JPH11207374A - Treatment of domestic waste water and treating device for domestic waste water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a domestic waste water treating method giving no excessive water amt. load and org. matter load to a septic tank for sewage, stable in the quality of treated water and without generating a problem such as a malodor. SOLUTION: In the case that waste waters discharged from a toilet 3, a kitchen 4 and a bath room.lavatory.laundry 2 are made to stay respectively in waste water pits 7, 8 and 5 and the all or a part of the waste waters are purified and treated at the septic tank, the waste water discharged from the toilet 3 and the kitchen 4 are introduced to the septic tank 9 and treated there, the waste water discharged from the bath room.lavatory.laundry 2 is introduced to the septic tank 9 and treated there when an indicated value by a suspended material detecting sensor 14 provided at the waste water pit 5 for the both room.lavatory.laundry 2 is more than a prescribed value and the domestic waste waters are introduced to a storage tank 10 (are not introduced to the septic tank) and treated when the indicated value is less than the prescribed value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for treating domestic wastewater discharged from a household.

[0002]

2. Description of the Related Art FIG. 3 is a layout diagram (plan view) showing a conventional positional relationship between a drainage source (toilet 3, bathroom, washroom, washing room 2 and kitchen 4), a drainage channel and a septic tank 9 in a house 1. It is. The discharge sources of the toilet 3, the bathroom, the washroom, the laundry 2 and the kitchen 4 are drainage masses, that is, the toilet mass 7, the bathroom, washroom and laundry mass 5, and the kitchen mass 8
Is installed, each drainage mass is connected by a pipeline, and all wastewater is poured into a septic tank, purified by a septic tank 9, passed through a disinfecting cylinder 17, and disinfected by a disinfecting tank 16,
It is led to the storage tank 10. When the treated water is reused, the treated water is used as washing water for the toilet 3 via a recycling pipe 13 by a recycling pump 11 provided in a storage tank 10.

[0003]

SUMMARY OF THE INVENTION Among the discharge sources of toilets, kitchens, and bathrooms, washrooms, and laundry rooms, drainage from bathrooms,
In particular, about 200 L of warm water is discharged in a short time within about 3 minutes as the drainage discharged at once after bathing. Therefore, the septic tank at the discharge destination has a high water load and a high organic matter load, and the quality of the treated water deteriorates. Further, since all domestic wastewater including manure is treated in the septic tank, it is necessary to perform residual chlorine disinfection in consideration of discharge. Furthermore, if the stored water is not reused (for recycling or the like) for a long period of time, the stored water will rot, giving rise to a bad smell during use and giving a feeling of discomfort. An object of the present invention is to provide a domestic wastewater treatment method and a domestic wastewater treatment apparatus that do not apply an excessive load of water and organic matter to a septic tank, and that do not cause a problem such as an unpleasant odor due to stable treatment water quality.

[0004]

[Means for Solving the Problems] Toilets, kitchens and bathrooms
Among the wastewater discharged from the washroom, washing room, etc., the wastewater with low pollutant concentration is the wastewater discharged from the bathroom, washroom, laundry room, and accounts for about 50% of the total discharge in terms of water volume. I have.
Of these, it is not always necessary to treat the wastewater from the bathroom or the rinse water from the washing machine, which accounts for about 25% of the total wastewater, in the septic tank. Therefore, the present inventors have conceived of reducing the load on the septic tank without flowing the wastewater into the septic tank, and completed the present invention.

That is, according to the present invention, wastewater discharged from a toilet, a kitchen, a bathroom, a washroom, and a laundry room is retained in a wastewater mass, and all or a part of the wastewater is purified in a septic tank. Wastewater discharged from toilets and kitchens is led to a septic tank and treated there, where it is used in bathrooms, washrooms,
The wastewater discharged from the washing room is guided to the septic tank when the value indicated by the pollutant detection sensor installed in the bathroom, washroom and washing room drainage mass is equal to or greater than a predetermined value, and is processed there. If this is the case, it provides a method for treating domestic wastewater, which leads it to a storage tank (not to a septic tank).

Further, the present invention relates to a toilet, a kitchen and a bathroom.
A domestic wastewater treatment apparatus comprising a septic tank for retaining wastewater discharged from a washroom and a laundry room in a wastewater mass and purifying all or part of the wastewater, wherein the wastewater for the bathroom, the washroom, and the washroom is provided. A pollutant detection sensor is installed in the mass, and behind the drainage mass, in conjunction with the pollutant concentration indicated by the detection sensor, when the concentration is equal to or higher than a predetermined value, the drainage of the bathroom, washroom, and washing room is performed. To the septic tank, and when it is less than a predetermined value, a two-channel switching means is provided for guiding the drainage of the bathroom, washroom, and washing room to the storage tank, and the storage tank is provided with a diffuser, a filter and / or a pump. Liquid (recycling) means is provided, and the storage tank is provided with a domestic wastewater treatment device which may be inside or outside the septic tank.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a layout diagram (plan view) showing a positional relationship between a domestic wastewater treatment apparatus, a drainage source, a drainage channel and a septic tank according to one embodiment of the present invention. As shown in FIG. 1, a switching valve 6 is provided behind a bathroom, washroom, and laundry room mass 5,
The switching valve 6 is operated via the controller 15 by the pollutant concentration detection sensor 14 provided in the bathroom / wash room / wash room mass 5. The pollutant detection sensor 14 measures the turbidity in the wastewater, and when the turbidity is less than a predetermined value, the switching valve 6 switches to the inlet side of the storage tank 10 and when the turbidity is equal to or more than the predetermined value, switches to the inlet side of the purification tank 9. It has become. The predetermined value of the turbidity can be set arbitrarily, but is preferably a constant value of about 5 when measured by JIS K0102 drainage test method (turbidity: degree of turbidity of water).

FIG. 2 is a layout view (plan view) of a drainage mass for a bathroom, a washroom, and a laundry room and another switching means provided behind the drainage mass. As shown in FIG. 2, the outlet of the drainage mass 5 for the bathroom, washroom, and laundry room is divided into two paths, and each path has an on-off valve 20.
And 21 are attached. The on / off valves 20 and 21 are operated by the pollutant detection sensor 14 via the controller 15. The on-off valve 20 is opened and the on-off valve 21 is closed when the indicated value of the pollutant detection sensor 14 is less than a predetermined value, and the on-off valve 20 is closed and the on-off valve 21 is opened when the indicated value is more than a predetermined value. Is controlled.

The low-polluting water thus introduced into the storage tank 10 is used by the recycle pump 11 via the recycle pipe 13 as washing water for the toilet 3 and the like. The highly polluted waste water is introduced into the septic tank 9 and is purified by the septic tank together with the waste water from the toilet and the kitchen.
The water is sterilized at 6 and discharged from the septic tank outlet 12.

The storage tank 10 is provided with an air diffuser 18, a filter 19, and a liquid sending means for recycling (such as a pump). Aeration (aeration) by an air diffuser and circulation to a filtration device by an air lift pump are performed, and sewage purification and sewage purification are performed. The treated water can be used for toilet washing water, car washing water, garden spray water and the like. Although the storage tank 10 is installed in the septic tank 9 in FIG. 1, it may be installed outside the septic tank 9.

The contaminant detection sensor used in the present invention is not particularly limited as long as it detects a contaminant concentration. Preferred is an ultrasonic sensor. The ultrasonic sensor utilizes the relationship between the turbidity and the arrival time of the ultrasonic wave of a specific frequency. The higher the turbidity, the longer the arrival time of the ultrasonic wave. Using this relationship, the switching value of the switching valve can be set.

[0012]

According to the method for treating domestic wastewater according to the first or second aspect, since wastewater does not flow into the septic tank at one time, an excessive water load and organic matter load in the septic tank can be avoided. In addition, the quality of the treated water is stabilized and the generation of offensive odor is suppressed, so that no discomfort is given. In addition, even if the treated water is not reused for recycling for a long time, the stored water does not rot and does not generate an odor. Furthermore, a flow regulating tank is not required, and the septic tank is compact. The treated water can be reused for toilet wash water, car wash water, garden spray water, etc., contributing to resource saving. The domestic wastewater treatment apparatus of the third aspect is compact and exhibits the same effects as described above.

[Brief description of the drawings]

FIG. 1 is a layout view (plan view) showing a positional relationship among a domestic wastewater treatment apparatus, a drainage source, a drainage channel, and a septic tank according to an embodiment of the present invention.

FIG. 2 is a layout view (plan view) of a drainage mass for a bathroom, a washroom, and a laundry room, and another example of a switching valve provided behind the drainage mass.

FIG. 3 is a layout view (plan view) showing a positional relationship among a conventional drainage source, drainage channel, and septic tank.

[Explanation of symbols]

1: house 2: bathroom, washroom, laundry room 3: toilet 4: kitchen 5: bathroom, washroom, laundry room mass 6: switching valve 7: toilet mass 8: kitchen mass 9: septic tank 10: storage tank 11: Recycling pump 12: Septic tank outlet 13: Recycling pipe 14: Pollutant detection sensor 15: Controller 16: Disinfection tank 17: Disinfection cylinder 18: Air diffuser 19: Filtration device 20, 21: Open / close valve

Claims (3)

[Claims] A wastewater discharged from a toilet, a kitchen, a bathroom, a washroom, and a laundry room is retained in a drainage mass, and when all or a part of the wastewater is purified in a septic tank, the wastewater is discharged from the toilet and the kitchen. The discharged wastewater is guided to a septic tank, where it is treated, and the wastewater discharged from the bathroom, washroom, and laundry room is specified by a pollutant detection sensor installed in the drainage mass for the bathroom, washroom, and laundry room. A domestic wastewater treatment method in which the wastewater is guided to a septic tank when it is above, and treated there, and when it is less than a predetermined value, it is guided to a storage tank. 2. The method for treating domestic wastewater according to claim 1, wherein the wastewater led to the storage tank is subjected to aeration treatment. 3. A domestic wastewater treatment apparatus provided with a septic tank for retaining wastewater discharged from a toilet, a kitchen, a bathroom, a washroom, and a laundry room in a wastewater mass and purifying all or a part of the wastewater. A pollutant detection sensor is installed in the bathroom, washroom, and washroom drainage mass, and behind the drainage mass, in conjunction with the pollutant concentration indicated by the detection sensor, the concentration of which is equal to or greater than a predetermined value. In some cases, there is provided a two-channel switching means for guiding drainage from the bathroom, washroom, and laundry room to the septic tank, and when less than a predetermined value, drainage from the bathroom, washroom, and laundry room to the storage tank. A domestic wastewater treatment apparatus, wherein the storage tank is provided with a diffuser, a filter, and / or a liquid feeder.