JPH0763704B2 - Small-scale merger processing septic tank - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-scale combined treatment septic tank for purifying human waste and domestic wastewater discharged from homes by microbial treatment and discharging it as high-quality water.

[0002]

2. Description of the Related Art Two conventional small-scale combined treatment septic tanks for home use are known: a separation contact aeration system and an anaerobic filter bed contact aeration system. The former separation contact aeration method has a structure in which sewage is temporarily stored in a storage unit, and substances with a high specific gravity and light substances are precipitated and separated, and then sewage is sent to a purification treatment tank (purification main treatment unit) with aerobic microorganisms. It is a thing. Also, the latter anaerobic filter bed contact aeration method allows sewage to flow directly into an anaerobic filter bed tank filled with a filter medium, decomposes filth with anaerobic microorganisms, and then purifies sewage with aerobic microorganisms. It has a structure to send it to the processing tank.

[0003]

In this conventional small-scale combined treatment septic tank, the sewage is directly sent to the sedimentation separation tank or the anaerobic filter bed tank without changing the flow rate. On the other hand, kitchen water, water in the bathtub, and washing water also flow into the small-scale combined treatment septic tank as sewage. Therefore, the amount of sewage increases in the morning and evening hours, and a large amount of sewage temporarily flows into the purification main treatment unit / microorganism treatment tank, which exceeds its treatment capacity and impedes the microbial purification function. As a result, sewage is discharged without sufficient purification, and the quality of the discharged water is poor, resulting in an unstable condition. Also, close to this
As a dirty sewage treatment tank, with coarse and fine vertical screens
Screen tank for separating filth, flow rate adjusting tank, decomposition tank, sedimentation tank
Sewage that has a settling tank and has passed through the screen in the flow rate adjustment tank
A structure that pumps water to a water tank with a pump
No. 50-52757. In addition, JP-A-6
No. 4-7993 discloses that waste water is intermittently placed in a contact aeration tank.
Disclosed is a fixed quantity supply device that can supply a fixed quantity at a time.
Has been. However, Kokaikai Sho 50-52757
In the news one, the screen is apt to be clogged.
It takes time and effort to clear the clogging, and
Hair and the like flow into the adjustment tank due to the vertical eyes, and
It is easy to get wrapped around the root car and cause a failure.
Dung lumps like dirt accumulated in the lean tank, its removal work industry
It takes time and effort. Furthermore, JP-A-64-7
993 flow metering device of anaerobic filtration bed tank intended publication
It is installed at the outlet and sends wastewater only to the contact aeration tank.
Insufficient quantitative supply function and its quantitative supply device
Is installed in the anaerobic filtration bed chamber, the inlet port of the filter bed chamber high
Since it is in a bad position, if the water level in the anaerobic filter bed decreases
You will not be able to supply water. There is a problem.

The problem to be solved by the present invention is to eliminate these conventional problems, remove substances having a large specific gravity, insoluble substances, etc. It is intended to provide a small-scale combined treatment septic tank that can perform treatment and that the discharged water quality is stable and in a good quality state.

[0005]

The structure of the present invention, which has solved the above-mentioned problems, is a screen in which inflowing waste water is inclined inward.
Substances with high specific gravity, insoluble substances and soluble substances
Air into the base end of the screen.
An air diffuser that generates bubbles is provided, and the inner proximal end of the same screen
A scree that opened the bottom surface near the
The screen tank and the screen tank
And the scrubbing tank through the drop hole
Stores substances with high specific gravity and insoluble substances separated in the tank
Sediment sewage tank and soluble material separated by screen tank
The adjustment tank that stores the wastewater of the
A fixed amount water supply device that supplies fixed amount of water to the
And a purification main treatment unit, and the quantitative water supply device
Install an airtight cylinder in the adjustment tank, and check the bottom of the cylinder.
Communicates with the lower part of the adjustment tank through the jack valve, and below the inside of the cylinder.
From the purification section to the purification section
Of the air pump that intermittently sends air to the upper part of the cylinder.
A small-scale merged treatment septic tank with a structure connected with an air pipe .

[0006]

In the present invention, sewage is separated by the screen tank, and substances having a large specific gravity such as sand, hair, rubber products, absorbent cotton and other non-dissolved substances are moved to the settling sewage tank, and finely divided by organic matter. Those that become dissolved pass through the screen and move to the adjustment tank. The soluble substance that has moved into the adjustment tank is temporarily stored here, and is transferred to the main purification unit by the quantitative water supply device. Therefore, since the amount of the soluble sewage sent to the purification main treatment unit is only an amount suitable for the treatment capacity, it can be treated in the optimum state by the purification main treatment unit and is discharged in a stable and high-quality state.

Substances having a large specific gravity such as sand that cannot be treated with microorganisms, hair, rubber products, absorbent cotton, and large lumps of waste that are not suitable for microbial treatment are sent to the adjusting tank in the settling waste tank and the screen tank. There is also no possibility that these will be sent to the purification main processing unit and their processing capacity will not be reduced.

Further , in the quantitative water supply device, pressurized air is intermittently sent from the air supply pipe into the inside of the cylinder to increase the air pressure in the airtight cylinder, push the waste water in the cylinder, and close the check valve by the pressure. , The sewage in the cylinder is sent to the water supply pipe, and the sewage is sent to the next purification main processing unit. The pump stops when the specified amount has been sent. Then, the air pressure in the cylinder decreases,
The place where dirty water in the adjusting tank is near the bottom through the opened check valve.
From flowing into the tubular body. By repeating this intermittently, a fixed amount of continuous water is supplied to the main purification unit. By this
Therefore, there is no rotation mechanism part and there is no clogging,
It is supposed that the wastewater in the preparation tank can be supplied in a fixed amount even at a low water level.
It Furthermore, the screen of the screen tank is inclined inward,
An air diffuser is installed at the base end of the air, and the air bubbles from here.
And bubbles can move along the screen surface.
And move the clogging component of the screen to
Reduces clogging and creates water support in the clean screen tank.
Up and evenly separate the sewage with a screen.
Move to the adjusting tank to remove insoluble substances, sand with large specific gravity, etc.
The material is transferred from the settling waste drop port to the settling waste tank and screened.
I try not to return to the tank.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of the embodiment, FIG. 2 is a sectional view taken along the line AA 'of FIG. 1, FIG. 3 is a sectional view taken along the line BB' of FIG. 1, and FIG. 4 is a line CC 'of FIG. 5 is a sectional view taken along the line D-D 'in FIG. 1, FIG. 6 is an explanatory view showing the quantitative water supply device of the embodiment, and FIG. 7 is an explanatory view showing the flow of waste water of the embodiment.

In the figure, 1 is a sewage inflow pipe, 2 is a screen tank, 3 is a screen, 4 is a settling waste drop port, 5 is an overflow opening, 6 is an air diffuser provided below the screen 3 for ejecting air, 7 Is an advection opening to the adjusting tank 13 of the passage wastewater chamber, 8 is a settling waste tank, 9 is a partition wall between the settling waste tank and the screen tank 2, 10 is a baffle, 11 is an overflow opening, 12 is a specific gravity of sand or the like. Large amount of sedimentation substance, 13 is an adjusting tank, 14 is a partition wall between the adjusting tank and the screen tank 2,
15 is a constant quantity water supply device, 16 is a cylinder, 17 is an inflow pipe,
18 is a check valve, 19 is a water supply pipe, 20 is an air supply pipe, 21 is a flow control valve, 22 is an air release valve, 2
3 is an anaerobic filter bed tank, 24 is a contact aeration tank, 25 is a precipitation tank, 26 is a disinfection discharge tank, and 27 is a discharge pipe.

Here, the storage section of the present invention comprises a screen tank 2, a settling waste tank 8, and an adjusting tank 13. In addition, the purification main processing section includes an anaerobic filter bed tank 23, a contact aeration tank 24,
It is composed of a settling tank 25 and a disinfection and discharge tank 26. Hereinafter, each tank will be described in detail.

Screen tank 2 A fine screen 3 having an opening of 2 mm is installed in the water at the outlet of the screen tank 2, and a diffusing pipe 7 is provided below the screen 3.
The air blown out from the air diffuser 7 lifts up the screen 3 surface to clear the clogging of the filth, and swirls in the screen tub 2 so that the air pressure rising up the screen 3 surface and the flowing water pressure of the inflowing sewage. Due to the balance, only the organic substances (soluble substances) are gradually shredded while coming into contact with the surface of the screen 3 so that they can pass through the screen 3. Further, a sediment settling port 4 is provided at the bottom of the screen tank 2 and the settling settling port Heavy items from 4 (sand, types, other heavy items, etc.)
Is naturally settled in the subsequent settling sewage tank 8. Inorganic substances that cannot be shredded (hair, rubber products, absorbent cotton, etc.) can be easily transferred to the settling waste tank 8 during maintenance and inspection.

Settling sand sewage tank 8 Installed at the bottom of the screen tank 2 to store heavy substances (sand, types, other heavy substances, etc.) and inorganic substances (hair, rubber products, absorbent cotton, etc.) that settle from the screen tank 2. It has a structure that allows it. It is a device for reducing the load on the anaerobic filter bed tank 23 and the contact aeration tank 24 in the subsequent stage, and promoting the purification function of various microorganisms.

Adjustment tank 13: Installed beside the screen tank 2 and the sand settling tank 8 to catch the variable inflowing water amount at the peak of morning and evening, and the anaerobic filter bed tank 23, the contact aeration tank 24 and the sedimentation at the latter stage. A fixed quantity water supply device 15 is provided in the tank as a device for quantitatively transferring to the tank 25, reducing the load on each tank, and promoting the processing function.

Quantitative water supply device 15 is installed in the adjusting tank 13 and is moved from the adjusting tank 13 to the anaerobic filter bed tank 2.
3 is a device for quantitatively feeding water, and is a flow rate fluctuation adjusting device in which an intermittent fixed amount is adjusted by a timer by a pneumatic pressure system using an air pump.

Anaerobic filter bed tank 23. Storms and the like in wastewater shredded with a fine (2 mm) screen are stored in the filter bed, and at the same time, they are stabilized by decomposing organic substances in the presence of anaerobic bacteria. Let The anaerobic filter bed tank 23 is set as one tank because a fixed amount of dirty water is introduced by the fixed quantity water supply device 15 and the flow load is reduced and stabilized, and the honeycomb type contactor is filled in the tank at 60% or more of the effective capacity of the tank. Has been done. Also, the anaerobic filter bed tank 23 and the contact aeration tank 24
At the center of the partition wall, there is an outlet for inserting a vacuum hose in order to pull out sludge that has settled and accumulated at the bottom of the tank.

Contact aeration tank 24 Treated water from the anaerobic filter bed tank 23 enters the contact aeration tank 24 and supplies sufficient dissolved oxygen by aeration stirring to contact with the biofilm adhering to the contactor surface. Then, the organic matter in the wastewater is adsorbed and decomposed. As a result, the BOD removal rate is 90% or more,
The BOD is 20 ppm or less, and the overload in the tank due to the conventional fluctuation of the inflow time is eliminated by the flow rate adjusting tank, and high quality water can be stably obtained. An advection port is provided for naturally transferring partially exfoliated sludge generated with the growth of the biofilm by this reaction operation, and sewage in the tank where nitrification has advanced to the anaerobic filter bed tank 23 in the front stage and the precipitation tank 25 in the rear stage. Has been. The contact aeration tank 24 is filled with 55% or more of the contact material with respect to the effective capacity of the tank, and is provided with an aeration device and a backwash device.

Sedimentation tank 25 The wastewater purified in the contact aeration tank 24 is subjected to sedimentation separation of suspended matter in the water in the sedimentation tank 25, and the supernatant water enters the disinfection tank in the subsequent stage. The structure of the settling tank 25 is a three-sided hopper type of 60 degrees or more at the bottom, and the settling sludge is returned to the anaerobic filter tank at the preceding stage by a returning method with an air lift pump.

Disinfection and discharge tank 26 The supernatant water of the precipitation tank 25 is contacted with a disinfectant to be disinfected before being discharged as treated water. As a result, the discharged water is BOD20.
The total amount of the bacteria is less than ppm and the number of coliform bacteria is less than 3000 / cm2, and they are released. The disinfection discharge tank 26 is structured such that it is installed between the overflow plate of the precipitation tank 25 and the discharge port, and has a medicine cylinder attached thereto.

[0020]

Industrial Applicability As described above, according to the present invention, a screen tank separates sewage into a substance having a large specific gravity, an insoluble substance and a soluble substance, and a fixed amount of water is sent from an adjusting tank that stores the soluble substance. Since only a fixed amount is sent to the purification main treatment unit that performs microbial purification treatment by the device, even if the inflow of sewage changes, the purification main treatment unit will be sent the amount of sewage according to its treatment capacity. Maintains the treatment condition and can stably discharge high-quality wastewater. In addition, cylinders, check valves, water pipes,
By using a fixed quantity water supply device that intermittently supplies a fixed amount of water by an air supply pipe that sends air to the tubular body, it is possible to provide a small-scale combined treatment septic tank that has a small number of drive mechanisms, few failures, and is inexpensive.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA ′ in FIG. 1 of the same embodiment.

FIG. 3 is a sectional view taken along line BB ′ in FIG. 1 of the same embodiment.

FIG. 4 is a sectional view taken along line CC ′ of FIG. 1 of the same embodiment.

FIG. 5 is a sectional view taken along line DD ′ in FIG. 1 of the same embodiment.

FIG. 6 is an explanatory view showing the constant volume water supply device of the embodiment.

FIG. 7 is an explanatory diagram showing a flow of dirty water in the embodiment.

[Explanation of symbols]

 1 Sewage inflow pipe 2 Screen tank 3 Screen 4 Sediment filth drop port 5 Overflow opening 6 Diffuser pipe 7 Advection opening 8 Sediment sewage tank 9 Partition wall 10 Baffle 11 Overflow opening 12 Sedimentation material 13 Adjustment tank 14 Partition wall 15 Quantitative water supply device 16 Tube Body 17 Inflow pipe 18 Check valve 19 Water supply pipe 20 Air supply pipe 21 Flow rate adjustment valve 22 Air release valve 23 Anaerobic filter bed tank 24 Contact aeration tank 25 Precipitation tank 26 Disinfection discharge tank 27 Discharge pipe

Claims (1)

[Claims] 1. A screen in which inflowing wastewater is inclined inward.
Substances with high specific gravity, insoluble substances and soluble substances
Air into the base end of the screen.
An air diffuser that generates bubbles is provided, and the inner proximal end of the same screen
A scree that opened the bottom surface near the
It is provided below the screen tank and the screen tank.
Use the screen tank to communicate with the settling waste port.
Sediment sewage that stores separated heavy substances / insoluble substances
A storage tank and a storage tank for storing the sewage of soluble substances separated by the screen tank.
Purification of wastewater from the preparation tank and the adjustment tank
The apparatus has an apparatus and a main purification section for purification treatment with microorganisms. Moreover, the quantitative water supply apparatus has an airtight cylinder in the adjustment tank.
The lower part of the cylinder is connected to the lower part of the adjusting tank through the check valve.
Communicate or send sewage from the lower part inside the cylinder to the purification main treatment section.
A water supply pipe is installed, and air is intermittently placed above the cylinder.
A small-scale merged treatment septic tank that has a structure in which the air supply pipe of the air pump for sending in is connected .