A natural-based rural sewage separate collection-resource system and method

Abstract

The application provides a natural-based rural sewage quality-based collection-resource system, which comprises a water distribution device, a heavy sewage treatment area, a purification area and a dynamic storage device; the dynamic storage device comprises a sewage storage area for storing lightly polluted water and / or heavily polluted water and a clean water area for storing clean water; the water distribution device can distribute sewage into heavily polluted water, lightly polluted water and clean water; the heavily polluted water can enter the heavy sewage treatment area and / or the sewage storage area; the lightly polluted water can enter the sewage storage area and / or the purification area; and the clean water can enter the clean water area; the sewage storage area and the heavy sewage treatment area are connected with the purification area; and the purification area is connected with the clean water area. The quality-based collection of domestic sewage effectively reduces the amount of domestic sewage, thereby reducing the sewage treatment scale and investment, improving the rural water resource utilization rate and the rural water ecology, and being suitable for the rural sewage treatment construction and popularization.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment, and more particularly to a nature-based rural wastewater separation, collection, and resource recovery system and method. Background Technology

[0002] With social development, water resources, water environment, and water ecology issues are becoming increasingly prominent. Compared to cities, rural areas are characterized by dispersed residences, simpler domestic water use, and less centralized domestic wastewater discharge. Replicating urban domestic sewage treatment models in rural areas has many shortcomings.

[0003] There are two traditional methods for treating domestic wastewater: 1. Wastewater is discharged directly without treatment. In this method, relatively clean wastewater cannot be reused, resulting in resource waste, while heavily polluted wastewater is discharged directly, causing a certain degree of environmental pollution; 2. Wastewater is discharged centrally to terminal sewage treatment facilities. This method mixes relatively clean wastewater with heavily polluted wastewater, resulting in a larger total amount of wastewater and consequently higher investment and operating costs for sewage treatment facilities. Summary of the Invention

[0004] This invention provides a nature-based rural wastewater separation, collection, and resource recovery system and method to solve the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A nature-based rural wastewater separation and collection-resource recovery system includes a water separation device, a heavy wastewater treatment zone, a purification zone, and a dynamic storage device.

[0007] The dynamic storage device includes a wastewater storage area for storing lightly polluted water and / or heavily polluted water and a clean wastewater storage area for storing clean wastewater. The heavily polluted wastewater treatment area, the wastewater storage area, and the clean wastewater storage area are respectively connected to the water distribution device.

[0008] The water separation device can separate wastewater into heavily polluted water, lightly polluted water and clean wastewater. The heavily polluted water can enter the heavily polluted wastewater treatment area and / or the wastewater storage area, the lightly polluted water can enter the wastewater storage area and / or the purification area, and the clean wastewater can enter the clean wastewater area.

[0009] The wastewater storage area and the heavy wastewater treatment area are both connected to the purification area, and the purification area is connected to the clean wastewater area.

[0010] Furthermore, the water separation device includes a heavy wastewater valve, a light wastewater valve, and a clean water valve. The heavy wastewater valve is connected to the heavy wastewater treatment area, the light wastewater valve is connected to the wastewater storage area, and the clean water valve is connected to the clean water discharge area.

[0011] Furthermore, the water distribution device also includes a main body, an inlet pipe, a heavy wastewater outlet pipe, a light wastewater outlet pipe, and a clean water outlet pipe. The main body has a water storage cavity, the inlet pipe extends into the water storage cavity, and the outlet of the inlet pipe is close to the bottom of the water storage cavity. The heavy wastewater outlet pipe, the light wastewater outlet pipe, and the clean water outlet pipe are arranged sequentially from top to bottom on the side wall of the main body and communicate with the water storage cavity. The heavy wastewater outlet pipe is equipped with a heavy wastewater valve, the light wastewater outlet pipe is equipped with a light wastewater valve, and the clean water outlet pipe is equipped with a clean water valve.

[0012] Furthermore, the dynamic storage device includes a dynamic storage body and a flexible sail disposed within the dynamic storage body. The edge of the flexible sail is fixed within the dynamic storage body and divides the dynamic storage body into two areas, which respectively constitute the sewage storage area and the clean water discharge area. The middle part of the flexible sail can shift its position according to the pressure changes on both sides.

[0013] Furthermore, the heavy wastewater treatment area is an anaerobic pond, and the purification area includes a biochemical pond and an ecological wetland.

[0014] Furthermore, the aforementioned nature-based rural wastewater separation, collection, and resource recovery system includes the following steps:

[0015] S1: Wastewater is classified into heavily polluted water, lightly polluted water, and clean wastewater according to the degree of pollution and discharged separately;

[0016] S2: Discharge heavily polluted water to the heavily polluted wastewater treatment area and / or wastewater storage area, discharge lightly polluted water to the wastewater storage area and / or purification area, and discharge clean wastewater to the clean wastewater area;

[0017] S3: Heavily polluted water in the heavy wastewater treatment area is treated and then discharged into the purification area for further treatment; lightly polluted water is discharged into the purification area for further treatment.

[0018] S4: Water treated in the purification zone is discharged into a clean sewage area or directly utilized as a resource;

[0019] S5: The water in the clean drainage area is utilized for resource recovery.

[0020] Furthermore, the clean drainage area can store rainwater.

[0021] Furthermore, in S2, during cold weather, both heavily polluted and lightly polluted water are discharged into the wastewater storage area for storage.

[0022] Compared with existing rural sewage treatment methods, the beneficial effects of this invention are:

[0023] (1) The present invention classifies the generated wastewater into heavily polluted water, lightly polluted water and clean wastewater according to the degree of pollution and reuses them, thereby improving the utilization rate of rural water resources and improving the rural water ecology.

[0024] (2) Collecting and treating wastewater separately reduces the total amount of wastewater, thereby reducing the investment and operating costs of wastewater treatment facilities, making it suitable for the construction and promotion of rural wastewater treatment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a nature-based rural wastewater separation collection and resource recovery system and method disclosed in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of a water separation device for a nature-based rural sewage separation collection-resource utilization system and method disclosed in an embodiment of the present invention.

[0028] In the diagram: 1. Water distribution device; 11. Heavy wastewater valve; 12. Light wastewater valve; 13. Clean water valve; 14. Main body; 141. Water storage chamber; 15. Inlet pipe; 16. Heavy wastewater outlet pipe; 17. Light wastewater outlet pipe; 18. Clean water outlet pipe; 2. Heavy wastewater treatment area; 3. Purification area; 4. Dynamic storage device; 41. Wastewater storage area; 42. Clean water drainage area; 43. Dynamic storage main body; 44. Flexible water sail. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example:

[0031] A nature-based rural wastewater separation, collection, and resource recovery system, such as... Figure 1 As shown, it includes a water separation device 1, a heavy wastewater treatment zone 2, a purification zone 3, and a dynamic storage device 4;

[0032] The dynamic storage device 1 includes a wastewater storage area 41 for storing lightly polluted water and / or heavily polluted water and a clean wastewater area 42 for storing clean wastewater. The heavily polluted wastewater treatment area 2, the wastewater storage area 41 and the clean wastewater area 42 are respectively connected to the water distribution device 1.

[0033] The water separation device 1 can separate sewage into heavily polluted water, lightly polluted water and clean wastewater. The heavily polluted water can enter the heavily polluted sewage treatment area 2 and / or the sewage storage area 41. The lightly polluted water can enter the sewage storage area 41 and / or the purification area 3. The clean wastewater can enter the clean wastewater area 42.

[0034] The wastewater storage area 41 and the heavy wastewater treatment area 2 are both connected to the purification area 3, and the purification area 3 is connected to the clean wastewater area 42. The operating cost of this invention is negligible compared to traditional underground or other treatment facilities, particularly reducing maintenance requirements and costs. The separate collection of domestic wastewater effectively reduces the volume of domestic sewage, thereby reducing the scale and investment of wastewater treatment. Water used for washing vegetables and fruits is clean wastewater, which can be directly utilized for agricultural irrigation, water features, landscaping, and cleaning. Polluted water is classified into heavy wastewater and light wastewater based on the content of oil, detergents, and organic matter. Wastewater treatment primarily uses natural methods, providing low-cost treatment and resource recovery for both heavy and light wastewater, greatly improving the rural water ecology and increasing water resource utilization.

[0035] Preferred, such as Figure 2 As shown, the water separation device 1 includes a heavy wastewater valve 11, a light wastewater valve 12, and a clean water valve 13. The heavy wastewater valve 11 is connected to the heavy wastewater treatment area 2, the light wastewater valve 12 is connected to the wastewater storage area 41, and the clean water valve 13 is connected to the clean wastewater area 42. Based on the generation pattern of domestic wastewater, valves, either manually or automatically controlled, separate the clean wastewater and polluted water, controlling their entry into the clean wastewater pipes and polluted water pipes respectively, and discharging them to the clean wastewater area 42 and the wastewater storage area 41 respectively. To prevent oil from floating in the polluted water, an oil filter screen is installed before the clean water valve 13 to prevent oil from entering the clean wastewater area 42.

[0036] Preferred, such as Figure 2As shown, the water distribution device 1 also includes a main body 14, an inlet pipe 15, a heavy wastewater outlet pipe 16, a light wastewater outlet pipe 17, and a clean water outlet pipe 18. The main body 14 has a water storage cavity 141. The inlet pipe 17 extends into the water storage cavity 141, and the outlet of the inlet pipe 15 is close to the bottom of the water storage cavity 141. The heavy wastewater outlet pipe 14, the light wastewater outlet pipe 15, and the clean water outlet pipe 16 are arranged sequentially from top to bottom on the side wall of the main body 14 and communicate with the water storage cavity 141. The heavy wastewater outlet pipe 16 is equipped with a heavy wastewater valve 11, the light wastewater outlet pipe 17 is equipped with a light wastewater valve 12, and the clean water outlet pipe 18 is equipped with a clean water valve 13. The inlet pipe 15, the heavy wastewater outlet pipe 16, the light wastewater outlet pipe 17, and the clean water outlet pipe 18 are configured to transport the polluted water and clean wastewater to the wastewater storage area 41 and the clean wastewater area 42, respectively. The water storage chamber 141 can store the heavy wastewater, light wastewater, and clean water and then discharge them through pipes.

[0037] Preferred, such as Figure 1 As shown, the dynamic storage device 4 includes a dynamic storage body 43 and a flexible water sail 44 disposed within the dynamic storage body 43. The edge of the flexible water sail 44 is fixed within the dynamic storage body 43, dividing the dynamic storage body 43 into two areas, which respectively constitute the sewage storage area 41 and the clean water drainage area 42. The central part of the flexible water sail 44 can shift its position according to the pressure changes on both sides. By setting the flexible water sail 44 in the middle, a pool is divided into two spaces to store clean water and polluted water respectively. The flexible water sail 44 floats in the water, with its bottom fixed and its upper part floating on the water surface and able to change position under water pressure. The bottom of the clean water drainage area 42 can be appropriately seepage-proofed (based on water quality characteristics). During the rainy season, rainwater can enter the clean water drainage area 42 to alleviate flooding and store rainwater resources. Since polluted water does not need to be stored during the rainy season, the flexible water sail 44 moves towards the sewage storage area 41, increasing the space of the clean water drainage area 42. During the cold season, due to the low purification efficiency of natural treatment methods such as anaerobic digestion, biological ponds, and natural wetlands, the treated water fails to meet standards. After entering a wastewater storage tank, the polluted water is stored until the air temperature rises to a suitable level before entering the anaerobic digestion, biological pond, and natural wetland treatment stages. The dynamic storage device 4, while fully utilizing the tank volume, stores rainwater, clean sewage, and excess polluted water, creating conditions for subsequent utilization and treatment. The dynamic storage device 4 has high space utilization and low investment, making it suitable for the coordinated treatment and resource recovery of rainwater and wastewater in rural single-household or multi-household and community settings.

[0038] Preferably, the heavily polluted wastewater treatment zone 2 is an anaerobic pond, and the purification zone 3 includes a biological pond 31 and an ecological wetland 32. After polluted water containing oil, detergents, etc., enters the polluted water collection tank, it undergoes low-cost treatment and resource recovery using natural methods such as anaerobic (septic tank, etc.), biological pond, natural wetland, and land treatment. The treatment process primarily using anaerobic-biological pond-natural wetland-land treatment is used for low-cost treatment and resource recovery of heavily polluted water, while the process primarily using oxidation pond-natural wetland-land treatment is used for the treatment and resource recovery of lightly polluted water. This water treatment and water recycling model, combined with water environment landscape design, is suitable for promotion in ecological village construction.

[0039] Preferably, the nature-based rural wastewater separation, collection, and resource recovery system includes the following steps:

[0040] S1: Wastewater is classified into heavily polluted water, lightly polluted water, and clean wastewater according to the degree of pollution and discharged separately;

[0041] S2: Discharge heavily polluted water to the heavily polluted wastewater treatment area, discharge lightly polluted water to the wastewater storage area and purification area, and discharge clean wastewater to the clean wastewater area;

[0042] Heavily polluted wastewater is discharged into a heavily polluted wastewater treatment zone. This wastewater contains a significant amount of organic pollutants such as oil, detergents, excrement, and food residue. In this embodiment, the heavily polluted wastewater treatment zone is an anaerobic pond. Anaerobic bacteria in the anaerobic pond hydrolyze, acidify, and methanate organic matter, removing it and improving the wastewater's biodegradability, which is beneficial for subsequent aerobic treatment. Lightly polluted wastewater contains fewer organic pollutants but cannot be directly utilized and needs to be treated in a purification zone. This purification zone includes a biological pond and an ecological wetland. The biological pond can be selected as aerobic, anaerobic, or facultative pond as needed. In the oxidation pond, organic matter in the wastewater is mainly removed through symbiotic interaction between bacteria and algae. Heterotrophic microorganisms, namely aerobic bacteria and fungi, oxidize and degrade organic matter to generate energy and synthesize new cells. Algae fix carbon dioxide and absorb nutrients such as nitrogen and phosphorus, as well as organic matter, through photosynthesis to synthesize new cells and release oxygen. Water treated in a biochemical pond enters an ecological wetland, where it continues to improve water quality. The wetland helps slow down the flow of water. When water containing toxins, impurities (pesticides, domestic sewage, and industrial emissions) or is eutrophic passes through the wetland, the flow rate slows down. The toxins, impurities, and nutrients in the water are either absorbed by wetland plants or deposited in the wetland mud layer, thus purifying the downstream water quality.

[0043] The wastewater treatment capacity of the heavy wastewater treatment area decreases as the temperature decreases. When the temperature is low, the volume of heavily polluted water exceeds the load of the heavy wastewater treatment area, so the heavily polluted water is discharged to the wastewater storage area. As the temperature rises and the weather gradually warms up, the wastewater treatment capacity of the heavy wastewater treatment area increases, and the polluted water stored in the wastewater storage area is then discharged to the heavy wastewater treatment area for treatment.

[0044] Slightly polluted water is discharged into the sewage storage area and the purification area. When the volume of slightly polluted water is small, it can be directly discharged into the purification area for purification. When the temperature is low, the volume of slightly polluted water exceeds the treatment capacity of the purification area, and the volume is large, the slightly polluted water is discharged into the sewage storage area. As the temperature rises, the polluted water stored in the sewage storage area is gradually purified through the heavily polluted wastewater treatment area and the purification area.

[0045] S3: Heavily polluted water in the heavy wastewater treatment area is discharged to the purification area for further treatment after treatment; water in the wastewater storage area is discharged to the purification area for further treatment.

[0046] S4: Water treated in the purification zone is discharged into a clean sewage area or directly utilized as a resource;

[0047] S5: The water in the clean drainage area is utilized for resource recovery.

[0048] Preferably, the clean drainage area is capable of storing rainwater. During the rainy season, rainwater can enter the clean drainage area 42 to alleviate flooding and store rainwater resources.

[0049] Preferably, in S2, during cold seasons with low temperatures, both heavily polluted and lightly polluted wastewater are discharged into the wastewater storage area for storage. In winter, the wastewater treatment facility also does not require insulation or underground operation, saving costs and being both economical and environmentally friendly.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nature-based rural wastewater separation, collection, and resource recovery system, characterized in that, It includes a water distribution device (1), a heavy wastewater treatment zone (2), a purification zone (3), and a dynamic storage device (4). The dynamic storage device (4) includes a wastewater storage area (41) for storing lightly polluted water and / or heavily polluted water and a clean wastewater area (42) for storing clean wastewater. The heavily polluted wastewater treatment area (2), the wastewater storage area (41) and the clean wastewater area (42) are respectively connected to the water distribution device (1). The water separation device (1) can divide sewage into heavily polluted water, lightly polluted water and clean wastewater. The heavily polluted water can enter the heavily polluted sewage treatment area (2) and / or the sewage storage area (41). The lightly polluted water can enter the sewage storage area (41) and / or the purification area (3). The clean wastewater can enter the clean wastewater area (42). The clean wastewater area (42) can store rainwater. When the weather is cold, both the heavily polluted water and the lightly polluted water are discharged to the sewage storage area (41) for storage. The wastewater storage area (41) and the heavy wastewater treatment area (2) are both connected to the purification area (3), and the purification area (3) is connected to the clean water drainage area (42); The dynamic storage device (4) includes a dynamic storage body (43) and a flexible water sail (44) disposed in the dynamic storage body (43). The edge of the flexible water sail (44) is fixed in the dynamic storage body (43) and divides the dynamic storage body (43) into two areas. The two areas constitute the sewage storage area (41) and the clean water discharge area (42) respectively. The middle part of the flexible water sail (44) can shift its position with the pressure change on both sides. The heavy wastewater treatment zone (2) is an anaerobic pond, and the purification zone (3) includes a biochemical pond and an ecological wetland; The water distribution device (1) further includes a main body (14), an inlet pipe (15), a heavy wastewater outlet pipe (16), a light wastewater outlet pipe (17), and a clean water outlet pipe (18). The main body (14) has a water storage cavity (141). The inlet pipe (15) extends into the water storage cavity (141), and the outlet of the inlet pipe (15) is close to the bottom of the water storage cavity (141). The heavy wastewater outlet pipe (16), the light wastewater outlet pipe (17), and the clean water outlet pipe (18) are arranged sequentially from top to bottom on the side wall of the main body (14) and communicate with the water storage cavity (141). During the rainy season, rainwater enters the clean drainage area (42) to alleviate flooding and store rainwater resources. Since polluted water does not need to be stored during the rainy season, the flexible water sail (44) moves towards the sewage storage area (41) to increase the space of the clean drainage area (42). During the cold season, due to the low purification efficiency of anaerobic, biochemical pond, and natural wetland natural treatment methods, the treatment does not meet the standards. Polluted water enters the sewage storage area (41) and is stored until the air temperature rises to a suitable level before entering the anaerobic, biochemical pond, and natural wetland treatment process.

2. The rural wastewater separation, collection, and resource recovery system based on nature according to claim 1, characterized in that, The water distribution device (1) includes a heavy sewage valve (11), a light sewage valve (12) and a clean water valve (13). The heavy sewage valve (11) is connected to the heavy sewage treatment area (2), the light sewage valve (12) is connected to the sewage storage area (41), and the clean water valve (13) is connected to the clean water drainage area (42).

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