Rural sewage harmless treatment circulating system and research method

Abstract

The application discloses a rural sewage harmless treatment circulating system and a research method, relates to the technical field of sewage treatment, and comprises a primary sedimentation chamber, an anaerobic chamber, an aerobic chamber and a secondary sedimentation chamber, wherein a filter layer is arranged in the primary sedimentation chamber; the anaerobic chamber is communicated with a primary sedimentation effluent pipe; the aerobic chamber is communicated with an anaerobic effluent pipe, and the anaerobic chamber and the aerobic chamber are both provided with suspended filler; the secondary sedimentation chamber is communicated with an aerobic effluent pipe, and a filter layer is arranged in the secondary sedimentation chamber; a hollow aeration tank is arranged at the bottom of the aerobic chamber, a through hole is formed in the bottom of the aeration tank, an air inlet pipe is arranged in the aeration tank, a partition plate is arranged in the aeration tank, the partition plate is located below the pipe opening of the air inlet pipe and is sealingly connected with the inner wall of the aeration tank, a plurality of aeration holes are formed through the partition plate, a blocking prevention block is slidingly connected below the partition plate, the blocking prevention block is in one-to-one correspondence with the aeration holes, and the blocking prevention block can open or cut off the aeration holes in the sliding process. The application has the effect of reducing the cost of sewage treatment and later maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a harmless treatment and recycling system for rural sewage and a research method. BACKGROUND

[0002] Strengthening the research on rural sewage treatment technology, improving the current situation of rural sewage treatment, collecting and treating rural sewage to make it meet the discharge standard or be recycled, is an effective way to improve and strengthen rural domestic sewage treatment. Strengthening rural domestic sewage treatment is of great significance to improving the rural ecological environment, the living environment of villagers, improving the quality of life of villagers, and preventing pollution of rural water resources.

[0003] At present, in the sewage treatment industry, the commonly used sewage treatment processes include physical method, chemical method, physical-chemical method and biological method. Among them, the biological treatment method generally has the step of treating pollutants by aerobic bacteria. In order to ensure the activity of aerobic bacteria, aeration is often carried out in the sewage treatment tank. The biological treatment method has the advantages of good purification effect, short sedimentation time, high efficiency, good effluent quality, and impact resistance.

[0004] However, the current rural domestic sewage treatment process has the difficulty of large investment in infrastructure equipment and high operation and management cost. The economic strength and technical force of rural areas are now still difficult to meet the requirements of large-scale sewage treatment process technology. At the same time, the sewage treatment equipment is operated in a relatively dirty environment for a long time, and the aeration equipment for biological treatment often occurs blockage, which requires professional management personnel and technical personnel to maintain regularly, and the maintenance cost is high. SUMMARY

[0005] In order to improve the situation that the cost of conventional sewage treatment process is high and the maintenance cost of sewage treatment equipment is high, the present application provides a harmless treatment and recycling system for rural sewage and a research method.

[0006] On the one hand, the present application provides a harmless treatment and recycling system for rural sewage, which adopts the following technical scheme:

[0007] A harmless treatment and recycling system for rural sewage, comprising

[0008] A primary sedimentation chamber, one side of which is communicated with a primary sedimentation inlet pipe, and the other side is communicated with a primary sedimentation outlet pipe, and a filter layer is arranged in the primary sedimentation chamber;

[0009] An anaerobic chamber, which is communicated with the primary sedimentation outlet pipe, one side of which is communicated with an anaerobic outlet pipe, and a three-dimensional net-shaped filler is arranged in the anaerobic chamber;

[0010] An aerobic chamber, which is communicated with the anaerobic outlet pipe, one side of which is communicated with an aerobic outlet pipe, and a suspended filler is arranged in the aerobic chamber;

[0011] The secondary sedimentation chamber is communicated with the aerobic effluent pipe, and one side of the secondary sedimentation chamber is communicated with a drain pipe, and a filter layer is arranged in the secondary sedimentation chamber.

[0012] The bottom of the aerobic chamber is provided with a hollow aeration tank, the bottom of the aeration tank is provided with a through hole, and an air inlet pipe is arranged in the aeration tank, one end of the air inlet pipe penetrates the aerobic chamber and is used for communicating with a gas supply device, a partition plate is arranged in the aeration tank, the partition plate is located below the air inlet pipe and is sealingly connected with the inner wall of the aeration tank, a plurality of aeration holes are formed in the partition plate, a blockage prevention block is slidingly connected below the partition plate, the blockage prevention block corresponds to the aeration holes one by one, and the blockage prevention block can open or block the aeration holes in the sliding process, and a driving assembly for driving the blockage prevention block to slide is further arranged in the aeration tank.

[0013] By adopting the above technical scheme, the rural sewage harmless treatment circulating system sequentially comprises a primary sedimentation chamber, an anaerobic chamber, an aerobic chamber and a secondary sedimentation chamber. After the rural domestic sewage is discharged into the system, the pollutants in the sewage are sequentially subjected to primary sedimentation in the primary sedimentation chamber, decomposition by bacteria generated on the biological filler in the anaerobic chamber and the aerobic chamber, and secondary sedimentation in the secondary sedimentation chamber, and the pollutants in the sewage are filtered, decomposed and screened out, so that the harmless treatment of the sewage is realized. The purified sewage can be safely discharged, realizing the recycling of the sewage. The entire treatment system can effectively reduce the cost of system construction while realizing the purification and treatment of the sewage. The aeration tank is arranged in the aerobic chamber, and the partition plate and the slidable blockage prevention block are arranged in the aeration tank. The external air can enter the sealed chamber separated by the partition plate in the aeration tank through the air inlet pipe. With the entry of the air, the air pressure in the sealed chamber gradually increases until the air pressure pushes the blockage prevention block away. At this time, the aeration holes are open, and the air enters the aerobic chamber through the aeration holes and the through hole at the bottom of the aeration tank in sequence. When the air stops entering, the driving assembly drives the blockage prevention block to move, so that the blockage prevention block blocks and seals the aeration holes, effectively reducing the blockage of the aeration holes by the flocculent pollutants deposited in the sewage, thereby reducing the cost of maintaining the equipment in the later period.

[0014] Optionally, the driving assembly comprises a mounting frame and an elastic member. The side wall of the mounting frame is abutted and slidingly connected with the inner wall of the aeration tank. The elastic member is arranged between the mounting frame and the partition plate, and the two ends of the elastic member are connected with the mounting frame and the partition plate, respectively. The blockage prevention block is fixed to the side of the mounting frame close to the partition plate.

[0015] By adopting the above technical scheme, when the air pressure is large, the air pressure drives the blockage prevention block to move, and the aeration holes are opened. At this time, the mounting frame moves with the blockage prevention block, the elastic member is elongated and stores elastic potential energy. When the air stops entering, the air pressure in the sealed chamber in the aeration tank decreases, the elastic potential energy stored by the elastic member makes the elastic member restore the deformation, drives the mounting plate to move together with the blockage prevention block, and finally the blockage prevention block seals the aeration holes.

[0016] Optionally, the anti-blocking block is provided with a first taper surface near one end of the partition plate, and the tip of the first taper surface faces the partition plate.

[0017] By adopting the above technical scheme, the anti-blocking block is provided with a first taper surface near one end of the partition plate, and the tip of the first taper surface faces the partition plate. When air passes out from the aeration hole, the air will form larger bubbles in the sewage in the aerobic chamber. The first taper surface on the anti-blocking block can cut the larger bubbles, so that the larger bubbles are dispersed into multiple smaller bubbles, effectively increasing the contact area of the bubbles with the sewage and the suspended filler, and providing the necessary oxygen for the reproduction of the aerobic bacteria on the suspended filler.

[0018] Optionally, a fixed frame is arranged on the top of the aerobic chamber, a vertical rotating shaft is rotatably connected to the bottom of the fixed frame, a spiral blade is arranged on the side wall of the rotating shaft, the spiral blade extends downward along the outer wall of the rotating shaft in a spiral manner, a surrounding cylinder is coaxially arranged on the outer side wall of the rotating shaft, the surrounding cylinder surrounds the spiral blade and rotates with the rotating shaft, the top surface of the surrounding cylinder is lower than the top of the spiral blade, and the distance between the spiral blade and the inner wall of the surrounding cylinder in the horizontal direction is smaller than the outer diameter of the suspended filler.

[0019] By adopting the above technical scheme, after the sewage is introduced into the aerobic chamber, the suspended filler will be suspended on the liquid surface of the sewage. At this time, an external force is applied to the spiral blade to make the spiral blade rotate. The rotating spiral blade will push the suspended filler into the surrounding cylinder. As the spiral blade continues to rotate, the spiral blade will continue to push the suspended filler downward until the suspended filler is pushed out from the bottom of the surrounding cylinder. The suspended filler will gradually float up to the liquid surface of the sewage due to its own buoyancy, so that the suspended filler can move up and down in the aerobic chamber, improving the contact effect of the suspended filler and the sewage, and avoiding the situation that the suspended filler floats on the water surface or is squeezed into a pile.

[0020] Optionally, a plurality of water passing holes are formed in the surrounding cylinder, and the water passing holes are formed in the horizontal direction.

[0021] By adopting the above technical scheme, the surrounding cylinder is provided with water passing holes, which facilitates the circulation of the sewage in and out of the surrounding cylinder. When the suspended filler circulates in and out of the surrounding cylinder, the sewage also circulates in and out of the surrounding cylinder, further improving the contact effect of the suspended filler and the sewage.

[0022] Optionally, a baffle is coaxially arranged below the rotating shaft, a plurality of second taper surfaces are arranged on the side face away from the surrounding cylinder, and the tips of the second taper surfaces face away from the surrounding cylinder.

[0023] By adopting the technical scheme, the bubbles from the bottom of the aeration tank into the aerobic chamber gradually float upwards, and the second conical surface on the baffle is encountered in the process of floating upwards, the second conical surface can further scatter the bubbles, and the contact effect of air and aerobic bacteria is improved.

[0024] Optionally, the baffle is arc-shaped, and the arc-shaped opening of the baffle faces the surrounding cylinder.

[0025] By adopting the technical scheme, the baffle is arc-shaped, and the arc-shaped opening of the baffle faces the surrounding cylinder, so that the bubbles can continuously rise along the arc-shaped baffle when floating upwards, reducing the obstruction of the baffle to the floating of the bubbles.

[0026] Optionally, the anaerobic chamber and the aerobic chamber are both inoculated with activated sludge inside.

[0027] By adopting the technical scheme, the anaerobic chamber and the aerobic chamber are started up by the sludge inoculation method, the water inflow of the equipment can be increased at the same time, short-term continuous water inflow is ensured, the hydraulic retention time is reduced, the biofilm can be quickly established, the time for forming the biofilm is shortened, and the construction efficiency is improved.

[0028] Optionally, the three-dimensional net-shaped filler and the suspended filler are both made of waste plastic shavings, waste iron shavings, loofah, and polyurethane materials.

[0029] By adopting the technical scheme, the fillers in the system are all made of waste plastic shavings, waste iron shavings, loofah, polyurethane, and other waste materials in daily life and production, realizing “waste treatment with waste”, completely harmless treatment of wastewater, providing a new idea for rural wastewater treatment, and at the same time, the raw materials are easy to obtain and cheap, reducing the treatment cost.

[0030] On the other hand, the application provides a research method of a rural wastewater harmless treatment circulating system, establishes and analyzes the rural wastewater harmless treatment circulating system according to any one of the above, including the following steps:

[0031] S1: analyzing the present situation, theoretically researching the wastewater treatment site, and inductively analyzing the wastewater discharge characteristics and treatment status;

[0032] S2: designing a detection scheme, researching the corresponding treatment technology, setting the equipment structure of the wastewater treatment, researching the influencing factors such as dissolved oxygen and reflux, and finally optimizing and forming an equipment operation scheme;

[0033] S3: testing and calculating, testing and running the rural wastewater harmless treatment circulating system, observing the system operation on site after the system runs, measuring the related data, calculating the data, calculating the system operation cost, and if the test data or operation cost calculation result is not ideal, the detection scheme is redesigned;

[0034] S4: construction of a pilot, if the test data or operating cost calculation results are ideal, then expand the pilot construction, continue to carry out pilot practice in the pilot project;

[0035] S5: result evaluation, summarize the operation of the pilot and evaluate the results.

[0036] Through the above technical scheme, the rural sewage harmless treatment circulating system is established, and after the system runs, the operation is observed and detected in the field in time, the operation data are calculated, analyzed and summarized, the design scheme is dynamically adjusted according to the data results of each working chamber, the harmless treatment effect of sewage is ensured, the cost of system establishment and operation is reduced, and a practical and effective research method is provided for rural sewage treatment.

[0037] In summary, the present application includes at least one of the following beneficial effects:

[0038] 1. By setting an aeration tank in the aerobic chamber, and setting a partition plate and a slidable anti-blocking block in the aeration tank, the anti-blocking block can guide or cut off the aeration hole under the push of air pressure and the drive of the driving assembly, so that the aeration tank can effectively reduce the blockage of the aeration hole by the flocculent pollutants deposited in the sewage, thereby reducing the cost of maintaining the equipment in the later period;

[0039] 2. By setting a rotating spiral blade and a surrounding cylinder in the aerobic chamber, the suspended filler in the aerobic chamber can move in and out of the surrounding cylinder, effectively improving the contact effect of the suspended filler with sewage and air;

[0040] 3. By using waste plastic shaving, waste iron shaving, loofah and polyurethane four kinds of solid waste as raw materials to prepare the biological filler required by the system, the "waste treatment with waste" is realized, the sewage is completely harmless treated, and the procurement cost of materials is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a schematic diagram of the whole working principle of the system according to the embodiment 1 of the present application;

[0042] Figure 2 is a sectional view schematic diagram of the internal structure of the aerobic chamber according to the embodiment 1 of the present application;

[0043] Figure 3 is Figure 2 the enlarged schematic diagram at A.

[0044] Explanation of reference signs: 1, primary sedimentation chamber; 11, primary sedimentation inlet pipe; 12, primary sedimentation outlet pipe; 2, anaerobic chamber; 21, anaerobic outlet pipe; 3, aerobic chamber; 31, suspended filler; 32, sewage backflow pipe; 33, aerobic outlet pipe; 4, secondary sedimentation chamber; 41, sludge backflow pipe; 42, drainage pipe; 5, blowdown hole; 6, aeration tank; 61, through hole; 62, air inlet pipe; 63, partition plate; 631, aeration hole; 64, mounting bracket; 65, anti-blocking block; 651, first taper surface; 66, elastic member; 7, fixing bracket; 71, rotating shaft; 72, helical blade; 73, surrounding cylinder; 731, water passage; 74, driving member; 75, baffle; 751, second taper surface. DETAILED DESCRIPTION

[0045] The following will be described in detail with reference to the accompanying drawings. Figures 1-3 The application is further described in detail.

[0046] Embodiment 1

[0047] Embodiment 1 of the application discloses a rural sewage harmless treatment circulating system, referring to Figure 1 The rural sewage harmless treatment circulating system sequentially comprises a primary sedimentation chamber 1, an anaerobic chamber 2, an aerobic chamber 3 and a secondary sedimentation chamber 4. The primary sedimentation chamber 1 is connected with a primary sedimentation inlet pipe 11 on one side and a primary sedimentation outlet pipe 12 on the other side. The anaerobic chamber 2 is connected with the primary sedimentation outlet pipe 12. A filter layer is fixed at a middle position inside the primary sedimentation chamber 1. The filter layer is made of activated carbon filter material. In addition, the filter layer can further comprise a filling layer of fine sand, pebbles and the like. The primary sedimentation inlet pipe 11 is located above the filter layer, and the primary sedimentation outlet pipe 12 is located below the filter layer. Rural domestic sewage enters the primary sedimentation chamber 1 from the primary sedimentation inlet pipe 11 for primary sedimentation. Organic matters in the sewage in a large particle state are removed in the primary sedimentation chamber 1 through gravity sedimentation and biological flocculation. Biological flocculation in the primary sedimentation zone can form a plurality of activated sludge zooglea, which can degrade and treat ammonia nitrogen in the organic matters. The sewage after primary sedimentation enters the anaerobic chamber 2 from the primary sedimentation outlet pipe 12 for further harmless treatment.

[0048] In other embodiments of the application, activated sludge can also be inoculated in the primary sedimentation chamber 1. The inoculated activated sludge can provide a living place for microorganisms, so that the sewage can be preliminarily biodegraded in the primary sedimentation chamber 1, improving the sewage treatment effect. In order to improve the overall impact resistance and treatment efficiency of the system, a regulating tank can also be additionally arranged outside the primary sedimentation inlet pipe 11 of the primary sedimentation chamber 1. The regulating tank has a certain fermentation and degradation effect. The sewage can first enter the regulating tank for fermentation and degradation, so that the sewage inlet is homogeneous and uniform.

[0049] Referring to Figure 1, the anaerobic chamber 2 is communicated with an anaerobic water outlet pipe 21, the aerobic chamber 3 is communicated with the anaerobic water outlet pipe 21, and the anaerobic chamber 2 and the aerobic chamber 3 are both inoculated with activated sludge. The activated sludge can also provide a living place for microorganisms or bacteria. Most of the large particles in the wastewater entering the anaerobic zone are removed in the primary sedimentation zone due to gravity sedimentation and biological flocculation. The anaerobic chamber 2 and the aerobic chamber 3 mainly remove water-soluble organic matter in the wastewater.

[0050] The anaerobic chamber 2 is fixed with a three-dimensional reticular filler. Since the anaerobic chamber 2 forms anaerobic bacteria, the fixed three-dimensional reticular filler can provide attachment support for the growth of microorganisms, so that a good biofilm can be formed on the three-dimensional reticular filler. In the later stage, the organic matter on the biofilm or activated sludge is decomposed and metabolized by microorganisms in the system as life nutrients to participate in biological biochemical reactions, thereby reducing the concentration of pollutants in water. The three-dimensional reticular filler can be made of waste plastic shavings, waste iron shavings, loofah, polyurethane and other waste materials in daily life and production, realizing "waste treatment with waste", completely harmless treatment of wastewater, providing a new idea for rural wastewater treatment, and at the same time, the raw materials are easy to obtain and cheap, reducing the treatment cost.

[0051] Referring to Figure 1 and Figure 2 , the wastewater enters the aerobic chamber 3 through the anaerobic water outlet pipe 21 for further harmless treatment, and the aerobic chamber 3 is also inoculated with activated sludge, which has the same effect as the activated sludge in the anaerobic chamber 2 and will not be described again. Unlike the anaerobic chamber 2, the aerobic chamber 3 lives aerobic bacteria. In order to ensure the survival environment of the aerobic bacteria, oxygen or air needs to be introduced into the aerobic chamber 3, so the suspended filler 31 is placed in the aerobic chamber 3. The suspended filler 31 is hollow spherical in appearance and filled with filler for the attachment of aerobic bacteria. After the wastewater is introduced into the aerobic chamber 3, the suspended filler 31 floats on the surface of the wastewater due to its own buoyancy. The microorganisms generated on the suspended filler 31 decompose the water-soluble organic matter in the wastewater. The aerobic chamber 3 is also communicated with a wastewater backflow pipe 32 between the primary sedimentation chamber 1 and the aerobic chamber 3. The backflow pipe can backflow the wastewater in the aerobic chamber 3 to the primary sedimentation chamber 1. The backflow of the wastewater backflow mixture to the primary sedimentation chamber 1 increases the residence time of the wastewater in the system, effectively improving the removal rate of organic pollutants.

[0052] The aerobic chamber 3 is communicated with an aerobic effluent pipe 33 on one side, the secondary settling chamber 4 is communicated with the aerobic effluent pipe 33, and the secondary settling chamber 4 is also fixedly filled with a filter layer, the filter layer includes activated carbon filler, sewage enters the secondary settling chamber 4 through the aerobic effluent pipe 33 to carry out secondary sedimentation, and the sewage treatment effect is further improved. The secondary settling chamber 4 is communicated with a sludge return pipe 41 with the anaerobic chamber 2, impurities in the sewage form sludge after sedimentation and flocculation, and the sludge returns to the anaerobic chamber 2 through the sludge return pipe 41 to be recycled. The secondary settling chamber 4 is communicated with a drain pipe 42 on one side, and the sewage that has been completely treated by harmless treatment can reach the direct discharge standard and is discharged through the drain pipe 42.

[0053] Therefore, after the sewage is sequentially treated in series by the system including the primary settling chamber 1, the anaerobic chamber 2, the aerobic chamber 3 and the secondary settling chamber 4, the sewage can be directly discharged, so that the rural sewage can be recycled. The primary settling chamber 1, the anaerobic chamber 2, the aerobic chamber 3 and the secondary settling chamber 4 are all communicated with a sewage discharge hole 5 at the bottom, and residues at the bottom of each chamber can be discharged through the sewage discharge hole 5 during later cleaning and maintenance.

[0054] With reference to Figure 2 and Figure 3 , the aerobic chamber 3 is fixedly provided with a hollow aeration tank 6 at the bottom, a plurality of through holes 61 are formed in the bottom of the aeration tank 6, and an air inlet pipe 62 is inserted into the aeration tank 6. One end of the air inlet pipe 62 away from the aeration tank 6 penetrates out of the aerobic chamber 3 and is used to communicate with a gas supply device such as an air compressor, a plurality of through holes 61 are formed in the side wall of the one end of the air inlet pipe 62 located in the aeration tank 6, and external air or oxygen can enter the aeration chamber through the through holes 61 of the air inlet pipe 62. A partition plate 63 is horizontally and sealingly fixed in the aeration tank 6, and the partition plate 63 is located below the through holes 61 on the air inlet pipe 62.

[0055] A plurality of aeration holes 631 are formed in the partition plate 63 in the vertical direction, and a mounting bracket 64 is slidingly connected below the partition plate 63 in the aeration tank 6. The mounting bracket 64 is hollow, and the side wall of the mounting bracket 64 abuts against the inner wall of the aeration tank 6. A plurality of anti-blocking blocks 65 are fixed to one side of the mounting bracket 64 close to the partition plate 63, and the anti-blocking blocks 65 correspond one-to-one to the aeration holes 631. One end of each anti-blocking block 65 close to the partition plate 63 is integrally formed with a first tapered surface 651, and the tip of the first tapered surface 651 faces the partition plate 63. During the up-and-down sliding movement of the mounting bracket 64, the tip of the first tapered surface 651 can be inserted into and block the aeration hole 631. A resilient member 66 is further arranged between the mounting bracket 64 and the partition plate 63, and the resilient member 66 can be a tension spring. The two ends of the resilient member 66 are fixedly connected with the mounting bracket 64 and the partition plate 63 respectively.

[0056] The external air can enter the sealed chamber separated by the partition plate 63 in the aeration tank 6 through the air inlet pipe 62. With the air entering, the air pressure in the sealed chamber gradually increases until the air pressure is large enough to push the anti-blocking block 65 away. At this time, the aeration hole 631 is open, the air enters the aerobic chamber 3 through the aeration hole 631 and the through hole 61 at the bottom of the aeration tank 6 in turn, and at this time the elastic member 66 is elongated and stores elastic potential energy. When the air stops entering, the air pressure in the sealed chamber in the aeration tank 6 decreases, and the elastic potential energy stored by the elastic member 66 makes the elastic member 66 restore the deformation, driving the mounting plate to move together with the anti-blocking block 65 until the anti-blocking block 65 blocks the aeration hole 631, so as to effectively reduce the flocculent pollutants deposited in the sewage from blocking the aeration hole 631, thereby reducing the cost of maintaining the equipment in the later period. At the same time, when the air passes out from the aeration hole 631, the air will form larger bubbles in the sewage in the aerobic chamber 3, and the first conical surface 651 on the anti-blocking block 65 can cut the larger bubbles, so that the larger bubbles are dispersed into multiple smaller bubbles, effectively increasing the contact area of the bubbles with the sewage and the suspended filler 31, and providing the necessary oxygen for the reproduction of the aerobic bacteria on the suspended filler 31.

[0057] With reference to Figure 2 , the fixed frame 7 is arranged at the top of the aerobic chamber 3, the vertical rotating shaft 71 is rotatably connected to the bottom of the fixed frame 7, and the end of the rotating shaft 71 away from the fixed frame 7 is rotatably connected to the top of the aeration tank 6. The spiral blade 72 is fixed to the side wall of the rotating shaft 71, the spiral blade 72 extends vertically downward along the outer wall of the rotating shaft 71, the surrounding cylinder 73 is coaxially sleeved and fixed to the outer side wall of the rotating shaft 71, and the surrounding cylinder 73 surrounds the spiral blade 72 and rotates with the rotating shaft 71. The top surface of the surrounding cylinder 73 is lower than the top of the spiral blade 72, and in the horizontal direction, the distance between the spiral blade 72 and the inner wall of the surrounding cylinder 73 is smaller than the outer diameter of the suspended filler 31, and the pitch of the spiral blade 72 is greater than the outer diameter of the suspended filler 31. At the same time, the driving member 74 is fixed to the top of the fixed frame 7, which can be a small servo motor, the output shaft of the driving member 74 penetrates the fixed frame 7 and is coaxially fixed with the rotating shaft 71, so that the driving member 74 can drive the rotating shaft 71 to rotate.

[0058] After the sewage is introduced into the aerobic chamber 3, the suspended filler 31 will be suspended on the surface of the sewage. At this time, an external force is applied to the spiral blade 72 to make the spiral blade 72 rotate. The rotating spiral blade 72 will push the suspended filler 31 into the surrounding cylinder 73. As the spiral blade 72 continues to rotate, the spiral blade 72 will push the suspended filler 31 to continuously descend until the suspended filler 31 is pushed out from the bottom of the surrounding cylinder 73. The suspended filler 31 will gradually float to the surface of the sewage due to its own buoyancy, so that the suspended filler 31 can move up and down in the aerobic chamber 3, improve the contact effect between the suspended filler 31 and the sewage, and avoid the situation that the suspended filler 31 floats on the water surface or is crowded together.

[0059] With referenceFigure 2 A plurality of water passing holes 731 are provided through the enclosing cylinder 73, and the water passing holes 731 are provided in the horizontal direction. The water passing holes 731 are provided to facilitate the flow of sewage in and out of the enclosing cylinder 73, and when the suspended filler 31 circulates in and out of the enclosing cylinder 73, the sewage also flows in and out of the enclosing cylinder 73, further improving the contact effect of the suspended filler 31 and the sewage, and the rotating enclosing cylinder 73 also plays a role in stirring the sewage.

[0060] The shaft 71 is coaxially sleeved and fixed with a baffle 75 below the enclosing cylinder 73, and the baffle 75 is arc-shaped as a whole, and the arc-shaped opening of the baffle 75 faces the enclosing cylinder 73. Meanwhile, a plurality of second conical surfaces 751 are fixed on the side of the baffle 75 away from the enclosing cylinder 73, and the tips of the second conical surfaces 751 face away from the enclosing cylinder 73. The arc-shaped baffle 75 enables the bubbles to continue to rise along the arc-shaped baffle 75 when they float up, reducing the obstruction of the baffle 75 to the floating of the bubbles. The bubbles entering the aerobic chamber 3 from the bottom of the aeration tank 6 gradually float up, and in the process of floating up, they encounter the second conical surfaces 751 on the rotating baffle 75. The rotating second conical surfaces 751 can further scatter the bubbles, improving the contact effect of air and aerobic bacteria.

[0061] The implementation principle of the rural sewage harmless treatment circulating system in Embodiment 1 is that: the sewage is sequentially treated in a series mode by the system including the primary sedimentation chamber 1, the anaerobic chamber 2, the aerobic chamber 3 and the secondary sedimentation chamber 4, and then is directly discharged, so that the sewage discharged by the rural area can be recycled. The restoring force of the elastic member 66 can timely drive the anti-blocking block 65 to block the aeration hole 631 when the aeration tank 6 is not working, reducing the blocking of the aeration hole 631, thereby reducing the later maintenance cost. The spiral blade 72 cooperates with the enclosing cylinder 73, so that the suspended filler 31 can circulate in the aerobic chamber 3, improving the contact effect of the suspended filler 31, the sewage and the air.

[0062] Embodiment 2:

[0063] Embodiment 2 of the present application discloses a research method of a rural sewage harmless treatment circulating system, and establishes the rural sewage harmless treatment circulating system as in Embodiment 1, and analyzes and researches the system operation, including the following steps:

[0064] S1: analyze the current situation, analyze and summarize the research and application of low-cost sewage treatment at home and abroad, and theoretically analyze the sewage treatment site of the actual project construction, summarize the sewage discharge characteristics and treatment status, and summarize the key technical problems;

[0065] S2: design a detection scheme, study the corresponding processing technology for the summarized key technical problems, set the structure of the sewage treatment equipment, set the number or position of the primary sedimentation chamber 1, the anaerobic chamber 2, the aerobic chamber 3 or the secondary sedimentation chamber 4 according to the on-site construction condition, inoculate sludge in the anaerobic chamber 2 and the aerobic chamber 3 before the start of the project test, study the influencing factors such as the dissolved oxygen in the anaerobic chamber 2 and the aerobic chamber 3 and the reflux in the system, and finally optimize and form the equipment operation scheme;

[0066] S3: test and calculate, test and run the rural sewage harmless treatment circulating system under the prepared operation control parameters, after the system runs, observe the system running condition on site, and measure the data of the effluent of the primary sedimentation chamber 1, the anaerobic chamber 2, the aerobic chamber 3 and the secondary sedimentation chamber 4, the data mainly includes the statistical and calculated parameter data of COD, ammonia oxygen content in water, SS, BOD and other parameters, and the system operation cost is also calculated, if the test data or operation cost calculation result is not ideal, the detection scheme is redesigned;

[0067] S4: construction of pilot, if the test data or operation cost calculation result is ideal, expand the pilot construction, and continue the pilot practice in the pilot project;

[0068] S5: result evaluation, summarize the pilot operation condition, and evaluate the result.

[0069] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rural sewage harmless treatment and recycling system, characterized in that: include A primary sedimentation chamber (1) is connected to a primary sedimentation inlet pipe (11) on one side and a primary sedimentation outlet pipe (12) on the other side. A filter layer is provided inside the primary sedimentation chamber (1). Anaerobic chamber (2), the anaerobic chamber (2) is connected to the primary sedimentation effluent pipe (12), the anaerobic chamber (2) is connected to an anaerobic effluent pipe (21) on one side, and a three-dimensional mesh packing is provided in the anaerobic chamber (2); The aerobic chamber (3) is connected to the anaerobic effluent pipe (21). An aerobic effluent pipe (33) is connected to one side of the aerobic chamber (3). Suspended packing material (31) is installed inside the aerobic chamber (3). Secondary sedimentation chamber (4), which is connected to aerobic outlet pipe (33), and a drain pipe (42) is connected to one side of the secondary sedimentation chamber (4). A filter layer is provided inside the secondary sedimentation chamber (4). The aerobic chamber (3) has a hollow aeration box (6) at its bottom. The aeration box (6) has a through hole (61) at its bottom and an air inlet pipe (62) inserted inside. One end of the air inlet pipe (62) passes through the aerobic chamber (3) and is used to connect to the air supply equipment. The aeration box (6) has a partition (63) inside. The partition (63) is located below the opening of the air inlet pipe (62) and is sealed to the inner wall of the aeration box (6). The partition (63) has multiple aeration holes (631) through it. The partition (63) slides downwards. An anti-clogging block (65) is connected to the aeration hole (631) one by one. The anti-clogging block (65) can open or close the aeration hole (631) during the sliding process. The aeration box (6) is also provided with a driving component for driving the anti-clogging block (65) to slide. The driving component includes a mounting bracket (64) and an elastic element (66). The side wall of the mounting bracket (64) abuts against the inner wall of the aeration box (6) and is slidably connected in the aeration box (6). The elastic element (66) is provided between the mounting bracket (64) and the partition (631). 3) and connected at both ends to the mounting frame (64) and the partition (63) respectively. The anti-blocking block (65) is fixed to the mounting frame (64) on the side near the partition (63); the top of the aerobic chamber (3) is equipped with a fixed frame (7), and the bottom of the fixed frame (7) is rotatably connected to a vertical rotating shaft (71). The side wall of the rotating shaft (71) is provided with a spiral blade (72). The spiral blade (72) extends spirally downward along the outer wall of the rotating shaft (71). The side wall of the rotating shaft (71) is coaxially fitted with a surrounding tube (73). 73) Surrounding the spiral blade (72) and rotating with the shaft (71), the top surface of the casing (73) is lower than the top of the spiral blade (72). In the horizontal direction, the distance between the spiral blade (72) and the inner wall of the casing (73) is less than the outer diameter of the suspended packing (31). The three-dimensional mesh packing and the suspended packing (31) are both made of waste plastic shavings, waste iron shavings, loofah, and polyurethane materials. The casing (73) has multiple water passage holes (731) through it, and the water passage holes (731) are opened in the horizontal direction.

2. The rural sewage harmless treatment and recycling system according to claim 1, characterized in that: The anti-blocking block (65) has a first conical surface (651) at one end near the partition (63), with the tip of the first conical surface (651) facing the partition (63).

3. The rural sewage harmless treatment and recycling system according to claim 1, characterized in that: The rotating shaft (71) is coaxially fitted with a baffle (75) below the casing (73). The baffle (75) has a plurality of second conical surfaces (751) spaced apart on one side away from the casing (73), and the tips of the second conical surfaces (751) face away from the casing (73).

4. The rural sewage harmless treatment and recycling system according to claim 3, characterized in that: The baffle (75) is arc-shaped, and the arc-shaped opening of the baffle (75) faces the surrounding cylinder (73).

5. A rural sewage harmless treatment and recycling system according to claim 1, characterized in that: Both the anaerobic chamber (2) and the aerobic chamber (3) are inoculated with activated sludge.

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