JP3101936B2 - Combined treatment septic tank system using single treatment 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 combined treatment septic tank system using an existing single treatment septic tank.

[0002]

2. Description of the Related Art Septic tanks are generally classified into a "single treatment septic tank" for treating only urine and a "combined treatment septic tank" for treating both human waste and domestic wastewater.

[0003] The Ministry of Construction first established the structural standards for single-stage septic tanks, and then established the structural standards for small-sized merged septic tanks with superior performance through technological development. We are considering switching from an existing single treatment septic tank to a small combined treatment septic tank.

[0004] There are four types of small single treatment septic tanks: putrefaction type, all air type, separated air type, and separated contact air type. Fig. 1 shows an example of the separated contact air type septic tank. .

[0005] The separation contact aeration type single treatment septic tank shown in FIG. 1 is internally divided into two tanks, and the left tank has a sedimentation separation chamber 1.
However, the tank on the right side is provided with an aeration chamber 2 and a sedimentation chamber 3. Separated and aerated types are also divided into two tanks, while rotting and fully aerated types are single tanks.

[0006] The small-sized combined treatment septic tanks are classified into an anaerobic bed contact aeration type as illustrated in FIG. 2 and a separation contact aeration type as illustrated in FIG. 3.

[0007] In the small-sized combined treatment / purification tank of the anaerobic filter contact aeration type illustrated in FIG. 2, the inflowed sewage is first separated into a considerable portion of impurities and suspended matter in the anaerobic filter tanks 4 and 5 provided in two stages. Is removed, flows into the contact aeration tank 6, undergoes aerobic biological treatment by the action of the biofilm on the contact material 7, and is not removed by the contact BOD or the anaerobic filter tanks 4, 5. The BOD from the material is removed. Further, in the sedimentation tank 8, suspended sludge derived from the detached biofilm and the like is settled and separated, and the upstream water is discharged by the disinfection device 9 after chlorine disinfection.

On the other hand, the sludge separated and settled in the settling tank 8 is separated from the settling tank 8 by a communication port (slot) at the bottom.
Since it is a slot type sedimentation tank communicating with the contact aeration tank 6, it is transferred to the contact aeration tank 6 by gravity and further to the anaerobic bed tank 4 by the sludge transfer pipe 10 and stored for a period until cleaning.

The separation / contact and aeration type small-sized combined treatment / purification tank exemplified in FIG. 3 is composed of sedimentation separation tanks 11 and 12, a contact and aeration tank 13, a precipitation tank 14 and a disinfection device 15, and FIG.
The anaerobic bed tanks 4 and 5 of the anaerobic filter contact aeration type exemplified in (1) are replaced with sedimentation separation tanks 11 and 12. That is, the flow of sewage and sludge in the septic tank is anaerobic filter bed tanks 4 and 5 in the small-scale combined treatment septic tank of the anaerobic filter contact aeration system.
Is replaced with the sedimentation separation tanks 11 and 12.

[0010]

At present, it is said that there are about 8 million single treatment septic tanks installed in Japan in Japan. If this is to be switched to a small-scale combined treatment septic tank, there is a problem of land in the case of new construction, and a problem of how to remove the existing single treatment septic tank when replacing it.

Accordingly, the present invention is to propose a new combined treatment septic tank system that effectively utilizes an existing single treatment septic tank without removing or discarding it.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a small-sized combined treatment septic tank made on the ground based on the structural standards established by the Ministry of Construction.
And a monitoring window for the settling sludge is provided at a lower portion of each tank of the small-sized combined treatment septic tank, and the bottom of each tank is configured to discharge the settled sludge to an existing single treatment septic tank via an on-off valve, and The sewage that has flowed into the existing single treatment septic tank is sent to the small combined treatment septic tank through a water basin with a pump,
The overflow sewage of the water dividing basin is returned to the single treatment septic tank, and the discharged water of the small combined treatment septic tank is discharged to the discharge water channel of the single treatment septic tank or a newly installed discharge water channel. It is a combined treatment septic tank system using a single treatment septic tank.

[0013]

The first feature of the present invention is that the existing single treatment septic tank is arranged in front of the small combined treatment septic tank and is effective for an inflow regulating tank when a large amount of sewage enters such as when draining a bathtub. It is a point used.

Secondly, a small-scale combined treatment / purification tank made based on the structural standards established by the Ministry of Construction is installed on the ground. The point is that the treatment is performed via a basin so that the treatment function in the small-sized combined treatment / purification tank is not hindered by the inflowing sewage.

The third point is that a monitoring window is provided at a lower portion for monitoring the settling state of the settling sludge in each tank in the small-sized combined treatment / purification tank so that it is easy to judge when to clean the small-sized combined treatment / purification tank.

Fourthly, a means for discharging settled sludge is provided in each tank of the small-sized combined treatment / purification tank, and it is dropped into the single treatment / treatment tank and pumped from the single treatment / treatment tank by a vacuum car. It is a system devised to improve workability.

[0017]

FIG. 4 shows an embodiment of the present invention. In this case, the existing single treatment septic tank 16 is a two-tank type separate contact aeration type single treatment septic tank, Is a small-sized combined treatment / purification tank of a separation contact aeration type.

The existing single treatment septic tank 16 removes unnecessary devices such as the contact material 7 and the disinfection device 9 provided in the tank on the right side, and removes the sedimentation separation chamber 1 and the small combined treatment septic tank 18. Sewage inlet 18a is connected via a pump 19, a water pump 20 and a water distribution basin (water distribution measuring tank) 21 to form a water distribution basin 2
The overflow pipe 22 connected to 1 is put into the sedimentation separation chamber 1 of the single treatment / purification tank 16.

At the bottom of each tank of the small-sized combined treatment / purification tank 18, discharge pipes 23, 24 and 25 for the settling sludge provided with opening / closing valves V1, V2 and V3, respectively, are provided. The tank in which the chamber 2 and the settling chamber 3 were located is dropped as a sludge storage tank, and the discharge pipes 23, 2
A transparent sludge 23a, 24a, 25a is used for a part of the tubes 4 and 25 to form a settling sludge monitoring unit (window).

The outlet 1 of the small-sized combined treatment septic tank 18
8b flows into the discharge water channel 26 used by the single treatment septic tank 16.

With the above construction, even if the sewage is released vigorously, such as when the sewage in the bathtub is dropped, the sewage once flows into the original sedimentation separation chamber 1 of the single treatment / purification tank 16 and is directly discharged. Does not flow into the small-sized combined treatment / purification tank 18, so that it serves as an inflow adjustment tank, that is, a buffer, and is configured to flow sewage into the small-sized combined treatment / purification tank 18 via the water dividing basin 21. Therefore, the action in the precipitation separation tank 11 is not hindered by the water force.

Further, the sludge settling at the bottom of each tank of the small-sized combined treatment / purification tank 18 is transmitted to a transparent pipe 23 serving as a monitoring unit (window).
Since the precipitation status can be monitored at a, 24a and 25a, accurate cleaning management can be performed. In the embodiment, transparent pipes 23a, 24a, and 25a are used as the monitoring unit using a part of the discharge pipe.
A transparent window may be provided on the lower side surface of each of the tanks 11, 12, 13, and 14 to serve as a monitoring unit.

Since the settling sludge is once dropped into the single treatment septic tank 16 and then discharged by a vacuum car through the vacuum hose 27, the removal of the settled sludge can be completed in a short time. Workability is much better than burying underground.

[0024]

Other Embodiments In the above embodiment, the single treatment septic tank was of a two-tank type, but may be of a single-tank type. The two-tank type is preferred, but in the case of the one-tank type, even if the concentration of the discharged sludge may be reduced, it is usually cleaned and removed once or twice a year. This is a better system than cleaning a septic tank.

Further, in the above embodiment, the case where the separation and aeration type was used as the small-sized combined treatment septic tank was described, but it is needless to say that the anaerobic bed contact and aeration type may be used. It is. However, in consideration of cost and internal cleaning, the separated contact aeration type is preferable.

When the present system is implemented in a cold region, it is a matter of course that facilities on the ground are covered with a heat insulating material such as a foamed resin material.

[0027]

According to the merged treatment septic tank system of the present invention, there is no need to excavate the existing single treatment septic tank.
In addition, the function of the small-sized combined treatment / purification tank is not degraded by the wastewater which is effectively used as the inflow control tank and enters a large amount in a short time.

As described above, not only does it not require excavation of a single treatment septic tank, but also does not require burial of a small combined treatment septic tank made based on the structural standards established by the Ministry of Construction, and it is installed on the ground. It is an effective system that does not require construction costs and promotes switching to a small-scale merger treatment septic tank.

Furthermore, since the monitoring system monitors the status of the settled sludge, there is an advantage that the cleaning timing can be accurately known.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a known separation and contact aeration type single treatment septic tank.

FIG. 2 is a cross-sectional view of a small-sized combined treatment septic tank of a known anaerobic filter contact aeration type.

FIG. 3 is a cross-sectional view of a well-known separation / attachment-type aeration type small-sized combined treatment septic tank.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Precipitation separation chamber 2 Contact aeration chamber 3 Precipitation chamber 4,5 Anaerobic filter bed tank 6,13 Contact aeration tank 7 Contact material 8,14 Precipitation tank 9,15 Disinfection device 10 Sludge transfer pipe 11,12 Precipitation separation tank 16 Separate treatment septic tank 17 gantry 18 Small combined treatment septic tank 19 Pump 20 Pumping pipe 21 Water distribution basin 22 Overflow pipe 23-25 Discharge pipe 26 Discharge water channel 27 Vacuum hose

Claims (1)

(57) [Claims] 1. A small-sized combined treatment / purification tank made in accordance with the structural standards established by the Ministry of Construction is provided on the ground, and a monitoring window for settling sludge is provided below each tank of the small-sized combined treatment / purification tank. The bottom is configured to discharge the settled sludge to the existing single treatment septic tank via an on-off valve, and the wastewater flowing into the existing single treatment septic tank is pumped to the small combined treatment septic tank via a water separation basin. Sending, the overflow sewage of the diversion basin is returned to the single treatment septic tank, and the discharge of the small combined treatment septic tank is configured to be discharged to the discharge water channel of the single treatment septic tank or the newly installed discharge water channel. A combined treatment septic tank system that uses a single treatment septic tank.