Domestic sewage denitrification and dephosphorization treatment process and equipment based on particle membrane

Abstract

The invention discloses a domestic sewage denitrification and dephosphorization treatment process and equipment based on a granular membrane, and relates to the technical field of sewage treatment. Comprising a septic tank, the water inlet pipe is connected with the septic tank; the water outlet pipe is connected with the septic tank; the biochemical pool is connected with the water outlet pipe; the treatment mechanism is arranged in the septic tank, the treatment mechanism comprises a partition plate, the partition plate is mounted in the septic tank, a first lifting rod is mounted in the partition plate, a moving assembly is arranged outside the first lifting rod, and the first lifting rod is used for controlling the moving assembly to go in and out of the septic tank; the arrangement mechanism is arranged in the biochemical pool, the arrangement mechanism comprises a second sliding block, a connecting assembly is installed at the top of the second sliding block, and the household sewage nitrogen and phosphorus removal treatment process and equipment based on the particle film achieve the purpose of improving the use efficiency of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a granular membrane-based domestic sewage denitrification and dephosphorization treatment process and equipment. Background Art

[0002] Aerobic granular sludge technology is a novel wastewater treatment technology characterized by high granular sludge biomass, long sludge age, low excess sludge production, rapid particle settling, efficient wastewater treatment, high organic load tolerance, strong shock load resistance, and strong tolerance to toxic and harmful substances. The formation mechanism of aerobic granular sludge is complex, involving physical, chemical, and biological interactions. The formation process is generally considered to be a phenomenon of microbial self-aggregation through various mechanisms under certain fluid dynamics, selective pressure, and other conditions.

[0003] Patent publication number CN108793644A discloses a sewage treatment device that improves the denitrification efficiency of sewage. By installing an internal inclined plate, sludge can be guided to converge, improving sludge sedimentation efficiency and reducing equipment modification costs. This structure provides sufficient sludge for subsequent dephosphorization and nitrogen removal processes, effectively improving the denitrification and phosphorus removal efficiency of the sewage treatment device and ensuring wastewater treatment effectiveness. However, when manually installing the rope packing assembly, multiple rope packing assemblies are prone to entanglement. Summary of the Invention

[0004] In order to overcome the problem that multiple rope-type filler assemblies are easily entangled when manually installing the rope-type filler assemblies, the present invention provides a granular membrane-based domestic sewage denitrification and dephosphorization treatment device, including a septic tank; a water inlet pipe connected to the septic tank; an outlet pipe connected to the septic tank; A biochemical pool connected to a water outlet pipe; A treatment mechanism, the treatment mechanism is arranged inside the septic tank, the treatment mechanism includes a partition, the partition is installed inside the septic tank, a first lifting rod is installed inside the partition, a moving component is arranged outside the first lifting rod, and the first lifting rod is used to control the moving component to enter and exit the septic tank; The arrangement mechanism is arranged inside the biochemical pool and includes a second slider, and a connecting component is installed on the top of the second slider.

[0005] Preferably, the processing mechanism further comprises: a first chamber, the first chamber being arranged inside the septic tank; a second chamber, the second chamber being disposed inside the septic tank; a third chamber, the third chamber being arranged inside the septic tank; A connecting pipe is installed inside the partition, and a plurality of connecting pipes are provided.

[0006] Preferably, the moving component comprises: a lifting frame connected to the telescopic end of the first lifting rod; a first slider, the first slider being slidably connected to the interior of the lifting frame; a first push rod, the first push rod being installed inside the lifting frame, and a telescopic end of the first push rod being connected to the first slider; an adjusting rod, wherein the adjusting rod is installed outside the first sliding block; A transverse plate is connected to the adjusting rod.

[0007] Preferably, the moving component further comprises: A semi-cylinder installed at the bottom of the horizontal plate; A central column, the central column being installed inside the semi-cylinder; A through hole, wherein the through hole is provided inside the semi-cylinder, and a plurality of the through holes are provided; The wave rod is installed at the bottom of the transverse plate. There are multiple wave rods, which are evenly arranged.

[0008] Preferably, the arrangement mechanism further comprises: A slideway is provided inside the biochemical pool, and the second sliding block is slidably connected to the inside of the slideway; a second push rod, the second push rod being mounted inside the slideway, the telescopic end of the second push rod being connected to the second slider; An aeration pipeline is installed inside the biochemical pool.

[0009] Preferably, the arrangement mechanism further comprises: a first aerobic zone, wherein the first aerobic zone is arranged inside the biochemical pool; a second aerobic zone, wherein the second aerobic zone is arranged inside the biochemical pool; A third aerobic zone, wherein the third aerobic zone is arranged inside the biochemical pool; The sedimentation zone is arranged inside the biochemical pool.

[0010] Preferably, the connection assembly comprises: a third push rod, the third push rod being mounted outside the second slider; an arc-shaped plate installed above the second slider; a channel, wherein the channel is opened inside the curved plate; An electric push plate is installed inside the channel, and two electric push plates are provided and are symmetrically arranged.

[0011] Preferably, the connection assembly further comprises: a second lifting rod, the second lifting rod being installed at the bottom of the curved plate; a cross plate connected to the telescopic end of the second lifting rod; A fixed cylinder, the fixed cylinder being installed on the top of the cross plate; A fixing ring, the fixing ring being mounted on the top of the fixing cylinder; The insertion rod is installed at the bottom of the cross plate, and two insertion rods are provided and symmetrically arranged.

[0012] The present invention provides a granular membrane-based domestic sewage denitrification and dephosphorization treatment process, comprising the following steps: S1. Domestic sewage first enters the first chamber of a three-compartment septic tank through a pipe. Solids with a specific gravity greater than 1.1 accumulate at the bottom, forming a sludge bed. Grease or organic matter with a specific gravity less than 0.95 floats to the surface. The clear water in the middle layer with a SS content less than 50 mg / L flows by gravity to the second chamber due to the hydraulic gradient. The anaerobic reaction continues in the second chamber, and the newly formed scum and settled sludge are separated for a second time. The sewage then enters the third chamber and enters the biochemical zone through the third chamber. S2. The wastewater flows through multiple aerobic units in the biochemical zone. Utilizing the synergistic effect of granular sludge and biofilm, efficient organic matter degradation is achieved. Ammonia nitrogen is converted into nitrogen gas and removed through the nitrification-denitrification process. Total phosphorus is effectively removed through the built-in electrolytic phosphorus removal device. The biochemical effluent then enters the sedimentation tank for solid-liquid separation, and the supernatant naturally overflows to the advanced treatment unit. S3. In the deep treatment unit, ozone, electrocatalytic oxidation and ultraviolet radiation synergistic process are used to strengthen the treatment of water bodies, achieve deep purification of COD and ammonia nitrogen, and simultaneously complete decolorization and disinfection. Finally, the qualified effluent overflows into the clear water tank.

[0013] The present invention provides a process and equipment for denitrification and dephosphorization of domestic wastewater based on granular membranes. It has the following beneficial effects: 1. This granular membrane-based domestic wastewater denitrification and dephosphorization treatment process and equipment utilizes a placement mechanism to isolate and install the rope packing assembly within the first aerobic zone. By adjusting the positions of multiple second sliders, the positions of multiple connecting assemblies are adjusted, allowing each connecting assembly and rope packing assembly to be installed separately. The second slider being installed is positioned away from the other second sliders to prevent entanglement of multiple rope packing assemblies during installation. A second lifting rod is used to control the landing of one end of the rope packing assembly to prevent it from hanging within the first aerobic zone and interfering with the installation of other rope packing assemblies.

[0014] 2. This granular membrane-based domestic wastewater denitrification and dephosphorization process and equipment utilizes a treatment mechanism to unclog multiple connecting pipes at different heights. Before and after use, the horizontal and vertical electric push rods within the adjustment levers are adjusted to bring the semi-cylinder closer to the connecting pipes. The central column within the semi-cylinder gradually enters the connecting pipes, pushing impurities in the connecting pipes into the next chamber and preventing clogging. During operation, the semi-cylinder remains outside the connecting pipe opening, and the multiple wave-shaped rods intercept large particles.

[0015] 3. This granular membrane-based domestic wastewater denitrification and dephosphorization treatment process and equipment utilizes a three-compartment septic tank, treating wastewater in the first, second, and third chambers. Solids with a specific gravity greater than 1.1 accumulate at the bottom of the first chamber, forming a sludge bed. Oils and organic matter with a specific gravity less than 0.95 float to the surface. The clarified water in the middle layer, with a SS content less than 50 mg / L, flows by hydraulic gradient to the second chamber, where anaerobic reactions continue, separating the newly formed scum from the settled sludge. The wastewater then enters the third chamber, which temporarily stores the sediment and wastewater free of pathogens and insect eggs.

[0016] 4. This granular membrane-based domestic wastewater denitrification and dephosphorization process and equipment utilizes a biochemical tank, utilizing a primary aerobic zone, a secondary aerobic zone, a tertiary aerobic zone, and a sedimentation zone to treat wastewater. Organic matter in the wastewater is degraded by the dual action of the granular sludge and biofilm, while ammonia nitrogen undergoes nitrification and denitrification, ultimately converting it into nitrogen gas and removing it. The nitrogen gas then flows into the sedimentation zone, where the supernatant naturally overflows into the clear water tank. Total phosphorus is effectively removed by the electrolytic descaling device in the tertiary aerobic zone. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flowchart of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is another perspective schematic diagram of the present invention; Figure 4 It is a schematic diagram of the processing mechanism structure of the present invention; Figure 5 This is a schematic diagram of the structure of the mobile component of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the structure at A in the middle; Figure 7 It is a schematic diagram of the arrangement structure of the present invention; Figure 8 This is a schematic diagram of the connection assembly structure of the present invention; Figure 9 For the present invention Figure 8Schematic diagram of the structure at point B.

[0018] In the figure: 1. septic tank; 2. water inlet pipe; 3. treatment mechanism; 301. partition; 302. first lifting rod; 303. moving assembly; 3031. lifting frame; 3032. first slider; 3033. first push rod; 3034. adjusting rod; 3035. horizontal plate; 3036. semi-cylinder; 3037. center column; 3038. through hole; 3039. wave rod; 304. first chamber; 305. second chamber; 306. third chamber; 307. connecting pipe; 4. outlet pipe; 5. Tank; 6. Arrangement mechanism; 601. Slide; 602. Second push rod; 603. Second slider; 604. Connecting assembly; 6041. Third push rod; 6042. Arc plate; 6043. Channel; 6044. Electric push plate; 6045. Second lifting rod; 6046. Cross plate; 6047. Fixed cylinder; 6048. Fixed ring; 6049. Insert rod; 605. First aerobic zone; 606. Second aerobic zone; 607. Third aerobic zone; 608. Aeration pipeline; 609. Sedimentation zone. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0020] like Figures 1-9 As shown, the present invention provides a technical solution: comprising a septic tank 1, the septic tank 1 is configured as a three-compartment septic tank 1, the septic tank 1 is linked to a submersible pump p-001 through a float level gauge, and starts high and stops low to achieve water inlet operation; A water inlet pipe 2, the water inlet pipe 2 is connected to the septic tank 1; A water outlet pipe 4 is connected to the septic tank 1; The biochemical pool 5 is connected to the outlet pipe 4. The biochemical pool 5 is provided with a DO probe to control the aeration volume. The bottom of the biochemical pool 5 is provided with a sludge collection bucket for regular sludge discharge. The sludge discharge is linked to the solenoid valve for timed sludge discharge. The processing mechanism 3 is arranged inside the septic tank 1. The processing mechanism 3 includes a partition 301. The partition 301 is installed inside the septic tank 1. A first lifting rod 302 is installed inside the partition 301. The first lifting rod 302 is configured as an electric push rod. A moving component 303 is provided outside the first lifting rod 302. The first lifting rod 302 is used to control the moving component 303 to enter and exit the septic tank 1. The arrangement mechanism 6 is arranged inside the biochemical pool 5 and includes a second slider 603 . A connecting component 604 is installed on the top of the second slider 603 . There are four second sliders 603 and four connecting components 604 .

[0021] Before using the equipment, adjust the arrangement mechanism 6 and install the rope-type filler to be used in the biochemical process. When the equipment is in use, domestic sewage generated by the household enters the septic tank 1 through the pipe. After being treated by the septic tank 1 and the treatment mechanism 3, the effluent from the septic tank 1 enters the biochemical area, where the sewage is treated.

[0022] The processing mechanism 3 also includes: A first chamber 304, the first chamber 304 is arranged inside the septic tank 1; The second chamber 305 is provided inside the septic tank 1; The third chamber 306 is provided inside the septic tank 1. The first chamber 304, the second chamber 305 and the third chamber 306 constitute three septic tanks 1; The connecting pipe 307 is installed inside the partition 301 , and a plurality of connecting pipes 307 are provided.

[0023] Domestic sewage first enters the first chamber 304 of the three-compartment septic tank 1 through a pipeline. Solids with a specific gravity greater than 1.1 accumulate at the bottom, forming a sludge bed. Grease and organic matter with a specific gravity less than 0.95 float to the surface. The clear water in the middle layer, with a SS content less than 50 mg / L, flows by gravity to the second chamber 305 due to the hydraulic gradient. Anaerobic reactions continue in the second chamber 305, and newly formed scum and settled sludge are separated again. The sewage then enters the third chamber 306. After treatment in the three-compartment septic tank 1, the effluent enters the biochemical zone.

[0024] The mobile component 303 includes: A lifting frame 3031 , the lifting frame 3031 is connected to the telescopic end of the first lifting rod 302 ; A first slider 3032 , which is slidably connected to the interior of the lifting frame 3031 ; A first push rod 3033 is installed inside the lifting frame 3031. The telescopic end of the first push rod 3033 is connected to the first slider 3032. The first push rod 3033 is configured as an electric push rod; An adjusting rod 3034 is installed outside the first slider 3032 and is composed of a horizontal electric push rod and a vertical electric push rod; The horizontal plate 3035 is connected to the adjustment rod 3034 and is connected to the electric push rod in the vertical direction; Semi-cylinder 3036, semi-cylinder 3036 is installed at the bottom of horizontal plate 3035; Central column 3037, central column 3037 is installed inside the semi-cylinder 3036; A through hole 3038 is provided inside the semi-cylinder 3036 , and a plurality of through holes 3038 are provided; The wave rod 3039 is installed at the bottom of the horizontal plate 3035. There are multiple wave rods 3039, which are evenly arranged.

[0025] Before using the device, the first push rod 3033 is activated to the corresponding stroke, and the first push rod 3033 drives the first slider 3032 to slide in the lifting frame 3031 until the semi-cylinder 3036 is above the connecting tube 307. The horizontal electric push rod in the adjusting rod 3034 is activated to move the semi-cylinder 3036 away from the first slider 3032. Then, the vertical electric push rod in the adjusting rod 3034 is activated to move the semi-cylinder 3036 downward. According to the position of the connecting tube 307, the horizontal electric push rod in the adjusting rod 3034 is adjusted to move the semi-cylinder 3036 closer to the connecting tube 307. The central column 3037 in the semi-cylinder 3036 gradually enters the connecting tube 307, pushing impurities in the connecting tube 307 into the next chamber to prevent the connecting tube 307 from being blocked. At this time, the semi-cylinder 3036 is completely attached to the partition 301.

[0026] Then, the horizontal electric push rod in the adjusting rod 3034 is adjusted to move the semi-cylinder 3036 away from the partition 301, thereby separating the central column 3037 from the connecting tube 307. At this time, the open end of the connecting tube 307 is still in the semi-cylinder 3036.

[0027] As sewage enters first chamber 304 of septic tank 1, large impurities are trapped outside wave bars 3039 when the volume of sewage is high. Solids with a specific gravity greater than 1.1 (sand and parasite eggs) gradually accumulate at the bottom, forming a sludge bed. Grease and organic matter with a specific gravity less than 0.95 float to the surface. The sludge and scum undergo a primary anaerobic reaction at an SRT of 60 days. The clarified water in the middle layer, with a SS content of less than 50 mg / L, flows through through-holes 3038 in semi-cylinder 3036 via a hydraulic gradient to connecting pipe 307, where it then flows to second chamber 305.

[0028] Anaerobic reactions continue in the second chamber 305. At an HRT of no less than 20 days, residual organic matter is converted by methanogens into CH4 and CO2, and parasite eggs are inactivated due to the anoxic environment and biological antagonism. Simultaneously, new scum and settled sludge undergo a secondary separation, and the wastewater enters the third chamber 306 via connecting pipe 307.

[0029] The organic matter in the third compartment of septic tank 1 has been fully decomposed, and pathogens and parasite eggs have been largely eliminated. The third chamber 306 primarily serves to temporarily store sediment and the sterilized wastewater. After treatment in the three-compartment septic tank 1, the effluent enters the biochemical zone via a float level gauge and submersible pump P-001, operating at high start and low stop. An overflow port is located at the top of the biochemical zone, and excess water flows back to septic tank 1 through a return pipe.

[0030] By installing a processing mechanism 3, multiple connecting pipes 307 at different heights are cleared. Before and after use, the horizontal and vertical electric push rods in the adjustment rod 3034 are adjusted to bring the semi-cylinder 3036 closer to the connecting pipe 307. The central column 3037 in the semi-cylinder 3036 gradually enters the connecting pipe 307, pushing impurities in the connecting pipe 307 into the next chamber, preventing blockage of the connecting pipe 307. When the device is in use, the semi-cylinder 3036 is located outside the pipe opening of the connecting pipe 307, and the multiple wave rods 3039 intercept large particles.

[0031] The arrangement mechanism 6 further comprises: The slide 601 is provided inside the biochemical pool 5, and the second slider 603 is slidably connected to the inside of the slide 601; A second push rod 602 is installed inside the slide 601. The telescopic end of the second push rod 602 is connected to the second slider 603. The second push rod 602 is configured as an electric push rod; Aeration pipeline 608, aeration pipeline 608 is installed inside the biochemical pool 5; The first aerobic zone 605 is arranged inside the biochemical pool 5. From top to bottom, the first aerobic zone 605 comprises AB activated sludge, a rope filler assembly, and a polyurethane foam filler assembly; The second aerobic zone 606 is arranged inside the biochemical pool 5, and a suspended filler is arranged in the second aerobic zone 606; The third aerobic zone 607 is arranged inside the biochemical pool 5. The third aerobic zone 607 is equipped with an electrolytic dephosphorization device. The electrolytic device is linked with a submersible pump and starts and stops synchronously. A suspended filler is set in the third aerobic zone 607. The sedimentation area 609 is arranged inside the biochemical pool 5 .

[0032] The biochemical zone utilizes the S-MBBR process, and is a solid-liquid mixture of filler, biofilm, and granular sludge. Wastewater from the biochemical zone flows sequentially through the aerobic zones: the first aerobic zone 605, the second aerobic zone 606, and the third aerobic zone 607. Organic matter in the wastewater is degraded by the dual action of the granular sludge and biofilm, and ammonia nitrogen undergoes nitrification and denitrification, ultimately converting it into nitrogen gas. The wastewater then flows into the sedimentation zone 609. The supernatant from the sedimentation zone 609 naturally overflows into the clear water tank. Total phosphorus is effectively removed by the electrolytic descaling device in the third aerobic zone 607. The aerobic zone effluent overflows into the advanced treatment zone. The advanced treatment unit provides secondary water purification. An aluminum-based ozone catalyst rapidly decomposes ozone to form highly oxidizing hydroxyl radicals, which attack organic matter. After the catalytic ozone reaction, the effluent flows through the bottom into the inclined plate sedimentation tank for sludge-water separation. The supernatant then flows by gravity into the sedimentation zone 609.

[0033] By controlling the aeration system and selective pressures such as DO, the detached biofilm and flocs in the biochemical zone spontaneously form granular sludge due to the friction and collision between the filler, air, and water. From the outside in, the granules form aerobic, anoxic, and anaerobic microenvironments, allowing heterotrophic bacteria, nitrifying bacteria, and denitrifying bacteria to operate in their respective niches, facilitating simultaneous nitrification and denitrification, as well as short-range nitrification and denitrification. The biochemical zone achieves a synergistic effect, with both granular sludge and biofilm sludge, effectively and rapidly degrading most pollutants. This results in improved overall sewage treatment capacity and effectiveness compared to pre-transformation levels.

[0034] The connection component 604 includes: A third push rod 6041 is installed outside the second slider 603. The third push rod 6041 is configured as an electric push rod. There are multiple third push rods 6041 for connecting multiple second sliders 603. The curved plate 6042 is installed above the second slider 603; Channel 6043, which is provided inside the curved plate 6042; An electric push plate 6044 is installed inside the channel 6043. Two electric push plates 6044 are provided and are symmetrically arranged. A friction strip is provided on the outside of the electric push plates 6044. A second lifting rod 6045 is installed at the bottom of the arc plate 6042 and is configured as an electric push rod; A cross plate 6046 connected to the telescopic end of the second lifting rod 6045; Fixed cylinder 6047, fixed cylinder 6047 is installed on the top of cross plate 6046; A fixing ring 6048 is installed on the top of the fixing cylinder 6047; Insertion rod 6049, the insertion rod 6049 is installed at the bottom of the cross plate 6046, and two insertion rods 6049 are provided and are symmetrically arranged.

[0035] Before installing the rope packing assembly, adjust the stroke of the second push rod 602 and the third push rod 6041 so that the second slider 603 being installed is farther away from the other uninstalled second sliders 603. Then manually connect one end of the rope packing assembly to the fixing ring 6048. Holding the other end of the rope packing assembly, activate the second lifting rod 6045, which drives the cross plate 6046, fixing cylinder 6047, fixing ring 6048, and insertion rod 6049 downward until the insertion rod 6049 lands at the bottom of the first aerobic zone 605. Then activate the electric push plates 6044 on both sides, and the friction strips on the outside of the two electric push plates 6044 clamp and secure the other end of the rope packing assembly.

[0036] Then, the strokes of the second push rod 602 and the third push rod 6041 are adjusted, and each rope filler assembly is isolated and installed in turn.

[0037] By installing the arrangement mechanism 6, the rope packing assemblies in the first aerobic zone 605 are isolated and installed. By adjusting the positions of the multiple second sliders 603, the positions of the multiple connecting assemblies 604 are adjusted, allowing each connecting assembly 604 and rope packing assembly to be installed separately. The second slider 603 being installed is kept away from the other second sliders 603 to prevent the rope packing assemblies from becoming entangled during installation. A second lifting rod 6045 is used to control one end of the rope packing assembly to the ground, preventing it from hanging in the first aerobic zone 605 and interfering with the installation of other rope packing assemblies.

[0038] Working Principle: Before using the equipment, install the rope packing assembly in the first aerobic zone 605. Before installing the rope packing assembly, adjust the stroke of the second push rod 602 and the third push rod 6041 so that the second slider 603 being installed is at a greater distance from the other second sliders 603 that are not installed. Then, manually connect one end of the rope packing assembly to the fixing ring 6048. Holding the other end of the rope packing assembly, activate the second lifting rod 6045. The second lifting rod 6045 drives the cross plate 6046, the fixing cylinder 6047, the fixing ring 6048, and the insertion rod 6049 downward until the insertion rod 6049 falls to the bottom of the first aerobic zone 605. The electric push plates 6044 on both sides are activated, and the friction strips on the outside of the two electric push plates 6044 clamp the other end of the rope packing assembly.

[0039] Then, the strokes of the second push rod 602 and the third push rod 6041 are adjusted, and each rope filler assembly is isolated and installed in turn.

[0040] Subsequently, the first push rod 3033 is activated to the corresponding stroke, and the first push rod 3033 drives the first slider 3032 to slide in the lifting frame 3031 until the semi-cylinder 3036 is above the connecting tube 307. The horizontal electric push rod in the adjusting rod 3034 is activated to move the semi-cylinder 3036 away from the first slider 3032. Then, the vertical electric push rod in the adjusting rod 3034 is activated to move the semi-cylinder 3036 downward. According to the position of the connecting tube 307, the horizontal electric push rod in the adjusting rod 3034 is adjusted to move the semi-cylinder 3036 closer to the connecting tube 307. The central column 3037 in the semi-cylinder 3036 gradually enters the connecting tube 307, pushing the impurities in the connecting tube 307 into the next chamber to prevent the connecting tube 307 from being blocked. At this time, the semi-cylinder 3036 is completely attached to the partition 301.

[0041] Then, the horizontal electric push rod in the adjusting rod 3034 is adjusted to move the semi-cylinder 3036 away from the partition 301, thereby separating the central column 3037 from the connecting tube 307. At this time, the open end of the connecting tube 307 is still in the semi-cylinder 3036.

[0042] Domestic sewage generated by the household first enters the first chamber 304 of the three-compartment septic tank 1 through a pipe. When the amount of sewage is large, large particles of impurities in the sewage are blocked outside the wave rod 3039.

[0043] Solids with a specific gravity greater than 1.1 (settled sand, parasite eggs) gradually accumulate at the bottom, forming a sludge bed. Grease and organic matter with a specific gravity less than 0.95 float to the surface. The sludge and scum undergo a primary anaerobic reaction at an SRT of 60 days. The clarified water in the middle layer, with a SS content of less than 50 mg / L, flows through the through-holes 3038 in the semi-cylinder 3036 via the hydraulic gradient into the connecting pipe 307, and then through the connecting pipe 307 into the second chamber 305.

[0044] Anaerobic reactions continue in the second chamber 305. At an HRT of no less than 20 days, residual organic matter is converted by methanogens into CH4 and CO2, and parasite eggs are inactivated due to the anoxic environment and biological antagonism. Simultaneously, new scum and settled sludge undergo a secondary separation, and the wastewater enters the third chamber 306 via connecting pipe 307.

[0045] The organic matter in the third compartment of septic tank 1 has been fully decomposed, and pathogens and parasite eggs have been largely eliminated. The third chamber 306 primarily serves to temporarily store sediment and the sterilized wastewater. After treatment in the three-compartment septic tank 1, the effluent enters the biochemical zone via a float level gauge and submersible pump P-001, operating at high start and low stop. An overflow port is located at the top of the biochemical zone, and excess water flows back to septic tank 1 through a return pipe.

[0046] Wastewater from the biochemical zone flows sequentially through the aerobic zones: the first aerobic zone 605, the second aerobic zone 606, and the third aerobic zone 607. Organic matter in the wastewater is degraded by the dual action of granular sludge and biofilm, and ammonia nitrogen undergoes nitrification and denitrification, ultimately converting it into nitrogen gas for removal. The wastewater then flows into the sedimentation zone 609. The supernatant from the sedimentation zone 609 naturally overflows into the clear water tank. Total phosphorus is effectively removed by the electrolytic descaling device in the third aerobic zone 607. The aerobic zone effluent overflows into the advanced treatment zone. The advanced treatment unit performs a secondary purification of the water. An aluminum-based ozone catalyst rapidly decomposes ozone to form highly oxidizing hydroxyl radicals, which attack organic matter. After the catalytic ozone reaction, the effluent flows through the bottom into the inclined plate sedimentation tank for sludge-water separation. The supernatant then flows by gravity into the sedimentation zone 609.

[0047] By controlling the aeration system and selective pressures such as DO, the detached biofilm and flocs in the biochemical zone spontaneously form granular sludge due to the friction and collision between the filler, air, and water. From the outside in, the granules form aerobic, anoxic, and anaerobic microenvironments, allowing heterotrophic bacteria, nitrifying bacteria, and denitrifying bacteria to operate in their respective niches, facilitating simultaneous nitrification and denitrification, as well as short-range nitrification and denitrification. The biochemical zone achieves a synergistic effect, with both granular sludge and biofilm sludge, effectively and rapidly degrading most pollutants. This results in improved overall sewage treatment capacity and effectiveness compared to pre-transformation levels.

[0048] The present invention provides a granular membrane-based domestic sewage denitrification and dephosphorization treatment process, comprising the following steps: S1. Domestic sewage first enters the first chamber of a three-compartment septic tank through a pipe. Solids with a specific gravity greater than 1.1 accumulate at the bottom, forming a sludge bed. Grease or organic matter with a specific gravity less than 0.95 floats to the surface. The clear water in the middle layer with a SS content less than 50 mg / L flows by gravity to the second chamber due to the hydraulic gradient. The anaerobic reaction continues in the second chamber, and the newly formed scum and settled sludge are separated for a second time. The sewage then enters the third chamber and enters the biochemical zone through the third chamber. S2. The wastewater flows through multiple aerobic units in the biochemical zone. Utilizing the synergistic effect of granular sludge and biofilm, efficient organic matter degradation is achieved. Ammonia nitrogen is converted into nitrogen gas and removed through the nitrification-denitrification process. Total phosphorus is effectively removed through the built-in electrolytic phosphorus removal device. The biochemical effluent then enters the sedimentation tank for solid-liquid separation, and the supernatant naturally overflows to the advanced treatment unit. S3. In the deep treatment unit, ozone, electrocatalytic oxidation and ultraviolet radiation synergistic process are used to strengthen the treatment of water bodies, achieve deep purification of COD and ammonia nitrogen, and simultaneously complete decolorization and disinfection. Finally, the qualified effluent overflows into the clear water tank.

[0049] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A granular membrane-based domestic sewage denitrification and dephosphorization treatment device, comprising a septic tank (1), characterized in that: A water inlet pipe (2), the water inlet pipe (2) being connected to the septic tank (1); A water outlet pipe (4), the water outlet pipe (4) being connected to the septic tank (1); A biochemical pool (5), wherein the biochemical pool (5) is connected to the water outlet pipe (4); A processing mechanism (3), the processing mechanism (3) is arranged inside the septic tank (1), the processing mechanism (3) comprises a partition (301), the partition (301) is installed inside the septic tank (1), a first lifting rod (302) is installed inside the partition (301), a moving component (303) is arranged outside the first lifting rod (302), and the first lifting rod (302) is used to control the moving component (303) to enter and exit the septic tank (1); An arrangement mechanism (6) is provided inside the biochemical pool (5), and the arrangement mechanism (6) comprises a second slider (603), and a connection assembly (604) is installed on the top of the second slider (603).

2. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 1 is characterized in that: The processing mechanism (3) further comprises: A first chamber (304), the first chamber (304) being arranged inside the septic tank (1); A second chamber (305), the second chamber (305) being arranged inside the septic tank (1); A third chamber (306), the third chamber (306) being arranged inside the septic tank (1); A connecting pipe (307) is installed inside the partition (301), and a plurality of connecting pipes (307) are provided.

3. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 1, characterized in that: The mobile component (303) includes: A lifting frame (3031), the lifting frame (3031) is connected to the telescopic end of the first lifting rod (302); A first slider (3032), the first slider (3032) being slidably connected to the interior of the lifting frame (3031); A first push rod (3033), the first push rod (3033) is installed inside the lifting frame (3031), and the telescopic end of the first push rod (3033) is connected to the first sliding block (3032); an adjusting rod (3034), the adjusting rod (3034) being mounted outside the first slider (3032); A transverse plate (3035) is connected to the adjusting rod (3034).

4. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 3, characterized in that: The mobile component (303) further comprises: A semi-cylinder (3036), wherein the semi-cylinder (3036) is mounted on the bottom of the horizontal plate (3035); A central column (3037), the central column (3037) being installed inside the semi-cylinder (3036); A through hole (3038), wherein the through hole (3038) is provided inside the semi-cylinder (3036), and a plurality of the through holes (3038) are provided; A wave rod (3039) is installed at the bottom of the transverse plate (3035). A plurality of wave rods (3039) are provided and are evenly arranged.

5. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 1, characterized in that: The arrangement mechanism (6) further comprises: A slideway (601), wherein the slideway (601) is provided inside the biochemical pool (5), and the second slider (603) is slidably connected inside the slideway (601); a second push rod (602), the second push rod (602) being installed inside the slideway (601), the telescopic end of the second push rod (602) being connected to the second slider (603); An aeration pipeline (608), wherein the aeration pipeline (608) is installed inside the biochemical pool (5).

6. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 5, characterized in that: The arrangement mechanism (6) further comprises: A first aerobic zone (605), wherein the first aerobic zone (605) is arranged inside the biochemical pool (5); A second aerobic zone (606), wherein the second aerobic zone (606) is arranged inside the biochemical pool (5); A third aerobic zone (607), wherein the third aerobic zone (607) is arranged inside the biochemical pool (5); The sedimentation zone (609) is arranged inside the biochemical pool (5).

7. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 1, characterized in that: The connection component (604) includes: a third push rod (6041), the third push rod (6041) being mounted outside the second sliding block (603); An arc-shaped plate (6042), the arc-shaped plate (6042) being installed above the second slider (603); a channel (6043), wherein the channel (6043) is opened inside the curved plate (6042); An electric push plate (6044) is installed inside the channel (6043). Two electric push plates (6044) are provided and are symmetrically arranged.

8. The granular membrane-based domestic sewage denitrification and dephosphorization treatment equipment according to claim 7, characterized in that: The connection component (604) further includes: a second lifting rod (6045), the second lifting rod (6045) being installed at the bottom of the curved plate (6042); A cross plate (6046), the cross plate (6046) being connected to the telescopic end of the second lifting rod (6045); A fixed cylinder (6047), the fixed cylinder (6047) being mounted on top of the cross plate (6046); A fixing ring (6048), the fixing ring (6048) being mounted on the top of the fixing cylinder (6047); An insertion rod (6049) is installed at the bottom of the cross plate (6046). Two insertion rods (6049) are provided and are symmetrically arranged.

9. A process for denitrification and dephosphorization of domestic sewage based on granular membrane, characterized in that: The following steps are involved: S1. Domestic sewage first enters the first chamber of a three-compartment septic tank through a pipe. Solids with a specific gravity greater than 1.1 accumulate at the bottom, forming a sludge bed. Grease or organic matter with a specific gravity less than 0.95 floats to the surface. The clear water in the middle layer with a SS content less than 50 mg / L flows by gravity to the second chamber due to the hydraulic gradient. The anaerobic reaction continues in the second chamber, and the newly formed scum and settled sludge are separated for a second time. The sewage then enters the third chamber and enters the biochemical zone through the third chamber. S2. The wastewater flows through multiple aerobic units in the biochemical zone. Utilizing the synergistic effect of granular sludge and biofilm, efficient organic matter degradation is achieved. Ammonia nitrogen is converted into nitrogen gas and removed through the nitrification-denitrification process. Total phosphorus is effectively removed through the built-in electrolytic phosphorus removal device. The biochemical effluent then enters the sedimentation tank for solid-liquid separation, and the supernatant naturally overflows to the advanced treatment unit. S3. In the deep treatment unit, ozone, electrocatalytic oxidation and ultraviolet radiation synergistic process are used to strengthen the treatment of water bodies, achieve deep purification of COD and ammonia nitrogen, and simultaneously complete decolorization and disinfection. Finally, the qualified effluent overflows into the clear water tank.

Images