JP2023112719A - Waste water treatment apparatus - Google Patents

Abstract

To increase wastewater treatment efficacy as much as possible while suppressing enlargement of an apparatus.SOLUTION: There is provided a waste water treatment apparatus which comprises: a solid separation chamber 12 which separates waste water into an organic solid and a first waste liquid; an aerobic solubilization chamber 13 which solubilizes the sludge containing the separated organic solid to generate a second waste liquid; a mixed waste liquid storage chamber 14 which stores a mixed waste liquid of the first waste liquid and the second waste liquid; and an aerobic filter bed chamber 15 in which the mixed waste liquid is treated by biological membrane treatment, wherein the aerobic solubilization chamber 13, the mixed waste liquid storage chamber 14 and the aerobic filter bed chamber 15 are partitioned and formed by partitioning the interior space of a housing 100, the solid separation chamber 12 is formed by partitioning a partial area of the mixed waste liquid storage chamber 14 by a partition wall 12b and the gap between the inner wall of the housing 100 and the partition wall 12b is used as part of the mixed waste liquid storage chamber 14.SELECTED DRAWING: Figure 4

Description

The technology disclosed here belongs to the technical field related to wastewater treatment equipment.

In recent years, from the perspective of improving the convenience of life, wastewater treatment equipment has been introduced in collective housing that crushes organic solids (garbage, etc.) with a disposer installed in the kitchen and discharges the pulverized organic solids together with water as wastewater. It is Wastewater containing organic solids is purified by a wastewater treatment apparatus and discharged into a public sewage system or the like.

In Patent Document 1, a plurality of treatment tanks are installed in parallel in order from the shallowest first treatment tank to the deepest treatment tank in order, and the components that precipitate at the bottom of each treatment tank are A continuously movable garbage disposal is disclosed that is transported along the bottom of a tub.

Japanese Patent Application Laid-Open No. 2007-203132

By the way, the upstream portion of the wastewater treatment apparatus is required to have a relatively large volume since wastewater containing untreated organic solids is introduced. Also in Patent Document 1, the first processing tank is made larger than the other tanks. However, in Patent Document 1, the first processing bath must be made shallower than the other processing baths, so in order to make it larger than the other processing baths, it is necessary to widen the horizontal size. . Moreover, since the depth needs to be changed in stages, the vertical dimension of the wastewater treatment apparatus must match the depth of the deepest treatment tank. For this reason, it is necessary to increase the size of the apparatus both horizontally and vertically, and a relatively large dead space is formed.

On the other hand, if there is no configuration for collecting organic solids as in Patent Document 1, the wastewater treatment efficiency will decrease.

The technique disclosed herein has been made in view of the above points, and its purpose is to suppress the enlargement of the apparatus and to maximize the wastewater treatment efficiency.

A wastewater treatment apparatus for purifying and discharging wastewater containing organic solids is separated in a solids separation chamber for separating the wastewater into the organic solids and a first waste liquid, and the solids separation chamber. and a solubilization chamber for solubilizing the sludge transferred by the organic matter transfer unit by an activated sludge method to generate a second waste liquid. a waste liquid recirculation unit for recirculating the second waste liquid in the solubilization chamber to the solid matter separation chamber; a waste liquid storage chamber; and an aerobic treatment chamber for treating the mixed waste liquid transferred from the mixed waste liquid storage chamber by biofilm treatment using aerobic microorganisms, wherein the solubilization chamber and the mixed waste liquid storage chamber , and the aerobic treatment chamber are partitioned by partitioning the inner space of the housing, and the solid matter separation chamber is partitioned by partitioning a part of the mixed waste liquid storage chamber. A gap between the inner wall of the housing and the partition wall is part of the mixed waste liquid storage chamber.

According to this configuration, the volume of the solids processing chamber is relatively small because the solids separation chamber is formed by a part of the mixed waste liquid storage chamber. On the other hand, the first waste liquid and the second waste liquid flowing into the solid matter processing chamber flow into the mixed waste liquid storage chamber as a mixed waste liquid. That is, the space in which the organic solids accumulate is narrowed, while the space in which the waste liquid is accumulated remains wide. In particular, since the gap between the inner wall of the housing and the partition wall constituting the solid separation chamber is part of the mixed waste liquid storage chamber, the volume of the space for storing the waste liquid can be made as large as possible. . Therefore, it is not necessary to increase the size of the apparatus while forming a chamber for efficiently collecting the organic solid matter. Further, the organic solid matter separated in the solid matter separation chamber is transferred to the solubilization chamber by the organic matter transfer section, so that the organic solid matter does not accumulate excessively in the solid matter separation chamber. In addition, since the organic solid matter is mainly transferred to the solubilization chamber, the organic solid matter that needs to be solubilized can be mainly treated, and the efficiency of the solubilization treatment can be improved. As described above, the waste water treatment efficiency can be increased as much as possible while suppressing an increase in the size of the apparatus.

Further, by making the volume of the space for storing the mixed waste liquid as large as possible, even if one of the first waste liquid and the second waste liquid is slightly smaller or larger, the water quality of the mixed waste liquid is hardly affected. As a result, the water quality of the mixed waste liquid can be stabilized, and the treatment load in the aerobic treatment chamber can be stabilized.

In the wastewater treatment apparatus, the bottom portion of the solid matter separation chamber has an inclined surface, and the space formed between the inclined surface and the housing outside the solid matter separation chamber is the mixed waste liquid. It may be configured to be part of the storage chamber.

This configuration facilitates collection of organic solids in the solids separation chamber. In addition, since the space between the inclined surface and the housing is part of the mixed waste liquid storage chamber, no dead space is formed even if the inclined surface is provided at the bottom of the solid separation chamber. Therefore, even if the volume of the solid separation chamber is reduced by the amount of the inclined surface, the volume of the mixed waste liquid storage chamber is increased by that amount. As a result, the mixed waste liquid flowing out of the solid separation chamber can be sufficiently stored without enlarging the horizontal size of the mixed waste liquid storage chamber. As described above, it is possible to more effectively suppress an increase in the size of the device.

In the waste water treatment apparatus, the solid matter separation chamber may be configured by a tank body separate from the housing.

According to this configuration, the size of the solid matter separation chamber can be changed according to the situation in which the device is installed. For example, in an apartment complex with a large number of households, it is possible to design a relatively large solid separation chamber by enlarging the tank body. Since the solid matter separation chamber is formed in a partial area of the mixed waste liquid storage chamber, it is not necessary to increase the size of the housing even if the size of the tank body is increased. As a result, even when there is a large amount of organic solid matter, the organic solid matter can be collected in the solid matter separation chamber without increasing the size of the apparatus. As a result, it is possible to more effectively suppress the increase in size of the apparatus and to further improve the wastewater treatment efficiency.

In one embodiment of the wastewater treatment apparatus, it further comprises a second organic matter transfer section for transferring the organic solids deposited in the mixed waste liquid storage chamber to the solubilization chamber, and the mixed waste liquid storage chamber is perpendicular to the vertical direction. is arranged adjacent to the solubilization chamber in a first direction and adjacent to the aerobic treatment chamber in a second direction perpendicular to the vertical direction and crossing the first direction, A solids separation chamber is located at the end of the mixed waste storage chamber opposite the aerobic treatment chamber in the second direction.

According to this configuration, since the mixed waste liquid storage chamber is adjacent to both the solubilization chamber and the aerobic treatment chamber, the solid matter separation chamber is positioned far from the aerobic treatment chamber and close to the solubilization chamber. can be positioned. As a result, the first organic matter transfer section and the second organic matter transfer section can be made as small as possible, and the configuration for transferring the mixed waste liquid from the mixed waste liquid storage chamber to the aerobic treatment chamber can be made compact and simple. can. In addition, it is possible to prevent the first waste liquid and the second waste liquid that are not sufficiently mixed from the solid matter separation chamber from flowing into the aerobic treatment chamber. By arranging the chambers two-dimensionally in this way, it is possible to more effectively suppress an increase in the size of the apparatus and to further improve the wastewater treatment efficiency.

In the above embodiment, a downstream separation chamber for separating residual organic matter remaining in treated water treated in the aerobic treatment chamber from the treated water; a third organic transfer section for transferring to the solubilization chamber, wherein the downstream separation chamber is adjacent to the solubilization chamber in one of the first direction and the second direction and is adjacent to the solubilization chamber in the other direction; It may be arranged adjacent to the aerobic treatment chamber.

According to this configuration, the downstream separation chamber can be arranged in the space formed between the solubilization chamber and the aerobic treatment chamber in the internal space of the housing. need not be enlarged horizontally. Moreover, the downstream separation chamber and the solubilization chamber are adjacent to each other, so that the third organic matter transfer section can be made as small as possible. In addition, by removing the residual organic matter, the water quality of the effluent can be made appropriate. As a result, it is possible to more effectively suppress an increase in the size of the apparatus and to further improve the wastewater treatment efficiency.

As described above, according to the technology disclosed herein, the wastewater treatment efficiency can be increased as much as possible while suppressing an increase in the size of the apparatus.

FIG. 1 is a diagram of a case where a wastewater treatment system according to an exemplary embodiment is applied to an apartment house. FIG. 2 is a system diagram of a wastewater treatment device. FIG. 3 is a schematic diagram of a waste water treatment device. FIG. 4 is a plan view showing the layout of each chamber of the wastewater treatment apparatus. FIG. 5 is a perspective view of the tank body. FIG. 6 is a cross-sectional view taken along a plane corresponding to line VI-VI in FIG. FIG. 7 is a cross-sectional view taken along a plane corresponding to line VII-VII of FIG. FIG. 8 is a cross-sectional view cut along a plane corresponding to line VIII-VIII of FIG. FIG. 9 is a plan view showing the layout of each chamber of the wastewater treatment apparatus according to the modification.

Exemplary embodiments are described in detail below with reference to the drawings.

FIG. 1 shows a case where a wastewater treatment device 1 according to this embodiment is applied to a housing complex 2. As shown in FIG. This waste water treatment device 1 is a device for treating waste water from the kitchens of each room in a housing complex 2 . A disposer 3 (see FIG. 2) is provided in the kitchen drain of each room. The disposer 3 pulverizes raw garbage such as vegetables and seafood generated by cooking. Garbage (hereinafter referred to as organic solid matter) pulverized by the disposer 3 is discharged as wastewater together with water supplied from the tap. Waste water flows into the waste water treatment device 1 through the drain pipe 4 . A wastewater treatment apparatus 1 is located underground near a housing complex 2 to purify wastewater containing organic solids and discharge it as sewage.

(Wastewater treatment system)
FIG. 2 schematically shows the system of the waste water treatment device 1 according to this embodiment. As shown in FIG. 2, waste water from the disposer 3 through the drain pipe 4 is introduced into the inorganic matter separation chamber 11 . Drainage from kitchens is contaminated with inorganic matter such as egg shells, metal scrubber shavings, and aluminum foil shavings. The inorganic substance separation chamber 11 separates inorganic substances contained in such waste water. In the inorganic matter separation chamber 11, the inorganic matter is removed by precipitating.

The waste water from which the inorganic matter has been removed is introduced into the solid separation chamber 12 through the first transfer section 21 . A solids separation chamber 12 separates organic solids from the waste water. In solid matter separation chamber 12, unsolubilized organic solid matter is separated by settling. The solid separation chamber 12 separates the waste water into the first waste liquid and sludge containing organic solids. Although details will be described later, the solid matter separation chamber 12 is formed by partitioning a part of the mixed waste liquid storage chamber 14, which will be described later, with a partition wall 12b.

A part of the sludge in the solid matter separation chamber 12 and the first waste liquid is introduced into the aerobic solubilization chamber 13 through the first organic matter transfer section 31 . In the aerobic solubilization chamber 13, the sludge is solubilized by the activated sludge method. Although not shown in FIG. 2, the aerobic solubilization chamber 13 is provided with a blower 131 (see FIG. 7) for aeration. This blower 131 is configured to intermittently supply oxygen. Transfer of sludge from the solid matter separation chamber 12 is performed while the blower 131 is stopped. Sludge is transferred from the solid separation chamber 12 several times a day depending on the capacity of the aerobic microorganisms contained in the sludge.

The aerobic solubilization chamber 13 solubilizes and liquefies the organic matter in the sludge to generate a second waste liquid. This second waste liquid is returned to the solid separation chamber 12 through the waste liquid reflux section 22 . The waste liquid reflux unit 22 is configured to reflux the supernatant liquid of the second waste liquid to the solid matter separation chamber 12 . Specifically, when the sludge is transferred from the solid matter separation chamber 12 to the aerobic solubilization chamber 13, the water level of the second waste liquid rises. The second waste liquid is recirculated to the solid separation chamber 12 by the amount of this water level rise (that is, by the amount of overflow).

Excess sludge after activated sludge treatment is accumulated in the aerobic solubilization chamber 13 . This excess sludge is withdrawn from the aerobic solubilization chamber 13 at a predetermined timing (for example, once a month).

By refluxing the second waste liquid from the aerobic solubilization chamber 13 , the first waste liquid and the second waste liquid are mixed in the solid matter separation chamber 12 to generate a mixed waste liquid. This mixed waste liquid is stored in the mixed waste liquid storage chamber 14 . An opening 12c is formed in the partition wall 12b of the solid separation chamber 12, and the mixed waste liquid produced in the solid separation chamber 12 is introduced into the mixed waste liquid storage chamber 14 through the opening 12c. . The mixed waste liquid storage chamber 14 is formed to have a volume larger than that of the solid separation chamber 12 . As a result, the first waste liquid and the second waste liquid are mixed more uniformly in the mixed waste liquid storage chamber 14, and the water quality of the mixed waste liquid is such that the water quality of the first waste liquid and the water quality of the second waste liquid are averaged. become watery. A part of this mixed waste liquid is introduced into the aerobic filter bed chamber 15 via the second transfer section 23 . Sludge may enter the mixed waste liquid storage chamber 14 through the opening 12c. This sludge accumulates at the bottom of the mixed waste liquid storage chamber 14 . This sludge is transferred to the aerobic solubilization chamber 13 via the second organic substance transfer section 32 .

Introduction of the mixed waste liquid from the mixed waste liquid storage chamber 14 to the aerobic filter bed chamber 15 is performed at the timing when the second waste liquid is refluxed to the solid matter separation chamber 12 . That is, the mixed waste liquid is introduced into the mixed waste liquid storage chamber 14 by refluxing the second liquid waste to the solid matter separation chamber 12, and the water level of the mixed waste liquid storage chamber 14 rises. Only the amount of this water level rise (that is, the amount of overflow) is introduced into the aerobic filter bed chamber 15 . If only the overflow portion of the mixed waste liquid in the mixed waste liquid storage chamber 14 is introduced into the aerobic filter bed chamber 15, the timing at which the second waste liquid is recirculated from the aerobic solubilization chamber 13 and the mixed waste liquid storage chamber 14 to the aerobic filter bed chamber 15 can be synchronized with the timing of transfer of the mixed waste liquid.

In the aerobic filter bed chamber 15, the mixed waste liquid is treated by biofilm treatment using aerobic microorganisms. The aerobic filter bed chamber 15 is provided with a carrier 15a that retains aerobic microorganisms. The carrier 15a is made of polyvinyl alcohol, polyethylene glycol, polyurethane, or the like, and has aerobic microorganisms attached to its surface. Although not shown in FIG. 2, the aerobic filter bed chamber 15 is also provided with a blower 151 (see FIG. 6) for supplying oxygen to aerobic microorganisms.

Treated water, which is a mixed waste liquid that has undergone biofilm treatment in the aerobic filter bed chamber 15 , is introduced into the final separation chamber 16 . In the final separation chamber 16, residual organic matter in the treated water is precipitated and separated. The separated sludge containing residual organic matter is transferred to the aerobic solubilization chamber 13 via the third organic matter transfer section 33 . The treated water from which the residual organic matter has been separated is discharged to the sewage system as discharged water through the water discharge pipe 5 .

(Configuration of wastewater treatment equipment)
Next, a specific configuration of the waste water treatment apparatus 1 will be described with reference to FIGS. 3 to 8. FIG. In the following description, up, down, front, rear, left, and right follow the arrows shown in FIGS. 3-8. This is shown for convenience in order to simplify the explanation, and does not limit the arrangement of the chambers 11 to 16 when implemented.

As shown in FIG. 3, chambers 11 to 16 are formed by partitioning the inner space of a box-shaped housing 100 in the front-rear direction and in the left-right direction. In this example, a drain pipe 4 is connected to the front side, and a drain pipe 5 is connected to the left side.

A plurality of partition walls 101 to 105 are erected inside the housing 100, and the partition walls partition the respective chambers 11 to 16. As shown in FIG. Specifically, as shown in FIG. 4, the inorganic substance separation chamber 11 and the mixed waste liquid storage chamber 14 are partitioned by a first partition wall 101 extending in the left-right direction, and the mixed waste liquid storage chamber 14 and the aerobic solubilization chamber 13 are separated from each other. is partitioned by a second partition wall 102 extending in the front-back direction, and the mixed waste liquid storage chamber 14 and the aerobic filtration bed chamber 15 are partitioned by a third partition wall 103 extending in the left-right direction, and the aerobic filtration bed chamber 15 and the final separation chamber 16 are partitioned by a fourth partition wall 104 extending in the front-rear direction. The aerobic filtration bed chamber 15 and the final separation chamber 16 and the aerobic solubilization chamber 13 are partitioned by a fifth partition wall 105 that continues from the third partition wall 103 and spreads in the left-right direction. The housing 100 and the first to fifth partition walls 101 to 105 are integrally formed and made of fiber reinforced plastic, for example.

As shown in FIG. 4, the solid separation chamber 12 is provided within the mixed waste liquid storage chamber 14 . Specifically, as shown in FIG. 5, a tank body 120 configured separately from the housing 100 is arranged in the mixed waste liquid storage chamber 14 so as to be adjacent to the inorganic separation chamber 11. It is configured. The tank body 120 is made of fiber-reinforced plastic. A rear portion of the peripheral wall of the tank body 120 serves as a partition wall 12b that separates the solid separation chamber 12 and the mixed waste liquid storage chamber 14 from each other. Among the peripheral walls of the tank body 120, the front portion is arranged along the first partition wall 101, the left portion is arranged along the second partition wall 102, and the right portion is arranged along the side wall of the housing 100. there is In this embodiment, the front and upper corners of the tank body 120 are notched. Thereby, even when the first transfer section 21 is attached to the first partition wall 101, the tank body 120 can be easily installed.

By forming the chambers 11 to 16 in this way, as shown in FIG. It is adjacent to the chamber 13 in the left-right direction with the second partition wall 102 interposed therebetween. The solid matter separation chamber 12 is arranged at the end of the mixed waste liquid storage chamber 14 opposite to the aerobic filter bed chamber 15 in the longitudinal direction. The mixed waste liquid storage chamber 14 is laterally adjacent to the aerobic solubilization chamber 13 with the second partition wall 102 interposed therebetween, and adjacent to the aerobic filter floor chamber 15 longitudinally with the third partition wall 103 interposed therebetween. The final separation chamber 16 is adjacent to the aerobic solubilization chamber 13 in the longitudinal direction with the fifth partition wall 105 interposed therebetween, and adjacent to the aerobic floor chamber 15 in the lateral direction with the fourth partition wall 104 interposed therebetween. The left-right direction corresponds to the first direction, and the front-rear direction corresponds to the second direction.

As shown in FIGS. 4 and 6 , the inorganic substance separation chamber 11 is partitioned by the side wall of the housing 100 and the first partition wall 101 . A drain pipe 4 penetrates into the inorganic substance separation chamber 11 from the outside of the housing 100 . The outflow port 4 a of the drain pipe 4 opens toward the front side, ie, the side opposite to the solid separation chamber 12 . The inorganic substance separation chamber 11 has a smaller volume than the other chambers. In particular, it is formed shallower than the other chambers. This small volume is not a problem because the inorganic matter in the wastewater is relatively small. An air diffuser 111 is arranged in the inorganic substance separation chamber 11 . The diffuser pipe 111 aerates the interior of the room to suppress bad odors and stirs the organic solid matter in the room with the air.

The inorganic matter separation chamber 11 and the solid matter separation chamber 12 are communicated with each other by the first transfer section 21 . The first transfer section 21 is composed of a large-diameter pipe. The inflow portion 21a of the first transfer portion 21 passes through the first partition wall 101, is fixed to the upper portion of the first partition wall 101, and opens forward. The first transfer section 21 transfers the overflow of waste water containing organic solids in the inorganic matter separation chamber 11 to the solid matter separation chamber 12 . Since the inorganic separation chamber 11 is made shallow, it is possible to suppress the deposition of organic solids in the inorganic separation chamber 11, and the transfer of waste water from the inorganic separation chamber 11 to the solid separation chamber 12, particularly the organic Efficient transfer of solids. The outflow part 21b of the first transfer part 21 is located inside the solid separation chamber 12 and extends vertically. The upper end of the outflow portion 21b opens upward. The outflow port 21c provided at the lower end of the outflow portion 21b is positioned below the lower end of the opening 12c of the solid separation chamber 12 and opens downward. This makes it easier to move the organic solids toward the bottom of the solid separation chamber 12, and prevents the organic solids from being transferred to the mixed waste liquid storage chamber 14 through the opening 12c. In addition, direct transfer of the first waste liquid to the mixed waste liquid storage chamber 14 is suppressed.

As shown in FIG. 7, the bottom of the solid separation chamber 12 has inclined surfaces 12a on both left and right sides that are inclined downward toward the center in the width direction. That is, the bottom portion of the solid separation chamber 12 has a tapered shape in which the width in the left-right direction becomes narrower toward the bottom. A gap S is formed between the inclined surface 12 a of the solid separation chamber 12 and the bottom and right side wall of the housing 100 and between the inclined surface 12 a and the second partition wall 102 . This gap S is a part of the mixed waste liquid storage chamber 14, and the mixed waste liquid is stored in this gap S as well. Since the inclined surface 12 a is also part of the partition wall 12 b , the gap S between the inner wall of the housing 100 and the partition wall 12 b can be said to be part of the mixed waste liquid storage chamber 14 .

An air lift pump is provided as the first organic matter transfer section 31 in the solid matter separation chamber 12 . The inlet 31a of the first organic substance transfer section 31 is located above the bottom of the solid separation chamber 12 and opens downward. Since the amount of accumulated organic solid matter in the solid matter separation chamber 12 is relatively large, if the inflow port 31a is arranged along the bottom of the solid matter separation chamber 12, the first organic matter transfer section 31 may be blocked. For this reason, the inflow port 31a is positioned above the bottom of the solid separation chamber 12 and is opened downward to prevent the first organic substance transfer section 31 from being blocked. The first organic matter transfer section 31 extends to the aerobic solubilization chamber 13 through the upper side of the second partition wall 102 .

As shown in FIGS. 6 and 7, the opening 12c, which is the communication portion between the solid separation chamber 12 and the mixed waste liquid storage chamber 14, is located above the vertical center and below the upper end of the partition wall 12b. formed on the side. As a result, the upper part of the partition wall 12b is positioned above the opening 12c. Therefore, the transfer of the mixed waste liquid from the solid matter separation chamber 12 to the mixed waste liquid storage chamber 14 is performed in the liquid. From the solid matter separation chamber 12, not the supernatant liquid of the mixed waste liquid generated in the solid matter separation chamber 12, but the intermediate portion of the mixed waste liquid located slightly below the supernatant liquid is transferred to the mixed waste liquid storage chamber 14. be. As a result, organic solid matter (hereinafter referred to as scum) floating on the liquid surface in the solid matter separation chamber 12 is prevented from being transferred to the mixed waste liquid storage chamber 14 . More specifically, as described above, since the inlet 31a of the first organic matter transfer section 31 is located above the bottom of the solid matter separation chamber 12, remains old organic solids. Since air is not sent to the solid matter separation chamber 12 except for the first organic matter transfer section 31, anaerobic microorganisms propagate in the old organic solid matter, and the old organic solid matter is treated by the anaerobic microorganisms. Due to the treatment of anaerobic microorganisms, gases such as carbon dioxide and ammonia adhere to the surroundings of old organic solids, forming scum that floats on the surface of the liquid. If the partition wall 12b is located above the opening 12c, the upper portion of the partition wall 12b functions as a blocking wall that blocks the outflow of scum, thereby suppressing the outflow of the scum into the mixed waste liquid storage chamber 14. . In this embodiment, the front and upper corners of the tank body 120 are notched, but the notched portions are filled with the side wall of the housing 100 and the second partition wall 102. Therefore, the scum does not flow out to the mixed waste liquid storage chamber 14 through the notch.

After reaching the liquid surface of the solid separation chamber 12, the scum is deposited again in the solid separation chamber 12 by releasing the adhering gas into the air. As a result, the old organic solids are positioned on the upper surface side among the organic solids deposited in the solid separation chamber 12, so that they are transferred to the aerobic solubilization chamber 13 by the first organic transfer section 31. become.

As shown in FIG. 4, the aerobic solubilization chamber 13 is partitioned by the side wall of the housing 100, the second partition wall 102, and the fifth partition wall 105. As shown in FIG. In the aerobic solubilization chamber 13, an outflow portion 31b of the first organic matter transfer portion 31, an outflow portion 32b of the second organic matter transfer portion 32, and an outflow portion 33b of the third organic matter transfer portion 33 are positioned. As shown in FIG. 7 , the outflow part 31 b of the first organic substance transfer part 31 is positioned higher than the liquid surface of the aerobic solubilization chamber 13 . Although not shown, the outflow portion 32b of the second organic matter transfer portion 32 and the outflow portion 33b of the third organic matter transfer portion 33 are also positioned higher than the liquid surface of the aerobic solubilization chamber 13. . By placing the aerobic solubilization chamber 13 adjacent to each of the solid matter separation chamber 12, the mixed waste liquid storage chamber 14, and the final separation chamber 16, which are chambers that require the transfer of organic solids, the first to third organic substances The transferring parts 31 to 33 can be shortened as much as possible, and the waste water treatment apparatus 1 can be made compact.

A blower 131 for sending air is arranged in the aerobic solubilization chamber 13 . A blower 131 is positioned along the bottom of the aerobic solubilization chamber 13 to aerate all organic solids transferred to the aerobic solubilization chamber 13 .

A first filter portion 13a is provided in the right region of the aerobic solubilization chamber 13, that is, the region adjacent to the solid matter separation chamber 12 and the mixed waste liquid storage chamber 14. As shown in FIG. This first filter part 13a is for suppressing the outflow of sludge when the second waste liquid produced by solubilizing the organic solids is recirculated from the aerobic solubilization chamber 13 to the solid matter separation chamber 12. area. A member forming the first filter portion 13 a is fixed to the second partition wall 102 .

An inflow portion 22 a of the waste liquid reflux portion 22 passes through the second partition wall 102 and is fixed to the upper portion of the second partition wall 102 . The waste liquid reflux unit 22 refluxes the overflow portion of the second waste liquid generated in the aerobic solubilization chamber 13 to the solid matter separation chamber 12 . The outflow part 22b of the waste liquid reflux part 22 is located inside the solid separation chamber 12 and extends in the vertical direction. The upper end of the outflow portion 22b is open upward. The outflow port 22c provided at the lower end of the outflow portion 22b is located below the lower end of the opening 12c of the solid separation chamber 12 and opens downward. This prevents the second waste liquid from being directly transferred to the mixed waste liquid storage chamber 14 through the opening 12c.

The mixed waste liquid storage chamber 14 is partitioned by the side wall of the housing 100 , the first partition wall 101 , the second partition wall 102 and the third partition wall 103 . Since the mixed waste liquid storage chamber 14 extends over the entire area where the tank body 120 is not arranged, the volume is relatively large. Therefore, the retention time of the mixed waste liquid in the mixed waste liquid storage chamber 14 becomes longer, and a small amount of organic solid matter and a part of the scum that pass through the opening 12c in the mixed waste liquid storage chamber 14 are precipitated and separated. be. In addition, since the volume of the mixed waste liquid that can be stored increases due to the large volume, even if one of the first waste liquid and the second waste liquid is slightly less or more, the water quality of the mixed waste liquid is hardly affected. As a result, the water quality of the mixed waste liquid in the mixed waste liquid storage chamber 14 is stabilized by sufficiently averaging the water quality of the first waste liquid and the water quality of the second waste liquid.

As shown in FIGS. 4 and 6 , an air lift pump is provided as the second organic transfer section 32 in the mixed waste liquid storage chamber 14 . The inflow port 32a of the second organic substance transfer section 32 is located at the bottom of the mixed waste liquid storage chamber 14 and opens toward the right side. Since only a small amount of organic solid matter and a part of scum that pass through the opening 12c are deposited in the mixed waste liquid storage chamber 14, the deposition amount is relatively small. Therefore, even if the inflow port 32a is arranged along the bottom of the mixed waste liquid storage chamber 14, the possibility of clogging is considerably small. The second organic transfer section 32 extends to the aerobic solubilization chamber 13 through the upper side of the second partition wall 102 .

The mixed waste liquid storage chamber 14 and the aerobic filter bed chamber 15 are communicated with each other by the second transfer section 23 . The second transfer section 23 is composed of a large-diameter pipe. The second transfer unit 23 transfers the overflow portion of the mixed waste liquid stored in the mixed waste liquid storage chamber 14 to the aerobic filter bed chamber 15 .

An inflow portion 23 a of the second transfer portion 23 extends vertically within the mixed waste liquid storage chamber 14 . The upper end of the inflow portion 23a opens upward. The inflow port 23b provided at the lower end of the inflow portion 23a is positioned at the same height as the lower end of the opening 12c. As a result, even if the liquid surface of the solid matter separation chamber 12 is positioned below the upper end of the opening 12c and scum enters the mixed waste liquid storage chamber 14, the scum will be transferred from the inlet 23b to the second transfer portion. Inflow into 23 can be suppressed.

The aerobic filter bed chamber 15 is partitioned by the side wall of the housing 100, the third partition wall 103, the fourth partition wall 104, and the fifth partition wall 105, as shown in FIG. The aerobic filter bed chamber 15 is divided into two chambers by a partition wall 15b. The two chambers communicate with each other through a communication hole 15c formed in the upper portion of the partition wall 15b. As a result, each chamber is easily filled with the mixed waste liquid, and the entire carrier 15a is immersed in the mixed waste liquid.

The outflow part 23 c of the second transfer part 23 is arranged in one of the aerobic filter bed chambers 15 . As shown in FIGS. 6 and 8, the outflow part 23c extends to near the bottom of the aerobic filter bed chamber 15. As shown in FIGS. This prevents untreated mixed waste liquid from flowing into the other aerobic filter bed chamber 15 through the communication hole 15c. Further, the mixed waste liquid discharged from the outflow part 23c flows toward the communication hole 15c formed near the upper end, so that the mixed waste liquid easily passes through the inside of the carrier 15a of one of the chambers. As a result, the overflow of the mixed waste liquid purified in one chamber flows into the other chamber through the communication hole 15c, so that biofilm treatment is performed twice.

Each chamber of the aerobic filter bed chamber 15 is provided with a blower 151 for sending air. A blower 151 is arranged along the bottom of the aerobic bed chamber 15 .

The final separation chamber 16 is partitioned by the side wall of the housing 100 , the fourth partition wall 104 and the fifth partition wall 105 . Although not shown, a communication hole is formed in the upper portion of the fifth partition wall 105 to allow the aerobic filter bed chamber 15 and the final separation chamber 16 to communicate with each other. flows into the final separation chamber 16 through the communication hole.

As shown in FIGS. 4 and 8, in the final separation chamber 16, an air lift pump is provided as the third organic matter transfer section 33. As shown in FIG. The inflow port 33a of the third organic matter transfer section 33 is located at the bottom of the final separation chamber 16 and opens toward the left. The amount of deposition in the final separation chamber 16 is rather low, since only a small amount of residual organic matter is deposited. Therefore, even if the inlet 33a is arranged along the bottom of the final separation chamber 16, the possibility of clogging is considerably small. The third organic transfer section 33 extends to the aerobic solubilization chamber 13 through the upper side of the fifth partition wall 105 .

A second filter section 16 a is provided in the upper portion of the final separation chamber 16 . The second filter portion 16a is a filter for suppressing discharge of residual organic matter. A member forming the second filter portion 16 a is fixed to the side wall of the housing 100 .

A water discharge pipe 5 is provided at the position of the second filter portion 16a. From the water discharge pipe 5, the supernatant liquid after passing through the second filter portion 16a is discharged as discharged water.

Therefore, in the present embodiment, the solid separation chamber 12 separates the wastewater into the organic solids and the first waste liquid, and the first organic transfer chamber 12 transfers the sludge containing the organic solids separated in the solid separation chamber 12. an aerobic solubilization chamber 13 that solubilizes the sludge transferred by the first organic substance transfer unit 31 by an activated sludge method to generate a second waste liquid; A waste liquid reflux unit 22 for returning the waste liquid to the solid matter separation chamber 12, a mixed waste liquid storage chamber 14 communicating with the solid matter separation chamber 12 and storing a mixed waste liquid of the first waste liquid and the second waste liquid, and a mixed waste liquid storage chamber. and an aerobic filter bed chamber 15 for treating the mixed waste liquid transferred from 14 by biofilm treatment using aerobic microorganisms, the aerobic solubilization chamber 13, the mixed waste liquid storage chamber 14, and the aerobic filter bed The chamber 15 is partitioned by partitioning the internal space of the housing 100, and the solid separation chamber 12 is formed by partitioning a part of the mixed waste liquid storage chamber 14 with a partition wall 12b, A gap S between the inner wall of the housing 100 and the partition wall 12 b is part of the mixed waste liquid storage chamber 14 . As a result, the mixed waste liquid storage chamber 14 can be made as wide as possible while narrowing the solid matter separation chamber 12 in which the organic solid matter accumulates. In addition, since the organic solid matter separated in the solid matter separation chamber 12 is transferred to the aerobic solubilization chamber 13 by the first organic matter transfer section 31, the organic solid matter does not accumulate excessively in the solid matter separation chamber 12. no. Therefore, it is not necessary to increase the size of the waste water treatment apparatus 1 while forming a chamber for efficiently collecting organic solid matter. In addition, since organic solid matter is mainly transferred to the aerobic solubilization chamber 13, it is possible to mainly treat organic solid matter that needs to be solubilized, and the efficiency of activated sludge treatment can be improved. As described above, the waste water treatment efficiency can be increased as much as possible while suppressing the waste water treatment apparatus 1 from increasing in size.

Further, in the present embodiment, the bottom of the solid separation chamber 12 has an inclined surface 12a, and the gap S formed between the inclined surface 12a and the housing 100 outside the solid separation chamber 12 is It is part of the mixed waste liquid storage chamber 14 . This facilitates the collection of organic solids in the solids separation chamber 12 . Further, since the gap S between the inclined surface 12a and the housing 100 is part of the mixed waste liquid storage chamber 14, even if the inclined surface 12a is provided at the bottom of the solid separation chamber 12, a dead space is formed. not. Therefore, even if the volume of the solid separation chamber 12 is reduced by the amount of the inclined surface 12a, the volume of the mixed waste liquid storage chamber 14 is increased by that amount. As a result, the mixed waste liquid flowing out of the solid separation chamber 12 can be sufficiently stored without enlarging the horizontal size of the mixed waste liquid storage chamber 14 . From the above, it is possible to more effectively suppress the enlargement of the waste water treatment apparatus 1 .

Further, in this embodiment, the solid matter separation chamber 12 is configured by a tank body 120 that is separate from the housing 100 . Thereby, the size of the solid separation chamber 12 can be changed according to the situation in which the wastewater treatment apparatus 1 is installed. For example, in an apartment complex with a large number of households, the tank body 120 can be made larger so that the solid matter separation chamber 12 can be designed to be relatively large. Since the solid matter separation chamber 12 is formed in a part of the mixed waste liquid storage chamber 14, it is not necessary to increase the size of the housing 100 even if the tank body 120 is increased in size. Further, since the solid separation chamber 12 communicates with the mixed waste liquid storage chamber 14 through the opening 12c, even if the tank body 120 is enlarged, a sufficient volume for storing the mixed waste liquid can be secured. For these reasons, even when there is a large amount of organic solid matter, the organic solid matter can be collected in the solid matter separation chamber without enlarging the waste water treatment apparatus 1, and the quality of the mixed waste liquid can be stabilized. can be done. As a result, it is possible to more effectively suppress an increase in the size of the waste water treatment apparatus 1 and further improve the waste water treatment efficiency.

Further, in the present embodiment, the second organic matter transfer section 32 is provided for transferring the organic solid matter deposited in the mixed waste liquid storage chamber 14 to the aerobic solubilization chamber 13, and the mixed waste liquid storage chamber 14 is aerobic in the left-right direction. The solid matter separation chamber 12 is arranged adjacent to the solubilization chamber 13 and adjacent to the aerobic filter bed chamber 15 in the front-rear direction. It is located at the end opposite to the filter bed chamber 15 . As a result, since the mixed waste liquid storage chamber 14 is adjacent to both the aerobic solubilization chamber 13 and the aerobic filtration bed chamber 15, the solid matter separation chamber 12 can be located far and preferably from the aerobic filtration bed chamber 15. It can be positioned close to the gas solubilization chamber 13 . As a result, the first organic matter transfer section 31 and the second organic matter transfer section 32 can be made as small as possible, and the configuration for transferring the mixed waste liquid from the mixed waste liquid storage chamber 14 to the aerobic filter bed chamber 15 can be made compact and compact. can be simplified. In addition, it is possible to prevent the first waste liquid and the second waste liquid that are not sufficiently mixed from the solid matter separation chamber 12 from flowing into the aerobic filter bed chamber 15 . As a result, it is possible to more effectively suppress an increase in the size of the waste water treatment apparatus 1 and further improve the waste water treatment efficiency.

In addition, in this embodiment, the final separation chamber 16 for separating the residual organic matter remaining in the treated water treated in the aerobic filter bed chamber 15 from the treated water, and the residual organic matter deposited in the final separation chamber 16 are preferably separated from the treated water. and a third organic transfer section 33 for transferring to the aerobic solubilization chamber 13 , and the final separation chamber 16 is arranged adjacent to both the aerobic solubilization chamber 13 and the aerobic bed chamber 15 . As a result, the final separation chamber 16 can be arranged in the space formed between the aerobic solubilization chamber 13 and the aerobic filtration bed chamber 15 in the internal space of the housing 100, and the final separation chamber 16 is formed. Therefore, it is not necessary to increase the size of the waste water treatment device 1 in the horizontal direction. Further, since the final separation chamber 16 and the aerobic solubilization chamber 13 are adjacent to each other, the third organic matter transfer section 33 can be made as small as possible. In addition, by removing the residual organic matter, the water quality of the effluent can be made appropriate. As a result, it is possible to more effectively suppress an increase in the size of the waste water treatment apparatus 1 and further improve the waste water treatment efficiency.

FIG. 9 shows a modification of the waste water treatment device 1 according to this embodiment. In this modification, the final separation chamber 16 is adjacent to the aerobic filter bed chamber 15 in the longitudinal direction and adjacent to the aerobic solubilization chamber 13 in the lateral direction. Further, the width of the tank body 120 constituting the solid separation chamber 12 in the left-right direction is narrower than the width of the mixed waste liquid storage chamber 14 in the left-right direction. A space is formed between the second partition wall 102 and the tank body 120 . This space is part of the mixed waste liquid storage chamber 14 . Also, although detailed illustration is omitted, in this configuration, the front and upper portions of the tank body 120 are not cut out. This is to prevent scum from flowing into the mixed waste liquid storage chamber 14 from the notch.

Even with such a configuration, by arranging the chambers 11 to 16 two-dimensionally, the waste water treatment apparatus 1 can be made compact.

(Other embodiments)
The technology disclosed herein is not limited to the above-described embodiments, and substitutions are possible without departing from the scope of the claims.

For example, in the above-described embodiment, the chambers 11-16 are formed by partitioning the box-shaped housing 100 with a plurality of partition walls 101-105. Alternatively, the chambers 11 to 16 may be configured by providing a partition wall in a cylindrical housing. In this case, for example, the final separation chamber 16 may be configured not to be adjacent to the aerobic solubilization chamber 13 but to be adjacent only to the aerobic filtration bed chamber 15 .

Further, in the above-described embodiment, the solid matter separation chamber 12 is configured by arranging the tank body 120 which is separate from the housing 100 in the mixed waste liquid storage chamber 14 . The configuration is not limited to this, and the housing 100 may be configured by partitioning a portion of the housing 100 with a partition wall in the same manner as other chambers. In this configuration, an opening is formed in the partition wall between the solid separation chamber 12 and the mixed waste liquid storage chamber 14 .

The above-described embodiments are merely examples, and should not be construed as limiting the scope of the present disclosure. The scope of the present disclosure is defined by the claims, and all modifications and changes within the equivalent range of the claims are within the scope of the present disclosure.

The technology disclosed herein is useful as a wastewater treatment apparatus for purifying and discharging wastewater containing organic solids.

1 Waste water treatment device 12 Solid matter separation chamber 12b Partition wall 13 Aerobic solubilization chamber 14 Mixed waste liquid storage chamber 15 Aerobic filter bed chamber (aerobic treatment chamber)
22 waste liquid reflux unit 31 first organic matter transfer unit

Claims (5)

A wastewater treatment device for purifying and discharging wastewater containing organic solids,
a solids separation chamber for separating the wastewater into the organic solids and a first waste liquid;
a first organic transfer section for transferring sludge containing the organic solids separated in the solid separation chamber;
a solubilization chamber for solubilizing the sludge transferred by the organic substance transfer section by an activated sludge method to generate a second waste liquid;
a waste liquid reflux unit for refluxing the second waste liquid in the solubilization chamber to the solid separation chamber;
a mixed waste liquid storage chamber communicating with the solid matter separation chamber and storing a mixed waste liquid of the first waste liquid and the second waste liquid;
an aerobic treatment chamber for treating the mixed waste liquid transferred from the mixed waste liquid storage chamber by biofilm treatment using aerobic microorganisms;
The solubilization chamber, the mixed waste liquid storage chamber, and the aerobic treatment chamber are partitioned by partitioning the internal space of the housing,
The solid matter separation chamber is formed by partitioning a part of the mixed waste liquid storage chamber with a partition wall,
A wastewater treatment apparatus according to claim 1, wherein a gap between the inner wall of the housing and the partition wall is part of the mixed waste liquid storage chamber. In the wastewater treatment equipment according to claim 1,
The bottom of the solid matter separation chamber has an inclined surface,
A wastewater treatment apparatus according to claim 1, wherein a space formed between the inclined surface and the housing outside the solid separation chamber is part of the mixed waste liquid storage chamber. In the wastewater treatment equipment according to claim 1 or 2,
A waste water treatment apparatus, wherein the solid matter separation chamber is composed of a tank body separate from the housing. In the wastewater treatment equipment according to any one of claims 1 to 3,
further comprising a second organic substance transfer section for transferring the organic solids deposited in the mixed waste liquid storage chamber to the solubilization chamber;
The mixed waste liquid storage chamber is arranged adjacent to the solubilization chamber in a first direction orthogonal to the vertical direction, and the aerobic treatment is performed in a second direction orthogonal to the vertical direction and intersecting the first direction. Located adjacent to the room,
The waste water treatment apparatus, wherein the solid matter separation chamber is positioned at the end of the mixed waste liquid storage chamber opposite to the aerobic treatment chamber in the second direction. In the wastewater treatment equipment according to claim 4,
a downstream separation chamber for separating residual organic matter remaining in treated water treated in the aerobic treatment chamber from the treated water;
a third organic matter transfer unit that transfers the residual organic matter deposited in the downstream separation chamber to the solubilization chamber;
The downstream separation chamber is arranged adjacent to the solubilization chamber in one of the first direction and the second direction and adjacent to the aerobic treatment chamber in the other direction. wastewater treatment equipment.