JP2000288566A - Septic tank and arranging method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably arrange a two-tank separation type septic tank consisting of a septic main tank and a septic sub-tank by providing a support part for supporting the septic sub-tank to the septic main tank. SOLUTION: A septic tank 100 is constituted of a septic main tank which is constituted so that water to be treated is transferred in the order of an impurity removing tank N, a flow rate adjusting tank B1, a sedimented sludge storage tank B2 and a membrane separation tank E from an upstream side and a septic sub-tank 102 forming the arranging space of a disinfection tank Q and a pump 9 and the respective tanks are partitioned by partition walls W. The septic main tank 101 is formed by the butt-joining of upper and lower main bodies 101a, 101b at the flange part 103 of both bodies. The septic sub-tank 102 is formed so as to become wide upwardly and the side wall part thereof has a shape conforming to the septic main bank 101 and the sub-tank 101 is integrally bonded to the septic main tank 101 in the state placed on the flange part 103 being a support part to be supported stably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a septic tank comprising a septic tank main tank and a septic tank sub-tank, and more specifically, for example, a membrane provided with a suction pump for sucking water to be treated and permeating a filtration membrane. The present invention relates to a septic tank provided with a septic tank main tank provided with a separation tank and a disinfecting tank for disinfecting the water to be treated that has passed through the filtration membrane, and further relates to a method for installing such a septic tank.

[0002]

2. Description of the Related Art Conventionally, a septic tank consisting of only the above-mentioned septic tank main tank has been widely used, but for the purpose of disinfecting and temporarily storing recyclable water to be treated via a membrane separation tank. There has been proposed a two-tank separation type in which a septic tank is constituted by a septic tank main tank and a septic tank sub-tank. Such a septic tank is effectively used in the sense that clean treated water containing almost no sludge is separated from treated water containing a large amount of sludge components. In other words, by using a separate casing, it is possible to stabilize the water component to be treated inside, and at the same time, it is possible to expect an effect that maintenance can be easily performed.

[0003]

However, such a septic tank requires a connecting pipe for connecting the two tanks, and the pipe work tends to be troublesome. In addition, even if such a construction work is performed, the relative position of the two tanks may be changed due to loosening of the ground due to rainwater, movement of the ground due to land subsidence, or the like, which hinders the connection pipe. There was a fear. Such a phenomenon is considered to be a phenomenon that tends to occur in a small and lightweight septic tank sub-tank, and in particular, stable arrangement of the septic tank sub-tank is desired.

Accordingly, an object of the present invention is to provide a septic tank which can be stably arranged even in a two-tank separation type in view of the above situation.

[0005]

A feature of the present invention for achieving this object is a septic tank comprising a septic tank main tank and a septic tank sub-tank, wherein the septic tank main tank is provided with the septic tank sub-tank. The point is that a supporting portion for supporting is provided. Further, a pair of upper and lower divided members are provided, a flange portion is provided at an opening edge of each of the divided members, and the two divided members are integrally joined by abutting each other's flange portions to constitute the septic tank main tank. The flange may be formed on the support. Further, the septic tank sub-tank may be formed in an upwardly widened shape that opens larger toward the upper side, and the lower end may be formed so as to be mountable on the flange section. A septic tank main tank provided with a membrane separation tank provided with a suction pump to be provided, and a septic tank provided with a disinfecting tank for disinfecting the water to be treated that has passed through the filtration membrane, wherein the disinfecting tank is provided with the purifying tank main tank main body. Is preferably provided in a separate septic tank sub-tank. Further, a characteristic configuration of the method for installing a septic tank according to the present invention is that in a septic tank including at least two casings, the casings are buried while forming a stable posture in the soil by linking the casings. Further, it is preferable that the septic tank is constituted by a septic tank main tank and a septic tank sub tank, and both tanks are buried integrally with the septic tank sub tank mounted on the septic tank main tank.

[Effects] In a septic tank composed of a septic tank main tank and a septic tank sub-tank, if the purifying tank main tank is provided with a support for supporting the septic tank sub-tank, the more stable septic tank main tank is provided with the septic tank. It can be handled in a state where the sub-tank is supported, can be stably buried, and connection pipes and the like can be made reliable. At this time, the part having the main function (usually the largest) of the septic tank is referred to as a septic tank main tank, and all other parts are referred to as a septic tank sub-tank. Also, the number of septic tank sub-tanks does not matter. In addition, when the septic tank sub-tank is supported by the septic tank main tank, it is preferable from the viewpoint of handling that both are integrated by bonding and fastening.

Further, a pair of upper and lower split members are provided, a flange portion is provided at an opening edge of each of the split members, and the two split members are joined together by abutting the flange portions with each other to form the septic tank main tank. With this configuration, the septic tank main tank is joined in a watertight manner at the flange portion, and the flange portion stabilizes the embedding posture of the main tank. Further, since the flange portion is projected outside the septic tank, the septic tank sub-tank can be stably supported by engaging the septic tank sub-tank with the flange portion. At this time, it is preferable that the septic tank sub-tank is formed in a shape along the outer surface shape of the septic tank main tank. Can be taken.

Further, if the septic tank sub-tank is formed in an upwardly widened shape that opens greatly toward the upper side, and the lower end is formed so as to be mountable on the flange, the septic tank sub-tank is mounted on the narrow flange. Can be easily mounted, and the structure can be reliably supported by the septic tank main tank. In addition, in the opening, an easy-to-work space can be easily secured at the time of maintenance or the like.

A purifying tank main tank provided with a membrane separation tank provided with a suction pump for sucking water to be treated and permeating the filtration membrane;
In a septic tank provided with a disinfecting tank for disinfecting the water to be treated that has passed through the filtration membrane, the disinfecting tank is provided in a septic tank subtank separate from the septic tank main tank main body, so that the septic tank main tank is provided. In addition, it is easy to eliminate the possibility that the treated water compositions of the sub-tanks are mixed with each other, which is advantageous, for example, when the treated water in the disinfection tank is reused. In addition, since the disinfection tank part requiring particularly high maintenance is separated from the membrane separation tank part, the space to be managed can be narrowed, and the work efficiency of the maintenance worker can be improved.

In the method for installing a septic tank according to the present invention, in a septic tank composed of at least two casings, the casings are linked to each other, so that a stable posture in the soil can be formed and the two casings can be formed. Even a septic tank can be easily installed stably.

At this time, if the septic tank is constituted by a septic tank main tank and a septic tank sub tank, and the septic tank sub tank is placed on the septic tank main tank, the load of the septic tank sub tank is reduced by the purifying tank. By receiving it in the main tank, the instability of the septic tank sub-tank can be prevented, and overall stabilization can be achieved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The purifying tank 100 shown in FIG. 1 will be described. The purifying tank is configured so that the water to be treated flows through the impurity removing tank N, the flow rate adjusting tank B1, the settling sludge storage tank B2, and the membrane separating tank E in the stated order from the upstream side. A tank 101 and a septic tank sub-tank 102 forming a space for disinfecting tank Q and pump 9
, And each tank is partitioned by a partition wall W. The septic tank main tank includes an upper main body 101a and a lower main body 10a.
1b is butt-joined with a flange 103 to form a water treatment space.

The contaminant removal tank N receives the raw water flowing from the inflow port I as the water to be treated, and separates solids precipitated from the water to be treated and solid components such as scum generated on the liquid surface while separating them. Mainly, the liquid component of the raw water is freely spontaneously transferred to the flow control tank B, and anaerobic bacteria that anaerobically decompose the water to be treated are grown therein. In addition, F in the figure is an advection pipe provided with an opening F1 at the center in the width direction of the impurity removing tank N, and the water to be treated that has reached the reference water level of the impurity removing tank N is filtered by the filter medium F2. Then, it is configured to flow into the flow rate adjusting tank B from the opening F1. In addition, first and second guide paths G1 and G2 are provided above the advection pipe F to guide the water to be treated, which has reached a predetermined water level slightly above the reference water level, to a portion other than the flow rate adjusting tank B. .

The flow rate adjusting tank B1 includes a measuring device 1a and a transfer air lift pump 1b, and temporarily stores the liquid component of the to-be-processed water spontaneously transferred from the contaminant removing tank N. It is formed so that it can be almost quantitatively transferred to the separation tank E via the transfer pipe 1c.

The membrane separation tank E purifies water to be treated by filtering it with a plurality of flat membranes M as filtration membranes.
In the membrane separation tank E, aerobic bacteria that aerobically decompose the organic components of the water to be treated are grown. Further, with the flat membrane M attached to the inside of the tank, an air diffuser D is provided below the flat membrane M to supply air bubbles to prevent sludge and the like from adhering to the surface of the flat membrane M. Therefore, oxygen can be supplied to the aerobic bacteria by performing an aeration operation from the air diffuser D, and the surface of the flat membrane can be washed, so that the membrane separation processing performance of the flat membrane M can be maintained at a high level.

The flat membrane M as a filtration membrane is formed by bonding a polyethylene filtration membrane member to both surfaces of an ABS resin support plate having a water passage portion to be treated inwardly, Nozzle 4 communicating with the part is connected,
With the flat membrane M immersed in the water to be treated, the nozzle 4
When the suction operation is performed, the water to be treated passes through the filtration membrane member, the sludge and the like in the water to be treated are removed by the filtration membrane member, and the highly purified water to be treated can be taken out. Here, the filtration membrane member 6 is a critical filtration membrane having a pore diameter of 0.3 μm or less. By selecting such a pore diameter, contamination in the membrane can be prevented for long-term use, Maintenance-free operation becomes possible.

The nozzle 4 is connected to a suction pump 9 provided in a disinfecting tank Q of the purification tank sub-tank 102, and by operating the suction pump 9, the water to be treated is separated by the flat membrane M. (Referred to as permeated water to be treated) is sent to a disinfection tank Q as a disinfection mechanism provided outside the septic tank. Here, as shown in the figure, the suction pump 9 is provided at an external portion of the purification tank side wall 104 to ensure easy maintenance, and the suction pump 9 is disposed at a position lower than the lowest water level of the membrane separation tank E. Have been. Therefore, even when the suction pump 9 stops, the inside of the suction pump 9
The water to be treated remains and becomes priming water at restart. The septic tank sub-tank 102 is formed so as to be wider at the upper side, and the side wall portion is formed along the septic tank main tank 101, and is integrated by bonding while being mounted on the flange portion 103 as a support portion. The configuration is such that the purification tank main tank 101 can be stably supported.

A first guide path G1 provided above the advection pipe F
Is connected to the disinfecting tank Q and constitutes an overflow mechanism that enables the water to be treated to be supplied to the disinfecting tank Q without passing through the membrane separation tank E. When the water levels of the impurity removal tank N and the flow rate adjustment tank B1 are high, the low-load water to be treated that has flowed into the tank in large quantities can be directly transferred to the disinfection tank Q and used as regenerated water. . Also,
The second guide path G2 is connected to a temporary storage tank T provided separately from the septic tank main tank 101, and even in the same case as above, a large amount of the low-load treated water flows in the daytime. In a case where there is a possibility of merging with the water supply from the service water pipe, the first guide path G1 is closed so that the low-load water to be treated can be stored in the temporary storage tank T. It is configured in. Incidentally, such first and second guide paths G1,
G2 switching is a timer-linked switching mechanism (not shown)
Performed by

By employing the above configuration, the raw water flowing from the inlet I is quantitatively transferred to the membrane separation tank E via the flow rate adjustment tank B while being separated into solid and liquid in the impurity removal tank N. After being highly purified in the membrane separation tank E, the water is quantitatively discharged out of the purification tank via the disinfection tank Q. The water to be treated via the disinfection tank Q can be effectively reused.

In addition, such a septic tank is buried while forming a stable posture in the soil by associating the casings with each other. In other words, the septic tank main tank 101 and the septic tank sub-tank 102 are fixed with the septic tank sub-tank 102 mounted on a flange 103 serving as a support portion of the septic tank main tank 101, and both tanks are embedded together.

Further, the support portion includes a flange portion 1
In addition to using 03, the septic tank main tank 101 and the septic tank sub-tank 102 may be provided on the support section with engaging portions that engage with each other.

[Brief description of the drawings]

FIG. 1 is a vertical side view of a septic tank according to an embodiment of the present invention.

FIG. 2 is a plan view of a septic tank according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 100 septic tank 101 septic tank main tank 102 septic tank sub-tank 103 support

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hisato Tsujikawa 2nd Takamatsu, Kosai-cho, Koka-gun, Shiga Prefecture F-term in Kubota Shiga Plant (reference) 3E070 AA02 AB01 GB01 GB04 RA01 RA09 RA30 TA01 4D027 AB07 AB12

Claims (6)

[Claims] 1. A septic tank comprising a septic tank main tank and a septic tank sub-tank, wherein the septic tank main tank is provided with a support for supporting the septic tank sub-tank. 2. A septic tank main tank comprising a pair of upper and lower split members, a flange portion provided at an opening edge of each of the split members, and abutment of the flange portions with each other to integrally join the two split members. The septic tank according to claim 1, wherein the flange portion is formed on the support portion. 3. The septic tank according to claim 2, wherein the septic tank sub-tank is formed in an upwardly widened shape that opens larger upward, and a lower end portion is formed so as to be mountable on the flange portion. 4. A septic tank main tank having a membrane separation tank provided with a suction pump for sucking water to be treated and permeating the filtration membrane is provided, and a disinfection tank for disinfecting the water to be treated permeating the filtration membrane is provided. The septic tank according to any one of claims 1 to 3, wherein the sterilizing tank is provided in a septic tank sub-tank separate from the septic tank main tank main body. 5. A method of installing a septic tank comprising at least two casings, wherein the casings are buried while forming a stable posture in the soil by associating the casings with each other. 6. The septic tank according to claim 4, wherein the septic tank comprises a septic tank main tank and a septic tank sub-tank, and both tanks are buried integrally with the septic tank sub-tank mounted on the septic tank main tank. Installation method.