JP2000070972A - Septic tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure of the primary treatment vessel and to stably support a disinfection cylinder while disinfecting suitably the water discharge, at the time of performing emergency water discharge from a primary treatment vessel, in the septic tank. SOLUTION: This septic tank is provided with: a primary treatment vessel 1 into which water to be treated is charged; and a secondary treatment vessel 2 for performing secondary treatment such as aeration treatment, of primary- treated water which is subjected to primary treatment in the treatment vessel 1 and transferred to the secondary treatment vessel 2; wherein the primary vessel 1 is provided with an emergency water discharged port 3 consisting of a water discharge pipe 5 the lower surface 4 of which is formed into a flat face, and a disinfection cylinder 7 is fitted to a hole 6 that is formed in the upper surface of the water discharge pipe 5 through its pipe wall, in such a way as to be inserted into and extend through the hole 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a septic tank and, more particularly, to simplify the structure of the discharged water from a primary treatment tank in an emergency while disinfecting the discharged water satisfactorily.
The present invention relates to a technique for stably supporting a disinfecting cylinder.

[0002]

2. Description of the Related Art Conventionally, in a septic tank, a primary treatment tank for introducing wastewater to be treated and a secondary treatment for advancing the primary treatment water treated in the primary treatment tank to perform secondary treatment such as aeration treatment. A treatment tank is provided, and an emergency discharge port is provided in the primary treatment tank to prepare for an overflow in an emergency.

By the way, a septic tank provided with an emergency discharge port is completely partitioned into two or more insides, unlike an extrusion-type septic tank that sends out treated water. The primary processing tank or the secondary processing tank having such a configuration is provided with a flow rate adjusting function, for example, when water or washing water in the bathtub flows in,
The inflow is adjusted, and the flow is gradually transferred to a secondary processing tank such as an aeration tank.

In an emergency where the inflow is large, such as when the flow rate cannot be adjusted by the flow rate adjustment function, an emergency discharge port is provided to discharge the wastewater from the backflow and the discharge of wastewater from the manhole. In such a case, since a large load is applied to the environment, a disinfecting cylinder is provided at the emergency discharge port.

[0005]

As shown in FIG. 3, a conventional emergency outlet 3 has a channel member a having a flat bottom surface 4a and an open upper portion, and a channel member b having an open lower portion. And three parts of a cylindrical pipe c are bonded with an adhesive.

However, at present, emergency outlets are rarely used.
There are many parts, and there is a problem that it is difficult to stably support the disinfecting cylinder 7 and it is difficult to maintain a stable function for a long time.

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem, and it is possible to simplify the structure of an emergency discharge water from the primary treatment tank while satisfactorily disinfecting the discharged water. It is an object of the present invention to provide a processing tank capable of stably supporting the processing tank.

[0008]

According to a first aspect of the present invention, there is provided a primary treatment tank for charging wastewater to be treated, and a secondary treatment such as aeration treatment by advancing primary treatment water treated in the primary treatment tank. And a secondary processing tank 2 for performing a secondary processing, and a primary processing tank 1
A septic tank provided with an emergency discharge port 3, wherein a bottom surface 4 of a discharge pipe 5 forming the emergency discharge port 3 is formed as a flat surface and a disinfection cylinder is formed in a hole 6 formed on an upper surface of the discharge pipe 5. 7 is inserted and held. According to such a configuration, by making the bottom surface of the discharge pipe 5 a flat surface, the component having the flat bottom surface 4 and the component holding the disinfecting cylinder 7 can be integrated, the number of components can be reduced, and the cost can be reduced. Is to be reduced.

According to a second aspect of the present invention, the tip of the discharge pipe 5 is formed in a cylindrical shape and is connected to the discharge pipe 15. According to such a configuration, the discharge pipe 5 can be easily connected to the cylindrical discharge tip pipe 15, and the productivity is not reduced.

In the third aspect, the hole 6 of the discharge pipe 5 is provided.
And an upright guide 8 is provided. According to such a configuration, the disinfecting cylinder 7 can be stably held by the upright guide 8, and the predetermined function of the emergency discharge port 3, which is less frequently used, is maintained for a long time.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is a schematic sectional view of a septic tank, FIG. 1B is a cutaway perspective view of a discharge pipe 5, and FIG. 1C is a front view.

As shown in FIG. 1A, the septic tank A is, for example, a compact-type combined septic tank, and includes an aeration tank 9 and a disinfection tank 10. A tank 11 and a second foreign matter removing tank 12 are arranged. For example, domestic wastewater from a toilet, a sink, a kitchen or the like is introduced into the first foreign matter removing tank 11 and the second foreign matter removing tank 12 is provided.
After the solid content is separated, the sewage as the water to be treated is transferred to the aeration tank 9 by the transfer pump P. Here, the first foreign matter removal tank 11 and the second foreign matter removal tank 12 constitute the primary treatment tank 1, and the aeration tank 9 and the disinfection tank 10 constitute the secondary treatment tank 2.

In the aeration tank 9, for example, a membrane separation device 13 provided with a plurality of filtration membranes 1 for membrane separation, and an air diffuser 14 for blowing air from a blower are provided.
The intermittent aeration from step 4 allows activated sludge (aerobic) treatment by microorganisms for biodegradation and (anaerobic) treatment for nitrogen removal. That is,
Air is blown in from a blower for aerobic treatment with activated sludge, and blown out from the diffuser 14 to perform aeration. Further, in this aeration step, nitrification, which is one step for finally removing nitrogen from wastewater as nitrogen gas, is performed. Next, the blowing of air from the air diffuser 14 is stopped, and a non-aerated state is established, and denitrification is performed as a non-aerated step. In this way, in the aeration tank 9 that performs intermittent aeration, decomposition of organic matter in wastewater and removal of nitrogen are performed.

The time for one cycle consisting of the aeration step and the non-aeration step can be, for example, about 1 to 2 hours, and each step can be about 15 to 75 minutes. .

Similarly, without limitation, the concentration of activated sludge may be, for example, about 2,000 to 20,000 (mg / mg).
L).

Regarding the introduction of sludge into the aeration tank 9, the design minimum water level (LWL: Low Water Lin) of the aeration tank 9 is measured by a water level sensor (not shown), for example.
e), the transfer pump P is operated, and the designed maximum water level (HWL: High Water) of the aeration tank 9 for operating the sewage is shown.
Line). Such a charging timing can be considered so as to be performed, for example, in the latter half of the aeration step in which the water level of the aeration tank 4 drops, or together with the start of the aeration step after the end thereof.

The contaminant treatment tank 11 which is the primary treatment tank 1 is provided with an emergency discharge port 3 to prepare for overflow in an emergency. The details will be described below.

The discharge pipe 5 forming the emergency discharge port 3 is made of resin. As shown in FIGS. 1B and 2A, the bottom surface 4 is formed flat and the discharge pipe 5 is formed. A hole 6 is formed on the upper surface of the
Are formed integrally, and the disinfecting cylinder 7 is inserted and held in the upright guide 8. A cap 17 is placed on the upper end of the disinfecting cylinder 7. In addition, the distal end of the discharge pipe 5 is formed in a cylindrical shape, and the discharge end pipe 15 is inserted and connected.

As described above, by making the bottom surface of the discharge pipe 5 a flat surface, it is possible to contact the medicine 16 inside through the slit 7a of the disinfecting cylinder 7 which reaches the bottom surface 4 of the flat surface at the time of emergency discharge. Stable disinfection is performed even when a small amount of water is discharged, and the parts having the flat bottom surface 4 and the parts holding the disinfecting cylinder 7 can be integrated, and the number of parts can be reduced.
It reduces costs. Furthermore, since the tip of the discharge pipe 5 is formed in a cylindrical shape, the discharge pipe 5 can be easily connected to the cylindrical tip discharge pipe 15 without lowering the productivity. Furthermore, the disinfecting cylinder 7 can be stably held by the standing guide 8 integrally provided in communication with the hole 6 of the discharge pipe 5, and the emergency discharge port 3 which is used less frequently has the predetermined function. Keep it for a long time.

[0021]

According to the first aspect of the present invention, there is provided a primary treatment tank for charging wastewater to be treated, and a secondary treatment for advancing the primary treatment water treated in the primary treatment tank to perform secondary treatment such as aeration treatment. A purification tank provided with a treatment tank and an emergency discharge port in the primary processing tank, wherein the bottom surface of the discharge pipe forming the emergency discharge port is formed as a flat surface and the hole formed on the upper surface of the discharge pipe. Since the disinfecting cylinder is inserted and held, the bottom surface of the discharge pipe can be flattened, and the parts with a flat bottom surface and the parts that hold the disinfecting cylinder can be integrated, reducing the number of parts. This has the advantage that the cost can be reduced.

In the second aspect, the tip of the discharge pipe is formed in a cylindrical shape and connected to the discharge tip pipe. Therefore, in addition to the effect of the first aspect, the discharge pipe is formed into a cylindrical discharge tip pipe. There is an advantage that the connection can be easily made and the productivity is not reduced.

According to the third aspect, since the upright guide is provided in communication with the hole of the discharge pipe, in addition to the effect of the first aspect, the disinfecting cylinder can be stably held by the upright guide. There is an advantage that the predetermined function of the infrequent emergency outlet can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, in which (a) is a schematic sectional view, (b) is a broken perspective view showing an emergency discharge port,
(C) is a front view.

FIG. 2 (a) is an exploded perspective view of the same, and FIG. 2 (b) is an explanatory view showing an operation of putting a medicine into a disinfecting cylinder.

FIG. 3 is a perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Primary treatment tank 2 Secondary treatment tank 3 Emergency discharge port 4 Bottom 5 Discharge pipe 6 Hole 7 Bottom 8 Standing guide

Claims (3)

[Claims] 1. A primary treatment tank for charging wastewater to be treated, and a secondary treatment tank for performing a secondary treatment such as an aeration treatment by advancing the primary treatment water treated in the primary treatment tank, A purification tank with an emergency discharge port in the primary treatment tank, the bottom of the discharge pipe forming the emergency discharge port is formed flat and the disinfection cylinder is inserted into the hole formed on the top of the discharge pipe. A septic tank characterized by being held. 2. The septic tank according to claim 1, wherein the end of the discharge pipe is formed in a cylindrical shape and connected to the discharge end pipe. 3. The septic tank according to claim 1, wherein an upright guide is provided in communication with the hole of the discharge pipe.