JP2012081396A - Treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment device having excellent purification capacity.SOLUTION: The treatment device is to be embedded in soil 272, and includes an embedded path 220 for dispersing pretreated sewage in the soil 272. The embedded path 220 is constituted of a box 10 containing a plurality of triangular openings 15 formed of a plurality of ribs combined to form triangles and having up and down and left and right resin walls 11-13 including an opening with an opening area 5-100 cm. Through the opening 15, a water spraying member 5 inside and water permeable sheets 31 and 32 outside can be efficiently made to be in contact.

Description

  The present invention relates to a device for dispersing pretreated sewage in soil (infiltration permeation).

  In Patent Document 1, bristle fibers are filled in a tubular body made of a water absorbent sheet, a water permeable pipe is disposed at the center thereof, and a plurality of blades made of a water absorbent sheet are formed on the side of the tubular body. In the sewage infiltration processing apparatus in which a piece is formed to protrude, a protruding piece made of a water-absorbing sheet having a length of 0.5 to 6 cm is erected upward at a position where the blade piece protrudes from the tubular body. A sewage infiltration processing device is described.

JP 2006-305534 A

  A tubular body made of a water absorbent sheet was filled with bristle fibers, a water permeable pipe was disposed at the center thereof, and a plurality of wing pieces made of a water absorbent sheet were formed to protrude from the side of the tubular body. In the sewage infiltration treatment apparatus, filthy water is infiltrated into the air-permeable soil from the bristle fiber by siphon phenomenon and / or capillary action, and biooxidation (aerobic decomposition) is efficiently performed by soil microorganisms. At the same time, the treated sewage is evaporated by soil surface evaporation and water uptake by plant roots.

  In order to infiltrate water from the bristle fiber into the breathable soil by capillary action or the like, the bristle fiber, the water-absorbent sheet, and the soil (soil) need to be in proper contact (close contact). A synthetic fiber nonwoven fabric is preferable, and a polyester nonwoven fabric having a thickness of about 1 to 10 mm is particularly preferably used. As the bristle fibers, bristle fibers made of synthetic fibers are preferably used, and in particular, polyester bristle fibers of 500 to 3000 denier are preferably used. Therefore, the strength of the tubular body made of the water-absorbent sheet is relatively small, and when the earth is too thick or when the soil is pressurized in order to increase the contact efficiency with the soil, excessive earth pressure acts on the tubular body, and the tubular body May be crushed or deformed.

  When the tubular body is crushed or deformed, the gap between the bristle fibers inside becomes small, causing clogging and inhibiting the flow of sewage. Although the longitudinal flow of the tubular body may be secured by using a highly rigid water-permeable pipe, the bristle fibers inside are compressed, and the cross-sectional direction of the tubular body, that is, the direction infiltrating sewage into the soil. The flow is obstructed, and it can no longer play a role in dispersing sewage in the soil.

One embodiment of the present invention is a treatment apparatus including a buried path that is embedded in soil and disperses pretreated sewage in the soil. The embedding path of this processing apparatus is a plurality of triangular openings formed by a plurality of ribs combined so as to form a triangle, and the upper, lower, left and right walls made of resin including openings having an opening area of 5 to 100 cm ² A fibrous sprinkling member filled in a space formed by upper, lower, left, and right walls, and a water permeable sheet that covers the upper, lower, left, and right walls, and part of the water permeable sheet extends from the buried path into the soil. And a water-impervious sheet that covers the lower side of the buried path outside the water-permeable sheet that covers the upper, lower, left, and right walls.

  This buried path includes upper, lower, left, and right walls made of resin that are relatively resistant to pressure from various directions due to a plurality of ribs combined to form a triangle. For this reason, even if the situation where earth pressure becomes somewhat large occurs, it is possible to suppress the buried path from being crushed or greatly deformed by the upper, lower, left and right walls. For this reason, it can suppress that the water sprinkling member inside an embedding path is crushed, can hold | maintain the state which has a suitable clearance gap in a fibrous water sprinkling member, and can ensure the space where sewage distribute | circulates.

Further, the upper, lower, left and right walls are formed with a plurality of relatively large triangular openings by a plurality of ribs combined so as to form a triangle, and the opening area thereof is set to ⁵ to 100 cm ² . If the opening area is too small, the upper, lower, left and right walls will inhibit the water spray member and the water permeable sheet from coming into contact with each other. However, if the opening has an area in this range, it is relatively easy for the water sprinkling member to protrude from the opening or the water-permeable sheet to enter the opening. For this reason, a water spray member and a water permeable sheet are easy to contact, and dirty water can be efficiently disperse | distributed to soil via a water spray member and a water permeable sheet.

The opening area of the upper, lower, left and right walls is more preferably 10 to 50 cm ² . The wall strength can be further improved by increasing the number of ribs. Moreover, a water spray member and a water-permeable sheet can be contacted still more efficiently by enlarging opening area.

  The buried path may further include a water permeable pipe arranged to penetrate the water sprinkling member in the direction in which the buried path extends. This buried path has high and low vertical and horizontal walls. Therefore, it is less likely to be deformed due to earth pressure, and even without a water-permeable pipe, it is possible to ensure circulation in the extending direction (longitudinal direction) of the buried path with only watering members housed inside the upper, lower, left and right walls. Further, by omitting the water-permeable pipe, the sewage flows while contacting or colliding with the water sprinkling member, and it becomes easy to be purified by bacteria or micro-organisms attached to the water sprinkling member.

  Another aspect of the present invention is a sewage treatment apparatus having the above treatment apparatus and a pretreatment apparatus for anaerobically treating the sewage supplied to the treatment apparatus. Anaerobic treatment can be performed by pre-processing, and aerobic processing can be performed by the post-processing apparatus. For this reason, sewage can be decomposed | disassembled more efficiently and can be disperse | distributed to soil.

One of the other different aspects of the present invention is a resin panel that forms upper, lower, left, and right walls of a buried path for dispersing pretreated sewage in soil. These panels have a plurality of triangular openings formed by a plurality of ribs combined so as to form a triangle, and the opening area of the openings is 5 to 100 cm ² . It is desirable opening area of the opening is 10 to 50 cm ^2, the opening area is 10 to 30 cm ² is more preferable.

It is sectional drawing which shows the outline | summary of a sewage treatment apparatus. It is sectional drawing which shows the structure of a post-processing apparatus. It is sectional drawing which shows the structure of an embedding path (flow path). It is sectional drawing which shows the example from which a buried path differs. It is a figure which shows the panel which comprises the box of a buried path, FIG. 5 (a) is a plane panel, FIG.5 (b) is a side panel, FIG.5 (c) is a partition, FIG.5 (d) is a half size plane. The configuration of the panel is shown. It is a figure which shows a box, Fig.6 (a) is a top view, FIG.6 (b) shows a side view, FIG.6 (c) shows a front view. It is a figure which expand | deploys and shows a mode that an embedment path is assembled. Sectional drawing along the longitudinal direction (direction of a flow path) which shows the structure of a buried path. The figure which shows the state of opening typically.

  FIG. 1 is a sectional view showing a schematic configuration of a sewage treatment apparatus (sewage purification apparatus) according to an embodiment of the present invention. The sewage treatment apparatus 1 includes a pretreatment apparatus 100 that primarily treats sewage, and a post-treatment apparatus (soil treatment apparatus, sewage soil) in which sewage treated by the pretreatment apparatus 100 flows in and secondarily treats them. Apparatus, processing apparatus) 200, a communication unit 300 between the pre-processing apparatus 100 and the post-processing apparatus 200, and a detection unit 400 for checking the state of sewage treated through the post-processing apparatus 200. The communication unit 300 and the detection unit 400 may be omitted depending on the amount of sewage to be processed, conditions, and installation location.

  The pretreatment device 100 includes three areas 110, 120 and 130. The first zone 110 to the third zone 130 are provided inside such that anaerobic bacteria such as methane bacteria reproduce, and the sewage is primarily purified by the anaerobic bacteria. First, the sewage flows into the first area 110 through the sewage inflow pipe 140, and the suspended matter (scum, scum) and the precipitated sludge that settles on the floor are separated. In the second zone 120, scum and precipitated sludge are further separated, and sewage (purified water) purified by anaerobic bacteria flows into the third zone 130.

  The 3rd area 130 is filled with gravel 132 which anaerobic bacteria, such as methane bacteria, adhere to the surface easily. For this reason, purification of sewage is performed more effectively. By filling the plurality of gravels 132, a large plurality of gaps are formed in the third zone 130, and the bacteria easily propagate. Further, a biofilm such as methane bacteria is formed on the surface of the gravel 132. The suspended matter contained in the sewage being purified is adsorbed and easily removed. The size of the gravel 132 is typically about 20 to 30 cm. Further, the shape of the gravel 132 is preferably a shape that has irregularities on the surface and a large contact area, rather than a round and smooth shape.

  Above the gravel 132 in the third zone 130, a breathable soil 172 is covered with a plate (zigzag plate) 134 having a zigzag cross section. The zigzag plate 134 includes a plurality of holes penetrating the plate body, and these holes are not vertically penetrating the main body but bent in the front / rear and left / right directions, and small animals can move through these holes. is there. For example, small animals such as earthworms penetrate between the pebbles 132 through the zigzag board 134. Therefore, in the third area 130, small animals such as earthworms that eat sludge still remaining in the purification progress water can be bred. On the other hand, due to the shape of the zigzag plate 134, the air-permeable soil does not fall down from above, and air, moisture, small animals, and the like can move by refracting the zigzag hole.

  The first area 110 and the second area 120 are covered with breathable soil 172 with a perforated slab plate and a water permeable mat interposed therebetween. When the slab plate is made of porous concrete, it is not necessary to install a water permeable mat. Breathable soil 172 has a high porosity, facilitates the growth of bacteria, and has a characteristic that moisture is easily evaporated. As a material for the breathable soil 172, clinker, which is ash that comes out after burning coal, can be used. It may be a crushed shell or ink. The clinker is not only economical, but also has the advantage of preventing the inflow of rainwater because its surface becomes hard when it rains. The clinker having such properties is also used as a material for the breathable soil used in the post-treatment device 200.

  In the pretreatment device 100, all of the first area 110 to the third area 130 are structured such that the upper part can be ventilated, and further, the breathable soil 172 is disposed thereon. Therefore, the gas generated from the internal sewage of the pretreatment device 100 is discharged through the slab plate and the zigzag plate 134 and discharged to the ground via the wide range of breathable soil 172. For this reason, malodors such as methane gas are easily absorbed by the breathable soil 172, and the malodor is hardly generated.

  One or more lids 180 are installed in the first area 110 and the second area 120 of the pretreatment device 100. For this reason, when non-perishable garbage such as vinyl or rubber is accumulated in the first area 110 and the second area 120, the garbage can be removed through the lid 180. The lid 180, which is normally sealed, is installed in the first area 110 and the second area 120, but not in the third area 130.

  The sewage that has been substantially purified by the anaerobic bacteria and small animals in the pretreatment device 100 flows into the communication unit 300 through the communication pipe 146. The communication unit 300 includes a lid 310 that can be opened and closed upward, and a net-like porous filter 320 provided inside. The filter 320 is typically a filter made of a porous stainless steel plate or a resin plate. The lid 310 is removable, and is used when removing large granular dust remaining in the sewage flowing into the communication unit 300. The net-shaped filter 320 is installed to remove large granular dust in the sewage flowing into the communication unit 300. In other words, the communication unit 300 includes a function of removing large granular dust or the like before flowing into the post-processing apparatus 200. Thereby, when large granular dust flows into the post-processing apparatus 200, it is possible to suppress the occurrence of a problem that the removal becomes difficult. The sewage discharged from the communication unit 300 flows into the post-treatment device 200 through the communication pipe 148.

  A typical aftertreatment device 200 includes installing water shielding sheets 210 on the floor and sides of the dredging so that the sewage does not penetrate underground after excavating the ground to form dredging of a certain area. Can be formed. The air-permeable soil 272 is laid down to a certain height as a whole in the space formed by the water-impervious sheet 210, and after the flow path (buried path) 220 connected to the communication pipe 148 is installed, the air is again ventilated as a whole. Soil 272 is laid. A tree 240 is planted on the top of the breathable soil 272. One or more of the buried paths 220 installed as described above make it easy for sewage to spread throughout the aftertreatment device 200 through the air-permeable soil 272, so that the sewage is quickly purified.

  The detection unit 400 is provided at the end of the post-processing apparatus 200, and a communication pipe 149 is provided. The detection unit 400 collects water that has not been evaporated in the purified water processed by the post-processing apparatus 200. Therefore, the water quality test can be performed with the water collected in the detection unit 400. In addition, the water that has passed the water quality test can be reused. When moisture is insufficient in the air-permeable soil 272 of the post-processing device 200, the water accumulated in the detection unit 400 is soaked into the air-permeable soil 272 of the post-processing device 200 as necessary to prevent a drying phenomenon. it can. The overall length of the post-processing apparatus 200 is preferably extended by about 1 m from the point where the flow path (buried path) 220 ends.

  The post-processing apparatus 200 is constructed by a method including a step of excavating the ground to dig up a certain area of soil, and installing the water shielding sheet 210 on the dug floor and side surfaces. Breathable soil 272 is laid in the space formed by the water-impervious sheet 210, and the flow path 220 is formed. A tree 240 or a leafy plant is planted on the top of the breathable soil 272 in order to promote evaporation of moisture. A zigzag plate is installed on the outer side of the water-impervious sheet 210 so as to partially overlap.

  In FIG. 2, the schematic structure of the post-processing apparatus (soil processing apparatus) 200 is shown with sectional drawing. The water-impervious sheet 210 is provided on the boundary surface around the post-processing apparatus 200 where the breathable soil 272 and the external soil 620 are in contact. A zigzag plate 252 is provided above the water-impervious sheet 210 while being in contact with the water-impervious sheet 210 so as to partially overlap the water-impervious sheet 210. In order to prevent rainwater from accumulating, in the post-treatment device 200, the breathable soil 272 is stacked so as to be about 20 to 30 cm higher than the external soil 620. The zigzag plate 252 is provided above the boundary surface where the post-treatment device 200 and the external soil 620 are in contact with each other so that the air-permeable soil 272 does not move toward the external soil 620 so as to be higher than the height of the post-treatment device 200. It is done.

  It is desirable to provide the water shielding sheet 210 and the zigzag plate 252 in communication. The zigzag plate 252 can support the breathable soil 272 of the post-treatment device 200 at a position higher than the external soil 620, which is difficult to support only with the water shielding sheet 210. Furthermore, a small animal or the like in the external soil 620 can move to the breathable soil 272 of the post-processing device 200 through the zigzag plate 252.

  It is effective to form the breathable soil 272 of the post-processing apparatus 200 with a clinker. When it rains, the surface of the breathable soil 272 made of clinker becomes hard, and the rainwater does not enter the inside of the aftertreatment device 200 and is discharged to the external soil 620 through the zigzag plate 252. Therefore, it is possible to prevent rain from soaking into the interior of the post-processing apparatus 200 and increasing the amount of water inside the post-processing apparatus 200 to elongate the evaporation time.

  FIG. 3 shows an enlarged view of the periphery of the buried path 220 shown in FIG. The number of buried paths 220 may be one, or three or more. The buried path 220 includes the hollow box 10. The box 10 includes resin panels 11 to 13 each having a plurality of openings 15 formed by a plurality of ribs, that is, an upper wall (upper wall) 11, a lower wall (bottom wall) 12, and left and right side walls. 13 and so on. The buried path 220 further includes a space formed by the upper, lower, left and right walls 11 to 13, that is, the fibrous watering member 5 filled in the box 10, and the upper and lower walls 11 to 13, that is, the box 10. The water permeable sheets 31 and 32 that cover the outside of the water permeable sheet 39, and the water permeable sheet 39 that covers the lower side of the buried passage 220, that is, the lower side of the box 10, outside the water permeable sheet 32 on the lower side. A part 33 of the lower water-permeable sheet 32 extends like a wing from the buried path 220 in the soil 272 on both sides.

  As shown in FIG. 1, sewage that has been anaerobically treated by the pretreatment device 100 is supplied to the buried path 220 via the communication pipe 148. The sewage spreads through the gap between the fibrous sprinkling members 5 inside the buried channel 220 and spreads throughout the buried channel 220, and is supplied along the buried channel 220 to the rear of the post-treatment device 200. An example of the fibrous water sprinkling member 5 is a 500 to 3000 denier polyester bristle fiber, a tetron filament, or the like, as long as it is suitable as a filter medium and / or a microorganism propagation substrate. The primary treated water (sewage) flowing from the pretreatment device 100 flows from the water sprinkling member (sprinkling material) 5 into the soil 272 by siphon phenomenon and capillary action. At this time, a meniscus is formed between the soil particles of the soil 272 and between the fibers of the water sprinkling member 5, and the treated water (sewage) flows while taking in air as long as a negative pressure can be maintained. Therefore, biological oxidation is efficiently performed in the soil 272 by the soil pore water and the soil microorganisms.

  Further, in the water sprinkling member 5, biological oxidation is efficiently performed by the interstices of the fibers and the microorganisms that have adhered to and propagated on the fibers of the sprinkling member 5. For this reason, it is desirable that the water sprinkling member 5 and the soil 272 are in contact with each other through the water permeable sheets 31 and 32 so that air and treated water are circulated well. It is desirable to promote the growth of microorganisms in the water sprinkling member 5. If necessary, it is also possible to mix shells or use shells as the watering member 5.

The water permeable sheets (water permeable sheets) 31 and 32 include a material capable of absorbing moisture. As the water permeable sheets 31 and 32, a synthetic fiber nonwoven fabric is preferable from the viewpoint of durability, and in particular, a polyester nonwoven fabric having a thickness of about 1 to 10 mm is suitably used. A polyester nonwoven fabric having a thickness of 3 to 10 mm and a basis weight of 200 to 500 g / cm ³ is more preferable. The lower water-permeable sheet 32 includes a wing portion 33 extending in the outer direction of the embedded path 220 along the longitudinal direction of the embedded path 220. Through the wing portion 33 of the water permeable sheet 32, the sewage flowing into the buried path 220 is supplied to the breathable soil 272 surrounding the buried path 220 by a capillary phenomenon.

  As shown in FIG. 4, the buried path 22 may include a water-permeable pipe 9 arranged so as to penetrate the water sprinkling member 5 in the direction in which the buried path 220 extends. The sewage that has been anaerobically treated by the pretreatment device 100 is distributed from the communication pipe 148 to the entire buried path 220 through the pipe 9.

  FIG. 5 shows configurations of various panels constituting the box 10. FIG. 5A shows a flat panel 11 p that constitutes the upper wall 11 and the lower wall 12. FIG. 5B shows a side panel 13p constituting the side wall 13. FIG. 5C shows a panel constituting the partition 16 inside the box 10. FIG. 5D shows panels of an upper wall 11 ′ and a lower wall 12 ′ for constituting the half-size box 10. These panels have a thickness of 1 to 5 cm, for example 3 cm, and have the same configuration on the front and back.

  FIG. 6 shows the box 10 assembled by these panels 11p and 13p. FIG. 6A is a plan view of the box 10 and the bottom view appears the same. FIG. 6B is a right side view of the box 10, and the left side view appears symmetrically. FIG.6 (c) is a front view of the box 10, and a rear view appears the same.

The flat panel 11p shown in FIG. 5A is a panel made of plastic, for example, polypropylene, having a length of 1 m and a width of 40 cm as a whole, and includes a frame 18 constituting the periphery and a plurality of frames in the frame 18. And a plurality of ribs 14 arranged orthogonally and obliquely to the frame 18 so as to form a triangular opening 15. The flat panel 11p includes a total of 160 triangular openings 15. If the average opening ratio is 80%, the average opening area of each opening 15 is about 20 cm ² .

The side panel 13p shown in FIG. 5B is a plastic panel having a length of 1 m and a height of 160 cm. Like the flat panel 11p, the side panel 13p includes a frame 18 that forms the periphery, and a plurality of frames within the frame 18. And a plurality of ribs 14 arranged orthogonally and obliquely to the frame 18 so as to form triangular and rhombus openings 15. When the rhombus openings are replaced with two triangular openings, the side panel 13p substantially includes a total of 80 triangular openings 15 and the average opening area is 80%. Is about 16 cm ² .

The partition 16 shown in FIG. 5 (c) is a plastic panel having a width of 360 cm and a height of 160 cm. Like the flat panel 11p, the partition 16 has a frame 18 that forms the periphery, and a plurality of triangular shapes inside the frame 18. And a plurality of ribs 14 arranged so as to be orthogonal and oblique to the frame 18 so as to form the opening 15. A circular frame 19 for passing a pipe is further provided on the upper center side of the partition 16. When the circular frame 19 is replaced with a triangular opening, the partition 16 substantially includes a total of 24 triangular openings 15, and if the average opening ratio is 80%, the average opening area of each opening 15 is about 19 cm. ² .

The half-sized flat panel 11p ′ shown in FIG. 5 (d) is a plastic panel having a length of 50 cm and a width of 40 cm as a whole, and includes a frame 18 constituting the periphery and a plurality of frames in the frame 18. And a plurality of ribs 14 arranged orthogonally and obliquely to the frame 18 so as to form a triangular opening 15. The flat panel 11p ′ includes a total of 80 triangular openings 15. If the average opening ratio is 80%, the average opening area of each opening 15 is about 20 cm ² .

  These panels 11p, 13p, 16 and 11p ′ include a protrusion 17a and a recess 17b into which the protrusion 17a is fitted, and the box 10 having a rectangular cross section can be assembled at the construction site of the embedded path 220.

  FIG. 7 shows a state in which the box 10 is assembled using these panels 11p, 13p, and 16, and the buried path 220 is constructed. First, a water-impervious sheet 39 made of rubber, vinyl, polypropylene or the like is installed on the breathable soil 272, and the water-permeable sheet 32 including the wing portion 33 is installed thereon. The lower wall 12 and the side panel 13p of the box 10 are configured on the water-permeable sheet 32 by combining the flat panel 11p and the side panel 13p, and the partition 16 is disposed as necessary to increase the strength of the box 10. The inside of the box 10 is filled with a sprinkling member 5 made of fiber, and the upper part of the box 10 is covered with a flat panel 11p. Thereby, the box 10 in which the upper and lower walls 11, 12 and 13 have the openings 15 is assembled, and the watering member 5 is filled therein. Furthermore, the upper part of the box 10 is covered with the water-permeable sheet 31. As a result, the buried path 220 is assembled, and the buried path 220 is backfilled by the breathable soil 272.

  FIG. 8 shows a cross section in the longitudinal direction of the buried path 220 in the backfilled state, excluding the watering member 5. The top, bottom, left and right of the box 10 are covered with water permeable sheets 31 and 32, and the water permeable sheets 31 and 32 and the water spray member 5 are in contact with each other through the openings 15 formed by the ribs 14 of the box 10.

FIG. 9 schematically shows how the water-permeable sheet 31 or 32 and the water spray member 5 come into contact with each other in the opening 15. In box 10, a plurality of ribs 14 are arranged at appropriate clearance, in each of the vertical and horizontal walls 11 to 13, a plurality of openings 15 having an opening area of several cm ² ~ number 10 cm ² is configured Is done. Since these openings 15 have a relatively large opening area, even the water-permeable sheets 31 and 32 having a relatively large thickness, for example, a thickness of about several millimeters, are bent or distorted inside the opening 15. Therefore, for example, as schematically shown in the openings 15a, 15c, and 15d, the water permeable sheets 31 or 32 are appropriately bent in the respective openings 15a, 15c, and 15d, and efficiently with the water spraying member 5 inside the box 10. Contact. Further, as shown in the opening 15b, for example, the water sprinkling member 5 inside the box 10 protrudes outward from the opening 15b and efficiently contacts the outer water-permeable sheet 32.

  On the other hand, the plates 11p and 13p constituting the box 10 are provided with a plurality of ribs 14 so as to be orthogonal to and oblique to the frame 18 in addition to the frame 18, and a plurality of triangles are formed by the ribs 14. Is done. Therefore, the box 10 assembled by the plates 11p and 13p has sufficient strength against pressure and stress from various directions and is strong against earth pressure. For this reason, the buried path 220 using the box 10 is greatly deformed even if the pressure applied to the buried path 220 increases due to various factors such as a slight difference in soil thickness and uneven settlement. There are few things.

  Therefore, in the buried path 220 using the box 10, the box 10 can ensure strength against earth pressure. For this reason, there is little possibility that pressure will be applied to the watering member 5 inside the box 10 to reduce the gap, the watering member 5 will be clogged by crushing, or the watering member 5 will lose water permeability.

  In addition, in the buried path 220, the water spray member 5 inside the box 10 and the water permeable sheets 31 and 32 outside the box 10 are efficiently and directly connected through the opening 15 having a sufficiently large opening area of the box 10. Can be contacted. For this reason, the sewage flowing into the buried path 220 is dispersed in the direction of the water permeable sheets 31 and 32 by the water sprinkling member 5, and efficiently wets the breathable soil 272 through the water permeable sheets 31 and 32. At that time, sewage and air can be efficiently exchanged by sandwiching the water permeable sheets 31 and 32 between the breathable soil 272 outside the water permeable sheets 31 and 32 and the water spray member 5 inside the box 10. Microorganisms useful for wastewater treatment, such as bacteria, can be propagated on the member 5. For this reason, the purification performance of the sewage in the buried path 220 can be improved.

  Moreover, since the strength of the buried path 220 can be ensured by the box 10, sewage can be circulated through the entire buried path 220 by the water sprinkling member 5 filled in the box 10. For this reason, a water-permeable pipe can be omitted, and the buried path 220 can be constructed in a short time at a low cost.

  Furthermore, since the water sprinkling member 5 is deformed along the opening 15 having a large opening area, the water sprinkling member 5 is difficult to move with respect to the box 10. For this reason, even if sewage flows through the buried path 220 for a long period of time, the arrangement of the water sprinkling members 5 is less likely to be biased. In addition, when the water sprinkling member 5 is backwashed to prevent clogging, the water sprinkling member 5 is less likely to move due to backwashing and can be washed with peace of mind. Therefore, the processing performance of the buried path 220 can be maintained well over a long period of time.

In order to ensure the strength of the box 10 and further ensure the contact between the water spray member 5 and the water permeable sheet 31 or 32, the opening area of the opening 15 is preferably 5 to 100 cm ² . Further, it is desirable opening area of the opening 15 is 10 to 50 cm ^2, the opening area of the opening 15 is further preferably a 10 to 40 cm ^2. More preferably, the opening area of the opening 15 is 15 to 30 cm ² .

  As described above, the sewage treatment apparatus 1 includes the pre-treatment apparatus 100 and the post-treatment apparatus 200. The sewage can be purified more cleanly and the purified sewage can be evaporated. Therefore, it becomes possible to omit the discharge destination of sewage. And since the aeration soil is installed in the post-processing apparatus 200 in the state which is not sealed, the aerobic microbe in it propagates, absorbing oxygen in air | atmosphere, and has an effect which continues eating and decomposing | disassembling filth . Therefore, the sewage treatment apparatus 1 does not require an aeration system, does not need to use chlorine, and further, gas generated inside the septic tank is not easily released directly to the ground, and it is possible to dispense with a discharge facility. Sewage treatment equipment.

1 Wastewater treatment equipment 100 Pretreatment equipment, 200 Posttreatment equipment (soil treatment equipment)

Claims (6)

A treatment apparatus having a buried path for dispersing pretreated sewage embedded in soil,
The buried path is a plurality of triangular openings formed by a plurality of ribs combined so as to form a triangle, and the resin upper, lower, left and right walls including an opening having an opening area of 5 to 100 cm ² ;
A fibrous sprinkling member filled in the space formed by the upper, lower, left and right walls;
A water-permeable sheet that covers the upper, lower, left and right walls, and a part of the water-permeable sheet extends from the buried path into the soil; and
The processing apparatus which has the water-impervious sheet which covers the lower side of the said embedding path on the outer side of the said water-permeable sheet which covers the said upper, lower, left and right walls. The processing apparatus according to claim 1, wherein the upper, lower, left, and right walls include the opening having an opening area of 10 to 50 cm ² .   3. The processing apparatus according to claim 1, wherein the buried path further includes a water permeable pipe disposed so as to penetrate the water sprinkling member in a direction in which the buried path extends. A processing apparatus according to any one of claims 1 to 3,
A sewage treatment apparatus, comprising: a pretreatment device for anaerobically treating sewage supplied to the treatment device. A resin panel that forms the top, bottom, left, and right walls of a buried path that disperses pretreated sewage in the soil, and has a plurality of triangular openings formed by a plurality of ribs combined to form a triangle. And the panel whose opening area of the said opening is 5-100 cm < ² >. The panel according to claim 5, wherein an opening area of the opening is 10 to 50 cm ² .

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