JP2001232363A - Waste water recycling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waste water recycling system by which waste water is recycled by cleaning the waste water from various facilities into fresh water as drinking water and the consumption of city water is drastically decreased. SOLUTION: A pump water tank 5, a reverse-osmosis membrane water cleaner 6, a water storage tank 7 or a clean water storage tank 1 are provided on the waste water-side of the equipment such as a solid-liquid separator 3, a garbage disspitator 4 for treating waste water such as sewage from garbage to constitute the system. The impure water in the clean water cleaned by the reverse-osmosis membrane water cleaner 6 is temporarily stored in the tank 7 and used as service water, and the clean water is returned to the storage tank 1 and used as the clean water for various facilities H1 to H3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the production of raw materials discharged from bathrooms, washrooms, kitchens, toilets, etc. of facilities such as government buildings, food factories, hotels, restaurants, hospitals and multi-storey buildings, and various facilities having lunch facilities. The present invention relates to a wastewater (sewage) recycling system including garbage and the like.

[0002]

2. Description of the Related Art Generally, in an apartment building H as shown in FIG.
Is instantaneously crushed by a disposer installed in the sewage tank, and sent to a solid-liquid separator 3 through a pump water tank 2 through a drain pipe D as liquid sewage together with tap water to be discharged. The water and moisture are separated, and solids such as minute solids and fats and oils are sent to the garbage elimination device 4 as garbage for biotreatment. In addition, miscellaneous drainage from bathrooms and toilets and sewage from toilets are similarly treated, and once treated as sewage by the grease trap 11, and then discharged to the sewer 9 (for example, Kaihei 6-245
No. 04).

[0003]

However, in such a conventional domestic wastewater treatment system, as described above, domestic wastewater containing garbage is passed through a pipe from a disposer disposed in a kitchen to a solid-liquid separator and a raw wastewater. After being treated by the garbage annihilator, it was discharged to the sewer as wastewater.
During the discharge, a large amount of tap water was required. For example, to process 160 kg / hour of garbage, about 20 kg
When liters / minute of tap water was required and used for 2 hours a day, as much as 2,400 liters of tap water was used. Therefore, the running cost of the wastewater treatment system was large.

In view of the above-mentioned problems of the conventional system and the fact that the treated water can be discharged to the sewer, the wastewater recycling system of the present invention removes sewage containing garbage discharged from facilities such as collective buildings. The solid and liquid are separated into solids and water by a solid-liquid separator, and the solids are processed by a garbage annihilation device. On the other hand, the water is precipitated and purified in a pump water tank provided at the lower part of the garbage annihilation device. Separate the oil with a strap and sediment, etc., which has not been removed,
Further purify. Then, the water collected at that time is purified by a reverse osmosis membrane water purification device, chlorine or the like is put into the purified water, stored in drinking water storage tanks as drinking water, and the drinking water is circulated to a water supply system such as a collective building. The purpose is to recycle wastewater. As a result, effective use of water resources can be achieved, and the running cost of the entire wastewater treatment system can be reduced.

[0005]

A waste water recycling system according to the present invention comprises a pump water tank on the drain side of a waste water treatment facility for garbage and sewage, such as a solid-liquid separator and a garbage elimination device, in a facility.
Reverse osmosis membrane water purifier and water storage tank are sequentially arranged,
The purified water purified by the reverse osmosis membrane water purifier is returned to the water storage tank as pure water and used as a water supply source.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a waste water recycling system according to the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 4, the first embodiment, which is the basic configuration of the wastewater recycling system of the present invention, is mainly used for facilities such as government buildings, food factories, hotels, restaurants and the like. The garbage discharged from these facilities H1 is pulverized by a disposer, and gray water from bathrooms, washing water, toilet sewage, rain gutters, etc. is converted into garbage and sewage by an automatic transport device. The water is once collected in a pump water tank 2 functioning as a built-in adjustment tank. The sewage containing garbage from the pump water tank 2 is sent to a solid-liquid separator 3 having a fine-grained screen therein to be separated into solids and moisture, and the separated solids are garbage as garbage. It is configured to be bioprocessed by the annihilation device 4 to be annihilated or to be converted into a feed / compost by a feed / composting device.

The water separated by the solid-liquid separator 3 is sent to the grease trap 11 as sewage to separate oil in the sewage, and then sent to a pump water tank 5 for purification by a reverse osmosis membrane water purifier. Sent to 6. Pump water tank 5
The sewage overflowing from the facility flows into the septic tank 8 and the sewer 9 as overflow water and is discharged out of the facility.

[0009] Of the water purified by the reverse osmosis membrane water purifier 6, pure water is thrown into chlorine or the like for drinking, and then temporarily stored in the water storage tank 1, and together with the public water supply, the facility H1 is supplied to the facility H1. Used as a water source.

On the other hand, the unpurified unpurified water from the reverse osmosis membrane water purification device 6 is stored in a water storage tank 7 and is supplied to the facility H.
1 It is configured to be sent to places other than the kitchen and to a disposer to be used as water, as well as water for fire prevention and car washing, and water for spraying fields, flower beds, and plants.

FIG. 2 shows a second embodiment of the wastewater recycling system according to the present invention. This embodiment is mainly used for hospital-related facilities H2. The difference between the second embodiment and the first embodiment of the present invention shown in FIG. 1 is that the pure water from the reverse osmosis membrane water purification device 6 is sterilized by an ultraviolet treatment device equipped with a UV filter. It is configured to be used as a disinfectant after ozone or the like is injected. In the second embodiment, the pure water from the reverse osmosis membrane water purification device 6 does not return to the water storage tank 1, and the water storage tank 1 is supplied with water only from the public water supply.

FIG. 3 shows a third embodiment of the wastewater recycling system according to the present invention. This embodiment is mainly used for a facility H3 such as a multi-storey building such as a middle-to-high-rise apartment building, a housing complex, and a community plant. This embodiment is different from the above-described first embodiment of the present invention shown in FIG. 1 in that the pure water from the reverse osmosis membrane water purification device 6 is temporarily stored in a water storage tank 7 and sent to the clean water storage tank 1. The facility H3 is used as clean water, and is configured to return impure water to the pump water tank 5.

The reverse osmosis membrane water purification device 6 used in the wastewater recycling system of the present invention is, as shown in FIG.
A casing 6 having an inlet 61 for purified water, an outlet 63 for purified pure water, and an outlet 62 for non-purified impure water.
0 and a reverse osmosis membrane 64 having a number of ultra-fine holes 64A of about 0.0001 micron disposed in the casing 60.
It is composed of The purified water is purified while passing through a reverse osmosis membrane 64 that is pressurized by a pump, is discharged as pure water from an outlet 63, and is stored in the tap water storage tank 1.
The unpurified water that has not been purified is discharged from the outlet 62 and sent to the water storage tank 7. This reverse osmosis membrane water purification device 6 removes harmful pollutants and bacteria contained in the wastewater, and is suitable for drinking.

According to the analysis of the inventors, as shown in Table 1, this reverse osmosis membrane water purifier 6 removes harmful pollutants from waste water, and the measured value is much lower than the reference value. Have been.

Further, the grease strap 11 shown in FIG.
As shown in FIG. 6, a pump water tank 5 arranged downstream of the apparatus and upstream of the reverse osmosis membrane purification device 6 is housed in a drawer in which a plurality of fir (rice hull) layers 5a are vertically arranged in multiple stages. And has a function of removing and purifying minute substances in the sewage not removed by the solid-liquid separator 3 and the grease trap 11. After use, the firgrass layer 5a that has become dirty and has a reduced purification ability can be taken out of the drawer and replaced as appropriate. Here, the dirty used firgrass can be put into the garbage elimination device 4 and completely eliminated.

Here, the piping system of the first embodiment (see FIG. 1) of the wastewater recycling system of the present invention will be described. As shown in the piping system diagram of FIG. 7, the washing machine disposed in the facility H1 L, toilet T, kitchen K, lavatory W, bathroom B, garbage, miscellaneous wastewater, sewage, etc. are once collected in a pump water tank 2 via piping, and pump P1 (turned on by a float switch of pump water tank 2). The wastewater is sent to the solid-liquid separator 3 or the garbage decontamination device 4 to be treated, and the sewage is sent to the grease trap 11.
Sent to The sewage in the pump water tank 5 is further pump P
2 (turned on by the float switch of the pump water tank 5), the water is sent to the reverse osmosis membrane water purifier 6 and purified, and pure water is turned on by the pump P3 (the float switch of the water storage tank 1) through the chlorine mixer 6A. ), The impure water is sent to the water storage tank 1 by the pump 4 (turned on by the float switch of the water storage tank 7). Here, overflow water overflowing from the pump water tank 5 is drained to the sewer 9 via the purification tank 8.

[0017]

[Table 1]

Next, the operation of the wastewater recycling system of the present invention will be described with reference to FIGS.

First, the garbage from the kitchen K disposed in the facility H1 is crushed by a disposer once installed in the kitchen K and collected in the pump water tank 2 via the drain pipe in a liquid state together with the drainage of tap water. Similarly, miscellaneous drainage from the washroom W, the bathroom B, the washing machine L and sewage from the toilet T are collected in the pump tub 2. The liquid garbage, sewage, and rainwater from the rain gutter on the roof of the building collected in the pump water tank 2 are sent to the solid-liquid separator 3, where solid matter and moisture are separated and pulverized. The collected garbage, minute solids such as undigested matter, fats and oils, etc. are collected from the sewage and separated into a garbage eliminating device 4 or a feed composting device (not shown). The garbage elimination device 4 decomposes garbage by bioprocessing using fermentation bacteria or the like, and completely eliminates the garbage. In addition, raw garbage can be collected here for feed and composting.

Next, the sewage from the solid-liquid separator 3 is shown in FIG.
In addition to sedimentation of the garbage and the like that has been treated by the grease trap 11 and not collected in the previous step, the fats and oils in the wastewater are separated and collected. The sewage purified to some extent by the grease strap 11 is sent to the pump water tank 5 to further remove and purify fine substances, and then sent to the reverse osmosis membrane water purification device 6 as purified water. When the water purification capacity of the device 6 is exceeded, as shown in FIG.
Overflow into the water purification tank 8 or the sewer 9.

In the reverse osmosis membrane water purifier 6, the sewage is subjected to a pump pressure to pass through a reverse osmosis membrane 64 (see FIG. 5) to purify the water, to remove impurities and to be used as drinking water. Here, of the purified water, the unpurified water that has not been purified is sent to the water storage tank 7. Further, the impure water stored in the water storage tank 7 is appropriately used when garbage is crushed by a disposer in the kitchen K, or used as water for fire prevention, car washing, and water sprinkling. The overflow water from the water storage tank 7 is returned to the pump water tank 5. Pure water from the reverse osmosis membrane water purifier 6 can be used as disinfecting water for hospitals by adding chlorine or maltstone as necessary to make it suitable for drinking, or adding ozone or sterilizing with an ultraviolet ray device. It can be so. The pure water is sent to the water storage tank 1 and used as the water for the facility H1.

[0022]

According to the wastewater recycling system of the present invention, a pump water tank, a reverse osmosis membrane water purification device and a water storage tank or a clean water storage tank are sequentially arranged at the most downstream of the conventional wastewater treatment equipment, so that it is extremely simple. Drainage at low cost (sewage)
Can be converted to fresh water and recycled as drinking water.Furthermore, emergency drinking water and fire prevention water for facilities such as collective buildings can be secured, and running water for drainage systems can be significantly reduced by reducing the consumption of tap water. Can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a flowchart of a first embodiment of a wastewater recycling system of the present invention.

FIG. 2 is a flowchart of a wastewater recycling system according to a second embodiment of the present invention.

FIG. 3 is a flowchart of a waste water recycling system according to a third embodiment of the present invention.

FIG. 4 is a conceptual configuration diagram of a first embodiment of the wastewater recycling system shown in FIG. 1;

FIG. 5 is a conceptual configuration diagram of a reverse osmosis membrane water purification device used in the wastewater recycling system of the present invention shown in FIG.

FIG. 6 is a conceptual configuration diagram of a pump water tank used in the wastewater recycling system of the present invention shown in FIG.

FIG. 7 is a piping diagram of the wastewater recycling system of the present invention shown in FIG.

FIG. 8 is a conceptual configuration diagram of a conventional wastewater treatment system for a facility such as a collective building.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tap water storage tank 2 Pump water tank 3 Solid-liquid separator 4 Garbage eliminating device 5 Pump water tank 6 Reverse osmosis membrane water purification device 7 Water storage tank 8 Purification tank 9 Sewerage 11 Grease strap H1-H3 Facility B Bathroom W Washroom K Kitchen T Toilet L washing machine

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 9/00 502 C02F 9/00 502F 502N 503 503F 504 504E F-term (Reference) 4D006 GA03 KB04 KB14 PA02 PB08 4D019 AA03 BA12 BB14 4D037 AA11 AB03 BA18 CA02 CA03 CA12

Claims (4)

[Claims] 1. A pump water tank and a reverse osmosis membrane water purifier are sequentially disposed on the drainage side of a wastewater treatment facility of a facility, and pure water of purified water purified by the reverse osmosis water purifier is returned to a tap water storage tank. A wastewater recycling system, wherein the wastewater is used as a water supply source, and of which purified water purified by the reverse osmosis membrane water purification device is returned to a storage tank and used as other water. 2. A pump water tank and a reverse osmosis membrane water purifier are sequentially disposed on the drainage side of the wastewater treatment facility of the facility, and purified water purified by the reverse osmosis membrane water purifier is sent to an ultraviolet treatment apparatus for sterilization. A wastewater recycle system, wherein the purified water purified by the reverse osmosis membrane water purification device is returned to a water storage tank and used as other water. 3. A pump water tank and a reverse osmosis membrane water purifier are sequentially disposed on the drainage side of the wastewater treatment equipment of the facility, and pure water of purified water purified by the reverse osmosis membrane water purifier is sent to a water storage tank to supply a water supply source. A wastewater recycling system, wherein the purified water purified by the reverse osmosis membrane water purification device is returned to the pump water tank. 4. The wastewater recycling system according to claim 1, wherein a plurality of firgrass layers are disposed in the pump water tank so as to be vertically exchangeable in multiple stages.