JP2017140594A - Sewage treatment instrument and regenerated water system of sewage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sewage treatment instrument and a regenerated water system of sewage, capable of exerting a higher sewage treatment effect when used in a flow under a water flow condition inside a sewage treatment tank.SOLUTION: A sewage treatment instrument 200 includes a sewage treatment microorganism carrier body 1 composed of a crimpable fiber assembly; and capsule accommodation tool 100 having a plurality of water passage pores 105 around and configured to accommodate the sewage treatment microorganism carrier body 1. The capsule accommodation tool 100 includes an accommodation area S2 for accommodating the sewage treatment microorganism carrier body 1 and a non-accommodation area S1 for not accommodating the sewage treatment microorganism carrier body 1. The accommodation area S2 and the non-accommodation area S1 are arranged so that fluid can be circulated through each other.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sewage treatment tool and a sewage reclaimed water system containing a sewage treatment microorganism carrier.

  2. Description of the Related Art Conventionally, sewage treatment microorganism carriers used under running water conditions in a sewage treatment tank, so-called fluid carriers, have been proposed in various shapes.

  For example, Patent Document 1 listed below proposes a microorganism carrier for sewage treatment (water retentive nodule) composed of a ball-like body (ball-like fiber aggregate) of crimped fiber aggregates.

  Further, a microbial support for sewage treatment in which these ball-shaped fiber assemblies are put in a protective container has also been proposed. For example, in Patent Document 1 below, a plurality of ball-shaped bodies are arranged as hollow convex portions of a protective container. Is contained. Further, for example, Patent Document 2 described below describes a configuration in which the container has a spherical arch lattice structure, and the microorganism carrier for sewage treatment is accommodated in the frame constituting the spherical arch lattice structure so as not to fall off. Has been.

Japanese Patent No. 2919266 Patent 3121063

  When the above-described ball-shaped fiber assembly is used as a fluid carrier that flows under flowing water conditions in a sewage treatment tank, the volume is compared with a sponge or a hollow cylinder that is widely used as an existing fluid carrier. It is considered that the implantation of microorganisms such as bacteria having a large specific surface area is advantageous. However, in reality, the adhesion of microorganisms is uneven due to the specific surface area and the water treatment effect is not improved, and the adhesion of metazoans such as earthworms is not sufficient, and the effect of sewage treatment is insufficient. Further, when the ball-shaped fiber assembly is simply put in a container, it becomes a large sludge mass due to the adhesion of microorganisms, the inside becomes anaerobic, and organic matter is generated, which may impede purification of sewage.

  This invention is made | formed in view of such a subject, The objective is the sewage treatment tool and sewage which show a high sewage treatment effect, when it is made to flow under the flowing water conditions in a sewage treatment tank, and is used. Is to provide a reclaimed water system.

  In order to solve the above-mentioned problems, a sewage treatment tool according to the present invention is a sewage treatment tool that is accommodated in a sewage treatment tank and used by being flowed, and is provided with a microorganism for sewage treatment comprising a crimpable fiber assembly. And a capsule container that has a large number of water passage holes around it, and that accommodates the sewage treatment microorganism carrier, and the capsule container has a housing region that houses the sewage treatment microorganism carrier. And a non-contained area that does not accommodate the sewage treatment microorganism carrier, and the accommodating area and the non-contained area are arranged so that liquid flows through each other.

  According to such a configuration, since the non-contained area that does not accommodate the sewage treatment microorganism carrier is provided in the capsule container, the water flow through the capsule container is improved, and the capsule container is accommodated in the container area. The exposure of the sewage treatment microorganism carrier can be made uniform. As a result, small microorganisms such as bacteria uniformly adhere to the inside of the microorganism carrier for sewage treatment accommodated inside the capsule container, and metazoans such as earthworms also adhere to the sewage treatment including sludge reduction. Ability can be improved. In addition, the solution containing dissolved oxygen enters and exits the non-contained area, so that dissolved oxygen is well replenished to microorganisms living in the microorganism carrier for sewage treatment, and sewage purification proceeds efficiently in an aerobic atmosphere as a whole. Become.

  Moreover, it is also preferable that the non-accommodating region is a space surrounded by a plurality of struts arranged at intervals in an annular shape in plan view on the center side of the capsule container. The non-accommodating region is preferably a cylindrical core provided on the center side of the capsule container, and a communication hole through which liquid flows is formed on the side of the core. When the sewage treatment microorganism carrier is contained in the capsule container as in the conventional case, the exposure of the sewage treatment microorganism carrier is particularly uneven at the center side of the capsule container, and the microorganisms for sewage treatment are carried. Microbial adhesion to the body may be uneven. On the other hand, in the present invention, by providing a non-contained region on the center side of the capsule container, it is possible to make the exposure of the sewage treatment microorganism carrier uniform, and adhere microorganisms to the sewage treatment microorganism carrier. Can improve the uniformity.

  The sewage treatment microorganism carrier is preferably arranged in a spiral shape around the non-accommodating region, and the sewage treatment microorganism support member arranged in the spiral shape has the crimpability. It is preferable that the fiber assembly is composed of a bead-like fiber assembly connected in a daisy chain. By arranging the sewage treatment microorganism carrier in this manner, the exposure of the sewage treatment microorganism carrier in the capsule container can be made uniform, and the sewage treatment microorganism carrier can be carried from the capsule container during flow. The body can be prevented from jumping out. Furthermore, dropping off of metazoans such as microorganisms and earthworms that have landed on the sewage treatment microorganism carrier can be prevented by impact or deformation caused by collision between the sewage treatment microorganism carriers. As a result, the adhesion of microorganisms to the microorganism carrier for sewage treatment is made uniform, the adhesion amount of microorganisms increases, and the adhesion amount of metazoans such as earthworms also increases.

  Moreover, it is preferable that the capsule container has a spherical lattice shape, and fins extending toward the center of the capsule container are provided inside the frame constituting the spherical lattice. According to this configuration, the fin functions for water flow control, and a water flow in a certain direction flows into the capsule container under flowing water conditions in the sewage treatment tank. As a result, the contact property between the fibrous aggregate inside the capsule container and the sewage is improved, and the sewage treatment capacity is improved.

  Further, in the sewage reclaimed water system comprising a sewage treatment tank for accommodating the sewage treatment tool, the sewage treatment tank is a membrane separation of the first treatment tank containing the sewage treatment tool in a fluid state, sludge and treated water. And a second treatment tank containing a membrane separation apparatus. For example, in a sewage reclaimed water system equipped with only a membrane separator, membrane clogging occurs in the membrane separator due to extracellular metabolites (EPS) and soluble microbial metabolites (SMP) mainly composed of polysaccharides and proteins. Sometimes. In contrast, in the present invention, by using a sewage treatment tool in a sewage reclaimed water system, microorganisms suitable for the environment live there and process the EPS and SMP. For this reason, the EPS and SMP concentrations are remarkably lowered and film clogging is reduced. As a result, the load in membrane separation is reduced, the ability to increase flux is improved, and power consumption can be reduced and the useful life of the membrane separation device can be improved.

  According to the present invention, it is possible to provide a sewage treatment tool and a sewage reclaimed water system that exhibit a high sewage treatment effect when used under flowing water conditions in a sewage treatment tank.

It is a figure which shows an example of the sewage treatment tool which concerns on embodiment of this invention. It is a disassembled perspective view of the capsule container shown in FIG. It is a perspective view which shows the inside of a capsule container shown in FIG. It is a figure which shows the microorganisms support body for wastewater treatment accommodated in the capsule container shown in FIG. It is a figure showing an example of the reclaimed water system of sewage concerning the embodiment of the present invention. It is a figure which shows the recycled water system of the sewage which concerns on a comparative example.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the following description of the preferred embodiment is merely an example, and is not intended to limit the present invention, its application, or its use.

  First, the configuration of the sewage treatment tool according to the embodiment of the present invention will be described. FIG. 1 is a diagram illustrating an example of a sewage treatment tool. FIG. 2 is an exploded perspective view of the capsule container.

  As shown in FIG. 1, the sewage treatment tool 200 includes a capsule container 100 and a number of sewage treatment microorganism carriers 1 housed in the capsule container 100.

  The capsule container 100 has a spherical lattice shape (spherical arch lattice structure), and the size thereof is not particularly limited. For example, those having a diameter (outer diameter) of 166 mm and 200 mm are used. Further, the gap between the lattices of the capsule container 100 is smaller than the diameter of the microorganism carrier 1 for sewage treatment. The gap between the lattices of the capsule container 100 serves as a water passage hole 105 (FIG. 2) for introducing liquid (including sewage) into the capsule container 100 when the sewage treatment tool 200 is accommodated in the sewage treatment tank. Function.

  The material of the capsule container 100 is not particularly limited, but for example, a synthetic resin such as polypropylene can be selected.

  The capsule container 100 is configured by combining two hemispherical members 100a and 100b as shown in FIG. If the two hemispherical members 100a and 100b are combined after accommodating the sewage treatment microorganism carrier 1, the sewage treatment microorganism carrier 1 can be housed in a manner that prevents it from dropping off. The method for joining the two hemispherical members 100a and 100b is not particularly limited, but it is usually sufficient that the two hemispherical members 100a and 100b can be fitted to each other using an engagement piece or the like.

  Further, as an example, the capsule container 100 includes annular frames 101, 102, 103, and 104 and a radial frame 120 as shown in FIG. The interval and number of frames are appropriately selected in consideration of the size and material of the container, the size of the fiber assembly accommodated therein, and the like.

  In addition, as shown in FIG. 2, the capsule container 100 has fins 121 for controlling water flow at least at a part of the inside of the radial frame 120 constituting the spherical lattice. The fins 121 are constituted by plate-like members that extend radially toward the center of the capsule container 100 inside the radial frame 120 that forms a spherical lattice. Note that the shape and size of the fin 121 are not limited to the example shown in FIG. 2, and various other shapes and sizes can be selected as long as the fin 121 has a water flow control function.

  As shown in FIG. 2, the hemispherical member 100 b is provided with a plurality of columns 130 on the center side of the capsule container 100. The plurality of struts 130 are arranged in an approximately annular shape in plan view, and the distance between the adjacent struts 130 is smaller than the outer shape of the sewage treatment microorganism carrier 1 (see FIG. 4 and the like). The tip portions 131 of the plurality of struts 130 are engaged with the engaging portions 132 of the hemispherical member 100a provided so as to correspond to the arrangement of the struts 130 when the hemispherical members 100a and 100b are coupled to each other. Combined. As described above, the hemispherical members 100 a and 100 b are coupled to each other, so that a space surrounded by the plurality of support columns 130 is formed on the center side of the capsule container 100. As will be described later, in this embodiment, the sewage treatment microorganism carrier 1 is not accommodated in the space surrounded by the plurality of struts 130, and the sewage treatment microorganism support is provided along the periphery of the plurality of struts 130. The body 1 is arranged.

  Note that the number, arrangement, shape, and the like of the columns 130 are not limited to the example shown in the figure, and when the hemispherical member 100a is engaged with the engaging portion 132, sewage is contained in the space surrounded by the columns 130. The support | pillar 130 should just be provided so that the microorganisms 1 for a process may not enter. In FIG. 2, the support pillars 130 are arranged in a substantially circular shape in plan view. However, the column 130 is not limited to this example. including.

  As shown in FIG. 3, the sewage treatment microorganism carrier 1 accommodated in the capsule container 100 is disposed along the periphery of the plurality of columns 130. Preferably, the microorganism carrier 1 for sewage treatment is preferably arranged in a spiral shape so as to be wound around a plurality of support columns 130 arranged at intervals in a substantially annular shape in plan view. More preferably, the microorganism-supporting body 1 for sewage treatment disposed spirally around the plurality of columns 130 forms a rosary fiber assembly 9 in which fiber assemblies are connected in a daisy chain, and the rosary fiber It is preferable that the aggregate 9 is accommodated in the capsule container 100. When connecting to a rosary chain, for example, the sewage treatment microorganism carrier 1 may be connected via a converging part 5 (see FIG. 4) to form a rosary fiber assembly 9.

  The number of stored sewage treatment microorganism carriers 1 varies depending on the size of the capsule container 100 and the size and shape of the sewage treatment microorganism carrier 1, but usually only about 10 to 100 containers may be stored. In this case, the number is preferably such that the sewage treatment microorganism carrier 1 does not easily move in the capsule container 100 and does not cause deformation of the sewage treatment microorganism carrier 1. This is more excellent in the ability to attach microorganisms when they are packed to a certain extent, and can prevent microorganisms from falling off due to collision between the sewage treatment microorganism carriers 1 in the capsule container 100 in a fluid state. Because it becomes.

  As shown in FIG. 3, an area in the capsule container 100 where the sewage treatment microorganism carrier 1 is not accommodated (in this embodiment, a space surrounded by a plurality of support columns 130) is “non-accommodated” in the present invention. A region in which the sewage treatment microorganism carrier 1 is accommodated inside the capsule container 100, which corresponds to “region” and is represented by reference S1, corresponds to “containment region” in the present invention and is represented by reference S2. .

  In the example shown in FIG. 3, the non-accommodating region S <b> 1 is composed of a space surrounded by a plurality of support columns 130 arranged at regular intervals in a substantially annular shape in plan view, but is not limited to this example. For example, the non-accommodating area may be constituted by a cylindrical (cylindrical or rectangular tube shape) core provided on the center side of the capsule container. In this case, a communication hole through which the liquid flows is formed on the side surface of the core portion, and the inside of the core portion (non-accommodating region) and the outside of the core portion (accommodating region) pass through the communication hole. Distribute to each other.

  In the example shown in FIG. 3, one non-accommodating area S1 and one accommodating area S2 are shown. For example, two non-accommodating areas S1 and three accommodating areas S2 may be provided. The number of areas is not limited. In addition, the arrangement of the non-accommodating region S1 is not limited to the center side inside the capsule container 100 as shown in FIG. 3. For example, the non-accommodating region S1 is arranged on the end side inside the capsule container 100. Then, the accommodation area S2 may be arranged on the center side, and the arrangement of each area is also set as appropriate. As described above, the shape, number, arrangement, and the like of the non-accommodating area S1 and the accommodating area S2 in the present embodiment are not limited to the example illustrated in FIG.

  Then, the structure of the microorganisms support body 1 for wastewater treatment is demonstrated. As shown in FIG. 4, the sewage treatment microorganism carrier 1 accommodated in the capsule container 100 is composed of a crimped fiber assembly formed by bundling crimped fiber bundles.

  The crimpable fiber assembly has, for example, a structure in which bundled crimped fiber bundles are converged at both ends, and a central portion sandwiched between both convergent portions is formed in a ball shape (substantially spherical). The adhering organisms of the ball-shaped body composed of the crimped fiber aggregates in this embodiment are similar to the fixed bed, and there are many kinds and amounts of protozoa and metazoans, regardless of the fluid carrier. In addition, the shape of the microorganism carrier 1 for wastewater treatment is not limited to a ball shape (substantially spherical shape) as shown in FIGS. 3 and 4, and various shapes such as a rectangular parallelepiped shape can be selected. As shown in FIG. 4, the central ball-shaped portion is referred to as a “ball-shaped portion” and is denoted by a reference numeral “3”. And denoted by the reference numeral “5”. The diameter of the ball-shaped portion 3 is about 20 to 30 mm. The structure that bundles the crimped fiber bundles is preferable because the fibers are not scattered or entangled under running water in the tank.

  The degree of crimp in the crimped fiber is preferably 10 to 16 times / 10 cm, and the cross-sectional shape of the fiber is preferably circular, but is not limited to a circular shape, and an elliptical shape, a rectangular shape, a triangular shape, a hollow shape, or the like may be used. . The fineness is preferably, for example, 140 to 160d, but is not limited to this value and is set as appropriate.

  Further, the porosity of the ball-shaped portion 3 is preferably 80 to 95% with respect to the apparent volume of the ball-shaped portion 3, but is not limited to this value. The apparent volume of the ball-shaped portion 3 is the volume of a sphere that forms the outer shape of the ball-shaped portion.

Further, the average interval between the fibers of the ball-like portion 3 excluding the converging portion 5 is preferably 0.05 to 0.15, for example, but is not limited to this value. The average interval between the fibers is a numerical value obtained from the following calculation formula (1).
Average interval = apparent volume of the ball-shaped part 3 (cubic cm) × porosity of the ball-shaped part 3 (%) /
Total length (cm) of fibers constituting the ball-shaped portion 3 (1)

The total fiber length in the above calculation formula (1) is the sum of the lengths of all the fibers constituting the ball-shaped portion 3. The length of the fiber can be calculated from the following formula by measuring the weight of the fiber constituting the ball-shaped portion 3.
Fiber length (cm) = fiber weight (g) / fineness (denier) × 900000 cm
The fineness (denier) represents the weight (g) per 900,000 cm. Or
When the cross section of the fiber is circular, it may be calculated from the diameter and specific gravity of the fiber.

In addition, as a method of converging the crimped fiber bundle, there are a method of heat-sealing by ultrasonic waves or high frequency, a method of converging by ligation with a synthetic resin wire or a metal wire, and the like. The synthetic resin wire material is PP (polypropylene), PET (polyethylene terephthalate), PA (polyamide), PS (polystyrene), PE (polyethylene), HDPE (high density polyethylene), VDC / VC (vinylidene chloride / vinyl chloride). Copolymer), VDC / MA (vinylidene chloride / methyl acrylate copolymer), HIPS (impact-resistant polystyrene), and the like.
The metal wire material is preferably ligated with an aluminum wire such as that found in sausages because it is easy to focus, strong and hard to come off, and inexpensive.
When the crimped fiber bundle is converged, the converging position may be at the center or at both ends.

  The number of fibers constituting one ball-shaped portion 3 is not particularly limited, but is usually composed of 100 to 10,000 crimped fibers. The type of fiber may be any synthetic fiber, and examples thereof include vinyl chloride, vinylidene chloride, polyamide, polyester, and polypropylene fiber. In particular, vinylidene chloride resin fibers are more preferable. The vinylidene chloride resin fiber referred to here is a polyvinylidene chloride fiber containing 80 to 99% by weight of a vinylidene chloride resin. When this fiber is used, it is native to the implantation of microorganisms such as bacteria and the earthworms. Since it is excellent in the implantation of an animal, it is more preferable.

  The vinylidene chloride-based resin is obtained by polymerizing a monomer mixture including a vinylidene chloride monomer as a main component and at least one ethylene derivative monomer copolymerizable with the vinylidene chloride monomer. Here, “mainly” means that the vinylidene chloride monomer accounts for 70% by weight or more of the entire monomer mixture.

  Ethylene derivative monomers that may be included in the monomer mixture include nitriles of ethylenically unsaturated carboxylic acids such as acrylonitrile and methacrylonitrile, alkyl esters of acrylic acid and methacrylic acid such as methyl acrylate and methyl methacrylate, hydroxypropyl acrylate, Of hydroxyalkyl esters such as hydroxyethyl acrylate and hydroxybutyl acrylate, vinyl esters of saturated carboxylic acids such as vinyl acetate, amides of ethylenically unsaturated carboxylic acids such as acrylamide, ethylenically unsaturated carboxylic acids such as acrylic acid, allyl alcohol Examples thereof include ethylenically unsaturated alcohols and vinyl halides such as vinyl chloride. Among these, a vinyl chloride copolymer is superior in terms of fiber flexibility and durability, and is more preferable.

  Although the preferred weight ratio of vinylidene chloride monomer to ethylene derivative monomer in the monomer composition varies depending on the ethylene derivative monomer used, for example, when the ethylene derivative monomer is vinyl chloride, the preferred weight of vinylidene chloride monomer / vinyl chloride monomer The ratio is 70/30 or more and 98/2 or less. As the vinylidene chloride monomer obtained by setting the vinylidene chloride monomer to 70% by weight or more, crystallization is promoted, shrinkage of fibers is reduced, and dimensional stability is maintained, which is preferable. Conversely, the vinylidene chloride monomer content is preferably 98% by weight or less because the vinylidene chloride resin is not brittle and the strength is maintained, and the durability of the fiber assembly is further improved. More preferably, the weight ratio of vinylidene chloride monomer / vinyl chloride monomer is 80/20 or more and 95/5 or less.

  Then, the recycled water system of the sewage which accommodated the sewage treatment tool mentioned above is demonstrated. FIG. 5 is a schematic view showing an example of a sewage reclaimed water system according to an embodiment of the present invention.

  The sewage reclaimed water system 400 includes a fluidized bed biological treatment tank 401 (first treatment tank) and a membrane separation activated sludge treatment tank 402 (second treatment tank), and the fluidized bed biological treatment tank 401 and the membrane separation activity. A sludge treatment tank 402 is separated by a screen 70. The treatment tank provided with the first treatment tank and the second treatment tank corresponds to the “sewage treatment tank” in the present invention. The sewage treatment tank may be a single tank or a multistage tank.

  The fluidized bed biological treatment tank 401 contains a large number of sewage treatment tools 200 configured as described above in a fluidized state, and the membrane separation activated sludge treatment tank 402 is provided with a membrane separation device 50. A hole 70 smaller than the outer diameter of the sewage treatment tool 200 is formed in the screen 70 that divides both treatment tanks, and floating sludge and treated water held in both treatment tanks circulate through the holes 71. The sewage treatment tool 200 is prevented from flowing toward the membrane-separated activated sludge treatment tank 402 side. In addition, floating sludge increases or decreases and may not exist.

  The fluidized bed biological treatment tank 401 and the membrane separation activated sludge treatment tank 402 are provided with an air diffuser 60 to which air is supplied from the blower 90. In addition, the treated water separated from the activated sludge by the membrane separation device 50 provided in the membrane separation activated sludge treatment tank 402 is discharged as purified treated water through the pump 80.

  Since the sewage treatment tool 200 is housed as described above, the extracellular metabolites (EPS) and soluble microbial metabolites (SMP) mainly composed of polysaccharides and protein chambers present in both treatment tanks are: The sewage treatment tool 200 can be treated with microorganisms that live in the sewage treatment microorganism carrier 1 (see FIG. 4). Compared with this configuration, for example, in a configuration in which the sewage treatment tool 200 as shown in FIG. 6 (comparative example) is not provided (membrane separation activated sludge treatment tank 402b provided only with the membrane separation device 50), the polysaccharide or protein chamber Occurrence of membrane clogging of the membrane separation device 50 may occur due to extracellular metabolites (EPS) and soluble microbial metabolites (SMP). On the other hand, in the reclaimed water system 400 shown in FIG. 5, as described above, an extracellular metabolite (EPS) or a soluble microbial metabolite mainly composed of polysaccharides and protein chambers present in both treatment tanks. Since (SMP) can be treated by microorganisms that live in the sewage treatment microorganism carrier 1 (see FIG. 4 and the like) in the sewage treatment tool 200, membrane clogging of the membrane separation device 50 can be suppressed. As a result, the load in membrane separation is reduced, the ability to increase flux is improved, and power consumption can be reduced and the useful life of the membrane separation device 50 can be improved.

  As mentioned above, although embodiment of this invention was described, this is an illustration for description of this invention, Comprising: It is not the meaning which limits the scope of the present invention only to this embodiment. The present invention can be implemented in various other embodiments.

1: Microbe support for wastewater treatment 3: Ball-shaped part 5: Converging part 9: Beaded fiber aggregate 50: Membrane separator 60: Air diffuser 70: Screen 80: Pump 90: Blower 100: Capsule container 105: Water flow hole 120: Radial frame 121: Fin 130: Prop 200: Sewage treatment tool 400: Sewage reclaimed water system 401: Fluidized bed biological treatment tank 402: Membrane separation activated sludge treatment tank S1: Non-contained area S2: Contained area

Claims (7)

A sewage treatment tool that is housed in a sewage treatment tank and is used by flowing,
A microbial support for wastewater treatment comprising a crimped fiber assembly;
A capsule container having a large number of water passage holes around it, and containing the sewage treatment microorganism carrier;
The capsule container has a storage area for storing the microorganism carrier for sewage treatment, and a non-storage area for not storing the microorganism carrier for sewage treatment,
The storage area and the non-storage area are sewage treatment tools arranged such that liquid flows through each other.   2. The sewage treatment tool according to claim 1, wherein the non-accommodating region includes a space surrounded by a plurality of support columns arranged at intervals in an annular shape in a plan view on the center side of the capsule container. The non-accommodating region is a cylindrical core provided on the center side of the capsule container,
The sewage treatment tool according to claim 1, wherein a communication hole through which a liquid flows is formed on a side surface of the core portion.   The sewage treatment tool according to claim 2 or 3, wherein the sewage treatment microorganism carrier is arranged in a spiral shape around the non-accommodating region.   The sewage treatment tool according to claim 4, wherein the spirally disposed microorganism-supporting body for sewage treatment comprises a rosary fiber aggregate in which the crimped fiber aggregates are connected in a daisy chain. The capsule container has a spherical lattice shape,
The sewage treatment tool according to any one of claims 1 to 5, wherein a fin extending toward a central portion of the capsule container is provided inside a frame constituting the spherical lattice. In the sewage reclaimed water system provided with the sewage treatment tank which stores the sewage treatment tool according to any one of claims 1 to 6,
The sewage treatment tank is a sewage reclaimed water system comprising: a first treatment tank containing the sewage treatment tool in a fluidized state; and a second treatment tank containing a membrane separation device for membrane separation of sludge and treated water.

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