JPH11253927A - Purification tank and living drainage recycling system equipped with this tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of offensive odors from a toilet seat and a washing water tank to which dead microorganisms which precipitate in treated water which was subjected to biological aeration, dirt, and others are transferred. SOLUTION: Treatment tanks 90a, 90b for purifying introduced raw water and a storage tank 90c for storing purified treated water are partition-formed through partition walls W1, W2, a first overflow port 21 of small diameter is formed at a position of a given height from a bottom part, a second overflow port 22 of large diameter is formed above the first overflow port 21, and the tanks 90a, 90b, 90c are made to communicate with each other. Moreover, a precipitate discharging pipe 25 in which one end is opened in the vicinity of the bottom part of the tank 90c, and the other end is opened outside the system is arranged to pass between the first overflow port 21 and the second overflow port 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a purification tank and a domestic wastewater recycling system provided with the purification tank.

[0002]

2. Description of the Related Art Conventionally, as a countermeasure against drought, water saving is encouraged in general households, and various proposals for saving water have been made.

[0003] In recent years, attention has been paid to a water saving system or the like that uses rainwater or domestic wastewater instead of tap water as flush water for flush toilets that consume a large amount of water.

[0004]

However, there are still problems to be solved in the above water saving system.

That is, when rainwater or domestic wastewater is used as flushing water for flush toilets, a purification tank for purifying and storing domestic wastewater or the like to the extent that it can be used as flushing water is necessary, but it is stored for a long time. In some cases, dirt adheres to the pipes and toilet bowl that send water as toilet flush water, and an unpleasant odor is generated.

In particular, the purification tank is divided into a treatment tank for performing biological treatment and aeration treatment and a storage tank for storing purified water, and domestic wastewater flowing into the treatment tank flows into the storage tank by overflow. In such a configuration, dead bodies of microorganisms and decomposed dirt accumulate as precipitates in the treatment tank, so that when a large amount of domestic wastewater flows into the treatment tank, the precipitate is rolled up and overflows into the storage tank. As a result, the precipitate was sometimes sent together with the treated water and flowed out to the low tank of the flush toilet. In this case, of course, an unpleasant odor is generated from the low tank or the washed toilet.

An object of the present invention is to provide a purification tank capable of solving the above-mentioned problems, and a domestic wastewater recycling system including the purification tank.

[0008]

In order to solve the above-mentioned problems, according to the present invention, a treatment tank for injecting treated water to be purified and performing a purification treatment, and storing the treated water after the purification treatment are provided. And a storage tank to be divided and formed through a partition wall. The partition wall is provided with a small-diameter first overflow port at a position at a certain height from the bottom, and a large-diameter second overflow port is provided above the first overflow port. A port is provided to allow the two tanks to communicate with each other, and a precipitate discharge pipe having one end near the bottom of the treatment tank and the other end opened outside the system is provided between the first overflow port and the second overflow port. Arranged to pass. Therefore, when a large amount of treated water flows into the treatment tank at one time and the water level rises above the first overflow port, the water level in the sediment discharge pipe similarly rises and flows out of the system,
At this time, the sediment deposited on the bottom of the treatment tank is sucked up and discharged, so that the sediment does not flow into the storage tank. On the other hand, since the water always overflows from the first overflow port, the water level in the treatment tank is maintained at the height of the first overflow port.

According to the present invention, a hypochlorous acid generator for supplying hypochlorous acid to the storage tank is provided. Therefore, since sterilization can be performed during storage, no odor is generated, and the stored water can be reused.

Further, according to the present invention, rinsing water from a washing machine and wastewater from a washing place in a bathroom are flown into the treatment tank of the purification tank according to claim 1 or 2 as domestic wastewater. The treatment water was overflowed from the treatment tank to the storage tank for storage, and the stored water was sterilized and disinfected with hypochlorous acid, so that the stored water could be supplied as toilet flushing water by a water supply means. Therefore, the treated water flowing into the purification tank is relatively less contaminated, and the water can be recycled without difficulty.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The purification tank according to the present invention can be suitably used for a domestic wastewater recycling system for recycling domestic wastewater as flush water for flush toilets.

The domestic wastewater recycling system purifies and stores domestic wastewater by flowing it into a purification tank, sterilizes and disinfects the stored domestic wastewater with hypochlorous acid, and sends it as toilet flush water by a water supply means. It is effective as a water saving system.

The purification tank is divided into a treatment tank for purifying domestic wastewater by biological treatment and aeration treatment and a storage tank for storing purified domestic wastewater. Preferably, the treatment tank is further divided into a primary tank and a secondary tank. Purifying power can be further improved by partitioning it into the next tank. In addition, the primary tank and the secondary tank can be connected by an overflow port.

[0014] With this structure, the living wastewater is biologically aerated and purified in the primary tank, and the biological aeration treatment can be performed again in the connected secondary tank to decompose organic substances and surfactants such as detergents. As a result, a sufficient purification action is generated.

It is preferable that the purified domestic wastewater from the treatment tank overflows and is stored in the storage tank.

Further, a hypochlorous acid generator may be attached to the purification tank to supply hypochlorous acid to the storage tank, so that sterilization and disinfection of domestic wastewater can be performed more reliably. It can be.

Furthermore, if the domestic wastewater is limited to a relatively less polluted one, the load of the purification action can be reduced. For this purpose, it is conceivable to limit domestic wastewater to, for example, running water in a bathroom or rinsing water from a washing machine.

The purification tank in the above-mentioned domestic wastewater recycling system has the following features.

That is, a treatment tank for purifying the treated water by flowing the treated water to be purified and a storage tank for storing the treated water for the purification are partitioned by partition walls, and the partition walls have a predetermined height from the bottom. A first overflow port having a small diameter is provided at the position of the first overflow port, and a second overflow port having a large diameter is provided at a position above the first overflow port to connect both tanks. Further, one end is provided near the bottom of the processing tank. , The other end of which is opened to the outside of the system, is connected to the first overflow port and the second overflow port.
It is configured to pass between the overflow port.

As described above, the processing tank can be divided into a primary tank and a secondary tank having the same configuration, and the first overflow port and the second overflow port are also provided between the primary tank and the secondary tank. One end of each of the sediment discharge pipes is opened near the bottom of both tanks. Then, the domestic wastewater inlet is facing the primary tank.

With this configuration, it is possible to efficiently discharge out of the system precipitates such as decomposed dirt and dead microorganisms that accumulate in the treatment tank, and these precipitates enter the storage tank. As a result, it is possible to prevent the generation of an odor from the low tank or the toilet of the flush toilet.

That is, when a large amount of domestic wastewater flows into the primary tank of the treatment tank and the water level rises from the first overflow port, the water level in the sediment discharge pipe similarly rises and goes out of the system. Will be leaked. At this time, the precipitate deposited on the bottom of the processing tank is sucked up and discharged.

At this time, the amount of domestic wastewater flowing in
When the flow rate is larger than the flow rate from the overflow port or the sediment discharge pipe, the water flows into the secondary tank from the second overflow port provided above the first overflow port. When the water level rises above the overflow port, the water level in the sediment discharge pipe similarly rises and flows out of the system, so that inflow of the sediment into the storage tank can be prevented as much as possible.

Therefore, every time a large amount of domestic wastewater flows in, the sediment is discharged out of the system, so that no sediment is deposited in the treatment tank, and the sufficiently purified treated water is contained in the storage tank. There is no danger of generating a bad smell from the toilet or the low tank by the toilet flush water stored and sent from the storage tank.

[0025] Naturally, it is preferable to provide an overflow drain port in the storage tank so that a certain amount or more of treated water is discharged. The overflow drain port is provided at the same height as or lower than the first overflow port of the treatment tank. The end of the sediment discharge pipe may be provided at the overflow drain so as to serve also as a discharge flow path.

The primary tank and the secondary tank of the processing tank are the first tank and the second tank.
The water level in the treatment tank is usually kept constant because of the communication through the overflow port.

Also, since the second overflow port is provided above the first overflow port, even if a large amount of domestic wastewater flows into the primary tank, the head difference between the first and second overflow ports is at the bottom. It serves as a cushion for preventing the deposited sediment from rolling up, and prevents the sediment from being transferred to the secondary tank from both overflow ports.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on embodiments shown in the accompanying drawings.

FIG. 1 shows a general house H provided with a domestic wastewater recycling system A according to the present invention. H1 is a bathroom, H2 is a toilet, H3 is a toilet room, and H4 is a kitchen.

A bath 1 and a washing place 10 are provided in the bathroom H1, and a shower device 2 is installed in the washing place 10,
Water used in the washing place 10, such as washing water or hot water, is discharged from the bathroom drain port 30. Although not shown, a filter for removing hair and the like is attached to the bathroom drain port 30.

A washing machine 4 and a wash basin 3 are installed in the washroom H2.
The water is discharged from the basin drain 32.

A flush toilet 5 equipped with a flush water tank 50 is installed in the toilet room H3. 33 is a sewage discharge port.

A sink 6 is installed in the kitchen H4, and water used in the sink 6 is discharged from a kitchen drain 34.

Here, the overall configuration of the domestic wastewater recycling system A according to the present embodiment will be described with reference to FIGS.

As shown in FIG. 1 and FIG. 2, the household wastewater recycling system A installed in the house H circulates bathtub water to purify and keep the water warm, and a bathtub water circulation hot water bath 8 which collects domestic wastewater. It is provided with a household wastewater purification device 9 that purifies and sends water as toilet flush water. As bath water for bathing, it can be used for a long time with a small amount of additional water, and it is discharged every day. By collecting domestic wastewater, purifying it, and sending it to the flush water tank 50 of the flush toilet 5 and using it as toilet flush water, it is possible to achieve a significant water saving in total.

The bath tub water circulation warm bath 8 and the domestic waste water purifying device 9 are installed outdoors. The purifying tank 90 of the domestic waste water purifying device 9 is buried under the ground, and the upper surface of the purifying tank 90 is provided. And a hypochlorous acid generator B for disinfecting and disinfecting domestic wastewater, an air compressor 92 as an air source for performing biological aeration treatment, and the like. And a casing is used to form a compact integrated unit U.

In FIGS. 1 and 2, reference numeral 11 denotes a bathtub water circulation passage connecting the bathtub 1 and the bathtub water circulation hot water bath 8, and is constituted by a bathtub water suction passage 11a and a bathtub water discharge passage 11b. I have.

Numeral 12 designates a domestic wastewater purifying device 9 for purifying domestic wastewater.
A water intake passage for taking in water, which communicates with the bathroom drain port 30 of the bathroom H1 and a washroom through a passage switching valve V.
It communicates with the washing machine drain port 31 of H2.

Reference numeral 13 denotes a washing water supply flow path, which connects the domestic waste water purifying device 9 to the washing water tank 50 of the flush toilet 5 and communicates with a pump P whose base end is disposed in the purification tank 90. In addition to the connection, a strainer 96 is provided in the middle of the piping.

Q is the sewer, and the sewer Q is
The drainage port 32 for the wash basin, the sewage discharge port 33 of the toilet room H3, and the drainage port 34 for the kitchen communicate with each other, and the drainage port 31 for the washing machine via the flow path switching valve V.

As can be seen from the above communication state of the flow path,
In the present embodiment, the domestic wastewater to be sent as the toilet flush water to the flush water tank 50 of the flush toilet 5 is provided in the washing place 10 of the bathroom H1.
Wastewater from the washing machine 4 is used.

In addition, only the rinse water from the washing machine 4 is drained from the washing machine 4 by switching the flow path switching valve V.

These wastewaters are less polluted than other domestic wastewaters, and have a high purification efficiency because they contain less oils.

Next, the integrated unit U will be described with reference to FIG.

As described above, the integrated unit U is provided with the bathtub water circulation hot water bath 8 and the domestic wastewater purifying device 9.

The domestic waste water purification device 9 has a purification tank 90 buried in the soil, and purifies and stores domestic waste water by the purification tank 90 and stores the waste water by the attached hypochlorous acid generator B. We are trying to sterilize and disinfect purified domestic wastewater.

The bath tub water circulation warm bath 8 accommodates a circulation pump, a flow path switching valve, a heater, a sterilizing / purifying unit, a filtration tank (not shown) and the like (not shown) in the apparatus main body. → Bath water suction flow path 11a → Circulation pump → Flow path switching valve → Heater → Sterilizer / Purification unit → Filtration tank → Flow path switching valve → Bath water discharge flow path 11b It is configured to be possible. For example, JP-A-8-24
No. 529 can be suitably used.

With the above configuration, domestic wastewater can be effectively used as toilet flush water, and a significant water saving effect can be obtained.

The feature of the present invention in the above-mentioned domestic wastewater recycling system A lies in the configuration of the purification tank 90.

That is, as shown in FIG. 2 and FIG. 3 which is an enlarged view of the purification tank 90, the purification tank 90 is a primary tank 90 serving as a processing tank for performing the purification treatment by flowing the treated water to be purified.
a and a secondary tank 90b and a storage tank 90c for storing the purified water are formed via first and second partition walls W1 and W2.

The domestic drainage inlet 12a of the intake channel 12 is made to face the primary tank 90c, and the first and second partition walls W1 and W2 are each provided with a small-diameter first wall at a certain height from the bottom. An overflow port 21 is provided, and a large-diameter second overflow port is provided above the first overflow port 21.
22 are provided, and the respective layers 90a, 90b, 90c are communicated with each other. Therefore, since the primary tank 90a and the secondary tank 90b of the processing tank communicate with each other through the first overflow port 21,
The water level in the treatment tank is usually kept constant.

In the primary tank 90a and the secondary tank 90b, a biofilm 23 for purifying microorganisms is disposed, and an aeration tube extending from the air compressor 92 is provided.
24 are open.

With this configuration, the primary tank 90 serving as a treatment layer is formed.
In the a and the secondary tank 90b, domestic wastewater can be purified by biological treatment and aeration treatment.

In the purifying tank 90, the gist of the present invention is that the sediment M deposited on the bottom made of dead microorganisms and decomposed dirt generated in the treatment layer is taken up by the inflow of domestic wastewater. That is, the sediment discharge pipe 25 for preventing the sediment from being transferred to the storage tank 90c is provided.

That is, the sediment discharge pipe 25 having the terminal end opening extended outside the system of the purification tank 90 is disposed so as to pass between the first overflow port 21 and the second overflow port 22. It is branched midway, and one end opening thereof is bent downward to be near the bottom of the primary tank 90a, and the other end opening is extended downward to be near the bottom of the secondary tank 90b.

With this configuration, the primary tank 90a
In addition, the sediment M such as decomposed dirt and dead microorganisms accumulated in the processing tank including the secondary tank 90b can be efficiently discharged out of the system.

That is, while the domestic wastewater flows into the primary tank 90a and fills the secondary tank 90b via the first overflow port 21 and the second overflow port 22, the living wastewater flows into the primary tank 90a. If a large amount of wastewater flows in at once, if the water level rises above the first overflow port 21,
The water level in the sediment discharge pipe 25 similarly rises and flows out of the system. At this time, the sediment M deposited on the bottom of the treatment tank is sucked up and discharged.

At this time, if the amount of domestic wastewater flowing into the primary tank 90a is larger than the amount of outflow from the first overflow port 21 or the sediment discharge pipe 25, the second drain provided above the first overflow port 21 is provided. (2) The water flows into the secondary tank 90b from the overflow port 22, but also in the secondary tank 90b, when the water level rises above the first overflow port 21, the water level in the sediment discharge pipe 25 similarly rises and is outside the system. As a result, the inflow of the precipitate M into the storage tank 90c can be prevented as much as possible.

Therefore, every time a large amount of domestic wastewater flows in, the sediment M is discharged out of the system, so that the sediment M is gradually reduced in the primary tank 90a and the secondary tank 90b. As a result, treated water that has been sufficiently purified is stored in the storage tank 90c, and due to the toilet flush water supplied from the storage tank 90c, the flush water tank 50c is discharged.
There is no risk of generating an offensive odor from the toilet or flush toilet 5.

Incidentally, in FIG. 3, reference numeral 26 denotes the first and second
These are water passages formed in the partition walls W1 and W2, respectively. The lower ends of the water passages are opened in the middle of the primary tank 90a and the secondary tank 90b, and the first and second overflow ports 21 and 22 are provided in the water passage 26. ing.

The provision of the water passage 26 prevents the scum and the like in the upper part of the domestic wastewater stored in the treatment tank from being transferred to the storage tank 90c during normal operation. As a result, it is possible to prevent the wound-up sediment M and the like remaining without being discharged from the sediment discharge pipe 25 from flowing out of the first and second overflow ports 21 and 22 as much as possible.

Reference numeral 27 denotes an overflow drain provided in the storage tank 90c to discharge a predetermined amount or more of treated water. In this embodiment, the overflow drain 27 is provided.
Is provided at a position slightly lower than the first overflow port 21 of the processing tank.

In this embodiment, the end of the sediment discharge pipe 25 is provided at the overflow discharge port 27 and communicates with the external sewer Q.

In this embodiment, since the second overflow port 22 is provided above the first overflow port 21, even if a large amount of domestic wastewater flows into the treatment tank, the first and second overflow ports 22 are provided. The head difference between 21 and 22 functions as a cushion for preventing the sediment M deposited on the bottom from rolling up as much as possible.

In this embodiment, a supply water tank S for supplying clean water and a flow switch 97b for detecting the water level of the storage tank 90c are provided in case of a shortage of domestic wastewater. When the flow switch 97b detects that the water level has dropped below a predetermined amount, tap water can be supplied from the makeup water tank S to the storage tank 90c. S1 is a water supply channel.

As described above, in the present embodiment, the first-stage biological aeration is performed by the primary tank 90a and the secondary tank 90b to decompose organic substances and surfactants, and overflow to the storage tank 90c for storage. Then, it is sterilized and disinfected by the hypochlorous acid generator B and sent to the flush water tank 50 of the flush toilet 5 by the pump P.
No odor is generated from the washing water tank 50.

Next, the hypochlorous acid generator B will be described.

FIG. 4 is a schematic explanatory view of the hypochlorous acid generator B, and FIG. 5 is a circuit diagram of the hypochlorous acid generator B. As shown in FIG. 4, the hypochlorous acid generator B includes an electrolytic cell 7 in which a pair of electrodes 70 and 71 are arranged, and a salt tank 73 containing a mesh-like salt bag 72. In this embodiment, salt water can be stored in the salt tank 73 at a concentration of about 35%. In addition, in order to easily replace the salt bag 72, etc., the salt tank 73 is provided with an open / close lid and the like,
The salt tank 73 is disposed at a position where the salt tank 73 can be easily handled from the outside in the integrated unit U.

A water supply path 74 is connected to the electrolytic tank 7 from the make-up water tank S via an electromagnetic on-off valve V1. Hypochlorous acid is supplied from the electrolytic tank 7 to the third tank 90c of the purification tank 90. Road 75 is extended. Reference numeral 7a denotes a gas vent passage connected to the electrolytic cell 7, and V2 denotes a solenoid valve for supplying hypochlorous acid.

Further, a salt tank water supply passage 74a is branched from the middle of the water supply passage 74 and connected to the salt tank 73 via a salt tank solenoid valve V3, and from the salt tank 73 to the water supply passage 74. Have joined.

[0071] electrodes 70 and 71 of electrolytic cell 7 is connected to the electrolysis circuit a provided with a control unit F, the electrolyte circuit a, as shown in FIG. 5, the collector T _C side and the emitter T _E side First path in which two connected transistors T, T are connected in series
a1 and the second path a2 are connected in parallel between the power supply 76 and the ground G, and electrodes 70 and 71 are connected between the two transistors T and T of each path a1 and a2; connects the transistors T, and an output side F1 of the base T _B and the control unit F of T.

With such a configuration, when a voltage is applied between the electrodes 70 and 71, the reaction described in the prior art proceeds in the electrolytic cell 7 to generate hypochlorous acid, which contains the hypochlorous acid. The aqueous solution is supplied from the hypochlorous acid supply passage 75 into the storage tank 90c of the purification tank 90 for sterilization and disinfection.

Further, in this embodiment, a resistor R for detecting current is provided between the junction point b of the first and second paths a1 and a2 of the electrolytic circuit a and the ground G, An input F2 of the control unit F is connected to a voltage detection path a3 to suppress a rush current generated in the electrodes 70 and 71 based on the detected voltage and to detect a salt concentration in the electrolytic cell 7. It is controlled to supply salt.

That is, with the above configuration, the electrode 7
The voltage flowing through the voltage detection path a3 is proportional to the voltage flowing through the voltage detection path a3, and by using this, the voltage of the voltage detection path a3 is detected. And automatically detects the decrease in the current value due to the decrease in the salt concentration and automatically replenishes the salt.

For this purpose, as shown in FIG. 5, the control unit F includes a microcomputer 77.
The input side F2 is provided with an A / D converter 78, the output side F1 is provided with a D / A converter 79, and the output side F1 is connected to each of the above-mentioned solenoid on-off valves V1, V2, V3, V4 is connected to the drive signal output line 80.

Then, the reference voltage is stored in the microcomputer 77 in advance and compared with the detected voltage of the voltage detection path a3.
If the detected value is large, the base T _{B of the} transistor T
Emitter T _E voltage is lowered, and with the waveform of the current to cushion the start as shown in FIG. 6 and gentle, it suppresses the inrush current.

At this time, in this embodiment, the detection voltage is set to A
It is coded by a / D converter 78, an output code corresponding to the input code is output, and the output code is returned to an output voltage by a D / A converter 79.

Further, when the aqueous solution itself in the electrolytic cell 7 is reduced and the electrodes 70 and 71 are exposed on the water surface, or when the salt of the electrolyte contained in the aqueous solution is reduced as the production of hypochlorous acid progresses. In this case, the value of the current flowing between the electrodes 70 and 71 also decreases, so that the detected voltage is proportional to the current value and is smaller than the set value as compared with the set value preset in the controller F. For example, the control unit F opens the electromagnetic on-off valve V1 to replenish water from the makeup water tank S into the electrolytic tank 7, or opens the electromagnetic on-off valve V3 for the salt tank to replenish water in the salt tank 73. At the same time, salt is replenished into the electrolytic cell 7 so that, for example, a constant concentration of 2,000 ppm of hypochlorous acid can be stably generated.

Then, at a set interval, the solenoid valve V2 for supplying hypochlorous acid is opened, and hypochlorous acid is supplied to the purification tank 90 for sterilization and disinfection, and the feed pipe 95 and the flush toilet 5 are supplied. To prevent the generation of unpleasant odor due to the attachment of dirt to the surface.

As described above, in the present invention, the rush current generated in the electrodes 70 and 71 is suppressed, so that
1, the adhesion of impurities is reduced, the service life can be extended, and the salt can be automatically replenished.
Hypochlorous acid can be stably generated over a long period of time.

Next, a description will be given of a method for removing only rinsing water from the washing machine 4 described above.

As shown in FIG. 7, a general household automatic washing machine first supplies water (100) and inputs a detergent.
Next, the rotor (pulsator) connected to the motor rotates to start washing (200), and then drains (300) and dehydrates (400) for a predetermined time to remove most of the detergent from clothes and the like. Then, after supplying water (500) again and performing the rinsing operation (600), the rinsing water is drained (700). The number of rinsing operations (600) at this time is appropriately determined depending on the model of the washing machine 4. Finally, dehydration (800) is performed to end a series of washing operations.

The change in the current flowing through the motor of the washing machine 4 at this time shows a peak value at the start of dehydration (400) and (800), and the load on the motor decreases as the moisture of the clothes is removed. It can be seen that the current value gradually decreases, and when dehydration is sufficient, changes (900) and (900a) show that a constant current value continues for a predetermined time.

Focusing on the features of this operation, in the present embodiment, as shown in FIG.
At the same time, a current detector 44 is attached to 43, and a drainage passage communicating from the washing machine 4 to the sewer Q is provided with a passage switching valve V for switching the passage between the sewer Q side and the intake passage 12 side. The switching valve V and the current detector 44 are connected to control means D to constitute an operation control device.

As shown in FIG. 8, the control means D includes a DC converter D1, a signal amplifier D2, an AD converter D3, a CPU D4, and a memory D5. Then, the AC current from the current detector 44 is converted into a DC voltage, which is amplified and converted into a digital signal. When a value exceeding a high-side reference value of a preset current continues for a predetermined time, the current value is changed. In addition to storing the maximum value and the minimum value, the average value is calculated, the average value decreases for a certain time or more, and then becomes a value equal to or less than a predetermined low-side fixed reference value after maintaining the fixed value. In such a case, it is determined that the washing machine 4 has shifted to the rinsing operation, and the flow path switching valve V is switched so that the rinsing water flows to the water intake flow path 12 side. Normally, the value which is equal to or less than the predetermined low-side fixed reference value is substantially zero, and in this embodiment, the flow path switching valve V is switched at this timing.

As shown in FIG. 7, the final dehydration (80
(0) is performed, a change (900a) in current value similar to the change (900) described above occurs.
Since the time t is longer than that of (900), it is determined that the rinsing operation is completed by measuring the time t, and the flow path switching valve V is switched to return the flow path to the sewer Q side. . The switching timing of the flow path switching valve V at this time is also assumed to be a time when a current value equal to or less than a predetermined low-side fixed reference value is detected.

Therefore, no matter how many times the rinsing operation is repeated, the washing machine 4 is not operated until the final dehydration (800) is performed.
Can be automatically taken into the purification tank 90 via the water intake passage 12.

As a method of taking the rinse water from the washing machine 4, the rinsing operation (600) is performed by interposing an operation of supplying water (500) immediately after a constant current value continuously changes for a predetermined time (900). Focusing on the fact that the washing machine 4 is started, for example, a water flow switch 42 is attached to a water pipe 41 connected to the washing machine 4 and the water flow switch 42 is connected to the control means D together with the above-described current detector 44.

If the water flow switch 42 is turned on after the above-mentioned change (900), it is determined that the operation has shifted to the rinsing operation, and the flow path switching valve V may be switched to the water flow path R1. .

Also in this case, when the final dehydration (800) is performed, a change (900a) similar to the above-mentioned change (900) occurs. In this case, however, the water flow switch 42 is not turned on. If the ON signal is not received within a predetermined time such as within one minute, for example, it is determined that the rinsing operation has been completed, and the flow path switching valve V is switched to return the flow path to the sewer Q side. As described above, it is possible to take only the rinsing water by such a method.

In place of the control means D, for example,
A counter switch may be attached to the washing machine 4, and the counter switch and the operation switch of the washing machine 4 may be linked to switch the flow path switching valve V to the water flow path R1 when rinsing water is drained.

[0092]

As described above, the present invention is implemented in the above-described embodiment, and has the following effects.

According to the first aspect of the present invention, the treatment tank for purifying the treated water by flowing the treated water to be purified and the storage tank for storing the treated water that has been purified are formed through partition walls. In the partition wall, a small-diameter first overflow port is provided at a position at a certain height from the bottom, and a large-diameter second overflow port is provided above the first overflow port to allow both tanks to communicate with each other. In the vicinity of the bottom of the treatment tank, a sediment discharge pipe having the other end opened outside the system is disposed so as to pass between the first overflow port and the second overflow port. When the treated water flows in, the water level in the sediment discharge pipe rises and flows out of the system.At this time, the sediment deposited at the bottom of the treatment tank is sucked up and discharged, and the sediment is deposited in the storage tank. Does not flow in and such precipitates Generation of an odor due to factors can be prevented.

According to the second aspect of the present invention, the storage tank is provided with a hypochlorous acid generator for supplying hypochlorous acid, so that in addition to the above effects, sterilization and disinfection can be performed during storage. As a result, the stored water can be effectively reused without generating an offensive odor.

According to the third aspect of the present invention, the rinsing water from the washing machine and the wastewater from the washing place in the bathroom flow into the treatment tank of the purification tank as domestic wastewater, and overflow from the treatment tank to the storage tank. While storing, the stored water is sterilized and disinfected with hypochlorous acid, and the stored water is configured to be able to be sent as toilet flushing water by the water sending means, so that the treated water flowing into the purification tank is relatively clean. As a result, it is easy to recycle water,
It has a water-saving effect.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a house provided with a domestic wastewater recycling system according to the present invention.

FIG. 2 is a conceptual explanatory diagram of the domestic wastewater recycling system.

FIG. 3 is an explanatory diagram of a purification tank.

FIG. 4 is an explanatory diagram of a hypochlorous acid generator.

FIG. 5 is a circuit diagram of the same hypochlorous acid generator.

FIG. 6 is an explanatory diagram showing a waveform of a current flowing to an electrode of the hypochlorous acid generator.

FIG. 7 is an explanatory diagram showing operation timing of a flow path switching valve.

FIG. 8 is a block diagram showing control means of the operation determining device.

[Explanation of symbols]

 A Wastewater recycling system B Hypochlorous acid generator M Precipitate W1 First partition W2 Second partition 4 Washing machine 5 Washing toilet 21 First overflow port 22 Second overflow port 25 Sediment discharge pipe 30 Bathroom drainage Mouth 31 Drain outlet for washing machine 90 Purification tank 90a Primary tank (treatment tank) 90b Secondary tank (treatment tank) 90c Treatment tank

Claims (3)

[Claims] 1. A treatment tank for carrying out purification treatment by flowing treated water to be purified, and a storage tank for storing treated water after purification are partitioned by a partition, and the partition has a predetermined height from the bottom. A first overflow port having a small diameter is provided at the position of the first overflow port, and a second overflow port having a large diameter is provided at a position above the first overflow port to connect both tanks. Further, one end is provided near the bottom of the processing tank. And a sediment discharge pipe having the other end opened to the outside of the system so as to pass between the first overflow port and the second overflow port. 2. The purification tank according to claim 1, further comprising a hypochlorous acid generator for supplying hypochlorous acid to the storage tank. 3. Rinse water from a washing machine and wastewater from a washing place in a bathroom are introduced as domestic wastewater into the treatment tank of the purification tank according to claim 1 or 2, and overflow from the treatment tank into the storage tank. A domestic wastewater recycling system characterized in that the stored water is sterilized and disinfected with hypochlorous acid, and the stored water can be supplied as toilet flushing water by a water supply means.