JP2006130448A - Apparatus for treating sewage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for treating sewage which purifies the sewage by solving the generation of scum in a tank and also prevents the occurrence of sewage treatment functional disorder due to a blockage of the sewage. <P>SOLUTION: The apparatus for treating the sewage forms: a unit U by providing an inner lengthwise cylinder 1 having a large number of outflow holes 2 on a lower peripheral wall face 1b and mounting a sewage inflow port 4 connecting a raw sewage pipe 3 to an upper end part 1a; an outer lengthwise cylinder 5 surrounding the inner cylinder 1, also closing an upper end part 5a and an lower end part 5b, and mounting a sewage outflow port 6 which opens outside to the upper end part 5a; and an air supply pipe 8 with an air blower 7 into which the inner cylinder 1 is inserted and in which an air injection port 8a at the tip end is opened at the bottom part 1c of the inner cylinder 1. The unit U is installed adjacent to a sewage treatment tank 9 embedding a microbe carrier 11, and a by-pass water supply pipe 30 is connected from an upper part position of the sewage inflow port 6 of the inner lengthwise cylinder 1 of the unit U to the water supply pipe 10 having a higher position than a sewage discharge port 39 of the sewage treatment tank 9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a treatment apparatus for purifying sewage such as manure discharged from a domestic flush toilet or the like.

Usually, manure discharged from a domestic flush toilet is sent to a large-scale sewage treatment plant through a sewage pipe in a city and purified to a certain standard before being discharged into a river or the like.
On the other hand, in depopulated areas without large-scale sewage pipe facilities, it has been promoted to set up and process septic tanks for each village, and improvement works are being carried out in various parts of the country. The facilities of the merged tank are expensive, and it is difficult for local governments and residents to bear such costs.

On the other hand, in a depopulated area, it is ideal to treat in a pollution source instead of collecting waste as a countermeasure for environmental pollutants, and as a treatment method in individual houses that are the source of sewage, seepage dredging method or individual septic tank method However, some of these facilities are incomplete due to the lack of installation space. As a result, sewage is discharged into the river without sufficient treatment. Often it is released.
In addition, even if the sewage is sufficiently treated, in order to maintain the treatment function, the removal of lump (scum) composed of light oils and fats with low specific gravity generated on the water surface of the sewage tank and the extraction of precipitated sludge are performed regularly. In other words, there is a large amount of labor and cost required for the processing.
In particular, until now, even if a method of deodorizing with a deodorant or the like has been used, the amount of generated malodor from scum has been large and continuously generated, so that it has not been possible to easily prevent it.
In addition, worms, which are larvae of insects such as moths, were generated on scum, and as such, they were unsanitary and were treated with insecticides.

Therefore, the present inventor previously proposed a scum eliminating sewage treatment apparatus of the type in which the inner vertical cylinder is housed in the outer vertical cylinder shown in Patent Document 1.
In this device, it was possible to eliminate the generation of scum that could cause bad odors and insects, and to purify the sewage until it became clean, but if sludge settles inside the outer vertical cylinder, The sewage that flows into the inner vertical cylinder cannot flow from the bottom of the inner vertical cylinder to the outer vertical cylinder and stays in the upper part of the inner vertical cylinder. The sewage sometimes overflowed.
In addition, if the concentration of sludge flowing in is high and bubbles are generated and accumulated in the upper part of the inner vertical cylinder, it becomes difficult to release the air to the outside and it is difficult to continue aeration. It was.
Furthermore, when sludge deeply settles at the bottom in the outer vertical cylinder whose top is closed, the flow of sewage stops, but the sludge cannot be removed.
In such a state, the sewage treatment function is lowered, and in the worst case, the treatment function may be stopped.
JP2003-275756

  The present invention has been made in view of the above circumstances, and in the scum-resolving sewage treatment proposed previously, the generation of scum that is formed and accumulated on the water surface is eliminated, and the sewage is further purified. In addition to obtaining clean and treated water, the present invention provides a technique capable of solving the above-mentioned problems that impede the sewage treatment function of the scum-resolving sewage treatment apparatus so far.

  The sewage treatment apparatus of the present invention for solving the above-described problems includes a form using a single unit and a form using a plurality of units constituting the apparatus.

First, the invention according to claim 1, wherein a single unit is used, is provided with a sewage inlet having an open top and a bottom and a number of outflow holes in the lower peripheral wall, and a raw sewage pipe connected to the top. An inner vertical cylinder, and a sewage outlet that surrounds the inner cylinder and has an upper end closed at the side wall surface portion of the lower opening of the inner vertical cylinder, closed at the lower end in a bowl shape, and opened outward near the upper end. The outer vertical cylinder provided is formed, and an air supply pipe with a blower is inserted near the bottom from the upper end of the inner vertical cylinder to form a single unit. A sewage treatment tank is installed so that a carrier is embedded and an air supply pipe with a blower is opened in a lower layer in the sewage treatment tank, and the sewage in the sewage treatment tank is positioned lower than the sewage outlet of the outer vertical cylinder. Provide a discharge port, higher than the sewage discharge port in the sewage treatment tank A sewage treatment apparatus which the water pipes to mouth connected to the sewerage outlet,
By connecting a bypass water pipe from the position above the sewage inflow port of the inner vertical cylinder to the water pipe higher than the sewage discharge port of the sewage treatment tank, the sewage accumulated in the inner vertical cylinder It is possible to flow out to the sewage treatment tank through a bypass water pipe.

Next, the invention according to claim 2, wherein a plurality of units are used, the apparatus using a plurality of units is connected to the first unit, and the subsequent units are connected to each other. An inner vertical cylinder provided with a sewage inlet to which an original sewage pipe is connected near the upper end, and a side wall surface of the lower opening of the inner vertical cylinder surrounding the inner vertical cylinder An outer vertical cylinder is provided with a sewage outlet opening that closes at the site, closes in a bowl shape at the lower end, and opens outward near the upper end. And, the first unit is configured by inserting an air supply pipe with a blower near the bottom from the upper end of the inner vertical cylinder, and then the upper end and the bottom are open and have a large number of outflow holes in the lower peripheral wall surface, An inner vertical cylinder provided with a sewage inlet connected to a water supply pipe near the upper end, an inner vertical cylinder that surrounds the inner vertical cylinder, and the upper end is closed at the side wall surface portion of the lower opening of the inner vertical cylinder, and the lower end is a bowl shape And an outer vertical cylinder provided with a sewage outlet that opens to the outside near the upper end, and an air supply pipe with a blower is inserted near the bottom from the upper end of the inner vertical cylinder. The sewage outlet of the first unit is connected to the sewage inlet of the subsequent unit via a water pipe near the sewage treatment tank, and one or more sewage outlets of the unit is connected to the subsequent unit. Connect to the sewage inlet via a water pipe. The microbial carrier is embedded in the middle layer in the sewage treatment tank, and an air supply pipe with a blower is provided so as to open in the lower layer in the sewage treatment tank. A sewage discharge port of the sewage treatment tank is provided at a position lower than the sewage outlet of the cylinder, and a water supply pipe opened at a position higher than the sewage discharge port in the sewage treatment tank is provided on the outer vertical cylinder of the last unit. A sewage treatment apparatus connected to a sewage outlet,
By connecting a bypass water pipe from the position above the sewage inlet of each inner vertical cylinder to the water pipe higher than the sewage discharge port of the sewage treatment tank, the sewage accumulated in the respective inner vertical cylinders Is allowed to flow out to the sewage treatment tank through the bypass water pipe.

  According to a third aspect of the present invention, in the above configuration, the outer vertical cylinders of each unit are connected and integrated in one tank, or the outer vertical cylinders of each unit and the sewage treatment tank are combined in one tank. It is constructed by connecting and integrating.

  According to a fourth aspect of the present invention, in the above configuration, a sludge extraction / inspection port is provided on an upper portion of the outer vertical cylinder.

  According to a fifth aspect of the present invention, in the above configuration, the sewage treatment tank is composed of an aeration chamber on the inflow side and a carrier chamber on the outflow side in which the microbial carrier is housed, and the return chamber is connected to the carrier chamber and the raw sewage pipe. The return pipe is provided with a pump so that the sewage in the carrier chamber can be sent to the raw sewage pipe.

  According to a sixth aspect of the present invention, in the above-described configuration, a filtration device having a water filtering means is provided at a sewage discharge port of the sewage treatment tank via a water supply pipe, and the treated water can be discharged to the outside through the filtration device. It is what I did.

  In the seventh aspect of the present invention, in the above configuration, the microorganism carrier is arranged in the middle water submerged area formed between the outer vertical cylinder and the inner vertical cylinder.

The present invention is as described above, and the inflow sewage containing feces and urine is dispersed in the unit by the continuous stirring by the air sent from the air pipe, and the suspended matter cannot be collected on the water surface. Scum is prevented, the generation of peculiar bad odors and maggots generated from the scum is eliminated, and sewage is decomposed by microorganisms at the lower end of the mortar shape in each unit.
Furthermore, in a form in which the sewage treatment tank is formed in the aeration chamber and the outflow side carrier chamber containing the microbial carrier, the treatment can be sufficiently performed until the sewage becomes more transparent.
Also, if the carrier chamber and the raw sewage pipe are connected via a return pipe, the sewage in the carrier chamber can be sent to the raw sewage pipe by a pump, so that the microorganisms that decompose the sludge by putting the grown microorganisms in the first unit It is possible to further promote the purification by effectively utilizing.
And, by providing a bypass water pipe connected to the sewage treatment tank at the upper part of the inner vertical cylinder, excessive sewage flows into each unit, or at the bottom of the inner vertical cylinder or outer vertical cylinder of each unit. When the sludge is clogged and the upper part of the inner vertical cylinder is full, the inflowing sewage can be sent directly to the sewage treatment tank via the bypass water pipe, bypassing the unit. As a result, the sewage can be prevented from overflowing from the opening at the top of the inner vertical cylinder of the unit.

In addition, in the form in which the sludge extraction / inspection port is provided at the upper part of the outer vertical cylinder, the inside of the tank is inspected from there, or a sludge suction pipe is inserted, and the sludge extraction port inspection port accumulates in the outer vertical cylinder. The sludge can be removed as appropriate, and the flow of sewage blocked by the sludge can be recovered to return the treatment function to normal.
Further, by sending sewage from the sewage treatment tank to the filtration device, the sewage treated before that is further filtered by the filtering means in the filtration device, and the purified water can be drained to the outside.
Further, in the embodiment in which the microbial carrier is disposed in the middle layer submerged area between the outer vertical cylinder and the inner vertical cylinder, the organic matter in the sewage is treated with the microbial carrier, and the sewage can be further purified.
Furthermore, in the form in which a plurality of units and the sewage treatment tank are integrated, the entire apparatus can be made more compact, can be installed on a narrow site, and the manufacturing cost of the apparatus can be reduced.

The embodiment of the sewage treatment apparatus of the present invention will be described in detail below.
The sewage treatment apparatus has a form using a single unit and a form using a plurality of units.

First, the form of an apparatus using a single unit constituting the sewage treatment apparatus will be described.
As shown in FIGS. 1 and 2, the unit U of this apparatus has an upper end 1a and a bottom 1c that are open and has a large number of outflow holes 2 in the lower peripheral wall surface 1b. An inner vertical cylinder 1 provided with a sewage inlet 4 connected thereto, and an upper end 5a that surrounds the inner cylinder 1 and is closed at a side wall surface portion of the lower opening of the inner vertical cylinder 1, and a lower end 5b is closed in a bowl shape. The outer vertical cylinder 5 provided with a sewage outlet 6 that opens to the outside is formed near the upper end 5a.
Therefore, in this unit U, a first chamber is formed in the inner vertical cylinder 1, and a second chamber is formed outside the peripheral wall surface of the inner vertical cylinder 1 and in the outer vertical cylinder 5. The one chamber and the second chamber are in communication with each other by a large number of outflow holes 2 such as a mesh, a slit group, and a small hole group provided on the peripheral surface of the lower end portion of the inner vertical cylinder 1.
Then, for the purpose of stirring the whole sewage in the inner vertical cylinder 1 and supplying oxygen, the inner vertical cylinder 1 is inserted near the bottom 1c from the upper end 1a, and the tip air inlet 8a is the bottom of the inner vertical cylinder 1 An air supply pipe 8 with a blower 7 opened in 1c is provided.

In addition, the unit U having the above-described configuration is installed next to the sewage treatment tank 9 so that the microorganism carrier 11 is embedded in the middle layer of the sewage treatment tank 9 and the air supply pipe 8 with the blower 7 is provided in the sewage treatment tank 9. It is provided so as to open in the lower layer.
The sewage treatment tank 9 is treated by the unit U after the sewage flowing from the raw sewage pipe 3 is guided to the sewage treatment tank 9, so that the amount of sludge entering the sewage treatment tank 9 is small.
The air injection into the sewage treatment tank 9 is performed by supplying oxygen to the installed microorganism carrier 11 and dispersing the solid matter floating on the surface of the sewage in the sewage treatment tank 9 so that the solid matters adhere to each other. The purpose is to stir the upper part of the sewage to prevent lumps.
Then, a sewage discharge port 39 of the sewage treatment tank 9 is provided at a position lower than the sewage outflow port 4 of the outer vertical cylinder 5, and the sewage discharge port 39 in the sewage treatment tank 9 is opened higher than the sewage discharge port 39. The water pipe 10 is connected to the sewage outlet 6 so that the sewage outlet 6 of the unit U is above the liquid level L of the sewage treatment tank 9.

  Thus, a sewage treatment apparatus using a single unit is configured, and the sewage treatment apparatus has a position higher than the sewage inlet 6 of the inner vertical cylinder 1 and higher than the sewage discharge port 39 of the sewage treatment tank 9. The bypass water supply pipe 30 is connected to the water supply pipe 10 so that the sewage accumulated in the inner vertical cylinder 1 can flow out to the sewage treatment tank 9 through the bypass water supply pipe 30.

Next, the form of an apparatus using a plurality of units will be described.
As shown in FIG. 3, the unit of this apparatus has sewage in which an upper end 1a and a bottom 1c are opened and a plurality of outflow holes 2 are formed in a lower peripheral wall surface 1b, and a raw sewage pipe 3 is connected to the upper end 1a. An inner vertical cylinder 1 provided with an inflow port 4, an inner vertical cylinder 1 surrounding the inner vertical cylinder 1, and an upper end 5 a are closed at a side wall surface portion of the lower opening of the inner vertical cylinder 1, and a lower end 5 b is closed like a bowl, It is formed with the outer vertical cylinder 5 provided with the sewage outlet 6 that opens to the outside near the portion 5a.
The first unit is configured by inserting an air supply pipe 8 with a blower 7 near the bottom 1c from the upper end 1a of the inner vertical cylinder 1.

Next, an inner vertical cylinder 21 having an upper end portion 21a and a bottom portion 21c that are open and having a plurality of outflow holes 22 in the lower peripheral wall surface 21b, and a sewage inlet 24 connected to a water supply pipe 23 near the upper end portion 21a; The sewage outlet that surrounds the inner vertical cylinder 21 and that the upper end 25a is closed at the side wall surface portion of the lower opening of the inner vertical cylinder 21, the lower end 25b is closed in a bowl shape, and opens to the upper end 25a. And an outer vertical cylinder 25 provided with 26.
Then, the air supply pipe 8 with the blower 7 is inserted near the bottom 21c from the upper end 21a of the inner vertical cylinder 21 to constitute one subsequent unit N.
Then, the sewage outlet 6 of the first unit U is connected to the sewage inlet 24 of the subsequent unit N via the water supply pipe 23 near the sewage treatment tank 9 or one unit, or further the sewage outlet of the unit N. A plurality of units 26 are connected to the sewage inflow port 24 of the subsequent unit N through the water supply pipes 23.

Then, the microorganism carrier 11 is embedded in the middle layer in the sewage treatment tank 9, and the air supply pipe 12 with the blower 7 is provided so that the opening 12 a reaches the lower layer in the sewage treatment tank 9.
A sewage discharge port 39 of the sewage treatment tank 9 is provided at a position lower than the sewage outlet 26 of the outer vertical cylinder of the last succeeding unit N, and is positioned higher than the sewage discharge port 39 in the sewage treatment tank 9 Is connected to the sewage outlet 26 of the outer vertical cylinder 25 of the last unit N so that the sewage outlet 26 of the unit N is above the liquid level L of the sewage treatment tank 9. .

  The sewage treatment apparatus using a single unit is configured as described above. In this sewage treatment apparatus, the sewage treatment tank 9 is disposed at positions higher than the sewage inlets 6 and 26 of the inner vertical cylinders 1 and 21 from the upper positions 1a and 21a. Bypass water supply pipes 30 and 31 are connected to the water supply pipes 23 and 20 which are located higher than the sewage discharge port 39, and the sewage accumulated in the inner vertical cylinders 1 and 21 is filled with the bypass water supply pipes 30 and 31. Through the sewage treatment tank 9.

Further, a sludge extraction / inspection port 32 is provided at the upper part of the outer vertical cylinder 5.
Then, a sludge suction pipe 34 is inserted into the sludge extraction / inspection port 32 to the bottom 5b of the outer vertical cylinders 5 and 25, and a pump 33 is provided for extracting the sludge so that the sludge suction pipe 34 can pull out the sludge. Can be.
Further, the sludge extraction / inspection port 32 can inspect the state of the inside, and an air supply pipe can be inserted into the upper portion from here to stir the upper layer portion.

  Further, the sewage treatment tank 9 is composed of an aeration chamber 37 on the inflow side and a carrier chamber 38 on the outflow side in which the microorganism carrier 11 is housed, and the inside of the carrier chamber 38 and the raw sewage pipe 3 are connected via a return pipe 35. A configuration in which the pump 36 is connected to the return pipe 35 and the sewage in the carrier chamber 38 can be sent to the raw sewage pipe 3 is possible.

  In addition, a filtration device 41 provided with water filtering means 42 may be provided at the sewage discharge port 39 of the sewage treatment tank 9 through a water supply pipe 40 so that the treated water can be drained to the outside through the filtration device 41. it can.

Furthermore, the microorganism carrier can be arranged in the middle layer submerged area between the outer vertical cylinder and the inner vertical cylinder.
Various microorganism carriers have been proposed, such as granular, net-like, plate-like, and string-like, and these can be used. Examples of the material include ceramic, plastic, glass, and organic fiber.
The granular microbial carrier 45 can be put in an elongated net bag 46 and can be taken in and out from a loading / unloading port with a lid provided on the outer vertical cylinder as shown in FIG.
Since organic pollutants in the sewage are decomposed by the microorganisms propagated by the microbial carrier, the treatment capacity is further enhanced.

  Furthermore, as shown in FIG. 5, each unit can connect and integrate the outer vertical cylinders into one tank, and the outer vertical cylinders of each unit and the sewage treatment tank can be integrated into one tank. Can be connected and integrated. Then, the whole apparatus can be made more compact. In this way, installation on a narrow site is possible.

The present invention has the above-described configuration, and its operation will be described below.
When the sewage flows into the first chamber in the inner vertical cylinder 1, the entire sewage is constantly stirred in a turbid state by bubbles by continuously injecting air into the lower layer of the indoor sewage.
Normally, suspended matter floats on the water surface, the outermost surface in the form of a film is dried, and the suspended matter adheres to the lower surface to form a thick layer to form a lump (scum). Since the suspended matter cannot be formed into a film on the water surface in the inner vertical cylinder 1 due to the continuous stirring by, scum does not occur.

Due to the flow of new sewage into the first chamber in the inner vertical cylinder 1, the water level fluctuates in the room, and when the first chamber increases due to this fluctuation, the turbid sewage becomes lower in the first chamber of the inner vertical cylinder 1. It passes through a large number of outflow holes 2, 22 provided in the section, coarsely filtered, and flows out into the second chamber in the outer vertical cylinder 5.
Then, if the first chamber is reduced due to a decrease in the amount of sewage in the first chamber in the inner vertical cylinder 1 after the inflow is stopped, the turbid sewage from the second chamber in the outer vertical cylinder 5 is reduced in the first chamber. It passes through the many outflow holes 2 and 22 provided in the section and returns to the first chamber by that amount.
Thus, the flow of sewage is repeated between the first chamber in the inner vertical cylinder 1 and the second chamber in the outer vertical cylinder 5.

  Although the influence of the stirring in the first chamber is slightly received through the outflow holes 2 and 22, since it is partitioned by the wall surface of the inner vertical cylinder 1, the second chamber in the outer vertical cylinder 5 Little stirring is done. For this reason, in the second chamber, the sewage is slightly rested, and the heavy sludge is deposited on the bottom toward the outflow holes 2 and 22 at the bottom.

  At this time, the state of the mortar-like portion in the lower part of the second chamber in the outer vertical cylinder 5 is that a soft and lightweight sediment layer that is deposited is generated, and the inflowing sewage flows from the lower side of the soft and lightweight sediment layer. It passes through the sediment layer and flows out to the upper side. At this time, the soft and lightweight sediment layer slightly floats and sinks due to the pressure of the sewage flowing out, and rises and falls as it is or in a ruptured state with the sewage spouting out from the surface layer. Repeat.

Then, the turbid substance in the sewage is taken in and processed in the soft and light sediment layer, and the sewage on the soft and light sediment layer flowing out of the sewage becomes sewage with increased transparency.
Even if the sewage has increased transparency, the BOD value is still high. Further, the rise in the water level in the second chamber is next to the second chamber through the water pipes 10 and 20 from the sewage outlets 6 and 26. The sewage treatment tank 9 is introduced.

When the sewage treatment tank 9 further reduces the BOD value of the sewage until the sewage regulation value is cleared, the sewage treatment tank 9 discharges the water to a river.
In addition, there is some solid floating in the sewage in the sewage treatment tank 9, and when it floats on the surface of the sewage, there is a possibility that the solids adhere to each other and form a film. The sewage upper layer is constantly stirred by the stirring flow of K to disperse the solids and suppress surface scum.
In addition, oxygen is supplied to the aerobic microorganisms that inhabit the microorganism carrier 11 by continuous air injection, and the decomposition of the sludge is immediately promoted.

Moreover, as shown in each figure, it is preferable to make the sewage outlets 6 and 26 lower than the sewage inlets 2 and 24 from the viewpoint of creating a gradual flow of sewage.
In addition, the dashed-dotted line in each figure shows the water level of sewage.
As the sewage treatment tank 9, an existing combined septic tank in which a fixed microbial carrier 11 is installed can be used as it is.
Further, in order to further increase the processing capability, a plurality of subsequent units N can be connected in series according to the processing scale.

  Then, by connecting the bypass water pipe 30 from the position above the sewage inlet 6 of the inner vertical cylinder 1 to the water pipe 10 higher than the sewage discharge port 39 of the sewage treatment tank 9, Since the sewage accumulated in the vertical cylinder 1 can be discharged to the sewage treatment tank 9 through the bypass water supply pipe 30, sludge is settled in the outer vertical cylinder 5 thereby causing the flow of sewage. Even if the sewage that flows into the outer vertical cylinder 5 does not flow from the bottom in the inner vertical cylinder 1 and stays in the upper part in the inner vertical cylinder 1, Can be prevented from overflowing, and aeration can be continued.

  Further, by providing a sludge extraction / inspection port 32 at the upper part of the outer vertical cylinder 5, the inside of the outer vertical cylinder 5 can be inspected, and the sludge suction pipe 34 is inserted to the bottom 5 b of the outer vertical cylinders 5, 25. As a result, the sludge in which the sludge has deeply settled on the bottom in the outer vertical cylinder 5 is drawn out, the flow of the sewage can be recovered normally, and the sewage treatment function can be recovered and maintained normally.

  The present invention can also be used by incorporating this apparatus in the field of sewage treatment for purifying sewage such as manure discharged from domestic flush toilets and livestock facilities, and in public sewage facilities for terminal treatment. it can.

The perspective view of the sewage treatment apparatus of a single unit. The perspective view of the sewage treatment apparatus of the form which provided the filtration apparatus. The perspective view of the sewage treatment apparatus of the form using a plurality of units. The perspective view of the sewage treatment apparatus of the form using a microorganism carrier. The vertical side view of the sewage treatment apparatus which shows the form of an integrated multiple connection unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner vertical cylinder 1a Upper end part of inner cylinder 1b Lower peripheral wall surface of inner cylinder 1c Bottom part of inner cylinder 2 Outflow hole 3 Original sewage pipe 4 Sewage inlet 5 Outer vertical cylinder 5a Upper end part of outer cylinder 5b Lower end part of outer cylinder 6 Sewage outlet 7 Blower 8 Air supply pipe 8a Air inlet of air supply pipe 9 Sewage treatment tank 10 Water supply pipe 11 Microbial carrier 12 Air supply pipe 12a Air supply pipe opening 20 Water supply pipe 21 Inner cylinder 21a Upper end 21b Lower peripheral wall surface 21c Inner cylinder Bottom portion 22 Outflow hole 23 Water supply pipe 24 Sewage inlet 25 Outer cylinder 25a Upper end 25b Lower end 26 Sewage outlet 27 Blower 28 Air supply pipe 28a Air supply pipe air inlet 30 Bypass water supply pipe 31 Bypass water supply pipe 32 Sludge extraction and inspection Port 33 Pump 34 Sludge suction pipe 35 Return pipe 36 Pump 37 Aeration chamber 38 Carrier chamber 39 Drain port 40 Water supply pipe 41 Filtration device 42 Filtration means 43 Return port 45 microbial carrier 46 water tube 44 net bag U first unit N subsequent unit

Claims (7)

An inner vertical cylinder having an upper end and a bottom that are open and having a number of outflow holes in the lower peripheral wall surface, and a sewage inlet connected to the raw sewage pipe near the upper end, and an upper end that surrounds the inner vertical cylinder Is closed at the side wall surface portion of the lower opening of the inner vertical cylinder, the lower end is closed in a bowl shape, and the upper vertical end of the inner vertical cylinder is provided with an outer vertical cylinder provided with a sewage outlet opening to the outside near the upper end. A unit consisting of an air supply pipe with a blower inserted near the bottom from the sewage treatment tank is installed next to the sewage treatment tank, and a microbial carrier is buried in the middle layer in the sewage treatment tank, and the air supply pipe with a blower is placed in the sewage treatment process. Provided so as to open in a lower layer in the tank, provided a sewage discharge port of the sewage treatment tank at a position lower than the sewage outlet of the outer vertical cylinder, and positioned higher than the sewage discharge port in the sewage treatment tank A sewage treatment apparatus in which a water pipe that opens to the sewage outlet is connected to the sewage outlet,
By connecting a bypass water pipe from the position above the sewage inflow port of the inner vertical cylinder to the water pipe higher than the sewage discharge port of the sewage treatment tank, the sewage accumulated in the inner vertical cylinder A sewage treatment apparatus characterized in that it can flow out to the sewage treatment tank through a bypass water pipe. An inner vertical cylinder having an upper end and a bottom that are open and having a number of outflow holes in the lower peripheral wall surface, and a sewage inlet connected to the raw sewage pipe near the upper end, and an upper end that surrounds the inner vertical cylinder Is closed at the side wall surface portion of the lower opening of the inner vertical cylinder, the lower end is closed in a bowl shape, and the upper vertical end of the inner vertical cylinder is provided with an outer vertical cylinder provided with a sewage outlet that opens to the outside near the upper end. The first unit consisting of an air pipe with a blower inserted near the bottom from the bottom is installed near the sewage treatment tank, and the upper end and the bottom are open and have a large number of outflow holes in the lower peripheral wall, An inner vertical cylinder provided with a sewage inlet connected to a water pipe near the section, an inner vertical cylinder that surrounds the inner vertical cylinder and the upper end is closed at the side wall surface portion of the lower opening of the inner vertical cylinder, and the lower end is in a bowl shape Closed from the upper end of the inner vertical cylinder, and the outer vertical cylinder provided with a sewage outlet that opens to the outside near the upper end A subsequent unit comprising a blower-attached air supply pipe inserted near the section is connected to the sewage treatment tank near the sewage treatment tank, and the sewage outlet of the first unit is connected to the sewage inlet of the subsequent unit via the water supply pipe. A plurality of sewage outlets of the unit or the unit are connected to the sewage inlet of the subsequent unit via a water pipe, respectively, and a microbial carrier is embedded in the middle layer in the sewage treatment tank, and a blower is attached. The air pipe is provided so as to open in a lower layer in the sewage treatment tank, and a sewage discharge port of the sewage treatment tank is provided at a position lower than the sewage outlet of the outer vertical cylinder of the last subsequent unit, A sewage treatment apparatus in which a water pipe that opens at a higher position than the sewage discharge port in the sewage treatment tank is connected to the sewage outlet of the outer vertical cylinder of the last unit,
By connecting a bypass water pipe from the position above the sewage inlet of each inner vertical cylinder to the water pipe higher than the sewage discharge port of the sewage treatment tank, the sewage accumulated in the respective inner vertical cylinders Can be discharged to the sewage treatment tank through the bypass water pipe.   The outer vertical cylinders of each unit are connected and integrated in one tank, or the outer vertical cylinders of each unit and a sewage treatment tank are connected and integrated in one tank. Sewage treatment equipment.   The sewage treatment apparatus according to any one of claims 1 to 3, wherein a sludge extraction / inspection port is provided at an upper portion of the outer vertical cylinder.   The sewage treatment tank is composed of an aeration chamber on the inflow side and a carrier chamber on the outflow side in which the microbial carrier is stored, and the carrier chamber and the raw sewage pipe are connected via a return pipe, and a pump is provided in the return pipe. The sewage treatment apparatus according to at least one of claims 1 to 4, wherein sewage in the carrier chamber can be sent to a raw sewage pipe.   The sewage discharge port of the sewage treatment tank is provided with a filtration device provided with water filtration means through a water pipe, and the treated water can be drained outside through the filtration device. The waste water treatment apparatus as described in at least any one of them. The sewage treatment apparatus according to any one of claims 1 to 6, wherein a microorganism carrier is disposed in a middle water submerged area formed between the outer vertical cylinder and the inner vertical cylinder.

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