A low energy consumption sewage treatment system

Abstract

The invention discloses a low-energy sewage treatment system, which relates to the technical field of sewage treatment, including a septic tank, a grid bin, and a sedimentation bin arranged in series, wherein a slow-release aeration bin and a multi-stage anoxic bin are arranged between the grid bin and the sedimentation bin; the water inlet and the water outlet of the anoxic bin are arranged at the bottom, the water inlet of the first-stage anoxic bin is connected to the grid bin, the water outlet of each anoxic bin is connected to the slow-release aeration bin, the upper-stage anoxic bin is connected to the lower-stage anoxic bin, the top of the anoxic bin is provided with an air inlet and an air outlet, the air outlet is connected to the slow-release aeration bin, and a piston assembly is arranged inside the anoxic bin; a frame is arranged inside the slow-release aeration bin, a filler assembly, a gas slow-release assembly and a cleaning assembly are arranged on the frame, and the filler assembly and the gas slow-release assembly are arranged alternately in a stepped manner. The invention solves the problem of excessive energy consumption caused by long aeration time and large aeration volume in the prior art, and the problem of poor oxygen absorption effect of water body caused by too fast release of gas generated by aeration.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a low-energy consumption sewage treatment system. Background Art

[0002] At present, the main methods of sewage treatment are pretreatment, secondary treatment and tertiary treatment. Septic tanks and biogas tanks are often used in pretreatment, biological contact oxidation, activated sludge, oxidation ditches are often used in secondary treatment, and artificial wetlands, ecological filters and land infiltration are often used in tertiary treatment. For example, the biological contact oxidation process uses the dense microbial community formed by the biofilm attached to the filler to decompose the soluble organic matter in the sewage under aeration and oxygenation conditions, thereby achieving the purpose of water purification.

[0003] At present, urban sewage is mainly discharged into sewage treatment plants through sewage pipe networks for centralized treatment. However, sewage generated in rural areas, temporary construction camps, etc. cannot be directly connected to the urban sewage pipe network. Most of the sewage is first discharged to septic tanks and then treated by small and medium-sized integrated sewage treatment equipment. This type of sewage is mostly generated in a fixed time period every day, and the total amount of sewage is small and the water quality does not fluctuate much. Among the existing small and medium-sized sewage treatment equipment, whether it is equipment based on the oxide film process or the activated sludge process, most of them require a large amount of continuous aeration to prevent precipitation and maintain the oxygen content in the sewage, thereby improving the efficiency of microbial decomposition of organic matter. However, this process lasts for a long time and consumes a lot of energy, and is not suitable for use when the total amount of sewage is small.

[0004] In the actual sewage treatment process, it is found that the gas generated by aeration equipment such as air pumps will be released into the atmosphere after a short residence time in the water body, so a large amount of continuous aeration is required to keep the oxygen in the water body at a high level. In addition, after the sewage treatment equipment based on the oxidation film process has been used for a long time, due to the structural limitations of the aerobic tank, the attached dirt and aging biofilm cannot be cleaned in time, resulting in a poor subsequent sewage treatment effect. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a low-energy sewage treatment system, which solves the problem in the prior art of excessive energy consumption caused by long aeration time and large aeration volume, and the problem of poor oxygen absorption effect of water body caused by too fast release of gas generated by aeration.

[0006] The technical solution of the present invention is achieved as follows: a low-energy sewage treatment system comprises a septic tank, a grid bin and a sedimentation bin arranged in series, an anoxic bin and a slow-release aeration bin are arranged in series from high to low between the grid bin and the sedimentation bin; the anoxic bin is arranged in at least two levels from high to low, the water inlet and the water outlet of the anoxic bin are arranged at the bottom, the water inlet of the first-level anoxic bin is connected to the water outlet of the grid bin, the water outlet of each anoxic bin is connected to the slow-release aeration bin, the water outlet of the upper-level anoxic bin is connected to the water inlet of the lower-level anoxic bin, the top of the anoxic bin is provided with an air inlet and an air outlet, the air outlet is connected to the slow-release aeration bin, and a piston assembly is arranged inside the anoxic bin; a frame is provided inside the slow-release aeration bin, a filler assembly and a gas slow-release assembly are provided on the frame, the filler assembly and the gas slow-release assembly are arranged alternately in a stepped manner, and a cleaning assembly matching the gas slow-release assembly is provided on the frame.

[0007] Preferably, the anoxic chamber comprises a cylindrical body, and two water outlets and one water inlet are provided at the bottom of the cylindrical body, and the two water outlets are respectively connected with the water inlet of the next-level anoxic chamber and the slow-release aeration chamber through water pipelines; an air inlet and an air outlet are provided at the top of the cylindrical body, the air inlet is connected with an air inlet pipe, and the air outlet is connected with the slow-release aeration chamber through an air pipeline, valves are provided on the air inlet pipe, the air pipeline and the water pipeline, a throttle valve is provided on the air pipeline, and the valve and the throttle valve are both connected to the controller.

[0008] Preferably, the piston assembly includes a cylindrical plug body coaxially and vertically arranged inside a cylindrical barrel, the side wall of the cylindrical plug body is provided with at least two grooves, each groove is provided with a rubber sealing ring, and limit sensors are provided at the top and bottom of the cylindrical barrel, and the limit sensors are connected to the controller.

[0009] Preferably, the slow-release aeration bin comprises a rectangular bin body, the top of the rectangular bin body is open, the bottom of the rectangular bin body is provided with an air inlet and the air inlet is connected to the gas pipeline, at least two aeration pipes connected to the air inlet are parallelly provided at the bottom of the rectangular bin body, and a plurality of air holes are provided on the aeration pipes; a slide groove is vertically provided in the rectangular bin body, and the frame is slidably connected to the rectangular bin body through the slide groove. The frame is a rectangular frame, and a pulley matching the slide groove is rotatably provided on the rectangular frame.

[0010] Preferably, the filler assembly comprises a plurality of groups of support rods rotatably mounted on a frame, a plurality of filler blocks are equidistantly penetrated through the support rods, and each group of support rods are parallel to each other and arranged in a stepped manner.

[0011] Preferably, the gas slow-release assembly includes a plurality of first slow-release plates and a plurality of second slow-release plates, the first slow-release plates being arranged between adjacent support rods, one end of the first slow-release plates being aligned with the lower support rod, and the other end being aligned with the higher support rod; the second slow-release plates are all fixed in parallel on the frame, and are all arranged in parallel between two adjacent groups of support rods, one end of the second slow-release plate is provided with an air gap, and the air gap is arranged on the lower side of the support rods arranged in a stepped manner.

[0012] Preferably, the first slow-release plate and the second slow-release plate are both provided with slow-release air holes, and both are provided with air storage baffle rings at the bottom; the first slow-release plate is tilted, and one end thereof close to the higher support rod is higher than the other end.

[0013] Preferably, the number of the cleaning components is consistent with the number of groups of support rods and are respectively arranged between adjacent second slow-release plates. The cleaning components include a sliding rod slidably arranged on the frame along the length direction of the support rod, one end of the sliding rod is connected to a handle, and the other end is connected to a scraper. The scraper is provided with openings to meet the passage of the support rod, the filler block, and the first slow-release plate. The openings are provided with brushes that match the upper surface of the first slow-release plate, and the bottom of the scraper is provided with a brush that matches the upper surface of the second slow-release plate. A spare blower is connected to the bottom of the slow-release aeration bin.

[0014] Beneficial effects of the present invention: The multiple chambers provided in this scheme are arranged from high to bottom in sequence, and the sewage automatically enters the anoxic chamber by the gravity. After the sewage enters, it simultaneously pushes the piston assembly to float up, discharges the gas in the anoxic chamber, and the discharged gas is passed into the slow-release aeration chamber to achieve the purpose of aeration. When the sewage enters the anoxic chamber, the sewage is separated from the gas under the isolation effect of the piston assembly, thereby producing an anoxic environment to meet the requirements of the anoxic treatment process; the anoxic chamber is set in multiple levels, and the controller controls the opening and closing of the valves between the corresponding anoxic chambers to allow the sewage to gradually enter different anoxic chambers, thereby achieving continuous and unpowered gas supply to the slow-release aeration chamber, and this process only consumes the energy of opening and closing the valves, which can achieve the purpose of energy saving. At the same time, as the sewage flows out of the anoxic chamber, the piston assembly automatically resets, the air inlet opens synchronously, and the anoxic chamber is refilled with gas for the next use. The whole process is achieved only by the gravity of the sewage, and the energy-saving effect is obvious.

[0015] The filler components arranged alternately in a stepped manner behind the slow-release aeration chamber work together with the gas slow-release components to fully utilize and slowly release the gas; in addition, a cleaning component is set in the chamber to facilitate the cleaning of aging biofilms, soil, etc. deposited on the gas slow-release components during long-term use, thereby restoring the gas slow-release function and improving the sewage treatment efficiency during long-term use. This technology solves the problem of excessive energy consumption caused by long aeration time and large aeration volume in existing small-scale sewage treatment systems, as well as the problem of poor oxygen absorption by water bodies caused by too fast release of gas generated by aeration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the system principle of the present invention;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the anoxic chamber of the present invention;

[0019] Figure 3 This is a schematic diagram of the external structure of the slow-release aeration bin of the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of a rectangular warehouse body of the present invention;

[0021] Figure 5 This is a schematic diagram of the matching relationship between the interior of the rectangular warehouse and the frame of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the frame, gas slow-release component and filler component of the present invention;

[0023] Figure 7 It is an enlarged schematic diagram of the structure of the frame, gas slow-release component and filler component of the present invention;

[0024] Figure 8 It is a schematic diagram of the structural position relationship between the frame, the gas slow-release component and the filler component of the present invention;

[0025] Fig. 9 It is a schematic diagram of the structural position relationship between the frame, the gas slow-release component and the filler component of the present invention;

[0026] Fig.10 This is a schematic structural diagram of the first sustained-release plate of the present invention;

[0027] Fig.11 This is a schematic structural diagram of the second sustained-release plate of the present invention;

[0028] Fig.12 This is a schematic diagram of the support rod and filler block structure of the present invention;

[0029] Fig.13 It is a schematic diagram of the structure of the cleaning component of the present invention. DETAILED DESCRIPTION

[0030] The following is a relatively complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 , 3 As shown, in Example 1, a low-energy sewage treatment system comprises a septic tank 1, a grid bin 2, and a sedimentation bin 3 arranged in series, wherein an anoxic bin 4 and a slow-release aeration bin 5 are arranged in series from high to low between the grid bin 2 and the sedimentation bin 3. The anoxic bin 4 is arranged in at least two levels from high to low to meet the continuous gas supply demand, and preferably in three levels in this embodiment. The first-level anoxic bin is lower than the grid bin, so that the sewage can automatically enter the first-level anoxic bin by gravity. The water inlet and outlet of the anoxic bin 4 are both arranged at the bottom. The water inlet of the first-stage anoxic bin 4 is connected to the water outlet of the grid bin 2. The water outlet of each anoxic bin 4 is connected to the slow-release aeration bin 5. The water outlet of the upper-stage anoxic bin 4 is connected to the water inlet of the lower-stage anoxic bin 4. The top of the anoxic bin 4 is provided with an air inlet and an air outlet. The air outlet is connected to the slow-release aeration bin 5. The anoxic bin 4 is provided with a piston assembly inside. The slow-release aeration bin 5 is provided with a frame 6. The frame 6 is provided with a packing assembly and a gas slow-release assembly. The packing assembly and the gas slow-release assembly are arranged alternately in a stepped manner. The frame 6 is provided with a cleaning assembly that cooperates with the gas slow-release assembly. Figure 1 As shown, valves 7 are provided at the connection points and inlets between adjacent chambers such as between the septic tank and the grid bin, between the grid bin and the first-stage anoxic bin, between adjacent anoxic bins, the air inlet of the anoxic bin, between the water outlet of the anoxic bin and the slow-release aeration bin, between the air outlet of the anoxic bin and the slow-release aeration bin, and between the slow-release aeration bin and the sedimentation bin. The valves 7 are all connected to the controller, and the controller is preferably a PLC controller. In this embodiment, a spare blower 22 is connected to the bottom of the slow-release aeration bin 5 so that the spare blower can be used for supplementary aeration under special circumstances. The valve 7 is an electromagnetic on-off valve, and the controller can electrically control the opening and closing of the valve. When sewage or generated gas needs to enter the next chamber, the controller controls the valve to open.

[0032] When this embodiment is used, as the sewage enters the first-stage anoxic bin, the sewage synchronously pushes the piston assembly to float up, discharges the gas in the anoxic bin, and the discharged gas is passed into the slow-release aeration bin to achieve the purpose of aeration. When the sewage enters the first-stage anoxic bin, the sewage is separated from the gas under the isolation effect of the piston assembly, thereby generating an anoxic environment to meet the requirements of the anoxic treatment process. When the first-stage anoxic bin is full, the air inlet valve of the first-stage anoxic bin is opened, the air outlet valve is closed, and the valve at the water outlet is opened at the same time, and the sewage enters the second-stage anoxic bin through the water delivery channel, and the gas is discharged into the slow-release aeration bin at the same time. Repeat the above process, the sewage enters the subsequent anoxic bin step by step, thereby realizing the continuous gas supply to the slow-release aeration bin. The entire gas production process only consumes the energy of opening and closing the valve, which can achieve the purpose of energy saving. At the same time, as the sewage flows out of the anoxic bin, the piston assembly automatically resets, the air inlet is synchronously opened, and the anoxic bin is refilled with gas for the next use. The whole process is achieved only by the gravity of the sewage, and the energy-saving effect is obvious.

[0033] The filler components arranged alternately in a stepped manner in the slow-release aeration bin work together with the gas slow-release components to fully utilize and slowly release the gas. In addition, a cleaning component is arranged in the bin to facilitate the cleaning of aged biofilms, soil, etc. deposited on the gas slow-release components during long-term use, thereby restoring the gas slow-release function and improving the sewage treatment efficiency during long-term use.

[0034] When the sewage flows through the last anoxic tank, the sewage in the slow-release aeration tank is discharged into the sedimentation tank for sedimentation. This process can be achieved by pumping water, or the sedimentation tank can be set lower than the slow-release aeration tank and rely on gravity to achieve it. After the sewage in the slow-release aeration tank is discharged, the sewage in the last anoxic tank flows into the slow-release aeration tank for subsequent sewage treatment. This system is suitable for sewage treatment scenarios with a small total amount of sewage and strong concentration.

[0035] like Figure 2As shown, in Example 2, on the basis of Example 1, the anoxic bin 4 includes a cylindrical body, and the bottom of the cylindrical body is provided with two water outlets and one water inlet, and the two water outlets are respectively connected to the water inlet of the next-level anoxic bin 4 and the slow-release aeration bin 5 through the water pipeline 30, and the next-level anoxic bin and the slow-release aeration bin are connected at the same time. This system can select whether the sewage in the previous-level anoxic bin is directly discharged into the slow-release aeration bin or into the next-level anoxic bin according to the actual aeration volume requirement and the actual total amount of sewage. The water inlet of the first-level anoxic bin is connected to the grid bin, and one of the water outlets of the last-level anoxic bin is closed. An air inlet and an air outlet are provided at the top of the cylindrical body, and the air inlet is connected to an air inlet pipe 8, and the air outlet is connected to the slow-release aeration bin 5 through an air pipeline 9. A valve 7 is provided on the air inlet pipe 8, the air pipeline 9 and the water pipeline 30, and a throttle valve 23 is provided on the air pipeline 9, and the throttle valve 23 is connected to the controller. Setting a throttle valve can control the flow of the gas pipeline, thereby controlling the aeration speed, and can also control the speed at which sewage enters the anoxic chamber under the action of gravity.

[0036] The piston assembly includes a cylindrical plug body 10 coaxially and vertically arranged inside the cylindrical barrel. The side wall of the cylindrical plug body 10 is provided with at least two grooves. In this embodiment, two grooves are preferably provided. A rubber sealing ring 11 is provided in each groove. The provision of the sealing ring can enhance the air tightness between the cylindrical plug body and the cylindrical barrel. Limit sensors 12 are provided at the top and bottom of the cylindrical barrel, and the limit sensors 12 are connected to the controller. The limit sensors can be triggered when the cylindrical plug body floats to the top or falls to the bottom, and monitor and feedback the amount of sewage inside the cylindrical bin.

[0037] In this embodiment, when the sewage enters the first-stage anoxic bin from the grid bin, under the control of the controller, the valve of the air inlet pipe 8 of the first-stage anoxic bin is closed, the valve on the gas pipeline 9 of the first-stage anoxic bin is opened, and the valves on the water pipeline 30 connected to the first-stage anoxic bin are all closed. As the sewage enters under the cylindrical plug body under the action of gravity, the cylindrical plug body floats up, and at the same time, the gas in the anoxic bin above the cylindrical plug body is discharged to the slow-release aeration bin through the gas pipeline. When the cylindrical plug floats up to the limit sensor at the top of the trigger, the valve of the gas pipeline is closed, the valve of the air inlet pipe 8 is opened, the valve on the water pipeline between the next-level anoxic bin is opened, the valve on the air inlet pipe of the second-level anoxic bin is closed, the valve on the air pipeline between the second-level anoxic bin and the slow-release aeration bin is opened, the valve of the air inlet pipe 8 of the second-level anoxic bin is closed, the valve on the water pipeline connected to the second-level anoxic bin is closed, and the sewage in the first-level anoxic bin enters the second-level anoxic bin under the action of gravity, pushing the cylindrical plug in the second-level anoxic bin to move up and generate gas. As the sewage enters the second-level anoxic bin from the first-level anoxic bin, the cylindrical plug in the first-level anoxic bin falls, and fresh gas enters the first-level anoxic bin through the air inlet pipe in the first-level anoxic bin. When the cylindrical plug falls to the limit sensor at the bottom of the trigger, the signal is fed back to the controller, and the controller controls the valve on the air inlet pipe of the first-level anoxic bin to close. The above process is repeated until the sewage reaches and fills the last stage of anoxic chamber, then the valve on the delivery pipeline of the last stage of anoxic chamber is opened, and the sewage enters the slow-release aeration chamber for aeration treatment.

[0038] like Figure 3 , 4 As shown in Figures 5 and 6, Example 3, based on Example 2, the slow-release aeration bin 5 includes a rectangular bin body 13, the top of the rectangular bin body 13 is open, an air inlet is provided at the bottom of the rectangular bin body 13, and the air inlet is respectively connected to a plurality of gas pipelines 9, and at least two aeration pipes 31 connected to the air inlet are provided in parallel at the bottom of the rectangular bin body 13, and a plurality of air holes are provided on the aeration pipes 31. A slide 14 is vertically provided in the rectangular bin body 13, and the frame 6 is slidably connected to the rectangular bin body 13 through the slide 14. Among them, the frame 6 is a rectangular frame, and a pulley 15 that cooperates with the slide 14 is rotatably provided on the rectangular frame, and the pulley 15 facilitates the vertical movement of the frame along the slide during cleaning or disassembly. After the gas in the anoxic bin enters the air inlet of the rectangular bin body, it is gradually released into the sewage in the rectangular bin body through the air holes of the aeration pipe. The pulley arranged in the bin facilitates the removal and cleaning of the frame after long-term use.

[0039] like Figure 7 , 8As shown in Figures 9 and 12, the packing assembly includes a plurality of groups of support rods 16 arranged on the frame 6, and each group of support rods 16 is parallel to each other and arranged in a step-like manner. The support rods 16 are rotatably connected to the frame, so that they can rotate when triggered by the rising gas in the aeration, and also facilitate the shedding of the aged microbial film layer. A plurality of packing blocks 17 are arranged at equal intervals on the support rods 16. The packing blocks in this embodiment are preferably sponge blocks, which are cross-shaped structures to facilitate the attachment of microorganisms.

[0040] like Fig.10 , 11 As shown, in Example 4, on the basis of Example 3, the gas slow-release assembly includes a plurality of first slow-release plates 18 and a plurality of second slow-release plates 19, the first slow-release plates 18 are arranged between adjacent support rods 16, one end of the first slow-release plates 18 is aligned with the lower support rod 16, and the other end is aligned with the higher support rod 16. The second slow-release plates 19 are all fixedly arranged on the frame 6 in parallel, and are all arranged in parallel between two adjacent groups of support rods 16. One end of the second slow-release plate 19 is provided with a gas gap 32, and the gas gap 32 is arranged on the lower side of the stepped support rods 16. The first slow-release plate 18 and the second slow-release plate 19 are both provided with slow-release gas holes 20, and the bottom is provided with a gas storage baffle ring 21. The gas storage baffle ring can form a gas cavity at the bottom of the first slow-release plate and the second slow-release plate, which can not only meet the gas release requirements of the slow-release gas holes, but also increase the contact area between the gas and the sewage, and also increase the residence time of the gas inside the sewage, thereby increasing the utilization and absorption efficiency of oxygen. The first slow-release plate 18 is tilted, and one end of the first slow-release plate close to the higher support rod 16 is higher than the other end. The tilted arrangement facilitates the gas to gradually float up along the tilt direction of the first slow-release plate arranged in a stepped manner. Fig. 9 As shown, in this embodiment, each group of support rods and their corresponding first slow-release plates are arranged in two layers in a stepped manner, which can improve the slow-release effect of the structure on gas; increasing the setting density of the filler blocks on the support rods can increase the sewage treatment efficiency.

[0041] Embodiment 5, based on embodiment 4, the number of cleaning components is consistent with the number of groups of support rods 16 and are respectively arranged between adjacent second slow-release plates 19, and the cleaning components include a sliding rod 24 slidably arranged on the frame 6 along the length direction of the support rod 16. In this embodiment, Figure 6 , 7, a support block 40 with a circular hole is provided on the frame 6, and the sliding rod is inserted into the circular hole on the support block. One end of the sliding rod 24 is connected to a handle 25, and the other end is connected to a scraper 33. The scraper 33 is provided with an opening 26 that allows the support rod 16, the filler block 17, and the first slow-release plate 18 to pass through. The opening 26 is provided with a brush that matches the upper surface of the first slow-release plate 18, and the bottom of the scraper 33 is provided with a brush that matches the upper surface of the second slow-release plate 19. When the second slow-release plate and the first slow-release plate are to be cleaned, the sewage in the slow-release aeration bin needs to be discharged, and then the frame is pulled out of the rectangular bin body, and the handle is pulled to drive the scraper to move along the axial direction of the support rod through the sliding rod. The brush at the opening and the brush at the bottom of the scraper clean the surface of the second slow-release plate and the second slow-release plate respectively, and brush the dirt on them to one end of the frame. Since the internal structure of the frame is dense, conventional cleaning methods are difficult to carry out, so setting a cleaning component can make the cleaning efficiency higher.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-energy sewage treatment system, comprising a septic tank (1), a grid bin (2), and a sedimentation bin (3) arranged in series, characterized in that: An anoxic bin (4) and a slow-release aeration bin (5) are arranged in series between the grid bin (2) and the sedimentation bin (3) from high to low; The anoxic bin (4) is provided with at least two levels from top to bottom, the water inlet and the water outlet of the anoxic bin (4) are both provided at the bottom, the water inlet of the first-level anoxic bin (4) is connected to the water outlet of the grid bin (2), the water outlet of each anoxic bin (4) is connected to the slow-release aeration bin (5), the water outlet of the upper-level anoxic bin (4) is connected to the water inlet of the lower-level anoxic bin (4), the top of the anoxic bin (4) is provided with an air inlet and an air outlet, the air outlet is connected to the slow-release aeration bin (5), and a piston assembly is provided inside the anoxic bin (4); The slow-release aeration bin (5) is provided with a frame (6), a filler assembly and a gas slow-release assembly are provided on the frame (6), the filler assembly and the gas slow-release assembly are arranged alternately in a stepped manner, and a cleaning assembly that cooperates with the gas slow-release assembly is provided on the frame (6); The anoxic chamber (4) comprises a cylindrical body, the bottom of which is provided with two water outlets and one water inlet, the two water outlets being respectively connected to the water inlet of the next-stage anoxic chamber (4) and the slow-release aeration chamber (5) through a water delivery pipe (30); the top of the cylindrical body is provided with an air inlet and an air outlet, the air inlet is connected to an air inlet pipe (8), the air outlet is connected to the slow-release aeration chamber (5) through an air delivery pipe (9), the air inlet pipe (8), the air delivery pipe (9) and the water delivery pipe (30) are all provided with valves (7), the air delivery pipe (9) is provided with a throttle valve (23), and the valve (7) and the throttle valve (23) are both connected to a controller; The piston assembly comprises a cylindrical plug body (10) coaxially and vertically arranged inside a cylindrical barrel body, the side wall of the cylindrical plug body (10) is provided with at least two grooves, each groove is provided with a rubber sealing ring (11), and the top and bottom of the cylindrical barrel body are provided with limit sensors (12), and the limit sensors (12) are connected to a controller.

2. The low-energy sewage treatment system according to claim 1 is characterized in that: The slow-release aeration bin (5) comprises a rectangular bin body (13), the top of the rectangular bin body (13) is open, an air inlet is provided at the bottom of the rectangular bin body (13) and the air inlet is connected to the gas pipeline (9), at least two aeration pipes (31) connected to the air inlet are provided in parallel at the bottom of the rectangular bin body (13), and a plurality of air holes are provided on the aeration pipes (31); a slide groove (14) is vertically provided in the rectangular bin body (13), and the frame (6) is slidably connected to the rectangular bin body (13) via the slide groove (14).

3. The low-energy sewage treatment system according to claim 2 is characterized in that: The frame (6) is a rectangular frame, on which a pulley (15) is rotatably provided to match the slide groove (14).

4. The low-energy sewage treatment system according to claim 3 is characterized in that: The packing assembly comprises a plurality of groups of support rods (16) rotatably mounted on a frame (6), a plurality of packing blocks (17) being equidistantly arranged on the support rods (16), and each group of support rods (16) being parallel to each other and arranged in a stepped manner.

5. The low energy consumption sewage treatment system according to claim 4 is characterized in that: The gas slow-release assembly comprises a plurality of first slow-release plates (18) and a plurality of second slow-release plates (19); the first slow-release plates (18) are arranged between adjacent support rods (16); one end of the first slow-release plates (18) is aligned with the lower support rod (16), and the other end is aligned with the higher support rod (16); the second slow-release plates (19) are all fixedly arranged on the frame (6) in parallel, and are all arranged in parallel between two adjacent groups of support rods (16); one end of the second slow-release plates (19) is provided with a gas gap (32), and the gas gap (32) is arranged on the lower side of the support rods (16) arranged in a stepped manner.

6. The low energy consumption sewage treatment system according to claim 5, characterized in that: The first slow-release plate (18) and the second slow-release plate (19) are both provided with slow-release air holes (20), and both are provided with air storage baffle rings (21) at the bottom; the first slow-release plate (18) is arranged obliquely, and one end thereof close to the higher support rod (16) is higher than the other end.

7. The low energy consumption sewage treatment system according to claim 6, characterized in that: The number of the cleaning components is consistent with the number of groups of support rods (16) and are respectively arranged between adjacent second slow-release plates (19). The cleaning components include a sliding rod (24) slidably arranged on the frame (6) along the length direction of the support rod (16). One end of the sliding rod (24) is connected to a handle (25) and the other end is connected to a scraper (33). The scraper (33) is provided with an opening (26) for the support rod (16), the filling block (17), and the first slow-release plate (18) to pass through. The opening (26) is provided with a brush that cooperates with the upper surface of the first slow-release plate (18). The bottom of the scraper (33) is provided with a brush that cooperates with the upper surface of the second slow-release plate (19).

8. The low-energy sewage treatment system according to any one of claims 1 to 7, characterized in that: A standby blower (22) is connected to the bottom of the slow-release aeration bin (5).

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