JPH0819773A - Waste water reutilizing apparatus - Google Patents

Abstract

PURPOSE:To obtain a waste water reutilizing system capable of achieving water saving constituted so as to use the drain of tap water used in a general home and rainwater as washing water of a flash toilet. CONSTITUTION:The start end of a reutilizing passage R is connected to a drain passage Q allowing raw water such as rainwater or waste water of a home to flow out and an intake port 1 is provided to the terminal of the reutilizing passage R and a sorting means detecting the turbidity of raw water and sorting the raw water into reutilized water and non-reutilized water corresponding to the detected turbidity is provided to the reutilizing passage R.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to drainage reuse for draining clean water used in general households and for using rainwater as flush water for flush toilets to save water. It is about the system.

[0002]

2. Description of the Related Art Conventionally, there are areas where water shortage occurs every year. In such areas, tap water, such as drinking water, is used as flush water for flush toilets, water for sprinkling, car washing, etc. Without this, there is a growing awareness of saving water by using rainwater to save water.

Further, such awareness of water saving has spread not only in some areas but also nationwide. Therefore, as a rainwater utilization system, a rainwater tank is installed on a roof or the like, and a desired water flow path is appropriately formed from the tank. The number of homes that are trying to use rainwater by extending it to certain places is increasing.

[0004]

However, since the above-mentioned rainwater utilization system is intended only for rainwater, there is a problem that the amount of rainwater stored depends on the amount of rainfall.

Therefore, there are cases in which it is not possible to cope with the drought period simply by installing a rainwater tank, and in such a case, the water in the water supply is eventually used for various purposes, and the water saving effect is halved. .

Therefore, there has been a demand for a system capable of stocking sewage water that can be used for flush toilets and water sprinklers without being affected by the weather.

An object of the present invention is to provide a drainage reuse system capable of solving the above problems.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a starting end of a reuse channel is connected to a drainage channel for discharging raw water such as rainwater and domestic drainage, and an intake port is provided at the end of the reuse channel. And a recycling means for detecting the turbidity of the raw water in the recycling channel, and sorting the recycled water and the non-recycling water according to the detected turbidity. It is related to.

The present invention is also characterized by the following configurations.

(A) The above-mentioned selection means has a turbidity sensor for detecting the turbidity of the raw water, and a flow path of the raw water depending on the turbidity detected by the turbidity sensor. And a flow path switching valve.

(B) The reuse channel has a filtering means for filtering raw water, a water feeding means for sending the reused water to the water inlet side, and a storage tank for storing the reused water.

(C) The starting end of the reuse channel is connected to the drainage channel for discharging raw water such as rainwater and domestic drainage, and
A water intake is provided at the end of the reuse channel, and a first filter for filtering raw water, a turbidity sensor for detecting turbidity of raw water, and a raw water pump for pumping raw water are arranged in the reuse channel. The first filter, the turbidity sensor, and the raw water pump are installed in the raw water primary storage tank configured to store the raw water, and the raw water pump is responsive to the turbidity detected by the turbidity sensor. , A flow path switching valve for selecting the flow path of the raw water between the reuse side and the discharge side, and a pressure pump for pressure-feeding the reuse water selected for the reuse side to the water inlet side. In the pressure pump, the second filter and the sterilizing material are housed inside, and a storage tank capable of storing reused water having a certain turbidity or less selected by the turbidity sensor is connected in communication, and by the pressure pump, Recycled water in the storage tank can be supplied to the water inlet It was.

(D) The flow path switching valve and the pressure pump are
It was placed in the unit case.

(E) The turbidity sensor was placed in the unit case instead of the raw water primary storage tank.

(F) A circulation pump is attached to the above-mentioned reuse channel so that the reused water can be circulated.

(G) A plurality of faucets can be connected and connected to the water intake.

(H) The water intake port is constructed so as to communicate with at least the low tank of the flush toilet. (I) A rainwater tank for storing only rainwater is provided with the storage tank and the pressure pump via the flow path switching means. The rainwater was connected to the middle of the flow path that connects and to allow only rainwater to be supplied to the water inlet.

(E) The storage tank is constructed so as to be able to store tap water as appropriate.

[0019]

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

(First Embodiment) FIG. 1 is a conceptual explanatory view of a wastewater reuse system A according to the present invention. As shown in FIG. The starting end of the reuse flow path R is connected to the drainage flow path Q for discharging raw water such as waste water, and the intake port 1 is provided at the end of the reuse flow path R. Turbidity detected,
It is characterized by having a selecting means for selecting reusable water and non-reusable water according to the detected turbidity.

In the present embodiment, in the reuse channel R, in addition to the sorting means, a filtering means for filtering raw water, a water feeding means for sending the reused water to the water inlet 1 side, and a storage of the reused water. And a storage tank 5 that

That is, in the home, tap water used in a bathroom, a washroom or the like, or tap water used for washing, and rainwater as raw water are made to flow into the reuse channel R and the turbidity thereof is obtained. Is detected, and relatively clean raw water whose turbidity is below a certain value is selected as reused water and the storage tank 5
It is used for watering the flush toilet G, the garden or the like, or for washing the car as required.

Further, raw water having a turbidity of a certain value or more is not suitable for reuse and is drained as it is.

By the way, as the selecting means, as shown in FIG. 2, a turbidity sensor S for detecting the turbidity of the raw water and a flow path of the raw water depending on the turbidity detected by the turbidity sensor S are provided. It is composed of a flow path switching valve V for switching between the reuse side and the non-reuse side.

Here, a concrete structure of the waste water reuse system A in this embodiment will be described below with reference to FIGS.

In FIG. 1, Q is a drainage channel, and in the drainage channel Q is a rain gutter B for collecting rain falling on a roof, a bathtub C in a bathroom or the like, a drainage port D, a washroom such as a washroom. Stand E, washing machine F
The drainage port of is communicating.

Then, the drainage channel Q is reused in the reuse channel R.
The starting end of the recycle channel R is connected and the intake port 1 is provided at the end of the reuse channel R. The water intake 1 communicates with the low tank G1 of the flush toilet G. C1 is a shower device.

By the way, the intake tank 1 has the above-mentioned low tank.
In addition to G1, it is possible to connect a faucet 2 etc. for sprinkling provided outside, this is for garden sprinkling, car washing provided in the garage, etc.
It is also possible to connect a plurality of units as required.

In this case, as shown in FIG. 3, an activated carbon filtration device 9 may be provided between the water intake 1 and the faucet 2.

In this way, the recycled water is treated with the activated carbon filter 9
By purifying with water to obtain clean purified water, it is possible to use it with peace of mind without any resistance to watering plants and the like in flower beds and car washing.

Further, the raw water primary storage tank 3 is arranged so as to communicate with the reuse channel R, and the raw water primary storage tank 3 is provided.
A first filter 31 that initially filters raw water, a turbidity sensor S that detects the turbidity of the raw water, and a raw water pump P1 that pumps the raw water are housed inside.

That is, the raw water primary storage tank 3 is buried in the ground so that the raw water naturally flows from the drainage channel Q in this embodiment, and as shown in FIG. The raw water outlet 33 and the overflow port 34 are formed in a box shape.

Then, the inside is divided into two by a partition wall 35 having a large number of holes such as so-called punching metal.

In the first chamber on the side of the raw water inlet 32, the same inlet 32
The first filter 31 that connects the opening at one end is housed. The first filter 31 is formed in a tube shape with only the end portion on the raw water inlet 32 side opened, and the raw water flowing in from the raw water inlet 32 is filtered by the first filter 31 to be the raw water primary storage tank 3 It will fill up inside. The first filter 31 can be easily replaced from the raw water inlet 32 side.

On the other hand, the turbidity sensor S and the raw water pump P1 are housed in the second chamber on the side of the raw water outlet 33. 36 is the float of the raw water pump P1.

Further, the overflow port 34 is connected to the drainage flow path Q so that the raw water above the allowable level is drained from the overflow port 34 to the drainage flow path Q.

The turbidity sensor S is composed of an optical sensor consisting of a light emitting section S1 and a light receiving section S2 so that the turbidity of the raw water can be detected and is installed on the floor of the raw water primary storage tank 3.

As the turbidity sensor S, other than an optical sensor, a method of detecting turbidity by detecting electrical conductivity or liquid concentration, etc. can be considered, and the turbidity detection method is not limited at all. is not.

Further, an underwater pump is used as the raw water pump P1, and the raw water stored in the raw water primary storage tank 3 is sent to the flow path switching valve V side.

The raw water primary storage tank 3 may be installed on the ground without being buried in the ground. In that case, a self-pumping pump or the like may be used as the raw water pump.

Further, as the first filter 31, a simple one such as a hair catcher can be used instead from the viewpoint of initial filtration for filtering relatively large dust and the like.

Further, in the raw water pump P1 arranged in the raw water primary storage tank 3, a flow for separating the flow path of the raw water into a reuse side and a discharge side according to the turbidity detected by the turbidity sensor S. A passage switching valve V, a stainless steel storage tank 5 provided on the downstream side of the passage switching valve V via a selection passage forming pipe R1,
The reused water selected on the reused side is communicatively connected to a pressure feed pump P2 that pressure-feeds the reused water from the storage tank 5 to the intake port 1 side.
Reference numeral 41 is an opening / closing valve, R2 is a water supply pipe that connects the storage tank 5 and the pressure feed pump P2, and R3 is a pressure feed pipe that extends from the pressure feed pump P2 to the intake port 1.

In this embodiment, the flow path switching valve V and the pressure feed pump P2 are housed in a stainless steel unit case 4, and the unit case 4 is provided with a control section H. The control unit H is connected to the turbidity sensor S, the flow path switching valve V, and the liquid level detecting means of the storage tank 5 described later in detail.

Further, the second filter 51 and the sterilizing material are stored in the storage tank 5 so that the raw water having a certain turbidity or less selected by the turbidity sensor S can be stored as reused water for a long time. . Reference numeral 55 is an overflow pipe communicating with the drain passage Q, 56 is an air bleeding pipe, 57 is a tank lid, and 58 is a valve for draining water from the storage tank 5.

The recycle water in the storage tank 5 can be supplied to the water inlet 1 by the pressure pump P2.

A float type liquid level detector 53 is mounted in the storage tank 5 as a liquid level detecting means, and the liquid level detector 53 and the control section H are electrically connected. .

That is, when the liquid level detector 53 detects that the storage tank 5 is full of water, the control unit H switches the flow path switching valve V in the unit case 4 to the drain side to become reused water. Even raw water that can be discharged is discharged to the drainage channel Q.

The storage tank 5 is also constructed so as to communicate with the water supply 6. This is to supply the water from the water supply to cover the flush water of the flush toilet G when the predetermined amount of the recycled water is not obtained. In this embodiment, the storage tank 5 is linked with the liquid level detector 53 described above.
When the amount of reused water in the inside falls below a predetermined amount, the water is allowed to flow from the water supply 6.

Second filter housed in storage tank 5
In this embodiment, 51 is the same as the first filter 31 described above, but a larger one is housed to increase the filtration area.

As the sterilizing material, an organic solid salt material generally used in swimming pools and the like is used, and it is substantially contained in a sterilizing device 52 as shown in FIG. . The sterilizer 52 is configured by inserting a cylindrical body 52b filled with an organic solid salt material into a donut type float 52a.

The sterilizing material is not limited to the use of the organic solid salt material described above, and there is also a method of injecting sodium hypozincate, chlorine dioxide or the like.
Further, an ultraviolet sterilizer or a membrane treatment system may be adopted.

Although the unit case 4 and the storage tank 5 are made of stainless steel, they may be made of other synthetic resins.

With the above structure, in the wastewater reuse system A according to the present invention, the raw water can be sorted into the reused water and the non-reused water as described below, and the sorted reused water can be used. it can.

That is, the raw water flowing from the drainage flow path Q is pumped by the raw water pump P1 while being stored in the raw water primary storage tank 3 to an amount that can be pumped by the raw water pump P1. At this time, the flow path switching valve V in the unit case 4 normally forms a flow path on the drain side.

In the raw water primary storage tank 3, when the turbidity sensor S detects the turbidity of the raw water and a value equal to or lower than a preset specified turbidity is continuously detected for a predetermined time (for example, 5 seconds), The control unit H outputs a flow path switching signal to the flow path switching valve V, changes the flow path to the storage tank 5 side, and stores the raw water in the storage tank 5 as reused water.

In the storage tank 5, since it is filtered through the second filter 51 and sterilized with a sterilizing material,
It is fully usable except for drinking water.

Of the amount of clean water used in ordinary households,
It is known that about 65% is used for bathing, washing, and washing, and about 30% is used for flush toilets and watering.

Therefore, about 65% of the drained raw water is reused, and about 30% of flush toilets that have been conventionally disposed,
Since it can be used for watering, a great water saving effect can be obtained.

In addition, the amount of detergent used in a bathroom or washroom in a general household flows initially, and the amount of rinsing water gradually increases. Therefore, in the raw water primary storage tank 3, a comparison is made in the latter half when raw water is introduced. It is considered that raw water with low turbidity will flow in.

Therefore, the above-mentioned method of selecting the reused water and the non-reusable water according to the turbidity has a simple system configuration, and even if about 50% of the raw water is discarded, the required amount of the reused water is reduced. Since it can be secured, it can be said that it is a rational selection method. Moreover, this system A has few failures and is easy to maintain.

Normally, the standard value of the turbidity for selection is set so that about 50% of the raw water can be stored. It is also possible to store 50% or more, or almost the entire amount.

Alternatively, in order to obtain cleaner reusable water, the reference value may be set strictly. As described above, the sorting means according to the present invention has high flexibility and usability. Further, in this case, even if the amount of water to be reused is extremely reduced and the stockpiling amount of the storage tank 5 is reduced, the waterworks 6 communicates with the storage tank 5, so that the flushing toilet G is washed. There will be no problems such as the inability to supply water, and there will be no hindrance to life.

In the middle of the reuse channel R (for example, in the raw water primary storage tank 3 or the unit case 4),
A filtration device using a biofilm can be attached to further improve the purification function.

The turbidity sensor S may be installed in the unit case 4 instead of the raw water primary storage tank 3. An example of the structure of the sensor S in that case will be described in a third embodiment described later.

(Second Embodiment) The drainage reuse system A according to the present invention can also be constructed so that only rainwater can be used as reused water.

That is, when water is sprinkled on a flower bed or the like, or when it is used for car washing, only rainwater is used. This is almost the same as the basic construction shown in the first embodiment. However, as shown in FIG. 4, the rainwater tank 7 is installed in the rain gutter B.
The rainwater tank 7 and the pressure feed pump P2 in the unit case 4 are connected by a connecting pipe 71 via a rainwater opening / closing valve 72.

In such a structure, when only rainwater is used, the rainwater opening / closing valve 72 may be opened and the opening / closing valve 41 may be closed. Also, by closing the open / close valve 72 for rainwater,
When the open / close valve 41 is opened, the mixed water of the drainage from the bathroom, the washroom, etc. and the rainwater is used as in the first embodiment.

In FIG. 4, 74 is an overflow pipe for a rainwater tank, which communicates with the drainage channel Q. In addition, 75 is a sterilizer for rainwater tanks, and is a sterilizer 52 in the storage tank 5.
It has the same configuration as.

(Third Embodiment) Next, a third embodiment of the drainage reuse system A according to the present invention will be described with reference to FIG.

This is configured so that the reused water can be circulated in order to further improve the quality of the reused water in the storage tank 5, and the basic configuration is the same as that shown in the first embodiment. is there.

That is, as shown in FIG. 5, a circulation pump P3 is provided in the reuse channel R in the unit case 4 instead of the pressure feed pump P2, and a turbidity sensor S and a filtration device 8 are provided. ing.

In this embodiment, the filtration device 8 is connected in communication with the downstream side of the circulation pump P3 in the water supply pipe R2, and the filtration device 8 and the low tank G1 of the flush toilet G are connected in communication with each other by the pressure supply pipe R3. ing.

Further, the downstream side of the filtration device 8 and the middle of the selection flow path forming pipe R1 which connects the flow path switching valve V and the storage tank 5 to each other is circulated through the circulation control valve 82.
Are connected by.

The circulation control valve 82 is normally used for the storage tank 5.
The amount of inflow into the flush toilet G is controlled so as to reduce the amount of inflow into the flush toilet G side.

Further, the turbidity sensor S in this embodiment is
A part of the raw water is taken into the glass tube S3 on the upstream side of the flow path switching valve V, and the glass tube S3 is further provided with a light emitting section S1.
And a light receiving portion S2 are attached.

Instead of the glass tube S3, a cylindrical body capable of taking in part of the raw water may be attached, and the light emitting section S1 and the light receiving section S2 may be provided on the inner wall of the cylindrical body so as to face each other.

With this configuration, the reused water selected by the turbidity sensor S and the flow path switching valve V is the selection flow path forming pipe R1 → storage tank 5 → water supply unless the reused water is taken out from the water intake 1. Pipe R2 → Circulation pump P3 → Filtration device 8
→ Circulation pipe R4 → While circulating with the storage tank 5, always
It will be purified and filtered, and deterioration of the water quality of the reused water can be prevented as much as possible.

The filter device 8 has the same structure as the first filter 31 arranged in the raw water primary storage tank 3.
Alternatively, a cartridge filter type, a sand filtration type, a stainless mesh type or the like can be appropriately adopted depending on the desired water quality. Further, an ultraviolet sterilizer or the like may be incorporated in the filtering device 8.

As described above, in the wastewater reuse system A according to the present invention, among the domestic wastewater, the wastewater from the bathroom or the washroom, and the rainwater collected from the roof are turbidity sensors. S is configured to collect the reused water by separating it into reused water and non-reusable water according to the level of turbidity, so that the reused water is always stored regardless of the weather. Therefore, the flush water of the flush toilet G and the water used for sprinkling can be always secured, and a large water-saving effect of clean water can be achieved.

Further, by constructing the device as a unit such as the raw water primary storage tank 3 and the unit case 4, facility construction becomes easy.

[0081]

[Effects of the Invention] The reuse flow channel is formed by connecting the starting end of the reuse flow channel to a drainage flow channel for discharging raw water such as rainwater and domestic drainage, and providing an intake port at the end of the reuse flow channel. In, by detecting the turbidity of the raw water, by being configured to have a sorting means for sorting into recycled water and non-reusable water according to the detected turbidity,
The water used for flushing the flush toilet and the water used for sprinkling can be covered by domestic drainage, resulting in a large water saving effect. Moreover, the structure is simple, there are few failures, and maintenance is easy.

The selecting means, depending on the turbidity sensor for detecting the turbidity of the raw water and the turbidity detected by the turbidity sensor,
Since the flow path of the raw water is composed of the flow path switching valve for switching between the reuse side and the non-reuse side, the reuse water and the non-reuse water can be easily selected and the flexibility is high.

The reusable flow path has a filter means for filtering raw water, a water supply means for sending the reclaimed water to the water inlet side, and a storage tank for storing the reclaimed water.
Regardless of the weather, it is possible to store relatively clean reusable water at all times, and it is possible to always secure flush water for flush toilets and relatively clean water to be used for watering. Produce an effect.

By disposing the flow path switching valve and the pressure feed pump in the unit case, facility construction of the drainage reuse system can be facilitated.

By attaching a circulation pump to the reuse channel and making it possible to circulate the reused water, it is possible to prevent deterioration of the quality of the reused water as much as possible.

By making it possible to connect a plurality of water taps to each other, the water intake port can be provided depending on the application such as watering the garden or use in a garage, etc., and the usability is improved.

Since the water intake is configured to communicate with at least the low tank of the flush toilet, the flush water of the flush toilet, which accounts for about 30% of the amount of clean water used in a general household, can be covered by domestic drainage. Water saving effect can be obtained.

A rainwater tank that stores only rainwater is connected via the flow path switching means to the middle of the flow path that connects the storage tank and the pressure feed pump so that only rainwater can be supplied to the water inlet. As a result, it can be used for watering plants such as flower beds and car washing with peace of mind.

Since the storage tank is constructed so as to be able to properly store clean water, even if the amount of recycled water collected is extremely small, there is a shortage of wash water in the flush toilet, which may interfere with daily life. Absent.

[Brief description of drawings]

FIG. 1 is an explanatory view conceptually showing a drainage reuse system according to the present invention.

FIG. 2 is an explanatory view showing the raw water primary storage tank and the inside of a unit case.

FIG. 3 is an explanatory view showing a faucet connected to the water intake port.

FIG. 4 is an explanatory diagram showing a second embodiment.

FIG. 5 is an explanatory diagram showing a third embodiment.

[Explanation of symbols]

 A Drainage reuse system G Flush toilet G1 Low tank P1 Raw water pump P2 Pressure pump P3 Circulation pump Q Drain flow channel R Reuse flow channel S Turbidity sensor V Flow channel switching valve 1 Intake port 2 Faucet 3 Raw water primary storage tank 4 unit Case 5 Storage tank 7 Rainwater tank 31 1st filter 51 2nd filter

Claims (11)

[Claims] 1. The drainage flow path (Q) for discharging raw water such as rainwater and domestic wastewater is connected to the beginning end of the reuse flow path (R), and water is taken at the end of the reuse flow path (R). A port (1) is provided, and in the reuse channel (R), a turbidity of raw water is detected, and a sorting means for sorting the reused water and the non-recycled water according to the detected turbidity is provided. A characteristic wastewater reuse system. 2. A turbidity sensor (S) for detecting the turbidity of raw water, and the flow path of the raw water is reused depending on the turbidity detected by the turbidity sensor (S). The drainage reuse system according to claim 1, comprising a flow path switching valve (V) for switching to a non-reuse side. 3. The reuse channel (R) comprises a filtering means for filtering raw water, a water feeding means for sending the recycled water to the water inlet (1) side, and a storage tank (5) for storing the recycled water. The drainage reuse system according to claim 1 or 2, further comprising: 4. The reuse flow channel (R) is connected at its start end to the drainage flow channel (Q) for discharging raw water such as rainwater and domestic drainage, and water is taken at the end of the reuse flow channel (R). A first filter that filters raw water in the reuse channel (R) with a mouth (1).
(31), a turbidity sensor (S) for detecting the turbidity of raw water, and a raw water pump (P1) for pumping the raw water together with the first filter (31) and the turbidity sensor (S). The raw water pump (P1) and the raw water pump (P1) are stored in a raw water primary storage tank (3) configured to store the raw water, and the raw water pump (P1) is stored in the raw water pump (P1) according to the turbidity detected by the turbidity sensor (S). , A flow path switching valve (V) that separates the raw water flow path into the reuse side and the discharge side, and a pressure pump (P2) that pressure-feeds the reused water that has been selected to the reuse side to the water inlet (1) side , And the second filter inside the pressure pump (P2).
(51) and a sterilizing material are stored, a storage tank (5) capable of storing reused water having a certain turbidity or less selected by the turbidity sensor (S) is connected and connected, and the pressure pump (P1 )), The reused water in the storage tank (5) can be supplied to the water inlet (1). 5. The drainage reuse system according to claim 4, wherein the flow path switching valve (V) and the pressure feed pump (P2) are arranged in a unit case (4). 6. The raw water primary storage tank comprising the turbidity sensor (S)
The drainage reuse system according to claim 4 or 5, wherein the wastewater reuse system is arranged in a unit case (4) instead of (3). 7. The wastewater reuse according to any one of claims 1 to 6, wherein a circulation pump (P3) is attached to the reuse channel (R) so that the reused water can be circulated. system. 8. The drainage reuse system according to any one of claims 1 to 7, wherein the water intake port (1) allows a plurality of faucets (2) to communicate with each other. 9. The drainage recycle system according to claim 1, wherein the water intake port (1) is configured to communicate with at least the low tank (G1) of the flush toilet (G). Utilization system. 10. A rainwater tank (7) for storing only rainwater
, Via the flow path switching means, the storage tank (5) and the pressure feed pump (P2) is connected to the middle of the flow path connecting and connecting,
The drainage reuse system according to any one of claims 4 to 9, wherein only rainwater can be supplied to the water inlet (1). 11. The drainage reuse system according to any one of claims 1 to 10, wherein the storage tank (5) is configured to be capable of appropriately storing tap water.