JPH06238288A - Reclaimed water device - Google Patents

Abstract

PURPOSE:To provide a reclaimed water device capable of supplying water of such quality as to satisfy reclaimed water standards adequately and in stable quantity at low cost. CONSTITUTION:The subject reclaimed water device is composed of a multi- sourced drainage storage tank 9, filled with filtration materials which receives multi-sourced drainage 18, a rain water storage tank 13 which receives rain water 19, a bioreactor 10, consisting of a bioreaction part 32 and a filtration part 33, which receives untreated water from the multi-sourced drainage storage tank 9 and the rain water storage tank 13 using constant volume pump 2, 1 and treats the water, a reclaimed water storage tank 12 which stores treated water from the bioreactor 10, a reclaimed water feed pump 5 which feeds reclaimed water from the reclaimed water storage tank 12, and a sterilization device 4 which sterilizes the reclaimed water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gray water device for producing gray water from wastewater and rainwater.

[0002]

2. Description of the Related Art Conventional gray water systems, especially large-scale water plants installed in buildings, etc.
Most of them are subjected to filtration, activated carbon treatment or membrane treatment, and reused as toilet wash water. Further, as shown in Japanese Utility Model Publication No. 3-72966, only rainwater is stored and used as medium water for small household use. Further, as disclosed in Japanese Patent Laid-Open No. 63-251532, there is also one that utilizes rainwater and gray water as intermediate water only by storing them.

[0003]

However, since the large-scaled sewage system installed in a building or the like contains human waste, it is subjected to biological treatment, followed by filtration, activated carbon or membrane treatment. Therefore, although the construction cost is high, the reuse rate is low at 25% because it is used only for toilet flush water.

Further, the one disclosed in Japanese Utility Model Laid-Open No. 3-72966 uses only rainwater as reservoir water. Therefore, when there is little rain such as in winter, there will be a shortage of water and supplementary equipment for water supply will be required. In addition, recently, there is a lot of acid rain, so that the materials of piping parts are limited.

Further, the one disclosed in Japanese Patent Laid-Open No. 63-251532 uses rainwater and residual hot water in a bathtub as reclaimed water in order to eliminate the lack of reclaimed water. Therefore, contaminants such as hair in the residual hot water in the bathtub block the intermediate water pump, which causes a failure. In addition, there are many organic substances in the remaining hot water in the bathtub, and bacteria are propagated only by storing the water, which is not suitable for use as toilet wash water.

An object of the present invention is to provide, at a low cost, a gray water device which can secure a water quality that satisfies the gray water standard and a stable amount of water.

[0007]

The structure of the present invention for achieving the above object will be described with reference to FIG. 1 corresponding to the embodiment. In the present invention, the filter medium 22 is filled and the waste water 18 is introduced. A wastewater storage tank 9 to be used, a rainwater storage tank 13 to which rainwater 19 is introduced, a wastewater storage tank 9, and a biological reaction unit 32 that introduces and treats raw water from the rainwater storage tank 13 by means of quantitative pumps 2 and 1, and Bioreactor 10 Comprising Filtering Section 33
And a means for disposing the intermediate water storage tank 12 for storing the treated water from the bioreactor 10, the intermediate water supply pump 5 for supplying the intermediate water of the intermediate water storage tank 12, and the sterilizer 4 for sterilizing the intermediate water. I am taking it.

According to the present invention, the miscellaneous waste water is used as intermediate water, and rain water is used as a supplement. In order to remove impurities in the gray water, a gray water storage tank filled with a filter medium is provided as a pretreatment unit. Further, in the bioreactor section of the bioreactor, the wastewater and rainwater are also subjected to biological treatment to remove organic matter, maintain the PH in the neutral range, and further remove suspended substances in the filter section provided below the bioreactor section.
Then, the gray water treated in the bioreactor is temporarily stored in the gray water storage tank, pumped by the gray water supply pump at the time of use, added with a sterilizing agent in the middle pipe, and stored in the low tank of the toilet.

[0009]

According to the present invention, the wastewater flows into the wastewater storage tank by the above-mentioned means, and the contaminants in the wastewater are removed by the filter medium filled inside. Rainwater from the wastewater or rainwater storage tank from which contaminants have been removed flows into the bioreactor section of the bioreactor, and the neutralization of the neutral region due to the oxidative decomposition of organic matter in the wastewater and rainwater and the buffering action associated with the bioreaction. It is maintained and then flows into the filtration section to remove suspended solids. The sterilant is
Used for sterilization of bacteria in bioreactor treated water.

[0010]

An embodiment of the present invention will be described below with reference to FIG. The gray water 18 flows into the gray water storage tank 9 and
Contaminants in the wastewater are removed by the filter medium 22 filled in the wastewater, and the wastewater is discharged from the bioreactor 1 by the sewage supply pump 2.
0 to the bioreaction part 32. The dirty water supply pump 2 is operated when the level switch 24 is activated. The gray water supplied to the bioreaction part 32 is diffused by a diffuser blower 7 provided at the bottom of the bioreaction part 32, oxidatively decomposed, and then suspended substances are removed by a lower filtration part 33. In the filtering unit 33, the backwash blower 8 periodically backwashes. During the backwashing, the backwashing air lift pump 30 is operated, and the backwashing water is drawn out from the boundary between the biological reaction section 32 and the filtering section 33 and returned to the gray water storage tank 9. The treated water that has passed through the filtration unit 33 is the backwash water tank 1.
After being stored in 1, the water is transferred to the intermediate water storage tank 12 and reused as intermediate water.

The rainwater 19 is supplied from the rainwater storage tank 13 to the bioreactor 32 of the bioreactor 10 by the rainwater supply pump 1, treated in the same manner as the gray water 18, and reused as waste water. The rainwater supply pump 1 is operated when the operating state of the level switch 27 and the 12 level switches 26 of the intermediate water storage tank are not at the high water level. This is because gray water is given priority as a system for utilizing gray water, and rainwater is used as a supplementary facility. The sludge pump 14 installed in the rainwater storage tank 13 is used to regularly discharge sludge such as earth and sand in rainwater to the gutter 21.

The intermediate water stored in the intermediate water storage tank 12 is supplied to the low tank 17 of the toilet by the intermediate water supply pump 5. The level switch 25 of the intermediate water supply pump 5 is operated, and the sterilizing agent is injected from the sterilizing tank into the pipe by the sterilizing agent supplying pump 3 during water supply. Water transfer is confirmed by the flow switch.

Each of the water tanks is provided with a waste water storage tank overflow 15, a rainwater storage tank overflow 16, and a medium water storage tank overflow 23. The intermediate water storage tank 12 is also provided with a clean water 29 supply pipe.

Table 1 shows the quality of treated water when the gray water system of the present invention is operated. As shown in Table 1, the toilet wash water satisfies the sufficient medium water standard.

[0015]

[Table 1]

[0016]

INDUSTRIAL APPLICABILITY According to the present invention, the wastewater 1 filled with the filter medium 22
8 into which the miscellaneous wastewater storage tank 9 is introduced, rainwater 19 into which the rainwater storage tank 13 is introduced, miscellaneous wastewater storage tank 9, and rainwater storage tank 13
A bioreactor 10 including a bioreaction part 32 and a filtration part 33 for introducing and treating raw water from the biogas with a metering pump 2, 1, a medium water storage tank 12 for storing the treated water from the bioreactor 10, and a medium water storage tank. Since it is composed of the intermediate water supply pump 5 for supplying intermediate water 12 and the sterilizer 4 for sterilizing intermediate water, it is possible to secure a water quality and a stable amount of water that sufficiently satisfy the intermediate water standard and is inexpensive. The present invention has the effect of being able to provide a simple water refilling device.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a gray water device of the present invention.

[Explanation of symbols]

1. Rainwater supply pump 2. Sewage supply pump 3. Sterilizer supply pump 4. Sterilizer tank 5. Middle water supply pump 6. Flow switch 7. Aeration blower 8. Backwash blower 9. Miscellaneous wastewater storage tank 10. Bioreactor 11. Backwash water tank 12. Medium water storage tank 13. Rainwater storage tank 13. Sludge pump 15. Overflow of waste water storage tank 16. Rainwater storage tank overflow 17. Toilet low tank 18. Miscellaneous wastewater 19. Rainwater 20. Sludge such as earth and sand 21. Gutter 22. Filter material 23. Medium water storage tank overflow 24. Level switch 25. Level switch 26. Level switch 27. Level switch 28. Level switch 29. Water supply 30. Backwash air lift pump 31. Backwash water 32. Biological reaction part 33. Filtering section

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number for FI Technical location C02F 9/00 ZAB A 7446-4D E03B 3/02 9022-2D (72) Inventor Nobuyoshi Katagai Ibaraki Prefecture Shimodate City 1250 Shimoeren, Hitachi Chemical Co., Ltd.Yuki Plant (72) Inventor Yasato Wada 1250 Shimoeden, Shimodate City, Ibaraki Prefecture Yuka Plant, Hitachi Chemical Co., Ltd.

Claims (1)

[Claims] 1. A miscellaneous waste water storage tank 9 in which a filter medium 22 is filled and a miscellaneous waste water 18 is introduced, a rainwater storage tank 13 in which rainwater 19 is introduced, a miscellaneous wastewater storage tank 9, and raw water from the rainwater storage tank 13. A bioreactor 10 including a bioreaction part 32 and a filtration part 33 that are introduced and treated by the metering pumps 2 and 1, and a middle water storage tank 1 that stores treated water from the bioreactor 10.
2. A medium water supply device comprising: 2, a medium water supply pump 5 for supplying the medium water of the medium water storage tank 12, and a sterilizer 4 for sterilizing the medium water.