JP6874435B2 - Wastewater treatment equipment - Google Patents

Description

The present disclosure relates to a wastewater treatment apparatus that decomposes an object to be treated contained in wastewater by microorganisms.

Conventionally, as a technique for purifying an object to be treated contained in wastewater, an activated sludge treatment device equipped with a reaction tank and a settling basin has been used. The reaction tank holds activated sludge. When wastewater is supplied to the reaction tank, the activated sludge decomposes the object to be treated in the wastewater and purifies the wastewater. The wastewater (treated water) purified in the reaction tank is supplied to the settling basin together with activated sludge. The sedimentation basin sediments and separates activated sludge from the treated water. The treated water from which the activated sludge is separated in the settling basin is discharged. On the other hand, the activated sludge settled and separated in the settling basin is returned to the reaction tank and reused.

In recent years, the concentration of the object to be treated in wastewater has been increasing, and it has been desired to improve the treatment capacity of the activated sludge treatment apparatus. In the above-mentioned conventional activated sludge treatment apparatus, when trying to improve the treatment capacity, two configurations are conceivable: a configuration in which the capacity of the reaction vessel is increased, and a configuration in which the concentration of activated sludge in the reaction vessel is increased. However, in the case of the former configuration, there is a problem that the installation location is limited. Further, in the latter configuration, since the sedimentation separation of the activated sludge in the sedimentation basin depends on gravity, the concentration of the activated sludge to be returned cannot be increased more than a predetermined value. In addition, if the return flow rate is increased, the load on the sedimentation basin becomes excessive, so there is a limit to improving the concentration of activated sludge in the reaction vessel.

Therefore, a membrane separation active sludge treatment device that immerses a microfiltration membrane with a pore size of 0.1 μm to 0.4 μm in a reaction vessel and sucks and discharges the liquid (filtrate) filtered by the microfiltration membrane with a pump. It has been developed (for example, Patent Document 1). In the membrane separation activated sludge treatment apparatus, most of the activated sludge can be retained in the reaction vessel to increase the concentration by the microfiltration membrane. Therefore, the membrane separation activated sludge treatment apparatus can reduce the number of settling basins while improving the treatment capacity as compared with the conventional activated sludge treatment apparatus.

Japanese Patent No. 4277335

However, the above-mentioned conventional membrane separation activated sludge device has a problem that the cost of the microfiltration membrane itself is high. Further, since the hole diameter is small, clogging is likely to occur, and it is necessary to frequently perform cleaning for clearing the clogging, which causes a problem that running cost is high.

In view of such problems, it is an object of the present disclosure to provide a wastewater treatment apparatus capable of purifying an object to be treated at low cost.

In order to solve the above problems, the wastewater treatment apparatus according to one aspect of the present disclosure is formed at one end of a treatment water tank containing wastewater and microorganisms and one end of the treatment water tank, or above one end of the treatment water tank. The inlet provided in the water tank, the outlet formed at the other end of the treated water tank, the rectangular bottom surface portion, the side surface portion formed with one or more notches, and the surface direction of the side surface portion are orthogonal to each other. A section provided in the treatment water tank, which has a discharge port which is provided at a position where the water is discharged and is communicated with the outlet, and has a rectangular tube-shaped side wall portion which stands vertically upward from the bottom surface portion. A water channel, a support having two sides facing each other that extend vertically and have one or more through holes, and a bottom surface that seals the lower part of the two sides, and the two sides. One or more filter modules arranged on the outer surface and having a plurality of through holes through which the drainage passes, and a outlet for guiding the drainage that has passed through the filter to the outlet. plane direction of said filter, from said inlet so as to intersect with the waste water stream towards the said outlet, and a holding portion for holding the support of the filter module in the processing water tank, the The holding portion is composed of a frame body protruding outward from the side surface portion from the notch in the compartmentalized water channel, and the support of the filter module has such that the outlet is located in the compartmentalized waterway. Ru is fitted to the frame.

Further, an elastic filler may be provided between the frame body and the support body.

Further, a partition wall provided between the inlet and the outlet of the treated water tank and dividing the inside of the treated water tank into an upstream region and a downstream region, and a communication formed in the partition wall. A port may be provided, and at least a part of the compartmentalized waterway may be provided in the upstream region, and the outlet of the compartmentalized waterway may be communicated with the outlet through the communication port.

Further, instead of the filter module, a sealing portion for sealing the notch may be provided.

Further, it may be provided below the filter module in the treated water tank and provided with an air diffuser for supplying gas.

Further, the air diffuser may be provided in the treated water tank at a position different from that of the filter module in the horizontal direction.

Further, the filter may be made of a woven fabric having an opening of 10 μm or more and 200 μm or less.

Moreover, the said microorganism may be activated sludge.

It is possible to purify the object to be treated at low cost.

It is a figure explaining the wastewater treatment system. It is a perspective view of the wastewater treatment apparatus. FIG. 3A is a diagram illustrating a partition wall. FIG. 3B is a diagram illustrating a support plate. FIG. 4A shows a perspective view of the compartmentalized channel. FIG. 4B shows a perspective view of the compartmentalized channel and the holding portion. FIG. 4C shows a top view of the compartmental channel and the holding portion. FIG. 5A is a perspective view of the filter module. FIG. 5B is a diagram illustrating attachment of the filter module to the holding portion. FIG. 5C is a top view of the filter module. FIG. 6A is a perspective view of the sealing portion. FIG. 6B is a top view of the sealing portion.

The embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding, and the present disclosure is not limited unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are designated by the same reference numerals, so that duplicate description will be omitted. In addition, elements not directly related to the present disclosure are not shown.

(Wastewater treatment system 100)
FIG. 1 is a diagram illustrating a wastewater treatment system 100. As shown in FIG. 1, the wastewater treatment system 100 includes a wastewater treatment device 110 and a settling basin 120. The wastewater treatment device 110 is, for example, an activated sludge treatment device that decomposes organic substances (objects to be treated) contained in wastewater such as sewage with activated sludge. The settling basin 120 setstles and separates the activated sludge contained in the treated water flowing out from the wastewater treatment device 110. The purified water from which the activated sludge has been removed in the settling basin 120 is discharged. In addition, the activated sludge (surplus sludge) settled and separated in the settling basin 120 is discarded. Hereinafter, a specific configuration of the wastewater treatment device 110 will be described.

(Wastewater treatment device 110)
FIG. 2 is a perspective view of the wastewater treatment device 110. In the following figures including FIG. 2 of the present embodiment, the X-axis (horizontal direction), the Y-axis (horizontal direction), and the Z-axis (vertical direction) that intersect vertically are defined as shown in the figure. Further, for easy understanding, the liquid level (interface between liquid and gas) is shown by a alternate long and short dash line in FIG.

As shown in FIG. 2, the wastewater treatment device 110 includes a treatment water tank 210, an introduction pipe 220, an outflow pipe 230, a partition wall 240, a support plate 250, a partition water channel 260, a holding portion 270, and a filter module. 280 and an air diffuser unit 290 are included.

The treatment water tank 210 includes a rectangular bottom surface 212 and four side walls 214a to 214d erected from the four sides of the bottom surface 212, respectively. The treatment water tank 210 accommodates activated sludge flocs and wastewater. The introduction pipe 220 is a pipe in which one end is connected to a wastewater supply source and the inflow port 222 at the other end faces the inside of the treatment water tank 210. The inflow port 222 is located in the vicinity of the side wall 214a of the treated water tank 210. The waste water is introduced into the treatment water tank 210 through the introduction pipe 220. The amount of drainage supplied from the inflow port 222 is adjusted so that the water surface is located between the upper end and the lower end of the filter module 280, which will be described later.

The outflow pipe 230 is a pipe connected to the outflow port 232. The outflow port 232 is formed on the side wall 214b facing the side wall 214a in the treated water tank 210. The treated water purified in the treated water tank 210 is supplied to the settling basin 120 through the outflow pipe 230.

The partition wall 240 is provided between a portion (side wall 214a) facing the inflow port 222 and an outflow port 232 (side wall 214b) in the treatment water tank 210. The partition wall 240 is a plate extending vertically (Z-axis direction in FIG. 2) from the bottom surface 212 to the upper end of the treatment water tank 210 and extending from the side wall 214c to the side wall 214d. The inside of the treated water tank 210 is divided into an upstream area 210A and a downstream area 210B by the partition wall 240. The upstream region 210A is arranged on the upstream side in the flow direction of wastewater or treated water. The downstream region 210B is arranged on the downstream side in the flow direction of wastewater or treated water. The volume of the downstream region 210B is smaller than the volume of the upstream region 210A.

The support plate 250 is provided between the side wall 214a (where the inflow port 222 faces) in the treatment water tank 210 and the partition wall 240. The support plate 250 is a plate extending downward from the upper end of the treatment water tank 210 in the vertical direction (Z-axis direction in FIG. 2) and extending from the side wall 214c to the side wall 214d. However, the lower end of the support plate 250 is separated from the bottom surface 212 of the treatment water tank 210. The support plate 250 is provided parallel to the partition wall 240.

FIG. 3A is a diagram illustrating the partition wall 240. FIG. 3B is a diagram illustrating the support plate 250. As shown in FIG. 3A, the partition wall 240 is formed with a communication port 242 cut out downward from the upper end of the partition wall 240. The communication port 242 has a U-shape. The communication port 242 is provided unevenly toward the side wall 214c side from the center.

Further, as shown in FIG. 3B, the support plate 250 is provided with a notch 252 from the upper end of the support plate 250 downward. The notch 252 has the same shape and size as the communication port 242, and its position corresponds to the communication port 242 in the Y-axis direction. That is, the communication port 242 and the notch 252 are provided at the same positions when viewed from the Y-axis direction in FIG. 3 (Y-axis direction in FIG. 2). The communication port 242 and the notch 252 are opened upward.

Returning to FIG. 2, the compartmentalized water channel 260 is arranged in the treatment water tank 210. FIG. 4 is a diagram illustrating a compartmentalized channel 260 and a holding portion 270. FIG. 4A shows a perspective view of the compartmentalized waterway 260. FIG. 4B shows a perspective view of the compartmentalized channel 260 and the holding portion 270. FIG. 4C shows a top view of the compartmentalized channel 260 and the holding portion 270.

As shown in FIG. 4A, the partition channel 260 includes a bottom surface portion 262, a side wall portion 264, and a reinforcing member 266. The bottom surface portion 262 is a rectangular plate member. The side wall portion 264 is a square tubular member erected vertically above the bottom surface portion 262. The upper surface of the compartmental channel 260 is open.

The side surface portion 264a constituting the side wall portion 264 stands upright from the side of the bottom surface portion 262 in the lateral direction. The side surface portion 264a is provided in parallel with the side walls 214a and 214b of the treatment water tank 210. A discharge port 268a is formed at a position facing the side surface portion 264a. The side surface portion 264b constituting the side wall portion 264 stands upright from the side in the longitudinal direction of the bottom surface portion 262. The side surface portion 264b is provided parallel to the side wall 214c of the treatment water tank 210. The side surface portion 264b is orthogonal to the side surface portion 264a. In other words, the discharge port 268a is formed at a position orthogonal to the surface direction of the side surface portion 264b. A plurality of (here, six) notches 268b are formed in the side surface portion 264b. The notch 268b is formed downward from the upper end of the side surface portion 264b. The notch 268b has a U-shape and is open upward.

The reinforcing member 266 is composed of a plate member extending in the Y-axis direction in FIG. 4A. The reinforcing member 266 is provided on the back surface side of the upper portion of the side surface portion 264b. The reinforcing member 266 is provided over a plurality of notches 268b. By providing the reinforcing member 266, it is possible to reinforce the portion of the side surface portion 264b located between the adjacent notches 268b.

As shown in FIG. 4B, the holding portion 270 includes a frame body 272. The frame body 272 is fitted into the notch 268b. The frame body 272 is provided so as to project outward from the side surface portion 264b from the notch 268b. The frame body 272 includes a bottom surface 272a and side surfaces 272b and 272c. The bottom surface 272a of the frame body 272 abuts on the bottom surface portion 262 that partitions the notch 268b. The side surfaces 272b and 272c of the frame body 272 abut on the side surface portion 264b that partitions the notch 268b. Further, the upper ends of the side surfaces 272b and 272c abut on the lower surface of the reinforcing member 266. The edge of the frame body 272 inside the compartmentalized waterway 260 protrudes from the reinforcing member 266 to the inside of the compartmentalized waterway 260.

As shown in FIG. 4C, the support member 274 is connected to the partition wall 240 and the support plate 250. As will be described in detail later, the support member 274 is a rod member having an L-shaped XZ cross section in FIG. 4 (c).

Further, as shown in FIG. 4C, in the compartmentalized waterway 260, the bottom surface portion 262, the side surface portion 264b, and the side surface portion 264c facing the side surface portion 264b are the edges of the communication port 242 of the partition wall 240. It is provided so as to be in contact with the edge of the notch 252 of the support plate 250. That is, the partition channel 260 is supported by the partition wall 240 and the support plate 250. Further, the partition channel 260 is supported so that the discharge port 268a is located in the downstream region 210B. Therefore, the compartmental channel 260 is provided over the upstream region 210A and the downstream region 210B. Further, the compartmentalized waterway 260 is provided unevenly toward the side wall 214c side from the center.

Returning to FIG. 2, the filter module 280 is connected to the partition channel 260 by the holding portion 270. FIG. 5 is a diagram illustrating the filter module 280. FIG. 5A is a perspective view of the filter module 280. FIG. 5B is a diagram illustrating attachment of the filter module 280 to the holding portion 270. FIG. 5C is a top view of the filter module 280. In FIG. 5C, the support plate 250 is omitted for ease of understanding.

As shown in FIG. 5A, the filter module 280 includes a support 310, a filter 320, and an outlet 330. The support 310 is made of plastic (eg, vinyl chloride). The support 310 has a U-shaped horizontal cross section (XY cross section in FIG. 5A), and the upper surface is open. The support 310 includes side surfaces 312, 314, 316, a bottom surface 318, and a reinforcing plate 310b. The side surface 312 and the side surface 314 extend in the vertical direction (Z-axis direction in FIG. 5) to form an XZ plane. The side surface 312 and the side surface 314 face each other. A plurality of through holes 310a are formed on the side surfaces 312 and 314. The diameter of the through hole 310a is about 10 mm to 20 mm. The side surface 316 extends in the vertical direction to form a YZ plane, and is continuous with the side surfaces 312 and 314. The bottom surface 318 seals the lower part of the side surfaces 312 and 314. The reinforcing plate 310b is arranged between the side surfaces 312 and 314. A through hole 310a is also formed in the reinforcing plate 310b.

The filter 320 is made of a woven fabric having a plurality of through holes formed therein. The through hole (opening) of the filter 320 is larger than the pore diameter of the microfiltration membrane. The opening of the filter 320 is, for example, in the range of 10 μm or more and 200 μm or less. The opening of the filter 320 is preferably in the range of 20 μm or more and 50 μm or less. The opening of the filter 320 is almost constant regardless of the site. That is, the filter 320 has a uniform opening. The fibers forming the filter 320 are one layer, and there are no complicated gaps unlike non-woven fabric. The fibers forming the filter 320 are made of resin and are made of, for example, one or more selected from the group of polyester, polyethylene, and nylon. Further, the filter 320 is provided on the outer surface of the side surfaces 312 and 314 so as to cover the through hole 310a. The filter 320 is attached to, for example, the side surfaces 312 and 314 with an adhesive.

The space between the edge portions 312a and 314a where the side surfaces 316 on the side surfaces 312 and 314 are not continuous functions as an outlet 330 described later.

Further, a filler 340 is provided on the outer surface of the end portion on the side surface 312, 314 on the side of the outlet 330 side. The filler 340 is composed of a member having elasticity (elasticity) (for example, a porous resin such as a sponge, a silicon rubber sheet, felt, etc.). The filler 340 is attached to the side surfaces 312 and 314 with an adhesive.

The filter module 280 is connected to the compartmentalized channel 260 by a holding unit 270. Specifically, as shown in FIGS. 5 (b) and 5 (c), the side surfaces 312 and 314 that partition the outlet 330 of the filter module 280 are inserted into the frame body 272. That is, the support 310 of the filter module 280 is fitted to the frame 272 so that the outlet 330 is located in the compartmentalized waterway 260. Further, the side surface 316 of the filter module 280 is placed on the bottom surface 272a of the frame body 272 and the support member 274 (see FIG. 5C). Therefore, the filter 320 is arranged in a direction in which the surface direction is orthogonal to the side surface portion 264b of the compartmentalized water channel 260.

Then, as shown by an arrow in FIG. 5 (c), the drainage (treated water) of the upstream region 210A is the filter 320, the outlet 330, the compartmentalized water channel 260, and the discharge port 268a (communication port 242) in this order. Will pass through and lead to the downstream region 210B.

As described above, the filler 340 is provided on the outer surface of the end portion on the side surface 312, 314 on the side of the outlet 330. Therefore, when the filter module 280 is fitted to the frame body 272, the filler 340 is arranged between the frame body 272 and the support body 310. As a result, the gap formed between the side surfaces 312 and 314 and the frame body 272 can be sealed with the filler 340. Therefore, all the treated water in the upstream region 210A can be passed through the filter 320. Further, the filler 340 has elasticity (elasticity). Therefore, the filler 340 can absorb the rattling of the filter module 280 with respect to the holding portion 270. Therefore, the filter module 280 can be stably fixed to the holding portion 270.

In the process of the treated water passing through the filter 320, the activated sludge contained in the treated water is captured by the filter 320 (upstream side region 210A side). Therefore, the treated water that has passed through the filter 320 contains almost no activated sludge. Then, the treated water guided to the downstream region 210B is supplied to the settling basin 120 through the outflow port 232.

Returning to FIG. 2, the air diffuser unit 290 includes an air diffuser 292 and a gas pipe 294. The air diffuser 292 is provided near the bottom surface 212 (below the filter module 280) of the upstream region 210A in the treated water tank 210. In the present embodiment, the air diffuser 292 is provided on the side wall 214d of the bottom surface 212 facing the side wall 214c. That is, the air diffuser 292 is provided in the treatment water tank 210 at a position different from that of the filter module 280 in the horizontal direction (X direction in FIG. 2). One end of the gas pipe 294 is connected to the air diffuser 292. A blower (not shown) is connected to the other end of the gas pipe 294. The blower blows air into the gas pipe 294. Then, air (oxygen) is supplied into the upstream region 210A through the air diffuser 292. Further, the inside of the upstream region 210A is agitated by the air supplied by the air diffuser 292. Therefore, the air diffuser 292 creates a swirling flow in the vertical direction (indicated by an arrow in FIG. 2) in the upstream region 210A. As a result, the inside of the upstream region 210A is more agitated.

By supplying air to the air diffuser 292, it is possible to promote the decomposition of organic matter by the activated sludge contained in the upstream region 210A. Further, the activated sludge can be grown by supplying air to the air diffuser 292. Further, the activated sludge and oxygen can be efficiently brought into contact with each other by stirring the inside of the upstream region 210A by the air diffuser 292. This makes it possible to further promote the decomposition of organic matter by activated sludge. In addition, activated sludge can be further propagated.

Further, by generating a swirling flow by the air diffuser 292, the filter 320 can be washed by the swirling flow (downward flow). This makes it possible to suppress clogging of the filter 320. Therefore, the frequency of maintenance of the filter 320 can be reduced.

Further, the swirling flow will circulate between the filter modules 280. As a result, the treated water can efficiently reach the filter 320. Therefore, it is possible to improve the filtration efficiency of the filter 320.

Further, the air diffuser 292 is provided in the treatment water tank 210 at a position different from that of the filter module 280 in the horizontal direction (X direction in FIG. 2), so that air (air bubbles) comes into direct contact with the filter 320. It can be avoided. Therefore, it is possible to prevent the flock from being crushed due to the air bubbles coming into contact with the filter 320. As a result, activated sludge that passes through the filter 320 can be reduced.

As described above, in the wastewater treatment device 110 according to the present embodiment, the filter module 280 treats the water tank 210 so that the surface direction of the filter 320 intersects with the flow of wastewater from the inflow port 222 to the outflow port 232. It is held inside. That is, the filter module 280 is held in the treatment water tank 210 so that the plane direction of the filter 320 intersects the virtual line passing through the inflow port 222 and the outflow port 232 and a line parallel to the virtual line. Therefore, a plurality of filter modules 280 can be installed in the treated water tank 210 with a simple configuration, and the contact area between the filter 320 and the wastewater (treated water) can be increased. Therefore, it is possible to increase the passing speed of wastewater (treated water) in the treated water tank 210 while maintaining the concentration of activated sludge in the treated water tank 210 at a predetermined value. In addition, the wastewater treatment efficiency can be improved.

If the filter module 280 is installed so that the surface direction of the filter 320 is parallel to the flow of drainage from the inflow port 222 to the outflow port 232, the effect of the swirling flow by the air diffuser 292 can be enjoyed. Can't. Therefore, it becomes difficult to suppress clogging of the filter 320. Further, when the same number of filter modules 280 as the wastewater treatment device 110 are installed, the holding structure of the filter module 280 becomes complicated.

Further, as described above, the opening of the filter 320 is in the range of 10 μm or more and 200 μm or less, which is larger than the pore size of the microfiltration membrane. Therefore, clogging of the filter 320 due to the flocs of activated sludge and filtration resistance can be reduced. This makes it possible to reduce the cost for cleaning the filter 320 as compared with the conventional technique for separating the flocs with a microfiltration membrane.

Further, since the opening of the filter 320 is within the range of 10 μm or more and 200 μm or less, the treated water can be passed under natural flow without suction by a pump or the like. Therefore, the wastewater treatment device 110 can reduce the equipment cost as compared with the conventional technique of separating the flocs with a microfiltration membrane. Further, the filter 320 has a large permeation flux as compared with the conventional technique for separating the flocs with a microfiltration membrane. Therefore, as compared with the prior art, the wastewater treatment apparatus 110 can improve the wastewater treatment speed.

Further, as described above, since the filter 320 is made of a woven fabric, the opening of the filter 320 is constant unlike the non-woven fabric. Thereby, the opening can be easily set in advance according to the desired concentration of activated sludge. In addition, the woven fabric has no complicated gaps as compared with the non-woven fabric. Therefore, the filter 320 can be easily washed.

Further, compared with the conventional activated sludge treatment apparatus, the activated sludge flowing out from the filter 320 (treated water tank 210) can be significantly reduced. Therefore, the load on the settling basin 120 can be reduced, and the settling basin 120 can be miniaturized. Further, since the amount of activated sludge flowing out from the treatment water tank 210 to the settling basin 120 can be reduced, it is possible to omit the mechanism for returning the activated sludge from the settling basin 120 to the treatment water tank 210.

Further, when a large amount of suspended organic matter is contained in the wastewater, it is preferable to use a filter 320 having an opening that selectively captures the suspended organic matter having a large particle size. In this case, the residence time of the suspended organic matter in the treated water tank 210 can be lengthened, and the decomposition efficiency of the suspended organic matter in the treated water tank 210 can be improved.

Further, the filter module 280 can be attached to the partition water channel 260 simply by inserting the filter module 280 into the frame body 272. That is, the filter module 280 is detachably provided in the compartmentalized waterway 260. Therefore, if the filter 320 is clogged or the filter 320 is damaged, it can be easily replaced.

(Modification example)
The wastewater treatment device 110 may include a sealing portion 410 for sealing the notch instead of the filter module 280.

FIG. 6 is a diagram illustrating the sealing portion 410. FIG. 6A is a perspective view of the sealing portion 410. FIG. 6B is a top view of the sealing portion 410.

As shown in FIG. 6A, the sealing portion 410 includes a flat surface portion 412 and a protruding portion 414. As shown in FIGS. 6A and 6B, the flat surface portion 412 is a plate member larger than the gap defined by the bottom surface 272a, the side surfaces 272b, and 272c of the frame body 272. When the sealing portion 410 is arranged in the compartmentalized water channel 260, the flat surface portion 412 seals the gap partitioned by the bottom surface 272a, the side surfaces 272b, and 272c. The protruding portion 414 is a plate member protruding from the flat surface portion 412. The protruding portion 414 has a size of contacting the side surface portion 264c when the sealing portion 410 is arranged in the compartmentalized water channel 260.

With the configuration including the sealing portion 410, it is possible to avoid a situation in which the treated water flows into the partition water channel 260 without passing through the filter 320 when the filter module 280 is replaced. Specifically, when replacing the filter module 280, first, the sealing portion 410 is installed in the partition water channel 260. After that, the filter module 280 is removed from the holding portion 270. Then, a new filter module 280 is attached to the holding portion 270. Finally, the sealing portion 410 is removed from the compartmentalized channel 260. This makes it possible to replace the filter module 280 while supplying wastewater to the treated water tank 210 (while treating the wastewater in the treated water tank 210).

Although the embodiments have been described above with reference to the accompanying drawings, it goes without saying that the present disclosure is not limited to the above embodiments. It is clear to those skilled in the art that various modifications or modifications can be conceived within the scope of the claims, and it is understood that they also naturally belong to the technical scope of the present disclosure. Will be done.

For example, in the above embodiment, the configuration in which the inflow port 222 is provided above the treatment water tank 210 has been described as an example. However, the inflow port 222 may be formed in the treated water tank 210.

Further, in the above embodiment, a configuration in which a plurality of through holes 310a are provided on the side surfaces 312 and 314 of the support 310 will be described as an example. However, a notch of 1 may be formed on the side surfaces 312 and 314 of the support 310. In this case, it is preferable to provide a wire mesh or the like between the side surfaces 312 and 314 and the filter 320. As a result, it is possible to avoid a situation in which the filters 320 come into contact with each other.

Further, in the above embodiment, a configuration in which two filters 320 are attached to the support 310 will be described as an example. However, one filter 320 may be wound around the treatment water tank 210.

Further, in the above embodiment, the filter 320 having a woven fabric having an opening of 10 μm or more and 200 μm or less has been described as an example. However, the filter 320 may be a combination of a woven fabric having a mesh size of 10 μm or more and 200 μm or less and a woven fabric having a mesh size of 200 μm or more and 1 mm or less. In this case, a woven fabric having a relatively large opening may be attached to the support 310. As a result, it is possible to avoid a situation in which the fabric having a relatively small opening is damaged by the corners of the support 310.

Further, in the above embodiment, the configuration in which the compartmentalized waterway 260 is arranged on the side wall 214c side has been described as an example. However, the compartmentalized channel 260 may be located in the center of the treated water tank 210.

Further, in the above embodiment, the case where the side surface portion 264c constituting the compartmentalized waterway 260 is separate from the side wall 214c has been described as an example. However, the side surface portion of the compartmentalized channel 260 may be the side wall 214c.

Further, in the above embodiment, the configuration in which the wastewater treatment device 110 includes the partition wall 240 and the support plate 250 has been described as an example. Therefore, the wastewater treatment device 110 can be obtained only by installing the partition wall 240, the support plate 250, the partition water channel 260, the holding portion 270, and the filter module 280 in the existing (conventional) activated sludge treatment device. However, the partition wall 240 and the support plate 250 are not essential configurations. For example, the discharge port 268a of the compartmentalized channel 260 may be directly connected to the outlet 232.

Further, in the above embodiment, the configuration in which the compartmentalized waterway 260 is arranged over the upstream side region 210A and the downstream side region 210B has been described as an example. However, the compartmental channel 260 may be arranged only in the upstream region 210A. That is, the discharge port 268a and the communication port 242 may be directly connected.

Further, in the above embodiment, the configuration in which the filler 340 is provided on the support 310 has been described as an example. However, the filler 340 may be provided between the frame body 272 and the support body 310. For example, the filler 340 may be provided on the frame 272.

Further, in the above embodiment, the configuration in which the air diffuser 292 supplies air has been described as an example. However, the air diffuser 292 may supply a gas (for example, a gas containing oxygen).

Further, in the above embodiment, activated sludge has been described as an example of the microorganisms contained in the treated water tank 210. However, the type of microorganisms contained in the treated water tank 210 is not limited as long as it can decompose the object to be treated contained in the wastewater. For example, the object to be treated may be a microorganism (for example, nitrifying bacterium, denitrifying bacterium) that decomposes an organic substance, a nitrogen compound, or the like.

The present disclosure can be used for a wastewater treatment apparatus that decomposes an object to be treated contained in wastewater by microorganisms.

110 Wastewater treatment device 210 Treatment water tank 210A Upstream area 210B Downstream area 222 Inflow port 232 Outlet 240 Partition wall 242 Communication port 260 Partition waterway 262 Bottom part 264 Side wall part 264b Side part 268a Outlet port 268b Notch 270 Holding part 272 frame Body 280 Filter module 292 Air diffuser 310 Support 310a Through hole 312 Side 314 Side 318 Bottom 320 Filter 330 Outlet port 340 Filler 410 Sealing part

Claims (8)

A treatment tank that houses wastewater and microorganisms,
An inflow port formed at one end of the treated water tank or provided above one end of the treated water tank.
An outlet formed at the other end of the treated water tank and
It has a rectangular bottom surface portion, a side surface portion in which one or more notches are formed, and a discharge port provided at a position orthogonal to the surface direction of the side surface portion and communicating with the outlet. A compartmentalized water channel having a rectangular tube-shaped side wall portion erected vertically above the bottom surface portion and provided in the treated water tank.
On the outer surface of the two sides, a support having two sides facing each other, extending vertically and having one or more through holes, and a bottom surface that seals the lower part of the two sides. One or more filter modules arranged and having a planar filter having a plurality of through holes through which the drainage passes, and an outlet for guiding the drainage that has passed through the filter to the outlet.
A holding portion for holding the support of the filter module in the treated water tank so that the surface direction of the filter intersects the flow of the drainage from the inlet to the outlet .
The holding portion is composed of a frame body protruding outward from the side surface portion from the notch in the compartmentalized water channel.
The support of the filter module, such that the outlet port is positioned in the compartment waterways, waste water treatment equipment Ru fitted in the frame. And the frame body, between the support, the waste water treatment apparatus according to claim 1, further comprising a filler having elasticity. A partition wall provided between the inlet and the outlet of the treated water tank and dividing the inside of the treated water tank into an upstream region and a downstream region.
The communication port formed on the partition wall and
With
At least a part of the compartmentalized channel is provided in the upstream region.
The wastewater treatment device according to claim 1 or 2 , wherein the discharge port of the compartmentalized water channel communicates with the outlet through the communication port. The wastewater treatment apparatus according to any one of claims 1 to 3 , further comprising a sealing portion for sealing the notch instead of the filter module. The wastewater treatment apparatus according to any one of claims 1 to 4 , which is provided below the filter module in the treatment water tank and includes an air diffuser for supplying gas. The wastewater treatment device according to claim 5 , wherein the air diffuser is provided in the treatment water tank at a position different from that of the filter module in the horizontal direction. The wastewater treatment apparatus according to any one of claims 1 to 6 , wherein the filter is made of a woven fabric having an opening of 10 μm or more and 200 μm or less. The wastewater treatment apparatus according to any one of claims 1 to 7 , wherein the microorganism is activated sludge.

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