Grey water treatment system
By designing a greywater treatment system, decentralized treatment of greywater and reuse of greywater are achieved, solving the problems of water waste and municipal sewage treatment pressure, reducing costs, and making it suitable for greywater treatment in individual buildings and public restrooms.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO GREENSUM ECOLOGY CO LTD
- Filing Date
- 2025-03-20
- Publication Date
- 2026-04-28
AI Technical Summary
In existing technologies, greywater is not effectively utilized, resulting in water waste and high pressure on municipal sewage treatment systems. Centralized treatment and reuse of greywater is costly and difficult to promote on a large scale.
Design a greywater treatment system to collect and treat greywater into greywater, including basket filtration, flotation machine, ozone catalysis device, etc., for decentralized treatment in individual buildings or public toilets, reducing the pressure on municipal sewage treatment and meeting daily toilet flushing needs.
Decentralized treatment of greywater reduces the pressure on municipal wastewater treatment, saves water resources, lowers the cost of greywater reuse, and the equipment is simple, reliable, and suitable for small-scale applications.
Smart Images

Figure CN224172606U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of toilet greywater treatment, and in particular relates to a greywater treatment system. Background Technology
[0002] Grey water refers to wastewater with relatively low pollution levels, including wastewater from washbasins, showers, mop sinks, and laundry, all of which are relatively clean. 50%-80% of household wastewater is grey water, which is typically discharged directly into sewage pipes, putting immense pressure on municipal wastewater treatment systems and wasting water resources. While some areas have implemented centralized collection and treatment of grey water, using the treated water for toilet flushing, this method is costly and has not been widely adopted.
[0003] To reduce water waste, alleviate pressure on municipal wastewater treatment systems, and lower the cost of water reuse in greywater treatment. Utility Model Content
[0004] This invention addresses the aforementioned technical problems by proposing a greywater treatment system that collects greywater in a dispersed manner, treats it into greywater, and then uses it for toilet flushing or irrigation.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a grey water treatment system, comprising: at least one washbasin and / or mop sink, a grey water tank connected to the outlet of the washbasin and / or mop sink via a drain pipe, a filter basket installed in the grey water tank to filter the water flowing into the washbasin and / or mop sink, a grey water pump connected to the grey water tank, a filter connected to the outlet of the grey water pump, a pressure sensor B and a pressure gauge connected to the top of the filter, an air flotation machine connected to the filter, an ozone catalytic device connected to the air flotation machine, and a grey water tank supply system connected to the ozone catalytic device.
[0006] Preferably, the ozone catalytic device includes an ozone catalytic chamber with an exhaust port connected to an exhaust pipe. A liquid level switch is provided at the bottom of the ozone catalytic chamber, and an overflow port is provided at the top of the ozone catalytic chamber. An overflow pipe is connected to the overflow port, and an electric valve is provided on the overflow pipe.
[0007] Preferably, a liquid level alarm switch and an overflow pipe B are installed at the highest point of the grey water tank, and liquid level sensors B are installed at different heights of the grey water tank.
[0008] Preferably, the air flotation method of the air flotation machine adopts a self-circulation method.
[0009] Preferably, the flotation machine has a flotation tank, which is divided into a flotation zone and a slag discharge zone by a partition. A scraper is installed above the flotation zone to scrape the slag generated during the flotation process to the slag discharge zone. A high liquid level switch and a low liquid level switch are installed in the flotation zone. The slag is discharged through the slag discharge port at the bottom of the slag discharge zone.
[0010] Preferably, the water supply system includes a water tank, a water pump connected to the water tank, and a pressure tank A connected to the outlet of the water pump. The pressure tank A is connected to the water supply pipe of the toilet.
[0011] Preferably, a liquid level sensor A is installed at different heights of the intermediate water tank, an overflow pipe A is installed at the top of the intermediate water tank, and a clean water inlet and a water supply valve are installed at the bottom of the intermediate water tank.
[0012] Preferably, it also includes a clean water tank supply system, which has a clean water tank, and an overflow vent and a water inlet are provided on the clean water tank. The overflow vent and the water inlet are located at the upper part of the clean water tank, and a clean water pump is connected to the lower part of the clean water tank. A pressure tank B and a pressure sensor C are connected to the water outlet pipe of the clean water pump, and the water outlet pipe is connected to a washbasin and a mop sink.
[0013] Preferably, liquid level sensors C are installed at different heights in the clean water tank, and the liquid level in the clean water tank is indicated by liquid level indicator lights installed on the clean water tank.
[0014] Compared with existing technologies, the advantages and positive effects of this utility model are as follows: by selecting greywater with lower pollution for treatment (not for treating fecal waste or kitchen sewage), the centralized greywater treatment is decentralized into a decentralized greywater treatment, with individual buildings, public toilets, hotels, and farm households as units, thus moving the treatment process forward, thereby reducing the pressure on municipal sewage treatment, sharing the pressure on centralized greywater treatment, reducing water consumption, saving water resources, and the greywater treatment equipment is simple, reliable, and low in cost, and the amount of greywater treated can basically meet the daily toilet flushing needs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the greywater treatment system of this utility model;
[0016] Figure 2 This is a schematic diagram of the ozone catalytic converter of this utility model;
[0017] Figure 3 This is a schematic diagram of the water supply system of the clean water tank of this utility model. Detailed Implementation
[0018] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.
[0019] A greywater treatment system, such as Figure 1-3 As shown, it includes: at least one washbasin 6 and / or mop sink 5, a grey water tank 45 connected to the water outlet of the washbasin 6 and / or mop sink 5 through a drain pipe, a filter basket 42 installed in the grey water tank 45 to filter the water flowing into the washbasin 6 and / or mop sink 5, a liquid level alarm switch 41 and an overflow pipe B43 installed at the highest point of the grey water tank 45, and liquid level sensors B44 installed at different heights of the grey water tank 45 respectively;
[0020] A grey water pump 47 is connected to the grey water tank 46. A filter 48 is connected to the outlet of the grey water pump 47. A pressure sensor B44 and a pressure gauge 49 are connected to the top of the filter 48.
[0021] A flotation machine 19 is connected to the filter 48. The flotation method of the flotation machine 19 adopts a self-circulation method. The flotation machine 19 has a flotation tank, which is divided into a flotation zone and a sludge discharge zone by a partition 12. A scraper 11 is installed above the flotation zone to scrape the sludge generated during the flotation process to the sludge discharge zone. A high liquid level switch 14 and a low liquid level switch 18 are installed in the flotation zone. The sludge is discharged through the sludge discharge port 13 at the bottom of the sludge discharge zone.
[0022] An ozone catalytic device 2 is connected to the air flotation machine 19. The ozone catalytic device 2 has an ozone catalytic box 29. The ozone catalytic box 29 is provided with an exhaust port 21, which is connected to an exhaust pipe. A liquid level switch 24 is provided at the bottom of the ozone catalytic box 29. An overflow port is provided at the top of the ozone catalytic box 29. An overflow pipe is connected to the overflow port, and an electric valve is provided on the overflow pipe.
[0023] It also includes a water supply system 3 for a medium-water tank connected to the ozone catalytic device 2. The water supply system 3 has a medium-water tank 34, a water pump 36 connected to the medium-water tank 34, a pressure tank A35 connected to the outlet of the water pump 36, and the pressure tank A35 connected to the water supply pipe of the toilet. Liquid level sensors A32 are installed at different heights of the medium-water tank 34. An overflow pipe A31 is installed at the top of the medium-water tank 34. A clean water inlet and a water supply valve 33 are installed at the bottom of the medium-water tank 34.
[0024] It also includes a clean water tank supply system 7, which has a clean water tank 76. The clean water tank 76 is also provided with an overflow vent 71 and a water inlet 73. The overflow vent 71 and the water inlet 73 are located at the upper part of the clean water tank 76, and a clean water pump 78 is connected to the lower part of the clean water tank 76. A pressure tank B79 and a pressure sensor C710 are connected to the water outlet pipe of the clean water pump 78. The water outlet pipe is connected to the washbasin 5 and the mop sink 6. Liquid level sensors C72 are installed at different heights of the clean water tank 76, and the liquid level of the clean water tank is indicated by a liquid level indicator light 74 installed on the clean water tank 76.
[0025] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A grey water treatment system characterized by: include: At least one washbasin and / or mop sink, with a grey water tank connected to the water outlet of the washbasin and / or mop sink via a drain pipe. The grey water tank is equipped with a filter basket to filter the water flowing into the washbasin and / or mop sink. A grey water pump is connected to the grey water tank, and a filter is connected to the outlet of the grey water pump. A pressure sensor B and a pressure gauge are connected to the top of the filter. An air flotation machine is connected to the filter, and an ozone catalytic device is connected to the air flotation machine. The system also includes a grey water tank supply system connected to the ozone catalytic device.
2. The grey water treatment system according to claim 1, characterized in that: The ozone catalytic device includes an ozone catalytic chamber with an exhaust port connected to an exhaust pipe. A liquid level switch is located at the bottom of the ozone catalytic chamber, and an overflow port is located at the top of the ozone catalytic chamber. An overflow pipe is connected to the overflow port, and an electric valve is installed on the overflow pipe.
3. The grey water treatment system according to claim 1, characterized in that: A liquid level alarm switch and an overflow pipe B are installed at the highest point of the grey water tank, and liquid level sensors B are installed at different heights of the grey water tank.
4. The grey water treatment system according to claim 1, characterized in that: The air flotation machine uses a self-circulation method for air flotation.
5. The grey water treatment system according to claim 1, characterized in that: The flotation machine has a flotation tank, which is divided into a flotation zone and a slag discharge zone by a partition. A scraper is installed above the flotation zone to scrape the slag generated during the flotation process to the slag discharge zone. A high liquid level switch and a low liquid level switch are installed in the flotation zone. The slag is discharged through the slag discharge port at the bottom of the slag discharge zone.
6. The grey water treatment system according to claim 1, characterized in that: The water supply system has a water tank, a water pump connected to the water tank, and a pressure tank A connected to the outlet of the water pump. The pressure tank A is connected to the water supply pipe of the toilet.
7. The grey water treatment system according to claim 1, characterized in that: Liquid level sensors A are installed at different heights in the intermediate water tank. An overflow pipe A is installed at the top of the intermediate water tank. A clean water inlet and a water supply valve are installed at the bottom of the intermediate water tank.
8. The grey water treatment system according to claim 1, characterized in that: It also includes a clean water tank supply system, which has a clean water tank, an overflow vent and a water inlet on the clean water tank. The overflow vent and the water inlet are located at the top of the clean water tank, and a clean water pump is connected to the bottom of the clean water tank. A pressure tank B and a pressure sensor C are connected to the water outlet pipe of the clean water pump, and the water outlet pipe is connected to a washbasin and a mop sink.
9. The grey water treatment system according to claim 5, characterized in that: Liquid level sensors C are installed at different heights in the clean water tank, and the liquid level in the clean water tank is indicated by liquid level indicator lights installed on the clean water tank.