Device for resource utilization of domestic sewage

Abstract

The utility model provides a kind of resource utilization device suitable for domestic sewage, including septic tank, sedimentation zone, ecological filter area, matrix adsorption clean water area and irrigation area;The water inlet end of septic tank is communicated with toilet wastewater, the water inlet of sedimentation zone is communicated with remaining wastewater, the water outlet end of septic tank, the water inlet of ecological filter area is communicated with the water outlet of sedimentation zone, and ecological filter area has biological rope filling inside;The water inlet of matrix adsorption clean water area is communicated with the water outlet of ecological filter area, for filtering wastewater, and filtered wastewater is used as irrigation water.The utility model uses septic tank to carry out anaerobic digestion to toilet wastewater, then processed toilet wastewater is sequentially introduced into sedimentation zone, ecological filter area and matrix adsorption clean water area with remaining wastewater for treatment, removes granular matter, oil and other unsuitable resource material in sewage, maximally retains nitrogen, phosphorus and other nutrient substance, with high resource potential, easy management and other characteristics.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a resource utilization device suitable for domestic wastewater. Background Technology

[0002] Rural domestic sewage originates from wastewater discharged during residents' daily lives, including feces and urine, rinsing of sanitary ware, bathing, laundry, and cleaning of kitchens and rooms. The types of pollutants are simple, with high concentrations of organic matter and nitrogen and phosphorus, and basically no heavy metals or toxic and harmful substances, thus possessing good potential for resource utilization.

[0003] Currently, most regions do not treat rural domestic sewage as a resource, but instead simply copy the treatment model used for urban domestic sewage. This involves collecting rural domestic sewage into municipal sewer systems, transporting it to sewage treatment plants or decentralized agricultural wastewater treatment facilities for treatment, and then discharging it into surrounding waterways. Commonly used decentralized rural domestic sewage treatment processes include integrated membrane A2O (anaerobic-anoxic-aerobic process), MBR (membrane bioreactor), combined processes (biofilter-constructed wetland), and soil infiltration. These processes have drawbacks such as high construction costs, high operating costs, and unstable effluent quality.

[0004] Currently, the treatment processes used for rural domestic sewage primarily aim to meet discharge standards, failing to fully utilize the nitrogen and phosphorus resources within the sewage. Therefore, in accordance with the needs of low-carbon, ecological, and resource-based development, it is essential to comprehensively consider rural drainage conditions and water demand, and to implement resource-based treatment of rural domestic sewage based on the principles of technical effectiveness, economic feasibility, and ease of management.

[0005] Currently, rural domestic sewage resource utilization models include pollutant reduction coupled with economic crop planting, tailwater irrigation, water quality control-type on-demand discharge, and black and gray water resource utilization. However, these models still have drawbacks such as low resource utilization efficiency and complex operation and maintenance. Patent document CN203545849U discloses a circulating water treatment device for septic tank public toilets, including a toilet and a septic tank. This scheme uses the septic tank as a sedimentation tank, and the effluent passes through a normal temperature anaerobic biological filter, an upflow aerated biological filter, and a filtration and sterilization section in sequence, and finally treats the sewage into reusable water, which greatly improves the utilization level of water resources. However, it fails to fully utilize the nitrogen and phosphorus resources in rural domestic sewage.

[0006] Therefore, there is an urgent need to propose a resource utilization device for domestic sewage with high resource efficiency from the perspective of retaining nitrogen and phosphorus nutrients and improving the environment. Utility Model Content

[0007] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a resource utilization device suitable for domestic sewage.

[0008] The resource utilization device for domestic sewage provided by this utility model includes a septic tank, a sedimentation zone, an ecological filtration zone, a substrate adsorption water purification zone, and an irrigation zone. The domestic sewage includes toilet wastewater and other wastewater. The inlet of the septic tank is connected to the toilet wastewater through a pipe network. The septic tank is used to anaerobic digest the toilet wastewater. The inlet of the sedimentation zone is connected to the outlet of the other wastewater and septic tank through a pipeline network to settle particulate matter in the wastewater. The inlet of the ecological filtration zone is connected to the outlet of the sedimentation zone. The ecological filtration zone has biological rope packing inside for ecological adsorption treatment of wastewater. The inlet of the substrate adsorption water purification zone is connected to the outlet of the ecological filtration zone. The substrate adsorption water purification zone has a frame-type packing material inside for filtering wastewater. The outlet of the substrate adsorption water purification zone is connected to the irrigation zone, and the filtered wastewater is used for irrigation.

[0009] Preferably, the outlet of the sedimentation zone is connected to an outlet pipe, and the outlet of the sedimentation zone outlet pipe is connected to the top of the ecological filtration zone; The outlet of the ecological filtration zone is located at the bottom of the ecological filtration zone.

[0010] Preferably, a support rod is installed at the top of the ecological filtration zone in a horizontal direction; Multiple biological rope fillers are sequentially arranged along the length of the support rod, with adjacent biological rope fillers spaced apart.

[0011] Preferably, the bio-rope filler is tied to the support rod with cable ties.

[0012] Preferably, the spacing between adjacent bio-rope fillers is 30cm.

[0013] Preferably, the length of the bio-rope packing is the same as the height of the ecological filtration zone.

[0014] Preferably, the inlet of the substrate adsorption water zone is located at the bottom of the substrate adsorption water zone; The frame-type filler inside the matrix adsorption water zone includes volcanic rock, and the particle size of the volcanic rock changes from coarse to fine from bottom to top.

[0015] Preferably, the volcanic rock includes bottom volcanic rock, middle volcanic rock, and top volcanic rock; The diameter of the bottom layer volcanic rock is 3-5 cm, the diameter of the middle layer volcanic rock is 1-3 cm, and the diameter of the top layer volcanic rock is 0.5-1 cm.

[0016] Preferably, the system also includes a water pump, the inlet of which is connected to the outlet of the septic tank via a pipeline network, and the outlet of which is connected to the irrigation area via a pipeline network.

[0017] Preferably, the outlet of the substrate adsorption water purification zone is located at the top of the substrate adsorption water purification zone, and the filtered wastewater overflows from the outlet of the substrate adsorption water purification zone to the outside; The bottom of the irrigation area is equipped with drip irrigation pipes. When the irrigation area needs water and fertilizer, the water outlet of the water pump and the water outlet of the substrate adsorption clean water area are connected to the drip irrigation pipes. When the irrigation area does not require water and fertilizer, the outlet of the water pump and the outlet of the substrate adsorption clean water area are connected to the surrounding ditches.

[0018] Compared with the prior art, the present invention has the following beneficial effects: This invention employs a septic tank for anaerobic digestion of toilet wastewater. The treated wastewater, along with other wastewater, is then sequentially passed through a sedimentation zone, an ecological filtration zone, and a matrix adsorption clear water zone. Larger particles in the wastewater are deposited in this process, while smaller suspended solids and oily substances are retained. The wastewater is then filtered through the matrix, thus removing particulate matter, oil, and other substances unsuitable for resource recovery while maximizing the retention of nutrients such as nitrogen and phosphorus. This method features high resource recovery potential, convenient management, and excellent effluent sensory effects. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] The diagram shows: 1. Septic tank; 2. Water pump; 3. Sedimentation zone; 4. Ecological filtration zone; 4. Support rod; 4. Bio-rope packing material; 4. Matrix adsorption clear water zone; 5. Volcanic rock; 5. Irrigation zone; 6. Drip irrigation pipe; 6. Detailed Implementation

[0021] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0022] This utility model discloses a resource utilization device suitable for domestic sewage. The wastewater is treated sequentially through a septic tank, a sedimentation zone, an ecological filtration zone, and a matrix adsorption clear water zone, thereby removing particulate matter, oil, and other substances unsuitable for resource utilization from the sewage, while retaining nutrients such as nitrogen and phosphorus to the maximum extent. It has the characteristics of high resource utilization potential, convenient management, and good sensory effect of effluent.

[0023] According to the resource utilization device for domestic sewage provided by this utility model, such as... Figure 1 As shown, the system includes a septic tank 1, a sedimentation zone 3, an ecological filtration zone 4, a substrate adsorption clear water zone 5, and an irrigation zone 6. The domestic sewage includes toilet wastewater and other wastewater (lower concentration wastewater from kitchens, bathrooms, etc.). The inlet of the septic tank 1 is connected to the toilet wastewater via a pipe network. The septic tank 1 is used for anaerobic digestion treatment of the toilet wastewater. Preferably, the septic tank 1 is a three-compartment septic tank. The toilet wastewater first enters the three-compartment septic tank, undergoes anaerobic digestion in the three zones, and then overflows. The third compartment of the septic tank 1 is equipped with a water pump 2 and pipes, allowing the water in the third compartment to be used for irrigation. Specifically, the inlet of the water pump 2 is connected to the outlet of the septic tank 1 via a pipe network, and the outlet of the water pump 2 is connected to the irrigation zone 6 via a pipe network. The remaining wastewater and the overflow wastewater from the three-compartment septic tank enter the same pipe and then flow into the ecological purification tank. The ecological purification tank mainly consists of three parts: a sedimentation zone 3, an ecological filtration zone 4, and a substrate adsorption clear water zone 5. The inlet of the sedimentation zone 3 is connected to the outlet of the remaining wastewater and the septic tank 1 through a pipe network to settle particulate matter in the wastewater. The inlet of the ecological filtration zone 4 is connected to the outlet of the sedimentation zone 3. The ecological filtration zone 4 contains biological rope packing 42 for ecological adsorption treatment of the wastewater. The inlet of the substrate adsorption clear water zone 5 is connected to the outlet of the ecological filtration zone 4. The substrate adsorption clear water zone 5 contains frame packing for filtering the wastewater. The outlet of the substrate adsorption clear water zone 5 is connected to the irrigation zone 6. The filtered wastewater is used for irrigation.

[0024] The inlet pipe of sedimentation zone 3 is at a higher elevation, allowing larger particles in the wastewater to settle at the bottom of the tank through natural sedimentation. An outlet pipe is installed in the middle of sedimentation zone 3, with its outlet located at the very top of the ecological filtration zone, transporting the wastewater from the sedimentation zone to the ecological filtration zone.

[0025] A support rod 41 is installed horizontally at the top of the ecological filtration zone 4. Multiple bio-rope fillers 42 are sequentially arranged along the length of the support rod 41, with adjacent bio-rope fillers 42 spaced apart. The bio-rope fillers 42 are tied to the support rod 41 with cable ties. The distance between adjacent bio-rope fillers 42 is 30cm. The length of the bio-rope fillers 42 is the same as the height of the ecological filtration zone 4. The outlet of the ecological filtration zone 4 is located at the bottom of the zone. Wastewater from the ecological filtration zone 4 flows from the top to the bottom. After ecological adsorption and filtration by the bio-rope fillers 42, small suspended solids and oily substances are trapped.

[0026] The inlet of the substrate adsorption water purification zone 5 is located at the bottom of the substrate adsorption water purification zone 5. The frame-type packing material inside the substrate adsorption water purification zone 5 includes volcanic rock 51, and the particle size of the volcanic rock 51 decreases from bottom to top. Specifically, the effluent from the ecological filtration zone 4 enters the bottom of the substrate adsorption water purification zone 5, where a frame-type packing material is placed. The packing material is placed in a plastic frame, and the packing material is volcanic rock 51. The particle size of the packing material decreases from bottom to top, with the diameter of the bottom volcanic rock 51 being 3-5 cm, the middle volcanic rock 51 being 1-3 cm, and the top volcanic rock 51 being 0.5-1 cm. The outlet pipe of the substrate adsorption water purification zone 5 is located at the top of the substrate adsorption water purification zone 5. During the process of wastewater passing through the substrate filtration from bottom to top, it is filtered layer by layer by the volcanic rock 51. The water reaching the outlet pipe is relatively clear and overflows by gravity for use as irrigation water.

[0027] The outlet of the substrate adsorption water purification zone 5 is located at the top of the substrate adsorption water purification zone 5, and the filtered wastewater overflows to the outside from the outlet of the substrate adsorption water purification zone 5; the bottom of the irrigation zone 6 is equipped with a drip irrigation pipe 61. When the irrigation zone 6 needs water and fertilizer, the outlet of the water pump 2 and the outlet of the substrate adsorption water purification zone 5 are connected to the drip irrigation pipe 61, and the water from the three-compartment septic tank 1 and the ecological purification tank is dripped to the roots of the plants through the pipe; when the irrigation zone 6 does not need water and fertilizer, the outlet of the water pump 2 and the outlet of the substrate adsorption water purification zone 5 are connected to the surrounding ditches for natural ecological purification.

[0028] This invention classifies and treats domestic wastewater through septic tanks and ecological purification tanks, removing particulate matter, oil, and other substances unsuitable for resource recovery from the sewage, while retaining nutrients such as nitrogen and phosphorus to the maximum extent. It features high resource recovery potential, convenient management, and good sensory effects of the effluent.

[0029] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for the resource utilization of domestic sewage, characterized in that, It includes a septic tank (1), a sedimentation zone (3), an ecological filtration zone (4), a substrate adsorption water zone (5), and an irrigation zone (6); The domestic sewage includes toilet wastewater and other wastewater. The inlet of the septic tank (1) is connected to the toilet wastewater through a pipe network. The septic tank (1) is used to anaerobic digest the toilet wastewater. The inlet of the sedimentation zone (3) is connected to the outlet of the other wastewater and septic tank (1) through the pipeline network to settle particulate matter in the wastewater. The inlet of the ecological filtration zone (4) is connected to the outlet of the sedimentation zone (3). The ecological filtration zone (4) has biological rope packing (42) inside to perform ecological adsorption treatment on the wastewater. The inlet of the substrate adsorption water zone (5) is connected to the outlet of the ecological filtration zone (4). The substrate adsorption water zone (5) has a frame-type packing material inside for filtering wastewater. The outlet of the substrate adsorption water zone (5) is connected to the irrigation zone (6). The filtered wastewater is used for irrigation.

2. The resource utilization device for domestic sewage according to claim 1, characterized in that, The outlet of the sedimentation zone (3) is connected to an outlet pipe, and the outlet of the outlet pipe of the sedimentation zone (3) is connected to the top of the ecological filtration zone (4). The outlet of the ecological filtration zone (4) is located at the bottom of the ecological filtration zone (4).

3. The resource utilization device for domestic sewage according to claim 1, characterized in that, A support rod (41) is installed horizontally on the top of the ecological filtration zone (4). Multiple bio-rope fillers (42) are sequentially arranged along the length of the support rod (41), with adjacent bio-rope fillers (42) spaced apart.

4. The resource utilization device for domestic sewage according to claim 3, characterized in that, The bio-rope filler (42) is tied to the support rod (41) with cable ties.

5. The resource utilization device for domestic sewage according to claim 3, characterized in that, The spacing between adjacent bio-rope fillers (42) is 30cm.

6. The resource utilization device for domestic sewage according to claim 3, characterized in that, The length of the bio-rope filler (42) is the same as the height of the ecological filtration zone (4).

7. The resource utilization device for domestic sewage according to claim 1, characterized in that, The inlet of the substrate adsorption water zone (5) is located at the bottom of the substrate adsorption water zone (5); The frame-type filler inside the matrix adsorption water zone (5) includes volcanic rock (51), and the particle size of the volcanic rock (51) changes from coarse to fine from bottom to top.

8. The resource utilization device for domestic sewage according to claim 7, characterized in that, The volcanic rock (51) includes bottom volcanic rock (51), middle volcanic rock (51) and top volcanic rock (51). The diameter of the bottom volcanic rock (51) is 3-5 cm, the diameter of the middle volcanic rock (51) is 1-3 cm, and the diameter of the top volcanic rock (51) is 0.5-1 cm.

9. The resource utilization device for domestic sewage according to claim 1, characterized in that, It also includes a water pump (2), the water inlet of which is connected to the water outlet of the septic tank (1) through a pipeline network, and the water outlet of the water pump (2) is connected to the irrigation area (6) through a pipeline network.

10. The resource utilization device for domestic sewage according to claim 9, characterized in that, The outlet of the matrix adsorption water purification zone (5) is located at the top of the matrix adsorption water purification zone (5), and the filtered wastewater overflows to the outside from the outlet of the matrix adsorption water purification zone (5). The bottom of the irrigation area (6) is provided with drip irrigation pipes (61). When the irrigation area (6) needs water and fertilizer, the outlet of the water pump (2) and the outlet of the substrate adsorption water area (5) are connected to the drip irrigation pipes (61). When the irrigation area (6) does not require water and fertilizer, the outlet of the water pump (2) and the outlet of the substrate adsorption clean water area (5) are connected to the surrounding ditches.

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