JP3688146B2 - Septic tank - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a membrane separation tank that sucks water to be treated and permeates the filtration membrane, and has an upstream tank that biologically treats the water to be treated supplied to the membrane separation tank in advance, and the membrane that has passed through the filtration membrane The present invention relates to a septic tank that includes a water supply mechanism that enables supply of permeated treated water to a water supply unit, and is provided with a disinfection mechanism that disinfects the membrane permeated treated water supplied to the water supply unit.
[0002]
[Prior art]
Conventionally, as this type of septic tank, the water to be treated that has flowed into the septic tank is received as it is in the upstream tank, and the entire amount passes through the filtration membrane and can be supplied to the water supply unit. What has been proposed.
[0003]
[Problems to be solved by the invention]
However, the water to be treated that flows into the septic tank is not necessarily biologically treated in advance in the upstream tank, and low-load treated water such as bath drainage (hereinafter referred to as low-load treated water). In some cases, it merely compresses the volume in the septic tank and delays the treatment of the water to be treated in the water purification facility. Here, in the case where the inflow of the water to be treated is continuous, the water level in the tank may rise too much and exceed the membrane filtration treatment capacity. In addition, when such a large amount of water to be treated is received, the water to be treated in the upstream side tank is in an oxygen-enriched state, which is liable to adversely affect the preliminary biological treatment. The treated water that has flowed in causes the sedimentation sludge and the like in the upstream tank to flow away and flow into the membrane separation tank, which may adversely affect the membrane separation tank.
[0004]
In addition, there are many cases in which the time for demand for membrane filtration treated water is limited to a part of the time of the day. In some cases, it could not be used effectively because it had to be released.
[0005]
Accordingly, an object of the present invention is to provide a septic tank that does not adversely affect the water treatment environment even when receiving a large inflow of water to be treated, and that can effectively use membrane permeation treated water. .
[0006]
[Means for Solving the Problems]
To achieve this object, the first characteristic configuration of the septic tank of the present invention includes an upstream tank for biologically treating the water to be treated in advance, and a membrane separation for sucking the biologically treated water to be permeated through the filtration membrane. A sterilization tank provided with a tank, a disinfection tank that disinfects the membrane permeation treated water that has passed through the filtration membrane, and a water supply mechanism that enables supply of the disinfected membrane permeation treated water to a water supply unit, A tank is provided in a tank separate from the upstream tank and the membrane separation tank, a flow medium is provided on the raw water inflow side of the upstream tank, and a convection pipe having an opening at the lower end is provided. An overflow mechanism for connecting the water to be treated, which sets the upstream tank to a predetermined water level or higher, to the disinfecting tank without passing through the membrane separation tank is connected to the upper end of the tank.
The second characteristic configuration of the purification tank of the present invention includes a membrane separation tank that sucks water to be treated and permeates the filtration membrane, and includes an upstream tank that biologically treats the water to be treated supplied to the membrane separation tank in advance. A septic tank provided with a water supply mechanism capable of supplying the membrane permeate treated water that has passed through the filtration membrane to the water supply unit, and provided with a disinfection mechanism for disinfecting the membrane permeate treated water supplied to the water supply unit, A storage mechanism that allows temporary storage of treated water that makes a side tank above a predetermined water level, and water that makes the upstream tank above a predetermined water level can be supplied to the disinfection mechanism without going through the membrane separation tank An overflow mechanism is provided, and a switching mechanism is provided to selectively supply the treated water to the storage mechanism or the overflow mechanism.
[0007]
[Function and effect]
In other words, the septic tank equipped with a membrane separation tank that sucks the water to be treated and permeates the filtration membrane, because the membrane permeation treated water that has passed through the filtration membrane is substantially free of particulate components, The membrane permeation treated water can be reused. Here, the septic tank usually includes an upstream tank that biologically treats the water to be treated supplied to the membrane separation tank in advance, so that the load of the membrane separation tank is stabilized and the components of the water to be treated are long-term. Enables stable membrane separation treatment. Therefore, if a water supply mechanism that enables supply of the membrane permeated treated water that has passed through the filtration membrane to the water supply unit is provided, the purified membrane permeated treated water can be reused. At this time, if a disinfection mechanism for disinfecting the membrane permeation treatment water supplied to the water supply unit is provided, the reused membrane permeation treatment water can be prevented from adversely affecting the surrounding environment.
[0008]
Here, in order to stably supply the membrane permeation treated water , it is necessary that the water treatment in the tank and the treated water supply be stable. Therefore, the treated water that has flowed in a large amount is supplied by the overflow mechanism to the disinfection mechanism without passing through the membrane separation tank, so that the treated water that brings the upstream tank to a predetermined water level or higher is supplied, for example, Low-load treated water that can be reused only by disinfection can be supplied to the water supply unit. As a result, the upstream tank does not exceed the predetermined water level, and can maintain a stable water treatment capacity as the entire septic tank, and easily obtain membrane-permeated treated water supplied to a high level on the ground.
[0010]
Furthermore, a storage mechanism that allows temporary storage of treated water that makes the upstream tank above a predetermined water level, and the disinfection of the treated water that makes the upstream tank above a predetermined water level without going through the membrane separation tank If there is provided an overflow mechanism that enables supply to the mechanism and a switching mechanism that selectively supplies the treated water to the storage mechanism or the overflow mechanism, for example, the membrane filtered treated water In the case where there is a risk of receiving an inflow of low-load treated water when supplying water to the water supply unit, the supply destination of the low-load treated water is the storage mechanism, otherwise, or When the storage mechanism reaches the capacity limit, the supply destination of the low-load treated water is the overflow mechanism, so that the reclaimed water can be reliably supplied to the water supply unit, and stable water treatment can be realized.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
The purification equipment shown in FIG. 1 includes a purification tank 100 having a configuration unique to the present application, a pumping pipe 101 and a water supply unit 102 connected to the purification tank 100. Here, in FIG. 1, the example in which the water supply part 102 is comprised as a watering part (watering equipment) to a roof is shown.
Now, the septic tank 100 will be described. This is such that the water to be treated is transferred from the upstream side to the contaminant removal tank N, the flow rate adjustment tank B1, the sedimentation sludge storage tank B2, and the membrane separation tank E in the order of description. Each tank is partitioned by a partition wall W. Here, the contaminant removal tank N, the flow rate adjustment tank B1, and the sedimented sludge storage tank B2 correspond to the upstream tank with respect to the membrane separation tank E.
[0012]
The contaminant removal tank N receives the raw water flowing in from the inlet I as treated water and separates solid components such as scum generated on the liquid surface and solid matter precipitated from the treated water, An anaerobic bacterium that anaerobically decomposes the water to be treated is cultivated inside the liquid component of the raw water so that it can be naturally transferred to the flow rate adjusting tank B1 .
In the figure, F is an advection pipe provided with an opening F1 at the center in the width direction of the contaminant removal tank N, and the water to be treated that has become above the reference water level of the contaminant removal tank N is filtered by the filter medium F2. And is configured to flow into the flow rate adjusting tank B1 from the opening. Further, the upper part of the advection pipe F is provided with first and second guide paths G1 and G2 for guiding the water to be treated that has reached a predetermined water level slightly above the reference water level to other than the flow rate adjusting tank B1. .
[0013]
The flow rate adjustment tank B1 includes a measuring device 1a and a transfer air lift pump 1b, temporarily stores the liquid component of the water to be treated that has naturally transferred from the contaminant removal tank N, and the membrane separation tank E It is formed so that it can be transferred almost quantitatively through the transfer pipe 1c.
[0014]
The membrane separation tank E purifies the treated water by filtering it with a flat membrane M as a plurality of filtration membranes, and aerobic decomposes the organic components of the treated water in the membrane separation tank E. Bacteria are grown. Furthermore, with the flat membrane M attached in the tank, an air diffuser D is provided below the flat membrane M to supply bubbles and prevent sludge and the like from adhering to the surface of the flat membrane M. Therefore, by performing aeration operation from the aeration tube D, oxygen can be supplied to the aerobic bacteria, and the surface of the flat membrane can be washed, so that the membrane separation performance of the flat membrane M can be maintained high.
[0015]
The flat membrane M as a filtration membrane is formed by adhering and forming a polyethylene filtration membrane member on both surfaces of an ABS resin support plate having a treated water conducting portion on the inside, and communicating with the treated water conducting portion. When the suction operation is performed from the nozzle 4 in a state where the flat membrane M is immersed in the water to be treated, the water to be treated passes through the filtration membrane member, and the filtration membrane member Sludge and the like in the treated water are removed, and the treated water that has been highly purified can be taken out. Here, the filtration membrane member 6 is a microfiltration membrane having a pore diameter of 0.4 μm or less, and by selecting a membrane having such a pore diameter, contamination within the membrane can be prevented for a long period of use, and long-term Maintenance-free operation is possible.
[0016]
The nozzle 4 is connected in communication with a suction pump 9, and water to be treated (hereinafter referred to as membrane permeation treated water ) subjected to membrane separation treatment by the flat membrane M by operating the suction pump 9 is provided outside the septic tank. It works as a water supply mechanism that feeds water to the water supply section while feeding to the disinfection tank Q as a disinfected mechanism. Here, as shown in the figure, the suction pump 9 is provided outside the septic tank side wall 103 to ensure the ease of maintenance, and the suction pump 9 is disposed at a position lower than the lowest water level of the membrane separation tank E. Has been. Therefore, even when the suction pump 9 is stopped, the water to be treated remains in the suction pump 9 and serves as priming water at the time of restart.
[0017]
The first guide path G1 provided in the advection tube F top is communicatively connected to the disinfecting chamber Q, to supply available-the disinfecting chamber Q without passing through the membrane separation tank E water to be treated It constitutes the overflow mechanism. When the water levels of the contaminant removal tank N and the flow rate adjustment tank B1 are high, the low-load treated water that has flowed in large quantities into the tank can be transferred to the disinfection tank Q as it is and used as reclaimed water. . Further, the second guide path G2, and the body of the septic tank 100 Yes and communicatively connected to the temporary reservoir T provided separately, even if as in the previous, wherein said low-load processing water in the daytime mass When there is a possibility that the water will flow in and merge with the water supply from the water pipe, the first guide path G1 is closed and the low-load treated water is stored in the temporary storage tank T. It is configured to be able to. The first and second guide paths G1 and G2 are switched by a timer-linked switching mechanism (not shown).
[0018]
By adopting the above-described configuration, the raw water flowing in from the inlet I is quantitatively transferred to the membrane separation tank E via the flow rate adjustment tank B1 while being solid-liquid separated in the contaminant removal tank N, and membrane separation is performed. After being highly purified in the tank E, it is discharged quantitatively outside the septic tank via the disinfection tank Q.
[0019]
Now, on the downstream side of the above-described suction pump 9, a roof watering facility as a water supply unit 102 is connected via a pumping pipe 101. It is used for melting snow on the roof in winter and for cooling the roof in summer.
[0020]
[Another Example]
In the above embodiment, the water supply unit 102 is an example of a water spray unit provided on the roof. However, since the water to be treated by membrane separation has a high degree of purification, it is used for cooling water for air conditioning or for hand washing (for example, It can also be used for water supply to toilet water storage tanks.
Further, the switching between the first and second guide paths G1, G2 may be performed by manually switching each channel to open and seal.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a septic tank in an embodiment of the present invention. FIG. 2 is a plan view of a flat membrane support structure of a septic tank in an embodiment of the present invention.
9 Suction pump E Membrane separation tank N Contaminant removal tank corresponding to upstream tank
Flow adjustment tank corresponding to B1 upstream tank
Precipitation sludge storage tank 102 corresponding to B2 upstream tank Water supply part Q Disinfection mechanism G1 Overflow mechanism G2, T Storage mechanism

Claims (2)

An upstream tank for biologically treating the water to be treated in advance, a membrane separation tank for sucking the biologically treated water to be permeated through the filtration membrane, and a disinfection tank for disinfecting the membrane-permeated treated water that has passed through the filtration membrane And a septic tank provided with a water supply mechanism capable of supplying the sterilized membrane permeation treated water to a water supply unit,
The disinfection tank is provided in a separate tank from the upstream tank and the membrane separation tank,
The upstream side tank is provided with an advection pipe with a filter medium disposed at the lower end portion thereof on the raw water inflow side, and the upper end portion of the advection pipe is configured to have the upstream side tank at a predetermined water level or higher. A septic tank in which an overflow mechanism for supplying water to the disinfection tank without passing through the membrane separation tank is connected in communication. A membrane separation tank that sucks water to be treated and permeates the filtration membrane, an upstream tank that biologically treats the water to be treated that is supplied to the membrane separation tank, and has membrane permeation treated water that has passed through the filtration membrane. A septic tank provided with a water supply mechanism that enables supply to a water supply unit, and provided with a disinfection mechanism for disinfecting the membrane permeation treated water supplied to the water supply unit,
A storage mechanism that makes it possible to temporarily store water to be treated that makes the upstream tank above a predetermined water level, and a water treatment mechanism that makes the upstream tank above a predetermined water level to the disinfection mechanism without going through the membrane separation tank A septic tank provided with an overflow mechanism that enables supply, and a switching mechanism that selectively switches the supply of the treated water to the storage mechanism or the overflow mechanism.

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