Modularized rural sewage-biogas-fertilizer co-production system based on micro-aerobic circulation

Abstract

The invention provides a modular rural sewage-biogas-fertilizer co-production system based on micro-aerobic circulation, which comprises a water distribution unit, a plurality of treatment units and a co-production unit, the water distribution unit comprises a distribution box and a plurality of partition plates fixedly connected with the inner wall of the distribution box, the plurality of partition plates divide the distribution box into a plurality of water storage areas, and the water storage areas are communicated with the treatment units. The water storage areas are provided with preset water levels, and the partition plates are provided with through grooves for communicating the two adjacent water storage areas at the elevation positions of the preset water levels. The treatment units are communicated with the water storage areas in a one-to-one correspondence mode, valves are arranged at the communication positions of the treatment units and the corresponding water storage areas, and the treatment units conduct hydrolytic acidification treatment, micro-aerobic reaction treatment and biological treatment on sewage flowing out of the corresponding water storage areas in sequence; the co-production unit comprises a gas collection module and a fertilizer preparation module, the gas collection module is used for collecting biogas generated by the treatment unit, and the fertilizer preparation module is used for preparing redundant sludge of the treatment unit into biochar. The working pressure of the sewage treatment system is reduced when the water consumption is increased suddenly.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular relates to a modular rural sewage-biogas-fertilizer co-production system based on micro-oxygen circulation. Background Art

[0002] In order to achieve the dual goals of environmental benefits and improvement of people's livelihood, sewage treatment technology that combines pollutant removal and resource recovery has emerged.

[0003] Existing rural sewage treatment facilities are generally built using a fixed-scale model, where treatment capacity is determined based on the registered population. However, the rural population is mobile, and the number of people on holidays far exceeds that on weekdays. This leads to a surge in water consumption during these holidays, which overloads sewage treatment systems. Summary of the Invention

[0004] The embodiment of the present invention provides a modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation, which aims to solve the technical problem of overload of sewage treatment system caused by sudden increase in water consumption.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is to provide a modular rural sewage-biogas-fertilizer co-generation system based on micro-aerobic circulation, comprising: A water distribution unit comprises a distribution box and a plurality of partitions fixed to the inner wall of the distribution box, wherein the plurality of partitions divide the distribution box into a plurality of water storage areas, wherein the water storage areas are provided with preset water levels, and the partitions are provided with through grooves at the preset water level elevations for connecting two adjacent water storage areas; a plurality of treatment units, connected to the water storage areas in a one-to-one correspondence, wherein valves are provided at the connection points between the treatment units and the corresponding water storage areas, and wherein the treatment units sequentially perform hydrolysis and acidification treatment, microaerobic reaction treatment, and biological treatment on the sewage flowing out of the corresponding water storage areas; and The co-production unit includes a gas collection module and a fertilizer production module. The gas collection module is used to collect the biogas generated by the processing unit, and the fertilizer production module is used to produce biochar from the excess sludge of the processing unit.

[0006] In a possible implementation, a water channel is provided at the bottom of the partition, and a receiving cavity is provided on the inner wall of the water channel; The water distribution unit also includes: a water baffle disposed in the receiving cavity, the water baffle being slidably connected to the partition in an up-and-down direction, the water baffle having a first working position for being received in the receiving cavity and a second working position for blocking the water channel; and The first telescopic member is fixed between the partition and the water baffle, and the first telescopic member is telescopic in the up-down direction; the first telescopic member enables the water baffle to switch between the first working position and the second working position.

[0007] In a possible implementation, the water distribution unit further includes: A plurality of water inlet pipes are connected one by one with the water storage areas; a plurality of sealing plates corresponding one to each of the water inlet pipes, the sealing plates being slidably connected to the distribution box along a first direction, the sealing plates being provided with through holes, the sealing plates being capable of a first working state in which the water outlet end of the water inlet pipe is aligned with the through hole, and a second working state in which the water outlet end of the water inlet pipe is misaligned with the through hole; and The transmission structure is provided between the closing plate and the first telescopic member, so that the closing plate can be switched between the first working state and the second working state.

[0008] In a possible implementation, a water inlet communicating with the water inlet pipe is formed on the top wall of the distribution box; The transmission structure includes: A lifting plate is provided in the storage cavity, and the lifting plate is slidably connected to the partition along an up-down direction; A transmission sleeve is extended and retracted along the first direction, one end of the transmission sleeve is connected to the receiving cavity, the other end is in a blocked state, and the end of the transmission sleeve connected to the receiving cavity is fixedly connected to the partition; and An elastic member is fixedly connected between the sealing plate and the distribution box, and the elastic member has a pre-tightening force that enables the sealing plate to be in the second working state.

[0009] In one possible implementation, the treatment unit includes a hydrolysis and acidification treatment module, a microaerobic reaction module, and a bacterial colony symbiosis module. The hydrolysis and acidification treatment module is connected to the corresponding water storage area. The hydrolysis and acidification treatment is used to hydrolyze and acidify the sewage flowing out of the corresponding water storage area. The microaerobic reaction module is connected to the water outlet of the hydrolysis and acidification treatment module. The microaerobic reaction module performs aeration treatment on the sewage. The bacterial colony symbiosis module is connected to the water outlet of the microaerobic reaction module. The bacterial colony symbiosis module performs biological treatment on the sewage. The co-generation unit further includes a power generation module, the power generation module includes a generator and a waste heat recovery pipeline, and the waste heat recovery pipeline is connected to the micro-oxygen reaction module; The gas collecting module includes a gas collecting cover corresponding to the micro-oxygen reaction module one by one and a gas collecting tank connected to the gas collecting cover. The gas collecting cover is arranged on the top of the micro-oxygen reaction module, and the gas collecting tank is connected to the generator.

[0010] In a possible implementation, the co-production unit further includes a sludge concentration tank, which is connected to the hydrolysis and acidification treatment module, the microaerobic reaction module, and the bacterial colony symbiosis module; The fertilizer production module includes a sludge pyrolysis furnace connected to the sludge concentration tank, and the sludge pyrolysis furnace is also connected to the waste heat recovery pipeline.

[0011] In one possible implementation, the bacterial colony symbiosis module includes: Symbiotic pond; An annular filler frame is provided in the symbiotic pool, and the filler frame is slidably connected to the symbiotic pool in an up-down direction; a second telescopic member, telescopic along the up-down direction, the second telescopic member being fixedly connected between the symbiotic tank and the filling frame; A plurality of rollers are arranged at intervals around the central axis of the filling frame, the filling plate is rotatably connected to the filling frame, and the rollers have an up-down direction as a rotation axis; A plurality of filler plates are fixedly connected to the rotating rollers in a one-to-one correspondence; and A plurality of packing layers are arranged on the packing plate in a one-to-one correspondence.

[0012] In a possible implementation, the symbiotic pool is provided with a plurality of transmission cavities, each corresponding to the rotating roller. The inner wall of the transmission cavity is provided with a first transmission groove and a second transmission groove, wherein the first transmission groove extends in the vertical direction, and the second transmission groove is provided in a spiral direction, and the first transmission groove and the second transmission groove are connected end to end. The bacterial colony symbiosis module further comprises: A plurality of transmission rods are disposed in the transmission cavity in a one-to-one correspondence, and the transmission rods are in transmission connection with the rotating rollers; and A plurality of transmission blocks are fixedly connected to the transmission rod in a one-to-one correspondence. The transmission blocks are slidably fitted with the first transmission grooves, and the transmission blocks are also slidably fitted with the second transmission grooves.

[0013] In one possible implementation, the side of the filler plate facing away from the roller is recessed inward to form an installation cavity for installing the filler, and the inner wall of the installation cavity is provided with two oppositely arranged receiving grooves, and a card block is slidingly adapted in the receiving groove, and a deformable part is fixed between the card block and the filler plate, and the deformable part has a pre-tightening force that causes the card block to extend out of the receiving groove.

[0014] In a possible implementation, an airbag and a pneumatic component connected to the airbag are provided in the receiving groove, and the pneumatic component is used to supply air to or exhaust air from the airbag.

[0015] The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation provided by the present invention, compared with the existing technology, is characterized by the following features: when the water level in a certain water storage area reaches a preset level, the sewage flows into the adjacent water storage area through a channel. When water begins to enter the water storage area, the corresponding valve in the water storage area opens, allowing the sewage to enter the corresponding treatment unit for treatment; sewage treatment is integrated with biogas collection and sludge fertilizer production, turning waste into treasure, solving the pollution problem while producing biogas energy and organic fertilizer, thus achieving a closed loop of waste treatment. The present invention has multiple water storage areas and corresponding independent treatment units, allowing the system to flexibly activate some or all of the treatment units according to the actual sewage volume, avoiding the resource waste and treatment failure problems of "a small horse pulling a big cart" or "a large horse pulling a small cart", perfectly adapting to fluctuations in rural population, and ensuring that the system workload remains moderate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic flow chart of the working steps of the modular rural sewage-biogas-fertilizer cogeneration system with micro-aerobic circulation according to an embodiment of the present invention; Figure 2 A partial cross-sectional view of a water distribution unit used in an embodiment of the present invention; Figure 3 This is a cross-sectional view showing the shape of the receiving cavity according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the bacterial colony symbiosis module used in an embodiment of the present invention; Figure 5 This is a partial cross-sectional view showing the positions of the first transmission groove, the second transmission groove and the transmission block according to an embodiment of the present invention; Figure 6 This is a partial cross-sectional view of an embodiment of the present invention showing the installation method of the packing layer.

[0017] Description of reference numerals: 10. Water distribution unit; 101. Distribution box; 102. Partition; 1021. Through slot; 1022. Water trough; 1023. Storage chamber; 103. Water storage area; 104. Water baffle; 105. First telescopic member; 106. Water inlet pipe; 107. Closing plate; 1071. Through hole; 108. Lifting plate; 109. Transmission sleeve; 110. Elastic member; 20. Colony symbiosis module; 201. Symbiosis tank; 2011. Transmission cavity; 2012. First transmission slot; 2013. Second transmission slot; 202. Filling rack; 203. Second telescopic member; 204. Roller; 205. Filling plate; 2051. Mounting cavity; 2052. Storage slot; 2053. Clamping block; 20531. Extrusion surface; 2054. Deformable member; 206. Filling layer; 207. Transmission rod; 208. Transmission block; 209. Linkage plate; 30. Airbag. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Please also refer to Figures 1 to 6 , the modular rural sewage-biogas-fertilizer co-production system based on micro-oxygen circulation of the present invention is described. A modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation includes a water distribution unit 10, multiple treatment units, and a cogeneration unit. The water distribution unit 10 includes a distribution box 101 and multiple partitions 102 fixed to the inner wall of the distribution box 101. The multiple partitions 102 divide the distribution box 101 into multiple water storage areas 103. The water storage areas 103 are set with preset water levels. The partitions 102 are provided with through grooves 1021 at the preset water level elevation to connect two adjacent water storage areas 103. The treatment units are connected to the water storage areas 103 in a one-to-one correspondence. Valves are provided at the connection points between the treatment units and the corresponding water storage areas 103. The treatment units sequentially perform hydrolysis and acidification treatment, micro-aerobic reaction treatment, and biological treatment on the sewage flowing out of the corresponding water storage areas 103. The cogeneration unit includes a gas collection module and a fertilizer production module. The gas collection module is used to collect biogas generated by the treatment units, and the fertilizer production module is used to convert excess sludge from the treatment units into biochar.

[0020] It should be noted that the sewage needs to be processed by a screen before entering the distribution box 101, and the water outlet of the screen flows through a concrete open channel to the water storage area 103 at the end; the gap of the screen is set to 5mm, and the large-diameter particles in the sewage are removed through the screen.

[0021] This embodiment provides a modular rural sewage-biogas-fertilizer cogeneration system based on microaerobic circulation. After being treated by a grid, sewage enters a distribution box 101. Multiple fixed partitions 102 within the distribution box 101 divide the space into several water storage areas 103. When the sewage level in a water storage area 103 at one end rises to a preset water level on the partitions 102, the sewage overflows into the adjacent water storage area 103 through slots 1021 on the partitions 102. Once sewage enters a water storage area 103, the corresponding valve in the water storage area 103 opens, allowing the sewage to flow from the water storage area 103 into the corresponding treatment unit. Within the treatment unit, the sewage undergoes hydrolysis and acidification, microaerobic reaction, and biological treatment. Simultaneously, the biogas generated by the microaerobic reaction is collected and stored by the gas collection module of the cogeneration unit. Excess sludge generated at each treatment stage is transported to the fertilizer production module and converted into biochar fertilizer through pyrolysis, ultimately achieving the synergistic cogeneration of sewage purification, biogas production, and fertilizer production.

[0022] Compared with the prior art, when the water level in a certain water storage area 103 reaches a preset level, sewage flows into the adjacent water storage area 103 through the trough 1021. When water begins to flow into the water storage area 103, the corresponding valve in the water storage area 103 is opened, allowing the sewage to enter the corresponding treatment unit for treatment. Integrating sewage treatment with biogas collection and sludge fertilizer production turns waste into treasure, solving the pollution problem while producing biogas energy and organic fertilizer, thus achieving a closed loop of treating waste with waste. The present invention has multiple water storage areas 103 and corresponding independent treatment units, allowing the system to flexibly activate some or all of the treatment units according to the actual amount of sewage, avoiding the waste of resources and treatment failure problems of "a small horse pulling a big cart" or "a big horse pulling a small cart", perfectly adapting to fluctuations in rural population, and ensuring that the system workload remains moderate.

[0023] In some embodiments, see Figure 2 and Figure 3 The bottom of the partition 102 is provided with a water channel 1022, and the inner wall of the water channel 1022 is provided with a receiving chamber 1023. The water distribution unit 10 also includes a water baffle 104 and a first telescopic member 105; the water baffle 104 is disposed in the receiving chamber 1023, and is slidably connected to the partition 102 in the vertical direction. The water baffle 104 has a first working position in which it is received in the receiving chamber 1023 and a second working position in which it blocks the water channel 1022; the first telescopic member 105 is fixedly connected between the partition 102 and the water baffle 104, and the first telescopic member 105 is telescopic in the vertical direction; the first telescopic member 105 enables the water baffle 104 to switch between the first working position and the second working position, and the first telescopic member 105 is a telescopic oil cylinder or a hydraulic cylinder.

[0024] When the water level in the water storage area 103 has not reached the preset water level, the first telescopic member 105 is in an extended state, so that the water baffle 104 is in the second working position; when the water level in the water storage area 103 reaches the preset water level, the first telescopic member 105 is in a retracted state, so that the water baffle 104 is in the first working position, thereby connecting the bottoms of the two adjacent water storage areas 103, thereby keeping the water levels in the connected water storage areas 103 consistent, and further keeping the workload of the processing units in the working state consistent.

[0025] In some embodiments, see Figure 2The water distribution unit 10 also includes a plurality of water inlet pipes 106, a plurality of sealing plates 107 and a transmission structure; the water inlet pipes 106 are connected one-to-one with the water storage area 103; the sealing plates 107 correspond one-to-one to the water inlet pipes 106, and the sealing plates 107 are slidably connected to the distribution box 101 along a first direction. The sealing plates 107 are provided with through holes 1071, and the sealing plates 107 have a first working state in which the water outlet end of the water inlet pipe 106 is aligned with the through hole 1071 and a second working state in which the water outlet end of the water inlet pipe 106 is misaligned with the through hole 1071; the transmission structure is arranged between the sealing plate 107 and the first telescopic member 105, so that the sealing plate 107 switches between the first working state and the second working state.

[0026] A water inlet connected to the water inlet pipe 106 is provided on the top wall of the distribution box 101; the transmission structure includes a lifting plate 108, a transmission sleeve 109 and an elastic member 110; the lifting plate 108 is arranged in the storage chamber 1023, and the lifting plate 108 is slidably connected to the partition 102 along the up and down directions; the transmission sleeve 109 is retracted and retracted along a first direction, one end of the transmission sleeve 109 is connected to the storage chamber 1023, and the other end is in a blocked state, and the end of the transmission sleeve 109 connected to the storage chamber 1023 is fixedly connected to the partition 102; the elastic member 110 is fixed between the sealing plate 107 and the distribution box 101, and the elastic member 110 has a pre-tightening force that makes the sealing plate 107 be in the second working state, and the elastic member 110 is a spring or a spring rod.

[0027] When the water level in the water storage area 103 does not reach the preset water level, the water storage area 103 adjacent to the water storage area 103 is in an inactive state; when the water level in the water storage area 103 reaches the preset water level, the water storage area 103 adjacent to the water storage area 103 is in an active state.

[0028] After the water storage area 103 is in the started state, the corresponding first telescopic member 105 is in the retracted state; during the retraction process of the first telescopic member 105, the first telescopic member 105 causes the lifting plate 108 to rise, so that the lifting plate 108 squeezes the air in the upper part of the storage chamber 1023, so that the air in the upper part of the storage chamber 1023 enters the transmission sleeve 109, so that the transmission sleeve 109 stretches and squeezes the sealing plate 107, so that the water inlet end of the water inlet pipe 106 is aligned with the through hole 1071, so that the sewage in the water inlet pipe 106 enters the corresponding water storage area 103, and the elastic member 110 is in the stretched state at this time; in the process of the first telescopic member 105 restoring the extended state, the first telescopic member 105 causes the lifting plate 108 to descend, and the elastic member 110 releases the elastic force to cause the transmission sleeve 109 to restore the contracted state, so that the sealing plate 107 moves so that the water inlet end of the water inlet pipe 106 is misaligned with the through hole 1071.

[0029] In some embodiments, see Figure 1The treatment unit includes a hydrolysis and acidification treatment module, a micro-aerobic reaction module and a bacterial symbiosis module 20. The hydrolysis and acidification treatment module is connected to the corresponding water storage area 103. The hydrolysis and acidification treatment is used to hydrolyze and acidify the sewage flowing out of the corresponding water storage area 103. The micro-aerobic reaction module is connected to the water outlet of the hydrolysis and acidification treatment module. The micro-aerobic reaction module performs aeration treatment on the sewage. The bacterial symbiosis module 20 is connected to the water outlet of the micro-aerobic reaction module. The bacterial symbiosis module 20 performs biological treatment on the sewage.

[0030] The cogeneration unit further includes a power generation module, which includes a generator and a waste heat recovery pipeline, and the waste heat recovery pipeline is connected to the micro-oxygen reaction module.

[0031] The gas collecting module includes a gas collecting hood corresponding to the micro-oxygen reaction module and a gas collecting tank connected to the gas collecting hood. The gas collecting hood is arranged on the top of the micro-oxygen reaction module, and the gas collecting tank is connected to the generator.

[0032] The hydrolysis and acidification treatment module includes a spiral solid-liquid separator, a hydrolysis and acidification tank, and a mixer arranged in the hydrolysis and acidification tank. The sewage flowing out of the water storage area 103 first enters the spiral solid-liquid separator, and then enters the hydrolysis and acidification tank after passing through the spiral solid-liquid separator.

[0033] The discharge port of the spiral solid-liquid separator is horizontally connected to the feed port at the top of the hydrolysis and acidification bin. The spiral solid-liquid separator is made of 304 stainless steel, with a spiral blade inclination angle of 15°, a rotation speed of 30rpm, and a separation efficiency of >90%. The spiral solid-liquid separator is equipped with a built-in pH online monitor (range 2-12, accuracy ±0.1), which is linked to the acidification bin mixer (power 1.5kW) to maintain the hydrolysis and acidification pH at 5.5-6.5.

[0034] The hydrolysis and acidification tank needs to be added with anaerobic sludge (MLSS=10g / L), which comes from the digester of the municipal sewage plant. The hydraulic retention time (HRT) of the hydrolysis and acidification tank is 8h, the volumetric load is 3kgCOD / m³·d, and the composite hydrolytic bacteria agent (including Clostridium and Bacteroides) is added at a dosage of 0.1%v / v. The decomposition rate of large molecular organic matter is increased by 40%.

[0035] The microaerobic reaction module includes a microaerobic reaction chamber, a water distributor and aeration plate located at the bottom of the chamber, and a triangular overflow weir at the end of the chamber. The specific layout of the water distributor and aeration plate is conventional in the art and will not be detailed in this application. The outlet of the hydrolysis and acidification chamber is connected to the water distributor via UPVC piping. A reflux pump is installed at the end of the microaerobic reaction chamber. The reflux pump has an adjustable flow rate of 0-5m³ / h and returns to the top of the hydrolysis and acidification chamber via a DN80 pipe.

[0036] The reflux pump uses a corrosion-resistant centrifugal pump (flow rate 0-5m³ / h, head 10m) equipped with a frequency converter (adjustment accuracy ±1%). The control logic: According to the COD value of the influent (300-600mg / L), the reflux ratio (10-50%) is dynamically adjusted according to the formula: R=0.2+0.005×(CODin−300).

[0037] The air source of the aeration plate comes from the air preheated by the waste heat recovery pipeline, and the outer wall of the micro-aerobic reaction chamber is surrounded by a stainless steel waste heat coil, which is also connected to the waste heat recovery pipeline to maintain the temperature of the micro-aerobic reaction chamber at 25-35℃.

[0038] Under microaerobic conditions, short-range nitrifying bacteria (Nitrosomonas) and methane-oxidizing bacteria (Methylococcaceae) coexist, simultaneously achieving COD degradation and methane emission reduction (N2O production is reduced by 60%); the microaerobic reaction chamber is equipped with three-stage baffles, which extend the hydraulic flow state to 12 hours, and the COD removal rate is >85%.

[0039] The top of the bacterial symbiosis module 20 is equipped with a liftable LED light source rack with a light intensity of 5000 lux. The water inlet of the bacterial symbiosis module 20 comes from the triangular overflow weir in the micro-aerobic reaction chamber. A guide plate is installed behind the triangular overflow weir. The guide plate has an inclination angle of 30° to prevent water impact from damaging the algae biofilm. The water outlet of the bacterial symbiosis module 20 is distributed to the ultraviolet disinfection pool through the triangular weir. With an irradiation dose of 30mJ / cm², the fecal coliform group inactivation rate is greater than 99.9%.

[0040] The gas collecting hood is installed on the top of the micro-aerobic reaction chamber. The gas in the gas collecting hood is first introduced into the steam-water separator to remove droplets, then passes through the biological desulfurization tower, and finally enters the biogas storage tank. The outlet of the biogas storage tank is connected to the generator through a pressure reducing valve.

[0041] In some embodiments, see Figure 1 The co-production unit also includes a sludge thickening tank, which is connected to the hydrolysis and acidification treatment module, the microaerobic reaction module and the bacterial colony symbiosis module 20.

[0042] The fertilizer making module includes a sludge pyrolysis furnace connected to the sludge concentration tank, and the sludge pyrolysis furnace is also connected to the waste heat recovery pipeline.

[0043] The hydrolysis and acidification chamber, micro-aerobic reaction chamber, and algae-film symbiosis module are all equipped with sludge discharge valves, which are connected to the sludge thickening tank through a DN150 steel pipe. The pumping equipment uses a screw pump to send the concentrated sludge into the sludge pyrolysis furnace. The pyrolysis product is biochar, which is output to the fertilizer packaging machine through a screw conveyor.

[0044] In some embodiments, see Figure 4 and Figure 6The colony symbiosis module 20 includes a symbiosis pool 201, an annular filling rack 202, a second telescopic member 203, multiple rollers 204, multiple filling plates 205 and multiple filling layers 206; the above-mentioned mud discharge valve is provided at the bottom of the symbiosis pool 201; the filling rack 202 is arranged in the symbiosis pool 201, and the filling rack 202 is slidably connected to the symbiosis pool 201 along the up and down directions; the second telescopic member 203 is telescopic along the up and down directions, and the second telescopic member 203 is fixed between the symbiosis pool 201 and the filling rack 202, and the second telescopic member 203 is a telescopic oil cylinder or a hydraulic cylinder; multiple rollers 204 are arranged at intervals around the central axis of the filling rack 202, and the filling plates 205 are rotatably connected to the filling rack 202, and the rollers 204 are rotated in the up and down directions; the filling plates 205 are fixed to the rollers 204 one by one; the filling layers 206 are arranged on the filling plates 205 one by one, and the filler is basalt fiber.

[0045] By controlling the extension and contraction of the second telescopic member 203, the filler rack 202 can be driven to slide up and down along the pool wall to adjust the immersion depth of all filler layers 206 and the biofilm thereon in the water. For example, part of the filler can be lifted out of the water at low load to reduce energy consumption and excessive aeration, or it can be completely immersed when biomass needs to be increased.

[0046] When the packing needs to be replaced, the second telescopic member 203 drives the packing rack 202 to completely separate from the symbiotic pool 201, so that the packing plate 205 is completely exposed. The staff rotates the packing plate 205 through the roller 204 so that the packing layer 206 faces outward, making it easier for the staff to replace it.

[0047] In some embodiments, see Figure 4 and Figure 5 The symbiotic pool 201 is provided with a plurality of transmission cavities 2011, and the transmission cavities 2011 correspond one to one with the rotating rollers 204. The inner wall of the transmission cavity 2011 is provided with a first transmission groove 2012 and a second transmission groove 2013. The first transmission groove 2012 extends in the up and down directions, and the second transmission groove 2013 is spirally opened. The first transmission groove 2012 and the second transmission groove 2013 are connected end to end.

[0048] The colony symbiosis module 20 also includes multiple transmission rods 207 and multiple transmission blocks 208; the transmission rods 207 are arranged one by one in the transmission cavity 2011, the transmission rods 207 and the roller 204 are transmission connected, and the transmission rods 207 and the roller 204 are transmission connected through a gear set; the transmission blocks 208 are fixed to the transmission rods 207 one by one, the transmission blocks 208 are slidingly adapted to the first transmission groove 2012, and the transmission blocks 208 are also slidingly adapted to the second transmission groove 2013.

[0049] Specifically, the bacterial colony symbiosis module 20 further includes a linkage plate 209 , and the top ends of the transmission rod 207 and the roller 204 are rotatably connected to the linkage plate 209 .

[0050] When adjusting the immersion depth of the biofilm, the transmission block 208 slides in the first transmission groove 2012. At this time, the roller 204 does not rotate, and the roller 204 only moves in the up and down directions. After the filling rack 202 is completely moved out of the sewage water surface, the transmission block 208 enters the second transmission groove 2013 from the first transmission groove 2012. At this time, the roller 204 rotates, and at the same time, the roller 204 moves in the up and down directions, thereby moving the filling rack 202 out of the symbiosis tank 201 and flipping the filling plate 205 outward are achieved synchronously, reducing the labor intensity of the staff.

[0051] In some embodiments, see Figure 6 The side of the filler plate 205 facing away from the rotating roller 204 is recessed inward to form an installation cavity 2051 for installing the filler. The inner wall of the installation cavity 2051 is provided with two oppositely arranged receiving grooves 2052. A card block 2053 is slidingly adapted in the receiving groove 2052. A deformable part 2054 is fixedly connected between the card block 2053 and the filler plate 205. The deformable part 2054 has a pre-tightening force that causes the card block 2053 to extend out of the receiving groove 2052. The deformable part 2054 is a spring or a spring rod.

[0052] An extrusion surface 20531 is formed on the inner side and the outer side of the end of the clamping block 2053 facing away from the deformable member 2054 .

[0053] The installation cavity 2051 provides a regular space for placing the packing layer 206. The clamping block 2053 automatically pops out under the pre-tightening force of the deformable part 2054, clamping the edge of the packing layer 206, realizing fast and firm tool-free installation and fixation, greatly simplifying the loading and unloading process of the packing, and is particularly suitable for rural operation and maintenance; at the same time, reliable mechanical clamping effectively prevents the packing layer 206 from loosening or falling off due to water impact during the processing process, thereby ensuring the processing effect and equipment safety.

[0054] In some embodiments, see Figure 6 An airbag 30 and a pneumatic component connected to the airbag 30 are provided in the receiving groove 2052. The pneumatic component is used to supply air to or exhaust air from the airbag 30. The pneumatic component is an air pump.

[0055] The airbag 30 is located in the storage groove 2052. As the airbag 30 is inflated, its volume increases, generating outward pressure, so that the block 2053 will not be retracted into the storage groove 2052, thereby preventing the block 2053 from being forced into the storage groove 2052 during operation, thereby preventing the filler from falling; when the filler needs to be replaced, the airbag 30 shrinks to avoid the entry of the block 2053.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation, characterized in that: include: A water distribution unit comprises a distribution box and a plurality of partitions fixed to the inner wall of the distribution box, wherein the plurality of partitions divide the distribution box into a plurality of water storage areas, wherein the water storage areas are provided with preset water levels, and the partitions are provided with through grooves at the preset water level elevations for connecting two adjacent water storage areas; A plurality of treatment units are connected to the water storage areas in a one-to-one correspondence, and valves are provided at the connection points between the treatment units and the corresponding water storage areas. The treatment units sequentially perform hydrolysis and acidification treatment, micro-aerobic reaction treatment, and biological treatment on the sewage flowing out of the corresponding water storage areas; as well as The co-production unit includes a gas collection module and a fertilizer production module. The gas collection module is used to collect the biogas generated by the processing unit, and the fertilizer production module is used to produce biochar from the excess sludge of the processing unit.

2. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 1, characterized in that: A water channel is provided at the bottom of the partition, and a receiving cavity is provided on the inner wall of the water channel; The water distribution unit also includes: a water baffle disposed in the receiving cavity, the water baffle being slidably connected to the partition in an up-and-down direction, the water baffle having a first working position for being received in the receiving cavity and a second working position for blocking the water channel; and The first telescopic member is fixed between the partition and the water baffle, and the first telescopic member is telescopic in the up-down direction; the first telescopic member enables the water baffle to switch between the first working position and the second working position.

3. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 2, characterized in that: The water distribution unit also includes: A plurality of water inlet pipes are connected one by one with the water storage areas; a plurality of sealing plates corresponding one to each of the water inlet pipes, the sealing plates being slidably connected to the distribution box along a first direction, the sealing plates being provided with through holes, the sealing plates being capable of a first working state in which the water outlet end of the water inlet pipe is aligned with the through hole, and a second working state in which the water outlet end of the water inlet pipe is misaligned with the through hole; and The transmission structure is provided between the closing plate and the first telescopic member, so that the closing plate can be switched between the first working state and the second working state.

4. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 3, characterized in that: The top wall of the distribution box is provided with a water inlet connected to the water inlet pipe; The transmission structure includes: A lifting plate is provided in the storage cavity, and the lifting plate is slidably connected to the partition along an up-down direction; A transmission sleeve is extended and retracted along the first direction, one end of the transmission sleeve is connected to the receiving cavity, the other end is in a blocked state, and the end of the transmission sleeve connected to the receiving cavity is fixedly connected to the partition; and An elastic member is fixedly connected between the sealing plate and the distribution box, and the elastic member has a pre-tightening force that enables the sealing plate to be in the second working state.

5. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 1, characterized in that: The treatment unit includes a hydrolysis and acidification treatment module, a microaerobic reaction module and a bacterial colony symbiosis module. The hydrolysis and acidification treatment module is connected to the corresponding water storage area. The hydrolysis and acidification treatment is used to hydrolyze and acidify the sewage flowing out of the corresponding water storage area. The microaerobic reaction module is connected to the water outlet of the hydrolysis and acidification treatment module. The microaerobic reaction module performs aeration treatment on the sewage. The bacterial colony symbiosis module is connected to the water outlet of the microaerobic reaction module. The bacterial colony symbiosis module performs biological treatment on the sewage. The co-generation unit further includes a power generation module, the power generation module includes a generator and a waste heat recovery pipeline, and the waste heat recovery pipeline is connected to the micro-oxygen reaction module; The gas collecting module includes a gas collecting cover corresponding to the micro-oxygen reaction module one by one and a gas collecting tank connected to the gas collecting cover. The gas collecting cover is arranged on the top of the micro-oxygen reaction module, and the gas collecting tank is connected to the generator.

6. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 5, characterized in that: The co-production unit further includes a sludge concentration tank, which is connected to the hydrolysis and acidification treatment module, the microaerobic reaction module and the bacterial colony symbiosis module; The fertilizer production module includes a sludge pyrolysis furnace connected to the sludge concentration tank, and the sludge pyrolysis furnace is also connected to the waste heat recovery pipeline.

7. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 5, characterized in that: The bacterial colony symbiosis module includes: Symbiotic pond; An annular filler frame is provided in the symbiotic pool, and the filler frame is slidably connected to the symbiotic pool in an up-down direction; a second telescopic member, telescopic along the up-down direction, the second telescopic member being fixedly connected between the symbiotic tank and the filling frame; A plurality of rollers are arranged at intervals around the central axis of the filling frame, the filling plate is rotatably connected to the filling frame, and the rollers have an up-down direction as a rotation axis; A plurality of filler plates are fixedly connected to the rotating rollers in a one-to-one correspondence; and A plurality of packing layers are arranged on the packing plate in a one-to-one correspondence.

8. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 7, characterized in that: The symbiotic pool is provided with a plurality of transmission cavities, each corresponding to each of the rotating rollers. The inner wall of the transmission cavity is provided with a first transmission groove and a second transmission groove. The first transmission groove extends in the vertical direction, and the second transmission groove is spirally provided. The first transmission groove and the second transmission groove are connected end to end. The bacterial colony symbiosis module further comprises: A plurality of transmission rods are provided in the transmission cavity in a one-to-one correspondence, and the transmission rods are in transmission connection with the rotating rollers; as well as A plurality of transmission blocks are fixedly connected to the transmission rod in a one-to-one correspondence. The transmission blocks are slidably fitted with the first transmission grooves, and the transmission blocks are also slidably fitted with the second transmission grooves.

9. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 7, characterized in that: The side of the filler plate facing away from the rotating roller is recessed inward to form an installation cavity for installing the filler. The inner wall of the installation cavity is provided with two oppositely arranged receiving grooves. A card block is slidingly adapted in the receiving groove. A deformable part is fixed between the card block and the filler plate. The deformable part has a pre-tightening force that causes the card block to extend out of the receiving groove.

10. The modular rural sewage-biogas-fertilizer cogeneration system based on micro-aerobic circulation according to claim 9, characterized in that: An airbag and a pneumatic component connected to the airbag are provided in the receiving groove, and the pneumatic component is used to supply air to or exhaust air from the airbag.

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