JPWO2010116748A1 - Sewage treatment equipment - Google Patents

Abstract

A pretreatment unit (100) including a plurality of areas, on which porous plate members (152, 134) are installed, and the porous plate member is covered with breathable soil (172) (100) and a flow path (220) to which sewage treated by the pretreatment unit (100) is supplied, and is formed by a lattice-shaped or porous concrete frame, and is surrounded by a breathable soil (272). Provided is a sewage treatment apparatus (1) having a post-treatment unit (200) including a covered flow path (220).

Description

  The present invention relates to a sewage treatment apparatus.

  As a device for purifying sewage such as a conventional toilet, there is a septic tank that is formed below the toilet. Generally, bacteria are put into the septic tank to decompose sewage, and it is necessary to provide oxygen in order to reproduce aerobic bacteria such as the bacteria mentioned above. Requires an aeration system that is Therefore, the conventional sewage treatment apparatus has a disadvantage that energy is wasted because electricity is used to maintain the aeration system.

  Further, purchase costs are required to use chlorine and the like regularly, and when the aerobic bacteria die and the scum is generated, the worker must periodically pull out the accumulated scum. The expense for that is also needed.

  In addition, since the gas generated inside the septic tank is directly discharged to the ground through a pipe installed in the septic tank, there is a problem that bad odor is generated around the septic tank. On the other hand, since the conventional sewage treatment apparatus has a structure for discharging purified treated water, it may not be installed in a place where there is no discharge destination or where inflow into the underground is not permitted.

  As described above, there is a demand for a sewage treatment apparatus in which gas generated inside the septic tank is less likely to be directly released to the ground.

  One aspect of the present invention is a pretreatment unit including a plurality of areas, a pretreatment unit in which a porous plate member is installed, and the porous plate member is covered with breathable soil, and a pretreatment unit A sewage treatment apparatus having a flow path to which sewage treated in a section is supplied, and a post-treatment section including a flow path formed by a lattice or porous concrete frame and surrounded by breathable soil It is. The odor from the sewage treatment apparatus is discharged to the ground via a wide range of breathable soil. For this reason, malodors such as methane gas are easily absorbed by the breathable soil, and the malodor can be reduced. The breathable soil preferably contains clinker, shells or charcoal.

  The plurality of areas of the pretreatment unit include a first area connected to the sewage inflow pipe, a second area connected to the first area by the first communication pipe, and a second area connected by the second communication pipe. A zigzag plate including a third area connected to the area, the third area filled with a plurality of gravels, and a plurality of holes penetrating the front and rear and the left and right on the third area. It is desirable that it is installed.

  It is desirable that a plate material made of porous concrete is installed on the first area and the second area. It is desirable that a water-permeable mat is installed on the first area and the second area.

  It is desirable that the lower end of the sewage inflow pipe in the first area is at a high position with respect to the inlet of the first communication pipe. The second communication pipe desirably includes a concrete structure extending to the floor of the third area in the third area. Furthermore, it is desirable that the concrete structure is formed with a plurality of through holes through which the sewage flows out in the third area over the entire side surface.

  As for a post-processing part, it is desirable to include the water-permeable sheet arrange | positioned around a frame, and the water-impervious sheet arrange | positioned under the water-permeable sheet. As for a post-processing part, it is desirable to include the part which the water-permeable sheet extended like the wing | blade in the outer side direction of the frame.

  Moreover, it is desirable that the post-processing unit includes a fiber member disposed inside the frame. As for a post-processing part, it is desirable to include the part by which the air permeable soil was filled in the space where the water-impervious sheet was installed in the floor surface and side surface after digging soil. It is desirable that the post-processing unit includes a zigzag plate arranged on the outside of the water-impervious sheet so as to partially overlap the water-impervious sheet.

  Furthermore, it is desirable that the sewage treatment apparatus has a communication part disposed between the pre-treatment part and the post-treatment part, and the communication part includes a filter installed inside. The filter preferably includes a porous stainless steel plate and a filter medium made of sponge or non-woven fabric attached to the stainless steel plate.

  Another aspect of the present invention is a sewage treatment apparatus having a post-treatment unit including a flow path for dispersing sewage treated by the pretreatment unit. The flow path includes a lattice-shaped or porous concrete frame and a fiber member arranged inside the frame. The post-processing unit further includes a water permeable sheet disposed around the frame, a water shielding sheet disposed below the water permeable sheet, and breathable soil covering the water permeable sheet and the water shielding sheet. The post-processing section preferably further includes a portion in which the water-permeable sheet extends like a wing in the outer direction of the frame.

It is a top view of a sewage treatment apparatus. It is sectional drawing of a sewage treatment apparatus. FIG. 3 is a plan view (FIG. 3A) and a sectional view (FIG. 3B) of a zigzag plate. It is sectional drawing (FIG. 4 (a)) which shows a connection part, and the figure (FIG.4 (b)) which extracted the filter. It is an expansion | deployment perspective view of a filter. It is sectional drawing (FIG. 6 (a)) which shows the structure of a flow path, and a figure (FIG.6 (b)) which lacks and shows a part. It is sectional drawing which shows the operating state of a post-processing part. It is sectional drawing (FIG. 8 (a)) which shows the other different structure of a flow path, and a figure (FIG. 8 (b)) which lacks and shows a part. It is sectional drawing of the AA part of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view of a sewage treatment apparatus according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the purification apparatus shown in FIG.

  The sewage treatment apparatus (sewage purification apparatus) 1 includes a pretreatment unit 100 that primarily treats sewage, and a post-treatment unit 200 that receives sewage treated by the pretreatment unit 100 and performs secondary treatment thereof. The communication part 300 between the pre-processing part 100 and the post-processing part 200, and the detection part 400 which inspects the state of the sewage processed through the post-processing part 200 are included. The preprocessor 100 includes three separate areas 110, 120 and 130. Each area 110, 120 and 130 is separated by a wall, and the lower and side surfaces of each area 110, 120 and 130 are all closed.

  A sewage inflow pipe 140 into which sewage that has not yet been purified flows is communicated (communication) with the first area 110. Between the 1st area 110 and the 2nd area 120, the 1st communicating pipe 142 which connects them (communication) is provided. Between the 2nd area 120 and the 3rd area 130, the 2nd communication pipe | tube 144 which connects (communication) them is provided. Between the 3rd area 130 and the connection part 300, the 3rd communication pipe 146 which connects (communication) them is provided.

  The sewage first flows into the first area 110 through the sewage inflow pipe 140. The sewage that has flowed into the first zone 110 is separated in the first zone 110, and the first purification progressing water 112 and a first scum called a scum floating on the first purification progressing water 112 are obtained. It includes three large parts: suspended matter 114 and first sedimentation sludge 116 that settles on the floor. The first zone 110 to the third zone 130 are provided so that anaerobic bacteria such as methane bacteria reproduce inside. Anaerobic bacteria are used to purify the contaminated first purification proceeding water 112.

  The first purification progressing water 112 partially purified in the first area 110 flows into the second area 120. In the second zone 120, the first purification progressing water 112 that has flowed in settles on the second purification progressing water 122, the second floating substance 124 that floats on the second purification progressing water 122, and the floor. Separated into second sedimented sludge 126. In the second zone 120, the second purified water 122 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, the purification of the second purification progressing water 122 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 second purification progressing water 122 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.

  Of the second communication pipe 144 that guides water to the third section 130 and the third communication pipe 146 that discharges water from the third section 130, the portion located inside the third section 130 is the third section 130. And is formed of a concrete structure that extends (extends) to the floor of area 130. By using the concrete, it is possible to prevent the communication pipes 144 and 146 from being deformed by the gravel 132 even if the communication pipes 144 and 146 come into contact with the gravel 132. In addition, the communication pipes 144 and 146 have a concrete side wall structure extending to the floor, and the inflow arrow 131 and the outflow arrow 133 are partially disposed so that sewage can flow in and out over the entire side wall. It is desirable to form a hole penetrating the side wall. By flowing in and out the sewage through the holes 131 and 133, the contact efficiency between the adjacent gravel 132 and the sewage can be improved.

  FIG. 3 is an enlarged view of the configuration of the zigzag plate 134 provided in the third section 130 with a plan view (FIG. 3A) and a cross-sectional view (FIG. 3B). The zigzag plate 134 has a zigzag cross section, and is installed on the top of the gravel 132 in the third area 130. 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. 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. The upper part of the zigzag board 134 is covered with breathable soil 172. Due to the shape of the zigzag plate 134, the air-permeable soil does not fall down from above, and air, moisture, small small animals and the like can be refracted and moved as indicated by the arrow 136.

  A slab plate 152 is installed on the first area 110 and the second area 120. As the slab plate, a plate made of general concrete having a large number of holes 154 having a diameter of about 10 cm is used. When using the slab board | plate 152 containing many holes, it is desirable to install the cloth-like water-permeable mat 162 on the slab board | plate 152 so that breathable soil may not fall. It is also possible to change the slab plate 152 made of porous concrete. Porous concrete is made of the slab plate 152 that is not general concrete but is made of as little aggregate as possible without using sand in the aggregate. Since the holes provided in the slab plate 152 made of porous concrete are small, even if the slab plate 152 is covered with the breathable soil, the above-described breathable soil passes through the slab plate 152 and enters the first area 110. It will not fall into some sewage. Therefore, it is not necessary to install a water permeable mat.

  Breathable soil 172 with high breathability is placed on the permeable mat 162 or the slab board 152 made of porous concrete. This breathable soil 172 has a high porosity, facilitates the growth of bacteria, and easily evaporates moisture. 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 air-permeable soil used in the post-processing unit 200.

  The slab plate of the conventional septic tank is almost sealed with only one vent hole for discharging gas. Furthermore, since the top of the slab plate is covered with non-breathable earth and sand that can be easily obtained at the site, or covered with concrete, malodor is discharged from the vent hole.

  In the pretreatment unit 100, all of the first area 110 to the third area 130 have a structure in which the upper part can be ventilated, and the breathable soil 172 is further disposed thereon. Therefore, the gas generated from the internal sewage of the pretreatment unit 100 is exhausted through the holes 154 opened in the entire range of the slab plate 152 and the zigzag plate 134, and is passed over the ground via the wide range of breathable soil 172. To be discharged. For this reason, bad odors such as methane gas are easily absorbed by the breathable soil 172, and there is an effect that almost no bad odors are generated.

  Further, a combination of the above-described breathable soil 172 and the slab board 152 or zigzag board 134 in which the holes 153 are formed allows a small animal such as an earthworm to easily enter the first area 110 to the third area 130. effective.

  Further, one or more lids 180 are installed in the first area 110 and the second area 120 of the preprocessing unit 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.

  All the pipes used in the present invention such as the sewage inflow pipe 140, the first communication pipe 142, the second communication pipe 144, and the third communication pipe 146 may be pipes, but stainless steel plates are used. It is also possible to use it by bending it into the shape of a tube.

  The inflow □ in the first area 110 of the first communication pipe 142 is provided below the position where the suspended matter in the first area 110 is floating, and the outflow □ in the second area 120 is also the first. 2 is provided below the position where the suspended matter in the area 120 is floating. The second communication pipe 144 has the same configuration, and the third communication pipe 146 is provided as far as possible below the water surface where the inflow □ located in the third section 130 is being purified. Therefore, these communication pipes 142, 144, and 146 make it difficult for floating substances having a low specific gravity to move to the next area.

  In order to further suppress the floating material from moving to the next area, the lower end of the sewage inflow pipe 140 in the first area 110 is provided at a position higher than the inflow □ of the first communication pipe 142 by a distance a. . Accordingly, the suspended matter of the sewage flowing in through the sewage inflow pipe 140 floats on the water surface before flowing into the first communication pipe 142, and hardly flows out through the first communication pipe 142. Also in the second section 120, the outflow □ of the first communication pipe 142 is provided at a position higher than the inflow □ of the second communication pipe 144 by a distance b.

  4 is an enlarged view of the connecting portion 300 of FIG. 2, FIG. 4 (a) is a cross-sectional view, and FIG. 4 (b) shows the filter 320 extracted. FIG. 5 is an exploded perspective view of the filter 320 shown in FIG. The sewage that can be purified by anaerobic bacteria and small animals in the pretreatment unit 100 flows into the communication unit 300 through the third 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 322 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 connecting portion 300.

  As shown in FIG. 5, an example of the filter 320 includes a V-shaped stainless steel plate 323 having a perforated 321, a filter net 325 made of sponge or non-woven fabric inserted into the V-shaped stainless steel plate 323, a mounting member 327, and the like. Is included. The filter mesh 325 made of sponge or non-woven fabric is effective for removing components such as oil and other chemical components that are difficult to remove with the V-shaped stainless steel plate 323 alone.

  The communication unit 300 includes a function of removing large granular dust or the like before flowing into the post-processing unit 200. When large granular dust flows into the post-processing unit 200, it is possible to suppress the occurrence of a problem that the removal becomes difficult. The sewage discharged from the connecting part 300 flows into the post-processing part 200 through the fourth communication pipe 148.

  The exemplary post-processing unit 200 includes excavating the ground to form a certain area of dredging, and then installing a water shielding sheet 210 on the floor and sides of the dredging so that sewage does not penetrate underground. Can be formed. After 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 the flow paths 220 and 230 connected to the fourth communication pipe 148 are installed, the whole is again again. Breathable soil 272 is laid. A tree 240 is planted on the top of the breathable soil 272. One or more of the above-described flow paths 220 and 230 are arranged such that when sewage flows directly into the permeable soil 272 of the post-treatment unit 200 through the fourth communication pipe 148, the sewage is post-treated through the permeable soil 272. Since it is difficult to spread all over the part 200, it plays the role which complements these. That is, the flow paths 220 and 230 serve to allow the sewage flowing through the fourth communication pipe 148 to quickly move through the flow paths 220 and 230 to the entire post-processing unit 200 and be quickly purified. .

  The diameter of the flow paths 220 and 230 is desirably about several times the diameter of the fourth communication pipe 148. Since the air-permeable soil 272 also has a small space where air exists, microorganisms propagate. In addition, by securing a large space in the flow paths 220 and 230, it is possible to provide an environment in which many kinds of microorganisms and small animals can easily propagate. Although the overall length of the post-processing unit 200 also varies depending on the length of the flow paths 220 and 230, it is desirable that the overall length of the post-processing section 200 is extended by about 1 m from the point where the flow paths 220 and 230 end.

  FIG. 6A is a cross-sectional view showing one form of the flow path 220 used in the present invention. FIG. 6B is a diagram showing the configuration of the flow path 220 with a part thereof omitted. The flow path 220 is made of a resin material and has a lattice pattern on the surface, and has a rectangular cross section having a rectangular cross section 222, a lattice type lid 224 placed on the top of the lattice form 222, and the inside of the lattice form 222 And a fiber member 226 placed below the grid-type lid 224. A water-permeable sheet 227 is provided around the lattice-type frame 222 so as to surround the lattice-type frame 222. Further, a water shielding sheet 228 is installed below the water permeable sheet 227.

  As shown in FIG. 6, the fourth communication pipe 148 communicates (communicates) with the lattice-type frame 222, and sewage is supplied into the lattice-type frame 222. The sewage spreads over the entire flow path while colliding with the fiber member 226, and is supplied to the rear of the post-processing unit 200 along the flow path 220. The fiber member 226 used as a filter medium includes a fiber-type member in which microorganisms easily propagate. When sewage collides with the fiber member 226 to generate turbulence, the fiber member 226 plays a role of aeration. Help breeding. If necessary, a shell can be used as the filter medium.

  The water permeable sheet 227 includes a material capable of absorbing moisture. The water permeable sheet 227 is provided so as to form the wing portion 229 in the outer direction of the lattice frame 222 along the flow direction of the lattice frame 222. Through the wing portions 229 of the water-permeable sheet 227, the sewage flowing into the lattice-type frame 222 is supplied to the breathable soil 272 surrounding the lattice-type frame 222 by a capillary phenomenon.

  FIG. 7 is a diagram showing an operation of the post-processing unit 200 by a partial cross-sectional view of the post-processing unit 200. As shown in FIG. 7, the sewage that has flowed into the flow path 220 of the post-processing unit 200 through the fourth communication pipe 148 travels in the direction of a large path arrow 550. Further, when the sewage hits the fiber member 226, it spreads in the direction of a plurality of small diagonal arrows 552. Further, when the sewage hits the lattice-shaped frame 222, it spreads in the direction of a plurality of small traveling arrows 554.

  In this way, the sewage spreads in various directions while moving inside the flow path 220 and is purified by purification microorganisms and small animals inside the flow path 220. Further, the sewage is discharged to the outside of the flow path 220 through the water permeable sheet 227 and is absorbed by the breathable soil 272 to be naturally purified. Thereafter, the soil 272 is evaporated in the direction of the rising arrow 560.

  FIG. 8A shows a cross-sectional view of one of the different forms of the flow path 230. FIG. 8B is a diagram showing the configuration of the flow path 230 with a part thereof omitted. The flow channel 230 of the second form is not made of general concrete as a flow channel frame, but is made of porous concrete made of sand that is not used as an aggregate, or contains as little sand as possible. A porous concrete frame 232 is used. The porous concrete frame 232 in this example includes a main body 234 having a U-shaped cross section and a lid 236 that covers the main body 234. A filter medium such as a fiber member 233 is disposed inside a porous concrete frame 232. The lid 236 is effective for putting a filtering material such as the fiber member 233 inside the porous concrete frame 232. The lid 236 is mainly used for construction and may be sealed after construction.

  A water-permeable sheet 237 is provided around the entire porous concrete frame 232. The water permeable sheet 237 is constructed so as to form a wing portion 239 extending in the outer peripheral direction of the porous concrete frame 232. Sewage discharged to the outside of the porous concrete frame 232 is supplied to the breathable soil 272 through the wing portion 239. A water-impervious sheet 238 is provided below the water-permeable sheet 237 to block the permeation of sewage below the soil.

  9 is a cross-sectional view taken along the line AA in FIG. The water-impervious sheet 210 is provided around the post-processing unit 200 and on the boundary surface where the breathable soil 272 and the external soil 620 of the post-processing unit 200 are in contact with each other. 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-processing unit 200, the breathable soil 272 is stacked so as to be about 20 to 30 cm higher than the external soil 620. The zigzag board 252 is arranged so as to be higher than the height of the post-processing unit 200 along the boundary surface where the post-processing unit 200 and the external soil 620 are in contact so that the breathable soil 272 does not move toward the external upper soil 620. Provided.

  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-processing unit 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 unit 200 through the zigzag board 252.

  It is effective to form the breathable soil 272 of the post-processing unit 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 post-treatment unit 200 and is discharged to the external soil 620 through the zigzag plate 252. Accordingly, it is possible to prevent rain from soaking into the interior of the post-processing unit 200 and increasing the amount of water inside the post-processing unit 200 to elongate the evaporation time.

  As shown in FIG. 2, a fifth communication pipe 149 that communicates the post-processing unit 200 and the detection unit 400 is provided at the end of the post-processing unit 200. The detection unit 400 collects water that has not been evaporated in the purified water processed by the post-processing unit 200. The water quality can be inspected 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 unit 200, the water accumulated in the detection unit 400 is soaked into the air-permeable soil 272 of the post-processing unit 200 as necessary to prevent a drying phenomenon. it can.

  As described above, the sewage treatment apparatus 1 includes the pre-processing unit 100 and the post-processing unit 200, and can further purify the sewage more beautifully and evaporate the purified sewage. Therefore, it becomes possible to omit the discharge destination of sewage. And since the aeration soil is installed in the post-processing part 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 . In addition, small animals such as earthworms can also enter the pretreatment unit 100 and the posttreatment unit 200, and the effect of purifying sewage by eating filth in the pretreatment unit 100 and / or the posttreatment unit 200. Can also be obtained.

  It is also possible to grow plants on the breathable soils 172 and / or 272 to further promote the evaporation of moisture at the roots of the plants and increase the treatment capacity. A member having a zigzag cross section can be inserted between the porous slab plate 152 and the air-permeable soil 172 to more reliably prevent the air-permeable soil 172 from falling.

  As described above, the sewage treatment apparatus 1 is made of the pretreatment unit 100 formed in a plurality of areas, the flow paths 220 and 230 into which the sewage treated by the pretreatment unit 100 flows, and the breathable soil. And a processing unit 200. The pre-processing unit 100 is divided into at least three areas, and includes a first area 110, a second area 120, and a third area 130. A communication unit 300 is provided between the pre-processing unit 100 and the post-processing unit 200, and a detection unit 400 is further connected to the post-processing unit 200.

  Anaerobic bacteria such as methane bacteria are generated in the three areas of the pretreatment unit 100. A sewage inflow pipe 140 is connected to the first area 110, a first communication pipe 142 is provided between the first area 110 and the second area 120, and the second area 120 and the third area 110 are connected to each other. A second communication pipe 144 is provided between the first and second areas 130. The third area 130 is filled with gravel 132 or the like with anaerobic bacteria such as methane bacteria attached to the surface, and a zigzag board 134 is installed on the gravel 132 of the third area 130. The upper part of the zigzag board 134 is covered with breathable soil 172.

  A porous slab plate 152 is installed on the first area 110 and the second area 120. The porous slab plate 152 is a concrete plate or a porous concrete plate having a large number of holes. A water permeable mat 162 may be installed on the slab plate 152, and a highly breathable soil 172 is provided on the water permeable mat 162. As a material for the breathable soil 172, clinker, shells or charcoal can be used.

  Inside the first zone 110, the sewage inflow pipe 140 is provided such that its lower end is positioned higher than the inflow □ of the first communication pipe 142. A filter 320 is installed inside the communication unit 300.

  The flow path 220 of the first form includes a lattice-type frame 222, and a fiber member 226 is disposed inside the lattice-type frame 222. A water-permeable sheet 227 is provided around the lattice-type frame 222, and further, a water-impervious sheet 228 is provided below the water-permeable sheet 227. The water-permeable sheet 227 has wing portions 229 formed in the outer direction of the lattice-shaped frame 222.

  The second form flow path 230 includes a frame 232 made of porous concrete. A fiber member 233 is disposed inside a porous concrete frame 232, and a water-permeable sheet 237 is prepared around the porous concrete frame 232. A water shielding sheet 238 is prepared under the water permeable sheet 237, and a wing portion 239 extending in the direction of the outside of the porous concrete frame 232 is formed on the water permeable sheet 237.

  The construction method of the post-processing unit 200 includes a step of excavating the ground to excavate soil of a certain area and installing the water shielding sheet 210 on the excavated floor surface and side surfaces. Breathable soil 272 is laid in the space formed by the water-impervious sheet 210, and the flow paths 220 and 230 are formed. The top of the breathable upper soil 272 is planted with trees 240 or leafy plants to promote evaporation of moisture. A zigzag plate 252) is placed on the outside of the water-impervious sheet 210 so as to partially overlap.

  The sewage treatment apparatus 1 including the pretreatment unit 100 and the posttreatment unit 200 purifies the sewage more beautifully and evaporates the purified sewage, and therefore does not require a discharge destination of the sewage. Since the post-treatment unit 200 is used in a state where the air-permeable soil is not sealed, there is an effect that aerobic bacteria in the soil propagate while absorbing oxygen in the atmosphere, and continue to decompose by eating filth. Since small animals such as earthworms also invade the pretreatment unit 100 and the posttreatment unit 200, the effect that they eat filth and purify the sewage is also obtained. Plants can be cultivated on the breathable soils 172 and 272, and the effect of increasing the treatment capacity by further promoting the evaporation of moisture at the roots of the plants can be obtained. It is also possible to more efficiently prevent the breathable soil from falling down by inserting a member having a zigzag cross section between the porous slab plate and the breathable soil.

  As described above, 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 the discharge facility is unnecessary. It is a sewage treatment device that can.

  The above description is merely illustrative of the technical idea of the present invention, and any person having ordinary knowledge in the technical field to which the present invention belongs will not depart from the essential characteristics of the present invention. Various modifications and variations will be possible within the scope. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain them, and the scope of the technical idea of the present invention is not limited by such examples. The protection scope of the present invention should be construed according to the claims, and all technical ideas within the scope equivalent thereto are construed as being included in the scope of the present invention.

Claims (17)

A pretreatment unit including a plurality of areas, on which a porous plate is installed, and the porous plate is covered with breathable soil on the porous plate,
A flow path to which the sewage treated in the pretreatment section is supplied, the posttreatment section including a flow path formed by a lattice or porous concrete frame and surrounded by the breathable soil. Having sewage treatment equipment.   The sewage treatment apparatus according to claim 1, wherein the breathable soil includes clinker, shells, or charcoal. In claim 1,
The plurality of areas of the pretreatment unit include a first area connected to a sewage inflow pipe, a second area connected to the first area by a first communication pipe, and the second communication pipe. A third zone connected to the second zone, the third zone is filled with a plurality of gravel, and a plurality of holes penetrates the third zone while bending forward, backward, left and right. The sewage treatment equipment where the zigzag board is installed.   The sewage treatment apparatus according to claim 3, wherein a plate material made of porous concrete is installed on the first area and the second area.   The sewage treatment apparatus according to claim 3, wherein a water-permeable mat is installed on the first area and the second area.   4. The sewage treatment apparatus according to claim 3, wherein a lower end of the sewage inflow pipe in the first section is at a position higher than an inflow port of the first communication pipe.   4. The sewage treatment apparatus according to claim 3, wherein the second communication pipe includes a concrete structure extending to the floor of the third area in the third area. In claim 7,
The sewage treatment apparatus, wherein a plurality of through holes for discharging sewage to the third area are formed over the entire side surface of the concrete structure. In claim 1,
The said post-processing part is a sewage treatment apparatus containing the water-permeable sheet arrange | positioned around the said frame, and the water-impervious sheet arrange | positioned under the said water-permeable sheet. In claim 9,
The said post-processing part is a sewage treatment apparatus containing the part which the said water-permeable sheet extended like a wing | blade in the outer side direction of the said frame. In claim 1,
The said post-processing part is a sewage treatment apparatus containing the fiber member arrange | positioned inside the said frame. In claim 1,
The said post-processing part is a sewage treatment apparatus containing the part by which the said air-permeable soil was filled in the space where the water-impervious sheet was installed in the floor surface and side surface after digging soil. In claim 12,
The said post-processing part is a sewage treatment apparatus containing the zigzag board arrange | positioned upwards so that a part may overlap with the said water shielding sheet on the outer side of the said water shielding sheet. In claim 1,
Having a communication part arranged between the pre-processing part and the post-processing part,
The said connection part is a sewage treatment apparatus containing the filter installed in the inside. In claim 14,
The said filter is a sewage treatment apparatus containing a porous stainless steel plate and the filter medium which consists of a sponge or a nonwoven fabric attached to the said stainless steel plate. Having a post-processing section including a flow path for dispersing sewage treated in the pre-processing section;
The flow path includes a lattice-shaped or porous concrete frame and a fiber member disposed inside the frame,
The post-processing unit includes a water permeable sheet disposed around the frame,
A water shielding sheet disposed below the water permeable sheet;
A sewage treatment apparatus, comprising breathable soil covering the water-permeable sheet and the water-impervious sheet. In claim 16,
The said post-processing part is a sewage treatment apparatus containing the part which the said water-permeable sheet extended like a wing | blade in the outer side direction of the said frame.

Images