Anaerobic ammonia oxidation coupled double-layer granular sludge nitrogen and phosphorus removal reactor and operation method

Abstract

The invention discloses an anaerobic ammonia oxidation coupled double-layer granular sludge nitrogen and phosphorus removal reactor and an operation method, the reactor comprises a reactor cylindrical shell which vertically extends and is placed with an upward opening, and a nitrogen removal supporting partition plate, a mass transfer supporting partition plate and a phosphorus removal supporting partition plate which are horizontally arranged are sequentially fixed in the reactor cylindrical shell from bottom to top; the interior of the reactor cylindrical shell is sequentially divided into a sewage input chamber, a denitrification reaction chamber, a mass transfer isolation chamber and a phosphorus removal reaction chamber from bottom to top; a sewage input distribution ring shell is arranged around the position, close to the bottom, of the outer side of the reactor barrel shell, and the inner side of the sewage input distribution ring shell is communicated with the sewage input cavity through a plurality of sewage main input pipes; according to the reactor, function division and space coupling are carried out on a treatment process, the whole reactor is vertically divided into three main functional areas, namely, denitrification, mass transfer isolation and phosphorus removal, a co-treatment process of'autotrophic nitrogen removal-biological phosphorus removal 'is completed in the same reactor, and process linkage is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to an anaerobic ammonia oxidation coupled double-layer granular sludge denitrification and phosphorus removal reactor and a running method thereof. BACKGROUND

[0002] The anaerobic ammonia oxidation denitrification and phosphorus removal reactor couples anaerobic ammonia oxidation (Anammox) and biological phosphorus removal, converts ammonia nitrogen into nitrogen under anaerobic / anoxic conditions with nitrite as the electron acceptor, removes phosphorus by chemical crystallization, has the advantages of low energy consumption, low sludge yield, and less or no carbon source addition, and is suitable for high-ammonia-nitrogen and low-carbon-nitrogen-ratio wastewater.

[0003] However, the existing sewage treatment equipment still has deficiencies in terms of running stability and flexibility of running adjustment, and needs to be further improved and optimized. SUMMARY

[0004] The present application relates to the technical field of sewage treatment, in particular to an anaerobic ammonia oxidation coupled double-layer granular sludge denitrification and phosphorus removal reactor and a running method thereof.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: The anaerobic ammonia oxidation coupled double-layer granular sludge denitrification and phosphorus removal reactor comprises a reactor cylinder shell placed vertically and with an opening facing upward, a denitrification support partition plate, a mass transfer support partition plate and a phosphorus removal support partition plate are fixed in the reactor cylinder shell in sequence from bottom to top and arranged horizontally, and the reactor cylinder shell is divided into a sewage input chamber, a denitrification reaction chamber, a mass transfer isolation chamber and a phosphorus removal reaction chamber in sequence from bottom to top. A sewage input distribution ring shell is arranged around the reactor cylinder shell near the bottom position, the inner side of the sewage input distribution ring shell is connected with the sewage input chamber in communication through a plurality of sewage main input pipes, and a main input control valve is arranged on the sewage main input pipe. The denitrification support partition plate, the mass transfer support partition plate and the phosphorus removal support partition plate are all vertically penetrating porous hollow structures. A sewage total conveying pipe is arranged outside the sewage input distribution ring shell and connected with the sewage input distribution ring shell in communication. A reactor top cover with an opening facing downward and a semi-spherical shell structure is arranged at the top of the reactor cylinder shell. The denitrification reaction chamber is filled with denitrification reaction granular sludge. The phosphorus removal reaction chamber is filled with phosphorus removal reaction granular sludge. The phosphorus removal reaction chamber is connected with a cyclone separation mechanism through a sewage discharge pipe.

[0006] Preferably, a plurality of vertically penetrating mass transfer isolation cylinder shells are fixed in the mass transfer isolation chamber, and a plurality of horizontally arranged mass transfer porous partition plates are fixed in the mass transfer isolation cylinder shells. A vertically penetrating phosphorus-rich flow tube is installed on multiple mass transfer porous partitions, and a phosphorus-rich flow one-way valve is installed in the phosphorus-rich flow tube. A mass transfer enhanced negative electrode plate is fixed on the top surface of the mass transfer support separator, and a mass transfer enhanced positive electrode plate is fixed on the bottom surface of the phosphorus removal support separator.

[0007] Explanation: The porous mass transfer plate increases the mass transfer area and slows down the water flow, which is conducive to promoting the diffusion and transfer of phosphorus. Applying an electric field between the mass transfer enhanced negative plate and the mass transfer enhanced positive plate may actively enhance the cross-regional transport efficiency of phosphate ions through electrodialysis, electromigration and other methods.

[0008] Preferably, the cyclone separation mechanism includes a vertically extending cyclone separation cylinder shell, the bottom of which has an inverted conical structure; A vertically penetrating first connecting hole is provided at the center of the bottom of the cyclone separator shell, and a vertically extending clear liquid discharge pipe is fixed in the first connecting hole; A vertically penetrating second connecting hole is provided at the center of the top of the cyclone separator shell, and a vertically extending foam discharge pipe is slidably connected in the second connecting hole; A vertically penetrating third connection hole is provided at the top of the cyclone separator shell near the edge, and a vertically extending sludge particle discharge pipe is fixed in the third connection hole. The top of the cyclone separator shell is provided with an upward-opening foam lifting and fixing cylinder, and a downward-opening foam lifting sliding cylinder is slidably connected in the foam lifting and fixing cylinder. The top of the foam lifting sliding cylinder is fixedly connected to the foam discharge pipe. The foam lifting fixed cylinder is equipped with a foam lifting drive rod for driving the foam lifting sliding cylinder to move up and down; The top of the cyclone separator shell is rotatably connected to a vertically extending cyclone drive ring. Multiple vertically extending cyclone drive connecting rods are fixed to the lower side of the cyclone drive ring, and a cyclone drive plate is fixed to the lower end of the cyclone drive connecting rods.

[0009] Explanation: The cyclone drive ring drives multiple cyclone drive connecting rods and cyclone drive plates to rotate together, agitating the sewage entering the cyclone separator shell. Under centrifugal force, the sludge in the sewage will be thrown towards the inner wall of the cyclone separator shell, and the clear water in the center will be discharged through the clear liquid drain pipe.

[0010] Preferably, a mixing and reflux mechanism is provided on the outside of the reactor shell. The mixing and reflux mechanism includes a mixing and reflux pipe that connects the phosphorus removal reaction chamber and the nitrogen removal reaction chamber, and a mixing and reflux delivery pump is provided on the mixing and reflux pipe. The mixing reflux mechanism also includes an overpass reflux pipe that connects the denitrification reaction chamber and the dephosphorization reaction chamber, and an overpass reflux delivery pump is installed on the overpass reflux pipe.

[0011] Description: It can recirculate the effluent from the phosphorus removal zone containing nitrate nitrogen to the denitrification zone, providing some substrate for anaerobic ammonia oxidation and adjusting the pH; it can also directly pump the mixed liquor from the denitrification zone rich in ammonia nitrogen to the phosphorus removal zone, achieving hydraulic and substrate bypass circulation.

[0012] Preferably, multiple additional sewage input pipes are provided on the upper side of the sewage input distribution ring shell, and the additional sewage input pipes are connected to the interior of the phosphorus removal reaction chamber through an additional slow-flow mechanism.

[0013] Explanation: Controlling the opening of the additional input control valve allows a portion of the wastewater in the wastewater input distribution ring to be transported to the phosphorus removal reaction chamber through the additional wastewater input pipe and then processed by the additional slow-flow mechanism.

[0014] Preferably, the additional slow-flow mechanism includes a horizontally arranged additional slow-flow pipe shell, with an additional sewage inlet pipe connected to one end of the additional slow-flow pipe shell, and the other end of the additional slow-flow pipe shell connected to the interior of the phosphorus removal reaction chamber through an additional inlet connecting pipe. The additional slow-flow tube shell is fixed with a pair of slow-flow baffles arranged perpendicular to the flow direction, and the two adjacent slow-flow baffles form a segmented slow-flow chamber. The slow-flow baffle has a slow-flow chamber flow hole near the upper end that connects two adjacent slow-flow chamber segments.

[0015] Explanation: During the flow of wastewater through the various slow-flow chambers in the additional slow-flow pipe shell, it plays a role in slowing and stabilizing the flow. Then, through the additional inlet connecting pipe, it enters the lower part of the phosphorus removal reaction chamber, thus supplementing the phosphorus removal reaction chamber with a small amount of NO2. - The reactants can be reduced, and the impact on the reaction in the phosphorus removal chamber can be minimized.

[0016] Preferably, the phosphorus removal reaction chamber is provided with a dissolved oxygen gradient control mechanism, which includes a dissolved oxygen control partition that is horizontally arranged and slidably connected in the vertical direction in the phosphorus removal reaction chamber. The dissolved oxygen control partition has multiple vertically penetrating thin film connection slots, and a photosensitive oxygen control thin film is provided in the thin film connection slots. Multiple downward-facing buffer lifting fixed cylinders are fixed on the inner side wall of the phosphorus removal reaction chamber. A downward-facing buffer lifting sliding cylinder is slidably connected in the buffer lifting fixed cylinder. The lower ends of the multiple buffer lifting sliding cylinders are fixedly connected to the dissolved oxygen control partition. The buffer lifting fixed cylinder is equipped with a buffer lifting drive rod for driving the buffer lifting sliding cylinder to move up and down.

[0017] Explanation: A dissolved oxygen gradient control mechanism is used to create a micro-aerobic environment of 0.3–0.5 mg / L near the upper surface of the wastewater in the phosphorus removal reaction chamber. The surface-layer denitrifying phosphorus-accumulating bacteria utilize this micro-aerobic environment to absorb large amounts of PO4 from the water. 3- It synthesizes polyphosphates to promote biological phosphorus removal.

[0018] Preferably, a microbial activation mechanism is provided at the bottom of the reactor shell. The microbial activation mechanism includes a microbial activation containment shell located at the bottom of the reactor shell. The bottom of the reactor shell has multiple vertically penetrating gas supply pipe connection holes that communicate with the interior of the microbial activation containment shell. A vertically extending microbial activation gas supply pipe is slidably provided in the gas supply pipe connection holes. The microbial activation container is equipped with an activation gas tank, and the activation gas tank is equipped with a gas tank output pipe. The gas tank output pipe is connected to the lower end of the microbial activation gas supply pipe through a delivery hose. The microbial activation containment shell has multiple upward-facing activation lifting and fixing cylinders fixed inside. Activation lifting sliding cylinders are slidably connected to the activation lifting and fixing cylinders. The tops of the multiple activation lifting sliding cylinders are fixedly connected to each microbial activation gas delivery pipe. The activated lifting fixed cylinder is equipped with an activated lifting drive rod for driving the activated lifting sliding cylinder to move up and down.

[0019] Explanation: When the activity of anaerobic ammonia oxidizing bacteria decreases, the microbial activation mechanism is used to activate the anaerobic ammonia oxidizing bacteria. The NO gas stored in the activation gas tank is delivered to the sewage input chamber through the delivery hose and the microbial activation gas delivery pipe. NO, as a signaling molecule, can stimulate the activity of anaerobic ammonia oxidizing bacteria and promote the rapid recovery of the entire sewage treatment system.

[0020] This invention also provides a method for nitrogen and phosphorus removal from anaerobic ammonia oxidation coupled with a double-layer granular sludge reactor, which includes the following steps: S1. Wastewater input: The wastewater to be treated is pumped into the wastewater inlet distribution ring through the main wastewater inlet pipe using a transfer pump. The wastewater in the wastewater inlet distribution ring then enters the wastewater inlet chamber through multiple main wastewater inlet pipes. S2. Wastewater undergoes denitrification treatment: Wastewater flows upwards from bottom to top in the wastewater inlet chamber, passing through the denitrification support partition and entering the denitrification reaction chamber. Anaerobic ammonia-oxidizing bacteria and denitrifying bacteria are cultivated on the granular sludge of the denitrification reaction chamber. The wastewater undergoes anaerobic ammonia oxidation denitrification in the denitrification reaction chamber, utilizing NH4+. + and NO2 - As a substrate, it is directly converted into N2; S3. Wastewater undergoes phosphorus removal treatment: Wastewater continues to flow from bottom to top in the denitrification reaction chamber, passing through the mass transfer isolation chamber before entering the phosphorus removal reaction chamber. At this point, NH4... + The concentration has been significantly reduced, but residual PO4 remains in the wastewater. 3- NO3 -And anaerobic ammonia oxidation byproducts, phosphorus removal reaction granular sludge is anaerobic ammonia oxidation-hydroxyapatite type granular sludge formed by anaerobic ammonia oxidation bacteria with an outer layer of HAP inorganic crystals, and soluble phosphates in wastewater. , With calcium ions The anaerobic ammonia-oxidizing bacteria combine to form insoluble calcium phosphate precipitate, and further remove NH4 from the wastewater. + This achieves the purpose of water purification; S4. Water discharge: Wastewater treated for nitrogen and phosphorus removal is discharged through a wastewater discharge pipe, and a cyclone separator is used to separate the discharged wastewater, separating the clear liquid, particulate sludge, and microbial remains.

[0021] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects: 1. The present invention has a reasonable structural design and advanced core structure and process concept. The treatment process is functionally divided and spatially coupled. The entire reactor is vertically divided into three main functional areas: denitrification, mass transfer isolation and phosphorus removal. This realizes the synergistic treatment process of "autotrophic denitrification-biological phosphorus removal" in the same reactor and optimizes the process connection. 2. The double-layer granular sludge system of the present invention is filled with denitrification granular sludge and phosphorus removal granular sludge respectively. The granular sludge has the advantages of good settling performance, high biomass, strong resistance to shock load, and ability to enrich functional microbial communities, which greatly improves the treatment efficiency and operational stability of the reactor. 3. The porous perforated support partition design of the present invention allows sewage, ions and gas to pass smoothly between chambers, while effectively intercepting and separating different types of granular sludge, preventing sludge mixing and ensuring a good growth environment for each type of microorganism. 4. The design of the mass transfer isolation chamber of the present invention increases the mass transfer area and slows down the water flow rate, which is conducive to promoting the diffusion and transfer of phosphorus. At the same time, the phosphorus-rich guide pipe and the one-way valve can guide the phosphorus-rich mixture generated in the upper phosphorus removal zone to the lower part to supplement the needs of the denitrification zone. 5. The mass transfer enhancement electrode plate of the present invention can actively enhance the cross-regional transport efficiency of phosphate ions by applying an electric field through electrodialysis, electromigration, or other means. 6. This invention features a flexible bidirectional mixing and reflux system that can reflux the effluent from the phosphorus removal zone containing nitrate nitrogen back to the denitrification zone, providing some substrate for anaerobic ammonia oxidation and adjusting the pH; it can also directly pump the ammonia-rich denitrification zone mixture to the phosphorus removal zone, achieving hydraulic and substrate bypass circulation, providing the system with great operational flexibility. In actual operation, the flow rates of the two reflux lines can be flexibly adjusted according to the influent water quality to optimize the denitrification and phosphorus removal performance of the entire system. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the mass transfer isolation chamber of the present invention; Figure 3 This is a schematic diagram of the cyclone separation mechanism of the present invention; Figure 4 This is a schematic diagram of the additional flow-slowing mechanism of the present invention; Figure 5 This is a schematic diagram of the dissolved oxygen gradient control mechanism of the present invention; Figure 6 This is a schematic diagram of the microbial activation mechanism of the present invention.

[0023] In the diagram, 10-reactor shell, 101-denitrification support baffle, 102-mass transfer support baffle, 103-phosphorus removal support baffle, 104-reactor top cover, 11-sewage inlet chamber, 12-denitrification reaction chamber, 120-denitrification reaction granular sludge, 13-mass transfer isolation chamber, 131-mass transfer isolation shell, 132-mass transfer porous baffle, 133-phosphorus-rich guide pipe, 1330-phosphorus-rich guide one-way valve, 134-mass transfer enhanced positive electrode plate, 135-mass transfer enhanced negative electrode plate, 14-phosphorus removal reaction chamber, 140-phosphorus removal... 15 - Wastewater input distribution ring shell; 150 - Main wastewater conveying pipe; 151 - Main wastewater input pipe; 1510 - Main input control valve; 152 - Auxiliary wastewater input pipe; 1520 - Auxiliary input control valve; 153 - Auxiliary input connecting pipe; 16 - Wastewater discharge pipe; 17 - Cyclone separator; 171 - Cyclone separator shell; 1711 - First connecting hole; 1712 - Second connecting hole; 1713 - Third connecting hole; 172 - Clear liquid discharge pipe; 173 - Foam discharge pipe; 174 - Sludge particle discharge. Pipe, 175-Foam Lifting Fixed Cylinder, 176-Foam Lifting Sliding Cylinder, 177-Foam Lifting Drive Rod, 178-Swirl Drive Ring, 1781-Swirl Drive Connecting Rod, 179-Swirl Drive Plate, 18-Mixing Recirculation Mechanism, 181-Mixing Recirculation Pipe, 182-Mixing Recirculation Conveyor Pump, 183-Overpass Recirculation Pipe, 184-Overpass Recirculation Conveyor Pump, 20-Additional Slow Flow Mechanism, 21-Additional Slow Flow Pipe Shell, 22-Slow Flow Baffle, 220-Segmented Slow Flow Chamber, 221-Slow Flow Chamber Flow Hole, 30-Dissolved Oxygen Gradient Control mechanism, 31-dissolved oxygen control partition, 310-membrane connection slot, 32-photosensitive oxygen control membrane, 331-buffer lifting fixed cylinder, 332-buffer lifting sliding cylinder, 333-buffer lifting drive rod, 40-microbial activation mechanism, 41-microbial activation containment shell, 410-gas delivery pipe connection hole, 42-microbial activation gas delivery pipe, 43-activation gas storage tank, 431-gas tank output pipe, 432-delivery hose, 441-activation lifting fixed cylinder, 442-activation lifting sliding cylinder, 443-activation lifting drive rod. Detailed Implementation

[0024] The following is combined Figures 1-6 The present invention will be described in detail below. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0025] Example 1: Anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal reactor, such as Figure 1As shown, the reactor includes a vertically extending reactor shell 10 with its opening facing upward. Inside the reactor shell 10, from bottom to top, there are horizontally arranged denitrification support baffles 101, mass transfer support baffles 102 and phosphorus removal support baffles 103. The reactor shell 10 is divided from bottom to top into a wastewater input chamber 11, a denitrification reaction chamber 12, a mass transfer isolation chamber 13 and a phosphorus removal reaction chamber 14. A wastewater input distribution ring shell 15 is arranged around the outer side of the reactor shell 10 near the bottom. The inner side of the wastewater input distribution ring shell 15 is connected to the wastewater input chamber 11 through multiple wastewater main input pipes 151. A main input control valve 1510 is provided on the wastewater main input pipes 151. The denitrification support partition 101, the mass transfer support partition 102, and the phosphorus removal support partition 103 are all vertically penetrating porous structures. A main sewage conveying pipe 150 connected to the outer side of the sewage input and distribution ring shell 15 is provided therewith; The reactor shell 10 is provided with a reactor top cover 104 with an opening facing downward and a hemispherical shell structure; The denitrification reaction chamber 12 is filled with denitrification reaction granular sludge 120; The phosphorus removal reaction chamber 14 is filled with phosphorus removal reaction granular sludge 140; The phosphorus removal reaction chamber 14 is connected to a sewage discharge pipe 16 and is equipped with a cyclone separation mechanism 17.

[0026] Example 2: This embodiment describes an anaerobic ammonia oxidation coupled with a two-layer granular sludge nitrogen and phosphorus removal method, based on the anaerobic ammonia oxidation coupled with a two-layer granular sludge nitrogen and phosphorus removal reactor of Embodiment 1 above, including the following steps: S1. Wastewater input: The wastewater to be treated is pumped into the wastewater inlet distribution ring 15 through the wastewater main inlet pipe 150 using a transfer pump. The wastewater in the wastewater inlet distribution ring 15 then enters the wastewater inlet chamber 11 through multiple wastewater main inlet pipes 151. S2. Wastewater undergoes denitrification treatment: Wastewater flows upward through the wastewater inlet chamber 11, passing through the denitrification support partition 101 and entering the denitrification reaction chamber 12. Anaerobic ammonia oxidizing bacteria and denitrifying bacteria are cultured on the denitrification reaction granular sludge 120. The wastewater undergoes anaerobic ammonia oxidation denitrification in the denitrification reaction chamber 12, utilizing NH4+. + and NO2 - As a substrate, it is directly converted into N2; The anaerobic ammonia oxidizing bacteria and denitrifying bacteria used are existing technologies. For example, the anaerobic ammonia oxidizing bacteria can be Candidatus Brocadia sinica with accession number JCM 19050 and Candidatus Kuenenia stuttgartiensis with accession number DSM 16038. Denitrifying bacteria can be, for example, *Pseudomonas schlegelii* with accession number CGMCC 1.1803, *Paracoccus denitrificans* with accession number ATCC17741, and *Bacillus licheniformis* with accession number ATCC 14580; S3. Wastewater undergoes phosphorus removal treatment: Wastewater continues to flow from bottom to top in the denitrification reaction chamber 12, passes through the mass transfer isolation chamber 13, and then enters the phosphorus removal reaction chamber 14. At this time, NH4 + The concentration has been significantly reduced, but residual PO4 remains in the wastewater. 3- NO3 - The anaerobic ammonia oxidation byproducts are mainly removed through chemical crystallization in the phosphorus removal reaction chamber 14. The phosphorus removal reaction granular sludge 140 is an anaerobic ammonia oxidation-hydroxyapatite type granular sludge formed by anaerobic ammonia oxidation bacteria, with an outer layer of HAP inorganic crystals. The soluble phosphates in the wastewater... , With calcium ions The anaerobic ammonia-oxidizing bacteria combine to form insoluble calcium phosphate precipitate, and further remove NH4 from the wastewater. + This achieves the purpose of water purification; The phosphorus removal reaction granular sludge 140 is an existing technology. The anaerobic ammonia oxidizing bacteria wrapped in the inorganic crystal outer layer of HAP can be, for example, a complex microbial community of Brocadia, Kuenenia, and Jettenia. S4. Water discharge: The wastewater after denitrification and phosphorus removal is discharged through the wastewater discharge pipe 16, and the discharged wastewater is separated by the cyclone separator 17 to separate the clear liquid, particulate sludge and microbial residues in the wastewater.

[0027] Example 3: Based on Example 1, such as Figure 1 As shown, a microbial activation mechanism 40 is provided at the bottom of the reactor shell 10, such as... Figure 6 As shown, the microbial activation mechanism 40 includes a microbial activation containment shell 41 located at the bottom of the reactor shell 10. The bottom of the reactor shell 10 has a plurality of vertically penetrating gas supply pipe connection holes 410 that communicate with the interior of the microbial activation containment shell 41. A vertically extending microbial activation gas supply pipe 42 is slidably disposed in the gas supply pipe connection holes 410. The microbial activation container 41 is equipped with an activation gas tank 43, and the activation gas tank 43 is equipped with a gas tank output pipe 431. The gas tank output pipe 431 is equipped with an existing electric control valve. The gas tank output pipe 431 is connected to the lower end of the microbial activation gas supply pipe 42 through a delivery hose 432. The microbial activation containment shell 41 has multiple upward-facing activation lifting and fixing cylinders 441 fixed inside. Activation lifting and fixing cylinders 441 are slidably connected to activation lifting and sliding cylinders 442. The tops of the multiple activation lifting and sliding cylinders 442 are fixedly connected to each microbial activation gas delivery pipe 42. The activated lifting fixed cylinder 441 is provided with an activated lifting drive rod 443 for driving the activated lifting sliding cylinder 442 to move up and down. The activated lifting drive rod 443 is an existing electrically controlled telescopic rod driven by a servo motor. The outer end of the activated lifting drive rod 443 is fixedly connected to the bottom of the activated lifting fixed cylinder 441, and the inner end of the activated lifting drive rod 443 is fixedly connected to the top of the activated lifting sliding cylinder 442.

[0028] Example 4: This embodiment describes an anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal method. Based on the anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal reactor of Embodiment 3, the difference from Embodiment 2 is that in step S2, when the activity of anaerobic ammonia oxidizing bacteria decreases in the denitrification reaction chamber 12, the sewage input chamber 11 is first reduced to 30% of the original amount. Then, the anaerobic ammonia oxidizing bacteria are activated using the microbial activation mechanism 40. The activation gas storage tank 43 stores NO gas. The inner rod of the activation lifting drive rod 443 extends out, driving the activation lifting sliding cylinder 442 and the microbial activation gas supply pipe 42 to move upward together, so that the upper end of the microbial activation gas supply pipe 42 extends into the sewage input chamber 11. The valve on the gas tank output pipe 431 is opened, and a trace amount of NO gas is supplied to the sewage in the sewage input chamber 11 through the delivery hose 432 and the microbial activation gas supply pipe 42 at a rate of 1 liter per minute. NO, as a signal molecule, can stimulate the activity of anaerobic ammonia oxidizing bacteria and promote the rapid recovery of the entire sewage treatment system. After 10 minutes of delivery, close the valve on the gas tank output pipe 431, activate the inner rod of the lifting drive rod 443 to retract, and drive the lifting sliding cylinder 442 and the microbial activation gas delivery pipe 42 to move down together, so that the upper end of the microbial activation gas delivery pipe 42 is flush with the bottom of the sewage input chamber 11 again.

[0029] Example 5: Based on Example 3, such as Figure 1As shown, a mixing and reflux mechanism 18 is provided on the outside of the reactor shell 10. The mixing and reflux mechanism 18 includes a mixing and reflux pipe 181 that connects the phosphorus removal reaction chamber 14 and the nitrogen removal reaction chamber 12. A mixing and reflux delivery pump 182 is provided on the mixing and reflux pipe 181. The upper end of the mixing reflux pipe 181 is connected to the bottom of the phosphorus removal reaction chamber 14, and the lower end of the mixing reflux pipe 181 is connected to the top of the denitrification reaction chamber 12. The mixing reflux mechanism 18 also includes an overpass reflux pipe 183 that connects the denitrification reaction chamber 12 and the phosphorus removal reaction chamber 14, and an overpass reflux delivery pump 184 is provided on the overpass reflux pipe 183. The upper end of the bypass reflux pipe 183 is connected to the top of the phosphorus removal reaction chamber 14, and the lower end of the bypass reflux pipe 183 is connected to the bottom of the denitrification reaction chamber 12.

[0030] Example 6: This embodiment describes an anaerobic ammonia oxidation coupled with a two-layer granular sludge denitrification and phosphorus removal method. Based on the anaerobic ammonia oxidation coupled with a two-layer granular sludge denitrification and phosphorus removal reactor of Embodiment 5, the difference from Embodiment 4 is that in step S3, during the wastewater treatment process, driven by the mixing reflux pump 182, a portion of the wastewater in the phosphorus removal reaction chamber 14 is transported to the denitrification reaction chamber 12 through the mixing reflux pipe 181, supplementing the main anaerobic ammonia oxidation reaction in the denitrification reaction chamber 12 with the key electron acceptor NO2. - ; Driven by the overpass backflow pump 184, a portion of the wastewater in the denitrification reaction chamber 12 is transported to the phosphorus removal reaction chamber 14 through the overpass backflow pipe 183. This adjusts the nitrogen balance and material distribution between the phosphorus removal reaction chamber 14 and the denitrification reaction chamber 12. If the short-cut nitrification process in the phosphorus removal reaction chamber 14 is too strong, it may lead to NO2... - Accumulation and inhibition of microorganisms occur when the denitrification reaction chamber 12 is rich in NH4+. + Wastewater is transported to phosphorus removal reaction chamber 14, which can remove excess NO2. - Provide reaction substrates.

[0031] Example 7: Based on Example 5, such as Figure 2 As shown, multiple vertically penetrating mass transfer isolation cylinder shells 131 are fixed inside the mass transfer isolation chamber 13, and multiple horizontally arranged porous mass transfer baffles 132 are fixed inside the mass transfer isolation cylinder shells 131. The mass transfer porous partition 132 is a porous ceramic plate of the prior art; A vertically penetrating phosphorus-rich flow tube 133 is connected to multiple mass transfer porous partitions 132. A phosphorus-rich flow one-way valve 1330 is provided in the phosphorus-rich flow tube 133. The phosphorus-rich flow one-way valve 1330 only allows flow from top to bottom. A mass transfer enhanced negative electrode plate 134 is fixed on the top surface of the mass transfer support partition 102, and a mass transfer enhanced positive electrode plate 135 is fixed on the bottom surface of the phosphorus removal support partition 103.

[0032] Example 8: This embodiment describes an anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal method. Based on the anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal reactor of Embodiment 7, the difference from Embodiment 6 is that in step S3, within the mass transfer isolation chamber 13, the mass transfer enhancement negative electrode plate 134 and the mass transfer enhancement positive electrode plate 135 are respectively connected to the negative and positive terminals of a 12V DC power supply, forming a micro-electric field within the mass transfer isolation chamber 13, which promotes the removal of NH4+ from the denitrification reaction chamber 12. + Downward migration, and prompting PO4 3- It migrates upwards, enhancing phosphorus removal.

[0033] Example 9: Based on Example 7, such as Figure 1 As shown, the phosphorus removal reaction chamber 14 is equipped with a dissolved oxygen gradient control mechanism 30, such as... Figure 5 As shown, the dissolved oxygen gradient control mechanism 30 includes a dissolved oxygen control partition 31 arranged horizontally and slidably connected in the phosphorus removal reaction chamber 14 in the vertical direction. The dissolved oxygen control partition 31 has a plurality of vertically penetrating thin film connection slots 310, and a photosensitive oxygen control thin film 32 is provided in the thin film connection slots 310. The photosensitive oxygen control film 32 is a commercially available product of existing technology, such as a PDMS composite film doped with TiO2. Multiple downward-facing buffer lifting fixed cylinders 331 are fixed on the inner wall of the phosphorus removal reaction chamber 14. A downward-facing buffer lifting sliding cylinder 332 is slidably connected in the buffer lifting fixed cylinder 331. The lower ends of the multiple buffer lifting sliding cylinders 332 are fixedly connected to the dissolved oxygen control partition 31. The buffer lifting fixed cylinder 331 is provided with a buffer lifting drive rod 333 for driving the buffer lifting sliding cylinder 332 to move up and down. The buffer lifting drive rod 333 is an existing electrically controlled telescopic rod driven by a servo motor. The outer end of the buffer lifting drive rod 333 is fixedly connected to the top of the buffer lifting fixed cylinder 331, and the inner end of the buffer lifting drive rod 333 is fixedly connected to the top of the buffer lifting sliding cylinder 332.

[0034] Example 10: This embodiment describes an anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal method. Based on the anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal reactor of Embodiment 9, the difference from Embodiment 8 is that in step S3, a dissolved oxygen gradient control mechanism 30 is used to control the formation of a micro-oxygen environment of 0.3~0.5 mg / L near the upper surface of the wastewater in the phosphorus removal reaction chamber 14, thereby promoting the wastewater purification process. By controlling the light intensity irradiated onto the photosensitive oxygen control film 32, the air flux of the photosensitive oxygen control film 32 is controlled, thereby controlling the oxygen content dissolved in the surface water.

[0035] Example 11: Based on Example 9, such as Figure 1 As shown, multiple additional sewage input pipes 152 are provided on the upper side of the sewage input distribution ring shell 15. Additional input control valves 1520 are provided on the additional sewage input pipes 152. The additional sewage input pipes 152 are connected to the inside of the phosphorus removal reaction chamber 14 through the additional slow flow mechanism 20.

[0036] like Figure 4 As shown, the additional slow-flow mechanism 20 includes a horizontally arranged additional slow-flow pipe shell 21. The sewage additional input pipe 152 is connected to one end of the additional slow-flow pipe shell 21, and the other end of the additional slow-flow pipe shell 21 is connected to the inside of the phosphorus removal reaction chamber 14 through the additional input connecting pipe 153. The additional slow-flow tube shell 21 is fixed with a pair of slow-flow baffles 22 arranged perpendicular to the flow direction, and a segmented slow-flow chamber 220 is formed between two adjacent slow-flow baffles 22. The slow-flow baffle 22 has a slow-flow chamber flow hole 221 near its upper end, which connects two adjacent segmented slow-flow chambers 220.

[0037] Example 12: This embodiment describes an anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal method. Based on the anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal reactor of Embodiment 11, the difference from Embodiment 10 is that in step S3, the opening degree of the additional input control valve 1520 is controlled so that 10~30% of the sewage in the sewage input distribution ring shell 15 is transported to the phosphorus removal reaction chamber 14 after being processed by the additional slow flow mechanism 20 through the sewage additional input pipe 152. Wastewater in the wastewater supplementary inlet pipe 152 first flows into the supplementary slow-flow pipe shell 21. The wastewater in the supplementary slow-flow pipe shell 21 flows sequentially through each segmented slow-flow chamber 220, and then enters the lower middle part of the phosphorus removal reaction chamber 14 through the supplementary inlet connecting pipe 153, which can supplement NO2 in the phosphorus removal reaction chamber 14. - The reactants can reduce the impact on the reaction inside the phosphorus removal chamber 14.

[0038] Example 13: Based on Example 11, such as Figure 3 As shown, the cyclone separation mechanism 17 includes a vertically extending cyclone separation cylinder shell 171, and the bottom of the cyclone separation cylinder shell 171 has an inverted conical structure. A vertically penetrating first connecting hole 1711 is provided at the center of the bottom of the cyclone separator shell 171, and a vertically extending clear liquid discharge pipe 172 is fixed in the first connecting hole 1711. A vertically penetrating second connecting hole 1712 is provided at the center of the top of the cyclone separator shell 171, and a vertically extending foam discharge pipe 173 is slidably connected in the second connecting hole 1712. A vertically penetrating third connection hole 1713 is provided at the top of the cyclone separator shell 171 near the edge, and a vertically extending sludge particle discharge pipe 174 is fixed in the third connection hole 1713. The top of the cyclone separator shell 171 is provided with an upward-opening foam lifting and fixing cylinder 175. A downward-opening foam lifting sliding cylinder 176 is slidably connected in the foam lifting and fixing cylinder 175. The top of the foam lifting sliding cylinder 176 is fixedly connected to the foam discharge pipe 173. The foam lifting fixed cylinder 175 is provided with a foam lifting drive rod 177 for driving the foam lifting sliding cylinder 176 to move up and down. The foam lifting drive rod 177 is an existing electric control telescopic rod driven by a servo motor. The outer rod end of the foam lifting drive rod 177 is fixedly connected to the bottom of the foam lifting fixed cylinder 175, and the inner rod end of the foam lifting drive rod 177 is fixedly connected to the top of the foam lifting sliding cylinder 176. The top of the cyclone separator shell 171 is rotatably connected to a vertically extending cyclone drive ring 178. Multiple vertically extending cyclone drive connecting rods 1781 are fixed to the lower side of the cyclone drive ring 178, and a cyclone drive plate 179 is fixed to the lower end of the cyclone drive connecting rods 1781. The cyclone drive ring 178 is rotated by a prior art motor fixed inside the top of the cyclone separator shell 171 via gears.

[0039] Example 14: This embodiment describes an anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal method. Based on the anaerobic ammonia oxidation coupled with a double-layer granular sludge denitrification and phosphorus removal reactor of Embodiment 13, the difference from Embodiment 12 is that in step S4, in the cyclone separation mechanism 17, the treated sewage discharged from the sewage discharge pipe 16 enters the cyclone separation cylinder shell 171. The cyclone drive ring 178 is driven to rotate by a conventional motor fixed to the top of the cyclone separation cylinder shell 171 through gears. The cyclone drive ring 178 then drives multiple cyclone drive connecting rods 1781 and cyclone drive plates 179 to rotate together, agitating the sewage entering the cyclone separation cylinder shell 171. Under centrifugal action, the sludge in the sewage will be thrown towards the inner wall of the cyclone separation cylinder shell 171, and the clear water in the center will be discharged through the clear liquid discharge pipe 172. The extension or retraction of the inner rod of the foam lifting drive rod 177 can drive the foam lifting sliding cylinder 176 and the foam discharge pipe 173 to rise or fall together, thereby adjusting the height of the foam discharge pipe 173 so that the lower end of the foam discharge pipe 173 just contacts the liquid surface at the center. The outer end of the foam discharge pipe 173 is connected to a suction pump, which is used to suck out the microbial debris foam at the center of the liquid surface. A suction pump is connected to the outer end of the sludge particle discharge pipe 174. Under the suction action of the suction pump, the granular sludge at the inner wall of the cyclone separator shell 171 is discharged.

Claims

1. An anaerobic ammonia oxidation coupled double-layer granular sludge denitrification and phosphorus removal reactor, characterized in that, The application relates to a sewage treatment reactor, which comprises a reactor cylinder shell (10) extending vertically and placed with an upward opening, a denitrification support partition plate (101), a mass transfer support partition plate (102) and a phosphorus removal support partition plate (103) arranged horizontally and fixed in the reactor cylinder shell (10) in sequence from bottom to top, and a sewage input chamber (11), a denitrification reaction chamber (12), a mass transfer isolation chamber (13) and a phosphorus removal reaction chamber (14) sequentially separated in the reactor cylinder shell (10) from bottom to top. A sewage input distribution ring shell (15) is arranged around the reactor cylinder shell (10) near the bottom, the sewage input distribution ring shell (15) is connected with the sewage input chamber (11) through a plurality of sewage main input pipes (151) on the inner side, and a main input control valve (1510) is arranged on the sewage main input pipe (151). The denitrification support partition plate (101), the mass transfer support partition plate (102) and the phosphorus removal support partition plate (103) are all porous hollow structures extending vertically. A sewage total conveying pipe (150) is arranged on the outer side of the sewage input distribution ring shell (15) and connected with the sewage input distribution ring shell (15). A reactor top cover (104) with a downward opening and a semi-spherical shell structure is arranged on the top of the reactor cylinder shell (10). The denitrification reaction chamber (12) is filled with denitrification reaction granular sludge (120). The phosphorus removal reaction chamber (14) is filled with phosphorus removal reaction granular sludge (140). The phosphorus removal reaction chamber (14) is connected with a cyclone separation mechanism (17) through a sewage discharge pipe (16).

2. The ANAMMOX coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 1, characterized in that, A plurality of mass transfer isolation cylinder shells (131) extending vertically are fixed in the mass transfer isolation chamber (13), and a plurality of mass transfer porous partition plates (132) arranged horizontally are fixed in the mass transfer isolation cylinder shells (131). A phosphorus-rich flow guide pipe (133) extending vertically is arranged through the mass transfer porous partition plates (132), and a phosphorus-rich flow guide one-way valve (1330) is arranged in the phosphorus-rich flow guide pipe (133). A mass transfer strengthening negative plate (134) is fixed to the top surface of the mass transfer support partition plate (102), and a mass transfer strengthening positive plate (135) is fixed to the bottom surface of the phosphorus removal support partition plate (103).

3. The ANAMMOX coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 1, characterized in that, The cyclone separation mechanism (17) comprises a cyclone separation cylinder shell (171) extending vertically, and the bottom of the cyclone separation cylinder shell (171) is in an inverted conical structure. A first connecting hole (1711) extending vertically is arranged in the center of the bottom of the cyclone separation cylinder shell (171), and a clear liquid discharge pipe (172) extending vertically is fixed in the first connecting hole (1711). A second connecting hole (1712) extending vertically is arranged in the center of the top of the cyclone separation cylinder shell (171), and a floating scum discharge pipe (173) extending vertically is slidably connected in the second connecting hole (1712). A third connecting hole (1713) extending vertically is arranged in the edge of the top of the cyclone separation cylinder shell (171), and a sludge granule discharge pipe (174) extending vertically is fixed in the third connecting hole (1713). The cyclone separation cylinder shell (171) top is equipped with the upward opening floating scum lifting fixed cylinder (175), the floating scum lifting fixed cylinder (175) is slidably connected with the downward opening floating scum lifting sliding cylinder (176), the floating scum lifting sliding cylinder (176) top end is fixedly connected with the floating scum discharge pipe (173); The floating scum lifting fixed cylinder (175) is equipped with the floating scum lifting drive rod (177) for driving the floating scum lifting sliding cylinder (176) to move up and down; The cyclone separation cylinder shell (171) inner top is rotatably connected with the axis vertical extension cyclone drive ring (178), the cyclone drive ring (178) lower side is fixed with multiple vertical extension cyclone drive connecting rods (1781), the cyclone drive connecting rod (1781) lower end is fixed with the cyclone drive plate (179).

4. The CANON-coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 1, characterized in that, The reactor cylinder shell (10) outside is equipped with the mixing backflow mechanism (18), the mixing backflow mechanism (18) includes the mixing backflow pipe (181) communicating the phosphorus removal reaction chamber (14) and the denitrification reaction chamber (12), the mixing backflow pipe (181) is equipped with the mixing backflow conveying pump (182); The mixing backflow mechanism (18) further includes the override backflow pipe (183) communicating the denitrification reaction chamber (12) and the phosphorus removal reaction chamber (14), the override backflow pipe (183) is equipped with the override backflow conveying pump (184).

5. The CANON-coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 1, characterized in that, The sewage input distribution ring shell (15) upper side is equipped with multiple sewage additional input pipes (152), the sewage additional input pipe (152) is communicated with the phosphorus removal reaction chamber (14) inside through the additional slow flow mechanism (20).

6. The CANON-coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 5, characterized in that, The additional slow flow mechanism (20) includes the horizontally arranged additional slow flow pipe shell (21), the sewage additional input pipe (152) is communicated with one end of the additional slow flow pipe shell (21), the additional slow flow pipe shell (21) other end is communicated with the phosphorus removal reaction chamber (14) inside through the additional input communication pipe (153); The additional slow flow pipe shell (21) is fixed with the slow flow partition plate (22) perpendicular to the flow direction, The slow flow partition plate (22) is close to the upper end position and has the slow flow chamber flow through hole (221) communicating adjacent two segmental slow flow chambers (220).

7. The CANON-coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 1, characterized in that, The phosphorus removal reaction chamber (14) is equipped with the dissolved oxygen gradient control mechanism (30), the dissolved oxygen gradient control mechanism (30) includes the dissolved oxygen control partition plate (31) horizontally arranged and slidably connected in the phosphorus removal reaction chamber (14), the dissolved oxygen control partition plate (31) is equipped with multiple vertical through film connecting grooves (310), the film connecting groove (310) is equipped with the photosensitive oxygen sensing film (32); A plurality of downwardly open buffering lifting fixing cylinders (331) are fixed on the inner side wall of the phosphorus removal reaction chamber (14), an upwardly open buffering lifting sliding cylinder (332) is slidingly connected in each of the buffering lifting fixing cylinders (331), and the lower ends of the plurality of buffering lifting sliding cylinders (332) are fixedly connected with the dissolved oxygen control partition plate (31) in common; A buffering lifting driving rod (333) for driving the buffering lifting sliding cylinder (332) to move up and down is arranged in the buffering lifting fixing cylinder (331).

8. The CANON-coupled double-layer granular sludge denitrification and phosphorus removal reactor according to claim 1, characterized in that, A microbial activation mechanism (40) is arranged at the bottom of the reactor cylinder shell (10), the microbial activation mechanism (40) comprises a microbial activation accommodating shell (41) arranged at the bottom of the reactor cylinder shell (10), the bottom of the reactor cylinder shell (10) is provided with a plurality of gas pipe connecting holes (410) vertically penetrating and communicating with the inside of the microbial activation accommodating shell (41), and a microbial activation gas pipe (42) vertically extending is slidingly arranged in each of the gas pipe connecting holes (410). An activation gas tank (43) is arranged in the microbial activation accommodating shell (41), the activation gas tank (43) is provided with a gas tank output pipe (431), and the gas tank output pipe (431) is in communication with the lower end of the microbial activation gas pipe (42) through a conveying hose (432); A plurality of upwardly open activation lifting fixing cylinders (441) are fixed in the microbial activation accommodating shell (41), an activation lifting sliding cylinder (442) is slidingly connected in each of the activation lifting fixing cylinders (441), and the top of each of the activation lifting sliding cylinders (442) is fixedly connected with the microbial activation gas pipe (42) in a one-to-one correspondence. An activation lifting driving rod (443) for driving the activation lifting sliding cylinder (442) to move up and down is arranged in the activation lifting fixing cylinder (441).

9. The method for denitrification and dephosphorization by anaerobic ammonia oxidation coupled with double-layer granular sludge, based on the denitrification and dephosphorization reactor by anaerobic ammonia oxidation coupled with double-layer granular sludge according to any one of claims 1-8, characterized in that, The following steps are included: S1, sewage input: The sewage to be treated is input into the sewage input distribution ring shell (15) through the sewage total conveying pipe (150) by using a conveying pump, and the sewage in the sewage input distribution ring shell (15) enters the sewage input chamber (11) through a plurality of sewage main input pipes (151); S2, sewage denitrification treatment: The sewage flows from bottom to top through the denitrification support partition (101) into the denitrification reaction chamber (12) in the sewage input chamber (11), the denitrification reaction granular sludge (120) is cultured with anaerobic ammonia oxidation bacteria and denitrifying bacteria, the sewage is subjected to anaerobic ammonia oxidation denitrification in the denitrification reaction chamber (12), NH4 + and NO2 - are directly converted into N2 as substrates; S3, sewage phosphorus removal treatment: The sewage continues to flow upward through the mass transfer isolation chamber (13) in the denitrification reaction chamber (12) and then enters the phosphorus removal reaction chamber (14). At this time, the concentration of NH4 + has been greatly reduced, and the sewage contains residual PO4 3- , NO3 - , and anaerobic ammonia oxidation byproducts. The phosphorus removal reaction granular sludge (140) is an anaerobic ammonia oxidation-hydroxyapatite type granular sludge formed by the outer layer of HAP inorganic crystals wrapping anaerobic ammonia oxidation bacteria. The soluble phosphate in the sewage , binds with calcium ions to generate insoluble calcium phosphate precipitates, and the anaerobic ammonia oxidation bacteria further remove NH4 + in the sewage, achieving the purpose of water purification; S4, effluent discharge: The sewage treated by denitrification and phosphorus removal is discharged through the sewage discharge pipe (16), and the sewage is separated and treated by using a cyclone separation mechanism (17), so that the supernatant, granular sludge and microbial debris in the sewage are separated.

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