JPH07171582A - Purifying tank for combination treatment - Google Patents

Abstract

PURPOSE:To provide a purifying tank for combination treatment made compact as a whole, realizing standardization, capable of being reduced in manufacturing cost, capable of removing a solid in sewage without generating a malodor and capable of simultaneously receiving domestic sewage and garbage to treat them. CONSTITUTION:In a purifying tank for combination treatment having a culture tank 2, a reaction stirring tank 10, a first sedimentation tank 15, a contact tank 20 and a second sedimentation tank 22, the first sedimentation tank 15 is demarcated by a substantially parallel partition wall 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a septic tank for merger treatment. More specifically, the septic tank as a whole can be made compact, the standardization can be realized, the manufacturing cost can be reduced, and the existing septic tank can be easily modified to be manufactured. The present invention relates to a septic tank for combined treatment, which can treat not only sewage such as human waste, sewage and / or domestic effluent but also garbage, and can realize deodorization.

[0002]

2. Description of the Related Art Conventionally, Japanese Patent Application Laid-Open No. 61-260880 discloses a method for culturing a bacterial group which produces a microbial metabolite containing phenol and a compound having a phenol-exposed group. In this method, in the adjusting step, the soil bacterial group is acclimated to produce a microbial metabolite containing a phenol or a compound having a phenol-exposed group, and in the culturing step, the acclimated soil bacterial group is further activated. In addition to increasing the amount of metabolites produced by the activity of the soil bacteria group, the bacteria group other than the soil bacteria group is inactivated by the antibacterial action of the metabolites.

Further, Japanese Unexamined Patent Publication No. 61-263697 discloses a technique in which the culture technique described in Japanese Unexamined Patent Publication No. 61-260880 is applied to wastewater treatment. This technology is a physicochemical method by contacting and mixing organic matter in wastewater with a microbial metabolite containing phenol or a compound having a phenol-exposed group, or the metabolite and a substance containing a large amount of activated silicic acid. It is intended to purify the wastewater by causing it to undergo macromolecule formation including binding, particle formation, coagulation, condensation, and polymerization, and micronization of fine sludge, and subjecting this to solid-liquid separation.

The present inventor has previously proposed Japanese Patent Application No. 61-180581 (Japanese Patent Application Laid-Open No. 61-180581) as a technique for applying the wastewater treatment technique using the above-mentioned culture technique to a domestic septic tank for urine and gray water. Japanese Patent Laid-Open No. 63-158192).
We proposed a septic tank consisting of a reaction aeration tank, a separation tank, and a reaction separation tank with an outlet for treated water. In addition, Japanese Patent Application Sho 63-1
In the specification of 68531 (see Japanese Patent Application Laid-Open No. 2-17995), a domestic septic tank having a culture tank, an inflow tank, a reaction tank, a precipitation tank, and a discharge tank was proposed.

[0005]

The above-mentioned septic tank and domestic septic tank proposed by the present inventor enable efficient and deodorizing treatment of domestic sewage such as human waste and gray water, and create a new wind in the septic tank industry. It became a thing.

However, further research on the previously proposed septic tank revealed that there are problems to be solved.

That is, the septic tanks described in JP-A-63-158192 and JP-A-2-17995 are the same as conventional ones because the separation tank and the precipitation tank are in the form of a normal precipitation tank having a bottom taper. There is a problem that it requires space and no solution has been presented for making the entire septic tank compact.

In general, septic tanks are type-approved by the Ministry of Construction and their structure is fixed. Therefore, standardization and assembly-type methods are being considered for mass production in factories. Since the septic tank according to the above-mentioned previous proposal intervening the culture technology is not type approved (because it is necessary to receive a new type approval application (so-called section 8 application corresponding to “Eighth” of the Ministry of Construction notification)), It has not been standardized, and there is almost no proposal for a prefabricated type. Therefore, in a septic tank using sludge culture technology, standardization can be realized and production costs can be reduced.
Even in the case of RP, the development of a septic tank that makes the die manufacturing cost very low is desired.

Further, if the conventional type-approved septic tank can be modified and sludge culture technology can be applied, it is not necessary to manufacture a new mold, so that a significant cost reduction can be achieved. A solution is also desired.

Furthermore, in any of the above-mentioned proposed septic tanks, when solid matters in sewage are received in the reaction tank, they are diffused to the upper surface inside the reaction tank and not only difficult to remove, but also aesthetically unfavorable. It was Therefore, conventionally, a method of providing a basket for removing solids at the waste water discharge port in the reaction tank has been adopted, but if the basket is floated from the liquid surface, there is a problem that dust decomposes and gives off a bad odor. If the basket is soaked in the liquid, the basket will be clogged and sewage and dust will overflow from the basket.

On the other hand, in recent years, in addition to household sewage, the treatment of raw garbage has become a problem. In the actual situation, domestic sewage is treated in a septic tank and raw garbage is treated separately such as incineration or disposal. there were. However, incinerating food waste is costly, and when it is discarded, it has a problem of odor. Therefore, in addition to the treatment of domestic sewage, it is desired to develop a method for treating raw garbage that does not generate a bad odor at low cost.

[0012] Therefore, a first object of the present invention is to provide a septic tank for combined treatment, which can make the entire septic tank compact, realize standardization, and reduce the manufacturing cost.

A second object of the present invention is to provide a septic tank for combined treatment in which the conventional type-approved septic tank can be modified at low cost to apply the sludge culture technology.

Further, a third object of the present invention is to provide a septic tank for combined treatment, which can effectively remove solid matters in wastewater without generating a bad odor.

Further, a fourth object of the present invention is to provide a septic tank for merger treatment which can simultaneously receive and treat not only domestic sewage but also garbage.

[0016]

The inventor of the present invention has come to the present invention as a result of extensive studies to solve the above problems.

That is, the septic tank for merger processing according to the present invention is
A culture tank for multiplying and activating useful microorganisms, and a reaction stirring tank for introducing biological microorganisms from the culture tank and receiving wastewater such as human waste and gray water or domestic wastewater through the wastewater supply pipe for biological treatment. A first precipitation tank for solid-liquid separation of sludge sent from the reaction stirring tank, a contact tank for contacting the supernatant of the first precipitation tank with a filter medium, and a solid material sent from the contact tank In a combined treatment septic tank having a second settling tank for solid-liquid separating the contained suspension, the first settling tank is defined by substantially parallel partition walls.

In a preferred embodiment of the present invention,
(1) The septic tank main body is horizontally divided into a plurality of concrete skeletons, and at least one of the partition walls defining the first settling tank is formed in a fitting manner, and the fitting portion of the partition wall is It is provided that a plurality of them are provided and the gap between the partition walls is adjustable. (2) A solid matter removing device is provided in the waste water supply section in the reaction stirring tank, and the solid substance removing device is used for the reaction. It has a locking part for fixing to the stirring tank and a container-shaped main body having an upper opening, and an inclined screen is arranged on the side surface of the main body facing the waste water supply part, and the upper end of the inclined screen. The part has an arch-shaped solid material guiding portion, and further has a basket member for storing the solid material guided from the solid material guiding portion in a liquid in a dipped state, (3 ) An air diffuser is installed below the solids removal device in the reaction stirring tank. The upward flow generated by the air ejected from the air diffuser collides with the inclined screen and guides solid matter upward along the screen. (4) Supplying sewage to the reaction stirring tank It is to receive and treat raw garbage crushed together with sewage such as human waste and sewage or domestic wastewater through a pipe, and (5) a culture tank and a reaction stirring tank are provided adjacent to each other, and the inside of the culture tank is A notch hole is provided in the upper portion of the cross section of the sewage supply pipe that leads to the reaction stirring tank, and sludge cultivated in the culture tank is poured into the notch hole and is supplied to the reaction stirring tank together with the sewage, etc. (6 ) A water pipe for introducing the supernatant of the first precipitation tank to the lower part of the contact tank is provided at the inflow part to the contact tank, and an air diffuser pipe is installed at the lateral lower part of the outlet part of the water pipe, To generate upward flow and swirl flow by the air jetted from A.

[0019]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1 This example shows an example in which the septic tank for merger treatment of the present invention is formed by a concrete skeleton.

FIG. 1 is a schematic plan view showing an example of the combined treatment septic tank (excluding the lid portion) of the present invention, and FIG. 2 is a schematic sectional view showing an example of the combined treatment septic tank of the present invention.

In FIG. 1, the septic tank 1 is composed of a septic tank main body 1A formed of a concrete skeleton and a lid portion 1B.

Reference numeral 2 is a culture tank defined by a partition wall 3 formed integrally with the main body 1A. In the culture tank 2, a culture tank 4 is suspended in the liquid through a suspension member 6 on the main body 1A or the dirty water supply pipe 5.

The culture tank 4 is filled with a substance containing a microbial metabolite or the like containing phenol or a compound having a phenol-exposed group, such as pellet-shaped humus (hereinafter referred to as humus pellet). It is a tower. The humus pellets are filled between the punching metals arranged in multiple stages in the culture tank 4. It is preferable that the liquid is allowed to flow upward in the culture tank 4 to sufficiently bring the humus pellets into contact with the liquid. An air diffuser 7 is provided below the culture tank 4 in order to sufficiently bring the humus pellets into contact with the liquid. In the culture tank 2, the humus pellets come into contact with the sludge, the useful microorganisms in the sludge grow and activate, and the non-useful microorganisms lose their activation.

The culture tank 2 not only activates sludge, but also functions as a sludge storage tank and surplus sludge (cultivated sludge).
Is withdrawn from the sludge withdrawing section 8. Specifically, the sludge is drawn out through the sludge drawing hose 9. Sludge removal can be done by a mobile dewatering vehicle, which makes it possible to abolish the vacuum car. Further, since the sludge withdrawing section 8 is installed in the culture tank 2, sludge withdrawal can be performed, so that the management of the septic tank is simplified.

Reference numeral 10 is a reaction agitation tank in which useful microorganisms inhabit, and is defined by a partition wall 3 defining the culture tank 2 and a partition wall 11 fitted into the main body 1A. The reaction agitation tank 10 receives raw waste that has been crushed together with waste water such as human waste, gray water, and / or domestic waste water through the waste water supply pipe 5 for processing. Of course, it is natural that only sewage can be received and treated.

A solid matter removing device 12 is provided at the waste water supply portion, which is the tip of the waste water supply pipe 5. An example of the solid matter removing device 12 is shown in FIG. In FIG. 3, reference numeral 121 denotes a locking portion for fixing to the reaction stirring tank 10, which can be locked by hooking on a hooking portion 122 fixed to the partition wall 3 using, for example, a chain. Reference numeral 123 denotes a container-shaped main body having an upper opening, and an inclined screen 124 is provided on one of the four side surfaces facing the waste water supply unit. The inclined screen 124 has a gap of 2 to
A rod-shaped body or a plate-shaped body having a size of about 10 mm is used, but the shape of the rod-shaped body or the plate-like state is not limited as long as the object of the present invention is achieved.

At the upper end of the inclined screen 124, an arch-shaped solid matter guiding portion 125 is continuously provided. The solid material guiding portion 125 has a function of guiding the solid material to the basket member 13. Note that, of the four side surfaces, the side surfaces other than the side surface facing the dirty water supply portion are not particularly limited in configuration, but in the present embodiment, the side surfaces provided substantially parallel to the partition wall 3 (on the side in contact with the partition wall 3). The side surface) is composed of a screen, and the two side surfaces orthogonal to the partition wall 3 are composed of plate-shaped members. Furthermore, it is preferable that the bottom of the container-shaped main body 123 is formed of a screen or a mesh.

Although omitted in FIG. 3,
Of the four side surfaces of the arch-shaped solid material guiding portion 125 and / or the four side surfaces of the container-shaped main body 123, two side surfaces orthogonal to the partition wall 3 are further extended upward, and the solid material falls into the reaction stirring tank 10. It may be possible to prevent the diffusion.

The cage member 13 uses the chain 131 to cover the lid 1B.
Fixed to. It is preferable to immerse the basket member 13 in an amount of about 50 to 80% in order to prevent the solid matter stored therein from decaying.

The sewage supply pipe 5 passes through the inside of the culture tank 2 and supplies the raw waste crushed together with the sewage such as night soil, gray water and / or domestic waste effluent to the opening of the solid substance removing device 12 in the reaction stirring tank 10. Arranged as you can. A cutout hole 51 is provided in the upper portion of the cross section of the dirty water supply pipe 5. The sludge cultivated in the culturing tank 2 flows into the notch hole 51 and is sent to the reaction stirring tank 10 together with sewage and the like.

The inner diameter of the wastewater supply pipe 5 is determined so that the liquid level in the wastewater supply pipe 5 is 1/2 or less, preferably 1/3 or less of the pipe diameter. The notch hole 51 is preferably provided at a position higher than the liquid level in the wastewater supply pipe 5. This is to prevent the liquid in the dirty water supply pipe 5 from flowing out from the cutout hole 51.

In Japanese Patent Laid-Open No. 2-17995, a height-regulating insertion member is attached to the mouth for mixing the culture solution in the wastewater supply pipe, and therefore the presence of the insertion member causes a pressure loss to make the culture solution smooth. There was a risk that I would not go in. On the other hand, in the present invention, since only the notch hole does not cause pressure loss, there is no defect as in the prior art.

The size of the notch hole 51 may be any size as long as it can accept the maximum amount of sludge returned from the sludge measuring and distributing tank 19 described later. Reaction stirring tank 10 as in the present invention
By contacting the sewage with useful microorganisms in the sewage supply pipe 5 before reaching, the reaction time in the reaction agitation tank 10 can be reduced and the odor of the sewage can be prevented before reaching the reaction agitation tank.

Reference numeral 14 is an air diffuser, which is installed below the solid matter removing device 12. When air is ejected from the air diffusing tube 14, an ascending flow occurs in the reaction stirring tank 10 and a swirling flow like an arrow occurs in the reaction stirring tank 10.

Reference numeral 15 is a first settling tank formed by a gap between the fitting partition wall 11 on the main body 1A and the fixed partition wall 16 on the main body 1A. The precipitation tank 15 separates solid and liquid only by rectifying it at a low flow rate, and unlike a general taper type precipitation tank, it is formed between two substantially parallel walls and does not take up a space.

The term "substantially parallel" as used herein means to include a slight inclination that does not increase the space.

The sludge that has settled is sent to the sludge header pipe 18 via the return sludge pipe 17 by the air lift, sent to the sludge metering distribution tank 19, and returned to the reaction stirring tank 10 and the culture tank 2. The structure of the sludge metering and distribution tank 19 is not particularly limited, but it is preferable that the distribution amount can be varied. Reference numeral 181 is a peep portion provided in the middle of the sludge header pipe 18. By installing this peep portion 181, the property of sludge can be visually determined.

Reference numeral 20 is a contact tank defined by a partition wall 16 fixed to the main body 1A and a partition wall 21 fitted therein. In the contact tank 20, a filling tank 201 filled with a silica filter medium that elutes silicate ions is fixed. As the silica filter medium, andesitic and rhyolite pumice is used, for example. 202 is an air diffuser for backwashing. The air diffuser 202 is provided on the lower surface of the filling tank 201.

Reference numeral 203 is a water pipe for introducing the supernatant of the first precipitation tank 201 to the lower part of the contact tank 20. 205
Is a sludge return pipe, which is connected to the sludge header pipe 18.

A disinfection tank 23 is formed in the second precipitation tank 22, and the disinfection tank 23 is filled with a sterilizing agent 230. Reference numeral 24 is a discharge pipe for discharging the disinfected processing liquid to the outside of the system.

Next, using the septic tank having the above structure,
A method for receiving and treating sewage such as human waste, sewage and / or domestic sewage, or receiving and crushing raw garbage together with the sewage will be described.

Sewage such as human waste, miscellaneous wastewater, domestic wastewater and / or crushed raw garbage, together with the sludge cultivated in the culturing tank 2, pass through the sewage supply pipe 5 and the solid substance removing device 12 in the reaction stirring tank 10 is removed. Sent to. Inclined screen 1 out of solids
Those having a gap of 24 or more remain in the solid removing device 12 and are separated.

When air is ejected from the air diffusing pipe 14, an ascending flow occurs in the reaction stirring tank 10, and the ascending flow collides with the inclined screen 124 to guide the solid matter upward along the screen 124. . In addition to the above-described upward flow, a swirling flow such as an arrow (see FIG. 2) is generated in the reaction stirring tank 10, so that the solid matter is accumulated in the vicinity of the solid matter guiding section 125. The accumulated solid matter is scraped by, for example, a skewer member (not shown) fitted to the inclined screen 124, dropped into the basket member 13, and stored. As a method of moving the solid matter from the solid matter removing device 12 to the basket member 13, in addition to the mechanical means, it may be directly guided to the basket member 13 by the swirling flow, but in that case, the reaction stirring tank 10 The liquid surface of the above is above the solid material guiding portion 125.

The basket member 13 is immersed in about 50 to 80% to prevent the solid matter stored therein from decaying. It is considered that the reason why this decay can be prevented is that the useful microorganisms cultured in the reaction stirring tank 10 inactivate or kill the anaerobic bacteria.

While turning the sludge in the reaction stirring tank 10,
Contact with sewage, etc. to decompose and / or stabilize (insolubilize or insolubilize) organic matter in sewage or garbage. It is presumed that this decomposition and / or stabilization action is a synergistic effect of culturing with humus pellets and silicate ions eluted in the contact tank 20. Since the sedimented sludge in the contact tank 20 is returned to the culture tank 2 via the sludge return pipe 205, the eluted sludge component is contained in the culture sludge.

In the present invention, microorganisms that contribute to the decomposition and / or stabilization of such organic substances are called useful microorganisms.

The sludge in the reaction stirring tank 10 is solid-liquid separated in the first settling tank 15 only by rectifying it at a low flow rate. In addition, raw garbage other than sewage that passes through the inclined screen 124 becomes sludge after being decomposed and / or stabilized in the reaction stirring tank 10.

The settled sludge is returned to the culture tank 2 via the return sludge pipe 17 and is withdrawn from the sludge withdrawing section 8. The excess sludge generated due to the biological reaction is extremely small, but the sludge corresponding to that is also returned to the culture tank 2 via the return sludge pipe 17 and withdrawn from the sludge withdrawing section 8. Sludge removal is done by a mobile dehydrator.

Organic substances by stabilizing action of useful microorganisms,
Since a considerable part of the solid matter is insolubilized and becomes insoluble and the soil sludge is derivatized or assimilated, the sludge can be dehydrated without adding a coagulant. The dehydrated sludge (cake) is a good quality compost with no odor and can be returned to farmland.

Further, as described above, the cells that spoil the sludge cannot occupy the preferential species in the reaction stirring tank 10, so that the suspended matter (ss) that dissolves slowly can be completely removed without decomposition (decomposition or sludge). You can

The supernatant of the first settling tank 15 is a water pipe 203.
Is introduced into the lower part of the contact tank 20 through the air and is discharged from the air diffusing tube 204 to form an upward flow.
By reaching the upper part of 1 and downstream in the filling tank 201, the silica filter material is brought into contact with the silica filter material smoothly and effectively, and is sent to the second precipitation tank 22 through the lower part of the partition wall 21. Second
The treatment liquid disinfected in the disinfection tank 23 in the settling tank 22 is discharged to the outside of the system via the discharge pipe 24.

Example 2 This example shows an example in which the concrete skeleton of Example 1 is assembled.

FIG. 4 is an exploded perspective view showing a method for assembling the concrete skeleton.

As shown in the figure, the septic tank main body 1A has four concrete skeletons, namely, a bottom skeleton 101 and a lower skeleton 10.
2, divided into an intermediate skeleton 103 and an upper skeleton 104, each of which is manufactured in advance in a factory before being installed on site.

The bottom frame 101 is provided with a bottom plate, and in terms of shape, the partition walls 3 and 16 are provided, and the groove 10 for fitting the insertable partition walls 11 and 21 (see FIG. 1).
The feature is that 5, 106 are provided.

It should be noted that in FIG. 4, the partition wall 1 of the fitting type is shown.
Although the groove portions 105 and 106 are provided to fit the grooves 1 and 21, the fitting method is not limited to the groove portion and other methods may be used.

The lower skeleton 102 has an upper and lower opening structure and corresponds in shape to the bottom skeleton 101. Intermediate structure 10
3 and the upper skeleton 104 also have the same structure as the lower skeleton 102.

It is preferable that the bottom body 101, the lower body 102, the intermediate body 103, and the upper body 104 are closely packed by an adhesive at the time of installation, and the adhesive used is not particularly limited.

Manhole holes 107 are provided in advance in the lid portion 1B for sealing the upper skeleton 104 so as to correspond to the respective tanks.

In order to manufacture the buried septic tank 1 using the above-mentioned skeleton, first, a hole is dug in the installation site at a depth and a size that can be buried. Next, a base material is provided on the bottom surface of the hole. Next, the bottom body 101 is mounted, the upper body is coated with an adhesive and the lower body 102 is placed, and then the upper surface is coated with an adhesive and the intermediate body 1 is mounted.
03 is placed, and the upper surface is coated with an adhesive and the upper body 104
Put. Repair the bonded part if necessary. Next, the necessary partition walls are installed and devices are installed. Then the lid 1
Place B and fix.

When installed underground, the lid 1B
The upper surface of the can also be used for other purposes, such as a parking lot.

When the septic tank is installed on the ground, it can be installed on the base material in the same manner as above. Since the septic tank of the present invention produces almost no odor, it can be installed on the ground.

By adopting the assembly type as described above, mass production becomes possible and manufacturing cost can be reduced.

Example 3 This example shows an example in which the septic tank for merger treatment of the present invention is formed of an FRP skeleton.

FIG. 5 is a schematic sectional view showing an example formed by the FRP skeleton, and the septic tank shown in the figure is structurally substantially the same as the concrete skeleton. In the figure,
Since the portions having the same reference numerals as those shown in FIGS. 1 and 2 have the same configuration, the description thereof will be omitted.

By forming with such an FRP skeleton, it is possible to realize a weight reduction compared to a concrete skeleton and to reduce the cost. In addition, the multi-division molding of the septic tank body can shorten the manufacturing period, and shorten the construction period.

Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to these, and the septic tank of the present invention can be manufactured by simply modifying an existing septic tank of which type is approved. That is, although the existing septic tank has an adjusting tank, a reaction tank, and a precipitation tank, the adjusting tank is a culture tank, and the reaction tank is a reaction agitation tank, a first precipitation tank, and a contact tank with an insertable partition wall. It can be modified by making the tank a second settling tank.

The septic tank for merger treatment of the present invention can be applied to both large merger treatment and small merger treatment.

In the above embodiments, the septic tank in which the first settling tank is formed by the substantially parallel partition walls has been described, but the first settling tank is not formed by the substantially parallel partition walls. The solid matter removing device as shown in FIG. 3 can be applied to a septic tank which is a conventional type precipitation tank. Alternatively, the solid matter removing device as shown in FIG. 3 can be applied to a septic tank having a culture tank and a reaction tank.

Further, in this case, as in the above-described embodiment, an air diffusing pipe is provided in the lower part of the solid substance removing device, and the upward flow generated by the air jetted from the diffusing pipe collides with the inclined screen to remove the solid substance. It is preferable to adopt a mode in which the screen is guided upward along the screen.

[0072]

According to the first aspect of the present invention, since the first settling tank is defined by the partition walls that are substantially parallel to each other, the entire septic tank can be made compact and the installation space can be saved.

According to the second aspect of the present invention, the septic tank main body is horizontally divided into a plurality of concrete skeletons,
Since at least one of the partition walls defining the first settling tank is formed in a fitting manner, standardization can be realized and mass production can be performed using a mold, so that the manufacturing cost can be reduced. Also, the culture technology can be applied by modifying a conventional type-approved septic tank at low cost. Further, since a plurality of fitting portions of the partition walls are provided and the gap between the partition walls is adjustable, the volume and / or water area of the first settling tank can be changed, and the property of the sewage can be changed. It becomes possible to respond to changes and changes in microorganisms.

According to the third aspect of the present invention, a solid substance removing device is provided in the waste water supply part in the reaction stirring tank, and the solid substance removing device has a locking part for fixing to the reaction stirring tank. And a container-shaped main body having an upper opening, wherein a tilted screen is arranged on the side surface of the main body facing the waste water supply unit,
Further, the upper end of the inclined screen has an arch-shaped solid material guiding portion, and further has a basket member for storing the solid material guided from the solid material guiding portion in a liquid in a dipped state. As a result, the solid matter in the wastewater can be separated by a screen, and the separated solid matter can be stored in a dipped state, and can be effectively decomposed and removed by the action of useful microorganisms without generating a bad odor.

According to the invention described in claim 4, an air diffuser is provided below the solids removing device in the reaction stirring tank, and an upward flow generated by the air jetted from the air diffuser collides with the inclined screen. However, by guiding the solid matter upward along the screen, the solid matter can be effectively stored in the basket member.

According to the fifth aspect of the present invention, the reaction agitation tank receives and treats the crushed raw garbage together with the wastewater such as human waste and gray water or domestic wastewater through the wastewater supply pipe. The problem of household waste can be solved without using an incinerator.

According to the invention of claim 6, a culture tank and a reaction stirring tank are provided adjacent to each other, and a notch hole is provided in the upper section of the cross section of the sewage supply pipe that reaches the reaction stirring tank through the inside of the culture tank. Since the sludge cultivated in the culture tank is poured into the notch hole and is supplied to the reaction stirring tank together with the sewage and the like, the structure is simple and pressure loss does not occur, and sewage and useful microorganisms are generated in the sewage supply pipe. By contacting, not only the reaction time in the reaction stirring tank can be reduced, but also the malodor of dirty water can be prevented before reaching the reaction stirring tank.

According to the invention described in claim 7, a water pipe for introducing the supernatant of the first precipitation tank to the lower part of the contact tank is provided at the inflow portion to the contact tank, and the side of the outlet portion of the water pipe is provided. An air diffuser is installed in the lower part of the flow path, and the air jetted from the air diffuser causes an upward flow and a swirling flow to cause the liquid in the contact tank to contact the filter medium in the filling tank smoothly and effectively, thereby making contact. The processing time in the tank can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an example of a septic tank for merger processing (excluding a lid).

FIG. 2 is a schematic cross-sectional view showing an example of a septic tank for merger processing.

FIG. 3 is a perspective view showing an example of a solid matter removing device.

FIG. 4 is an exploded perspective view showing a method for assembling a concrete skeleton.

FIG. 5 is a schematic cross-sectional view showing an example formed by a FRP body.

[Explanation of symbols]

 1: Septic tank 1A: Septic tank main body 1B: Lid 101: Bottom skeleton 102: Lower skeleton 103: Intermediate skeleton 104: Upper skeleton 105, 106: Groove 2: Culture tank 3: Partition wall 4: Culture tank 5: Waste water supply pipe 51 : Notch hole 6: Suspension member 7: Air diffuser 8: Sludge extraction part 9: Sludge extraction hose 10: Reaction stirring tank 11: Partition wall 12: Solids removing device 121: Engagement part 122: Hook part 123: Container Main body 124: Inclined screen 125: Solid matter guiding part 13: Basket member 131: Chain 14: Diffuser pipe 15: First settling tank 16: Partition wall 17: Return sludge pipe 18: Sludge header pipe 181: Peep part 19: Sludge Distributing tank 20: Contact tank 201: Filling tank 202: Air diffuser 203: Water pipe 204: Air diffuser 205: Sludge return pipe 21: Partition wall 22: Second settling tank 23: Extinguishing Bath 230: Fungicide 24: discharge pipe

Front Page Continuation (72) Inventor Akira Fujimatsu 2-1-1 Chuo, Matsumoto City, Nagano Toyo Bio Reactor Co., Ltd. (72) Inventor Akio Nuka 2872-2 Ikomicho, Midori-ku, Chiba City, Chiba Prefecture ) Inventor Hiroyuki Suzuki 2-10-2 Hamamatsucho, Minato-ku, Tokyo Kanae Co., Ltd.

Claims (7)

[Claims] 1. A culture tank for growing and activating useful microorganisms, and a biological treatment by introducing useful microorganisms from the culture tank and receiving wastewater such as human waste and gray water or domestic wastewater through a wastewater supply pipe. A reaction stirring tank to be carried out, a first precipitation tank for solid-liquid separating sludge sent from the reaction stirring tank, and a first precipitation tank
A contact tank for contacting the supernatant of the precipitation tank with the filter medium, and a solid-liquid separation of a solid-containing suspension sent from the contact tank
In the septic tank for merger treatment, which has a settling tank, the first
A septic tank for combined treatment, wherein the settling tank is defined by substantially parallel partition walls. 2. A septic tank main body is horizontally divided into a plurality of concrete skeletons, at least one of partition walls defining the first settling tank is formed in a fitting manner, and the partition walls are fitted. The septic tank for merger treatment according to claim 1, wherein a plurality of parts are provided and the gap between the partition walls is adjustable. 3. A solid substance removing device is provided in a waste water supply part in the reaction stirring tank, and the solid substance removing device has a locking part for fixing to the reaction stirring tank, and a container-like main body having an upper opening. An inclined screen is disposed on a side surface of the main body facing the waste water supply part, and an arch-shaped solid material guiding portion is provided at an upper end portion of the inclined screen. The septic tank for combined treatment according to claim 1 or 2, further comprising a basket member that stores the solid matter guided from the guiding portion in a liquid in a dipped state. 4. An air diffusing pipe is provided below the solid substance removing device in the reaction agitation tank, and an upward flow generated by air ejected from the diffusing pipe collides with the inclined screen, so that the solid substance is struck on the screen. The septic tank for combined treatment according to claim 3, wherein the septic tank is guided upward along the septic tank. 5. The reaction agitation tank, via a wastewater supply pipe,
The raw garbage crushed together with the wastewater such as human waste and gray water or domestic wastewater is received and treated.
The septic tank for merger treatment according to 2, 3 or 4. 6. A culture tank and a reaction stirring tank are provided adjacent to each other, and a notch hole is provided at an upper portion of a cross section of a sewage supply pipe passing through the inside of the culture tank to reach the reaction stirring tank, and the notch hole is used for culture in the culture tank. The septic tank for combined treatment according to any one of claims 1 to 5, wherein the treated sludge is poured and supplied to the reaction stirring tank together with the wastewater and the like. 7. A water pipe for introducing the supernatant of the first precipitation tank to the lower part of the contact tank is provided at an inflow part to the contact tank, and an air diffuser pipe is installed at a lateral lower part of an outlet part of the water pipe. 7. The combined treatment septic tank according to any one of claims 1 to 6, wherein an upward flow and a swirl flow are generated by the air jetted from the air diffuser.