JP6588209B2 - Water treatment equipment - Google Patents

Description

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

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

JP 2008-012465 A

  In said water treatment apparatus, sewage distribute | circulates between a solid-liquid separation tank and an aerobic digestion tank in the tank lower part, and the process of sewage is performed in each tank. In the treatment of such sewage, the sewage needs to be distributed efficiently, and there is room for further improvement with respect to the configuration of the water treatment apparatus. This invention is made | formed in view of this point, and makes it a subject to provide the technique which accelerates | stimulates the distribution | circulation of the to-be-processed water efficiently.

  The above problems are solved by the present invention. According to the preferable form of the water treatment apparatus which concerns on this invention, the water treatment apparatus provided with the water treatment tank which processes with respect to the to-be-processed water containing sludge is comprised. This water treatment apparatus has a tank main body, a sedimentation tank, a vertical hole, and an air supply part. A tank main body is a tank-shaped member which has the outer wall which comprises the outline of a water treatment apparatus. Inside this tank main body, each tank which processes to-be-processed water is provided as a water treatment area | region. Specifically, a sedimentation tank for precipitating sludge contained in the water to be treated and a vertical hole that communicates with the bottom of the precipitation tank and through which the water to be treated in the sedimentation tank can come and go are provided. Furthermore, the water treatment apparatus has an intake air supply unit that can supply air to the vertical holes. Preferably, an upward flow is generated when the air supplied from the air supply unit rises in the water to be treated, and a downward flow is generated according to the upward flow. 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. The vertical hole is disposed away from the outer wall of the tank body. The vertical hole is configured as a region partitioned 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 spaced from the bottom of the tank body, whereby the sedimentation tank and the vertical hole communicate with each other at the bottom of the tank body. More preferably, the water to be treated flows into the settling tank from the outside of the water treatment apparatus, and the water to be treated is transferred to the vertical hole through the bottom region of the settling tank. .

  According to the present invention, since the vertical hole is spaced apart from the outer wall of the tank body, the precipitation tank can be disposed around the vertical hole. Therefore, in the sedimentation tank and the vertical hole that communicate with each other at the bottom of the tank body, the sedimentation tank and the vertical hole can be communicated in a plurality of directions (for example, the front-rear direction and the left-right direction of the tank body). Thereby, the distribution | circulation (exchange) of sludge with a to-be-processed water is efficiently performed between a sedimentation tank and a vertical hole.

In the water treatment apparatus according to the present invention, the vertical hole is further configured by a filter medium arrangement area provided with a filter medium and a filter medium non-arrangement area other than the filter medium arrangement area. This filter medium arrangement | positioning area | region is provided above the air diffuser of the air supply part. That is, the filter medium is provided above the air diffuser. The air supplied from the air supply unit generates an upward flow in the filter medium arrangement region, and generates a downward flow in the filter medium non-arrangement region. As a result, a swirl flow is generated in the vertical hole. Therefore, while the inside of the vertical hole is agitated by air, the sludge that is swirled by the swirling flow in the vertical hole is aerobically treated by the fragmented air (bubbles).

According to the further form of the water treatment apparatus which concerns on this invention, the filter medium is comprised with the mesh- shaped filter medium provided so that it might extend in the vertical direction at the vertical hole. And it is comprised so that air supplied from the air supply part may be subdivided by passing through a mesh filter medium . 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 interior of the mesh filter medium to the lower region of the vertical hole.

  According to the further form of the water treatment apparatus according to the present invention, the tank body has a first outer wall and a second outer wall that are parallel to each other. And the vertical hole is arrange | positioned in the area | region containing the center area | region of the width direction of a tank main body regarding the width direction of the tank main body orthogonal to a 1st outer wall and a 2nd outer wall. Therefore, a 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. Suitably, a vertical hole is comprised by the area | region symmetrical with respect to the virtual plane parallel to a 1st outer wall and a 2nd outer wall through the center of the width direction in a tank main body.

  According to the further form of the water treatment apparatus which concerns on this invention, the processing tank which performs aerobic treatment or anaerobic treatment of to-be-processed water is provided in the downstream of the precipitation tank in the tank main body. In addition, as a processing tank, an aerobic processing tank and / or an anaerobic processing tank are provided. Moreover, treatment tanks other than the aerobic treatment tank and the anaerobic treatment 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. And in the tank main body, the partition for dividing a sedimentation tank and a processing tank is provided, and the vertical hole formation wall part for forming a vertical hole is attached to the said partition. Typically, a water treatment apparatus comprises each water treatment area | region by attaching a partition with respect to a tank-shaped tank main 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 the assembly body is attached to the tank body. In this case, the vertical hole is provided simultaneously with the assembly of the partition wall. Therefore, the manufacturing process of the water treatment device can be simplified.

  According to the further form of the water treatment apparatus which concerns on this invention, the circulation mechanism which circulates to-be-processed water between a settling tank and a processing tank by advancing the to-be-processed water in a processing tank to a settling tank is provided. . A pump for returning 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 that makes the transfer amount of the water to be treated variable by changing the head according to the water level of the water to be treated in the water treatment tank is used.

  According to the further form of the water treatment apparatus which concerns on this invention, two advection openings for advancing to-be-processed water from a sedimentation tank to a treatment tank are formed in the partition across the vertical hole. Therefore, even if it is the structure by which the stirring tank is provided in the center area | region, to-be-processed water can be advected through two advection 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 accelerates | stimulates the distribution | circulation of the to-be-processed water in a water treatment apparatus is provided.

It is a figure which shows the outline | summary of the water treatment apparatus which concerns on typical embodiment of this invention. It is a figure which shows the process 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. It is sectional drawing in the IV-IV line of FIG. It is sectional drawing in the VV line of FIG. It is sectional drawing in the VI-VI line of FIG.

  Below, the structure of the water treatment apparatus in typical embodiment of this invention is demonstrated with reference to FIGS. In the present embodiment, a water treatment apparatus that receives and treats raw water (also referred to as “drainage” or “treated water”) discharged from ordinary households and apartment houses into a water treatment area will be described.

  As shown in FIG. 1, the water treatment embedding apparatus 100 includes a tank-shaped treatment tank main body 101 that constitutes a casing (outer shell) of the water treatment embedding apparatus 100. As shown in FIGS. 1 and 2, the processing tank body 101 is formed in a substantially rectangular shape in plan view, and includes side walls 101a and 101b parallel to each other, side walls 101c and 101d parallel to each other, 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 sewage) together with manure. This processing tank main body 101 is the implementation structural example corresponding to the "tank main body" in this invention.

  As shown in FIG. 1, the processing tank main body 101 includes an inflow pipe 102, an outflow pipe 103, and a manhole portion 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 leading the treated water from the internal space of the treatment tank body 101. The manhole portion 104 is configured as a portion where manholes for tank entry, internal inspection, and cleaning are formed.

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

  As shown in FIG. 1, a water treatment region in which a 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 precipitation separation tank 120, a cleaning hole 130, an anaerobic treatment tank 140, an aerobic treatment tank 150, a treated water tank 160, and a disinfection tank 170 are formed. As shown in FIG. 2, the waste water flowing into the treatment tank main body 101 (inflow baffle 110) through the inflow pipe 102 is discharged into the precipitation separation tank 120, the anaerobic treatment tank 140, the aerobic treatment tank 150, the treated water tank 160 and the disinfection tank 170. The treated water is sequentially filled and the treated water flows out of the treatment tank body 101 through the outflow pipe 103. Moreover, it is comprised so that to-be-processed water may circulate between the precipitation separation tank 120 and the cleaning hole 130, and between the anaerobic processing tank 140 and the aerobic processing tank 150. FIG. The water treatment apparatus 100 may be configured as a purification tank that discharges the water that has flowed out of the treatment tank body 101 as it is, or the water that has flowed out of the treatment tank body 101 is used as toilet or water for watering. You may comprise as a water reuse apparatus to reuse.

  The inflow baffle 110 constitutes the most upstream area of the water treatment area. Waste water that has flowed into the inflow baffle 110 from the inflow pipe 102 is transferred to the sedimentation separation tank 120. The treated water that has flowed into the precipitation separation tank 120 is subjected to solid-liquid separation treatment, and the solid components separated from the treated water are deposited on the bottom of the precipitation separation tank 120 as precipitation sludge. As the wastewater flows into the inflow baffle 110, the wastewater indirectly flows into the precipitation separation tank 120, and stirring of the sludge that has settled in the precipitation separation tank 120 is suppressed. The precipitation separation tank 120 provided with this inflow baffle 110 is an implementation structural example corresponding to the "precipitation tank" in this invention.

  As shown in FIGS. 1 and 3, a partition wall 105 extending in the vertical direction of the tank is provided between the precipitation separation tank 120 and the anaerobic treatment tank 140 on the downstream side. The partition wall 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 the precipitation separation tank 120 and the anaerobic treatment tank 140 are formed in the upper region of the partition wall 105. As shown in FIGS. 3 and 4, a partition wall 131 for partitioning the precipitation 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 left-right direction of the tank, and is provided apart from the side walls 101c and 101d in the front-rear direction of the tank. By this partition wall 131, the cleaning hole 130 is set corresponding to the central region of the partition wall 105 in the horizontal direction of the tank. That is, the cleaning hole 130 includes a central part in the left-right direction of the processing tank main body 101 and has a symmetrical shape with respect to the central part as shown in FIG. In other words, the cleaning hole 130 is formed symmetrically with respect to a virtual plane that passes through the center of the processing tank body 101 in the horizontal direction of the tank and extends in the tank front-rear direction. With respect to the cleaning hole 130, the openings 105 a and 105 b are provided on the left and right sides of the cleaning hole 130, respectively. The partition wall 105 and the partition wall 131 are implementation configuration examples corresponding to the “partition wall” and the “vertical hole forming wall portion” in the present invention, respectively. Moreover, the cleaning hole 130 is an implementation structural example corresponding to the "vertical hole" in this invention. Moreover, the opening parts 105a and 105b are the implementation structural examples corresponding to the "convection opening" in this invention. Further, the side walls 101a and 101b are implementation configuration examples corresponding to the “first outer wall” and the “second outer wall” in the present invention, respectively.

  As shown in FIG. 1 and FIG. 4, the lower end portion of the partition wall 131 is disposed so as to be separated from the bottom portion (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 portion 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 spaced 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 spaced downward from the upper wall 101f. The cleaning hole 130 is provided with a long and mesh-shaped filter medium 132 formed as a draft tube and a first air diffuser 190 penetrating the filter medium 132. As shown in FIG. 4, the first air diffuser 190 is disposed in the right region of the cleaning hole 130. The area on the right side of the cleaning hole 130 is an implementation configuration example corresponding to the “filter medium arrangement area” in the present invention. Therefore, the left region where the filter medium is not disposed in the cleaning hole 130 is an implementation configuration example corresponding to the “filter medium non-arrangement region” in the present invention. When air is supplied into the cleaning hole 130 from the lower end portion of the first air diffuser 190 through the lower end opening 130 a, an upward flow is generated in the region on the right side of the cleaning hole 130, and the region on the left side of the cleaning hole 130. A downward flow is generated at. Thereby, a swirl flow is generated in the cleaning hole 130 and the water to be treated in the cleaning hole 130 is agitated. Therefore, the cleaning hole 130 is also referred to as a stirring hole for stirring the water to be treated. This filter medium 132 is an implementation structural example corresponding to the "filter medium" in this invention. The first air diffuser 190 is an implementation configuration example 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 accumulated at the bottom of the sedimentation separation tank 120 circulates in the cleaning hole 130 together with the water to be treated by a swirling flow (upward flow and downward flow). In the cleaning hole 130, the sludge is aerobically treated efficiently by the fragmented air. Due to the fluctuation of the water level in the water treatment region, the sludge in the cleaning hole 130 and the sludge at the bottom of the precipitation separation tank 120 come and go, and thereby the sludge containing bubbles is supplied into the precipitation separation tank 120. As a result, in the sedimentation separation tank 120, sludge containing bubbles rises and scums, and the sludge is stored at a high concentration.

  As shown in FIG. 3, the water to be treated in the precipitation separation tank 120 is transferred to the anaerobic treatment tank 140 on the downstream side 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. A partition wall 106 extending in the vertical direction of the tank is provided between the anaerobic processing tank 140 and the aerobic processing chamber 150 on the downstream side. 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 as shown in FIG. By the 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 portion of the partition wall 143 is disposed so as to be separated from the bottom portion of the processing tank body 101, whereby the lower region of the first anaerobic chamber 141 communicates with the second anaerobic chamber 142. is doing.

  Further, as shown in FIG. 3, a partition wall 161 for partitioning a region downstream of the partition wall 106 into an aerobic treatment tank 150 and a treated water tank 160 is attached to the rear side (downstream side) of the partition wall 106. Yes. The length of the second anaerobic chamber 142 partitioned by the partition wall 143 in the horizontal direction of the tank is set to be longer than the length of the treated water tank 160 partitioned by the partition wall 161 in the horizontal direction of the tank. As a result, as shown in FIGS. 3, 5, and 6, in the partition wall 106, the outside of the partition wall 161 (the outside of the treated water tank 160) and the inside of the partition wall 143 (second) in the horizontal direction of the tank. On the inner side of the anaerobic chamber 142, left and right openings 106 a and 106 b communicating with 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 in a state in which the partition wall 143 and the partition wall 161 are attached to the partition wall 106 in advance. That is, the partition 106, the partition wall 143, and the partition wall 161 are comprised as an assembly body. 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 efficiently and simply installed.

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

  The water to be treated that has been anaerobically treated in the first anaerobic chamber 141 is transferred from the lower region of the first anaerobic chamber 141 to the lower region of the second anaerobic chamber 142, and rises in the second anaerobic chamber 142. Thereafter, the water to be treated passes through the opening 106a and the opening 106b and is transferred to the aerobic treatment tank 150.

  A first air lift pump 180 is installed in the second anaerobic chamber 142. The first air lift pump 180 returns the sludge precipitated 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 a 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 a function of anaerobically treating the treated water flowing into the anaerobic treatment tank 140 as a downward flow in the first anaerobic chamber 141, and the first air lift pump 180 in the anaerobic filter bed 144. It has the function of isolating from This 1st air lift pump 180 is the implementation structural example corresponding to the "circulation mechanism" in this invention.

  As shown in FIG. 3, a treated water tank 160 is set in a central area in the left-right direction of the tank on the downstream side of the partition wall 106. As shown in FIG. 6, the aerobic treatment tank 150 is formed in the treatment tank main body 101 so 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 treated water tank 160.

  As shown in FIG. 6, in the aerobic treatment tank 150, aerobic filter beds 151a and 151b to which aerobic microorganisms for aerobically decomposing (aerobic treatment) organic pollutants in the water to be treated are provided. Yes. The aerobic filter bed 151a is provided in a region below the aerobic filter bed 151b. The aerobic filter bed 151a is composed of a net-like roll-shaped filter medium. Specifically, the net-like roll-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 formed into a cylindrical shape having a diameter of about 100 mm and a length of about 100 mm. Accordingly, the aerobic filter bed 151a is configured by filling a predetermined region with a plurality of mesh-like filter media. The aerobic filter medium of the aerobic filter bed 151a may be a net-like, spherical or plate-like filter medium, or a filter medium formed of a porous material. On the other hand, the aerobic filter bed 151b is configured by 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 tangled in three dimensions, and is integrally formed in a block shape. Therefore, the upper aerobic filter bed 151b has a lid function that prevents 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 member supported by the processing tank main body 101. Note that the aerobic filter medium of the aerobic filter bed 151b may be formed into another shape such as a plate as long as it is an integrally formed filter medium.

  As shown in FIG. 6, the aerobic treatment tank 150 is provided with a second air diffuser 191. Thereby, the to-be-processed water which passes the aerobic filter bed 151 is aerobically processed by the air supplied from the 2nd diffuser pipe 191. The water to be treated that has been aerobically treated by the aerobic filter beds 151 a and 151 b is transferred to the lower region of the aerobic treatment tank 150.

  As shown in FIGS. 1 and 6, the treated water tank 160 is provided with a second air lift pump 181. The second air lift pump 181 extends to the lower region of the treated water tank 160. Thereby, 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 to-be-processed water in the water treatment apparatus 100 circulates in the inflow baffle 110, the precipitation separation tank 120, the anaerobic treatment tank 140, and the aerobic treatment tank 150. This 2nd air lift pump 181 is the implementation structural example corresponding to the "circulation mechanism" in this 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 treated water tank 160 is provided with a third air lift pump 182 for transferring the treated water in the treated water tank 160 to the disinfection tank 170.

  The disinfection tank 170 is provided with a medicine cylinder (not shown) filled with a solid disinfectant for performing disinfection processing. The water that has been sterilized by the disinfectant eluted from the medicine cylinder is discharged to the outside of the treatment tank body 101 through the outflow pipe 103. Further, another tank such as 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 air supply and cutoff 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 vary with the fluctuation of the water level in the water treatment region. That is, when the water level of the water to be treated in the water treatment region becomes high, the head becomes short and the amount of water to be treated by the air lift pump increases. On the other hand, when the water level of the water to be treated in the water treatment region becomes low, the lift becomes long and the amount of water to be treated by the air lift pump decreases. Therefore, by using the air lift pump, even when the amount of waste water 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 according to the rise in the water level. .

  According to the above embodiment, in the water treatment apparatus 100, the cleaning hole 130 is disposed so as to be surrounded by the precipitation separation tank 120 in a plan view. Therefore, communication between the precipitation 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-rear direction of the processing tank main body 101. Thereby, the to-be-processed water distribute | circulates efficiently between the precipitation separation tank 120 and the cleaning hole 130. FIG.

  In addition, according to the present embodiment, the air supplied from the first air diffuser 190 generates a swirling flow in the water to be treated in the cleaning hole 130, and the precipitation separation tank 120 by the flow of the water to be treated by the swirling flow. The treated water is efficiently circulated between the cleaning holes 130.

  Moreover, according to this embodiment, since the air supplied from the 1st air diffusion pipe 190 is subdivided by the filter medium 132, the sludge contained in the to-be-processed water swirling in the cleaning hole 130 is effectively removed by fine bubbles. Aerobic treatment can be performed.

  In the above embodiment, the air treatment pump 100 is provided in the water treatment apparatus 100, but a submersible pump other than the air lift pump may be installed. 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.

  Moreover, in the above embodiment, the water treatment apparatus 100 has each treatment element of the inflow baffle 110, the sedimentation separation tank 120, the cleaning hole 130, the anaerobic treatment tank 140, the aerobic treatment tank 150, the treated water tank 160, and the disinfection tank 170. However, the number and types of processing elements can be variously selected as necessary.

  Moreover, in the above embodiment, although the water treatment apparatus 100 which processes raw | natural water discharged | emitted from a general household, an apartment house, etc. was described, this invention is a commercial facility, a public facility, The present invention can also be applied to a water treatment apparatus that treats raw water discharged from facilities such as factories.

(Correspondence between each component of the embodiment and each component of the present invention)
The above embodiment shows an example for carrying out the present invention. Therefore, the present invention is not limited to the configuration of the embodiment. The correspondence relationship between each component of the embodiment and each component of the present invention is shown below.
The water treatment apparatus 100 is an example of a configuration corresponding to the “water treatment apparatus” 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, 101d are an example 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 precipitation separation tank 120 is an example of a configuration corresponding to the “precipitation 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 “longitudinal hole forming wall” of the present invention.
The filter medium 132 is an example of a configuration corresponding to the “filter medium” of the present invention.
The partition wall 105 is an example of a configuration corresponding to the “partition wall” 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.

DESCRIPTION OF SYMBOLS 100 Water treatment apparatus 101 Processing 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 part 105 Partition 105a Opening part 105b Opening part 106 Partitioning part 106a Opening part 106b Opening part 110 Inflow baffle 120 Precipitation separation tank 130 Cleaning hole 130a Lower end opening 130b Upper end opening 131 Partition wall 132 Filter medium 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 Treated 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 for treating water to be treated containing sludge,
A tank body having an outer wall;
A settling tank provided in the tank body for precipitating sludge contained in the water to be treated;
A vertical hole that communicates with the bottom of the settling tank and allows the treated water in the settling tank to come and go; and an air supply that can supply air to the vertical hole,
The vertical hole is spaced apart from the outer wall of the tank body ,
Furthermore, the vertical hole is composed of a filter medium arrangement area provided with a filter medium, and a filter medium non-arrangement area other than the filter medium arrangement area,
The filter medium arrangement region is provided above the air supply port of the air supply unit,
An upward flow is generated in the filter medium arrangement region by the air supplied from the air supply unit, a downward flow is generated in the filter medium non-arrangement region, and a swirl flow is generated in the vertical hole. The water treatment apparatus characterized by the above-mentioned . The water treatment device according to claim 1,
The filter medium is constituted by a mesh filter medium provided in the vertical hole so as to extend in the vertical direction,
The water treatment apparatus is configured such that the air supplied from the air supply unit passes through the mesh filter medium , so that the air is subdivided. The water treatment device according to claim 1 or 2 ,
The tank body has a first outer wall and a second outer wall parallel to each other,
The said vertical hole is arrange | positioned in the area | region containing the center area | region of the width direction of the said tank main body regarding the width direction of the said tank main body orthogonal to the said 1st outer wall and the said 2nd outer wall. . The water treatment device according to claim 3 ,
The said vertical hole is comprised by the area | region symmetrical with respect to the virtual plane parallel to the said 1st outer wall and the said 2nd outer wall through the center of the said width direction in the said tank main body. The water treatment apparatus according to any one of claims 1 to 4 ,
The water to be treated flows into the settling tank from the outside of the water treatment device,
The water treatment apparatus is configured such that water to be treated is transferred to the vertical hole through a bottom region of the settling tank. The water treatment device according to any one of claims 1 to 5 ,
In the tank body, downstream of the settling tank, a treatment tank for aerobic treatment or anaerobic treatment of water to be treated is provided,
A partition wall for partitioning the settling tank and the processing tank is provided,
A water treatment apparatus, wherein a vertical hole forming wall part for forming the vertical hole is attached to the partition wall. The water treatment device according to claim 6 ,
A water treatment apparatus comprising a circulation mechanism for circulating the water to be treated between the precipitation tank and the treatment tank by transferring the water to be treated in the treatment tank to the precipitation tank. The water treatment device according to claim 6 or 7 ,
2. The water treatment apparatus according to claim 2, wherein the partition wall is formed with two advection openings for advancing water to be treated from the settling tank to the treatment tank with the vertical hole interposed therebetween.

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