Modularized domestic sewage treatment system

Abstract

The invention belongs to the technical field of domestic sewage treatment, and particularly relates to a modular domestic sewage treatment system which comprises a cement base, a primary sedimentation tank, an aeration tank, a secondary sedimentation tank and a filtration and disinfection tank are sequentially arranged at the top of the cement base from left to right, and pretreatment, biological treatment, secondary sedimentation and filtration and disinfection of sewage are achieved. The primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are hung on the cement base through lifting lugs, are connected to sliding grooves in a rolling manner through pulleys at the bottoms and are convenient to move, so that the front sides and the rear sides of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are limited through L-shaped plates and stop blocks, and the operation is convenient. Therefore, modularization of the domestic sewage treatment system is achieved, a certain module can be independently maintained and replaced, the photovoltaic power generation assembly is installed on the front side of the top of the cement base, power is supplied to the treatment system through solar power generation, and environmental protection and energy saving are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of domestic sewage treatment, and in particular to a modular domestic sewage treatment system. Background Art

[0002] Domestic sewage refers to the sewage discharged after people use clean water in their daily lives. Domestic sewage is a major component of urban sewage. In order to save water resources, treating sewage for reuse has become a major focus of water conservation. Modern sewage treatment technology can be divided into primary, secondary and tertiary treatment processes according to the degree of treatment. Primary sewage treatment uses physical methods such as screening and sedimentation to remove insoluble suspended solids and floating substances in sewage. Secondary sewage treatment mainly uses biological treatment methods, that is, the process of material transformation through the metabolism of microorganisms, oxidizing and degrading various complex organic substances in sewage into simple substances. Biological treatment has certain requirements for sewage quality, water temperature, dissolved oxygen content in water, pH value, etc. Tertiary sewage treatment is based on primary and secondary treatment, and uses physical and chemical methods such as coagulation, filtration, ion exchange, and reverse osmosis to remove insoluble organic matter, phosphorus, nitrogen and other nutrients in sewage. The composition of pollutants in sewage is very complex, and it often requires a combination of the above methods to meet the treatment requirements.

[0003] The existing methods of treating domestic sewage are mostly large-scale sewage treatment plants. Not only is the operating energy consumption high, but the cost of laying pipelines during sewage transportation is also high. In addition, most of the existing sewage treatment devices are integrated devices, which is inconvenient to repair and replace certain parts. For this reason, we propose a modular domestic sewage treatment system. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a modular domestic sewage treatment system. A primary sedimentation tank, an aeration tank, a secondary sedimentation tank and a filtration and disinfection tank are arranged on the top of a cement base from left to right in sequence, so as to realize pretreatment, biological treatment, secondary sedimentation and filtration and disinfection of sewage. The domestic sewage treatment system is modularized, and a certain module can be repaired and replaced separately. A photovoltaic power generation component is installed on the top front side of the cement base, and the treatment system is powered by solar power generation, thereby realizing environmental protection and energy saving and solving the background problem.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a modular domestic sewage treatment system, including a cement base, the top of which is provided with a primary sedimentation tank, an aeration tank, a secondary sedimentation tank and a filtration and disinfection tank from left to right in sequence, two sets of pulleys are installed on the front and rear sides of the bottoms of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank, a plurality of slide grooves are opened on the top of the cement base, the pulleys are rotatably connected to the slide grooves, a plurality of blocks are fixedly connected to the rear side of the top of the cement base, the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are fixedly connected to the rear side of the top of the cement base, and the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are fixedly connected to the rear side of the top of the cement base. The rear sides of the primary sedimentation tank, secondary sedimentation tank and filtration and disinfection tank are all in contact with the front side of the block, and a number of L-shaped plates are fixedly installed on the top of the cement base. The front sides of the primary sedimentation tank, aeration tank, secondary sedimentation tank and filtration and disinfection tank are all in contact with the rear side of the L-shaped plate. A sewage pretreatment component is arranged inside the primary sedimentation tank, a stirring component and an aeration component are installed inside the aeration tank, a mud discharge component is installed inside the secondary sedimentation tank, a disinfection filtration component is installed inside the filtration and disinfection tank, and a photovoltaic power generation component is installed on the top front side of the cement base.

[0006] Preferably, the sewage pretreatment component includes an interception frame, which is arranged on the inner left side of the primary sedimentation tank. A plurality of strip grooves are opened through the interception frame. Two sets of hooks are fixedly connected to the front and rear sides of the top of the interception frame. The top bottom side of the hook abuts against the top side of the side wall of the primary sedimentation tank. An inlet pipe is passed through the top left side of the primary sedimentation tank.

[0007] Preferably, the stirring assembly includes a driving motor, a mounting plate is fixedly connected to the top of the aeration tank, the driving motor is fixedly mounted on the top of the mounting plate, a mounting shell is also fixedly connected to the top of the mounting plate, a worm wheel is rotatably mounted inside the mounting shell, a worm is rotatably penetrated through the front side of the mounting shell, the worm is meshed with the worm wheel, a pulley 1 is fixedly connected to the right end of the worm, a pulley 2 is fixedly connected to the output shaft end of the driving motor, a belt is tensionedly sleeved between the pulleys 1 and 2, a rotating rod is fixedly connected to the bottom of the worm wheel, the bottom end of the rotating rod is rotatably extended into the interior of the aeration tank, and a plurality of stirring blades are fixedly connected to the outer surface of the rotating rod.

[0008] Preferably, the aeration assembly includes a fan, which is fixedly installed on the front side of the aeration tank, an outlet pipe is fixedly installed on the inner front side of the aeration tank, a plurality of aeration heads are fixedly connected to the rear side of the outlet pipe, and the output end of the fan is fixedly connected to the left end of the outlet pipe through a pipeline.

[0009] Preferably, the mud discharge assembly includes a mud storage tank, which is arranged at the bottom of the secondary sedimentation tank, and the rear side of the secondary sedimentation tank is fixedly connected with a mud discharge pipe, the front end of the mud discharge pipe extends into the interior of the mud storage tank, and a sludge return pump is fixedly installed on the left side of the top of the secondary sedimentation tank, the input end and output end of the sludge return pump are respectively fixedly connected with a mud suction pipe and a mud return pipe, the bottom end of the mud suction pipe extends into the interior of the mud storage tank, and the bottom end of the mud return pipe extends into the interior of the aeration tank.

[0010] Preferably, the disinfection filtration component includes a dosing pump, the output end of the dosing pump is fixedly connected to a drug outlet pipe, the bottom end of the drug outlet pipe extends into the interior of the filtration and disinfection tank, the first filter plate and the second filter plate are respectively installed on the upper and lower sides of the interior of the filtration and disinfection tank, and the right bottom of the filtration and disinfection tank is fixedly connected to a water outlet pipe.

[0011] Preferably, the photovoltaic power generation assembly includes a solar photovoltaic panel and a battery pack, and the solar photovoltaic panel and the battery pack are both fixedly mounted on the top front side of the cement base.

[0012] Preferably, a lift pump 1 is fixedly installed on the top right side of the primary settling tank, and the input and output ends of the lift pump 1 are connected to the primary settling tank and the aeration tank through pipes respectively; a lift pump 2 is fixedly installed on the top right side of the aeration tank, and the input and output ends of the lift pump 2 are connected to the aeration tank and the secondary settling tank through pipes respectively; a lift pump 3 is fixedly installed on the top right side of the secondary settling tank, and the input and output ends of the lift pump 3 are connected to the secondary settling tank and the filtration and disinfection tank through pipes respectively.

[0013] Preferably, a plurality of filter holes 1 are formed through the first filter plate, a plurality of filter holes 2 are formed through the second filter plate, and the diameter of the filter holes 1 is greater than the diameter of the filter holes 2.

[0014] Preferably, the front and rear sides of the tops of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are fixedly welded with lifting ears.

[0015] The present invention provides a modular domestic sewage treatment system. Compared with the prior art, it has the following advantages:

[0016] Beneficial effects:

[0017] 1. A modular domestic sewage treatment system is provided with a primary sedimentation tank, an aeration tank, a secondary sedimentation tank and a filtration and disinfection tank on the top of a cement base from left to right, so as to realize pretreatment, biological treatment, secondary sedimentation and filtration and disinfection of sewage. The primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are hoisted on the cement base through lifting ears, and the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are connected to the slide groove by rolling pulleys at the bottom, so as to facilitate sliding and limit the position at the same time, and then limit the front and rear sides of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank through L-shaped plates and blocks, so that the domestic sewage treatment system is modularized and a certain module can be repaired and replaced separately.

[0018] 2. This modular domestic sewage treatment system has a photovoltaic power generation component installed on the top front side of the cement base. The treatment system is powered by solar power generation, achieving environmental protection and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the front view structure of the main body of the present invention;

[0020] Figure 2 It is a schematic diagram of the main structure of the present invention from a top view;

[0021] Figure 3 It is a schematic diagram of the front cross-sectional structure of the main body of the present invention;

[0022] Figure 4 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 5 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0024] Figure 6 For the present invention Figure 2 Enlarged schematic diagram of the structure at point C in the middle.

[0025] In the figure: 1. cement base; 2. primary sedimentation tank; 3. aeration tank; 4. secondary sedimentation tank; 5. filtration and disinfection tank; 6. solar photovoltaic panel; 7. outlet pipe; 8. chute; 9. battery pack; 10. inlet pipe; 11. lifting lug; 12. lifting pump 1; 13. lifting pump 2; 14. lifting pump 3; 15. fan; 16. sludge return pump; 17. outlet pipe; 18. dosing pump; 19. block; 20. interception frame; 21. hook; 22. mounting plate; 23. rotating rod; 24. stirring blade; 25. mud storage tank; 26. mud outlet pipe; 27. first filter plate; 28. second filter plate; 29. ​​pulley; 30. L-shaped plate; 31. aeration head; 32. mounting shell; 33. worm gear; 34. worm; 35. pulley 1; 36. pulley 2; 37. belt; 38. driving motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, 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.

[0027] See also Figure 1-6 The present invention provides a technical solution: a modular domestic sewage treatment system, comprising a cement base 1, a primary sedimentation tank 2, an aeration tank 3, a secondary sedimentation tank 4 and a filtration and disinfection tank 5 are arranged on the top of the cement base 1 from left to right in sequence, two sets of pulleys 29 are installed on the front and rear sides of the bottoms of the primary sedimentation tank 2, the aeration tank 3, the secondary sedimentation tank 4 and the filtration and disinfection tank 5, a plurality of chutes 8 are opened on the top of the cement base 1, the pulleys 29 are rollingly connected to the chutes 8, a plurality of blocks 19 are fixedly connected to the rear side of the top of the cement base 1, the primary sedimentation tank 2, the aeration tank 3, The rear sides of the secondary settling tank 4 and the filtration and disinfection tank 5 are both in contact with the front side of the block 19, and a number of L-shaped plates 30 are fixedly installed on the top of the cement base 1. The front sides of the primary settling tank 2, the aeration tank 3, the secondary settling tank 4 and the filtration and disinfection tank 5 are all in contact with the rear side of the L-shaped plate 30. A sewage pretreatment component is arranged inside the primary settling tank 2, a stirring component and an aeration component are installed inside the aeration tank 3, a mud discharge component is installed inside the secondary settling tank 4, a disinfection and filtration component is installed inside the filtration and disinfection tank 5, and a photovoltaic power generation component is installed on the top front side of the cement base 1.

[0028] The domestic sewage treatment system is provided with a primary sedimentation tank 2, an aeration tank 3, a secondary sedimentation tank 4 and a filtration and disinfection tank 5 on the top of a cement base 1 from left to right in sequence. The primary sedimentation tank 2, the aeration tank 3, the secondary sedimentation tank 4 and the filtration and disinfection tank 5 all roll on a slide 8 opened on the top of the cement base 1 through two sets of pulleys 29 at the bottom, which is not only convenient for movement but also convenient for limiting. The front and rear sides of the primary sedimentation tank 2, the aeration tank 3, the secondary sedimentation tank 4 and the filtration and disinfection tank 5 are blocked and limited by an L-shaped plate 30 and a stopper 19, and the domestic sewage is preliminarily treated by a sewage pretreatment component, and then the domestic sewage is biologically treated by a stirring component and an aeration component. The treated sewage is discharged through a sludge discharge component after sedimentation in the secondary sedimentation tank 4, and then the precipitated water is disinfected and filtered through a disinfection and filtration component, and finally discharged. The domestic sewage treatment system is powered by a photovoltaic power generation component.

[0029] The sewage pretreatment component includes an interception frame 20, which is arranged on the left side inside the primary sedimentation tank 2. A number of strip grooves are opened through the interception frame 20. Two groups of hooks 21 are fixedly connected to the front and back sides of the top of the interception frame 20. The bottom side of the top of the hook 21 abuts against the top side of the side wall of the primary sedimentation tank 2. An inlet pipe 10 is passed through the top left side of the primary sedimentation tank 2.

[0030] Domestic sewage enters the primary sedimentation tank 2 through the water inlet pipe 10, and then is preliminarily filtered and intercepted by the interception frame 20, which is convenient for removing large-sized solid waste, gravel, grease, etc., and the interception frame 20 is hung on the primary sedimentation tank 2 by a hook 21, which is convenient for removing the interception frame 20. After the interception, the larger suspended solids in the primary sedimentation tank 2 sink due to gravity, and are thus separated, reducing the load of the subsequent treatment stage.

[0031] The stirring assembly includes a driving motor 38. A mounting plate 22 is fixedly connected to the top of the aeration tank 3. The driving motor 38 is fixedly installed on the top of the mounting plate 22. A mounting shell 32 is also fixedly connected to the top of the mounting plate 22. A worm gear 33 is rotatably installed inside the mounting shell 32. A worm 34 is rotatably penetrated through the front side of the mounting shell 32. The worm 34 meshes with the worm gear 33. A pulley 2 36 is fixedly connected to the output shaft end of the driving motor 38. A belt 37 is tensionedly sleeved between the pulley 1 35 and the pulley 2 36. A rotating rod 23 is fixedly connected to the bottom of the worm gear 33. The bottom end of the rotating rod 23 rotates and extends into the interior of the aeration tank 3. A plurality of stirring blades 24 are fixedly connected to the outer surface of the rotating rod 23.

[0032] The aeration assembly includes a fan 15, which is fixedly installed on the front side of the aeration tank 3. An outlet pipe 17 is fixedly installed on the inner front side of the aeration tank 3. The rear side of the outlet pipe 17 is fixedly connected to a plurality of aeration heads 31. The output end of the fan 15 is fixedly connected to the left end of the outlet pipe 17 through a pipeline.

[0033] After the domestic sewage enters the aeration tank 3, the fan 15 is first started to send air into the outlet pipe 17, and the domestic sewage is supplied with air through a plurality of aeration heads 31 fixedly connected to the outlet pipe 17, so as to provide necessary living conditions for the microorganisms. Then the drive motor 38 is started. The pulley 2 36 fixedly connected to the output shaft end of the drive motor 38 is tensioned and sleeved with the pulley 1 35 fixedly connected to the right end of the worm 34 through the belt 37, thereby rotating the worm 34. Since the worm 34 is meshed with the worm wheel 33, the worm wheel 33 is rotated, and then the rotating rod 23 is rotated. The sewage in the aeration tank 3 is stirred by a plurality of stirring blades 24 fixedly connected to the outer surface of the rotating rod 23, so as to strengthen the mixing of sewage and air, promote biodegradation and prevent sludge deposition.

[0034] The mud discharge assembly includes a mud storage tank 25, which is arranged at the bottom of the secondary sedimentation tank 4. A mud discharge pipe 26 is fixedly connected to the rear side of the secondary sedimentation tank 4, and the front end of the mud discharge pipe 26 extends into the interior of the mud storage tank 25. A sludge return pump 16 is fixedly installed on the left side of the top of the secondary sedimentation tank 4. The input end and output end of the sludge return pump 16 are respectively fixedly connected to a mud suction pipe and a mud return pipe. The bottom end of the mud suction pipe extends into the interior of the mud storage tank 25, and the bottom end of the mud return pipe extends into the interior of the aeration tank 3.

[0035] The sewage after biological treatment enters the secondary sedimentation tank 4 for sedimentation and accumulates in the sludge storage tank 25 at the bottom. The sludge in the sludge storage tank 25 is discharged through the sludge outlet pipe 26, and part of the sludge in the sludge storage tank 25 is re-transported to the aeration tank 3 through the sludge return pump 16 to maintain the microbial concentration in the aeration tank 3 and ensure continuous and effective sewage treatment.

[0036] The disinfection and filtration component includes a dosing pump 18, the output end of the dosing pump 18 is fixedly connected to a drug outlet pipe, the bottom end of the drug outlet pipe extends into the interior of the filtration and disinfection tank 5, and the first filter plate 27 and the second filter plate 28 are respectively installed on the upper and lower sides of the interior of the filtration and disinfection tank 5. The right bottom of the filtration and disinfection tank 5 is fixedly connected to a water outlet pipe 7.

[0037] Chemicals are added into the filtering and disinfecting pool 5 by the chemical dosing pump 18 to disinfect the sewage in the filtering and disinfecting pool 5 , and the sewage is doubly filtered and purified by the first filter plate 27 and the second filter plate 28 , and the purified water is discharged through the outlet pipe 7 .

[0038] The photovoltaic power generation assembly includes a solar photovoltaic panel 6 and a battery group 9 , and the solar photovoltaic panel 6 and the battery group 9 are both fixedly installed on the top front side of the cement base 1 .

[0039] The solar photovoltaic panel 6 absorbs solar energy to generate electricity, and the battery pack 9 stores electricity.

[0040] A lifting pump 12 is fixedly installed on the top right side of the primary settling tank 2, and the input end and output end of the lifting pump 12 are connected with the primary settling tank 2 and the aeration tank 3 through pipelines respectively. A lifting pump 2 13 is fixedly installed on the top right side of the aeration tank 3, and the input end and output end of the lifting pump 2 13 are connected with the aeration tank 3 and the secondary settling tank 4 through pipelines respectively. A lifting pump 3 14 is fixedly installed on the top right side of the secondary settling tank 4, and the input end and output end of the lifting pump 3 14 are connected with the secondary settling tank 4 and the filtration and disinfection tank 5 through pipelines respectively.

[0041] The sewage in the primary sedimentation tank 2 is transported to the aeration tank 3 through the lifting pump 12, the sewage in the aeration tank 3 is transported to the secondary sedimentation tank 4 through the lifting pump 2 13, and the sewage in the secondary sedimentation tank 4 is transported to the filtration and disinfection tank 5 through the lifting pump 3 14.

[0042] The first filter plate 27 is provided with a plurality of filter holes 1, and the second filter plate 28 is provided with a plurality of filter holes 2. The diameter of the filter holes 1 is greater than the diameter of the filter holes 2, so that multi-stage filtration is achieved.

[0043] Lifting ears 11 are fixedly welded on the front and rear sides of the tops of the primary sedimentation tank 2, the aeration tank 3, the secondary sedimentation tank 4 and the filtering and disinfecting tank 5 for easy lifting.

[0044] Working principle: The domestic sewage treatment system is provided with a primary sedimentation tank 2, an aeration tank 3, a secondary sedimentation tank 4 and a filtration and disinfection tank 5 from left to right on the top of the cement base 1. The primary sedimentation tank 2, the aeration tank 3, the secondary sedimentation tank 4 and the filtration and disinfection tank 5 are all rolled on the slide 8 opened on the top of the cement base 1 through two sets of pulleys 29 at the bottom, which is not only convenient for movement but also for position limiting. The front and rear sides of the primary sedimentation tank 2, the aeration tank 3, the secondary sedimentation tank 4 and the filtration and disinfection tank 5 are blocked and limited by the L-shaped plate 30 and the block 19, realizing the modularization of the domestic sewage treatment system;

[0045] Domestic sewage enters the primary sedimentation tank 2 through the water inlet pipe 10, and then the domestic sewage is initially filtered and intercepted by the interception frame 20, which is convenient for removing large-sized solid waste, gravel and grease, and the interception frame 20 is hung on the primary sedimentation tank 2 through the hook 21, which is convenient for removing the interception frame 20. After the domestic sewage is intercepted, the larger suspended solids in the primary sedimentation tank 2 sink due to gravity and are separated, thereby reducing the load of the subsequent treatment stage. Then, the sewage in the primary sedimentation tank 2 is transported to the aeration tank 3 through the lifting pump 12. After the domestic sewage enters the aeration tank 3, the fan 15 is first started to send air into the outlet pipe 17, and the air is sent to the aeration tank 3 through the outlet pipe 17. A plurality of aeration heads 31 fixedly connected to each other with respect to 17 supply air to the domestic sewage, providing necessary living conditions for the microorganisms, and then starting the driving motor 38. Since the output shaft end of the driving motor 38 is fixedly connected to the pulley 2 36, and the pulley 1 35 fixedly connected to the right end of the worm 34 is tensioned and sleeved through the belt 37, the worm 34 is rotated. Since the worm 34 is meshed with the worm wheel 33, the worm wheel 33 is rotated, and then the rotating rod 23 is rotated. The sewage in the aeration tank 3 is stirred by the plurality of stirring blades 24 fixedly connected to the outer surface of the rotating rod 23, and the sewage and air are mixed, and biological degradation is promoted and sludge deposition is prevented;

[0046] Then, the sewage in the aeration tank 3 is transported to the secondary sedimentation tank 4 for sedimentation through the lifting pump 2 13, and is accumulated in the sludge storage tank 25 at the bottom, and the sludge in the sludge storage tank 25 is discharged through the sludge outlet pipe 26, and part of the sludge in the sludge storage tank 25 is re-transported to the aeration tank 3 through the sludge return pump 16 to maintain the microbial concentration in the aeration tank 3 and ensure continuous and effective sewage treatment. Then, the sewage in the secondary sedimentation tank 4 is transported to the filtration and disinfection tank 5 through the lifting pump 3 14, and the filtration and disinfection tank 5 is dosing through the dosing pump 18 to disinfect the sewage in the filtration and disinfection tank 5, and the sewage is doubly filtered and purified through the first filter plate 27 and the second filter plate 28, and the purified water is discharged through the outlet pipe 7, and the domestic sewage treatment system absorbs solar energy through the solar photovoltaic panel 6 to generate electricity, and stores electricity through the battery group 9 to power the treatment system.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular domestic sewage treatment system, comprising a cement base, characterized in that: A primary sedimentation tank, an aeration tank, a secondary sedimentation tank and a filtration and disinfection tank are arranged on the top of the cement base from left to right in sequence, and two sets of pulleys are installed on the front and back sides of the bottoms of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank. A plurality of slide grooves are opened on the top of the cement base, and the pulleys are rollingly connected to the slide grooves. A plurality of pulleys are fixedly connected to the rear side of the top of the cement base. The rear sides of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are all abutted against the front side of the block. A plurality of L-shaped plates are fixedly installed on the top of the cement base, and the front sides of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtration and disinfection tank are all abutted against the rear side of the L-shaped plate. A sewage pretreatment component is arranged inside the primary sedimentation tank, a stirring component and an aeration component are installed inside the aeration tank, a mud discharge component is installed inside the secondary sedimentation tank, a disinfection filtration component is installed inside the filtration and disinfection tank, and a photovoltaic power generation component is installed on the front side of the top of the cement base.

2. A modular domestic sewage treatment system according to claim 1, characterized in that: The sewage pretreatment component includes an interception frame, which is arranged on the left side inside the primary sedimentation tank. A plurality of strip grooves are opened through the interception frame. Two sets of hooks are fixedly connected to the front and rear sides of the top of the interception frame. The bottom side of the top of the hook abuts against the top side of the side wall of the primary sedimentation tank. An inlet pipe is passed through the top left side of the primary sedimentation tank.

3. A modular domestic sewage treatment system according to claim 1, characterized in that: The stirring assembly includes a driving motor, a mounting plate is fixedly connected to the top of the aeration tank, the driving motor is fixedly installed on the top of the mounting plate, the top of the mounting plate is also fixedly connected to a mounting shell, a worm wheel is rotatably installed inside the mounting shell, a worm is rotatably penetrated by a worm on the front side of the mounting shell, the worm is meshed with the worm wheel, a pulley 1 is fixedly connected to the right end of the worm, a pulley 2 is fixedly connected to the output shaft end of the driving motor, a belt is tensionedly sleeved between the pulley 1 and the pulley 2, a rotating rod is fixedly connected to the bottom of the worm wheel, the bottom end of the rotating rod is rotatably extended into the interior of the aeration tank, and a plurality of stirring blades are fixedly connected to the outer surface of the rotating rod.

4. A modular domestic sewage treatment system according to claim 1, characterized in that: The aeration assembly includes a fan, which is fixedly installed on the front side of the aeration tank. An air outlet pipe is fixedly installed on the front side of the aeration tank. The rear side of the air outlet pipe is fixedly connected to a plurality of aeration heads. The output end of the fan is fixedly connected to the left end of the air outlet pipe through a pipeline.

5. A modular domestic sewage treatment system according to claim 1, characterized in that: The mud discharge assembly includes a mud storage tank, which is arranged at the bottom of the secondary sedimentation tank. The rear side of the secondary sedimentation tank is fixedly connected with a mud discharge pipe, and the front end of the mud discharge pipe extends into the interior of the mud storage tank. A sludge return pump is fixedly installed on the left side of the top of the secondary sedimentation tank. The input end and output end of the sludge return pump are respectively fixedly connected with a mud suction pipe and a mud return pipe. The bottom end of the mud suction pipe extends into the interior of the mud storage tank, and the bottom end of the mud return pipe extends into the interior of the aeration tank.

6. A modular domestic sewage treatment system according to claim 1, characterized in that: The disinfection and filtration component includes a dosing pump, the output end of the dosing pump is fixedly connected to a drug outlet pipe, the bottom end of the drug outlet pipe extends into the interior of the filtration and disinfection tank, the first filter plate and the second filter plate are respectively installed on the upper and lower sides of the interior of the filtration and disinfection tank, and the right bottom of the filtration and disinfection tank is fixedly connected to a water outlet pipe.

7. A modular domestic sewage treatment system according to claim 1, characterized in that: The photovoltaic power generation assembly comprises a solar photovoltaic panel and a battery group, and the solar photovoltaic panel and the battery group are both fixedly installed on the top front side of the cement base.

8. A modular domestic sewage treatment system according to claim 1, characterized in that: A lifting pump 1 is fixedly installed on the top right side of the primary settling tank, and the input end and output end of the lifting pump 1 are connected with the primary settling tank and the aeration tank through pipelines respectively. A lifting pump 2 is fixedly installed on the top right side of the aeration tank, and the input end and output end of the lifting pump 2 are connected with the aeration tank and the secondary settling tank through pipelines respectively. A lifting pump 3 is fixedly installed on the top right side of the secondary settling tank, and the input end and output end of the lifting pump 3 are connected with the secondary settling tank and the filtration and disinfection tank through pipelines respectively.

9. A modular domestic sewage treatment system according to claim 6, characterized in that: The first filter plate is provided with a plurality of filter holes 1, and the second filter plate is provided with a plurality of filter holes 2. The diameter of the filter holes 1 is greater than the diameter of the filter holes 2.

10. A modular domestic sewage treatment system according to claim 1, characterized in that: The front and rear sides of the tops of the primary sedimentation tank, the aeration tank, the secondary sedimentation tank and the filtering and disinfecting tank are all fixedly welded with lifting ears.

Images