIGS. The present embodiment describes a water treatment apparatus that receives and treats raw water (also referred to as “drainage” or “water to be treated”) discharged from a general home, an apartment house, or the like in a water treatment area.

  As shown in FIG. 1, the water treatment device 100 has a tank-shaped treatment tank main body 101 that forms a frame (outer shell) of the water treatment device 100. As shown in FIGS. 1 and 2, the processing tank main body 101 is formed in a substantially rectangular shape in plan view, and has parallel side walls 101a and 101b, mutually parallel side walls 101c and 101d, a bottom wall 101e and an upper wall. 101f. The water treatment device 100 is a water treatment device configured to treat domestic wastewater (living wastewater) together with human waste. The processing tank body 101 is an example of an embodiment corresponding to the “tank body” in the present invention.

  As shown in FIG. 1, the processing tank main body 101 includes an inflow pipe 102, an outflow pipe 103, and a manhole 104. The inflow pipe 102 is configured as an opening for introducing the water to be treated (raw water) into the internal space of the treatment tank main body 101. The outflow pipe 103 is configured as an opening for drawing out the treated water from the internal space of the treatment tank main body 101. The manhole part 104 is configured as a part in which manholes for entering the tank, for inspecting the inside, and for cleaning are formed.

  In addition, the manhole 104 side (upper wall 101f side) of the processing tank body 101 is defined as the tank upper or tank upper part, and the opposite side (bottom wall 101e side) is defined as the tank lower part, tank lower part or tank bottom part. You. The inflow pipe 102 side (the side wall 101c side) of the processing tank main body 101 is defined as the upstream side, and the outflow pipe 103 side (the side wall 101d side) is defined as the downstream side. In FIG. 1, the direction along the extending surface of the manhole 104 is defined as a horizontal direction (also referred to as a tank front-rear direction), and a direction intersecting the horizontal direction is defined as a vertical direction (also referred to as a tank vertical direction). You. The direction perpendicular to the paper surface of FIG. 1 (the direction perpendicular to the tank longitudinal direction and the tank vertical direction, the vertical direction in FIG. 3) is defined as the tank lateral direction. The arrows in FIGS. 1 to 6 indicate the flow of the water to be treated.

  As shown in FIG. 1, a water treatment area in which predetermined water treatment is performed while storing raw water received through the inflow pipe 102 is formed in the internal space of the treatment tank main body 101. In this water treatment area, a sedimentation separation tank 120, a cleaning hole 130, an anaerobic treatment tank 140, an aerobic treatment tank 150, a treatment water tank 160, and a disinfection tank 170 are formed. As shown in FIG. 2, the wastewater flowing into the treatment tank main body 101 (inflow baffle 110) through the inflow pipe 102 is transferred to the sedimentation separation tank 120, the anaerobic treatment tank 140, the aerobic treatment tank 150, the treatment water tank 160, and the disinfection tank 170. The water is sequentially buried, and the treated water flows out of the processing tank body 101 through the outflow pipe 103. Further, between the sedimentation separation tank 120 and the cleaning hole 130 and between the anaerobic treatment tank 140 and the aerobic treatment tank 150, the water to be treated is circulated. In addition, the water treatment apparatus 100 may be configured as a purification tank that discharges the water that has flowed out of the treatment tank main body 101 as it is, or the water that has flowed out of the treatment tank main body 101 may be used as toilet or water for sprinkling. It may be configured as a water reuse device for reuse.

  The inflow baffle 110 constitutes the most upstream area of the water treatment area. The wastewater that has flowed into the inflow baffle 110 from the inflow pipe 102 is transferred to the sedimentation separation tank 120. The water to be treated that has flowed into the sedimentation separation tank 120 is subjected to solid-liquid separation treatment, and the solid component separated from the water to be treated is deposited on the bottom of the sedimentation separation tank 120 as settled sludge. When the wastewater flows into the inflow baffle 110, the wastewater flows indirectly into the sedimentation separation tank 120, and the agitation of the settled sludge in the sedimentation separation tank 120 is suppressed. The sedimentation separation tank 120 provided with the inflow baffle 110 is an example of an embodiment corresponding to the “sedimentation tank” in the present invention.

  As shown in FIG. 1 and FIG. 3, a partition 105 extending in the vertical direction of the tank is provided between the sedimentation separation tank 120 and the anaerobic treatment tank 140 on the downstream side thereof. The partition 105 is attached to the side walls 101a and 101b and the bottom wall 101e. As shown in FIG. 4, left and right openings 105 a and 105 b communicating with the sedimentation separation tank 120 and the anaerobic treatment tank 140 are formed in an upper region of the partition wall 105. As shown in FIGS. 3 and 4, a partition wall 131 for partitioning the sedimentation separation tank 120 and the cleaning hole 130 is attached to the partition wall 105. The partition wall 131 is provided apart from the side walls 101a and 101b in the tank left-right direction, and is provided apart from the side walls 101c and 101d in the tank front-back direction. With this partition wall 131, the cleaning hole 130 is set corresponding to the central region of the partition wall 105 in the tank left-right direction. That is, the cleaning hole 130 includes a central portion of the processing tank main body 101 in the horizontal direction of the tank, and has a symmetrical shape with respect to the central portion as shown in FIG. In other words, the cleaning hole 130 is formed symmetrically with respect to an imaginary plane passing through the center of the processing tank main body 101 in the tank left-right direction and extending in the tank front-rear direction. The openings 105a and 105b are provided on the left and right of the cleaning hole 130 with respect to the cleaning hole 130, respectively. The partition wall 105 and the partition wall 131 are examples of the embodiment corresponding to the “partition wall” and the “vertical hole forming wall portion” in the present invention, respectively. Further, the cleaning hole 130 is an example of an embodiment corresponding to the “vertical hole” in the present invention. Further, the opening portions 105a and 105b are an example of the embodiment corresponding to the "convection opening" in the present invention. Moreover, the side wall 101a, 101b is an example of an embodiment corresponding to the "1st outer wall" and the "2nd outer wall" in this invention, respectively.

As shown in FIGS. 1 and 4, the lower end of the partition wall 131 is arranged so as to be separated from the bottom (bottom wall 101 e) of the processing tank main body 101, whereby the lower region of the precipitation separation tank 120 is It communicates with the cleaning hole 130. That is, the lower end of the partition wall 131 is formed as a lower end opening 130a of the cleaning hole 130, and the lower end opening 130a is formed so as to be separated upward from the bottom wall 101e. The upper end opening 130b of the cleaning hole 130 at the upper end of the partition wall 131 is formed so as to be separated downward from the upper wall 101f. The cleaning hole 130 is provided with a long and mesh-like filter medium 132 formed as a draft tube and a first air diffusion pipe 190 penetrating the filter medium 132. As shown in FIG. 4, the first air diffuser 190 is disposed in a region on the right side of the cleaning hole 130. The area on the right side of the cleaning hole 130 is an example of an embodiment corresponding to the “mesh filter medium arrangement area” in the present invention. Therefore, the area on the left side of the cleaning hole 130 where the filter medium is not arranged is an example of an embodiment corresponding to the “ mesh filter medium non-arranged area” in the present invention. When air is supplied from the lower end of the first diffuser pipe 190 into the cleaning hole 130 through the lower end opening 130a, an upward flow is generated in the right area of the cleaning hole 130, and the left area of the cleaning hole 130 is generated. Generates a downward flow. Thereby, a swirling flow is generated in the cleaning hole 130, and the water to be treated in the cleaning hole 130 is stirred. Therefore, the cleaning hole 130 is also referred to as a stirring hole for stirring the water to be treated. The filter medium 132 is an example of an embodiment corresponding to the “filter medium” in the present invention. In addition, the first air diffuser 190 is an example of an embodiment corresponding to the “air supply unit” in the present invention.

  The air diffused from the first air diffuser 190 passes through the filter medium 132 and is subdivided. The sludge deposited on the bottom of the sedimentation separation tank 120 is circulated in the cleaning hole 130 together with the water to be treated by a swirling flow (upflow and downflow). In the cleaning hole 130, the sludge is efficiently aerobic treated by the fragmented air. Due to the fluctuation of the water level in the water treatment area, the sludge inside the cleaning hole 130 and the sludge at the bottom of the sedimentation separation tank 120 come and go, whereby the sludge containing bubbles is supplied into the sedimentation separation tank 120. As a result, in the sedimentation separation tank 120, the sludge containing air bubbles floats and turns into scum, and the sludge is stored at a high concentration.

  As shown in FIG. 3, the water to be treated in the sedimentation separation tank 120 is transferred to the downstream anaerobic treatment tank 140 through the left and right openings 105a and 105b.

  As shown in FIGS. 1, 3 and 5, the anaerobic treatment tank 140 includes a first anaerobic chamber 141 and a second anaerobic chamber 142. Between the anaerobic treatment tank 140 and the aerobic treatment chamber 150 on the downstream side, a partition 106 extending in the tank vertical direction is provided. As shown in FIG. 3, a partition wall 143 for partitioning the first anaerobic chamber 141 and the second anaerobic chamber 142 is attached to the front side (upstream side) of the partition wall 106. With this partition wall 143, the second anaerobic chamber 142 is set corresponding to the central region of the partition wall 106 in the tank left-right direction. As shown in FIG. 5, the lower end of the partition wall 143 is disposed so as to be separated from the bottom of the processing tank main body 101, whereby the area below the first anaerobic chamber 141 communicates with the second anaerobic chamber 142. are doing.

  As shown in FIG. 3, a partition wall 161 for partitioning a downstream region of the partition 106 into an aerobic treatment tank 150 and a treatment water tank 160 is attached to the rear side (downstream side) of the partition 106. I have. The length of the second anaerobic chamber 142 defined by the partition wall 143 in the horizontal direction of the tank is set to be longer than the length of the treatment water tank 160 defined by the partition wall 161 in the horizontal direction of the tank. As a result, as shown in FIGS. 3, 5 and 6, the partition wall 106 is outside the partition wall 161 (outside the treatment water tank 160) and inside the partition wall 143 (the second Inside the anaerobic chamber 142), left and right openings 106a and 106b communicating the second anaerobic chamber 142 and the aerobic treatment tank 150 are provided.

  The partition wall 106 is assembled to the processing tank main body 101 with the partition wall 143 and the partition wall 161 attached to the partition wall 106 in advance. That is, the partition 106, the partition wall 143, and the partition wall 161 are configured as an assembly. Thereby, in the manufacturing process of the water treatment apparatus 100, the second anaerobic chamber 142, the aerobic treatment tank 150, and the treated water tank 160 are installed efficiently and simply.

  An anaerobic filter bed 144 filled with a predetermined amount of anaerobic filter medium to which anaerobic microorganisms that anaerobically treat organic pollutants adhere is supported by the treatment tank main body 101 in an intermediate region of the first anaerobic chamber 141 in the vertical direction of the tank. It is provided so that. As the anaerobic filter material, a flat filter material or a skeleton-like spherical filter material can be suitably used. In the anaerobic filter bed 144, the water to be treated is subjected to an anaerobic treatment and a filtering treatment, whereby the BOD is reduced and the sludge is removed.

  The water to be treated subjected to the anaerobic treatment in the first anaerobic chamber 141 is transferred from the area below the first anaerobic chamber 141 to the area below the second anaerobic chamber 142, and rises in the second anaerobic chamber 142. Thereafter, the water to be treated passes through the openings 106a and 106b and is transferred to the aerobic treatment tank 150.

  In the second anaerobic chamber 142, a first air lift pump 180 is installed. The first air lift pump 180 returns the sludge settled in the anaerobic treatment tank 140 to the inflow baffle 110 together with the water to be treated. The first air lift pump 180 is provided in the second anaerobic chamber 142 where no anaerobic filter bed is provided. Therefore, interference between the first air lift pump 180 and the anaerobic filter bed 144 is avoided. That is, the second anaerobic chamber 142 has the function of circulating the water to be treated flowing into the anaerobic treatment tank 140 as a downward flow in the first anaerobic chamber 141 and performing the anaerobic treatment. Has a function to isolate from The first air lift pump 180 is an example of an embodiment corresponding to the “circulating mechanism” in the present invention.

  As shown in FIG. 3, a treatment water tank 160 is set downstream of the partition wall 106 in a central region in the tank left-right direction. As shown in FIG. 6, the aerobic treatment tank 150 is formed in the treatment tank main body 101 such that the left region and the right region communicate with each other in the lower region with the treatment water tank 160 interposed therebetween. The lower region of the aerobic treatment tank 150 communicates with the treatment water tank 160.

  As shown in FIG. 6, aerobic filter beds 151a and 151b to which aerobic microorganisms for aerobic decomposition (aerobic treatment) of organic pollutants in water to be treated adhere are provided in the aerobic treatment tank 150. I have. The aerobic filter bed 151a is provided in a region below the aerobic filter bed 151b. The aerobic filter bed 151a is constituted by a filter material in the form of a mesh roll. Specifically, the filter material in the form of a net-like roll is a net-like body in which a wire made of a resin such as polypropylene or polyethylene is three-dimensionally entangled, and is formed into a cylindrical shape having a diameter of about 100 mm and a length of about 100 mm. Therefore, the aerobic filter bed 151a is configured by filling a predetermined region with a plurality of mesh-like roll-shaped filter media. The aerobic filter medium of the aerobic filter bed 151a may be a mesh-like, spherical, or plate-like filter material, or a filter material formed of a porous material. On the other hand, the aerobic filter bed 151b is made of a block-like (single) filter medium. Specifically, the block-shaped filter medium is a net-like body in which a wire made of a resin such as polypropylene or polyethylene is three-dimensionally entangled, and is integrally formed in a block shape. Therefore, the upper aerobic filter bed 151b has a lid function of preventing the plurality of filter media of the lower aerobic filter bed 151a from flowing out. The aerobic filter bed 151b is held by a holding member such as a net or a plate-like member supported by the processing tank main body 101. The aerobic filter medium of the aerobic filter bed 151b may be formed in another shape such as a plate shape as long as the filter medium is integrally formed.

  As shown in FIG. 6, the aerobic treatment tank 150 is provided with a second air diffuser 191. Thereby, the water to be treated passing through the aerobic filter bed 151 is aerobically treated by the air supplied from the second air diffuser 191. The to-be-processed water subjected to the aerobic treatment by the aerobic filter beds 151a and 151b is transferred to a lower region of the aerobic treatment tank 150.

  As shown in FIGS. 1 and 6, the treatment water tank 160 is provided with a second air lift pump 181. The second air lift pump 181 extends to a lower region of the treatment water tank 160. Thus, a part of the water to be treated transferred from the aerobic treatment tank 150 to the treatment water tank 160 is returned to the inflow baffle 110 by the second air lift pump 181 before being transferred to the treatment water tank 160. Thereby, the water to be treated in the water treatment apparatus 100 circulates through the inflow baffle 110, the sedimentation separation tank 120, the anaerobic treatment tank 140, and the aerobic treatment tank 150. The second air lift pump 181 is an example of an embodiment corresponding to the “circulating mechanism” in the present invention.

  As shown in FIGS. 1 and 2, a disinfection tank 170 partitioned by a partition wall 171 is provided in the treated water tank 160. Further, the treatment water tank 160 is provided with a third air lift pump 182 for transferring the water to be treated in the treatment water tank 160 to the disinfection tank 170.

  The disinfecting tank 170 is provided with a medicine tube (not shown) filled with a solid disinfectant for performing a disinfecting process. The water that has been subjected to the disinfection treatment by the disinfectant eluted from the medicine tube is discharged to the outside of the treatment tank main body 101 through the outflow pipe 103. Further, another tank, for example, a discharge pump tank provided with a discharge pump may be provided downstream of the disinfection tank 170.

  The first to third air lift pumps 180 to 182 and the first and second air diffusers 190 and 191 are connected to an air supply device (not shown), and the supply and cutoff of air are switched by an air valve. The air valves provided in the first to third air lift pumps 180 to 182 and the first and second air diffusers 190 and 191 are controlled by a controller (not shown).

  The heads of the first to third air lift pumps 180 to 182 fluctuate with the fluctuation of the water level in the water treatment area. That is, as the level of the water to be treated in the water treatment area increases, the head becomes shorter, and the amount of the water to be treated transferred by the air lift pump increases. On the other hand, when the level of the water to be treated in the water treatment area is low, the head becomes longer, and the transfer amount of the water to be treated by the air lift pump is reduced. Therefore, by using the air lift pump, even when the amount of drainage flowing into the water treatment apparatus 100 increases and the water level in the water treatment area rises, the capacity of the air lift pump can be increased in accordance with the rise in the water level. .

  According to the present embodiment described above, in the water treatment apparatus 100, the cleaning holes 130 are arranged so as to be surrounded by the sedimentation separation tank 120 in a plan view. Therefore, communication between the sedimentation separation tank 120 and the cleaning hole 130 is achieved in a plurality of directions. That is, the sedimentation separation tank 120 and the cleaning hole 130 communicate with each other in the left-right direction and the front-back direction of the processing tank body 101. Thereby, the water to be treated is efficiently circulated between the sedimentation separation tank 120 and the cleaning hole 130.

  Further, according to the present embodiment, the swirling flow is generated in the water to be treated in the cleaning hole 130 by the air supplied from the first diffuser pipe 190, and the sedimentation separation tank 120 is formed by the flow of the water to be treated by the swirling flow. The water to be treated is efficiently circulated between the cleaning hole 130 and the cleaning water.

  Further, according to the present embodiment, since the air supplied from the first air diffuser 190 is subdivided by the filter medium 132, the sludge contained in the water to be swirled in the cleaning hole 130 is effectively reduced by the fine bubbles. Aerobic treatment can be performed.

  In the above-described embodiment, the water treatment apparatus 100 is provided with the air lift pump. However, a submersible pump other than the air lift pump may be provided. In that case, the controller controls the transfer amount of the water to be treated by the submersible pump according to the fluctuation of the water level.

  Further, in the above embodiment, the water treatment apparatus 100 includes the inflow baffle 110, the sedimentation separation tank 120, the cleaning hole 130, the anaerobic treatment tank 140, the aerobic treatment tank 150, the treatment water tank 160, and the disinfecting tank 170. However, the number and type of processing elements can be variously selected as necessary.

  Further, in the above embodiment, the water treatment apparatus 100 for treating raw water discharged from general homes, apartment houses, and the like has been described. However, the present invention is not limited to general homes, apartment houses, commercial facilities, public facilities, The present invention is also applicable to a water treatment device for treating raw water discharged from equipment such as a factory.

(Correspondence relationship between each component of the embodiment and each component of the present invention)
The above embodiment is an example of an embodiment for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the embodiment. The correspondence between each component of the embodiment and each component of the present invention is shown below.
The water treatment device 100 is an example of a configuration corresponding to the “water treatment device” of the present invention.
The processing tank main body 101 is an example of a configuration corresponding to the “tank main body” of the present invention.
The side walls 101a, 101b, 101c, and 101d are examples of a configuration corresponding to the “outer wall” of the present invention.
The bottom wall 101e is an example of a configuration corresponding to the “outer wall” of the present invention.
The upper wall 101f is an example of a configuration corresponding to the “outer wall” of the present invention.
The side wall 101a is an example of a configuration corresponding to the “first outer wall” of the present invention.
The side wall 101b is an example of a configuration corresponding to the “second outer wall” of the present invention.
The sedimentation separation tank 120 is an example of a configuration corresponding to the “sedimentation tank” of the present invention.
The cleaning hole 130 is an example of a configuration corresponding to the “vertical hole” of the present invention.
The partition wall 131 is an example of a configuration corresponding to the “vertical hole forming wall portion” of the present invention.
The filter medium 132 is an example of a configuration corresponding to the “mesh filter medium” of the present invention.
The partition 105 is an example of a configuration corresponding to the “partition” of the present invention.
The opening 105a is an example of a configuration corresponding to the “convection opening” of the present invention.
The opening 105b is an example of a configuration corresponding to the “convection opening” of the present invention.
The first air lift pump 180 is an example of a configuration corresponding to the “circulation mechanism” of the present invention.
The second air lift pump 181 is an example of a configuration corresponding to the “circulation mechanism” of the present invention.
The first air diffuser 190 is an example of a configuration corresponding to the “air supply unit” of the present invention.

REFERENCE SIGNS LIST 100 Water treatment apparatus 101 Treatment tank main body 101a Side wall 101b Side wall 101c Side wall 101d Side wall 101e Bottom wall 101f Top wall 102 Inflow pipe 103 Outflow pipe 104 Manhole section 105 Partition 105a Opening 105b Opening 106 Partition 106a Opening 106b Opening 110 Inflow baffle 120 Sedimentation separation tank 130 Cleaning hole 130a Lower end opening 130b Upper end opening 131 Partition wall 132 Filter material 140 Anaerobic treatment tank 141 First anaerobic chamber 142 Second anaerobic chamber 143 Partition wall 144 Anaerobic filter bed 150 Aerobic treatment tank 151 Aerobic filter bed 160 Treatment water tank 161 Partition wall 170 Disinfection tank 171 Partition wall 180 First air lift pump 181 Second air lift pump 182 Third air lift pump 190 First air diffuser 191 Second air diffuser

Claims (8)

A water treatment apparatus including a water treatment tank that performs treatment on water to be treated including sludge,
A tank body having an outer wall;
A sedimentation tank provided in the tank body, for sedimenting sludge contained in the water to be treated,
A vertical hole communicating with the bottom of the sedimentation tank, through which water to be treated in the sedimentation tank can flow, and an air supply unit capable of supplying air to the vertical hole,
The vertical hole is disposed apart from the outer wall of the tank body ,
The vertical hole is provided with a mesh filter medium extending in the vertical direction,
The air supplied from the air supply unit is configured to pass through the mesh filter medium, so that the air is subdivided,
The vertical hole is configured by a mesh-like filter medium arranged area provided with the mesh-like filter medium, and a mesh-like filter medium non-arranged area other than the mesh-like filter medium arranged area,
The mesh filter medium disposition area is provided above the air diffuser of the air supply unit,
The air supplied from the air supply unit generates an upward flow in the mesh filter medium arrangement area, generates a downward flow in the mesh filter medium non-arrangement area, and generates a swirl flow in the vertical hole. Is configured to
The water treatment apparatus , wherein the swirling flow forms a deposited sludge circulation means for circulating the deposited sludge in the settling tank together with the water to be treated in the vertical hole . The water treatment device according to claim 1,
The water treatment area, wherein the mesh-like filter medium arrangement area and the mesh-like filter medium non-arrangement area are provided adjacent to each other. The water treatment device according to any one of claims 1 to 2,
The tank body has a first outer wall and a second outer wall parallel to each other,
The water treatment device, wherein the vertical hole is disposed in a region including a central region in a width direction of the tank main body with respect to a width direction of the tank main body orthogonal to the first outer wall and the second outer wall. . The water treatment device according to claim 3,
The water treatment apparatus according to claim 1, wherein the vertical hole is configured by a region that passes through a center of the tank body in the width direction and is symmetric with respect to a virtual plane parallel to the first outer wall and the second outer wall. The water treatment apparatus according to any one of claims 1 to 4,
The water to be treated is configured to flow into the settling tank from outside the water treatment device,
The water treatment apparatus according to claim 1, wherein the water to be treated is transferred to the vertical hole via a bottom region of the sedimentation tank. The water treatment device according to any one of claims 1 to 5,
In the tank body, downstream of the sedimentation tank, a treatment tank for aerobic treatment or anaerobic treatment of the water to be treated is provided,
A partition for partitioning the settling tank and the processing tank is provided,
A water treatment apparatus, wherein a vertical hole forming wall for forming the vertical hole is attached to the partition. The water treatment device according to claim 6,
A water treatment apparatus, comprising: a circulating mechanism that transfers the water to be treated in the treatment tank to the sedimentation tank and circulates the water to be treated between the sedimentation tank and the treatment tank. The water treatment device according to claim 6 or 7,
The water treatment apparatus according to claim 1, wherein the partition wall is formed with two advection openings for advancing the water to be treated from the sedimentation tank to the treatment tank with the vertical hole interposed therebetween.

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