Small micro-power integrated treatment equipment for rural domestic sewage

Abstract

The utility model discloses small-sized micro-power integrated treatment equipment for rural domestic sewage, which comprises a box body, the interior of the box body is divided into an upper layer and a lower layer by a transverse partition plate, the lower layer is an anaerobic tank, an anaerobic tank water inlet well communicated with the anaerobic tank is arranged on one side of the upper layer, and a water inlet artificial grating frame is arranged in the anaerobic tank water inlet well close to the edge; a water inlet is formed in the position corresponding to the water inlet artificial grating frame, an anaerobic tank water outlet well communicated with the anaerobic tank is arranged on the side opposite to the anaerobic tank water inlet well, and a hydrolytic acidification biological filter bed tank, a contact oxidation reaction tank and a biological sedimentation tank are arranged on the upper layer of the box body in a separating mode. According to the invention, the defects of rural single-house type domestic sewage treatment are overcome, facilities and equipment are simple, the overall size is small, the operation cost is low, and effluent can reach the primary standard of Integrated Wastewater Discharge Standard and can be directly discharged into a water body.

Description

Technical Field

[0001] This utility model relates to the field of rural domestic sewage treatment technology, specifically a small-scale, micro-powered integrated treatment device for rural domestic sewage. Background Technology

[0002] Continuously improving the rural living environment is an important task in implementing the rural revitalization strategy, which is related to the fundamental well-being of the vast number of farmers. Promoting rural domestic sewage treatment in a phased manner according to local conditions and focusing on solving problems such as constant sewage flow and black and odorous water bodies is one of the important tasks of rural living environment governance.

[0003] The coverage rate of domestic sewage treatment facilities in rural areas is low, and there is a lack of effective treatment technologies. This results in large amounts of untreated sewage being discharged directly into water bodies, putting enormous pressure on water quality and the ecological environment.

[0004] In rural areas, due to the dispersed residences of villagers, constructing centralized treatment facilities presents challenges such as difficulties in collecting domestic sewage and high costs. Furthermore, current rural sewage treatment facilities face significant operational and maintenance challenges due to a lack of professional technicians and managers. This makes it difficult to guarantee the smooth operation and maintenance of these facilities. Some smaller facilities, with low levels of automation, require manual operation and management, further complicating the process. Additionally, the rural drainage network is inadequate, resulting in insufficient overall sewage collection and treatment rates in rural areas.

[0005] To address the aforementioned issues, while decentralized integrated domestic sewage treatment equipment for rural areas has been invented, most suffer from large equipment size and high operating costs, placing a significant economic burden on individual households. Existing integrated equipment involves sequentially connected treatment tanks, requiring substantial power for aeration in the aerobic tanks (which are typically the same depth as the tank body, requiring high aeration pressure and thus significant power) and sludge return. This high operating cost for individual rural households hinders its widespread adoption. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model discloses a small-scale, micro-powered integrated treatment device for rural domestic sewage. It has a small overall size, low operating costs, and the effluent meets the Class I standard of the "Integrated Wastewater Discharge Standard," allowing it to be directly discharged into water bodies.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a small-scale, micro-powered integrated treatment device for rural domestic sewage, comprising a housing, characterized in that: the housing is divided into upper and lower layers by a horizontal partition, the lower layer being an anaerobic tank, and an anaerobic tank inlet well connected to the anaerobic tank is provided on one side of the upper layer, an inlet artificial bar frame is provided near the edge of the inlet artificial bar frame, an inlet is provided corresponding to the position of the inlet artificial bar frame, and an anaerobic tank outlet connected to the anaerobic tank is provided on the side opposite to the anaerobic tank inlet well. The water well is equipped with a hydrolysis acidification biological filter bed, a contact oxidation reaction tank, and a biological sedimentation tank on the upper part of the tank. The hydrolysis acidification biological filter bed is connected to the top of the anaerobic tank inlet well. The bottom of the hydrolysis acidification biological filter bed is provided with a water passage hole connected to the contact oxidation reaction tank. The hydrolysis acidification biological filter bed is filled with ceramsite packing. The bottom of the contact oxidation reaction tank is provided with an aeration device and suspended MBBR biological packing. The contact oxidation reaction tank is connected to the biological sedimentation tank, and the biological sedimentation tank is provided with a drain outlet.

[0008] This invention employs a layered design, saving space. Rural domestic sewage, after being intercepted by an inlet manual bar screen to remove large debris, enters the anaerobic tank located at the bottom of the tank. Compared to current flat-lay integrated devices, the anaerobic tank effectively isolates air, creating an anaerobic environment. The sewage ferments within the anaerobic ammoniation reaction module, converting large organic molecules into smaller ones or producing gases such as methane and hydrogen, laying the foundation for subsequent biochemical units. Water from the anaerobic tank flows through the effluent well and is then transferred to the hydrolysis-acidification biological filter bed. During this transfer, it comes into contact with air, creating an anaerobic environment within the hydrolysis-acidification biological filter bed. Ceramsite packing is placed within the hydrolysis-acidification biological filter bed. The numerous pores within the ceramsite packing provide ample growth space for microorganisms and also achieve a dual function of filtration and interception. After passing through this unit, the organic matter content in the wastewater is further reduced. Wastewater flows by gravity from the top of the anaerobic tank into the upper left corner of the anoxic biological ceramsite filter bed, gradually flowing through the ceramsite filter bed in this area, and then enters the next unit contact oxidation reaction tank from the bottom holes in the lower right corner.

[0009] Air is pumped into the water body through an air pump in the contact oxidation reaction tank to maintain a certain concentration of dissolved oxygen in the water body, creating an environment on which aerobic organisms depend for survival. The suspended MBBR biological packing purifies wastewater through the process of cultivating microorganisms, which can degrade all organic matter in the wastewater into carbon dioxide and water, and finally achieve the standard discharge.

[0010] The micro-nano aeration device is placed at the bottom of the tank, and the MBBR suspended packing is suspended in the water. The inlet and outlet are located at opposite corners of the bottom of the tank. Due to the aeration and stirring effect inside the tank, the phenomenon of wastewater short-circuiting is avoided.

[0011] The water then enters a biological sedimentation tank. After sedimentation, any remaining sludge is filtered through a subsequent long-fiber filter before being discharged in compliance with standards. The effluent meets the Class I standard of the "Integrated Wastewater Discharge Standard".

[0012] In the above scheme: a vertical guide plate is installed in the middle of the anaerobic tank, and there is a gap between the bottom of the vertical guide plate and the bottom of the anaerobic tank to allow water to pass through. The vertical guide plate divides the anaerobic tank, and water passes through the bottom of the vertical guide plate, preventing wastewater short-circuiting from affecting the reaction effect.

[0013] In the above scheme: the anaerobic tank effluent well and the hydrolysis acidification biological filter bed are arranged side by side on the same side of the tank, and there is a gap between the top of the partition between the anaerobic tank effluent well and the hydrolysis acidification biological filter bed and the top plate of the tank for water to be fed into the hydrolysis acidification biological filter bed.

[0014] In the above scheme: the inlet artificial bar screen is a basket-type bar screen; the anaerobic tank inlet well and the biological sedimentation tank are arranged side by side, one in front and one behind; and the contact oxidation reaction tank is located in the middle of the upper layer of the tank. Waste and debris are trapped in the bar screen basket and cleaned regularly.

[0015] In the above scheme: the aeration device is a U-shaped device formed by micro-nano aeration tubes, and the aeration device is connected to an air pump via an air pipe. The air pump is a 12V low-voltage air pump. Micro-nano aeration tubes are generally used in fish ponds. Since the aeration pressure that the contact oxidation tank of this invention can withstand is not large, this device can use a 12V low-voltage air pump for aeration and can achieve a good treatment effect.

[0016] The above solution also includes a micro-power generation module to provide power to the low-voltage air pump, along with a corresponding transformer. The micro-power generation module consists of a solar panel, a wind turbine, a controller, dedicated solar cells, a support system, and dedicated solar power lines. This is existing technology. After generating electricity, it is converted into a 12V low voltage for the air pump via the transformer. This is a conventional setup and not the inventive point of this utility model.

[0017] In the above scheme: there is a gap between the bottom end of the partition connecting the contact oxidation reaction tank and the bottom of the biological sedimentation tank to allow water to flow through. An inclined three-phase separation plate is provided at the lower end of the partition. The bottom end of the three-phase separation plate is inclined towards the biological sedimentation tank. A sludge inclined plate is provided at the bottom of the biological sedimentation tank and on the side away from the contact oxidation reaction tank. The bottom end of the sludge inclined plate extends to a position close to the bottom of the three-phase separation plate. There is a gap between the sludge inclined plate and the three-phase separation plate for water supply and sludge flow.

[0018] After the sludge and wastewater mixture in the contact oxidation tank passes through this area, the air in the contact oxidation tank returns to the contact oxidation tank under the action of the three-phase separation plate. The sludge and water enter the biological sedimentation tank. Due to the small size of the device and the biological sedimentation tank, a sludge inclined plate is set on one side opposite the three-phase separation plate. Under the action of the sludge inclined plate, the sludge flows back to the contact oxidation tank by gravity, without any power to return the sludge. The scum is intercepted by the three-phase separation plate, and the supernatant flows out. Through the combination of the above devices, the separation of air, sludge, and water can be achieved, ensuring that the effluent consistently meets the standards.

[0019] In the above scheme: a long-haired fiber filter is installed on the upper part of one side of the biological sedimentation tank. The bottom of the long-haired fiber filter is connected to the biological sedimentation tank, and the drain outlet is connected to the effluent side of the long-haired fiber filter. Long-haired fiber filter cloth is installed inside the long-haired fiber filter. In the effluent outlet area, in order to reduce the concentration of suspended solids in the effluent, a long-haired fiber filter cloth is added to the effluent outlet area. This can simultaneously intercept suspended solids in the effluent, and a certain amount of microorganisms are attached to the fibers, which can further remove organic matter in the wastewater, thus further ensuring the quality of the effluent.

[0020] In the above scheme: the height of the container is 1.5-2.5m, the depth of the anaerobic tank is 0.8-1.5m, and the depth of the upper layer is 0.7-1m. It has a small volume.

[0021] Beneficial effects:

[0022] This invention employs an AAO+MBBR process. AAO is a commonly used activated sludge process with relatively high effluent quality, primarily utilizing microorganisms to degrade organic matter while purifying wastewater through aeration. It boasts advantages such as good treatment effect, stable operation, and low cost. The design of this device fully considers the characteristics of anaerobic, anoxic, and aerobic tanks, placing the anaerobic tank at the bottom for more effective air isolation. Aeration in the anoxic tank is achieved by water flowing from the top into the hydrolysis acidification biological filter bed, creating an anaerobic environment. The aerobic tank is located at the top, with a shallow depth and low aeration pressure, enabling micro-powered aeration. Finally, a power generation unit is added for micro-powered treatment, addressing the shortcomings in rural single-household domestic sewage treatment and contributing to improved living environments. The facilities and equipment are simple, compact, and have low operating costs. The effluent meets the Class I standard of the "Integrated Wastewater Discharge Standard" and can be directly discharged into water bodies. Attached Figure Description

[0023] Figure 1 This is a top view of the present invention.

[0024] Figure 2 This is a cross-sectional view of the lower layer of this utility model.

[0025] Figure 3 for Figure 1 AA cross-section view.

[0026] Figure 4 for Figure 1 BB cross-section.

[0027] Figure 5 for Figure 1 CC cross-section view. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] In this utility model, directional terms such as up, down, left, right, front, and back represent relative positions in the diagram and do not indicate the absolute position of the product.

[0030] Example 1

[0031] like Figure 1-5 As shown, the small-scale integrated micro-powered treatment equipment for rural domestic sewage includes a housing 1, which is 1.5-2.5m high. Its length and width are designed according to the treatment capacity. Generally, a single treatment unit can handle about one ton per day (suitable for individual households or a small number of households clustered together). A length of about 1m and a width of 70cm is sufficient. Of course, the above dimensions are just an example and can be adjusted according to the treatment capacity in actual application. The housing 1 can be made of stainless steel or plastic. The housing 1 is divided into two layers by horizontal partitions. The lower layer is an anaerobic tank 2 with a depth of 0.8-1.5m, and the upper layer has a depth of 0.7-1m. An anaerobic tank inlet well 3, connected to the anaerobic tank 2, is located on one side of the upper layer. In the figure, the anaerobic tank inlet well 3 is located on the right rear side. An inlet manual screen frame 10 is installed along the side of the anaerobic tank inlet well 3, located at the rear of the anaerobic tank inlet well 3 in the figure. A water inlet 8 is provided at the position corresponding to the water inlet manual bar frame 10. The water inlet manual bar frame 10 is a basket-type bar, which is convenient for cleaning debris.

[0032] On the side opposite to the anaerobic tank inlet well 3, there is an anaerobic tank outlet well 4 connected to the anaerobic tank 2, located at the left front corner of the figure. A vertical flow guide plate 201 is installed in the middle of the anaerobic tank 2, with a gap between the bottom of the vertical flow guide plate 201 and the bottom of the anaerobic tank 2 to allow water to pass through. The vertical flow guide plate 201 divides the anaerobic tank into two tanks, preventing short-circuiting from affecting the reaction effect.

[0033] The upper part of the tank 1 is divided into a hydrolysis-acidification biological filter bed 5, a contact oxidation reaction tank 6, and a biological sedimentation tank 7. The hydrolysis-acidification biological filter bed 5 is connected to the top of the anaerobic tank inlet well 3. The bottom of the hydrolysis-acidification biological filter bed 5 is provided with a water passage hole 501 connected to the contact oxidation reaction tank 6. The hydrolysis-acidification biological filter bed 5 is filled with ceramsite packing. The bottom of the contact oxidation reaction tank 6 is provided with an aeration device 13 and suspended MBBR biological packing (not shown in the figure). The aeration device 13 is located at the bottom of the tank, and the MBBR suspended packing is suspended in the water. The inlet and outlet of the contact oxidation reaction tank are located at opposite corners of the bottom of the tank. The contact oxidation reaction tank 6 is connected to the biological sedimentation tank 7, and the biological sedimentation tank 7 is provided with a drain outlet 9. Specifically, the anaerobic tank effluent well 4 and the hydrolysis-acidification biological filter bed 5 are arranged side by side on the same side of the tank 1, on the left side of the figure. There is a gap between the top of the partition between the anaerobic tank effluent well 4 and the hydrolysis acidification biological filter bed 5 and the top plate of the tank body, allowing water to be pumped to the hydrolysis acidification biological filter bed 5. The anaerobic tank influent well 3 and the biological sedimentation tank 7 are arranged side by side, one behind the other, and the contact oxidation reaction tank 6 is located in the middle of the upper layer of the tank body 1. With this arrangement, wastewater flows by gravity from the top of the anaerobic tank into the upper left corner of the anoxic biological ceramsite filter bed, gradually flowing through the ceramsite filter bed in this area, and then enters the next unit, the contact oxidation reaction tank, through the bottom holes in the lower right corner.

[0034] The micro / nano aeration device 13 is a loop-shaped device formed by micro / nano aeration tubes. The aeration device is connected to an air pump (not shown in the diagram) via an air pipe. The air pump is a 12V low-voltage air pump. A micro-power generation module and a corresponding transformer can be provided to the air pump to supply power to the low-voltage air pump. The micro-power generation module and the corresponding transformer are existing designs. Alternatively, the micro-power generation module and the corresponding transformer can be omitted, and a battery can be used directly to supply power to the air pump.

[0035] A gap exists between the bottom of the baffle connecting the contact oxidation reactor 6 and the bottom of the biological sedimentation tank 7, allowing water to flow through. An inclined three-phase separation plate 11 is installed at the lower end of this baffle, with its bottom inclined towards the biological sedimentation tank 7. A sludge inclined plate 12 is installed at the bottom of the biological sedimentation tank 7 and on the side furthest from the contact oxidation reactor 6, with its bottom extending near the bottom of the three-phase separation plate 11. A gap exists between the sludge inclined plate 12 and the three-phase separation plate 11 for water supply and sludge flow. A long-fiber filter 14 is installed on the upper part of one side of the biological sedimentation tank 7, located on the right front side of the figure. The bottom of the long-fiber filter 14 is connected to the biological sedimentation tank 7, and the drain outlet 9 is connected to the effluent side of the long-fiber filter 14, i.e., the upper side of the long-fiber filter 14. Water enters from the lower side and exits from the upper side, achieving a filtration effect. Long-fiber filter cloth is installed inside the long-fiber filter 14.

[0036] Rural domestic sewage, after being intercepted by an inlet manual bar screen to remove large debris, enters the anaerobic tank located at the bottom of the tank. Compared to the current flat-lay integrated devices, the anaerobic tank better isolates air, creating an anaerobic environment. The sewage ferments within the anaerobic ammoniation reaction module, converting large organic molecules into smaller ones or producing gases such as methane and hydrogen, laying the foundation for subsequent biological treatment units. Water from the anaerobic tank flows through the effluent well, turning upwards from the top. During this turning process, it comes into contact with air, effectively creating an anoxic environment within the hydrolysis-acidification biological filter bed. Ceramsite packing is placed within the hydrolysis-acidification biological filter bed. The numerous pores within the ceramsite provide ample growth space for microorganisms and also achieve a dual function of filtration and interception. After passing through this unit, the organic matter content in the wastewater is further reduced. Wastewater flows by gravity from the top of the anaerobic tank into the upper left corner of the anoxic biological ceramsite filter bed, gradually flowing through the ceramsite filter bed in this area, and then enters the next unit contact oxidation reaction tank from the bottom holes in the lower right corner.

[0037] In the contact oxidation reactor, air is pumped into the water to maintain a certain concentration of dissolved oxygen, creating an environment suitable for aerobic organisms. The suspended MBBR biological packing material purifies the wastewater by cultivating microorganisms, degrading all organic matter into carbon dioxide and water, ultimately achieving compliant discharge. The water then enters a biological sedimentation tank. After sedimentation, any remaining sludge or scum is filtered through a subsequent long-fiber filter before being discharged in compliance with standards. The effluent meets the Class I standard of the "Integrated Wastewater Discharge Standard".

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A small-scale, micro-powered integrated treatment device for rural domestic sewage, comprising a housing (1), characterized in that: The box (1) is divided into two layers by a horizontal partition. The lower layer is an anaerobic tank (2). An anaerobic tank inlet well (3) connected to the anaerobic tank (2) is set on one side of the upper layer. An artificial bar screen (10) is set on the side of the anaerobic tank inlet well (3). An inlet (8) is set on the position corresponding to the artificial bar screen (10). An anaerobic tank outlet well (4) connected to the anaerobic tank (2) is set on the side opposite to the anaerobic tank inlet well (3). The upper layer of the box (1) is divided into a hydrolysis acidification biological filter bed (5) and a contact oxidation reaction tank (5). 6) and a biological sedimentation tank (7), wherein the hydrolysis acidification biological filter (5) is connected to the top of the anaerobic tank inlet well (3), the bottom of the hydrolysis acidification biological filter (5) is provided with a water passage hole (501) connected to the contact oxidation reaction tank (6), the hydrolysis acidification biological filter (5) is filled with ceramsite filler, the bottom of the contact oxidation reaction tank (6) is provided with an aeration device (13) and suspended MBBR biological filler, the contact oxidation reaction tank (6) is connected to the biological sedimentation tank (7), and the biological sedimentation tank (7) is provided with a drain outlet (9).

2. The integrated small-scale micro-powered treatment equipment for rural domestic sewage according to claim 1, characterized in that: A vertical guide plate (201) is provided in the middle of the anaerobic tank (2), and there is a gap between the bottom end of the vertical guide plate (201) and the bottom of the anaerobic tank (2) to allow water to pass through.

3. The integrated micro-powered rural domestic sewage treatment equipment according to claim 1 or 2, characterized in that: The anaerobic pool effluent well (4) and the hydrolysis acidification biological filter bed (5) are arranged side by side on the same side of the box body (1). There is a gap between the top of the partition between the anaerobic pool effluent well (4) and the hydrolysis acidification biological filter bed (5) and the top plate of the box body for water to be turned over to the hydrolysis acidification biological filter bed (5).

4. The integrated small-scale micro-powered treatment equipment for rural domestic sewage according to claim 3, characterized in that: The inlet artificial bar screen (10) is a basket-type bar screen. The anaerobic pool inlet well (3) and the biological sedimentation tank (7) are arranged side by side, one in front and one behind. The contact oxidation reaction tank (6) is located in the middle of the upper layer of the box (1).

5. The integrated small-scale micro-powered treatment equipment for rural domestic sewage according to claim 4, characterized in that: The aeration device (13) is a loop-shaped device formed by micro-nano aeration tubes. The aeration device is connected to an air pump through an air pipe. The air pump is a 12V low-voltage air pump.

6. The integrated small-scale micro-powered treatment equipment for rural domestic sewage according to claim 5, characterized in that: It is also equipped with a micro-power generation module that provides power to the low-voltage air pump and a corresponding transformer.

7. The integrated small-scale micro-powered treatment equipment for rural domestic sewage according to claim 1, characterized in that: There is a gap between the bottom end of the partition connecting the contact oxidation reaction tank (6) and the bottom of the biological sedimentation tank (7) for water to flow through. An inclined three-phase separation plate (11) is provided at the lower end of the partition. The bottom end of the three-phase separation plate (11) is inclined towards the biological sedimentation tank (7). A sludge inclined plate (12) is provided on the side of the bottom of the biological sedimentation tank (7) away from the contact oxidation reaction tank (6). The bottom end of the sludge inclined plate (12) extends to a position close to the bottom of the three-phase separation plate (11). There is a gap between the sludge inclined plate (12) and the three-phase separation plate (11) for water supply and sludge flow.

8. The integrated small-scale micro-powered treatment equipment for rural domestic sewage according to claim 7, characterized in that: A long-haired fiber filter (14) is provided on the upper side of one side of the biological sedimentation tank (7). The bottom of the long-haired fiber filter (14) is connected to the biological sedimentation tank (7). The drain outlet (9) is connected to the effluent side of the long-haired fiber filter (14). A long-haired fiber filter cloth is provided inside the long-haired fiber filter (14).

9. The integrated micro-powered rural domestic sewage treatment equipment according to claim 8, characterized in that: The height of the box (1) is 1.5-2.5m, the depth of the anaerobic tank is 0.8-1.5m, and the depth of the upper layer is 0.7-1m.

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