JPH08117772A - Sewage treatment apparatus - Google Patents

Abstract

PURPOSE: To stably use a sewage treatment apparatus over a long period of time by making the opening part on the side of a treatment tank of a sewage outflow pipe higher than the upper end of the opening part on the side of a stirring tank thereof to prevent the outflow of a malodor to the outside and efficiently decomposing filth in the treatment tank. CONSTITUTION: The opening part on the side of a treatment tank 9 of a sewage outflow pipe 10 is made higher than the upper end of the opening part on the side of a stirring tank 1 of the pipe 10. By this constitution, sewage is accumulated in the sewage outflow pipe 10 and the convection of sewage from the treatment tank 9 to the stirring tank 1 is prevented to allow the air accumulated in the stirring tank 1 to flow backward through a connection pipe 2 not only to prevent a malodor to flow out to the outside but also the supply of sewage insufficient in preparatory decomposition to the treatment tank 9 from the stirring tank 1. By this constitution, the outflow of a malodor to the outside can be prevented and sufficient preparatory decomposition is performed in the stirring tank 1 and filth is efficiently decomposed and evaporated in the treatment tank 9 to be reduced in vol. and a sewage treatment apparatus can stably be used over a long period of time.

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 that the treatment efficiency is poor because the agitation of filth and the decomposition treatment by bacteria are carried out 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 filled with dirty water and it will be necessary to pump it.

In the case of the two-tank type treatment, sewage is agitated by supplying air from the first blower to the sewage in the agitation tank, preliminarily decomposed by the activity of aerobic bacteria, and sufficiently predecomposed. The sewage flows into the treatment tank through the sewage outflow pipe. In the treatment tank, the sewage is agitated by supplying air to the sewage from the second blower, oxygen is supplied, and oxygen is also supplied from the sewage surface by a blower to further activate aerobic bacteria and decompose sewage. Is further enhanced and vaporized to reduce the amount. In addition, the gas generated in each tank is discharged from the exhaust stack.

Usually, since the pressure in the treatment tank is higher than the pressure in the stirring tank due to the air blown from the blower in the treatment tank, convection from the processing tank to the stirring tank occurs, but in the stirring tank, The inflowing air is discharged from the exhaust port of the stirring tank through the exhaust stack. However, when the wind is strong, the exhaust loss becomes large, so the air accumulated in the stirring tank may flow back through the waste water inlet, and the odor in the stirring tank and the processing tank may flow out to the outside.

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

[0007]

In order to solve the above problems, the present invention provides a stirring tank having an inflow port for inflowing sewage, and an air blowing port for sewage water in the stirring tank.
An air supply pipe and a first air supply pipe for supplying air to the first air supply pipe
A blower, a sewage outflow pipe connected to the agitation tank for overflowing the sewage preliminarily stirred, a treatment tub connected to the agitation tub by the sewage outflow pipe, and an air outlet in the sewage in the treatment tub. A second air supply pipe that has, a second blower that supplies air to the second air supply pipe, an exhaust pipe that is connected to the stirring tank and the processing tank, and that exhausts gas generated from waste water in each tank, The sewage surface in the treatment tank is provided with an opening facing the opening, and a blower cylinder having a blower for blowing air to the sewage surface is provided, and the treatment tank side opening of the sewage outflow pipe is made higher than the upper end of the stirring tank side opening. It is characterized by

Further, a stirring tank having an inflow port for inflowing sewage, a first air supply pipe having an air outlet in the sewage in the stirring tank, and a first air supply pipe for supplying air to the first air supply pipe. A blower, a sewage outflow pipe connected to the agitation tank for overflowing the sewage preliminarily stirred, a treatment tub connected to the agitation tub by the sewage outflow pipe, and an air outlet in the sewage in the treatment tub. A second air supply pipe that has, a second blower that supplies air to the second air supply pipe, an exhaust pipe that is connected to the stirring tank and the processing tank, and that exhausts gas generated from waste water in each tank, The opening is opposed to the sewage surface in the treatment tank,
A blower cylinder having a blower for blowing air to the surface of the sewage, wherein the middle part of the sewage outflow pipe is formed in a mountain shape higher than the upper end of the end part on the side of the treatment tank.

[0009]

According to the first aspect of the present invention, the sewage is stirred by the air supply from the first blower connected to the first air supply pipe having the air outlet in the sewage in the stirring tank. , Oxygen is supplied to pre-decompose waste by the activity of aerobic bacteria, and carbon dioxide and water vapor generated thereby are exhausted from the exhaust stack. Since the agitation tank stores the wastewater up to the height of the outflow pipe, it is sufficiently preliminarily decomposed until 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 treatment tank.

The sewage that has flowed into the treatment tank is agitated with the second blower connected to the second air supply pipe having an air outlet in the sewage water in the treatment tank to stir the sewage and to generate oxygen. The carbon dioxide and water vapor that are supplied and decomposed by the activity of aerobic bacteria to decompose the waste, are exhausted from the exhaust stack. Further, by blowing air from the blower to the sewage surface, by covering the sewage surface with bubbles generated by decomposition of the sewage, carbon dioxide floating on the surface of the sewage in large quantities and air generated by supplying air from the second blower, It prevents the aerobic bacteria from dying due to an oxygen deficiency state, and supplies a large amount of oxygen from the surface of the sewage to further activate the aerobic bacteria and further promote the decomposition of the sewage.

As a result, the waste is completely decomposed, and the generated carbon dioxide is exhausted from the exhaust stack together with water vapor in order 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.

Although the pressure in the treatment tank is higher than the pressure in the stirring tank due to the air blown from the blower in the treatment tank, the treatment tank side opening of the sewage outflow pipe is located at the upper end of the stirring tank side opening. By forming it higher, sewage is stored in the sewage outflow pipe, preventing convection from the treatment tank to the stirring tank, and the odor flows back from the inlet of the stirring tank during strong wind and does not go out. In addition, the wastewater that is not sufficiently decomposed is prevented from being supplied to the treatment tank.

According to the second aspect of the present invention, by forming the intermediate portion of the sewage outflow pipe in a mountain shape higher than the upper end of the end portion on the side of the agitation tank, the sewage is accumulated in the sewage outflow pipe, and the agitation tank from the treatment tank To prevent convection from flowing into the stirrer from the inlet of the agitating tank in strong winds and to prevent it from going out.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to a human waste treatment device shown in FIG.

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 openings in the stirring tank 1 and the atmosphere, and 5 is a first air supply pipe arranged in the stirring tank 1, and a first supply pipe 6 having an air blowing port is provided in the stirring tank. It is located at the inner bottom. Reference numeral 7 is a first blower which is connected to the air supply pipe and supplies air, and 8 is a first exhaust port which is connected to the stirring tank 1.

Reference numeral 9 is a processing tank which is buried in the ground except for the top, and is covered with a heat insulating material (not shown). Reference numeral 10 is a sewage outflow pipe for overflowing the pre-stirred sewage, and the processing tank 9 side opening is formed higher than the upper end of the stirring tank 1 side opening to connect the stirring tank 1 and the processing tank 9. . Reference numeral 11 denotes a blower tube having an opening facing the surface of human waste in the treatment tank 9,
12 is a blower installed in the blower tube 11, 13 is a second air supply pipe arranged in the treatment tank 9, and a second supply pipe 14 having an air outlet is located at the bottom of the treatment tank 9. ing. Reference numeral 15 is a second blower that is connected to the second air supply pipe 13 and supplies air. The first blower 7 and the second blower 15 are disposed above the processing tank 9, and the first blower 7, the second blower 15, The electric components such as the blower 12, the heater 16 and the exhaust fan 20 described later are arranged close to each other to facilitate maintenance.

Reference numeral 16 denotes a heater disposed in the processing tank 9, which is located on the second supply pipe 14 in order to prevent the tank bottom from directly contacting with the tank bottom and abnormally heating the tank bottom.
17 is a second exhaust port connected to the processing tank 9;
Is a water level detector in the treatment tank 9 for detecting the lower limit storage position and the upper storage limit position of human waste in the treatment tank 9. An exhaust pipe 19 connects the first exhaust port 8 and the second exhaust port 17 and is erected in the atmosphere.
The exhaust fan 20 has a first blower 7 and a second blower.
The blower 15 and the blower 12 are set to have a larger exhaust volume 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 18 and the heater temperature detector 22.
The blower 7, the second blower 15, the blower 12, the heater 16, the exhaust fan 20, 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 18 detects the storage upper limit position.

The discharged human waste passes through the connecting pipe 2 and is temporarily stored in the J-shaped pipe 3, where the urine is mixed with the toilet paper, and when the amount of human waste increases, the human waste 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 the waste due to the activity of aerobic bacteria are forcedly exhausted from the first exhaust port 8 by the exhaust fan 20. Along with this, the intake port 4
From the air flows into the stirring tank 1. The agitation tank 1 is stored up to the height of a wastewater outflow pipe 10 provided on the side wall of the agitation tank 1, and is sufficiently preliminarily decomposed until it overflows into the treatment tank 9. The pre-decomposed human waste overflows when it reaches the height of the sewage outflow pipe 10 and flows into the treatment tank 9.

The excreted urine flowing into the treatment tank 9 is agitated by the air supply from the second blower 15 connected to the second air supply pipe 13, oxygen is supplied, and the waste is decomposed by the activity of aerobic bacteria. . Further, when the pre-decomposed human waste reaches the storage lower limit water level of the water level detection unit 18, the heater 16 is controlled to maintain the human waste in the treatment tank 9 at the optimum temperature for the activity of aerobic bacteria and detect the water level of the treatment tank 9. The output from the section 18 is input to the control circuit 21, the blower 12 is controlled to blow air on the urine surface, and a large amount of carbon dioxide generated by the decomposition of waste and drifting on the surface of the human waste and the second supply pipe 13 By covering the human urine surface with bubbles generated by the supply of air, the oxygen-deficient state is prevented and the aerobic bacteria are not killed. We will further increase the activity and promote the decomposition of waste. As a result, the filth is completely decomposed, and the generated carbon dioxide is forcibly discharged from the exhaust pipe 19 through the second exhaust port 17 by the exhaust fan 20 together with the steam to prevent the aerobic bacteria from being killed.

The stirring tank 1 and the processing tank 9 are the wastewater outflow pipe 1
Blower 1 in the processing tank 9 connected through 0
Since the pressure in the treatment tank 9 is higher than the pressure in the stirring tank 1 due to the air flow from 2, the convection from the processing tank 9 to the stirring tank 1 occurs. The air flowing into the stirring tank 1 by this convection is exhausted from the first exhaust port 8 by the exhaust fan 20. However, when the wind is strong, the exhaust loss becomes large, and the amount of air exhausted by the exhaust fan 20 and flowing into the stirring tank 1 decreases, so that the air accumulated in the stirring tank 1 flows through the connecting pipe 2. There is a case where the backflow causes the odor in the stirring tank 1 and the processing tank 9 to flow into the toilet.
The opening of the processing tank 9 side of 0 is formed higher than the upper end of the opening of the stirring tank 1 side to collect sewage in the sewage outflow pipe 10 to prevent convection from the processing tank 9 to the stirring tank 1. The odor is prevented from flowing into the toilet in a strong wind, and sewage that has not been sufficiently decomposed is prevented from being supplied to the treatment tank 9.

In the case of a small family or during a long trip, the inflow of the pre-decomposed human waste into the treatment tank 9 may be temporarily stopped. In such a case, the water level detection unit in the treatment tank 9 may be stopped. 18
Detects the storage lower limit position and turns off the power of the blower 12 under the control of the control circuit 21 to prevent the lowering of the water level of human waste, and when the temperature detection unit 22 of the heater 16 is exposed to dirty water, the heater 16 The heat is directly sensed, and the control circuit 21 controls the heater 16 to turn off the power to prevent abnormal heating. In this way, the blower 12 and the heater 16 are controlled according to the water level of the night soil to suppress the evaporation of night soil in the treatment tank 9 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 human waste is below the lower limit of storage, the aerobic bacteria are kept active by the supply of air from the second blower 15, and the decomposition is continued.

A second embodiment of the present invention is shown in FIG. As shown in FIG. 3, even when the opening of the waste water outflow pipe 10 on the side of the treatment tank 9 is higher than the upper end of the opening on the side of the agitation tank 1 and is attached in an inclined manner, the same effect as that of the first embodiment can be obtained.

A third embodiment of the present invention is shown in FIG. As shown in FIG. 4, even when the middle portion of the wastewater outflow pipe 10 is higher than the end portion on the side of the stirring tank 1 and formed in a mountain shape, the same effect as that of the first embodiment can be obtained.

[0026]

[Effect] As described above, the sewage treatment apparatus of the present invention prevents the odor from flowing to the outside, performs sufficient preliminary stirring in the stirring tank, and efficiently decomposes and further vaporizes the waste in the processing tank. The effect is that the amount can be reduced, and it is possible to use it stably for a long period of time without the need for pumping.

[Brief description of drawings]

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

FIG. 2 is the same electric circuit diagram.

FIG. 3 is a side sectional view of a second embodiment of the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stirring tank 5 1st air supply pipe 7 1st blower 9 Processing tank 10 Sewage outflow pipe 11 Blower cylinder 12 Blower 13 2nd air supply pipe 15 2nd blower 19 Exhaust pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takehiko Takimoto 2-5-5 Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd.

Claims (2)

[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.
An air supply pipe and a first air supply pipe for supplying air to the first air supply pipe
A blower, a sewage outflow pipe connected to the agitation tank for overflowing the sewage preliminarily stirred, a treatment tub connected to the agitation tub by the sewage outflow pipe, and an air outlet in the sewage in the treatment tub. A second air supply pipe that has, a second blower that supplies air to the second air supply pipe, an exhaust pipe that is connected to the stirring tank and the processing tank, and that exhausts gas generated from waste water in each tank, The sewage surface in the treatment tank is provided with a blower having an air blower that blows air to the sewage surface, and the sewage outflow pipe has a treatment tank side opening that is higher than an upper end of the stirring tank side opening. A sewage treatment device characterized by the above. 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.
An air supply pipe and a first air supply pipe for supplying air to the first air supply pipe
A blower, a sewage outflow pipe connected to the agitation tank for overflowing the sewage preliminarily stirred, a treatment tub connected to the agitation tub by the sewage outflow pipe, and an air outlet in the sewage in the treatment tub. A second air supply pipe that has, a second blower that supplies air to the second air supply pipe, an exhaust pipe that is connected to the stirring tank and the processing tank, and that exhausts gas generated from waste water in each tank, The sewage surface in the treatment tank is provided with an air blower having an air blower for blowing air onto the sewage surface, and the middle part of the sewage outflow pipe is formed in a mountain shape higher than the upper end of the end part on the side of the stirring tank. A sewage treatment device characterized by the above.