Water treatment equipment

Abstract

To provide an embodiment technique for conducting active supply of target water to a disinfection tank in a water treatment device where target water is subjected to disinfection treatment and then discharged.SOLUTION: A treatment tank body of a water treatment device is provided with a disinfection tank 170 having a baffle part 171a and cartridge 180. In the disinfection tank 170, a target water transfer pump 192 discharges target water in a predetermined first direction, and the baffle part 171a in the disinfection tank 170 supplies target water to a cartridge 180 under a condition that its flow direction is converted to a second direction which is different from the first direction.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a water treatment device for treating wastewater such as domestic wastewater. [Background technology]

[0002] 2. Description of the Related Art In a known septic tank, water to be treated after a predetermined treatment is transferred to a disinfection tank, where it is disinfected and then released. For example, Japanese Utility Model Application Laid-Open Publication No. 01-139894 discloses a specific configuration of a disinfection tank in a septic tank. In this disinfection tank, the water to be treated is naturally transported from the upstream side to the disinfection tank according to a predetermined water level in the septic tank, and when the water to be treated comes into contact with a disinfectant-containing cartridge placed in the disinfection tank, the disinfectant dissolves, thereby carrying out disinfection of the water to be treated.

[0003] On the other hand, in light of the recent trend toward more advanced treatment in septic tanks, there is a demand for technology that supplies the water to be treated to the disinfection tank via a transfer device such as an air lift pump, regardless of the water level in the septic tank, thereby promoting active disinfection and discharge of the water to be treated.

[0004] In this regard, in the above-mentioned known septic tanks, the problems associated with the active supply of treated water to the disinfection tank have not been addressed, and further in-depth consideration is required from the perspective of improving the treatment capabilities of septic tanks. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 01-139894 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of this point, and aims to provide a concrete technology for actively supplying treated water to a disinfection tank in a water treatment device that is configured to disinfect the treated water before discharging it. [Means for solving the problem]

[0007] The above problems are solved by the present invention. According to a preferred embodiment of the water treatment device of the present invention, the water treatment device is configured to treat water containing sludge. This water treatment device treats water containing sludge, and comprises an inflow tank into which the water to be treated flows, an anaerobic treatment tank located downstream of the inflow tank and performing anaerobically treating the water to be treated, an aerobic treatment tank located downstream of the anaerobic treatment tank and performing aerobically treating the water to be treated, a disinfection tank located downstream of the aerobic treatment tank and performing disinfection of the water to be treated, a baffle unit located in the disinfection tank, a chemical cartridge located at a predetermined position within the disinfection tank and containing a disinfectant for disinfecting the water to be treated, configured so that the disinfectant dissolves in the water to be treated upon contact with the water to be treated, and a water to be treated transfer pump for transferring the water to the disinfection tank.

[0008] The treated water transfer pump discharges the treated water in a predetermined first direction in the disinfection tank, and the baffle section converts the flow direction of the treated water in the disinfection tank to a second direction different from the first direction and supplies the water to the cartridge. When a configuration is adopted in which the water to be treated is actively supplied to the disinfection tank using a water transfer pump, the water flow of the water to be treated becomes strong due to this active supply, and this strong water flow may affect the disinfectant, unnecessarily accelerating the consumption rate of the disinfectant in the disinfection tank and causing a disinfectant shortage. The present invention reliably prevents such problems by adopting a baffle section. Specifically, the baffle section converts the flow direction of the water to be treated into a second direction different from the first direction in the disinfection tank and supplies the water to the cartridge.

[0009] By configuring it in this manner, even if the treated water transfer pump discharges the treated water into the disinfection tank at a relatively high speed, the baffle section can change the flow direction from the first direction to the second direction, slowing down the treated water before bringing it into contact with the disinfectant, thereby preventing situations such as the disinfectant consumption rate being unnecessarily increased or an unintended disinfectant shortage.

[0010] The baffle section may be any member capable of changing the flow direction of the water to be treated, and typically a flat baffle plate may be used. Alternatively, various configurations may be used, such as a curved baffle plate whose curvature is adjusted to improve the accuracy of the change in direction, a tubular baffle section, or a combination of these. Furthermore, an air lift pump is typically used as the treated water transfer pump, but other means, such as a submersible pump, can also be suitably employed. The present invention deals with wastewater, and even if, for example, stagnation occurs in part of the water to be treated in the disinfection tank, causing the flow to stagnate in some places, the present invention is encompassed as long as the flow direction of the water to be treated is changed from the first direction to the second direction overall.

[0011] In a further preferred embodiment of the present invention, the baffle portion can be formed by a tank wall of the disinfection tank. By giving the tank wall of the disinfection tank the function of a baffle section, it can serve as both a constituent element of the disinfection tank and a flow direction changer for the water to be treated, thereby further streamlining the component configuration.

[0012] In a further preferred embodiment of the present invention, the angle at which the baffle section changes the flow direction of the water to be treated can be set to 90 degrees or more. By setting the angle at 90 degrees or more, the water to be treated that is actively supplied to the disinfection tank by the water transfer pump can be effectively decelerated, further facilitating control of disinfectant consumption. Note that the present invention is intended to treat wastewater, and as described above, the angle of change in flow direction is sufficient as long as the macroscopic flow direction of the water to be treated is 90 degrees or more. For example, even if stagnation occurs in part of the water to be treated in the disinfection tank, causing the flow to stagnate in part, this is encompassed by the present invention as long as the flow direction of the water to be treated can be changed to 90 degrees or more overall. Similarly, with regard to "90 degrees or more," even if the angle is not 90 degrees or more in part, this is encompassed by the present invention as long as the flow direction of the water to be treated is 90 degrees or more overall.

[0013] Furthermore, as a preferred embodiment of the present invention, a treated water tank is provided downstream of the aerobic treatment tank and upstream of the disinfection tank, and the treated water transfer pump is configured to transfer the treated water in the treated water tank to the disinfection tank. By placing a treatment tank upstream of the disinfection tank, the treatment tank will further reduce sludge settling and BOD (biochemical oxygen demand) of the water to be treated and further remove SS (suspended solids), thereby improving the disinfection efficiency in the subsequent disinfection tank. In particular, in a configuration in which the water to be treated is actively supplied to the disinfection tank using a water to be treated transfer pump, as in the present invention, it is preferable to place a treatment tank to temporarily settle the water to be treated that has undergone anaerobic and aerobic treatment.

[0014] Furthermore, as a preferred form of the present invention, the drug cylinder can be configured by providing multiple cylindrical bodies containing chemicals for disinfecting the water to be treated, and the water to be treated, whose flow direction has been changed by the baffle section, can be configured to be sent sequentially to the multiple cylindrical bodies. By using multiple cartridges, it is possible to appropriately control the amount of disinfectant dissolved in the water to be treated in each cartridge, allowing for fine control of the disinfection process. The plurality of cylindrical bodies typically correspond to a mode in which a plurality of bodies of the same shape are used, but a mode in which the amount of disinfectant contained therein differs for each cylindrical body can also be adopted. [Effects of the Invention]

[0015] According to the present invention, a concrete technique is provided for actively supplying the treated water to the disinfection tank in a water treatment device configured to disinfect the treated water before discharging it. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic plan view showing an overview of a water treatment device according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and is a schematic front view showing an overview of the water treatment device. [Figure 3] 1 is a diagram showing a treatment flow of water to be treated in a water treatment device. FIG. [Figure 4] FIG. 2 is a schematic front view showing the configuration of a disinfection tank of the water treatment device according to the present embodiment. [Figure 5] FIG. 2 is a schematic perspective view showing the configuration of a disinfection tank according to the present embodiment. [Figure 6] FIG. 2 is a front view showing the configuration of a cartridge used in a disinfection tank. [Figure 7] FIG. 10 is a schematic diagram showing details of the transfer of water to be treated by a second air lift pump. [Figure 8] FIG. 2 is a schematic plan view showing the flow state of the water to be treated in the disinfection tank. [Figure 9] FIG. 2 is a schematic front view showing the flow state of the water to be treated in the disinfection tank. DETAILED DESCRIPTION OF THE INVENTION

[0017] The configuration of a water treatment device according to an embodiment of the present invention will be described with reference to FIGS. The embodiment of the present invention describes a water treatment device that receives raw water (also called "wastewater" or "water to be treated") discharged from ordinary homes, apartment buildings, etc. into a water treatment area and treats it.

[0018] (Overall configuration of water treatment device 100) FIG. 1 is a plan view of the water treatment device 100, and FIG. 2 is a front view of the water treatment device 100 (cross section taken along line AA in FIG. 1). Water treatment device 100 has a tank-shaped treatment tank body 101 that constitutes the frame (outer shell) of water treatment device 100. As shown in FIGS. 1 and 2, the treatment tank body 101 is formed in a substantially rectangular shape in a plan view, and is composed of parallel side walls 101a and 101b, parallel side walls 101c and 101d, a bottom wall 101e, and an upper wall 101f. The water treatment device 100 according to this embodiment is a water treatment device configured to treat domestic wastewater (domestic wastewater) in addition to human waste.

[0019] An inlet pipe 102 and an outlet pipe 103 are connected to the treatment tank body 101 . The inlet 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 out the treated water from the internal space of the treatment tank body 101 . The treatment tank body 101 also has a manhole portion 104. The manhole portion 104 is configured as a portion in which a manhole is formed for entering the tank, for internal inspection, and for cleaning.

[0020] (Definitions of Members and Directions in the Water Treatment Device 100) The manhole 104 side (top wall 101f side) of the treatment tank body 101 is defined as the upper or upper part of the tank, and the opposite side (bottom wall 101e side) is defined as the lower, lower or bottom part of the tank. In addition, the inlet pipe 102 side (side wall 101c side) of the treatment tank body 101 is defined as the upstream side, and the outlet pipe 103 side (side wall 101d side) is defined as the downstream side. Also, in Figure 2, the direction along the extension surface of the manhole portion 104 is defined as the horizontal direction (also called the tank front-to-back direction), and the direction intersecting the horizontal direction is defined as the vertical direction (also called the tank up-down direction). 2 (directions perpendicular to the front-to-rear direction of the tank and the up-to-down direction of the tank, respectively, the up-to-down direction in FIG. 1) is defined as the left-to-right direction of the tank. Note that arrows in the drawing indicate the flow of the water to be treated.

[0021] (For each treatment tank) As shown in FIGS. 1 and 2, the internal space of the treatment tank body 101 is formed with a water treatment area where raw water received through an inlet pipe 102 is stored and subjected to a predetermined water treatment. In this water treatment area, a settling tank 120, an anaerobic treatment tank 140, an aerobic treatment tank 150, a treated water tank 160, and a disinfection tank 170 are formed.

[0022] As shown in Figures 1 and 2, wastewater that flows into the treatment tank main body 101 (inlet baffle 110) through the inlet pipe 102 is treated sequentially in the sedimentation tank 120, anaerobic treatment tank 140, aerobic treatment tank 150, treated water tank 160, and disinfection tank 170, and the treated water is discharged outside the treatment tank main body 101 through the outlet pipe 103. Furthermore, a portion of the water to be treated is returned from the treated water tank 160 to the inflow baffle 110 (via a first air lift pump 191, which will be described later), and the water to be treated is circulated within the water treatment device 100. The water treatment device 100 may be configured as a septic tank that directly discharges water that flows out of the treatment tank main body 101, or as a water recycling device that reuses water that flows out of the treatment tank main body 101 as water for toilets or watering.

[0023] The inlet baffle 110 constitutes the most upstream region of the water treatment region. Wastewater that flows into the inlet baffle 110 from the inlet pipe 102 is transferred to the sedimentation tank 120. The water to be treated that flows into the sedimentation tank 120 undergoes solid-liquid separation, and the solid components separated from the water to be treated are deposited at the bottom of the sedimentation tank 120 as settled sludge. When the wastewater flows into the inlet baffle 110, the wastewater indirectly flows into the sedimentation tank 120, and agitation of the settled sludge and the like in the sedimentation tank 120 is suppressed. The settling separation tank 120 having the inflow baffle 110 in this embodiment corresponds to an example embodiment corresponding to the "inflow tank" of this invention.

[0024] As shown in Figures 1 and 2, a partition wall 105 extending in the vertical direction of the tank is provided between the settling tank 120 and the anaerobic treatment tank 140 located downstream thereof. This partition wall 105 is attached to side walls 101a, 101b and bottom wall 101e. An opening 105a and a convection baffle 107 are provided in the upper region of the partition wall 105, connecting the settling tank 120 and the anaerobic treatment tank 140. This convection baffle 107 is also called an outflow baffle. The water to be treated in the settling tank 120 is transferred through the opening 105a and the advection baffle 107 to the anaerobic treatment tank 140 located downstream. The anaerobic treatment tank 140 in this embodiment corresponds to an example embodiment corresponding to the "anaerobic treatment tank" of this invention.

[0025] In the vertically middle region of the anaerobic treatment tank 140, an anaerobic filter bed 141 is provided so as to be supported by the treatment tank body 101. The anaerobic filter bed 141 is filled with a predetermined amount of anaerobic filter material to which anaerobic microorganisms that anaerobically treat organic pollutants are attached. Flat filter material or skeletal spherical filter material can be suitably used as the anaerobic filter material. In this anaerobic filter bed 141, the water undergoes anaerobically treatment and filtration, thereby reducing BOD (biochemical oxygen demand) and removing SS (suspended solids).

[0026] 1 and 2, a partition wall 106 extending in the vertical direction of the tank is provided between the anaerobic treatment tank 140 and the aerobic treatment tank 150 located downstream from the anaerobic treatment tank 140. This partition wall 106 is provided with a convection baffle 108 and an opening 106a that connects the anaerobic treatment tank 140 and the aerobic treatment tank 150. The water to be treated in the anaerobic treatment tank 140 is transferred to the downstream aerobic treatment tank 150 through the advection baffle 108 and the opening 106a. The advection baffle 108 and the opening 106a are provided on the upper side of the treatment tank main body 101, and the water to be treated in the anaerobic treatment tank 140 is advected to the aerobic treatment tank 150 from above. In Figure 2, the water level WL of the water to be treated in the treatment tank main body 101 is exactly equal to the advection baffle 108, and the water to be treated that has undergone anaerobically treatment can be advected from the anaerobic treatment tank 140 to the aerobic treatment tank 150.

[0027] As shown in Figure 1, downstream of the partition wall 106, aerobic treatment tanks 150 are arranged in the left and right regions in the left-right direction of the tank, and a treated water tank 160 is arranged in the central region. Although not shown, the aerobic treatment tank 150 is formed within the treatment tank body 101 so that the left and right regions, sandwiching the treated water tank 160, are connected at the lower region. The lower region of the aerobic treatment tank 150 is connected to the treated water tank 160.

[0028] An aerobic filter bed section 151, on which aerobic microorganisms that aerobically decompose (aerobic treatment) organic pollutants in the water being treated are attached, is provided in the aerobic treatment tank 150. The aerobic filter bed section 151 has a reticulated block filter bed 151a and a reticulated granular filter bed 151b. The reticulated block filter bed 151a is located in an area above the reticulated granular filter bed 151b.

[0029] The reticulated block filter bed 151a is composed of a single, mesh-like, block-shaped filter material. Specifically, the block-shaped filter material is a mesh of wires made of resin such as polypropylene or polyethylene intertwined in a three-dimensional manner, and is integrally molded into a block shape. The reticulated block filter bed 151a functions as a lid to prevent the multiple filter materials in the lower reticulated granular filter bed 151b from leaking out. The reticulated block filter bed 151a is held in place by a holding member such as a net or plate-shaped member supported by the treatment tank main body 101. The aerobic filter material of the reticulated block filter bed 151a may be molded into other shapes, such as a plate, as long as it is an integrally molded filter material.

[0030] The reticulated granular filter bed 151b is constructed by packing a plurality of reticulated roll-shaped filter materials into a predetermined area. Specifically, the reticulated roll-shaped filter material is a mesh body in which wires made of resin such as polypropylene or polyethylene are entangled three-dimensionally, and is formed into a cylindrical shape with a diameter of approximately 100 mm and a length of approximately 100 mm. The filter material of the reticulated granular filter bed 151b may be a reticulated, spherical, or plate-shaped filter material, or a filter material formed from a porous material.

[0031] An air diffuser 152 is provided in the lower region of the aerobic treatment tank 150, i.e., the region below the reticulated granular filter bed 151b. Air (oxygen) supplied from the air diffuser 152 is supplied sequentially to the reticulated granular filter bed 151b and the reticulated block filter bed 151a. As a result, the water to be treated in the aerobic treatment tank 150 is aerobically treated by the air supplied from the air diffuser 152. The aerobically treated water to be treated moves from the lower region of the aerobic treatment tank 150 to the treated water tank 160. A holding frame 153 that holds the lower end region of the aerobic treatment tank 150 is provided at the same height as the aeration device 152 .

[0032] As shown in FIGS. 1 and 2, a first air lift pump 191 is provided in the treatment water tank 160. The suction section of the first air lift pump 191 is provided in a lower region of the treatment water tank 160. A portion of the water to be treated, which is transferred from the aerobic treatment tank 150 to the treatment water tank 160 via the first air lift pump 191, is taken in from the suction section in a region where the water is advected into the treatment water tank 160, and is returned to the inflow baffle 110 via the return path 191a. As a result, the water to be treated in the water treatment device 100 is configured to circulate through the inflow baffle 110, the sedimentation tank 120, the anaerobic treatment tank 140, and the aerobic treatment tank 150. In view of this, the first air lift pump 191 can be referred to as a "circulation pump."

[0033] 1 and 2, a disinfection tank 170 partitioned by a partition wall 171 is provided in the upper region of the treatment water tank 160. The partition wall 171 is defined as a disinfection tank-constituting wall. The treatment water tank 160 is also provided with a second air lift pump 192 for transferring the water to be treated in the treatment water tank 160 to the disinfection tank 170, where it is disinfected and then discharged to the outside. In view of this, the second air lift pump 192 can be called the "discharge pump." As shown in Figure 5, the second air lift pump 192 is mainly composed of a U-shaped tubular pump body 193, an intake section 194 that draws in the water to be treated in the treatment water tank 160, and a discharge section 195 that discharges the water to be treated into the disinfection tank 170.

[0034] The air diffuser 152, the first air lift pump 191, the second air lift pump 192, and the return line 191a are all arranged in the treatment tank main body 101 in a connected, integrated manner, mainly made of resin pipe material. The first air lift pump 191, the second air lift pump 192, and the air diffuser 152 are connected to a predetermined air supply device (not shown for convenience), and the supply and cut-off of air is switched by opening and closing an air valve. The air valve is controlled by a controller (not shown) or manually.

[0035] 3 is a block diagram showing the treatment routines of each treatment tank according to this embodiment. Specifically, in the water treatment device 100, the water to be treated flows into the treatment tank body 101 through the inlet pipe 102, undergoes predetermined treatments in the inlet baffle 110, the sedimentation tank 120, the anaerobic treatment tank 140, the aerobic treatment tank 150, the treated water tank 160, and the disinfection tank 170, and is then discharged to the outside through the outlet pipe 103. A portion of the water to be treated that has been aerobically treated in the aerobic treatment tank 150 is returned from the treated water tank 160 to the inlet baffle 110 by the first air lift pump 191 and is treated again. This results in a further reduction in BOD (biochemical oxygen demand) and further removal of SS (suspended solids).

[0036] The water to be treated stored in the treatment water tank 160 is actively transported to the disinfection tank 170 by the second air lift pump 192, and after being disinfected, is discharged to the outside through the outflow pipe 103. The "active transport" by the second air lift pump 192 refers to a mode in which the treated water is transported by imparting kinetic energy to the treated water using a fluid machine, regardless of the water level, as opposed to a state in which the treated water is naturally transported to the disinfection tank 170 depending on the water level.

[0037] (About disinfection tank 170) Next, the structure of the disinfection tank 170, which is one of the features of this embodiment, will be described in detail with reference to FIGS. As described above, the disinfection tank 170 is located in the upper region of the treated water tank 160, and is a treatment tank for disinfecting the treated water transported via the second air lift pump 192 and discharging it outside the water treatment device 100. The detailed configuration of the disinfection tank 170 is shown in Figures 4 and 5. In each figure, since the disinfection tank 170 is disposed in the region above the treatment water tank 160, when illustrating the configuration of only the disinfection tank, for convenience, the treatment water tank 160 is indicated by adding a symbol to the spatial region on the paper. The disinfection tank 170 is partitioned by partition walls (disinfection tank constituent walls) 171, and generally comprises a cartridge placement section 172 and a water-to-be-treated retention section 174 that are integrally connected together.

[0038] The cartridge placement section 172 has a recessed section 172a that is open at the top, and cartridge 180 is placed in this recessed section 172a. The cartridges 180 are three adjacently arranged cylindrical bodies of the same type (first cartridge 180a, second cartridge 180b, and third cartridge 180c). In other words, in this embodiment, three cartridges 180 of the same type are used. A second air lift pump 192 is arranged adjacent to cartridge placement section 172. The water to be treated can flow into recessed section 172a via second air lift pump 192, and the water to be treated that has flowed into recessed section 172a can come into contact with the lower end of cartridge 180.

[0039] Untreated water retention section 174 is formed as a recessed space that is vertically deeper than recessed section 172a, and the untreated water after disinfection treatment can be retained in this recessed space. Furthermore, a discharge opening 175 is formed in the upper region of untreated water retention section 174, and when the water level of the untreated water in untreated water retention section 174 reaches discharge opening 175, the untreated water in untreated water retention section 174 can flow out of disinfection tank 170 through discharge opening 175. Discharge opening 175 is connected to outflow pipe 103 shown in FIGS. 1 and 2, and the water to be treated is discharged to the outside of water treatment device 100. It is also possible to provide another tank downstream of the disinfection tank 170, such as a discharge pump tank in which a discharge pump is installed.

[0040] A bent plate-shaped baffle section 173 is provided between cartridge arrangement section 172 and untreated water retention section 174. This baffle section 173 prevents the untreated water that has flowed into recessed section 172a of cartridge arrangement section 172 from immediately moving to untreated water retention section 174, and is configured to temporarily retain in recessed section 172a to ensure contact time with cartridge 180. As shown in Figure 8, which illustrates the disinfection tank 170 in a plan view, the baffle section 173 is formed with a communication opening 173a, and the water to be treated that has been sufficiently disinfected moves through this communication opening 173a to the water to be treated retention section 174.

[0041] FIG. 6 shows a detailed configuration of the cartridge 180 as a front view. The drug barrel 180 is formed as a long, hollow cylindrical body, and has a drug barrel main body 181, a dissolution amount adjusting portion 182, and a disinfectant exposure portion 184. The cartridge body 181 is configured so that the hollow internal space can accommodate a disinfectant 183. In this embodiment, the disinfectant 183 is configured by sequentially stacking a plurality of sodium hypochlorite tablets (chemicals) (in this embodiment, a maximum of 12 cylindrical tablet chemicals with a diameter of 80 mm and a height of 30 mm can be filled), and the lowest tablet of the disinfectant 183 is placed in a state facing the outside from a disinfectant exposure portion 184, and is allowed to come into contact with the water to be treated. The exposed area of ​​the disinfectant exposed portion 184 to the outside can be adjusted arbitrarily by operating the dissolution amount adjustment portion 182. Specifically, the opening area of ​​the disinfectant exposed portion 184 is changed by rotating the dissolution amount adjustment portion 182 around the longitudinal axis direction of the cartridge 180. If the opening area of ​​the disinfectant exposed portion 184 is increased, the exposed area to the water to be treated increases, thereby promoting dissolution of the disinfectant. On the other hand, if the opening area of ​​the disinfectant exposed portion 184 is decreased, the exposed area to the water to be treated decreases, thereby restricting dissolution of the disinfectant.

[0042] FIG. 7 is a schematic front view showing the state in which the water to be treated is transferred from the treatment water tank 160 to the disinfection tank 170 by the second air lift pump 192. As mentioned above, the flow of the water to be treated is indicated by arrows in the drawings. The suction section 194 of the second air lift pump 192 is located in the treatment water tank 160 at approximately the same level as the bottom of the disinfection tank 170. On the other hand, the discharge section 195 is located a predetermined distance above the suction section 194, and the difference in height therebetween is the head.

[0043] 8 is a schematic plan view showing the state in which the water to be treated is transferred from the treatment water tank 160 to the disinfection tank 170 by the second air lift pump 192 and flows within the disinfection tank 170. As in FIG. 7, the flow of the water to be treated is indicated by arrows in the drawing. The treated water sent from the discharge port 195 of the second air lift pump 192 to the disinfection tank 170 comes into contact with the inner wall surface of the partition wall 171 in the recessed portion 172a, and its flow direction is changed by the inner wall surface before it heads toward the cartridge 180 inside the recessed portion 172a. In other words, the water to be treated in the disinfection tank 170 flows in a first direction from the discharge portion 195 of the second air lift pump 192 toward the partition wall 171, is reflected by the partition wall 171, and is converted into a second direction (different from the first direction) from the partition wall 171 toward the cartridge 180.

[0044] In this embodiment, the area in the partition wall 171 that changes the flow direction of the water to be treated forms the disinfection tank 170 and also functions as a baffle section 171a (baffle plate or baffle wall) that serves as a mechanism for changing the flow direction of the water to be treated. That is, the baffle portion 171a formed by the partition wall 171 is a constituent member of the disinfection tank 170, and is an element member that corresponds to the "baffle portion" of the present invention. In this embodiment, the partition wall 171 of the disinfection tank 170, that is, the tank wall, is used to change the direction of the water to be treated, but a baffle member may be provided separately from the partition wall 171. In this case, a flat baffle plate, a curved baffle plate, or a combination thereof can be appropriately used.

[0045] By changing the flow direction of the water to be treated from the first direction to the second direction, the water to be treated reaches the cartridge 180 at a reduced flow rate (a state in which the water force is reduced). Therefore, the flow rate of the water to be treated when it comes into contact with the disinfectant exposed portion 184 of the cartridge 180 shown in Fig. 6 is reduced significantly compared to when the water flows directly from the discharge portion 195 of the second air lift pump 192 to the cartridge 180 (without changing direction).

[0046] As a result, the treated water comes into relatively "gentle" contact with the disinfectant 183, which prevents the dissolution rate of the disinfectant 183 from increasing unnecessarily, thereby optimizing the control of the consumption of the disinfectant 183. From the viewpoint of the consumption control, it is preferable that the change in direction from the first direction to the second direction be 90 degrees or more in order to sufficiently decelerate the water to be treated. For example, in this embodiment, as shown in Fig. 8, the water to be treated discharged to the left in the drawing abuts against the baffle portion 171a (i.e., the partition wall 171), changes direction at an angle of 90 degrees or more, is significantly decelerated, and flows gently to the upper right in the drawing to reach the cartridge 180. In other words, in this embodiment, the left direction in the drawing is set as the first direction, and the upper right direction in the drawing is set as the second direction.

[0047] 8, the water to be treated, whose flow direction has been changed from the first direction to the second direction in the disinfection tank 170, will, due to the position of the direction change, come into contact (in terms of time or flow rate) sequentially with the first cartridge 180a (left side in the figure), the second cartridge 180b (center in the figure), and the third cartridge 180c (right side in the figure) among the multiple cartridges 180. This makes it possible to appropriately adjust the dissolution rate of the disinfectant 183 in each cartridge 180 and to finely adjust the consumption control of the disinfectant 183 in the multiple cartridges 180 as a whole. For example, in the first cartridge 180a, which is closest to the direction change position, the dissolution rate is set relatively low (the opening area of ​​the disinfectant exposed portion 184 is set relatively small), and in the third cartridge 180c, which is farthest from the direction change position, the flow distance of the treated water is longer and the water flow is expected to be even slower, so the dissolution rate can be set relatively higher than that of the first cartridge 180a (the opening area of ​​the disinfectant exposed portion 184 is set relatively large), and the second cartridge 180b can be set to an intermediate level between the two.

[0048] 9, the water to be treated that has been disinfected through cartridge 180 moves through baffle section 173 to untreated water retention section 174 in disinfection tank 170. When the water reaches the water level of discharge opening 175 in untreated water retention section 174, the water flows out of disinfection tank 170 from discharge opening 175 and is then discharged out of water treatment device 100 through outlet pipe 103 shown in FIGS.

[0049] In this embodiment, in the water treatment device 100, a configuration is adopted in which the second air lift pump 192 is used to actively transfer the water to be treated from the upstream treatment tank, the treated water tank 160, to the disinfection tank 170.In order to address the concern that a problem that may arise from this active transfer, namely that the speed at which the water to be treated is transported to the disinfection tank 170 is too fast and the rate at which the disinfectant dissolves is unnecessarily increased, a configuration is adopted in which the flow direction of the water to be treated is changed and slowed down before it comes into contact with the cartridge 180, thereby making it possible to eliminate such concerns. In particular, although the water treatment device 100 undergoes periodic maintenance inspections, it is common for the device to be left as is until the next inspection, and it is therefore important to avoid the disinfectant being consumed more quickly than expected. In this embodiment, such a problem can be prevented in advance, which is beneficial from the perspective of reducing the environmental load. Moreover, in the water treatment device 100 of this embodiment, the partition wall 171 that constitutes the disinfection tank 170 itself is used as the mechanism for changing the flow direction of the water to be treated, so there is no need to prepare a dedicated component for changing the direction, and an excellent configuration is obtained in terms of rationalizing the component configuration.

[0050] Furthermore, if the only method is to reduce the flow velocity of the water to be treated, it is possible to use a means such as providing an overflow wall on the flow path of the water to be treated, but in this case, it is necessary to secure independent flow paths of predetermined lengths before and after the overflow in the flow direction of the water to be treated, which is wasteful in terms of space efficiency.In this embodiment, by adopting a configuration that reduces the flow velocity of the water to be treated by changing the flow direction of the water to be treated (especially by changing the direction by 90 degrees or more), space saving in the disinfection tank 170 is also ensured.

[0051] The water treatment device 100 of this embodiment is designed to treat wastewater, and even if, for example, stagnation occurs in part of the water to be treated in the disinfection tank 170 and the flow is partially stagnated, the effect can be fully achieved as long as, from a global perspective, the flow direction of the water to be treated is changed from the first direction to the second direction by the baffle section 171a.

[0052] The water treatment device 100 according to this embodiment can prevent adverse effects that arise as a trade-off when actively supplying treated water to the disinfection tank 170, and provides a concrete technology for such active supply.

[0053] In the above embodiment, the water treatment device 100 is provided with an air lift pump, but a fluid machine other than the air lift pump, such as a submersible pump, may also be installed. In this case, for example, the controller may be configured to control the amount of water to be treated transferred by the submersible pump in response to fluctuations in the water level.

[0054] Furthermore, the water treatment device 100 according to the above embodiment has the treatment elements of the inflow baffle 110, the sedimentation 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, but the number and types of treatment elements can be selected as needed.

[0055] In the above embodiment, the water treatment device 100 was described as an example of treating raw water discharged from ordinary households, apartment buildings, etc., but the present invention can also be applied to water treatment devices that treat raw water discharged from facilities such as commercial facilities, public facilities, factories, etc., in addition to ordinary households and apartment buildings.

[0056] (Correspondence between each component of the embodiment and each component of the present invention) The above embodiment shows an example of a form 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 inflow baffle 110 is an example of a configuration that corresponds to the "inflow tank" of the present invention. The settling separation tank 120 is one example of a configuration that corresponds to the "inflow tank" of the present invention. The anaerobic treatment tank 140 is an example of a configuration that corresponds to the "anaerobic treatment tank" of this invention. The aerobic treatment tank 150 is an example of a configuration that corresponds to the "aerobic treatment tank" of the present invention. The treatment water tank 160 is an example of a configuration that corresponds to the "treatment water tank" of the present invention. Disinfection tank 170 is an example of a configuration that corresponds to "disinfection tank" of the present invention. The baffle portion 171a is an example of a configuration that corresponds to "a baffle portion" of the present invention. The cartridge 180 (180a, 180b, 180c) is an example of a configuration that corresponds to "the cartridge" of this invention. The second air lift pump 192 is an example of a configuration that corresponds to the "untreated water transfer pump" of the present invention. [Explanation of symbols]

[0057] 100 Water treatment equipment 101 Treatment tank body 101a side wall 101b side wall 101c side wall 101d side wall 101e bottom wall 101f upper wall 102 Inflow pipe 103 Outflow pipe 104 Manhole Section 105 Bulkhead 105a opening 106 Bulkhead 106a opening 107 Advection Baffle 108 Advection Baffle 110 Inlet baffle 120 Sedimentation tank 140 Anaerobic treatment tank 141 Anaerobic filter bed 150 Aerobic treatment tank 151 Aerobic filter bed 151a Reticulated block filter bed 151b Reticulated Granular Filter Bed 152 Air diffuser 153 Retaining Frame 160 Treatment tank 170 Disinfection tank 171 Partition wall (disinfection tank component wall) 171a Baffle section (baffle plate, baffle wall) 172 Cartridge arrangement part 172a Concave part 173 Baffle section 174 Treated water retention area 175 Discharge opening 180(180a, 180b, 180c) cartridge 181 Medicine barrel body (disinfectant storage section) 182 Dissolution amount adjustment section 183 Disinfectants (medicines, tablets) 184 Disinfectant-exposed area 191 No. 1 Air Lift Pump (Circulation Pump) 191a Return Route 192 No. 2 air lift pump (discharge pump) 193 Pump body 194 Suction part 195 Discharge part

Claims

1. A water treatment device that treats water to be treated that contains sludge, an inflow tank into which the water to be treated flows; an anaerobic treatment tank provided downstream of the inflow tank and performing anaerobically treating the water to be treated; an aerobic treatment tank provided downstream of the anaerobic treatment tank and performing aerobically treating the water to be treated; a disinfection tank provided downstream of the aerobic treatment tank for disinfecting the water to be treated; a baffle portion provided in the disinfection tank; A cartridge arranged in a cartridge chamber in the disinfection tank, containing a disinfectant for disinfecting the water to be treated, and configured so that the disinfectant dissolves in the water to be treated by contacting the water to be treated; a water-to-be-treated transfer pump for transferring the water to be treated to the disinfection tank, The water-to-be-treated transfer pump discharges the water to be treated in a predetermined first direction in the disinfection tank, and the baffle unit converts the flow direction of the water to be treated in the disinfection tank to a second direction different from the first direction, and supplies the water to the cartridge in a state where the flow rate of the water to be treated is reduced. A water treatment device, characterized in that a side wall of the cartridge chamber functions as the baffle portion.

2. 2. The water treatment device according to claim 1, wherein the angle at which the flow direction of the water to be treated is changed by the baffle portion is set to 90 degrees or more.

3. The water treatment device according to claim 1 or 2, A treated water tank is provided downstream of the aerobic treatment tank and upstream of the disinfection tank, The water treatment device, wherein the untreated water transfer pump is configured to transfer the untreated water in the treatment water tank to the disinfection tank.

4. The water treatment device according to any one of claims 1 to 3, The water treatment device is characterized in that the chemical cylinder is composed of a plurality of cylindrical bodies containing disinfectants for disinfecting the water to be treated, and the water to be treated, whose flow direction has been changed by the baffle section, is sent sequentially to the plurality of cylindrical bodies.

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