Distributed rural sewage treatment and resource utilization device

Abstract

The invention relates to the field of sewage treatment, and discloses a distributed rural sewage treatment and resource utilization device. Comprising an anaerobic fermentation tank, a bio-fertilizer tank is arranged on one side of the anaerobic fermentation tank, a manual deslagging device is arranged in the bio-fertilizer tank, a self-rotating biological rotary drum tank is arranged on one side of the anaerobic fermentation tank, a full-hollow polypropylene light biological rotary drum is arranged in the self-rotating biological rotary drum tank, and a double-spliced modular filter material filter is arranged on one side of the self-rotating biological rotary drum tank. The clean water tank is arranged on one side of the double-spliced module type filter material filter tank, and the photovoltaic power storage system is arranged at the upper end of the self-rotating biological drum tank, so that efficient removal of pollutants under a relatively high hydraulic load is realized, the problem of strong pollution discharge time period of rural retail households is solved through water storage of tanks with different functions, the operation is stable, and the maintenance is simple. The treated effluent is stable in quality and can be reused for farmland and vegetable field irrigation nearby, anaerobic fermentation biological manure is used for soil and farmland fertilization, and the sewage treatment rate and the resource utilization rate of rural retail households are greatly increased.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and specifically relates to a decentralized rural sewage treatment and resource utilization device. Background Art

[0002] At present, the decentralized on-site treatment of rural sewage in my country mainly adopts anaerobic method, anaerobic aerobic method (AO), anaerobic-anoxic-aerobic method (A2O), moving bed biofilm reactor (MBBR), etc. Other treatment processes mainly include artificial wetlands, contact oxidation and artificial fast infiltration, etc. The treatment of rural sewage in my country is mainly based on meeting the discharge standards, with a low level of resource utilization, and mostly refers to urban sewage treatment processes. The construction and operation and maintenance costs are high, the process selection is unreasonable, there is a lack of management and technical personnel, and rough maintenance makes it difficult for the treatment facilities to operate stably.

[0003] my country's decentralized rural domestic sewage is characterized by dispersed discharge, small volume, and difficulty in treatment. The sewage mainly comes from daily life such as kitchen, washing and toilet, with nitrogen, phosphorus and organic pollutants as the main components. Due to the scattered residence of rural residents and the lack of a complete sewage collection system, it is difficult to centrally treat sewage discharge. In addition, the seasonal characteristics of household sewage are very obvious, with higher discharge in summer than in winter. In addition, due to different economic and social conditions and lifestyles in different rural areas, the characteristics of sewage also vary.

[0004] At present, there are many difficulties in rural domestic sewage treatment. First, the equipment and processes are complicated, and the municipal model is copied. There is a shortage of professional operation and maintenance personnel, and stable operation and maintenance are difficult. Second, the water quality and quantity fluctuate greatly, and the traditional biochemical system is difficult to sustain and the water output is unstable. Third, it is easy to clog and contains large particles of impurities. If they are not intercepted, they will accumulate and affect treatment. Fourth, the emphasis is on meeting standards rather than utilization, and the resource utilization rate is low. Summary of the invention

[0005] The purpose of the present invention is to provide a decentralized rural sewage treatment and resource utilization device in order to solve the above-mentioned problems.

[0006] The technical solution adopted by the present invention is as follows: a decentralized rural sewage treatment and resource utilization device, including an anaerobic fermentation tank, a biological fertilizer tank is arranged on one side of the anaerobic fermentation tank, and one side of the anaerobic fermentation tank is connected with the biological fertilizer tank, a self-rotating biological drum tank is arranged on one side of the anaerobic fermentation tank, and one side of the anaerobic fermentation tank is connected with the self-rotating biological drum tank, a double-piece modular filter tank is arranged on one side of the self-rotating biological drum tank, and one side of the self-rotating biological drum tank is connected with the double-piece modular filter tank, a clean water tank is arranged on one side of the double-piece modular filter tank, and one side of the double-piece modular filter tank is connected with the clean water tank, and a photovoltaic power storage system is arranged on the upper end of the self-rotating biological drum tank.

[0007] By adopting the above technical solutions and designs, using biological turntables, various media fillers, intermittent oxygenation and anaerobic fermentation, etc., the efficient removal of pollutants under high hydraulic loads can be achieved, and the problem of strong periodicity of sewage discharge by rural households can be solved by storing water in different functional pools. The operation is stable and the maintenance is simple. The treated effluent has stable water quality and can be reused for irrigation of farmland and vegetable fields nearby. The biological manure produced by anaerobic fermentation is used for soil and farmland fertilization, which greatly improves the sewage treatment rate and resource utilization rate of rural households. Combined with photovoltaic power generation for energy storage and supply, the overall operating cost is low.

[0008] In a preferred embodiment, a cover plate 1 is rotatably connected to the upper end of the anaerobic fermentation tank, a water inlet is opened on one side of the upper end of the anaerobic fermentation tank, a filter basket corresponding to the water inlet is placed inside the anaerobic fermentation tank, a basket rope is provided at the upper end of the filter basket, an oil separator is provided on one side of the interior of the anaerobic fermentation tank, three parallel rotation-assisting water outlet pipes are provided on one side of the anaerobic fermentation tank, the rotation-assisting water outlet pipes are connected to the self-rotating biological drum tank, and a manure self-draining inclined plate is provided at the lower end of the anaerobic fermentation tank.

[0009] By adopting the above technical solution, sewage enters the interior of the filter basket from the water inlet, filters and separates solid waste in the sewage to prevent large particles from clogging the filter material. By opening the cover, the internal garbage accumulation of the filter basket can be observed, and the filter basket can be taken out regularly through the basket rope to clean the solid waste inside. The filtered sewage enters the interior of the anaerobic fermentation tank, and the grease in the kitchen wastewater can be isolated through the grease separator to prevent it from entering the subsequent biological treatment unit and affecting the biological treatment effect. The feces and other small solid particles in the sewage at the bottom of the anaerobic fermentation tank The solid matter and the sludge after anaerobic fermentation flow from the surface of the manure self-draining inclined plate into the interior of the biological fertilizer pool. The pathogenic bacteria and harmful organisms such as parasite eggs are killed through anaerobic fermentation, and high-quality organic fertilizer is produced at the same time. In addition, polyphosphate bacteria will release phosphorus and absorb easily degradable organic matter such as low-grade fats. Polyphosphate bacteria store phosphorus in the anaerobic fermentation tank and degrade some organic matter at the same time, causing the BOD5 concentration to increase first and then decrease. The COD removal rate can reach 60%~70%. The sewage after anaerobic fermentation flows into the interior of the self-rotating biological drum tank through the auxiliary rotating outlet pipe for subsequent treatment.

[0010] In a preferred embodiment, a plurality of air-permeable grilles are provided at the upper end of the self-rotating biological drum pool, a circular arc bottom surface is provided at the bottom end of the self-rotating biological drum pool, and three rows of six parallel oxygen-filling and rotation-assisting devices are provided on one side of the circular arc bottom surface. A mud discharge port is provided in the middle of the bottom end of the self-rotating biological drum pool, and a valve is installed at one end of the mud discharge port. A hollow polypropylene light biological drum is installed inside the self-rotating biological drum pool, a DO monitor is installed inside the self-rotating biological drum pool, a turntable center axis is installed inside the polypropylene light biological drum, and a plurality of fixed connecting rods are fixedly connected to the outer surface of the turntable center axis, and a fixed MBBR filler ring is provided on one side of the fixed connecting rod. A plurality of rotating teeth are provided on the surface of the polypropylene light biological drum, and every three rotating teeth form a group. A plurality of water-permeable holes are provided on the outer surface of the polypropylene light biological drum, and three parallel rectangular water outlets are provided on one side of the self-rotating biological drum pool, and the rectangular water outlets are connected to the double-piece modular filter media filter.

[0011] By adopting the above technical solution, the initially treated sewage falls into the rotating teeth. Under the action of gravity, the gravitational potential energy is converted into kinetic energy, driving the polypropylene lightweight biological drum to rotate. The drum itself and the fixed MBBR filler ring inside it can be used for microorganisms to attach and grow to form a biofilm. Intermittent aeration through the oxygenation and rotation-assisting device not only increases the dissolved oxygen concentration in the water, but also generates rising bubbles that can further promote the rotation of the polypropylene lightweight biological drum. The self-rotation of the polypropylene lightweight biological drum is achieved through the self-weight of the incoming water and the buoyancy of the bubbles, reducing the operating cost. When the polypropylene lightweight biological drum is immersed in sewage, it will be in anoxic state. The pollutants are adsorbed by the filler, and the air enters the interior of the self-rotating biological drum pool through the ventilation grille. When the polypropylene light biological drum leaves the water surface and is exposed to the air, the biofilm absorbs oxygen from the air and is in an aerobic state. The biofilm alternately contacts with sewage and air to form a continuous anoxic-aerobic state, effectively removing organic matter while achieving simultaneous nitrogen and phosphorus removal, so that the concentrations of BOD5 and COD continue to decrease. The biofilm formed on the surface of the polypropylene light biological drum is mainly composed of nitrifying bacteria, and the sludge sewage is mainly composed of polyphosphate bacteria, so that the microbial sludge age is separated independently to achieve simultaneous nitrogen and phosphorus removal. The arc bottom surface at the bottom of the self-rotating biological drum pool can receive the biofilm shed from the biological drum and the sludge settled in the water, and then the valve is manually opened to collect it through the sludge outlet, and then poured into the biological fertilizer pool for anaerobic fermentation.

[0012] In a preferred embodiment, the upper end of the double-piece modular filter tank is rotatably connected with a cover plate 2, the bottom of the double-piece modular filter tank is provided with a base, the bottom end of the double-piece modular filter tank is provided with a backwash aeration device, a grid water outlet is opened on one side of the double-piece modular filter tank, the grid water outlet is connected to the clean water tank, and three groups of honeycomb filter materials, two groups of grid filter materials and three groups of honeycomb filter materials are placed on the upper end of the base from left to right.

[0013] By adopting the above technical scheme, the sewage is degraded in the self-rotating biological drum pool and then flows into the double-combined modular filter tank by gravity. When the sewage passes through the surface of the honeycomb filter material and the grid filter material, a biofilm composed of microorganisms will gradually form, which is mainly composed of aerobic bacteria and some anaerobic bacteria. The microbial communities on the two filter materials are used to degrade organic matter and carry out biological denitrification reactions at the same time. In addition, the two filter materials can effectively remove suspended matter and some phosphorus elements in the water through interception, adsorption and desorption. Open the second cover, manually take out the honeycomb filter material and the grid filter material, and carry out a more thorough cleaning, which can extend the service life of the filter material and greatly reduce the later maintenance cost.

[0014] In a preferred embodiment, a water outlet pipe is provided at the upper end of the clean water tank, and a backwash mixed liquid discharge pipe is provided at the bottom end of the clean water tank.

[0015] By adopting the above technical solution, the treated sewage flows into the clean water tank by gravity and is discharged through the outlet pipe for re-use in farmland irrigation, thus improving the resource utilization rate of sewage.

[0016] In a preferred embodiment, a solar photovoltaic panel is installed at the upper end of the photovoltaic power storage system, an inverter is installed inside the photovoltaic power storage system, a battery pack is installed inside the photovoltaic power storage system, a control panel is installed on one side of the photovoltaic power storage system, a small aeration fan is installed inside the photovoltaic power storage system, the battery pack is electrically connected to the control panel and the small aeration fan, the control panel is electrically connected to the DO monitor, an air supply pipeline is provided at one end of the small aeration fan, a backwash air valve is installed at one end of the air supply pipeline, an aeration air valve is installed at one end of the air supply pipeline, one end of the air supply pipeline is connected to the oxygenation and rotation-assisting device, and one end of the air supply pipeline is connected to the backwash aeration device.

[0017] By adopting the above technical solution, solar energy is converted into electrical energy through solar photovoltaic panels and inverters, and the generated electrical energy is then stored in the battery pack. The DO monitor, control panel, small aeration fan and aeration valve are all low-power and low-energy devices, requiring only a small amount of power supply, so the battery pack can run for a long time after being fully charged once. The photovoltaic power storage system can be equipped with multiple battery packs according to different regional needs to increase the single-time endurance time.

[0018] In a preferred embodiment, a feed port is provided at the lower end of the bio-fertilizer tank, and the feed port is communicated with the manure self-discharge inclined plate. A manual slag discharge device is installed inside the bio-fertilizer tank, and a semi-arc bottom surface corresponding to the manual slag discharge device is provided at the lower end of the bio-fertilizer tank. A rotating shaft bracket is installed at the upper end of the manual slag discharge device. An upper rotating shaft is rotatably connected to the upper end of the manual slag discharge device, a rotating handle is provided on one side of the upper rotating shaft, and an upper driving shaft is provided at one end of the rotating handle. The lower end of the manual slag discharge device is rotatably connected to a lower rotating shaft, and a lower driving shaft is provided at one end of the lower rotating shaft. A conveyor belt is installed on the surface of the manual slag discharge device, and a plurality of manure discharge rotating teeth are provided on the surface of the conveyor belt.

[0019] By adopting the above technical scheme, the high-quality organic fertilizer produced by the anaerobic fermentation tank enters the interior of the biological fertilizer tank through the bottom manure self-discharge inclined plate. The operator drives the manual slag discharge device by rotating the handle, and then the rotating conveyor belt drives the manure discharge rotating teeth to rotate, so that the manure discharge rotating teeth will discharge the organic fertilizer filled with anaerobic fermentation, thereby improving the efficiency and convenience of fertilizer removal.

[0020] In a preferred embodiment, a DO monitoring panel is installed on the surface of the control panel, and a fan auto-start button, a fan auto-stop button, a fan start button and a fan shutoff button are installed on the surface of the control panel from top to bottom, and an aeration valve opening button and an aeration valve closing button are installed on the lower end of the control panel from left to right.

[0021] By adopting the above technical solution, according to the DO concentration of the water body fed back by the monitoring DO panel, when the monitored DO is less than 0.2 mg / L, the control panel lights up the fan self-start button and the aeration valve opening button, starts the small aeration fan and the aeration valve, and supplies air to the oxygenation auxiliary rotation device through the air supply pipeline. When the monitored DO is greater than 0.8 When the pressure drops to 0.1 mg / L, the control panel lights up the fan self-stop button and the aeration valve closing button, and turns off the fan self-start button and the aeration valve opening button, so that the aeration valve is closed, the small aeration fan stops running, and aeration stops, thereby realizing intermittent start and stop of the oxygenation-assisted rotation device, so that the water in the self-rotating biological drum tank remains in an anoxic state. The aeration valve closing button is lit through the control panel to close the aeration valve, and the backwash valve and the fan start button are manually opened. At this time, the fan self-start button and the fan self-stop button are automatically turned off, the small aeration fan starts to run, and the air supply pipeline supplies air to the backwash aeration device. The honeycomb filter material and the grid filter material are backwashed through aeration. The small amount of sewage generated is manually collected from the outlet pipe and poured back into the water inlet. After the filter material air washing is completed, the backwash air valve is manually closed, and the fan closing button is clicked to turn off the small aeration fan. The cleaning frequency is adjusted according to the changes in the inlet water quality, and the operation and maintenance workload is low.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. Use the filter basket to filter and separate large particles of solid waste in sewage. Open the cover to observe the accumulation of garbage and regularly take out the filter basket to clean up the garbage. This can effectively prevent large particles from entering the device and causing pipe or filler blockage, thereby extending the service life of the device and ensuring the sewage treatment effect.

[0024] 2. By setting up a non-powered, fully hollowed-out polypropylene lightweight biological drum, fixed MBBR filler rings, honeycomb filter materials and grid filter materials, various media carrier fillers are provided for the attachment and growth of microorganisms. By monitoring the DO concentration inside the self-rotating biological drum pool and combining intermittent aeration and oxygenation, the microbial membranes in different pools can realize their own unique functions, effectively degrade pollutants in sewage, and improve sewage treatment efficiency and effluent water quality stability.

[0025] 3. Through photovoltaic power supply and combined with battery energy storage, low-cost or no-cost stable operation is achieved. Only the PLC control system and small fans need to be powered, with low energy consumption and low operating costs. During normal operation, the PLC control system automatically starts and stops the small aeration fan according to the monitored DO concentration. The operation and maintenance are simple and no manual control is required, which reduces the difficulty of operation and maintenance and the operating cost.

[0026] 4. By utilizing microbial membranes in different functional areas to properly treat sewage, nutrients such as nitrogen and phosphorus can be reasonably retained. The treated effluent is used for farmland irrigation, and the bio-fertilizer after anaerobic fermentation is used to improve the fertility of farmland and soil, thereby achieving full on-site treatment and resource utilization of rural household sewage, and improving the resource utilization rate of sewage. At the same time, the manual slag discharge device makes it more convenient to use bio-fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the plan structure of the decentralized rural sewage treatment and resource utilization device of the present invention;

[0028] Figure 2 It is a front structural schematic diagram of the filter basket in the present invention;

[0029] Figure 3 It is a front structural schematic diagram of the biological fertilizer pool in the present invention;

[0030] Figure 4 It is a schematic diagram of the back structure of the biological fertilizer pool in the present invention;

[0031] Figure 5 It is a front cross-sectional structural diagram of the self-rotating biological drum tank in the present invention;

[0032] Figure 6It is a rear oblique cross-sectional structural diagram of the self-rotating biological drum pool in the present invention;

[0033] Figure 7 It is a schematic diagram of the planar structure of the control system in the present invention.

[0034] Markings in the figure: 1. Anaerobic fermentation tank; 2. Self-rotating biological drum tank; 3. Double modular filter media filter tank; 4. Clean water tank; 5. Photovoltaic power storage system; 6. Bio-fertilizer tank; 11. Water inlet; 12. Oil separator; 13. Manure self-draining inclined plate; 14. Auxiliary rotation outlet pipe; 15. Basket rope; 16. Filter basket; 17. Cover plate 1; 21. Polypropylene lightweight biological drum; 22. Fixed MBBR packing ring; 23. Rotating teeth; 24. DO monitor; 25. Oxygenation and rotation device; 26. Rectangular water outlet; 27. Mud outlet; 28. Breathable grille; 29. ​​Arc bottom surface; 211. Water permeable hole; 212. Fixed connecting rod; 213. Turntable center axis; 271. Valve; 31. Honeycomb filter media; 32. Grid filter media; 33. Bottom support; 34. Backwash aeration device; 35. Grid outlet Water inlet; 36, cover plate 2; 41, water outlet pipe; 42, backwashing mixed liquid discharge pipe; 51, solar photovoltaic panel; 52, inverter; 53, battery pack; 54, control panel; 55, small aeration fan; 551, air supply pipeline; 552, backwashing air valve; 553, aeration air valve; 61, rotating handle; 62, manure discharge rotating gear; 63, lower rotating shaft; 64, manual slag discharge device; 65 , rotating shaft bracket; 66, feeding port; 67, semi-arc bottom surface; 68, conveyor belt; 611, upper rotating shaft; 612, upper driving shaft; 631, lower driving shaft; 5401, fan automatic start button; 5402, fan automatic stop button; 5403, fan start button; 5404, fan stop button; 5405, aeration valve opening button; 5406, aeration valve closing button; 5407, monitoring DO panel. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Reference Figure 1-Figure 7A decentralized rural sewage treatment and resource utilization device comprises an anaerobic fermentation tank 1, a bio-fertilizer tank 6 is arranged on one side of the anaerobic fermentation tank 1, one side of the anaerobic fermentation tank 1 is connected with the bio-fertilizer tank 6, a self-rotating biological drum tank 2 is arranged on one side of the anaerobic fermentation tank 1, one side of the anaerobic fermentation tank 1 is connected with the self-rotating biological drum tank 2, a double-splice modular filter tank 3 is arranged on one side of the self-rotating biological drum tank 2, one side of the self-rotating biological drum tank 2 is connected with the double-splice modular filter tank 3, a clean water tank 4 is arranged on one side of the double-splice modular filter tank 3, one side of the double-splice modular filter tank 3 is connected with the clean water tank 4, and a photovoltaic power storage system 5 is arranged on the upper end of the self-rotating biological drum tank 2. Through the above design, by means of biological rotary disc, multiple media fillers, intermittent oxygenation and anaerobic fermentation, efficient removal of pollutants under high hydraulic load is achieved, and the problem of strong periodicity of sewage discharge by individual households in rural areas is solved by storing water in different functional pools, with stable operation and simple maintenance. The treated effluent has stable water quality and can be reused for irrigation of farmland and vegetable fields. The anaerobic fermented bio-fertilizer is used for soil and farmland fertilization, which greatly improves the sewage treatment rate and resource utilization rate of rural households. Combined with photovoltaic power generation for energy storage and supply, the overall operating cost is low.

[0037] Reference Figure 1-Figure 2 and Figure 5The upper end of the anaerobic fermentation tank 1 is rotatably connected with a cover plate 17, a water inlet 11 is provided on one side of the upper end of the anaerobic fermentation tank 1, a filter basket 16 corresponding to the water inlet 11 is placed inside the anaerobic fermentation tank 1, a basket rope 15 is provided on the upper end of the filter basket 16, an oil separator 12 is provided on one side of the interior of the anaerobic fermentation tank 1, three parallel auxiliary rotation outlet pipes 14 are provided on one side of the anaerobic fermentation tank 1, and the auxiliary rotation outlet pipes 14 are connected to the self-rotating biological drum tank 2, and a manure self-draining inclined plate 13 is provided at the lower end of the anaerobic fermentation tank 1. Sewage enters the interior of the filter basket 16 from the water inlet 11 to filter and separate solid waste in the sewage to prevent large particles from clogging the filter material. By opening the cover plate 17, the internal garbage accumulation of the filter basket 16 can be observed, and the filter basket 16 can be taken out regularly through the basket rope 15 to clean the solid waste inside it. The filtered sewage enters the anaerobic fermentation tank 1. The grease in the kitchen wastewater can be isolated by the oil separator 12 to prevent it from entering the subsequent biological treatment unit and affecting the biological treatment effect. The feces, other small solid particles in the sewage at the bottom of the anaerobic fermentation tank 1 and the sludge after anaerobic fermentation flow from the surface of the manure self-discharge inclined plate 13 into the interior of the biological fertilizer tank 6. The pathogenic bacteria and harmful organisms such as parasite eggs are killed through anaerobic fermentation, and high-quality organic fertilizer is produced at the same time. In addition, polyphosphate bacteria will release phosphorus and absorb easily degradable organic matter such as low-grade fats. The polyphosphate bacteria store phosphorus in the anaerobic fermentation tank and degrade some organic matter at the same time, so that the BOD5 concentration increases first and then decreases, and the COD removal rate can reach 60%~70%. The sewage after anaerobic fermentation flows by gravity through the auxiliary rotating outlet pipe 14 into the interior of the self-rotating biological drum tank 2 for subsequent treatment.

[0038] Reference Figure 1 and Figure 5-Figure 6A plurality of air-permeable grilles 28 are provided at the upper end of the self-rotating biological drum pool 2, a circular arc bottom surface 29 is provided at the bottom end of the self-rotating biological drum pool 2, and three parallel rows of six oxygen-filling and rotation-assisting devices 25 are provided on one side of the circular arc bottom surface 29. A mud discharge port 27 is provided in the middle of the bottom end of the self-rotating biological drum pool 2, and a valve 271 is installed at one end of the mud discharge port 27. A hollow polypropylene light biological drum 21 is installed inside the self-rotating biological drum pool 2, a DO monitor 24 is installed inside the self-rotating biological drum pool 2, and a turntable central axis 213 is installed inside the polypropylene light biological drum 21. The outer surface of the central axis 213 of the turntable is fixedly connected with a plurality of fixed connecting rods 212, and a fixed MBBR filler ring 22 is arranged on one side of the fixed connecting rod 212. The surface of the polypropylene light biological drum 21 is provided with a plurality of rotating teeth 23, and each three rotating teeth 23 form a group. The outer surface of the polypropylene light biological drum 21 is provided with a plurality of water-permeable holes 211, and three parallel rectangular water outlets 26 are provided on one side of the self-rotating biological drum pool 2. The rectangular water outlet 26 is connected to the double-piece modular filter material filter 3, and the initially treated sewage falls into the rotating teeth 23, and under the action of gravity, Gravitational potential energy is converted into kinetic energy to drive the polypropylene light biological drum 21 to rotate. The polypropylene light biological drum 21 and the fixed MBBR filler ring 22 inside it can be used for microorganisms to attach and grow to form a biofilm. Intermittent aeration through the oxygenation and rotation-assisting device 25 not only increases the dissolved oxygen DO concentration in the water body, but also generates rising bubbles that can further drive the polypropylene light biological drum 21 to rotate. The rotation of the polypropylene light biological drum 21 is achieved through the dead weight of the incoming water and the buoyancy of the bubbles, reducing the operating cost. When the polypropylene light biological drum 21 is immersed in sewage, it will be in an oxygen-deficient state, and pollutants will be adsorbed through the filler, and the air Air enters the interior of the self-rotating biological drum pool 2 through the ventilation grille 28. When the polypropylene light biological drum 21 leaves the water surface and is exposed to the air, the biofilm absorbs oxygen from the air and is in an aerobic state. The biofilm alternately contacts with sewage and air to form a continuous anoxic-aerobic AO state, effectively removing organic matter while achieving simultaneous denitrification and phosphorus removal, so that the concentrations of BOD5 and COD continue to decrease. The biofilm formed on the surface of the polypropylene light biological drum 21 is mainly composed of nitrifying bacteria, and the sludge sewage is mainly composed of polyphosphate bacteria, so that the microbial sludge age is separated independently, and synchronous denitrification and phosphorus removal is achieved. The arc bottom surface 29 at the bottom of the self-rotating biological drum pool 2 can receive the biofilm that falls off the biological drum and the sludge that sinks in the water, and then the artificial valve 271 is opened to collect it through the mud outlet 27, and then poured into the biological fertilizer pool 6 for anaerobic fermentation.

[0039] Reference Figure 1The upper end of the double-piece modular filter tank 3 is rotatably connected with a cover plate 2 36, the bottom of the double-piece modular filter tank 3 is provided with a bottom support 33, the bottom end of the double-piece modular filter tank 3 is provided with a backwash aeration device 34, and a grid water outlet 35 is opened on one side of the double-piece modular filter tank 3, and the grid water outlet 35 is connected to the clean water tank 4. Three groups of honeycomb filter materials 31, two groups of grid filter materials 32 and three groups of honeycomb filter materials 31 are placed on the upper end of the bottom support 33 from left to right. After the sewage is degraded by the self-rotating biological drum tank 2, it flows into the double-piece modular filter tank 3 by gravity, and the sewage passes through the honeycomb filter tank 3. When the honeycomb filter material 31 and the mesh filter material 32 are coated with water, a biofilm composed of microorganisms will gradually form, which is mainly composed of aerobic bacteria and some anaerobic bacteria. The microbial communities on the two filter materials can degrade organic matter and carry out biological denitrification reaction at the same time. In addition, the two filter materials can also effectively remove suspended matter and some phosphorus elements in the water through interception, adsorption and desorption. The cover plate 36 is opened, and the honeycomb filter material 31 and the mesh filter material 32 are manually taken out for more thorough cleaning, which can extend the service life of the filter material and greatly reduce the low cost of later maintenance filter material replacement frequency.

[0040] Reference Figure 1 The upper end of the clean water tank 4 is provided with an outlet pipe 41, and the bottom end of the clean water tank 4 is provided with a backwash mixed liquid discharge pipe 42. The treated sewage flows into the clean water tank 4 by gravity and is discharged through the outlet pipe 41 for use in farmland irrigation, thereby improving the resource utilization rate of sewage.

[0041] Reference Figure 1 and Figure 7 A solar photovoltaic panel 51 is installed at the upper end of the photovoltaic power storage system 5, an inverter 52 is installed inside the photovoltaic power storage system 5, a battery pack 53 is installed inside the photovoltaic power storage system 5, a control panel 54 is installed on one side of the photovoltaic power storage system 5, a small aeration fan 55 is installed inside the photovoltaic power storage system 5, the battery pack 53 is electrically connected to the control panel 54 and the small aeration fan 55, the control panel 54 is electrically connected to the DO monitor 24, an air supply pipeline 551 is provided at one end of the small aeration fan 55, and a recoil is installed at one end of the air supply pipeline 551 The air washing valve 552, an aeration valve 553 is installed at one end of the air supply pipeline 551, one end of the air supply pipeline 551 is connected to the oxygenation and rotation assisting device 25, and one end of the air supply pipeline 551 is connected to the backwashing aeration device 34. The solar energy is converted into electrical energy through the solar photovoltaic panel 51 and the inverter 52, and the generated electrical energy is then stored in the battery pack 53. The DO monitor 24, the control panel 54, the small aeration fan 55 and the aeration valve 553 are all low-power and low-energy consumption equipment, and only a small amount of electrical energy is required. Therefore, the battery pack can run for a long time after being fully charged once. The photovoltaic power storage system 5 can be equipped with multiple battery packs 53 according to the different regional needs and the length of the annual light hours to increase the single battery life.

[0042] Reference Figure 1 and Figure 3-Figure 4 A feed port 66 is provided at the lower end of the bio-fertilizer tank 6, and the feed port 66 is communicated with the manure self-discharging inclined plate 13. A manual slag discharge device 64 is installed inside the bio-fertilizer tank 6. A semi-arc bottom surface 67 corresponding to the manual slag discharge device 64 is provided at the lower end of the bio-fertilizer tank 6. A rotating shaft bracket 65 is installed at the upper end of the manual slag discharge device 64. An upper rotating shaft 611 is rotatably connected inside the upper end of the manual slag discharge device 64. A rotating handle 61 is provided on one side of the upper rotating shaft 611. An upper driving shaft 612 is provided at one end of the rotating handle 61. The lower end of the manual slag discharge device 64 is rotatably connected to a lower rotating shaft 611. The rotating shaft 63, one end of the lower rotating shaft 63 is provided with a lower driving shaft 631, the surface of the manual slag discharge device 64 is installed with a conveyor belt 68, and the surface of the conveyor belt 68 is provided with a plurality of manure discharge rotating teeth 62. The high-quality organic fertilizer produced by the fermentation of the anaerobic fermentation tank 1 enters the interior of the biological fertilizer tank 6 from the manure self-discharge inclined plate 13 at the bottom. The operator drives the manual slag discharge device 64 by rotating the handle 61, and then the rotating conveyor belt 68 drives the manure discharge rotating teeth 62 to rotate, so that the manure discharge rotating teeth 62 discharge the organic fertilizer filled with anaerobic fermentation, thereby improving the efficiency and convenience of fertilizer removal.

[0043] Reference Figure 7A DO monitoring panel 5407 is installed on the surface of the control panel 54. A fan self-start button 5401, a fan self-stop button 5402, a fan start button 5403 and a fan stop button 5404 are installed on the surface of the control panel 54 from top to bottom. An aeration valve opening button 5405 and an aeration valve closing button 5406 are installed on the lower end of the control panel 54 from left to right. According to the water DO concentration fed back by the DO monitoring panel 5407, when the monitored DO is less than 0.2 mg / L, the control panel 54 turns on the fan self-start button 5401 and the aeration valve opening button 5405, turns on the small aeration fan 55 and the aeration valve 553, and supplies air to the oxygenation auxiliary rotation device 25 through the air supply pipeline 551. When the monitored DO is greater than 0.8 When the oxygen concentration in the self-rotating biological drum tank 2 is less than 200 mg / L, the control panel 54 lights up the fan automatic stop button 5402 and the aeration valve closing button 5406, and turns off the fan automatic start button 5401 and the aeration valve opening button 5405, so that the aeration valve 553 is closed, the small aeration fan 55 stops running, and the aeration stops, thereby realizing the intermittent start and stop of the oxygenation and rotation assisting device 25, so that the water body in the self-rotating biological drum tank 2 remains in anoxic state, and the aeration valve closing button 5406 is lit through the control panel 54, thereby closing the aeration valve 553, and manually opening the backwashing valve 552, At this time, the fan automatic start button 5401 and the fan automatic stop button 5402 are automatically extinguished, the small aeration fan 55 starts to run, and the air supply pipeline 551 supplies air to the backwash aeration device 34. The honeycomb filter material 31 and the grid filter material 32 are backwashed by aeration. The small amount of sewage generated is manually collected by the outlet pipe 41 and poured back into the water inlet. After the filter material air washing is completed, the backwash air valve 552 is manually closed, and the fan shutdown button 5404 is clicked to turn off the small aeration fan 55. The cleaning frequency is adjusted according to the changes in the inlet water quality, and the operation and maintenance workload is low.

[0044] The implementation principle of a decentralized rural sewage treatment and resource utilization device embodiment of the present invention is:

[0045] During treatment, sewage enters the interior of the filter basket 16 from the water inlet 11, and solid waste in the sewage is filtered and separated to prevent large particles from clogging the filter material. The garbage accumulation inside the filter basket 16 can be observed by opening the cover 17, and the filter basket 16 is regularly taken out through the basket rope 15 to clean the solid waste inside. The filtered sewage enters the interior of the anaerobic fermentation tank 1, and the grease in the kitchen waste water can be isolated by the oil separator 12. The feces, other small solid particles in the sewage at the bottom of the anaerobic fermentation tank 1 and the sludge after anaerobic fermentation flow from the surface of the manure self-discharge inclined plate 13 into the interior of the biological fertilizer tank 6, and harmful organisms such as pathogenic bacteria and parasite eggs are killed through anaerobic fermentation, while producing high-quality Organic fertilizer. In addition, polyphosphate bacteria will release phosphorus and absorb easily degradable organic matter such as low-grade fats. The sewage after anaerobic fermentation flows into the interior of the self-rotating biological drum pool 2 through the auxiliary rotating water outlet pipe 14 for subsequent treatment. The initially treated sewage falls into the rotating teeth 23. Under the action of gravity, the gravitational potential energy is converted into kinetic energy, driving the polypropylene light biological drum 21 to rotate. The fixed MBBR filler ring 22 on the surface of the polypropylene light biological drum 21 can be used for microorganisms to attach and grow to form a biofilm. Intermittent aeration through the oxygenation auxiliary rotating device 25 not only increases the dissolved oxygen DO concentration in the water body, but also generates rising bubbles to further promote the rotation of the polypropylene light biological drum 21. The polypropylene light biological drum 21 is realized through the self-weight of the incoming water and the buoyancy of the bubbles. 21 rotates, when the polypropylene light biological drum 21 is immersed in sewage, it will be in anoxic state, pollutants are adsorbed by the filler, and air enters the interior of the self-rotating biological drum pool 2 through the air permeable grille 28. When the polypropylene light biological drum 21 leaves the water surface and is exposed to the air, the biofilm absorbs oxygen from the air and is in an aerobic state. The biofilm alternately contacts with sewage and air to form a continuous anoxic-aerobic AO state, which effectively removes organic matter and realizes simultaneous nitrogen and phosphorus removal. The biofilm formed on the surface of the polypropylene light biological drum 21 is mainly composed of nitrifying bacteria, and the sludge sewage is mainly composed of polyphosphate bacteria, so that the microbial sludge age is separated independently to achieve simultaneous nitrogen and phosphorus removal. The arc bottom surface 29 at the bottom of the self-rotating biological drum pool 2 can The biofilm falling off the surface of the polypropylene light biological drum 21 and the sludge settled in the water are received, and then the sludge is collected through the sludge outlet 27 by manually opening the valve 271, and poured into the biological fertilizer pool 6 for anaerobic fermentation. The sewage is degraded by the self-rotating biological drum pool 2 and flows into the double-combination modular filter tank 3 by gravity. When the sewage passes through the surface of the honeycomb filter material 31 and the grid filter material 32, a layer of biofilm composed of microorganisms will gradually form. The microbial communities on the two filter materials are used to degrade organic matter, and biological denitrification reactions are carried out at the same time. The two filter materials can effectively remove suspended matter and part of phosphorus in the water through interception, adsorption and desorption. The cover plate 2 36 is opened, and the honeycomb filter material 31 and the grid filter material 32 are manually taken out for more thorough cleaning.The high-quality organic fertilizer produced by the fermentation in the anaerobic fermentation tank 1 enters the interior of the biological fertilizer tank 6 through the bottom manure self-discharge inclined plate 13. The operator drives the manual slag discharge device 64 by rotating the handle 61, and then the rotating conveyor belt 68 drives the manure discharge rotating teeth 62 to rotate, so that the manure discharge rotating teeth 62 discharge the organic fertilizer filled with anaerobic fermentation. According to the water DO concentration fed back by the monitoring DO panel 5407, when the monitored DO is less than 0.2 mg / L, the control panel 54 turns on the fan self-start button 5401 and the aeration valve opening button 5405, turns on the small aeration fan 55 and the aeration valve 553, and supplies air to the oxygenation auxiliary rotating device 25 through the air supply pipeline 551. When the monitored DO is greater than 0.8 When the oxygen content in the self-rotating biological drum tank 2 is less than 200 mg / L, the control panel 54 lights up the fan self-stop button 5402 and the aeration valve closing button 5406, and turns off the fan self-start button 5401 and the aeration valve opening button 5405, so that the aeration valve 553 is closed, the small aeration fan 55 stops running, and the aeration stops, thereby realizing the intermittent start and stop of the oxygenating and rotating device 25, so that the water in the self-rotating biological drum tank 2 remains in an anoxic state, and the aeration valve closing button 5406 is lit through the control panel 54, thereby closing the aeration valve 553, and manually opening the backwashing valve 552 and The fan start button 5403, at this time, the fan self-start button 5401 and the fan self-stop button 5402 are automatically extinguished, the small aeration fan 55 starts to run, and the air supply pipeline 551 supplies air to the backwash aeration device 34. The honeycomb filter material 31 and the grid filter material 32 are backwashed through aeration. The small amount of sewage generated is collected manually by the outlet pipe 41 and poured back into the water inlet. After the filter material air washing is completed, click the fan stop button 5404 and manually close the backwash air valve 552. The cleaning frequency is adjusted according to the change of the inlet water quality, and the operation and maintenance workload is low.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A decentralized rural sewage treatment and resource utilization device, comprising an anaerobic fermentation tank (1), characterized in that: A biological fertilizer pool (6) is arranged on one side of the anaerobic fermentation pool (1), and one side of the anaerobic fermentation pool (1) is connected to the biological fertilizer pool (6). A self-rotating biological drum pool (2) is arranged on one side of the anaerobic fermentation pool (1), and one side of the anaerobic fermentation pool (1) is connected to the self-rotating biological drum pool (2). A double-joined modular filter pool (3) is arranged on one side of the self-rotating biological drum pool (2), and one side of the self-rotating biological drum pool (2) is connected to the double-joined modular filter pool (3). A clean water pool (4) is arranged on one side of the double-joined modular filter pool (3), and one side of the double-joined modular filter pool (3) is connected to the clean water pool (4). A photovoltaic power storage system (5) is arranged at the upper end of the self-rotating biological drum pool (2).

2. A decentralized rural sewage treatment and resource utilization device as claimed in claim 1, characterized in that: The upper end of the anaerobic fermentation tank (1) is rotatably connected to a cover plate 1 (17); a water inlet (11) is provided on one side of the upper end of the anaerobic fermentation tank (1); a filter basket (16) corresponding to the water inlet (11) is placed inside the anaerobic fermentation tank (1); a basket rope (15) is provided at the upper end of the filter basket (16); an oil separator (12) is provided on one side of the interior of the anaerobic fermentation tank (1); three parallel rotation-assisting water outlet pipes (14) are provided on one side of the anaerobic fermentation tank (1); the rotation-assisting water outlet pipes (14) are connected to the self-rotating biological drum tank (2); and a manure self-discharge inclined plate (13) is provided at the lower end of the anaerobic fermentation tank (1).

3. A decentralized rural sewage treatment and resource utilization device as claimed in claim 2, characterized in that: The upper end of the self-rotating biological drum pool (2) is provided with a plurality of air-permeable grilles (28); the lower end of the self-rotating biological drum pool (2) is provided with an arc bottom surface (29); one side of the arc bottom surface (29) is provided with three parallel rows of six oxygen-charging and rotation-assisting devices (25); a mud discharge port (27) is provided in the middle of the lower end of the self-rotating biological drum pool (2); a valve (271) is installed at one end of the mud discharge port (27); a fully hollow polypropylene light biological drum (21) is installed inside the self-rotating biological drum pool (2); a DO monitor (24) is installed inside the self-rotating biological drum pool (2); and the interior of the polypropylene light biological drum (21) is provided with a DO monitor (24). A turntable center axis (213) is installed on the part, and a plurality of fixed connecting rods (212) are fixedly connected to the outer surface of the turntable center axis (213), and a fixed MBBR filler ring (22) is arranged on one side of the fixed connecting rod (212). A plurality of rotating teeth (23) are arranged on the surface of the polypropylene light biological drum (21), and each three rotating teeth (23) form a group. A plurality of water permeable holes (211) are opened on the outer surface of the polypropylene light biological drum (21), and three parallel rectangular water outlets (26) are opened on one side of the self-rotating biological drum pool (2), and the rectangular water outlets (26) are connected to the double-piece modular filter material filter pool (3).

4. A decentralized rural sewage treatment and resource utilization device as claimed in claim 3, characterized in that: The upper end of the double modular filter media filter (3) is rotatably connected to a second cover plate (36), the bottom of the double modular filter media filter (3) is provided with a base (33), the bottom of the double modular filter media filter (3) is provided with a backwash aeration device (34), one side of the double modular filter media filter (3) is provided with a grid water outlet (35), the grid water outlet (35) is connected to the clean water tank (4), and three groups of honeycomb filter media (31), two groups of grid filter media (32) and three groups of honeycomb filter media (31) are placed on the upper end of the base (33) from left to right.

5. A decentralized rural sewage treatment and resource utilization device as claimed in claim 4, characterized in that: The upper end of the clean water tank (4) is provided with a water outlet pipe (41), and the bottom end of the clean water tank (4) is provided with a backwash mixed liquid discharge pipe (42).

6. A decentralized rural sewage treatment and resource utilization device as claimed in claim 5, characterized in that: A solar photovoltaic panel (51) is installed at the upper end of the photovoltaic power storage system (5), an inverter (52) is installed inside the photovoltaic power storage system (5), a battery pack (53) is installed inside the photovoltaic power storage system (5), a control panel (54) is installed on one side of the photovoltaic power storage system (5), a small aeration fan (55) is installed inside the photovoltaic power storage system (5), and the battery pack (53) is electrically connected to the control panel (54) and the small aeration fan (55). The control panel (54) is electrically connected to the DO monitor (24); an air supply pipeline (551) is provided at one end of the small aeration fan (55); a backwashing air valve (552) is installed at one end of the air supply pipeline (551); an aeration air valve (553) is installed at one end of the air supply pipeline (551); one end of the air supply pipeline (551) is connected to the oxygenation and rotation-assisting device (25); and one end of the air supply pipeline (551) is connected to the backwashing aeration device (34).

7. A decentralized rural sewage treatment and resource utilization device as claimed in claim 6, characterized in that: The lower end of the biological fertilizer pool (6) is provided with a feed inlet (66), the feed inlet (66) being in communication with the manure self-discharging inclined plate (13), the interior of the biological fertilizer pool (6) being provided with a manual slag discharge device (64), the lower end of the biological fertilizer pool (6) being provided with a semi-arc bottom surface (67) corresponding to the manual slag discharge device (64), the upper end of the manual slag discharge device (64) being provided with a rotating shaft bracket (65), the upper end of the manual slag discharge device (64) being rotatably connected to an upper shaft bracket (65). A rotating shaft (611), a rotating handle (61) is provided on one side of the upper rotating shaft (611), an upper driving shaft (612) is provided at one end of the rotating handle (61), a lower rotating shaft (63) is rotatably connected to the lower end of the manual slag discharge device (64), a lower driving shaft (631) is provided at one end of the lower rotating shaft (63), a conveyor belt (68) is installed on the surface of the manual slag discharge device (64), and a plurality of manure discharge rotating teeth (62) are provided on the surface of the conveyor belt (68).

8. A decentralized rural sewage treatment and resource utilization device as claimed in claim 7, characterized in that: A DO monitoring panel (5407) is installed on the surface of the control panel (54), and a fan automatic start key (5401), a fan automatic stop key (5402), a fan start key (5403) and a fan stop key (5404) are installed on the surface of the control panel (54) from top to bottom, and an aeration valve opening key (5405) and an aeration valve closing key (5406) ​​are installed on the lower end of the control panel (54) from left to right.

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