Integrated sewage treatment station and sewage treatment process

Abstract

The invention provides an integrated sewage treatment station and a sewage treatment process, and belongs to the technical field of sewage treatment.The integrated sewage treatment station comprises an adjusting tank, a sludge tank, an anaerobic tank, an anoxic tank, an aerobic tank, a sludge sedimentation tank, a flocculation reaction tank, a flocculation sedimentation tank, a clean water tank, a filtering device and ultraviolet disinfection equipment, the combined packing comprises a plurality of mounting racks capable of sliding in the horizontal direction, and a frame is rotationally assembled on the mounting racks; according to the integrated sewage treatment station, rural sewage treatment can be well achieved, the pollutant removal effect is good, the effluent quality is stable, the operation cost is saved by 20% or above compared with that of traditional integrated sewage treatment equipment, and reference and technical support are provided for rural water environment water quality improvement and pollution load emission reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to an integrated sewage treatment station and a sewage treatment process. Background Art

[0002] With the development of economy, rural environmental problems are becoming more and more prominent. The first urgent step for rural environmental governance is to treat rural domestic sewage. For a long time, due to the difference in the level of ecological environment governance facilities between urban and rural areas, the quality of ecological environment has been different. Sewage treatment is still a weak link, which has brought great challenges to the construction of beautiful new countryside.

[0003] Rural water pollution is a typical non-point source pollution, and its pollution sources are scattered and difficult to treat; rainwater scouring brings pollutants from the atmosphere and the surface into the receiving water body, causing water pollution; villages in my country are generally distributed along rivers, and pollutants in the water will threaten human health. Therefore, rural pollutants have a great impact on the basin ecology and residents' health. Compared with urban sewage, China's rural sewage treatment has certain similarities, but due to the unique customs and lifestyles in rural areas, rural water pollution has its own distinctive characteristics. Therefore, the selection of rural domestic sewage treatment technology should be based on the current situation, natural characteristics, customs and social and economic conditions of rural areas, and adopt a diversified sewage treatment model with low investment, high pollutant removal effect, and convenient management and operation, and cannot be unilaterally copied from large-scale urban sewage treatment processes.

[0004] The main way to treat urban domestic sewage is to collect it through the municipal pipeline network and then transport it to the sewage treatment plant for centralized treatment. If a traditional centralized sewage treatment system is established in rural areas, it requires huge capital investment and long-term planning. The decentralized integrated sewage treatment equipment can effectively save a lot of pipeline laying, with low investment per ton of water and very little operating costs. At the same time, it can maintain the relative ecological balance of the surrounding environment of rural areas. It is an economical and effective treatment method.

[0005] Rural domestic sewage includes sewage from the seat of town governments and villages. Rural domestic sewage mainly includes domestic sewage, catering wastewater, small food processing wastewater, etc. Due to differences in rural economic industrial structure, geographical regions, climate characteristics, etc., the concentration of pollutants in sewage varies greatly. Compared with urban sewage, rural sewage has the following characteristics: 1. Small amount of sewage and large fluctuations in water quality Most rural domestic sewage has a high daily variation coefficient. Domestic sewage discharge is usually high in the morning, noon and evening, and the discharge volume gradually decreases after the evening, and even stops at night. Rural sewage pollutants are complex, and the main pollutants include organic matter such as carbohydrates, proteins, amino acids, and fats, and generally do not contain toxic substances. The water quality has the characteristics of high N and P content, good biodegradability, and low content of toxic and harmful substances such as difficult-to-degrade organic matter and heavy metals.

[0006] 2. Dispersed emission areas and difficult collection The rural population density is small, the residence is relatively scattered, the sewage discharge pipeline facilities are not perfect, and the some rural sewage pipes are mainly combined rainwater and sewage. In addition, the complex terrain and environment in some rural areas increase the difficulty of sewage collection.

[0007] 3. Small scale of sewage treatment in individual villages At present, the scale of village-level sewage treatment plants is generally 10~300 m 3 / d, the scale of town-level sewage treatment plants is generally 50~1000m 3 / d, which is far from the scale of urban sewage treatment. Compared with rural sewage, rural sewage treatment problems are complex and diverse, and there are many differences from urban sewage treatment. The urban sewage treatment model cannot be simply copied.

[0008] At present, the commonly used processes for rural sewage treatment include biotrickling filtration process, integrated MBR process and activated sludge + biofilm composite process. Among them, the activated sludge + biofilm composite process (hereinafter referred to as biofilm method) has the advantages of resistance to water quality fluctuations, strong denitrification efficiency, large amount of microorganisms per unit reactor volume, rich types of microorganisms in the biofilm, and less residual sludge. Therefore, it is more suitable for application in rural sewage treatment.

[0009] In the biofilm method, the structure and performance of the filler directly affect the entire process of biofilm growth, reproduction, renewal, aging and shedding, which in turn affects the treatment effect of sewage. After comprehensive comparison and analysis, it was determined to use fixed fillers. Specifically, the fiber bundle filler is wound and fixed on the frame. A large number of microorganisms can be fixed in the three-dimensional space of the filler, forming a suitable environment for the coexistence of various microorganisms, which can achieve good treatment results.

[0010] After the steps of testing, recording, debugging and verification, a better sewage treatment effect was achieved and the feasibility of the above scheme was confirmed.

[0011] However, we found some new problems in the experiment. Compared with traditional sewage treatment plants, integrated sewage treatment equipment is relatively small in size, with advantages such as convenient transportation and reduced floor space, but correspondingly, integrated sewage treatment equipment also has some problems.

[0012] Fixed fillers can accommodate more microorganisms, but they require frames. The height of the frame corresponds to the depth of the anoxic pool or aerobic pool, which is generally about two meters, and some are even higher. Although the service life of fiber bundle fillers is relatively longer, it is also necessary to replace the previous fiber bundle fillers after the service life is reached or after a better fiber bundle filler is developed. Especially in the research and development and debugging stage, the fiber bundle fillers are replaced relatively more frequently. The narrow space in the anoxic pool and aerobic pool makes it difficult to set up equipment such as escalators. It is very difficult for the staff to tie and replace the fiber bundle fillers, especially at the top of the frame. Poor tying may also affect the attachment of microorganisms. In addition, the large number of frames causes the entire operation to take a long time, and the environment of the anoxic pool and aerobic pool is poor, and the staff need to work in this environment for a long time. Summary of the invention

[0013] The present invention provides an integrated sewage treatment station and sewage treatment process to solve the technical problem of difficulty in replacing fiber bundle fillers in the prior art.

[0014] In order to solve the above problems, the integrated sewage treatment plant provided by the present invention adopts the following technical solutions: It includes a regulating tank, which is connected to the external drainage network and is used to receive domestic wastewater. A submersible lifting pump is installed in the regulating tank; Sludge tank, which is used to store sludge sediment; Anaerobic tanks, which are used to degrade organic matter in sewage by anaerobic microorganisms; Anoxic tanks, which are used to remove nitrogen from sewage; Aerobic tanks, which are used to degrade organic matter in sewage by aerobic microorganisms; A sludge sedimentation tank, which is used to allow sludge particles to settle to the bottom of the sludge sedimentation tank by gravity; Flocculation reaction tank, which is used for the flocculant to react with sewage to aggregate the fine suspended particles in the sewage to form flocs; Flocculation sedimentation tank, which is used to separate flocs from sewage by gravity sedimentation to further remove suspended matter in sewage; A clear water tank, which is used to store clear water after being precipitated in the flocculation sedimentation tank; A filtering device for filtering clean water; Ultraviolet disinfection equipment, which is used to disinfect the filtered water; The anoxic pool and the aerobic pool are both provided with composite fillers, which include a plurality of mounting frames that can slide in the horizontal direction, on which frames are rotatably mounted, so that the frames can rotate around the rotating shaft, and fiber bundle fillers are wound on the frames.

[0015] By adopting the above technical solution, rural sewage purification can be better completed, while the difficulty of replacing fiber bundle fillers is greatly reduced, and convenience and practicality are improved.

[0016] The existing frame is currently fixed in the anoxic tank or aerobic tank. Since the frame is relatively high, it is difficult for workers to replace the fiber bundle filler, which wastes time. Due to size limitations, it is difficult to reserve space for ladders and other equipment in each treatment tank of the integrated sewage treatment equipment; if the frame is disassembled and then replaced, the workload will be relatively greater. The present invention provides a rotatable frame. When replacing the fiber bundle, the frame is rotated to lower the height of the top of the frame, which greatly reduces the difficulty of replacing the fiber bundle filler, improves convenience and safety, and reduces the working time of workers in harsh environments.

[0017] In addition, since the frames on both sides are close to the side walls of the tank body, the rotation angle of the frames is limited. Therefore, the present invention provides a slidable mounting frame, and when replacing the fiber bundle filler, the originally scattered frames are gathered in the middle position by sliding the mounting frame, leaving space for the frames to rotate.

[0018] As a further improvement, the mounting frame is concave in shape, and the moving direction of the mounting frame is defined as left and right. Sliders are fixedly installed at both ends of the mounting frame, and a slide rail cooperating with the slide rail is provided under the mounting frame. A support leg for supporting the slide rail is also provided at the bottom of the slide rail.

[0019] The concave mounting frame can better fit the frame, and there is friction between the slider and the slide rail. When the external force is relatively small, the slider will not deviate. The purpose of the legs is to support the slide rail, which can reduce the sludge deposition in the slide rail on the one hand, and avoid the perforated pipe on the other hand.

[0020] As a further improvement, a cooperative shaft is provided on the front side or the rear side of the frame.

[0021] By adopting the above technical solution, multiple frames can be rotated synchronously. The cooperative shaft is a cylindrical protrusion. When the frames are concentrated, the external connecting strip is inserted from the side. The connecting strip has the same number of circular holes as the cooperative shaft, and the diameter of the cooperative shaft is the same as the diameter of the circular hole. When the connecting strip is inserted into the cooperative shaft, the cooperative shaft and the connecting strip are connected in rotation. At this time, if one frame is rotated, the other frames will rotate synchronously.

[0022] As a further improvement, a limit plate is fixedly mounted on the rotating shaft of the frame, a plurality of limit grooves are evenly distributed on the limit plate, and a limit pin cooperating with the limit plate is hinged on the mounting frame.

[0023] By adopting the above technical solution, the stability of the frame can be improved. The frame is fixed by the friction between the rotating shaft and the mounting frame, and generally no angle deviation will occur. However, occasionally due to the influence of the water flow, the angle of the frame may change. By setting a limit plate and a limit pin, the position of the frame can be better limited. In addition, when the frame is translated, it may also cause the frame to shift. At this time, when the connecting strip is installed, the cooperative axis may not correspond to the circular hole of the connecting strip, and the frame needs to be adjusted one by one. After setting the limit plate and the limit pin for limiting, it can ensure that the cooperative axis is accurately inserted into the corresponding circular hole.

[0024] As a further improvement, the frame is a diffuser pipe frame, a ventilation pipe is fixedly mounted on the mounting frame, and the ventilation pipe is rotatably connected to a rotating shaft of the diffuser pipe frame.

[0025] The diffuser frame is a frame composed of pipes with micropores. The rotating shaft of the diffuser frame is also a hollow structure, and a sealing ring is provided between the rotating shaft of the diffuser frame and the ventilation pipe, which is connected to the fan. The right amount of air is conducive to the growth of microorganisms and can achieve good treatment efficiency. Whether to introduce air and the amount of air introduced can be selected according to actual conditions.

[0026] As a further improvement, it also includes an aeration system, which includes a fan and an aeration branch pipe installed at the bottom of the aerobic tank, and a number of microporous aeration disks are evenly distributed on the aeration branch pipe. The anaerobic tank and the anoxic tank flocculation sedimentation tank are both provided with perforated pipes, and the perforated pipes and the aeration branch pipes are connected to the fan through pipelines.

[0027] The microporous aeration disk can make the exhausted air form fine bubbles, increase the contact area between air and water, and improve the oxygen utilization rate. The main function of the perforated pipe is to promote water flow and prevent sludge deposition.

[0028] As a further improvement, it also includes an air stripping stirring system, which includes a first stirring tube and a first air stripping tube arranged at the bottom of the aerobic tank, a second air stripping tube and a third air stripping tube are arranged in the sludge sedimentation tank, a fourth air stripping tube is arranged in the flocculation sedimentation tank, and a second stirring tube is arranged in the flocculation reaction tank, and the first stirring tube, the second stirring tube, the first air stripping tube, the second air stripping tube, the third air stripping tube and the fourth air stripping tube are all connected to a diaphragm air pump; The first gas lift pipe is connected to a nitrification liquid return pipe, the other end of which extends to the anaerobic tank, the second gas lift pipe is connected to a sludge return pipe, the other end of which extends to the anaerobic tank, the third gas lift pipe is connected to a first residual sludge pipe, the other end of which extends to the sludge tank, the fourth gas lift pipe is connected to a second residual sludge pipe, the other end of which extends to the sludge tank; The fan and the diaphragm air pump are both electrically connected to the frequency converter.

[0029] The air lift mixing system is mainly used for water mixing and sewage return.

[0030] In view of the problem that water consumption in rural areas is relatively small and the amount of sewage generated in different time periods varies greatly, fans and diaphragm air pumps are connected to frequency conversion equipment. During periods of low water consumption, the power of electrical equipment such as fans and diaphragm air pumps is reduced to reduce power consumption; conversely, the power of electrical equipment such as fans and diaphragm air pumps is increased, thereby reducing operating costs.

[0031] As a further improvement, the anoxic tank is connected to a carbon source adding device for adding a carbon source, and the flocculation reaction tank is connected to a dosing device for adding a flocculant.

[0032] Carbon sources are added to the anoxic tank to improve denitrification efficiency and maintain microbial activity.

[0033] The present invention also provides an integrated sewage treatment process, using the above-mentioned integrated sewage treatment station, comprising the following steps: S1, sewage collection, sewage is filtered through artificial grids and then discharged into the regulating tank; S2. Decomposition of organic matter in sewage. After sewage is discharged from the regulating tank into the anaerobic tank, the organic matter in the sewage is degraded by anaerobic microorganisms in the anaerobic tank; S3, sewage nitrogen removal, after the sewage is discharged from the anaerobic tank into the anoxic tank, a carbon source is added to the anoxic tank to remove nitrogen from the sewage through denitrification; S4. Removal of organic matter and ammonia nitrogen pollutants from sewage. After sewage is discharged from the anoxic tank into the aerobic tank, aerobic bacteria degrade the organic matter and ammonia nitrogen pollutants in the sewage. S5, initial sedimentation, sewage is discharged from the aerobic tank into the sludge sedimentation tank, the sludge falls to the bottom of the sludge sedimentation tank due to gravity sedimentation, the bottom of the sludge sedimentation tank is a cone structure, which accelerates the sludge sedimentation and concentrates the sludge, and the precipitated sludge is discharged into the anaerobic tank again through the sludge return pipe; S6, flocculation reaction, after the sewage is initially precipitated, the supernatant is discharged into the flocculation reaction tank, flocculant is added to the flocculation reaction tank through the dosing device, and stirred through the second stirring tube to allow the flocculant to fully react with the sewage; S7, flocculation and sedimentation, the sewage mixed with the flocculant is discharged into the flocculation and sedimentation tank for re-precipitation, the precipitated sludge is discharged into the sludge tank through the second residual sludge pipe, and the supernatant after precipitation is discharged into the clear water tank; S8. Filtration and disinfection: the supernatant in the clear water tank is discharged after filtration and disinfection.

[0034] By adopting the above-mentioned sewage treatment process, rural sewage treatment can be better achieved, the pollutant removal effect is good and the effluent water quality is stable, which provides a certain technical reference for rural domestic sewage treatment.

[0035] As a further improvement, when replacing the fiber bundle filler, the mounting frame is moved closer to the middle of the slide rail, leaving a gap between the frame and the side wall of the anoxic pool or the side wall of the aerobic pool for the frame to rotate, thereby lowering the height of the top of the frame to facilitate replacement of the fiber bundle filler.

[0036] By adopting the above-mentioned sewage treatment process, the difficulty of replacing the fiber bundle filler is reduced without increasing too much cost, the difficulty of replacing the fiber bundle is reduced, the staff is avoided from working in the pool for a long time, and the working environment of the staff is indirectly improved.

[0037] The beneficial effects of the above technical solution of the present invention are as follows: 1. The present invention uses fiber bundle fillers as microorganism attachment carriers. The fiber bundle fillers are relatively low in cost and have a long service life, which is conducive to the use of the present invention in rural areas. The fiber bundle fillers can fix a large number of microorganisms in the three-dimensional space of the fillers, forming a suitable environment for the coexistence of various microorganisms, and can achieve good treatment results.

[0038] The biofiber bundle filler is in the shape of a rope, so the shape can be freely selected and changed during installation. By shaking it in the wastewater, it can not only absorb the dissolved oxygen in the water, but also increase the contact efficiency with the water.

[0039] 2. The present invention lowers the height of the frame by rotating, which makes it convenient for workers to replace the fiber bundle filler, greatly reduces the difficulty of replacing the fiber bundle filler, improves convenience and safety, and reduces the working time of workers in harsh environments.

[0040] 3. The integrated sewage treatment station of the present invention can effectively treat rural sewage, has a good effect on pollutant removal and stable effluent water quality, and saves more than 20% of operating costs compared with traditional integrated sewage treatment equipment, providing reference and technical support for improving rural water environment water quality and reducing pollution load. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 It is a structural schematic diagram of the integrated sewage treatment station of the present invention; Figure 2 This is a plan layout diagram of the integrated sewage treatment station of the present invention; Figure 3 This is a layout diagram of the air duct of the integrated sewage treatment station of the present invention; Figure 4It is a layout diagram of the sewage pipes of the integrated sewage treatment station of the present invention; Figure 5 for Figure 2 AA section view; Figure 6 for Figure 2 BB cross-sectional view; Figure 7 for Figure 2 CC section view; Figure 8 It is an axonometric diagram of the aeration system of the integrated sewage treatment plant of the present invention; Fig. 9 It is an axonometric diagram of the air lift stirring system of the integrated sewage treatment station of the present invention; Fig.10 It is a schematic diagram of the structure of the perforated pipe of the integrated sewage treatment station of the present invention; Fig.11 It is a structural schematic diagram of the combined filler of the integrated sewage treatment station of the present invention; Fig.12 It is a structural schematic diagram of Example 2 of the integrated sewage treatment station of the present invention; Fig.13 It is a structural schematic diagram of Example 3 of the integrated sewage treatment station of the present invention; Fig.14 for Fig.13 A magnified view of part I; Fig.15 It is a structural schematic diagram of Example 4 of the integrated sewage treatment station of the present invention.

[0042] Description of reference numerals: 1. Regulating tank; 2. Sludge tank; 3. Valve well; 4. Inspection well; 5. Carbon source dosing device; 6. Fan; 7. Anaerobic tank; 8. Anoxic tank; 9. Aerobic tank; 901. Nitration liquid return pipe; 10. Sludge sedimentation tank; 1001. Scum baffle; 1002. Slag discharge chute; 1003. Sludge return pipe; 1004. First residual sludge pipe; 1005. Diversion pipe; 1006. Central water distribution pipe; 11. Diaphragm air pump; 12. Dosing device; 13. Flocculation reaction tank; 14. Flocculation sedimentation tank; 1401. Second residual sludge pipe; 1402. Inclined tube filler; 15. Clean water tank; 1501. Clean water pump; 1502. Disinfection device; 15 03. Overrunning pipe; 16. Filtering device; 17. Ultraviolet disinfection equipment; 18. Aeration system; 1801. Perforated pipe; 1802. Aeration branch pipe; 1803. Microporous aeration disk; 19. Air lift stirring system; 1901. First stirring tube; 1902. First air lift tube; 1903. Second air lift tube; 1904. Third air lift tube; 1905. Fourth air lift tube; 1906. Second stirring tube; 20. Combined filler; 2001. Support leg; 2002. Slide rail; 2003. Slider; 2004. Mounting frame; 2005. Frame; 2006. Coordinating shaft; 2007. Limit pin; 2008. Limit disk; 2009. Ventilation pipe. DETAILED DESCRIPTION

[0043] 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. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0044] In the existing technology, the biofilm method was finally selected to treat rural sewage in view of the characteristics of rural sewage. However, in the specific implementation, since the frame for fixing the fiber bundle filler is relatively high, it is very difficult for the workers to tie and replace the fiber bundle filler, and there are many frames, which makes the whole operation time-consuming and the workers need to work in harsh environments for a long time.

[0045] In view of the above problems, the present invention designs a new combined packing structure. By providing a rotatable frame, when replacing the fiber bundle, the frame is rotated to lower the height of the top of the frame, which greatly reduces the difficulty of replacing the fiber bundle packing. In addition, a slidable mounting frame is provided. When replacing the fiber bundle packing, the originally scattered frames are gathered in the middle position by sliding the mounting frame, leaving space for the frame to rotate.

[0046] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0047] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0048] Embodiment 1 of the integrated sewage treatment plant provided by the present invention: like Figure 1-Figure 11 As shown, the integrated sewage treatment station includes a regulating tank 1, a sludge tank 2, an anaerobic tank 7, an anoxic tank 7, an anoxic tank 8, an aerobic tank 9, a sludge sedimentation tank 10, a flocculation reaction tank 13, a flocculation sedimentation tank 14, a clear water tank 15, a filtration device 16, an ultraviolet disinfection equipment 17, an aeration system 18, an air lift mixing system 19, a valve well 3 and an inspection well 4.

[0049] like Figure 1 As shown, the regulating tank 1 is connected to the external drainage network. The regulating tank 1 is used to receive domestic wastewater. An artificial grid is provided at the water inlet of the regulating tank 1 to preliminarily filter the sewage to prevent foreign matter from entering the regulating tank 1. The regulating tank 1 is provided with a liquid level gauge. A submersible lifting pump is also installed in the regulating tank 1. The submersible lifting pump is used to discharge the sewage into the anaerobic tank 7. There are two submersible lifting pumps, one for use and one for backup. When the submersible lifting pump fails, the backup submersible lifting pump is started to avoid the problem that the staff cannot arrive in time and cause the integrated sewage treatment station to fail to operate normally. The following key equipment such as the fan 6 and the diaphragm air pump 11 are all two sets.

[0050] Sludge pool 2 is used to store sludge sediments. The transfer vehicle regularly cleans the sludge sediments in sludge pool 2. Sludge pool 2 is adjacent to regulating pool 1. An overflow hole is reserved between sludge pool 2 and regulating pool 1. After the supernatant in sludge pool 2 reaches the set height, it overflows to regulating pool 1 for recycling.

[0051] like Figure 2-Figure 4 As shown, the anaerobic tank 7 is used to degrade organic matter in sewage by anaerobic microorganisms.

[0052] The anoxic tank 8 is used to remove nitrogen from sewage. The anoxic tank 8 is connected to a carbon source adding device 5. The anoxic tank 8 adds carbon source to improve denitrification efficiency and maintain microbial activity.

[0053] The aerobic tank 9 is used to degrade organic matter in the sewage by aerobic microorganisms.

[0054] like Fig.11As shown, in this embodiment, both the anoxic tank 8 and the aerobic tank 9 are provided with a composite filler 20, and the composite filler 20 includes two slide rails 2002 installed at the bottom of the tank body, and the bottom of the slide rails 2002 is also provided with a support leg 2001 for supporting the slide rails 2002, and the support leg 2001 is used to hold up the slide rails 2002, so that on the one hand, sludge deposition in the slide rails 2002 can be reduced, and on the other hand, the perforated pipe 1801 can be avoided to facilitate pipeline arrangement; a concave-shaped mounting frame 2004 is provided between the slide rails 2002, and the mounting frame 2004 is slidably connected to the slide rails 2002 through a slider 2003. In this embodiment, the mounting frame 2004 is fixed by the friction between the slider 2003 and the slide rail 2002. In other embodiments, a locking structure such as a bolt can also be added to limit and fix the slider 2003; a frame 2005 is rotatably mounted on the mounting frame 2004, so that the frame 2005 can rotate around the rotation axis, and a fiber bundle filler is wound on the frame 2005.

[0055] When replacing the fiber bundle, the frame 2005 is rotated to lower the height of the top of the frame 2005, which greatly reduces the difficulty of replacing the fiber bundle filler, improves convenience and safety, and reduces the working time of the staff in harsh environments.

[0056] In addition, since the frames 2005 on both sides are close to the side walls of the tank body, the rotation angle of the frames 2005 is limited. Therefore, the present invention provides a slidable mounting frame 2004, and when the fiber bundle filler is replaced, the originally scattered frames 2005 are gathered in the middle position by sliding the mounting frame 2004, and a space for the frames 2005 to rotate is reserved.

[0057] In this embodiment, the fiber bundle filler is made of polypropylene fiber filaments. Polypropylene fiber has good chemical stability, corrosion resistance, acid and alkali stability, high strength, good elasticity, can completely restore its shape when stretched, good stability, and is mostly light-colored and colored wool. This embodiment uses white fiber bundle filler, which can increase the contrast with the biofilm and facilitate observation. The fiber filament diameter is 20~50 μm, the porosity is 96%~97%, and the specific surface area is 5370 m2 / m3. It has the advantages of good elasticity, large porosity, low price, and good chemical corrosion resistance.

[0058] In this embodiment, non-woven fabric fillers are also mixed. The non-woven fabric fillers are fiber products made of polymer slices, short fibers or filaments through various fiber mesh forming methods and consolidation technologies. The surface of non-woven fabric is rough, which is conducive to the attachment of microorganisms. Non-woven fabrics are cheap and easy to obtain. Recycled non-woven fabrics can also be used. In addition, non-woven fabrics have strong corrosion resistance and outstanding filtering performance. The non-woven fabric filler selected in this embodiment has a specific surface area of ​​≥4000 m2 / m3 and an average material mass of (400±20) g / m2.

[0059] The sludge sedimentation tank 10 is used to settle the sludge particles to the bottom of the sludge sedimentation tank 10 through gravity sedimentation. The bottom of the sludge sedimentation tank 10 and the bottom of the flocculation sedimentation tank 14 are both conical structures, and multiple conical structures can be provided to further accelerate sewage sedimentation and aggregation.

[0060] The sludge settling tank 10 is also provided with a flow guide pipe 1005 connected to the aerobic tank 9, and the other end of the flow guide pipe 1005 is connected to the central water distribution pipe 1006. In addition, the sludge settling tank 10 is also provided with a scum baffle 1001 for scum removal and a scum discharge trough 1002 for discharging scum.

[0061] The flocculation reaction tank 13 is used for the flocculant to react with the sewage to aggregate the fine suspended particles in the sewage to form flocs; The flocculation sedimentation tank 14 is used to separate flocs from sewage by gravity sedimentation to further remove suspended matter in the sewage. The flocculation sedimentation tank 14 is also equipped with an inclined tube filler 1402 to increase the contact area and accelerate sludge sedimentation.

[0062] The clean water tank 15 is used to store the clean water after being precipitated in the flocculation sedimentation tank 14; a clean water pump 1501 and a disinfection device 1502 are installed in the clean water tank 15, the clean water pump 1501 is used to extract clean water, and the disinfection device 1502 can be a gas disinfection device 1502 or a chemical disinfection device 1502, which can be adjusted according to actual conditions; an overflow pipe 1503 is provided at the upper end of the clean water tank 15. When an unexpected situation occurs and causes the water level in the clean water tank 15 to exceed the overflow pipe 1503, the clean water can be temporarily discharged from the overflow pipe 1503.

[0063] The filter device 16 is used to filter clean water; the backwash drainage hole of the filter device 16 is connected to the sludge pool 2, so that the backwash water of the filter device 16 is directly discharged into the sludge pool 2 for reuse.

[0064] The ultraviolet disinfection equipment 17 is used to disinfect the filtered clean water; after the filtered clean water is disinfected twice by the ultraviolet disinfection equipment 17, it can be discharged when it meets the discharge standard.

[0065] like Figure 3 and Figure 8 As shown, the aeration system 18 includes a fan 6 and an aeration branch pipe 1802 installed at the bottom of the aerobic tank 9, and a plurality of microporous aeration disks 1803 are evenly distributed on the aeration branch pipe 1802. The anaerobic tank 7 and the anoxic tank 8 flocculation sedimentation tank 14 are both provided with perforated pipes 1801, and the perforated pipes 1801 and the aeration branch pipe 1802 are both connected to the fan 6 through pipes. Fig.10 As shown, in this embodiment, the perforated pipe 1801 has two rows of openings, and the openings of the perforated pipe 1801 are tilted downward, which can better turn over the sludge at the bottom of the pool.

[0066] The microporous aeration disk 1803 can make the exhausted air form fine bubbles, increase the contact area between air and water, and improve the oxygen utilization rate. The main function of the perforated pipe 1801 is to promote the flow of water and prevent sludge deposition.

[0067] It should be noted that the pipelines of the aeration system 18 and the pipelines of the airlift mixing system 19 are provided with corresponding valves, and the valves are located in the valve well 3, which is convenient for unified maintenance and control. Since the number of valves is relatively large and the valve settings are conventional technical means in this field, they will not be repeated here. The present invention is mainly distributed in various rural areas and requires remote control, so the valves in this embodiment are all electromagnetic valves. In addition, considering the possibility of unexpected situations, each solenoid valve is also connected in series with a corresponding manual valve to facilitate closing the pipeline in an emergency.

[0068] like Figure 4 , 5 , 6, 7, and 9, the air stripping stirring system 19 includes a first stirring pipe 1901 and a first air stripping pipe 1902 arranged at the bottom of the aerobic tank 9, a second air stripping pipe 1903 and a third air stripping pipe 1904 are arranged in the sludge sedimentation tank 10, a fourth air stripping pipe 1905 is arranged in the flocculation sedimentation tank 14, and a second stirring pipe 1906 is arranged in the flocculation reaction tank 13. The first stirring pipe 1901, the second stirring pipe 1906, the first air stripping pipe 1902, the second air stripping pipe 1903, the third air stripping pipe 1904, and the fourth air stripping pipe 1905 are all connected to the diaphragm air pump 11; The first gas lift pipe 1902 is connected to the nitrification liquid return pipe 901, and the other end of the nitrification liquid return pipe 901 extends to the anaerobic tank 7. The second gas lift pipe 1903 is connected to the sludge return pipe 1003, and the other end of the sludge return pipe 1003 extends to the anaerobic tank 7. The third gas lift pipe 1904 is connected to the first residual sludge pipe 1004, and the other end of the first residual sludge pipe 1004 extends to the sludge tank 2. The fourth gas lift pipe 1905 is connected to the second residual sludge pipe 1401, and the other end of the second residual sludge pipe 1401 extends to the sludge tank 2. The fan 6 and the diaphragm air pump 11 are both electrically connected to the frequency converter.

[0069] The air lift stirring system 19 is mainly used for water stirring and sewage return.

[0070] In view of the problem that water consumption in rural areas is relatively small and the amount of sewage generated in different time periods varies greatly, the fan 6 and the diaphragm air pump 11 are connected to frequency conversion equipment. During periods of low water consumption, the power of electrical equipment such as the fan 6 and the diaphragm air pump 11 is reduced to reduce power consumption; conversely, the power of electrical equipment such as the fan 6 and the diaphragm air pump 11 is increased, thereby reducing operating costs.

[0071] The present invention also provides an integrated sewage treatment process, using the above-mentioned integrated sewage treatment station, comprising the following steps: S1, sewage collection, sewage is filtered through artificial grids and then discharged into regulating tank 1; S2, decomposition of organic matter in sewage. After the sewage is discharged from the regulating tank 1 into the anaerobic tank 7, the organic matter in the sewage is degraded by anaerobic microorganisms in the anaerobic tank 7; S3, sewage nitrogen removal, after the sewage is discharged from the anaerobic tank 7 into the anoxic tank 8, a carbon source is added to the anoxic tank 8 to remove nitrogen in the sewage through denitrification; S4, removal of organic matter and ammonia nitrogen pollutants from sewage. After the sewage is discharged from the anoxic tank 8 into the aerobic tank 9, aerobic bacteria degrade the organic matter and ammonia nitrogen pollutants in the sewage; S5, preliminary sedimentation, sewage is discharged from the aerobic tank 9 into the sludge sedimentation tank 10, the sludge falls to the bottom of the sludge sedimentation tank 10 due to gravity sedimentation, the bottom of the sludge sedimentation tank 10 is a conical structure, which accelerates the sludge sedimentation and concentrates the sludge, and the precipitated sludge is discharged into the anaerobic tank 7 again through the sludge return pipe 1003; S6, flocculation reaction, after the sewage is initially precipitated, the supernatant is discharged into the flocculation reaction tank 13, flocculant is added to the flocculation reaction tank 13 through the dosing device 12, and stirred through the second stirring tube 1906 to allow the flocculant to fully react with the sewage; S7, flocculation and sedimentation, the sewage mixed with the flocculant is discharged into the flocculation and sedimentation tank 14 for re-precipitation, the precipitated sludge is discharged into the sludge tank 2 through the second residual sludge pipe 1401, and the supernatant after precipitation is discharged into the clear water tank 15; S8, filtering and disinfecting: the supernatant in the clear water tank 15 is discharged after filtering and disinfection.

[0072] When replacing the fiber bundle filler, the mounting frame 2004 is moved to move the mounting frame 2004 toward the middle of the slide rail 2002, so that the frame 2005 and the side wall of the anoxic pool 8 or the side wall of the aerobic pool 9 reserve a gap for the frame 2005 to rotate, and the height of the top of the frame 2005 is lowered to facilitate the replacement of the fiber bundle filler. This avoids the staff from working in the pool for a long time, and indirectly improves the working environment of the staff.

[0073] Embodiment 2 of the integrated sewage treatment plant provided by the present invention: The main difference between it and Example 1 is: like Fig.12 As shown, in this embodiment, a cooperating shaft 2006 is provided on the front or rear side of the frame 2005 .

[0074] The multiple frames 2005 can be rotated synchronously through the coordination shaft 2006. The coordination shaft 2006 is a cylindrical protrusion. When the frames 2005 are concentrated, the external connecting strip is inserted from the side. The connecting strip is provided with the same number of circular holes as the coordination shaft 2006, and the diameter of the coordination shaft 2006 is the same as the diameter of the circular holes. When the connecting strip is inserted into the coordination shaft 2006, the coordination shaft 2006 and the connecting strip are connected in rotation. At this time, when one frame 2005 is rotated, the other frames 2005 will rotate synchronously.

[0075] Embodiment 3 of the integrated sewage treatment plant provided by the present invention: The main difference between it and Example 2 is: like Fig.13 and Fig.14 As shown, in this embodiment, a limit plate 2008 is fixedly mounted on the rotating shaft of the frame 2005 , a plurality of limit grooves are evenly distributed on the limit plate 2008 , and a limit pin 2007 cooperating with the limit plate 2008 is hinged on the mounting frame 2004 .

[0076] The frame 2005 is fixed by the friction between the rotating shaft and the mounting frame 2004, and generally, there will be no angle deviation. However, occasionally, due to the influence of the water flow, the angle of the frame 2005 may change. By setting the limit plate 2008 and the limit pin 2007, the position of the frame 2005 can be better limited. In addition, when the frame 2005 is translated, it may also cause the frame 2005 to deviate. At this time, when the connecting strip is installed, the cooperative shaft 2006 may not correspond to the circular hole of the connecting strip, and the frame 2005 needs to be adjusted one by one. After the limit plate 2008 and the limit pin 2007 are set for limiting, it can ensure that the cooperative shaft 2006 is accurately inserted into the corresponding circular hole.

[0077] Embodiment 4 of the integrated sewage treatment plant provided by the present invention: The main difference between it and Example 3 is: like Fig.15 As shown, in this embodiment, the frame 2005 is a diffuser frame 2005 , and a ventilation pipe 2009 is fixedly mounted on the mounting frame 2004 , and the ventilation pipe 2009 is rotatably connected to the rotating shaft of the diffuser frame 2005 .

[0078] The diffuser frame 2005 is a frame 2005 composed of microporous pipes, the rotating shaft of the diffuser frame 2005 is also a hollow structure, and a sealing ring is provided between the rotating shaft of the diffuser frame 2005 and the ventilation pipe 2009, and the ventilation pipe 2009 is connected to the fan 6. A proper amount of air is conducive to the growth of microorganisms and can achieve good treatment efficiency. Whether to introduce air and the amount of air introduced can be selected according to actual conditions.

[0079] Although this specification has shown and described a plurality of embodiments of the present invention, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The attached claims are intended to define the scope of protection of the present invention, and therefore cover the modular composition, equivalent or alternatives within the scope of protection of these claims.

Claims

1. An integrated sewage treatment station, characterized in that: include: A regulating tank (1), the regulating tank (1) is connected to an external drainage network, the regulating tank (1) is used to receive domestic wastewater, and a submersible lifting pump is installed in the regulating tank (1); A sludge tank (2), the sludge tank (2) is used to store sludge sediment; An anaerobic tank (7) for degrading organic matter in sewage by anaerobic microorganisms; Anoxic tank (8), which is used to remove nitrogen from sewage; an aerobic tank (9) for degrading organic matter in sewage by aerobic microorganisms; A sludge sedimentation tank (10), which is used to allow sludge particles to settle to the bottom of the sludge sedimentation tank (10) through gravity sedimentation; A flocculation reaction tank (13) is used for the flocculant to react with the sewage so that the fine suspended particles in the sewage aggregate to form flocs; A flocculation sedimentation tank (14), which is used to separate flocs from sewage by gravity sedimentation to further remove suspended matter in the sewage; A clean water tank (15), which is used to store clean water after being precipitated in the flocculation sedimentation tank (14); A filtering device (16) for filtering clean water; Ultraviolet disinfection equipment (17), which is used to disinfect the filtered clean water; The anoxic pool (8) and the aerobic pool (9) are both provided with a composite filler (20), the composite filler (20) comprising a plurality of mounting frames (2004) which can slide in a horizontal direction, a frame (2005) being rotatably mounted on the mounting frames (2004) so ​​that the frame (2005) can rotate around a rotation axis, and a fiber bundle filler is wound around the frame (2005).

2. The integrated sewage treatment station according to claim 1, characterized in that: The mounting frame (2004) is in a concave shape, and the moving direction of the mounting frame (2004) is defined as the left-right direction. Slide blocks (2003) are fixedly installed at both the front and rear ends of the mounting frame (2004). A slide rail (2002) cooperating with the slide block (2003) is also provided below the mounting frame (2004). A support leg (2001) for supporting the slide rail (2002) is also provided at the bottom of the slide rail (2002).

3. The integrated sewage treatment station according to claim 2, characterized in that: The frame (2005) is provided with a cooperative shaft (2006) on the front side or the rear side.

4. The integrated sewage treatment station according to claim 3, characterized in that: A limit plate (2008) is fixedly mounted on the rotating shaft of the frame (2005), a plurality of limit grooves are evenly distributed on the limit plate (2008), and a limit pin (2007) cooperating with the limit plate (2008) is hingedly mounted on the mounting frame (2004).

5. The integrated sewage treatment station according to claim 4, characterized in that: The frame (2005) is a diffuser frame (2005), and a ventilation pipe (2009) is fixedly mounted on the mounting frame (2004), and the ventilation pipe (2009) is rotatably connected to a rotating shaft of the diffuser frame (2005).

6. The integrated sewage treatment station according to claim 1, characterized in that: The aeration system (18) includes a fan (6) and an aeration branch pipe (1802) installed at the bottom of the aerobic tank (9), and a plurality of microporous aeration disks (1803) are evenly distributed on the aeration branch pipe (1802). The anaerobic tank (7), the anoxic tank (8) and the flocculation sedimentation tank (14) are all provided with perforated pipes (1801), and the perforated pipes (1801) and the aeration branch pipes (1802) are both connected to the fan (6) through pipelines.

7. The integrated sewage treatment station according to claim 6, characterized in that: It also includes an air lift stirring system (19), the air lift stirring system (19) including a first stirring tube (1901) and a first air lift tube (1902) arranged at the bottom of the aerobic tank (9), a second air lift tube (1903) and a third air lift tube (1904) are arranged in the sludge sedimentation tank (10), a fourth air lift tube (1905) is arranged in the flocculation sedimentation tank (14), and a second stirring tube (1906) is arranged in the flocculation reaction tank (13), and the first stirring tube (1901), the second stirring tube (1906), the first air lift tube (1902), the second air lift tube (1903), the third air lift tube (1904) and the fourth air lift tube (1905) are all connected to a diaphragm air pump (11); The first gas lift pipe (1902) is connected to a nitrification liquid return pipe (901), the other end of which extends to the anaerobic tank (7); the second gas lift pipe (1903) is connected to a sludge return pipe (1003), the other end of which extends to the anaerobic tank (7); the third gas lift pipe (1904) is connected to a first excess sludge pipe (1004), the other end of which extends to the sludge tank (2); the fourth gas lift pipe (1905) is connected to a second excess sludge pipe (1401), the other end of which extends to the sludge tank (2); The fan (6) and the diaphragm air pump (11) are both electrically connected to the frequency converter.

8. The integrated sewage treatment station and sewage treatment process according to claim 7, characterized in that: The anoxic tank (8) is connected to a carbon source dosing device (5) for adding a carbon source, and the flocculation reaction tank (13) is connected to a dosing device (12) for adding a flocculant.

9. An integrated sewage treatment process, using the integrated sewage treatment station according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, sewage collection, sewage is filtered through artificial grids and discharged into the regulating tank (1); S2, decomposition of organic matter in sewage. After the sewage is discharged from the regulating tank (1) into the anaerobic tank (7), the organic matter in the sewage is degraded by anaerobic microorganisms in the anaerobic tank (7); S3, sewage nitrogen removal, after the sewage is discharged from the anaerobic tank (7) into the anoxic tank (8), a carbon source is added to the anoxic tank (8) to remove nitrogen from the sewage through denitrification; S4, removal of organic matter and ammonia nitrogen pollutants from sewage. After the sewage is discharged from the anoxic tank (8) into the aerobic tank (9), aerobic bacteria degrade the organic matter and ammonia nitrogen pollutants in the sewage. S5, preliminary sedimentation, sewage is discharged from the aerobic tank (9) into the sludge sedimentation tank (10), the sludge falls to the bottom of the sludge sedimentation tank (10) due to gravity sedimentation, the bottom of the sludge sedimentation tank (10) is a conical structure, which accelerates the sludge sedimentation and concentrates the sludge, and the settled sludge is discharged into the anaerobic tank (7) again through the sludge return pipe (1003); S6, flocculation reaction, after the sewage is initially precipitated, the supernatant is discharged into the flocculation reaction tank (13), a flocculant is added to the flocculation reaction tank (13) through the dosing device (12), and agitation is performed through the second stirring tube (1906) to allow the flocculant to fully react with the sewage; S7, flocculation and sedimentation, the sewage mixed with the flocculant is discharged into the flocculation and sedimentation tank (14) for further sedimentation, the sludge after sedimentation is discharged into the sludge tank (2) through the second residual sludge pipe (1401), and the supernatant after sedimentation is discharged into the clear water tank (15); S8, filtering and disinfecting: the supernatant in the clear water tank (15) is filtered and disinfected before being discharged.

10. The integrated sewage treatment process according to claim 9, characterized in that: When replacing the fiber bundle filler, the mounting frame (2004) is moved so that the mounting frame (2004) is moved closer to the middle of the slide rail (2002), so that a gap is reserved between the frame (2005) and the side wall of the anoxic pool (8) or the side wall of the aerobic pool (9) for the frame (2005) to rotate, and the height of the top of the frame (2005) is lowered to facilitate the replacement of the fiber bundle filler.

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