JPH10156371A - Sewage treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent increase in the sewage concn. in a treating tank and to prevent lowering of the sewage treating capacity by returning the difficult-to- decompose org. matter or inorg. matter such as salts contained in the sewage remaining in the treating tank to an agitated tank from a return pipe by the sewage supplied to the treating tank. SOLUTION: The night soil discharged from a stool 3 is accumulated in a J-shaped pipe 4 through a connecting pipe 2, and the solid component in the night soil is anaerobically treated therein. The anaerobically treated sewage overflows into an agitated tank 1 as the night soil discharged from the stool 3 is increased. The sewage is agitated in the tank by the air from an aeration pipe 6 and decomposed by the activity of anaerobe and chemical reaction. When the sewage level in the tank 1 is raised above the air blowoff port 17 of a feed pipe 16, a blower 18 is driven, the sewage in the amt. larger than the amt. of the sewage stored in the tank 11 is supplied to the tank 11 to clean the inside of the tank 11, and sewage exceeding the storage amount of the tank 11 is returned into the agitated tank 1 from the opening 20 of a return pipe 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a sewage treatment apparatus for treating sewage.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No.
No. 5100 (C02F 11/02) is known. This sewage treatment device aerates the sewage collected in the stirred tank and gives oxygen to the aerobic bacteria in the sewage, and converts the sewage into carbon dioxide and water by the activity and chemical reaction of the aerobic bacteria in the sewage. Exhaust gas such as carbon dioxide from the exhaust pipe, supply sewage in the stirring tank to a treatment tank having sewage treatment means such as ultrasonic vibration by a sewage supply device, and remove the moisture of the sewage generated in the treatment tank to the atmosphere. It is configured to treat sewage by discharging it inside.

However, the sewage in the stirring tank contains hardly decomposable organic substances and inorganic substances such as salts. If the sewage is continuously treated by the sewage treatment means, the sewage in the treatment tank will be hardly decomposable organic substances and The concentration of inorganic substances such as salts increases, and the sewage treatment capacity decreases.If the concentration is remarkable, inorganic substances such as hard-to-decompose organic substances and salts may accumulate in the sewage treatment means, making it impossible to perform sewage treatment. Was.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a sewage treatment apparatus capable of preventing a decrease in sewage treatment capacity and performing a stable treatment. Make it an issue.

[0005]

A first means for solving the above problems is a stirring tank having an inflow port into which sewage flows, a treatment tank disposed adjacent to the stirring tank, A transfer pipe for supplying sewage in the stirring tank into the processing tank, a heater disposed in the processing tank and vaporizing the sewage stored in the processing tank, and a predetermined amount larger than the amount of sewage stored in the processing tank A wastewater supply device that supplies the wastewater from the stirring tank into the treatment tank via a transfer pipe, and connects the treatment tank and the stirring tank to return the wastewater exceeding the amount of wastewater stored in the treatment tank to the stirring tank. And a return pipe.

[0006] A second means for solving the above problems is as follows.
A stirring tank having an inflow port into which sewage flows, a processing tank disposed adjacent to the stirring tank, a transfer pipe for supplying sewage in the stirring tank into the processing tank, and a transfer pipe disposed in the processing tank. A heater for evaporating sewage stored in the processing tank, an exhaust pipe connected to the processing tank and discharging gas generated in the processing tank, and a predetermined amount larger than the amount of sewage stored in the processing tank. A sewage supply device that supplies sewage from the stirring tank to the treatment tank via a transfer pipe, and a return that communicates the treatment tank with the stirring tank and returns sewage that exceeds the amount of wastewater stored in the treatment tank to the stirring tank. And a tube.

In the first means or the second means,
It is preferable that a discharge port of a transfer pipe provided in the processing tank is provided at a position lower than an opening of the return pipe.

[0008] In the first means or the second means,
It is preferable that a discharge port of a transfer pipe provided in the processing tank is disposed lower than an opening of the return pipe and directed downward.

In the first means or the second means,
It is preferable to drive the sewage supply device every predetermined time.

In the first means or the second means,
It is preferable that a sensor for detecting a decrease in the sewage water level in the treatment tank is provided, and the sewage supply device is driven based on an output of the sensor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail below based on a sewage treatment apparatus shown in FIGS.

1 is a stirring tank buried underground, 2 is a connecting pipe for connecting the stirring tank 1 to the toilet bowl 3, and 4 is a J-shaped pipe disposed in the stirring tank 1 and connecting to the connecting pipe 2. It is. Toilet paper, human waste, and the like discharged from the toilet 3 pass through the connecting pipe 2 and are temporarily stored in the J-shaped pipe 4 to become toilet paper and become sewage mixed with urine. Reference numeral 5 denotes a first lid for closing the stirring tank 1.

Reference numeral 6 denotes a first aeration pipe disposed at the bottom of the stirring tank 1, connected to a first blower 9 via a first supply pipe 7 and a second supply pipe 8, and from inside the J-shaped pipe 4. The sewage overflowing into the stirring tank 1 is aerated, and the first aeration pipe 6,
The first supply pipe 7, the second supply pipe 8, and the first blower 9 constitute a first aeration apparatus.

Reference numeral 10 denotes a first water level detection unit provided in the stirring tank 1 and has a storage upper limit water level slightly lower than the full water level of the sewage in the stirring tank 1 (in this embodiment, a water level that can be used for about seven days after detection). ) Is detected.

Reference numeral 11 denotes a treatment tank buried underground while being mounted on the stirring tank 1. Reference numeral 12 denotes a transfer pipe having one end opened at the bottom of the stirring tank 1, and a discharge port 13 formed at the other end is located in the processing tank 11 at a position lower than an opening 20 of a return pipe 19, which will be described later, and facing downward. Provided.

When the discharge port 13 is viewed from the upper surface of the processing tank 11, a first virtual line 14 passing through an opening 20 of a return pipe 19 and a center of the processing tank 11 and a first virtual line passing through the center of the processing tank 11 will be described later. The position is surrounded by a second imaginary line 15 orthogonal to 14 and does not include the opening 20 of the return pipe 19.

Reference numeral 16 denotes a third supply pipe having an air outlet 17 in the transfer pipe 12, which is connected to a second blower 18, and
The wastewater in the stirring tank 1 is supplied to the treatment tank 11 by aerating the wastewater therein, and the transfer pipe 12, the third supply pipe 16, and the second blower 18 constitute a wastewater supply apparatus. .

Reference numeral 19 denotes a return pipe for connecting the treatment tank 11 and the stirring tank 1 to return the wastewater exceeding the storage amount of the wastewater stored in the processing tank 11 to the stirring tank 1 so as to return to the stirring tank 1. The opening 20 of the return pipe 19 is provided on the side wall of the processing tank 11 corresponding to the position.

Reference numeral 21 denotes a third aeration pipe provided at the bottom of the processing tank 11, which is connected to the first blower 9 via a fourth supply pipe 22 and a second supply pipe 8, The third aeration pipe 21, the fourth supply pipe 22, the second supply pipe 8, and the first blower 9 constitute a second aeration apparatus.

Reference numeral 23 denotes a heater disposed on the third aeration pipe 21 in the processing tank 11 for controlling the sewage in the processing tank 11 to a predetermined temperature, in the present embodiment, within a range of about 55 to 60 degrees Celsius. Is to be maintained. Reference numeral 24 denotes a second water level detection unit disposed in the treatment tank 11, which detects a storage lower limit water level at which the heater 23 disposed in the treatment tank 11 is immersed in sewage.

Reference numeral 25 denotes an exhaust pipe connected to the upper portion of the processing tank 11 and having an exhaust fan 26. The exhaust pipe 25 exhausts water vapor and the like generated in the processing tank 11 and returns a gas and the like generated in the stirring tank 1 to a return pipe 19. Exhaust through. Reference numeral 27 denotes a second lid for closing the processing tank 11.

Reference numeral 28 denotes a control component storage section provided on a wall near the position where the processing tank 11 is buried, and controls the first blower 9, the second blower 18, the heater 23, the exhaust fan 26 and the like. (Not shown) is housed.

The human waste discharged from the toilet bowl 3 together with the toilet paper passes through the connecting pipe 2 and temporarily accumulates in the J-shaped pipe 4, where the solid content in the human waste and the toilet paper are subjected to anaerobic treatment. , It becomes easy to disassemble.

When the amount of human waste discharged from the toilet bowl 3 increases, urine mixed with toilet paper and anaerobically treated sewage overflows from the J-shaped pipe 4 into the stirring tank 1. The sewage collected in the stirring tank 1 and the toilet paper in the easily decomposed state contained in the sewage are stirred by the air supplied from the first aeration pipe 6 by driving the first blower 9 and Decomposed by the activity of aerobic bacteria and chemical reaction. Gas and water vapor such as carbon dioxide generated by the decomposition of the sewage are forcibly exhausted from the exhaust pipe 25 by the exhaust fan 26 via the return pipe 19.

When the level of the sewage in the stirring tank 1 rises and becomes higher than the air outlet 17 of the third supply pipe 16, the control circuit drives the second blower 18, which is driven every predetermined time, for a predetermined time. A predetermined amount of wastewater larger than the amount of wastewater stored in the treatment tank 11 is supplied into the treatment tank 11, the inside of the treatment tank 11 is washed with the wastewater, and the wastewater that exceeds the amount of wastewater stored in the treatment tank 11 is returned. 19
Is returned into the stirring tank 1 through the opening 20 of the tank.

A return pipe 19 connecting the stirring tank 1 and the processing tank 11
Is also used for exhausting gas and returning sewage to simplify the configuration.

When the sewage water level in the treatment tank 11 rises and the second water level detection unit 24 detects that it is equal to or higher than the storage lower limit water level,
After the second blower 18 is stopped, the control circuit energizes the heater 23 to vaporize the sewage supplied into the processing tank 11. further,
The air supplied from the second aeration pipe 21 aerates the sewage to make the sewage liquid surface rippling and increase the surface area of the sewage liquid surface to be vaporized, thereby promoting the evaporation of the sewage. The water vapor generated by the evaporation of the sewage is discharged from the exhaust stack 25 to the exhaust fan.
Exhausted by 26.

When the sewage water level drops due to the evaporation of the sewage water in the treatment tank 11, and the second water level detection unit 24 detects the storage lower limit water level, the control circuit stops energizing the heater 23 and lowers the sewage water level. To prevent

When a predetermined time has elapsed since the supply of the sewage from the stirring tank 1 to the processing tank 11, the control circuit again operates the second blower 18.
Is driven to supply a predetermined amount of sewage from the stirring tank 1 to the treatment tank 11, and after the supply, the heater 23 is energized again to vaporize the sewage.

The above operation is repeated to treat sewage.

In this embodiment, the toilet paper, which is difficult to disassemble, is anaerobically treated in the J-shaped tube 4 to make it easy to disassemble, and the toilet paper is disintegrated in the aerobic state in the stirring tank 1 and treated. 11
This prevents the degradation of the wastewater treatment capacity due to undecomposed toilet paper adhering to the heater 23.

When the sewage is repeatedly vaporized in the treatment tank 11, the concentration of the inorganic substances such as the hardly decomposable organic substances and salts contained in the sewage in the treatment tank 11 increases, and the sewage treatment capacity decreases. In the case of a remarkable amount, there is a problem that inorganic substances such as hardly decomposable organic substances and salts are deposited on the heater 23 so that sewage treatment cannot be performed.However, a predetermined amount of sewage larger than the amount of sewage stored in the treatment tank 11 is stirred. By supplying the inside of the processing tank 11 from the inside, the inorganic substances such as the hardly decomposable organic substances and salts remaining in the processing tank 11 are pushed out by the sewage supplied to the processing tank 11 and returned to the stirring tank 1. Therefore, an increase in the concentration of the sewage in the treatment tank 11 can be suppressed.

Since the discharge port 13 of the transfer pipe 12 is located lower than the opening 20 of the return pipe 19, the processing tank
When the sewage supplied into the tank 11 reaches the amount of sewage stored in the treatment tank 11, the discharge port 13 is located below the sewage liquid level. Therefore, turbulence is generated in the wastewater in the treatment tank 11 by the wastewater supplied from the discharge port 13, and the inorganic substances such as organic substances and salts remaining in the treatment tank 11 are stirred, and the supplied wastewater is stirred. At the same time, the water can be returned to the stirring tank 1 from the opening 20 of the return pipe 19, and the increase in the concentration of wastewater in the processing tank 11 can be efficiently suppressed.

Furthermore, since the discharge port 13 of the transfer pipe 12 is directed downward, turbulent flow circulating toward the bottom of the processing tank 11 is generated by the wastewater supplied from the discharge port 13 facing downward, and Inorganic substances such as hardly decomposable organic substances and salts remaining in the bottom of the tank 11 are sufficiently stirred, and can be returned to the stirring tank 1 through the opening 20 of the return pipe 19 together with the supplied wastewater. An increase in the concentration of sewage in the tank 11 can be reliably suppressed.

In the present embodiment, the interval of supplying sewage from the stirring tank 1 to the processing tank 11 is performed at predetermined intervals as described above, but is not limited to this.
The configuration may be such that the second water level detection unit 24 detects the storage lower limit water level when the sewage water level is lowered due to the evaporation of the sewage water inside.

With this configuration, every time the evaporation of the sewage in the treatment tank 11 is completed, the sewage is supplied from the stirring tank 1 into the treatment tank 11, so that the sewage can be continuously vaporized. ,
Sewage treatment efficiency can be improved.

[0037]

According to the structure of the first aspect of the present invention, the wastewater remaining in the treatment tank is supplied from the return pipe by the sewage that supplies the decomposable organic substances and inorganic substances such as salts to the treatment tank. It is possible to suppress the increase in the concentration of the sewage in the treatment tank by returning the sewage to the agitation tank.

According to the configuration of the second aspect of the present invention, the wastewater which supplies the treatment tank with inorganic substances such as hardly decomposable organic substances and salts contained in the wastewater remaining in the treatment tank via the return pipe is provided. It is possible to control the increase in the concentration of sewage in the treatment tank by returning it from the return pipe to the stirring tank, prevent a decrease in sewage treatment capacity, and return the gas such as carbon dioxide generated in the stirring tank to the return pipe. The return pipe can be shared, and the return pipe can be shared and the configuration can be simplified.

According to the third aspect of the present invention, the inorganic substances such as the hardly decomposable organic substances and the salts contained in the sewage remaining in the treatment tank are agitated by the sewage supplied to the treatment tank and returned together with the sewage. It is possible to efficiently suppress an increase in the concentration of sewage in the treatment tank by returning the wastewater from the pipe to the stirring tank, and to prevent a decrease in sewage treatment capacity.

According to the fourth aspect of the present invention, inorganic substances such as hardly decomposable organic substances and salts remaining in the bottom of the treatment tank are efficiently stirred by the wastewater supplied to the treatment tank and returned together with the wastewater. It is possible to reliably suppress an increase in the concentration of sewage in the treatment tank by returning the wastewater from the pipe to the stirring tank, and to prevent a decrease in sewage treatment capacity.

According to the fifth aspect of the present invention, the wastewater supplied to the treatment tank is supplied from the return pipe by the sewage which supplies the treatment tank with hardly decomposable organic substances and inorganic substances such as salts contained in the sewage remaining in the treatment tank. And it is possible to prevent a decrease in sewage treatment capacity, and to achieve effects such as stable sewage treatment.

According to the sixth aspect of the present invention, the wastewater which is supplied to the treatment tank and which contains inorganic substances such as hardly decomposable organic substances and salts contained in the wastewater remaining in the treatment tank is supplied from the return pipe to the stirring tank. And it is possible to prevent a decrease in sewage treatment capacity and to improve sewage treatment efficiency.

[Brief description of the drawings]

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

FIG. 2 is a top view of the same.

FIG. 3 is an enlarged sectional view of the wastewater supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stirring tank 11 Treatment tank 12 Transfer pipe (sewage supply unit) 13 Discharge port 16 Third supply pipe (sewage supply apparatus) 18 Second blower (sewage supply apparatus) 19 Return pipe 20 Opening 23 Heater

Claims (6)

[Claims] 1. A stirring tank having an inflow port into which sewage flows, a treatment tank disposed adjacent to the stirring tank, a transfer pipe for supplying sewage in the stirring tank into the treatment tank, A heater disposed in the treatment tank and for evaporating sewage stored in the treatment tank, and a predetermined amount of sewage larger than the amount of sewage stored in the treatment tank is supplied from the stirring tank to the treatment tank via the transfer pipe. A wastewater supply device, and a return pipe connecting the treatment tank and the stirring tank to return the wastewater exceeding the amount of wastewater stored in the treatment tank to the stirring tank. 2. A stirring tank having an inflow port into which sewage flows, a treatment tank disposed adjacent to the stirring tank, a transfer pipe for supplying sewage in the stirring tank into the treatment tank, A heater disposed in the processing tank to evaporate sewage stored in the processing tank; an exhaust pipe connected to the processing tank to discharge gas and the like generated in the processing tank; and a storage amount of sewage in the processing tank. A sewage supply device for supplying a larger amount of sewage from the agitation tank to the treatment tank via a transfer pipe, and connecting the treatment tank and the agitation tank to stir the sewage exceeding the amount of sewage storage in the treatment tank; A sewage treatment apparatus, comprising: a return pipe for returning to a tank. 3. The sewage treatment apparatus according to claim 1, wherein an outlet of a transfer pipe provided in the treatment tank is provided at a position lower than an opening of the return pipe. 4. The sewage according to claim 1, wherein the discharge port of the transfer pipe provided in the treatment tank is disposed lower than the opening of the return pipe and directed downward. Processing equipment. 5. The sewage treatment apparatus according to claim 1, wherein the sewage supply apparatus is driven at predetermined time intervals. 6. The sewage according to claim 1, further comprising a sensor for detecting a decrease in the sewage water level in the treatment tank, and driving the sewage supply device based on an output of the sensor. Processing equipment.