Rural production wastewater resourceful treatment system based on MUCT process

Abstract

The utility model provides a rural production wastewater resourceful treatment system based on an MUCT process, and belongs to the technical field of sewage treatment. The device comprises an anaerobic tank, an anoxic reaction unit, an aerobic tank and a precipitation reaction tank which are sequentially connected in series, and the anoxic reaction unit comprises a first anoxic tank and a second anoxic tank which are connected in series; the bottom end of the precipitation reaction tank is connected with an anaerobic water inlet pipe of the anaerobic tank and a first anoxic water inlet pipe of the first anoxic tank through a first sludge return pipe and a second sludge return pipe respectively, a silt discharging assembly is further arranged in the precipitation reaction tank, and a first return pump and a second return pump are arranged on the first sludge return pipe and the second sludge return pipe respectively; the bottom end of the aerobic tank is connected with a second anoxic water inlet pipe of the second anoxic tank through a nitrification liquid return pipe and a third return pump, and an aeration device is arranged in the aerobic tank. The system is high in adaptability, and efficient and stable nitrogen and phosphorus removal effects can be achieved; the sludge at the bottom of the precipitation reaction tank is not adhered and caked, and the discharge and backflow efficiency of the sludge is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and relates to a rural production wastewater resource treatment system based on the MUCT process. Background Art

[0002] With the rapid development of China's economy and the continuous increase of population, the pollution degree of domestic sewage has gradually deepened, becoming one of the main reasons for water pollution in China. The traditional sewage treatment process has not achieved good treatment effects on nitrogen and phosphorus, and can no longer meet the current environmental protection requirements. The last step of the sewage treatment process is usually to separate and precipitate the treated sewage, and the supernatant is discharged as the final treated effluent. The precipitated sludge will accumulate at the bottom of the sedimentation area. If not treated in time, it will cause the sludge to stick and agglomerate, occupying the effective volume of the sedimentation area, resulting in a decrease in the treatment capacity of the sedimentation area, and then affecting the normal operation of the entire sewage treatment system. Content of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a rural production wastewater resource treatment system based on the MUCT process.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A rural production wastewater resource treatment system based on the MUCT process includes an anaerobic tank, an anoxic reaction unit, an aerobic tank, and a sedimentation reaction tank connected in series in sequence. The anoxic reaction unit includes a first anoxic tank and a second anoxic tank connected in series. The bottom end of the sedimentation reaction tank is respectively connected to the anaerobic water inlet pipe of the anaerobic tank and the first anoxic water inlet pipe of the first anoxic tank through a first sludge return pipe and a second sludge return pipe. A sludge discharge component is also provided in the sedimentation reaction tank. A first return pump and a second return pump are respectively provided on the first sludge return pipe and the second sludge return pipe. The bottom end of the aerobic tank is connected to the second anoxic water inlet pipe of the second anoxic tank through a nitrification liquid return pipe and a third return pump. An aeration device is provided in the aerobic tank.

[0006] This treatment system has strong adaptability, adopts an efficient sludge return method, can achieve efficient and stable nitrogen and phosphorus removal effects. The sludge discharge component in the sedimentation reaction tank helps the sludge to be returned and discharged, can effectively improve the sludge return efficiency, and avoid sludge accumulation. The aeration device in the aerobic tank can oxygenate the wastewater, providing sufficient dissolved oxygen for aerobic microorganisms to meet their metabolic needs.

[0007] In the above-mentioned rural production wastewater resource treatment system based on the MUCT process, an anaerobic return port is provided at the bottom end of the first anoxic tank, and the anaerobic return port is connected to the anaerobic water inlet pipe of the anaerobic tank through an anaerobic return pipe and a fourth return pump.

[0008] The mud-water mixture in the first anoxic tank can be returned to the anaerobic tank through the anaerobic return pipe and the fourth return pump to ensure the concentration of activated sludge in the anaerobic tank.

[0009] In the above-mentioned rural industrial wastewater resource treatment system based on the MUCT process, a silt removal tank is provided on one side of the bottom end of the sedimentation reaction tank, and the silt removal tank is respectively connected to the first sludge return pipe and the second sludge return pipe, and the silt removal component includes a silt removal air blowing plate arranged on the inner side wall of the sedimentation reaction tank away from the silt removal tank, and the silt removal air blowing plate is hollow and forms an air blowing air cavity, and a plurality of air blowing holes connected to the air blowing air cavity are evenly distributed on the side wall of the silt removal air blowing plate near the silt removal tank, and an air blowing head is provided on the air hole, and the air inlet end of the air blowing air cavity is connected to an external air blowing blower.

[0010] The external air blower is operated to deliver air to the air blowing chamber of the silt discharge blowing plate. The air enters the air blowing head through the air blowing holes and is ejected from the air blowing head to form a driving water flow to push the silt settled at the bottom of the sedimentation reaction tank. The silt can be quickly pushed into the silt discharge tank, which is helpful for the reflux discharge of the silt and can effectively improve the reflux efficiency of the silt.

[0011] In the above-mentioned rural industrial wastewater resource treatment system based on the MUCT process, a sludge stirring device capable of preventing the sludge at the bottom from sticking and agglomerating is also provided at the bottom of the sedimentation reaction tank.

[0012] The sludge stirring device at the bottom of the sedimentation reaction tank can prevent the sludge at the bottom from sticking and agglomerating, which would affect the normal operation of the sedimentation reaction tank and the reflux discharge of the sludge.

[0013] In the above-mentioned rural industrial wastewater resource treatment system based on the MUCT process, the sludge stirring device includes a sludge stirring shaft inserted through one side of the sedimentation reaction tank, the end of the sludge stirring shaft is sleeved on the inner wall of the other side of the sedimentation reaction tank through a rotating shaft seat, a plurality of stirring scrapers are provided on the sludge stirring shaft, a driven wheel is sleeved on the other end of the sludge stirring shaft, a mounting frame is provided on the outer wall of the sedimentation reaction tank, a sludge stirring driver is provided on the mounting frame, a driving wheel is sleeved on the output end of the sludge stirring driver, and the driving wheel and the driven wheel are connected by a transmission belt.

[0014] The stirring scraper on the sludge stirring shaft can loosen the sludge accumulated at the bottom of the sedimentation reaction tank to prevent the sludge from sticking and agglomerating, and make it easier for the water flow to push the sludge to the silt discharge tank, thereby improving the sludge discharge efficiency. In addition, the loosened sludge helps promote the growth and metabolism of bacteria in the sludge, and the loosened sludge can avoid blockage of the pipeline during the backflow process, which can effectively improve the efficiency of sludge return discharge.

[0015] In the above-mentioned rural domestic wastewater resource treatment system based on the MUCT process, an active sealing groove for the sludge stirring shaft to pass through is provided through the side wall of the sedimentation reaction tank, and a rotating sealing ring is provided between the sludge stirring shaft and the active sealing groove.

[0016] The rotating sealing ring between the sludge stirring shaft and the active sealing groove plays an active sealing role during the rotation of the sludge stirring shaft, preventing sewage from flowing out through the rotating sealing ring.

[0017] In the above-mentioned rural domestic wastewater resource treatment system based on the MUCT process, the bottom surface of the sedimentation reaction tank is horizontally arranged or inclined towards the sludge discharge tank, and the blowing direction of the air blowing head is parallel to the bottom surface of the sedimentation reaction tank.

[0018] The pushing direction of the water flow generated by the air blowing head is parallel to the bottom of the sedimentation reaction tank, which can push the sludge in parallel, reduce the resistance of the sludge flow, and can more quickly realize the transportation and transfer of the sludge, thereby improving work efficiency.

[0019] In the above-mentioned rural domestic wastewater resource treatment system based on the MUCT process, the aeration device includes a horizontal aeration pipe horizontally arranged in the aerobic tank. Both ends of the horizontal aeration pipe are respectively communicated with vertical aeration pipes. A number of aeration holes are evenly distributed on the pipe walls of the horizontal aeration pipe and the vertical aeration pipes. An air inlet pipe passing through the top of the aerobic tank is provided at the middle end of the horizontal aeration pipe, and the air inlet pipe is connected to an aeration blower arranged at the top of the aerobic tank.

[0020] When the aeration blower operates, air is transported through the air inlet pipe to the horizontal aeration pipe and the vertical aeration pipes. The air will diffuse and escape from the aeration holes in the form of bubbles into the wastewater. During the rising process of the bubbles, oxygen will be continuously released, providing sufficient dissolved oxygen for aerobic microorganisms.

[0021] In the above-mentioned rural domestic wastewater resource treatment system based on the MUCT process, mixing and stirring shafts are vertically arranged in the anaerobic tank, the first anoxic tank and the second anoxic tank respectively. A number of stirring fan blades are provided on the mixing and stirring shafts, and the ends of the mixing and stirring shafts are connected to the output ends of mixing and stirring drivers respectively arranged at the tops of the anaerobic tank, the first anoxic tank and the second anoxic tank.

[0022] The stirring fan blades on the mixing and stirring shafts can perform stirring operations to ensure that domestic wastewater can fully react in the anaerobic tank, the first anoxic tank and the second anoxic tank.

[0023] In the above-mentioned rural domestic wastewater resource treatment system based on the MUCT process, the first anoxic inlet pipe is located at the upper ends of the anaerobic tank and the first anoxic tank, the second anoxic inlet pipe is located at the lower ends of the first anoxic tank and the second anoxic tank, an aerobic inlet pipe is provided between the upper ends of the second anoxic tank and the aerobic tank, a sedimentation inlet pipe is provided between the upper ends of the aerobic tank and the sedimentation reaction tank, a filter screen is provided in the anaerobic inlet pipe of the anaerobic tank, and a sedimentation outlet pipe is provided at the other end of the sedimentation reaction tank.

[0024] The wastewater flows from top to bottom in the first anoxic tank and from bottom to top in the second anoxic tank, which can ensure that the wastewater reacts fully in the first anoxic tank and the second anoxic tank, achieving efficient and stable nitrogen and phosphorus removal effects. The filter screen in the anaerobic inlet pipe can isolate the coarse suspended solids and sand grains in the domestic wastewater, and the finally treated effluent is discharged through the sedimentation outlet pipe.

[0025] Compared with the existing technologies, the advantages of the present utility model are as follows: 1. The system has strong adaptability, adopts an efficient sludge reflux method, and can achieve efficient and stable nitrogen and phosphorus removal effects. 2. The sludge at the bottom of the sedimentation reaction tank will not adhere and cake, and the discharge and reflux efficiency of the sludge are high. Brief Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram provided by the present utility model;

[0027] Figure 2 is the structural schematic diagram of the sedimentation reaction tank;

[0028] Figure 3 is the structural schematic diagram of the anoxic reaction unit.

[0029] In the figure, anaerobic pond 1, anoxic reaction unit 2, aerobic pond 3, sedimentation reaction pond 4, first anoxic pond 5, second anoxic pond 6, first sludge return pipe 7, second sludge return pipe 8, anaerobic influent pipe 9, sludge discharge assembly 10, first return pump 11, second return pump 12, nitrification liquid return pipe 13, third return pump 14, second anoxic influent pipe 15, aeration device 16, first anoxic influent pipe 17, anaerobic return port 18, anaerobic return pipe 19, fourth return pump 20, sludge discharge pond 21, sludge discharge air blowing plate 22, air blowing cavity 23, air blowing holes 24, air blowing heads 25, sludge stirring device 26, sludge stirring shaft 27, rotating shaft seat 28, stirring scrapers 29, driven wheels 30, mounting frames 31, sludge stirring driver 32, driving wheels 33, drive belts 34, movable sealing grooves 35, rotating sealing rings 36, horizontal aeration pipes 37, vertical aeration pipes 38, air inlet pipes 39, aeration blowers 40, mixing and stirring shaft 41, stirring fan blades 42, mixing and stirring driver 43, aerobic influent pipe 44, sedimentation influent pipe 45, filter screens 46, second hubs 47, scrapers 48, second positioning sleeves 49, first hubs 50, stirring blades 51, first positioning sleeves 52, sedimentation effluent pipe 53. Detailed implementation mode

[0030] As Figures 1 - 3 shown, a rural production wastewater resource treatment system based on the MUCT process includes an anaerobic pond 1, an anoxic reaction unit 2, an aerobic pond 3, and a sedimentation reaction pond 4 connected in series in sequence. The anoxic reaction unit 2 includes a first anoxic pond 5 and a second anoxic pond 6 connected in series. The bottom of the sedimentation reaction pond 4 is respectively connected to the anaerobic influent pipe 9 of the anaerobic pond 1 and the first anoxic influent pipe 17 of the first anoxic pond 5 through the first sludge return pipe 7 and the second sludge return pipe 8. A sludge discharge assembly 10 is also provided in the sedimentation reaction pond 4. A first return pump 11 and a second return pump 12 are respectively provided on the first sludge return pipe 7 and the second sludge return pipe 8. The bottom of the aerobic pond 3 is connected to the second anoxic influent pipe 15 of the second anoxic pond 6 through the nitrification liquid return pipe 13 and the third return pump 14. An aeration device 16 is provided in the aerobic pond 3.

[0031] In this utility model, domestic wastewater enters the anaerobic tank 1 through the anaerobic inlet pipe 9. The domestic wastewater reacts with a large number of polyphosphate-accumulating bacteria in the activated sludge under anaerobic conditions to release phosphorus. The sludge-water mixture in the anaerobic tank 1 flows into the first anoxic tank 5 through the first anoxic inlet pipe 17. While receiving the sludge-water mixture from the anaerobic tank 1, the first anoxic tank 5 also receives the sludge reflux from the precipitation reaction tank 4. Part of the sludge in the precipitation reaction tank 4 flows back into the first anoxic tank 5 through the second sludge reflux pipe 8 and the second reflux pump 12. The denitrifying bacteria in the first anoxic tank 5 use the nitrate contained in the sludge refluxed from the precipitation reaction tank 4 for anoxic phosphorus uptake, and at the same time denitrify the nitrate into nitrogen. The second anoxic tank 6 receives the mixed liquid from the first anoxic tank 5 and the nitrification liquid reflux from the aerobic tank 3. The nitrification liquid of the aerobic tank 3 flows back into the second anoxic tank 6 through the nitrification liquid reflux pipe 13 and the third reflux pump 14. In this way, there are a large amount of nitrate and orthophosphate in the second anoxic tank 6. The polyphosphate-accumulating bacteria in the second anoxic tank 6 use the existing nitrate as an electron acceptor to super-absorb the orthophosphate in the water, and the nitrate is denitrified and reduced to nitrogen, thereby removing nitrogen and phosphorus from the sewage, and improving the nitrogen and phosphorus removal efficiency of the entire process. The mixed liquid flowing out of the second anoxic tank 6 enters the aerobic tank 3. The aerobic microorganisms in the aerobic tank 3 react with the wastewater to nitrify the ammonia nitrogen in the wastewater into nitrate and oxidize the residual organic matter in the wastewater. The sludge-water mixture in the aerobic tank 3 enters the precipitation reaction tank 4, and solid-liquid separation is achieved in the precipitation reaction tank 4. The supernatant is discharged as the finally treated effluent, and part of the excess sludge flows back into the anaerobic tank 1 and the first anoxic tank 5.

[0032] This treatment system has strong adaptability, adopts an efficient sludge reflux method, can achieve efficient and stable nitrogen and phosphorus removal effects. The sludge discharge component 10 in the precipitation reaction tank 4 helps the reflux and discharge of sludge, can effectively improve the reflux efficiency of sludge, and avoid sludge accumulation. The aeration device 16 in the aerobic tank 3 can oxygenate the wastewater and provide sufficient dissolved oxygen for aerobic microorganisms to meet their metabolic needs.

[0033] Specifically, as shown in Figure 1 and Figure 3 , an anaerobic reflux port 18 is provided at the bottom of the first anoxic tank 5. The anaerobic reflux port 18 is connected to the anaerobic inlet pipe 9 of the anaerobic tank 1 through an anaerobic reflux pipe 19 and a fourth reflux pump 20.

[0034] The sludge-water mixture in the first anoxic tank 5 can flow back into the anaerobic tank 1 through the anaerobic reflux pipe 19 and the fourth reflux pump 20. Part of the sludge in the precipitation reaction tank 4 flows back into the anaerobic tank 1 through the first sludge reflux pipe 7 and the first reflux pump 11 to ensure the concentration of activated sludge in the anaerobic tank 1.

[0035] Specifically, as shown in Figure 1 andFigure 2 As shown, a silt removal tank 21 is provided on one side of the bottom end of the sedimentation reaction tank 4, and the silt removal tank 21 is respectively connected to the above-mentioned first sludge return pipe 7 and the second sludge return pipe 8, and the silt removal assembly 10 includes a silt removal air blowing plate 22 arranged on the inner side wall of the sedimentation reaction tank 4 away from the silt removal tank 21, and the silt removal air blowing plate 22 is hollow and forms an air blowing air cavity 23, and a plurality of air blowing holes 24 connected to the air blowing air cavity 23 are evenly distributed on the side wall of the silt removal air blowing plate 22 near the silt removal tank 21, and an air blowing head 25 is provided on the air hole 24, and the air inlet end of the air blowing air cavity 23 is connected to an external air blower.

[0036] The external air blowing blower is operated to deliver air to the air blowing chamber 23 of the silt discharge blowing plate 22. The air enters the air blowing head 25 through the air blowing hole 24 and is ejected from the air blowing head 25 to form a driving water flow to push the silt settled at the bottom of the sedimentation reaction tank 4, which can quickly push the silt into the silt discharge tank 21, which is helpful for the reflux discharge of the silt and can effectively improve the reflux efficiency of the silt.

[0037] Specifically, combined with Figure 1 and Figure 2 As shown, a sludge stirring device 26 capable of preventing the sludge at the bottom from sticking and agglomerating is further provided at the bottom of the sedimentation reaction tank 4. The sludge stirring device 26 comprises a sludge stirring shaft 27 penetrating one side of the sedimentation reaction tank 4. The end of the sludge stirring shaft 27 is sleeved on the inner wall of the other side of the sedimentation reaction tank 4 through a rotating shaft seat 28. A plurality of stirring scrapers 29 are provided on the sludge stirring shaft 27. A driven wheel 30 is sleeved on the other end of the sludge stirring shaft 27. A mounting frame 31 is provided on the outer wall of the sedimentation reaction tank 4. A sludge stirring driver 32 is provided on the mounting frame 31. A driving wheel 33 is sleeved on the output end of the sludge stirring driver 32. The driving wheel 33 and the driven wheel 30 are connected by a transmission belt 34.

[0038] The stirring scraper 29 includes a second hub 47 sleeved on the sludge stirring shaft 27, a scraper 48 is provided on the outer side of the second hub 47, and second positioning sleeves 49 are respectively provided at both ends of the second hub 47. The second positioning sleeves 49 are detachably connected to the sludge stirring shaft 27 through bolt connectors.

[0039] The sludge stirring driver 32 on the mounting frame 31 is running, and the output end of the sludge stirring driver 32 rotates to drive the driving wheel 33 to rotate, and the driving wheel 33 rotates synchronously to drive the driven wheel 30 to rotate to drive the sludge stirring shaft 27 to rotate. The stirring scraper 29 on the sludge stirring shaft 27 can loosen the sludge accumulated at the bottom of the sedimentation reaction tank 4 to prevent the sludge from sticking and agglomerating, and make it easier for the pushing water flow to push the sludge to the silt discharge tank 21, thereby improving the sludge discharge efficiency. In addition, the loosened sludge helps to promote the growth and metabolism of bacteria in the sludge, and the loosened sludge can avoid the blockage of the pipeline during the reflux process, which can effectively improve the efficiency of the sludge reflux discharge.

[0040] Specifically, as shown in combination with Figure 1 and Figure 2 a movable seal groove 35 through which the sludge stirring shaft 27 penetrates is provided on the side wall of the sedimentation reaction tank 4, and a rotating seal ring 36 is provided between the sludge stirring shaft 27 and the movable seal groove 35.

[0041] The rotating seal ring 36 between the sludge stirring shaft 27 and the movable seal groove 35 plays a role of movable seal during the rotation of the sludge stirring shaft 27, preventing sewage from flowing out through the rotating seal ring 36.

[0042] Preferably, as shown in combination with Figure 1 and Figure 2 the bottom surface of the sedimentation reaction tank 4 is horizontally arranged or inclined towards the sludge discharge tank 21, and the blowing direction of the air blowing head 25 is parallel to the bottom surface of the sedimentation reaction tank 4.

[0043] The pushing direction of the water flow generated by the air blowing head 25 is parallel to the bottom of the sedimentation reaction tank 4, which can push the sludge in parallel, reduce the resistance of the sludge flow, and can more quickly realize the transportation and transfer of the sludge, thereby improving the work efficiency.

[0044] Specifically, as shown in combination with Figure 1 the aeration device 16 includes a horizontal aeration pipe 37 horizontally arranged in the aerobic tank 3. The two ends of the horizontal aeration pipe 37 are respectively communicated with a vertical aeration pipe 38. A plurality of aeration holes are uniformly distributed on the pipe walls of the horizontal aeration pipe 37 and the vertical aeration pipe 38. An air inlet pipe 39 penetrating through the top of the aerobic tank 3 is provided in the middle of the horizontal aeration pipe 37, and the air inlet pipe 39 is connected to an aeration blower 40 arranged on the top of the aerobic tank 3.

[0045] When the aeration blower 40 operates, air is conveyed through the air inlet pipe 39 into the horizontal aeration pipe 37 and the vertical aeration pipe 38. The air will diffuse out in the form of bubbles from the aeration holes and enter the wastewater. During the rising process of the bubbles, oxygen will be continuously released, providing sufficient dissolved oxygen for aerobic microorganisms.

[0046] Specifically, as shown in combination with Figure 1 and Figure 3 mixed stirring shafts 41 are respectively vertically penetrated in the anaerobic tank 1, the first anoxic tank 5 and the second anoxic tank 6. A plurality of stirring fan blades 42 are provided on the mixed stirring shafts 41, and the ends of the mixed stirring shafts 41 are connected to the output ends of mixed stirring drivers 43 respectively arranged on the tops of the anaerobic tank 1, the first anoxic tank 5 and the second anoxic tank 6.

[0047] The stirring fan blade 42 includes a first hub 50 sleeved on the mixing and stirring shaft 41. Stirring blades 51 are provided on the outer side of the first hub 50. First positioning sleeves 52 are respectively provided at both ends of the first hub 50, and the first positioning sleeves 52 and the mixing and stirring shaft 41 are detachably connected by bolt connectors.

[0048] The mixing and stirring driver 43 operates, and the output end of the mixing and stirring driver 43 rotationally drives the mixing and stirring shaft 41 to rotate synchronously. The stirring fan blade 42 on the mixing and stirring shaft 41 performs a stirring operation to ensure that domestic wastewater can fully react in the anaerobic tank 1, the first anoxic tank 5, and the second anoxic tank 6.

[0049] Specifically, as shown in Figures 1 - 3 , the first anoxic inlet pipe 17 is located at the upper ends of the anaerobic tank 1 and the first anoxic tank 5. The second anoxic inlet pipe 15 is located at the lower ends of the first anoxic tank 5 and the second anoxic tank 6. An aerobic inlet pipe 44 is provided between the upper ends of the second anoxic tank 6 and the aerobic tank 3. A sedimentation inlet pipe 45 is provided between the upper ends of the aerobic tank 3 and the sedimentation reaction tank 4. A filter screen 46 is provided in the anaerobic inlet pipe 9 of the anaerobic tank 1. A sedimentation outlet pipe 53 is provided at the other end of the sedimentation reaction tank 4.

[0050] The wastewater flows from top to bottom in the first anoxic tank 5 and from bottom to top in the second anoxic tank 6, which can ensure that the wastewater fully reacts in the first anoxic tank 5 and the second anoxic tank 6, achieving an efficient and stable nitrogen and phosphorus removal effect. The filter screen 46 in the anaerobic inlet pipe 9 can isolate the coarse suspended solids and sand grains in the domestic wastewater, and the finally treated effluent is discharged through the sedimentation outlet pipe 53.

[0051] The working principle of the present utility model is as follows: Domestic wastewater enters the anaerobic tank 1 through the anaerobic inlet pipe 9. While receiving the mud-water mixture from the anaerobic tank 1, the first anoxic tank 5 also receives the sludge reflux from the sedimentation reaction tank 4. While receiving the mixed liquid from the first anoxic tank 5, the second anoxic tank 6 receives the nitrified liquid reflux from the aerobic tank 3. The mixed liquid flowing out of the second anoxic tank 6 enters the aerobic tank 3. The mud-water mixed liquid in the aerobic tank 3 enters the sedimentation reaction tank 4, where mud-water separation is achieved. The supernatant is discharged as the finally treated effluent, and the remaining sludge is refluxed into the anaerobic tank 1 and the first anoxic tank 5;

[0052] The air blowing head 25 sprays out airflows to form a driving water flow to push the sludge deposited at the bottom of the sedimentation reaction tank 4, and can quickly push the sludge into the sludge drainage tank 21; the sludge stirring shaft 27 rotates, and the stirring scraper 29 on the sludge stirring shaft 27 can loosen the sludge deposited at the bottom of the sedimentation reaction tank 4, prevent the sludge from sticking and caking, and make it easier for the driving water flow to push the sludge into the sludge drainage tank 21.

[0053] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0054] Although terms such as anaerobic pond 1, anoxic reaction unit 2, aerobic pond 3, sedimentation reaction pond 4, first anoxic pond 5, second anoxic pond 6, first sludge return pipe 7, second sludge return pipe 8, anaerobic water inlet pipe 9, sludge discharge assembly 10, first return pump 11, second return pump 12, nitrification liquid return pipe 13, third return pump 14, second anoxic water inlet pipe 15, aeration device 16, first anoxic water inlet pipe 17, anaerobic return port 18, anaerobic return pipe 19, fourth return pump 20, sludge discharge pond 21, sludge discharge air blowing plate 22, air blowing cavity 23, air blowing holes 24, air blowing heads 25, sludge stirring device 26, sludge stirring shaft 27, rotating shaft seat 28, stirring scrapers 29, driven wheels 30, mounting frames 31, sludge stirring driver 32, driving wheels 33, transmission belts 34, movable sealing grooves 35, rotating sealing rings 36, horizontal aeration pipes 37, vertical aeration pipes 38, air inlet pipes 39, aeration blowers 40, mixing and stirring shaft 41, stirring fan blades 42, mixing and stirring driver 43, aerobic water inlet pipe 44, sedimentation water inlet pipe 45, filter screens 46, second hubs 47, scrapers 48, second positioning sleeves 49, first hubs 50, stirring blades 51, first positioning sleeves 52, sedimentation water outlet pipes 53, etc. are used more frequently herein, the use of these terms is only for more convenient description and explanation of the essence of the present utility model; any interpretation of them as an additional limitation is contrary to the spirit of the present utility model.

Claims

1. A rural industrial wastewater resource treatment system based on the MUCT process, comprising an anaerobic tank (1), an anoxic reaction unit (2), an aerobic tank (3) and a sedimentation reaction tank (4) connected in series, characterized in that: The anoxic reaction unit (2) comprises a first anoxic tank (5) and a second anoxic tank (6) connected in series. The bottom end of the precipitation reaction tank (4) is connected to the anaerobic water inlet pipe (9) of the anaerobic tank (1) and the first anoxic water inlet pipe (17) of the first anoxic tank (5) through a first sludge return pipe (7) and a second sludge return pipe (8), respectively. The precipitation reaction tank (4) is also provided with a sludge discharge assembly (10). The first sludge return pipe (7) and the second sludge return pipe (8) are provided with a first reflux pump (11) and a second reflux pump (12), respectively. The bottom end of the aerobic tank (3) is connected to the second anoxic water inlet pipe (15) of the second anoxic tank (6) through a nitrification liquid return pipe (13) and a third reflux pump (14), and the aerobic tank (3) is provided with an aeration device (16).

2. The rural industrial wastewater resource treatment system based on MUCT process according to claim 1 is characterized in that: The bottom end of the first anoxic tank (5) is provided with an anaerobic reflow port (18), and the anaerobic reflow port (18) is connected to the anaerobic water inlet pipe (9) of the anaerobic tank (1) through an anaerobic reflow pipe (19) and a fourth reflow pump (20).

3. The rural industrial wastewater resource treatment system based on MUCT process according to claim 1 is characterized in that: A sludge removal tank (21) is provided at one side of the bottom end of the sedimentation reaction tank (4), and the sludge removal tank (21) is respectively connected to the first sludge return pipe (7) and the second sludge return pipe (8). The sludge removal assembly (10) comprises a sludge removal air blowing plate (22) arranged on the inner side wall of the sedimentation reaction tank (4) away from the sludge removal tank (21), and the sludge removal air blowing plate (22) is hollow and has an air blowing air cavity (23). A plurality of air blowing holes (24) connected to the air blowing air cavity (23) are evenly distributed on the side wall of the sludge removal air blowing plate (22) near the sludge removal tank (21), and the air blowing holes (24) are provided with an air blowing head (25). The air inlet end of the air blowing air cavity (23) is connected to an external air blower.

4. The rural industrial wastewater resource treatment system based on MUCT process according to claim 3 is characterized in that: The bottom of the sedimentation reaction tank (4) is also provided with a sludge stirring device (26) capable of preventing the sludge at the bottom from sticking and agglomerating.

5. The rural industrial wastewater resource treatment system based on MUCT process according to claim 4 is characterized in that: The sludge stirring device (26) comprises a sludge stirring shaft (27) which is inserted through one side of the sedimentation reaction tank (4); the end of the sludge stirring shaft (27) is sleeved on the inner wall of the other side of the sedimentation reaction tank (4) through a rotating shaft seat (28); a plurality of stirring scrapers (29) are arranged on the sludge stirring shaft (27); a driven wheel (30) is sleeved on the other end of the sludge stirring shaft (27); a mounting frame (31) is arranged on the outer wall of the sedimentation reaction tank (4); a sludge stirring driver (32) is arranged on the mounting frame (31); a driving wheel (33) is sleeved on the output end of the sludge stirring driver (32); the driving wheel (33) and the driven wheel (30) are connected to each other through a transmission belt (34).

6. The rural industrial wastewater resource treatment system based on MUCT process according to claim 5 is characterized in that: A movable sealing groove (35) for the sludge stirring shaft (27) to pass through is provided on the side wall of the sedimentation reaction tank (4), and a rotating sealing ring (36) is provided between the sludge stirring shaft (27) and the movable sealing groove (35).

7. The rural industrial wastewater resource treatment system based on MUCT process according to claim 3 is characterized in that: The bottom surface of the precipitation reaction tank (4) is arranged horizontally or inclined toward the desilting tank (21), and the blowing direction of the blowing head (25) is parallel to the bottom surface of the precipitation reaction tank (4).

8. The rural industrial wastewater resource treatment system based on MUCT process according to any one of claims 1 to 7, characterized in that: The aeration device (16) comprises a horizontal aeration pipe (37) horizontally arranged in the aerobic tank (3), the two ends of the horizontal aeration pipe (37) are respectively connected to the vertical aeration pipe (38), a plurality of aeration holes are evenly distributed on the pipe walls of the horizontal aeration pipe (37) and the vertical aeration pipe (38), the middle end of the horizontal aeration pipe (37) is provided with an air inlet pipe (39) penetrating the top of the aerobic tank (3), and the air inlet pipe (39) is connected to an aeration blower (40) arranged at the top of the aerobic tank (3).

9. The rural industrial wastewater resource treatment system based on MUCT process according to any one of claims 1 to 7, characterized in that: A mixing and stirring shaft (41) is vertically inserted into the anaerobic tank (1), the first anoxic tank (5) and the second anoxic tank (6), respectively. A plurality of stirring blades (42) are arranged on the mixing and stirring shaft (41), and the end of the mixing and stirring shaft (41) is connected to the output end of a mixing and stirring driver (43) respectively arranged at the top of the anaerobic tank (1), the first anoxic tank (5) and the second anoxic tank (6).

10. The rural industrial wastewater resource treatment system based on MUCT process according to any one of claims 1 to 7, characterized in that: The first anoxic water inlet pipe (17) is located at the upper ends of the anaerobic tank (1) and the first anoxic tank (5), the second anoxic water inlet pipe (15) is located at the lower ends of the first anoxic tank (5) and the second anoxic tank (6), an aerobic water inlet pipe (44) is provided between the upper ends of the second anoxic tank (6) and the aerobic tank (3), a sedimentation water inlet pipe (45) is provided between the aerobic tank (3) and the upper ends of the sedimentation reaction tank (4), a filter screen (46) is provided in the anaerobic water inlet pipe (9) of the anaerobic tank (1), and a sedimentation water outlet pipe (53) is provided at the other end of the sedimentation reaction tank (4).

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