JPH08117770A - Sewage treatment apparatus - Google Patents

Abstract

PURPOSE: To stably use a sewage treatment apparatus over a long period of time by making the air blowoff range of a first supply pipe blowing air into the sewage in a stirring tank narrower than that of a second supply pipe blowing air into a treatment tank to accelerate the decomposition of filth. CONSTITUTION: In a stirring tank 1, air is blown into sewage over a narrow range from the air blowoff part of a first supply pipe by the supply of air from a first blower and the sewage in the stirring tank is largely convected to be stirred to accelerate preparatory decomposition. In a treatment tank 10, air is blown into sewage over a wide range from the air blowoff part of a second supply pipe 5 by the supply of air from a second blower 8 to supply oxygen to the whole of the sewage in the treatment tank to activate the activity of aerobic bacteria. Further, a large amt. of oxygen is also supplied from the surface of the sewage by sending air to the surface of the sewage from a blower 13 to further activate the activity of aerobic bacteria to accelerate the decomposition of filth still more.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus for treating human waste and gray water.

[0002]

2. Description of the Related Art As a sewage treatment apparatus for treating purified water without pumping it, for example, Japanese Utility Model Laid-Open No. 1-152798 (C02F 3/00) is known. This sewage treatment system connects an air supply pipe with an air outlet to the sewage collected in the treatment tank with a blower, supplies air into the sewage from the blower, and blows air from the blower cylinder onto the sewage surface. , Agitating sewage and giving oxygen to aerobic bacteria in the sewage, purifying sewage with aerobic bacteria in the sewage and converting it to carbon dioxide and water vapor, and exhausting it from the exhaust stack, eliminating the need for pumping It is composed.

[0003]

However, the conventional one-tank type treatment has a drawback in that the treatment efficiency is poor because the agitation of filth and the decomposition treatment by aerobic bacteria are performed simultaneously in a single tank. For example, when a large number of people gather, the inflow of sewage into the treatment tank may temporarily increase, and in this case, the sewage in the treatment tank is decomposed by aerobic bacteria and the water level of the sewage increases. Before it drops, the water level rises due to the inflow of sewage, and as the sewage water level rises, the activity of aerobic bacteria due to the air supply from the blower decreases, further reducing the efficiency of sewage treatment, If this condition continues, the inside of the processing tank will be full of dirty water, which needs to be pumped out.

The present invention has been made to solve the above problems, and an object thereof is to provide a sewage treatment apparatus which can be stably used for a long period of time.

[0005]

A first means for solving the above problems is a stirring tank having an inlet for inflowing sewage, and an air blowing outlet for sewage in the stirring tank.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, The first supply pipe is provided with an exhaust pipe for exhausting gas or the like generated from the sewage in each tank, and a blast cylinder having an air blower with an opening facing the sewage surface in the treatment tank and blowing air to the sewage surface. Second range of air blowout
It is characterized in that it is narrower than the range of the air blown out from the supply pipe.

A second means for solving the above problems is
An agitation tank having an inflow port for inflowing sewage, a first supply pipe having an air outlet in the sewage in the agitation tub, and a first blower for supplying air into the sewage via the first supply pipe. A treatment tank connected to the stirring tank by a sewage outflow pipe for overflowing the sewage water preliminarily stirred in the stirring tank; a second supply pipe having an air outlet in the sewage water in the processing tank; A second blower for supplying air into the wastewater through a supply pipe, an exhaust pipe connected to the agitation tank and the treatment tank and having an exhaust fan for exhausting gas generated from the wastewater in each tank, and the treatment A blower cylinder having an opening facing the surface of the sewage in the tank is provided, and the range of air blowing of the first supply pipe is narrower than the range of air blowing of the second supply pipe.

A third means for solving the above problems is
An agitation tank having an inflow port for inflowing sewage, a first supply pipe having an air outlet in the sewage in the agitation tub, and a first blower for supplying air into the sewage via the first supply pipe. A treatment tank connected to the stirring tank by a sewage outflow pipe for overflowing the sewage water preliminarily stirred in the stirring tank; a second supply pipe having an air outlet in the sewage water in the processing tank; A second blower for supplying air into the wastewater through a supply pipe, an exhaust pipe connected to the agitation tank and the treatment tank to exhaust gas generated from the wastewater in each tank, and the wastewater in the treatment tank. An air blower having an air blower that blows air to the surface of the dirty water, the opening facing the surface, and the air blowing pressure of the first supply pipe is higher than the air blowing pressure of the second supply pipe.

A fourth means for solving the above-mentioned problems is as follows.
An agitation tank having an inflow port for inflowing sewage, a first supply pipe having an air outlet in the sewage in the agitation tub, and a first blower for supplying air into the sewage via the first supply pipe. A treatment tank connected to the stirring tank by a sewage outflow pipe for overflowing the sewage water preliminarily stirred in the stirring tank; a second supply pipe having an air outlet in the sewage water in the processing tank; A second blower for supplying air into the wastewater through a supply pipe, an exhaust pipe connected to the agitation tank and the treatment tank and having an exhaust fan for exhausting gas generated from the wastewater in each tank, and the treatment A blower cylinder having an opening facing the surface of the sewage in the tank is provided, and the air blowing pressure of the first supply pipe is set higher than the air blowing pressure of the second supply pipe.

The fifth means for solving the above-mentioned problems is as follows.
An agitation tank having an inflow port for inflowing sewage, a first supply pipe having an air outlet in the sewage in the agitation tub, and a first blower for supplying air into the sewage via the first supply pipe. A treatment tank connected to the stirring tank by a sewage outflow pipe for overflowing the sewage water preliminarily stirred in the stirring tank; a second supply pipe having an air outlet in the sewage water in the processing tank; A second blower for supplying air into the wastewater through a supply pipe, an exhaust pipe connected to the agitation tank and the treatment tank to exhaust gas generated from the wastewater in each tank, and the wastewater in the treatment tank. An air blower having an air blower for blowing air to the surface of the wastewater, the air blowout port of the first supply pipe is formed toward the upper surface, and the air blowout port of the second supply pipe is the lower surface. That we formed towards And butterflies.

A sixth means for solving the above problems is as follows.
An agitation tank having an inflow port for inflowing sewage, a first supply pipe having an air outlet in the sewage in the agitation tub, and a first blower for supplying air into the sewage via the first supply pipe. A treatment tank connected to the stirring tank by a sewage outflow pipe for overflowing the sewage water preliminarily stirred in the stirring tank; a second supply pipe having an air outlet in the sewage water in the processing tank; A second blower for supplying air into the wastewater through a supply pipe, an exhaust pipe connected to the agitation tank and the treatment tank and having an exhaust fan for exhausting gas generated from the wastewater in each tank, and the treatment A blower cylinder having an opening facing the surface of the sewage in the tank is provided, the air outlet of the first supply pipe is formed in the upper surface direction, and the air outlet of the second supply pipe is formed in the lower surface direction. It is characterized by

[0011]

According to the structure of the present invention, the sewage collected in the stirring tank is agitated by blowing air into the sewage from the air blowing portion of the first supply pipe by the air supply from the first blower. At the same time, oxygen is supplied to pre-decompose waste by the activity of aerobic bacteria, and carbon dioxide and water vapor generated by the decomposition are exhausted from the exhaust stack. Since the agitation tank stores up to the height of the sewage outflow pipe, the sewage supplied to the agitation tank is sufficiently preliminarily decomposed before it overflows into the treatment tank.

When the water level of the sewage reaches the height of the sewage outflow pipe, it overflows and flows into the processing tank. The inflowing sewage is supplied with air from the second blower to blow air into the sewage from the air blowing portion of the second supply pipe to stir the sewage in the treatment tank and supply oxygen to supply aerobic bacteria. The carbon dioxide and water vapor generated by decomposing the filth due to the activity of the are discharged from the exhaust stack.

Further, by blowing air from the air blower to the surface of the sewage, carbon dioxide generated by decomposition of the sewage and floating on the surface of the sewage and bubbles generated by the supply of air from the second supply pipe cause the surface of the sewage to be removed. By being covered, it prevents oxygen deficiency and death of aerobic bacteria.It also supplies a large amount of oxygen from the surface of sewage to further activate aerobic bacteria and further promote the decomposition of sewage. Let

As a result, the waste is completely decomposed, and the generated carbon dioxide is exhausted from the exhaust stack together with the water vapor to prevent the aerobic bacteria from being killed. In this way, the waste in the processing tank is decomposed and further vaporized to reduce the amount.

According to the structure of claim 1, in the stirring tank, the air is blown out from the air blowing portion of the first supply pipe into the narrow range of the dirty water by the air supply from the first blower, so that the dirty water in the stirring tank is discharged. Are largely convected to stir and promote preliminary decomposition.

In the treatment tank, oxygen is supplied to the entire wastewater in the treatment tank by blowing air from the air blowing portion of the second supply pipe into a wide range of the wastewater by supplying air from the second blower. Activates the activity of aerobic bacteria. Further, by blowing air from the blower to the sewage surface, a large amount of oxygen is also supplied from the sewage surface to further activate the activity of aerobic bacteria and further promote the decomposition of sewage.

According to the second aspect of the present invention, in the agitation tank, the sewage water in the agitation tank is blown out from the air blowing section of the first supply pipe by the air supply from the first blower to a narrow range of the sewage water. Are largely convected to stir and promote preliminary decomposition.

In the treatment tank, oxygen is supplied to the entire wastewater in the treatment tank by blowing air from the air blowing portion of the second supply pipe into a wide range of the wastewater by supplying air from the second blower. Activates the activity of aerobic bacteria. Furthermore, as the exhaust fan forcedly exhausts gas such as carbon dioxide generated in the treatment tank, air flows into the sewage surface from the blower tube, thereby supplying a large amount of oxygen from the sewage surface. It further activates the activity of aerobic bacteria and further promotes the decomposition of waste.

According to the third aspect of the invention, in the stirring tank, the air is blown into the dirty water from the air blowing portion of the first supply pipe at a high pressure by the air supply from the first blower, so that the dirty water in the stirring tank is discharged. Are largely convected to stir and promote preliminary decomposition.

Further, in the treatment tank, air is blown into the wastewater from the air blowing portion of the second supply pipe at a pressure lower than that of the first supply pipe by the air supply from the second blower, so that the wastewater is treated without being scattered. Oxygen is supplied to the entire wastewater in the tank to activate the activity of aerobic bacteria. Further, by blowing air from the blower to the sewage surface, a large amount of oxygen is also supplied from the sewage surface to further activate the activity of aerobic bacteria and further promote the decomposition of sewage.

According to the structure of claim 4, in the stirring tank, the air is blown into the dirty water from the air blowing portion of the first supply pipe at a high pressure by the air supply from the first blower, whereby the dirty water in the stirring tank is discharged. Are largely convected to stir and promote preliminary decomposition.

Further, in the treatment tank, air is blown into the wastewater from the air blowing portion of the second supply pipe at a pressure lower than that of the first supply pipe by the air supply from the second blower, so that the wastewater is treated without being scattered. Oxygen is supplied to the entire wastewater in the tank to activate the activity of aerobic bacteria. Furthermore, as the exhaust fan forcedly exhausts gas such as carbon dioxide generated in the treatment tank, air flows into the sewage surface from the blower tube, thereby supplying a large amount of oxygen from the sewage surface. It further activates the activity of aerobic bacteria and further promotes the decomposition of waste.

According to the fifth aspect of the present invention, in the stirring tank, the sewage water in the stirring tank is blown by the air supplied from the first blower toward the upper surface of the sewage water from the air blowing portion of the first supply pipe. Are largely convected to stir and promote preliminary decomposition.

In the treatment tank, air is blown from the second blower toward the lower surface of the wastewater by the air supply from the second blower, so that the entire wastewater in the treatment tank is not scattered. Oxygen is supplied to activate the activity of aerobic bacteria. Further, by blowing air from the blower to the sewage surface, a large amount of oxygen is also supplied from the sewage surface to further activate the activity of aerobic bacteria and further promote the decomposition of sewage.

According to the structure of claim 6, in the stirring tank, the sewage water in the stirring tank is blown by the air supplied from the first blower from the air blowing portion of the first supply pipe toward the upper surface of the sewage water. Are largely convected to stir and promote preliminary decomposition.

In the treatment tank, air is blown out from the air blowing portion of the second supply pipe by the air supply from the second blower toward the lower surface of the wastewater, so that the entire wastewater in the treatment tank is not scattered. Oxygen is supplied to activate the activity of aerobic bacteria. Furthermore, as the exhaust fan forcedly exhausts gas such as carbon dioxide generated in the treatment tank, air flows into the sewage surface from the blower tube, thereby supplying a large amount of oxygen from the sewage surface. Further increase the activity of aerobic bacteria,
To further improve the decomposition of filth.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below in detail based on the human waste processing apparatus shown in FIGS.

1 is a stirring tank which is buried in the ground except for the top, 2 is a connecting pipe for connecting the stirring tank 1 to a toilet (not shown), and 3 is the connecting pipe provided in the stirring tank 1. In the J-shaped pipe connected to 2, the discharged toilet paper and human waste are temporarily stored there through the connecting pipe 2. Reference numeral 4 denotes an intake port having an opening in the stirring tank 1 and the atmosphere, and 5 is a first air supply pipe arranged in the stirring tank 1, and an air outlet is directed toward an upper surface of the stirring tank 1. The formed first supply pipe 6 is located at the bottom of the stirring tank 1.

The range of air blowout from the first supply pipe 6 is narrower than the range of air blowout from the second supply pipe 15 described later. The air outlet of the first supply pipe 6 has a smaller diameter than the air outlet of the second supply pipe 15 described later. Reference numeral 7 is a first blower which is connected to the first air supply pipe and supplies air, and has a larger air supply amount than a second blower 8 described later. Reference numeral 9 is a first exhaust port connected to the stirring tank 1.

Reference numeral 10 denotes a processing tank which is buried in the ground except for the top, which is covered with a heat insulating material (not shown), and the stirring tank 1 and the processing tank 10 are connected by a waste water outflow pipe 11. 12 is a blower tube whose opening is opposed to the surface of human waste in the treatment tank 10, 13 is a blower installed in the blower tube 12, 14 is a second air supply pipe arranged in the treatment tank 10, The second supply pipe 15 whose air outlet is formed toward the lower surface of the processing tank 10 is located at the inner bottom of the processing tank 10.

Reference numeral 8 is a second blower which is connected to the second air supply pipe 14 and supplies air. The first blower 7 and the second blower 8 are arranged above the processing tank 10, and the first blower 7 and the second blower 8 are provided. By arranging electric components such as the blower 8, the blower 13, the heater 16 and the exhaust fan 17 which will be described later in close proximity, maintenance can be easily performed.

Reference numeral 16 is a heater provided on the second supply pipe 15 to prevent the bottom of the treatment tank 10 from directly contacting the bottom of the treatment tank 10 and abnormally heating the bottom, and 18 is connected to the treatment tank 10. The second exhaust port 19 provided is a water level detection unit in the treatment tank 10 for detecting the lower limit storage position and the upper storage limit position of human waste in the treatment tank 10. Two
Reference numeral 0 denotes an exhaust pipe that connects the first exhaust port 9 and the second exhaust port 18 and is erected in the atmosphere, and has an exhaust fan 17, and the exhaust fan 17 includes the first blower 7, the second blower 7, and the second blower 7. The blower 8 and the blower 13 are set to have an exhaust volume larger than the total blown volume.

Next, the electric circuit of this embodiment will be described with reference to FIG. Reference numeral 21 is a control circuit for inputting the outputs from the water level detector 19 and the heater temperature detector 22.
Blower 7, second blower 8, blower 13, heater 1
6, the exhaust fan 17 and the alarm device 23 are controlled. The alarm device 23 is composed of a buzzer, an indicator arranged in a toilet, and the like, and issues an alarm when the water level detector 19 detects the upper limit storage position.

The discharged human waste passes through the connecting pipe 2 and is temporarily accumulated in the J-shaped pipe 3, where the urine is mixed as toilet paper, and when the amount of human waste is increased, it is mixed from the J-shaped pipe 3 into the stirring tank 1. It fits and urine overflows. The human waste collected in the stirring tank 1 is stirred by the air supply from the first blower 7 connected to the first air supply pipe 5, oxygen is supplied,
The carbon dioxide and water vapor generated by preliminarily decomposing filth due to the activity of aerobic bacteria are forcedly exhausted from the first exhaust port 9 by the exhaust fan 17. Along with this, the intake port 4
From the air flows into the stirring tank 1.

Since the agitation tank 1 stores the wastewater up to the height of the sewage outflow pipe 11 provided on the side wall of the agitation tank 1, the human waste collected in the agitation tank 1 is preliminarily decomposed before it overflows into the treatment tank 10. . Further, since the first blower 7 having a larger air supply amount blows the air having a high blowing pressure in the upper surface direction from the air blowing portion of the first supply pipe 6 having a small air blowing port in a narrow range, the convection of night soil. Is increased, and stirring and pre-decomposition of night soil and toilet paper are promoted. Sewage outflow pipe 1 for human waste that has been sufficiently pre-decomposed
When it reaches the height of 1, it overflows and flows into the processing tank 10.

The human waste that has flowed into the treatment tank 10 is agitated by the air supply from the second blower 8 connected to the second air supply pipe 14, oxygen is supplied, and the waste is completely removed by the activity of aerobic bacteria. Disassemble and process. In order to improve the treatment efficiency in the treatment tank 10, the second blower 8 having a reduced air supply amount supplies air having a low blowout pressure from a wide range of air blowout portions of the second supply pipe 15 having a large air blowout port. Since it blows out toward the lower surface, oxygen efficiently dissolves in the whole human waste, activating the activity of aerobic bacteria and promoting the decomposition of waste.

Since the water depth of night soil in the treatment tank is always shallow, the amount of air supplied from the second blower 8 is increased as in the case of the first blower 7, or the air outlet of the second supply pipe 15 is made small so that the blowing range is small. If the airflow is made narrower and the blowing direction is set to the upper surface direction, before the decomposition of filth by aerobic bacteria is finished, air is blown out from the second supply pipe 15 to form a mist on the human urine surface, which is scattered into the air and evaporated. Since the undecomposed filth dries and adheres to the bottom of the tank, the amount of air supplied to the second blower 8 and the second supply pipe 15
The size, the blowing range, and the blowing direction of the air blowing port are as described above.

Further, the pre-decomposed human waste is the water level detection unit 19
When the water level reaches the lower limit water level, the heater 16 is controlled to maintain the urine in the treatment tank 10 at the optimum temperature for the activity of aerobic bacteria, and the output from the water level detection unit 19 of the treatment tank 10 is input to the control circuit 21. By controlling the blower 13 to blow air onto the urine surface, carbon dioxide generated by the decomposition of filth and a large amount of carbon dioxide floating on the surface of human urine and bubbles generated by the supply of air from the second supply pipe 15 cause the human urine surface to By being covered, it prevents oxygen-deficient aerobic bacteria from dying, and supplies a large amount of oxygen from the surface of the sewage to further activate the aerobic bacteria.
To further improve the decomposition of filth. As a result, the filth is completely decomposed, and the generated carbon dioxide is forcibly discharged from the exhaust pipe 20 through the second exhaust port 18 by the exhaust fan 17 together with the steam to prevent the aerobic bacteria from being killed.

In the case of a small family or during a long trip, the inflow of the pre-decomposed human waste into the treatment tank 10 may be temporarily stopped. In such a case, the water level detection unit in the treatment tank 10 19 detects the storage lower limit position, the power of the blower 13 is cut off by the control of the control circuit 21 to prevent the lowering of the water level of the human waste, and when the temperature detection unit 22 of the heater 16 is exposed from dirty water, the heater 16 The heat of the heater 16 is directly sensed and the power of the heater 16 is cut off by the control of the control circuit 21 to prevent abnormal heating. In this way, the blower 13 and the heater 16 are controlled in accordance with the water level of the night soil to suppress the evaporation of night soil in the treatment tank 10 and prevent undecomposed filth from sticking and accumulating at the bottom of the tank. It can be used stably for a long period of time. Further, even when the water level of the night soil is below the storage lower limit position, the supply of air from the second blower 8 maintains the activity of aerobic bacteria and continues the decomposition.

FIG. 4 shows a second embodiment of the present invention, in which the blower fan 13 described in the first embodiment is omitted and the blower tube is placed closer to the urine surface.

In this structure, the human waste sufficiently preliminarily decomposed in the stirring tank 1 flows into the treatment tank 10, is stirred by the air supply from the second blower 8, and is decomposed by the activity of aerobic bacteria. The exhaust fan 17 controlled by inputting the output from the water level detector 19 of the treatment tank 10 to the control circuit,
Gas such as carbon dioxide generated in the processing tank 10 is forcedly exhausted. Along with this, the air flows from the blower tube 12 toward the surface of the night soil, and is generated by the carbon dioxide generated on the surface of the night soil, which is generated by the decomposition of the waste, and the air supplied from the second supply pipe 15. By covering the human urine surface with bubbles, it prevents the aerobic bacteria from dying due to an oxygen deficiency state, and also supplies a large amount of oxygen from the human urine surface to further activate the activity of the aerobic bacteria,
To further improve the decomposition of filth. In this way, the processing tank 10
The filth inside is decomposed and further vaporized to reduce the amount.

[0042]

[Effect] As described above, the sewage treatment apparatus of the present invention is capable of sufficiently preliminarily stirring in the stirring tank, efficiently decomposing the waste in the processing tank, further vaporizing it, and reducing the volume, without the need for pumping. It has an effect that it can be used stably over a period of time.

[Brief description of drawings]

FIG. 1 is a side sectional view of a first embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is the same electric circuit diagram.

FIG. 4 is a side sectional view of a second embodiment of the present invention.

[Explanation of symbols]

 1 Stirring tank 2 Connection pipe 6 1st supply pipe 7 1st blower 8 2nd blower 10 Treatment tank 11 Sewage outflow pipe 12 Blower cylinder 13 Blower 15 Second supply pipe 20 Exhaust pipe

Front Page Continuation (72) Inventor Takehiko Takimoto 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (6)

[Claims] 1. A first tank having an agitation tank having an inflow port for inflowing sewage, and an air blowing port into the sewage water in the agitation tank.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, The first supply pipe is provided with an exhaust pipe for exhausting gas or the like generated from the sewage in each tank, and a blast cylinder having an air blower with an opening facing the sewage surface in the treatment tank and blowing air to the sewage surface. Second range of air blowout
A sewage treatment device characterized in that it is narrower than the range of the air blowing of the supply pipe. 2. A stirrer tank having an inflow port for inflowing sewage, and a first stirrer having an air outlet in the sewage water in the stirring tank.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, An exhaust pipe having an exhaust fan that exhausts gas and the like generated from waste water in each tank, and a blower cylinder having an opening facing the surface of the waste water in the treatment tank are provided, and the range of air blowout of the first supply pipe is set. The sewage treatment apparatus is characterized in that it is narrower than the range of air blowing from the second supply pipe. 3. A stirrer tank having an inflow port for inflowing sewage, and a first stirrer having an air outlet in the sewage water in the stirring tank.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, The first supply pipe is provided with an exhaust pipe for exhausting gas or the like generated from the sewage in each tank, and a blast cylinder having an air blower with an opening facing the sewage surface in the treatment tank and blowing air to the sewage surface. The sewage treatment apparatus is characterized in that the air blowing pressure of the above is made higher than the air blowing pressure of the second supply pipe. 4. A stirrer tank having an inflow port for inflowing sewage, and a first stirrer having an air outlet in the sewage water in the stirring tank.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, An exhaust pipe having an exhaust fan for exhausting gas generated from the sewage in each tank and a blower tube having an opening facing the sewage surface in the treatment tank are provided, and the air blowing pressure of the first supply pipe is 2 A sewage treatment device characterized in that the pressure is higher than the air blowing pressure of the supply pipe. 5. A first stirrer having an inflow port for inflowing sewage, and an air outlet for sewage in the stirrer.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, The first supply pipe is provided with an exhaust pipe for exhausting gas or the like generated from the sewage in each tank, and a blast cylinder having an air blower with an opening facing the sewage surface in the treatment tank and blowing air to the sewage surface. Is formed in the upper surface direction, and the air outlet of the second supply pipe is formed in the lower surface direction. 6. A first stirrer having an inlet for inflowing sewage and an air outlet for sewage in the stirrer.
A supply pipe, a first blower for supplying air into the wastewater through the first supply pipe, and a treatment tank connected to the stirring tank by a wastewater outflow pipe for overflowing the wastewater pre-stirred in the stirring tank A second supply pipe having an air outlet in the wastewater in the treatment tank, a second blower supplying air into the wastewater through the second supply pipe, and connected to the stirring tank and the treatment tank, An exhaust pipe having an exhaust fan for exhausting gas generated from wastewater in each tank, and a blower cylinder having an opening facing the surface of the wastewater in the processing tank are provided, and the air outlet of the first supply pipe is provided on the upper surface. Forming towards the second,
A sewage treatment apparatus characterized in that an air outlet of a supply pipe is formed toward a lower surface.