A leachate biochemical treatment device and leachate treatment system for a waste transfer station

Abstract

The utility model relates to waste liquid treatment technical field especially relates to a kind of landfill transfer station leachate biochemical treatment device and leachate processing system, including first anoxic pool, first aerobic tank, second anoxic pool, second aerobic tank and sedimentation tank communicated by connecting port in turn, biological rope filling assembly is fixedly arranged in the first anoxic pool, and first submersible mixer is equipped in the first anoxic pool;First micropore aeration pipe is fixedly arranged in the inner chamber bottom of first aerobic tank, and suspended filling assembly is filled in the first aerobic tank, second submersible mixer is equipped in the second anoxic pool, and sludge discharge port is equipped in the bottom of sedimentation tank.The utility model avoids using membrane component, and wastewater is treated by biological rope filling assembly and suspended filling assembly, and aerobic, anoxic and anaerobic environment is formed on filling material, nitrification and denitrification reaction can occur in one reaction tank, and the removal of ammonia nitrogen has good effect, and the treatment efficiency of organic matter is improved.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, and in particular to a biochemical treatment device and leachate treatment system for waste transfer stations. Background Technology

[0002] Currently, leachate treatment systems at waste transfer stations often employ a combined process of "bar screen + oil separator + equalization tank + advanced oxidation + biochemical treatment + MBR". The core processes for leachate treatment are advanced oxidation and MBR (membrane bioreactor). Advanced oxidation mainly improves the biodegradability of wastewater or directly removes recalcitrant organic components. MBR is a water treatment technology that organically combines membrane separation technology with biotechnology. It uses membrane separation equipment to retain activated sludge and large molecular organic matter in the biochemical reaction tank, eliminating the need for a sedimentation tank.

[0003] This combined process mainly employs pre-treatment advanced oxidation. Due to the high levels and concentrations of various indicators in the leachate at the front end, a large amount of reagents needs to be added to the advanced oxidation reaction, which increases both operating costs and the intensity of manual labor.

[0004] This combined process utilizes MBR technology to treat pollutants, but it also presents certain challenges. The project primarily employs both internal and external methods. Regardless of the method, the engineering investment is substantial: firstly, the high cost of membrane modules increases the overall investment by approximately 30%-50% compared to conventional treatment methods; secondly, energy consumption is high: the membrane drive pressure for sludge-water separation requires a separate pump set, and the MBR membrane modules require blowers to provide high-intensity aeration to mitigate membrane fouling; thirdly, membrane fouling necessitates frequent cleaning, which can be achieved through methods such as backwashing with clean water, chemical cleaning, and offline cleaning, all of which are complex and labor-intensive; and fourthly, the lifespan of MBR membrane modules is limited, typically around 3 years. After this period, the permeate flux and quality will be affected, necessitating replacement and increasing operating and maintenance costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a biological treatment device and leachate treatment system for waste transfer stations, which overcomes the problems of high investment, high energy consumption, frequent cleaning and periodic replacement of MBR process.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A biochemical treatment device for leachate from a garbage transfer station includes a first anoxic tank, a first aerobic tank, a second anoxic tank, a second aerobic tank, and a sedimentation tank connected sequentially through a connection port. A biological rope packing assembly is fixedly installed in the first anoxic tank, and a first submersible mixer is installed inside the first anoxic tank. A first microporous aeration pipe is fixedly installed at the bottom of the inner cavity of the first aerobic tank, and the first aerobic tank is filled with a suspended packing assembly. The first aerobic tank is connected to the first anoxic tank through a first return pipe, and a return water pump is installed on the first return pipe. A second submersible mixer is installed in the second anoxic tank, and a second microporous aeration pipe is fixedly installed at the bottom of the inner cavity of the second aerobic tank. A sludge discharge outlet is provided at the bottom of the sedimentation tank, and the sludge discharge outlet is connected to the first anoxic tank and the second anoxic tank through a second return pipe, and a sludge circulation pump is installed on the second return pipe.

[0007] The beneficial effects of this invention are as follows: This invention avoids the use of membrane modules and achieves wastewater treatment through biological rope packing modules and suspended packing modules. It is easy for membranes to attach, does not clump, does not clog, and is easy to detach. At the same time, aerobic, anoxic, and anaerobic environments are formed on the packing, and nitrification and denitrification reactions can occur in one reaction tank, which has a good effect on the removal of ammonia nitrogen. The sludge concentration in the reaction tank is high, generally 5 to 10 times that of ordinary activated sludge processes, which improves the treatment efficiency of organic matter and has strong resistance to shock loads.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the bio-rope packing assembly includes bio-rope packing and a first connecting frame and a second connecting frame fixedly disposed at intervals within the first anoxic pool, with both ends of the plurality of bio-rope packings respectively fixedly connected to the first connecting frame and the second connecting frame.

[0010] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the installation and setting of the biological rope filler.

[0011] Furthermore, the suspended packing assembly includes an upper packing interceptor plate and a lower packing interceptor plate arranged at vertical intervals. Both the upper and lower packing interceptor plates are uniformly provided with multiple water-permeable holes. The periphery of the upper and lower packing interceptor plates is fixedly connected to the inner wall of the first aerobic tank. Suspended packing is filled between the upper and lower packing interceptor plates.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the suspended packing is limited by the upper packing interceptor plate and the lower packing interceptor plate, which prevents the suspended packing from moving with the water flow during the aeration process, affecting the uniformity of the suspended packing and thus affecting the sewage treatment effect.

[0013] Furthermore, multiple partitions are evenly spaced between the upper packing interceptor plate and the lower packing interceptor plate. The two ends of each partition are fixedly connected to the upper packing interceptor plate and the lower packing interceptor plate, respectively. The multiple partitions divide the space between the upper packing interceptor plate and the lower packing interceptor plate into multiple regions, and the suspended packing fills each region.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the arrangement of multiple baffles can further ensure the uniformity of the suspended packing.

[0015] Furthermore, the material of the suspended filler is polyurethane.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: the suspended packing is made of polyurethane material, with a specific gravity close to that of water, and is mainly cylindrical, which makes it easy for biofilm to form. It does not clump, does not clog, and is easy to detach. Under normal circumstances, the packing can be used stably for more than ten years without replacement.

[0017] Furthermore, an overflow weir is fixedly provided in the upper part of the inner cavity of the sedimentation tank, and an overflow port is provided on the overflow weir for connecting the upper and lower spaces of the overflow weir. A vertically arranged central cylinder is provided in the middle of the sedimentation tank, and the central cylinder is fixedly connected to the overflow weir. The top of the central cylinder passes through and extends out of the overflow weir and is connected to one end of a connecting pipe. The other end of the connecting pipe is connected to the upper part of the second aerobic tank. A drain outlet is provided in the upper part of the sedimentation tank, and the drain outlet is located above the overflow weir.

[0018] The beneficial effects of adopting the above-mentioned further scheme are as follows: wastewater enters the sedimentation tank from top to bottom through the central cylinder located in the center of the sedimentation tank. The suspended solids in the wastewater settle into the bottom of the sedimentation tank, and the clarified water flows out from the overflow outlet along the tank. The direction of water flow is opposite to the direction of particle sedimentation, and its interception velocity is equal to the upward velocity of the water flow. Particles with an upward velocity equal to the settling velocity will be suspended in the mixed liquid to form a suspended layer, which intercepts and filters the rising particles, thereby improving the sedimentation efficiency.

[0019] Furthermore, the bottom of the sedimentation tank is provided with a sludge hopper, the top of the sludge hopper is fixedly connected to the bottom of the sedimentation tank, and the sludge discharge outlet is located at the bottom of the sludge hopper.

[0020] The beneficial effects of adopting the above-mentioned further scheme are: the setting of the sludge hopper can improve the concentration of the settled sludge and facilitate the removal of the settled sludge.

[0021] Furthermore, a flared mouth is fixedly connected to the bottom end of the central cylinder, and an umbrella-shaped diverter plate is fixedly connected to the bottom end of the central cylinder through a connecting frame.

[0022] The beneficial effect of adopting the above-mentioned further solution is that it enables the sewage flowing out of the central cylinder to extend evenly to the periphery, which facilitates the deposition of sludge in the sewage.

[0023] This utility model, in order to solve the above-mentioned technical problems, also provides a leachate treatment system for a waste transfer station, including a bar screen, an oil separator, an equalization tank, an air flotation device, a hydrolysis acidification device, a deep treatment system, a sludge treatment device, and a waste transfer station leachate biochemical treatment device. The bar screen, the oil separator, the equalization tank, the air flotation device, the hydrolysis acidification device, the waste transfer station leachate biochemical treatment device, and the deep treatment system are connected in sequence. The sludge outlet of the air flotation device, the sludge outlet of the hydrolysis acidification device, the sludge outlet of the sedimentation tank, and the sludge outlet of the deep treatment system are all connected to the sludge treatment device.

[0024] The beneficial effects of adopting the above scheme are as follows: the collected leachate is filtered by a screen to intercept impurities; the oil separator mainly uses the principle that oil is lighter than water to remove floating oil from the leachate; the equalization tank achieves homogenization and equalization of quantity; the air flotation device mainly removes suspended solids in the wastewater, ensuring the normal operation of the subsequent treatment system; then, through the hydrolysis acidification device, some organic matter is degraded, converting difficult-to-degrade large-molecule organic matter into easily degradable small-molecule organic matter, thereby improving the biodegradability of the wastewater; and then, after treatment by the leachate biological treatment device at the garbage transfer station and the advanced treatment system, the wastewater is effectively treated.

[0025] Furthermore, the sludge treatment device's discharge port is connected to the equalization tank via a pipe.

[0026] The beneficial effect of adopting the above-mentioned further solution is that it enables the recycling of the waste liquid and reduces the cost of water resource use. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0028] Figure 2 This is a schematic diagram of the upper filler interceptor plate in Embodiment 1 of this utility model;

[0029] Figure 3 This is a connection diagram of Embodiment 2 of the present invention;

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 100. Biological treatment device for leachate from a waste transfer station; 1. First anoxic tank; 2. First aerobic tank; 3. Second anoxic tank; 4. Second aerobic tank; 5. Sedimentation tank; 5-1. Overflow weir; 5-2. Overflow outlet; 5-3. Central cylinder; 5-4. Connecting pipe; 5-5. Sludge hopper; 5-6. Trumpet-shaped inlet; 5-7. Umbrella-shaped diversion plate; 6. Bio-rope packing assembly; 6-1. Bio-rope packing; 6-2. First connecting frame; 6-3. Second connecting frame; 7. First submersible mixer; 8. Microporous aeration pipe; 9. Suspended packing assembly ; 9-1, Upper packing interceptor plate; 9-2, Lower packing interceptor plate; 9-3, Permeable holes; 9-4, Suspended packing; 9-5, Baffle plate; 10, First return pipe; 11, Return water pump; 12, Second submersible mixer; 13, Sludge discharge outlet; 14, Second return pipe; 15, Sludge circulation pump; 16, Second microporous aeration pipe; 200, Bar screen; 300, Oil separator; 400, Equalization tank; 500, Air flotation device; 600, Hydrolysis acidification device; 700, Deep treatment system; 800, Sludge treatment device. Detailed Implementation

[0032] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0033] Example 1

[0034] like Figure 1As shown, this embodiment discloses a biochemical treatment device 100 for leachate from a waste transfer station, comprising a first anoxic tank 1, a first aerobic tank 2, a second anoxic tank 3, a second aerobic tank 4, and a sedimentation tank 5 connected sequentially through a connection port. In this embodiment, the upper part of the first anoxic tank 1 is connected to the upper part of the first aerobic tank 2, the upper part of the first aerobic tank 2 is connected to the upper part of the second anoxic tank 3, the upper part of the second anoxic tank 3 is connected to the upper part of the second aerobic tank 4, and the upper part of the second aerobic tank 4 is connected to the upper part of the sedimentation tank 5. The specific connection method can be through a connection port or through a water pump. The first anoxic tank 1 is equipped with a fixed biological rope packing assembly 6 and a first submersible mixer 7. The submersible mixer 7 is located at the bottom of the inner cavity of the first anoxic tank 1. This allows for effective attachment of microorganisms to the packing material and ensures proper mixing of wastewater and sludge, preventing sedimentation at the bottom of the tank and maintaining a suitable anoxic environment for denitrification. The first aerobic tank 2 is equipped with a fixed microporous aeration pipe 8 at the bottom of its inner cavity. The first aerobic tank 2 is filled with a suspended packing assembly 9. The first aerobic tank 2 is connected to the first anoxic tank 1 via a first return pipe 10. A return water pump 11 is provided on the first return pipe 10. The two ends of the first return pipe 10 are respectively connected to the upper part of the first aerobic tank 2 and the first anoxic tank 1. A second submersible mixer 12 is provided in the second anoxic tank 3. The second submersible mixer 12 is located at the bottom of the inner cavity of the second anoxic tank 3. A second microporous aeration pipe 16 is fixedly provided at the bottom of the inner cavity of the second aerobic tank 4. A sludge discharge outlet 13 is provided at the bottom of the sedimentation tank 5. The sludge discharge outlet 13 is connected to the first anoxic tank 1 and the second anoxic tank 3 through the second return pipe 14. A sludge circulation pump 15 is provided on the second return pipe 14.

[0035] In this embodiment, the bio-rope packing assembly 6 includes bio-rope packing 6-1 and a first connecting frame 6-2 and a second connecting frame 6-3 fixedly arranged at intervals in the first anoxic pool 1. The two ends of the multiple bio-rope packings 6-1 are respectively fixedly connected to the first connecting frame 6-2 and the second connecting frame 6-3, which facilitates the installation of the bio-rope packings 6-1.

[0036] The suspended packing assembly 9 includes an upper packing interceptor plate 9-1 and a lower packing interceptor plate 9-2 arranged at an upper and lower interval. The lower packing interceptor plate 9-2 is located above the first microporous aeration pipe 8. The upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 have the same structure, as shown in the specific structure below. Figure 2As shown, the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 can be fixed to the inner wall of the first aerobic tank 2 via L-shaped connectors. Both the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 are evenly provided with multiple permeable holes 9-3. The periphery of the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 is fixedly connected to the inner wall of the first aerobic tank 2. Suspended packing material 9-4 is filled between the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2. The upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 limit the movement of the suspended packing material 9-4 during aeration, preventing it from moving with the water flow and affecting the uniformity of its filling, thus impacting the wastewater treatment effect.

[0037] Multiple partitions 9-5 are evenly spaced between the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2. The two ends of each partition 9-5 are fixedly connected to the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 respectively via L-shaped connectors. The multiple partitions 9-5 divide the space between the upper packing interceptor plate 9-1 and the lower packing interceptor plate 9-2 into multiple regions, and the suspended packing 9-4 is filled in each of these regions. The arrangement of multiple partitions 9-5 further ensures the uniformity of the filling of the suspended packing 9-4.

[0038] The suspended packing material 9-4 is made of polyurethane. The suspended packing material 9-4 is made of polyurethane, has a specific gravity close to that of water, is mainly cylindrical, facilitates biofilm formation, does not clump or clog, and is easy to detach. Under normal circumstances, the packing material can be used stably for more than ten years without replacement.

[0039] An overflow weir 5-1 is fixedly provided in the upper part of the inner cavity of the sedimentation tank 5. An overflow port 5-2 for connecting the upper and lower spaces of the overflow weir 5-1 is provided on the overflow weir 5-1. A vertically arranged central cylinder 5-3 is provided in the middle of the sedimentation tank 5. The central cylinder 5-3 is fixedly connected to the overflow weir 5-1. The top of the central cylinder 5-3 passes through and extends out of the overflow weir 5-1 and is connected to one end of the connecting pipe 5-4. The other end of the connecting pipe 5-4 is connected to the upper part of the second aerobic tank 4. A drain outlet is provided in the upper part of the sedimentation tank 5. The drain outlet is located above the overflow weir 5-1. Wastewater enters the space below the overflow weir 5-1 in the sedimentation tank 5 from top to bottom through the central cylinder 5-3 located in the center of the sedimentation tank 5. Suspended solids in the wastewater settle into the bottom of the sedimentation tank 5. Clarified water flows out from the overflow outlet 5-2 along the tank edge to the top of the overflow weir 5-1, and then is discharged from the sedimentation tank 5 through the drain outlet. The direction of water flow is opposite to the direction of particle settling, and its interception velocity is equal to the upward velocity of the water flow. Particles with an upward velocity equal to the settling velocity will be suspended in the mixed liquid to form a suspended layer, which intercepts and filters the rising particles, thereby improving the sedimentation efficiency.

[0040] In an embodiment of this utility model, in order to improve the sedimentation efficiency in the sedimentation tank 5, flocculant can be added to the sedimentation tank 5. To facilitate the addition of flocculant, a pipe can be inserted into the sedimentation tank 5, and the pipe is connected to the dosing tank. The flocculant in the dosing tank is added to the sedimentation tank 5 by the action of a water pump or gravity.

[0041] The sedimentation tank 5 has a sludge hopper 5-5 at its bottom, and the top of the sludge hopper 5-5 is fixedly connected to the bottom of the sedimentation tank 5. The sludge discharge outlet 13 is located at the bottom of the sludge hopper 5-5. The sludge hopper 5-5 can improve the concentration of settled sludge and facilitate the discharge of settled sludge.

[0042] The bottom end of the central cylinder 5-3 is fixedly connected to a funnel-shaped opening 5-6, and the bottom end of the central cylinder 5-3 is fixedly connected to an umbrella-shaped diversion plate 5-7 via a connecting frame. This allows the wastewater flowing out of the central cylinder 5-3 to extend evenly to the surrounding area, facilitating the deposition of sludge in the wastewater.

[0043] Because the density of the suspended packing material 9-4 is close to that of water, it is completely mixed with water during aeration, creating a three-phase environment for microbial growth. The collision and shearing action of the suspended packing material 9-4 in the water makes the air bubbles smaller, increasing oxygen utilization. Furthermore, each suspended packing material 9-4 contains different biological species both inside and outside; anaerobic or facultative anaerobic bacteria grow inside, while aerobic bacteria grow on the outside. Thus, each suspended packing material 9-4 acts as a microreactor, allowing nitrification and denitrification to occur simultaneously, thereby improving treatment efficiency.

[0044] Example 2

[0045] like Figure 3As shown, this embodiment discloses a leachate treatment system for a waste transfer station, including a bar screen 200, an oil separator 300, an equalization tank 400, an air flotation device 500, a hydrolysis acidification device 600, a deep treatment system 700, a sludge treatment device 800, and a waste transfer station leachate biochemical treatment device 100. The bar screen 200, the oil separator 300, the equalization tank 400, the air flotation device 500, the hydrolysis acidification device 600, the waste transfer station leachate biochemical treatment device 100, and the deep treatment system 700 are connected in sequence. The sludge outlet of the air flotation device 500, the sludge outlet of the hydrolysis acidification device 600, the sludge discharge outlet 13 of the sedimentation tank 5, and the sludge outlet of the deep treatment system are all connected to the sludge treatment device 800. The collected leachate passes through a screen tank 200 to intercept impurities, an oil separator 300 to remove floating oil from the leachate by utilizing the principle that oil is lighter than water, an equalization tank 400 to achieve homogenization and equalization of volume, and an air flotation device 500 to remove suspended solids from the wastewater to ensure the normal operation of the subsequent treatment system. Then, through a hydrolysis acidification device 600, some organic matter is degraded, converting large, difficult-to-degrade organic molecules into smaller, easily degradable organic molecules, thereby improving the biodegradability of the wastewater. Finally, the wastewater undergoes further treatment by the leachate biological treatment device 100 at the garbage transfer station and the advanced treatment system 700, achieving effective wastewater treatment.

[0046] The sludge treatment device 800 has its discharge port connected to the equalization tank 400 via a pipe, enabling the recycling of the discharged liquid and reducing the cost of water resource use.

[0047] The principle of the advanced treatment device: Landfill leachate contains complex pollutants. Special molecular capture agents are used in combination with flocculation and sedimentation to remove soluble and strongly hydrophilic molecular substances that may be present in the wastewater. This reduces the hydrophilicity of soluble pollutants, thereby forming water-insoluble precipitates, achieving effective removal. As a backup process section, it ensures that the effluent meets the standards stably.

[0048] Process removal effect:

[0049]

[0050]

[0051] This embodiment employs a combined process of "grid tank 200 + oil separator 300 + equalization tank 400 + flotation device 500 + hydrolysis acidification device 600 + waste transfer station leachate biological treatment device 100 + advanced treatment". In the pretreatment stage, the collected leachate passes through the grid tank 200 to intercept impurities. The oil separator 300 primarily utilizes the principle that oil is lighter than water to remove floating oil from the leachate. The equalization tank 400 achieves homogenization and equalization. The flotation device 500 mainly removes suspended solids from the wastewater, ensuring the normal operation of the subsequent treatment system. After pretreatment, the leachate passes through the hydrolysis acidification device 600 to degrade some organic matter, converting recalcitrant large organic molecules into easily degradable small organic molecules, thereby improving the biodegradability of the wastewater. After the initial stage treatment, the leachate is further treated by the waste transfer station leachate biological treatment device 100. The advanced treatment serves as a backup process to address changes in the quality of the wastewater from the initial stage. The residual sludge generated in each reaction stage is treated by a sludge treatment device 800, and the resulting sludge cake is transported off-site for disposal. The effluent meets the Class III discharge standard of the "Integrated Wastewater Discharge Standard" (GB8978-1996) and the Class B standard in Table 1 of the "Water Quality Standard for Wastewater Discharge into Urban Sewerage Systems" (GB31962-2015), and is finally discharged into the municipal sewage network.

[0052] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", 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 utility model and simplifying the description, and do not indicate or imply that the system 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 utility model.

[0053] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A biochemical treatment device for leachate from a waste transfer station, characterized in that, The system includes a first anoxic tank (1), a first aerobic tank (2), a second anoxic tank (3), a second aerobic tank (4), and a sedimentation tank (5), which are connected sequentially through a connection port. A biological rope packing assembly (6) is fixedly installed inside the first anoxic tank (1), and a first submersible mixer (7) is installed inside the first anoxic tank (1). A first microporous aeration pipe (8) is fixedly installed at the bottom of the inner cavity of the first aerobic tank (2), and a suspended packing assembly (9) is filled inside the first aerobic tank (2). The first aerobic tank (2) is connected to the first anoxic tank (3) via a first return pipe (10). An anoxic tank (1) is connected, and a return water pump (11) is provided on the first return pipe (10); a second submersible mixer (12) is provided in the second anoxic tank (3); a second microporous aeration pipe (16) is fixedly provided at the bottom of the inner cavity of the second aerobic tank (4); a sludge discharge outlet (13) is provided at the bottom of the sedimentation tank (5); the sludge discharge outlet (13) is connected to the first anoxic tank (1) and the second anoxic tank (3) through the second return pipe (14); and a sludge circulation pump (15) is provided on the second return pipe (14).

2. The biological treatment device for leachate from a waste transfer station according to claim 1, characterized in that, The bio-rope packing assembly (6) includes bio-rope packing (6-1) and a first connecting frame (6-2) and a second connecting frame (6-3) fixedly arranged at intervals in the first anoxic pool (1). The two ends of the multiple bio-rope packings (6-1) are respectively fixedly connected to the first connecting frame (6-2) and the second connecting frame (6-3).

3. The biological treatment device for leachate from a waste transfer station according to claim 1, characterized in that, The suspended packing assembly (9) includes an upper packing interceptor plate (9-1) and a lower packing interceptor plate (9-2) arranged at an upper and lower interval. Both the upper packing interceptor plate (9-1) and the lower packing interceptor plate (9-2) are uniformly provided with a plurality of water-permeable holes (9-3). The periphery of the upper packing interceptor plate (9-1) and the lower packing interceptor plate (9-2) is fixedly connected to the inner wall of the first aerobic tank (2). Suspended packing material (9-4) is filled between the upper packing interceptor plate (9-1) and the lower packing interceptor plate (9-2).

4. The biological treatment device for leachate from a waste transfer station according to claim 3, characterized in that, Multiple partitions (9-5) are evenly spaced between the upper packing interceptor plate (9-1) and the lower packing interceptor plate (9-2). The two ends of each partition (9-5) are fixedly connected to the upper packing interceptor plate (9-1) and the lower packing interceptor plate (9-2), respectively. The multiple partitions (9-5) divide the space between the upper packing interceptor plate (9-1) and the lower packing interceptor plate (9-2) into multiple regions, and the suspended packing (9-4) fills each of the regions.

5. A biological treatment device for leachate from a waste transfer station according to claim 3, characterized in that, The suspended filler (9-4) is made of polyurethane.

6. The biological treatment device for leachate from a waste transfer station according to claim 1, characterized in that, An overflow weir (5-1) is fixedly provided in the upper part of the inner cavity of the sedimentation tank (5). An overflow port (5-2) for connecting the upper and lower spaces of the overflow weir (5-1) is provided on the overflow weir (5-1). A vertically arranged central cylinder (5-3) is provided in the middle of the sedimentation tank (5). The central cylinder (5-3) is fixedly connected to the overflow weir (5-1). The top of the central cylinder (5-3) passes through and extends out of the overflow weir (5-1) and is connected to one end of the connecting pipe (5-4). The other end of the connecting pipe (5-4) is connected to the upper part of the second aerobic tank (4). A drain outlet is provided in the upper part of the sedimentation tank (5). The drain outlet is located above the overflow weir (5-1).

7. A biochemical treatment device for leachate from a waste transfer station according to claim 6, characterized in that, The sedimentation tank (5) is provided with a sludge hopper (5-5) at the bottom. The top of the sludge hopper (5-5) is fixedly connected to the bottom of the sedimentation tank (5). The sludge discharge outlet (13) is located at the bottom of the sludge hopper (5-5).

8. A biochemical treatment device for leachate from a waste transfer station according to claim 6, characterized in that, The bottom end of the central cylinder (5-3) is fixedly connected to a flared mouth (5-6), and the bottom end of the central cylinder (5-3) is fixedly connected to an umbrella-shaped diverter plate (5-7) through a connecting frame.

9. A leachate treatment system for a waste transfer station, characterized in that, The system includes a bar screen (200), an oil separator (300), an equalization tank (400), an air flotation device (500), a hydrolysis acidification device (600), a deep treatment system (700), a sludge treatment device (800), and a waste transfer station leachate biochemical treatment device as described in any one of claims 1 to 8. The bar screen (200), the oil separator (300), the equalization tank (400), the air flotation device (500), the hydrolysis acidification device (600), the waste transfer station leachate biochemical treatment device, and the deep treatment system (700) are connected in sequence. The sludge outlet of the air flotation device (500), the sludge outlet of the hydrolysis acidification device (600), the sludge discharge outlet (13) of the sedimentation tank (5), and the sludge outlet of the deep treatment system are all connected to the sludge treatment device (800).

10. A leachate treatment system for a waste transfer station according to claim 9, characterized in that, The sludge treatment device (800) has its discharge port connected to the equalization tank (400) via a pipe.

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