Intelligent adjusting tank system for carbon source recovery

Abstract

The invention discloses an intelligent adjusting tank system for carbon source recovery, and relates to the technical field of sewage treatment, the intelligent adjusting tank system comprises an intelligent homogeneous adjusting tank, the intelligent homogeneous adjusting tank comprises an adjusting tank body, and the inner side of the middle part of the adjusting tank body is connected with the bottom end of a diversion annular sleeve; the device further comprises an adjusting tank water distribution mechanism, a homogeneous stirring mechanism, a hydrolytic acidification-membrane separation coupling tank and an intelligent dosing unit, wherein the adjusting tank water distribution mechanism is mounted in the middle of the arc-shaped tank bottom; the homogeneous stirring mechanism is mounted in the middle of the regulating tank body; according to the intelligent adjusting tank system for recycling the carbon source, the quality of inflow water is monitored and pre-adjusted in real time through the intelligent homogeneous adjusting tank, the buffering capacity on inflow water impact load is high, it is ensured that wastewater entering the hydrolytic acidification cavity is in the optimal reaction condition, volatile fatty acid is enriched and recycled through the membrane separation effect, and the yield is high. The recovered carbon source can be directly used for a subsequent biological nitrogen and phosphorus removal process, so that the problem of insufficient carbon source during nitrogen and phosphorus removal of industrial wastewater with low carbon nitrogen ratio is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to an intelligent regulating tank system for carbon source recovery. Background Technology

[0002] Industrial wastewater is characterized by large fluctuations in water quality and quantity, complex composition, and poor biodegradability. The equalization tank, as the core unit of wastewater pretreatment, plays a crucial role in homogenizing water quality and balancing water volume, creating stable conditions for subsequent wastewater treatment. Traditional equalization tanks have a single function, serving only as a buffer. They are often followed by a hydrolysis acidification tank, where anaerobic microorganisms decompose recalcitrant macromolecular organic matter into smaller organic molecules, improving the wastewater's biodegradability (BOD / COD ratio). This has become an effective pretreatment method for treating recalcitrant industrial wastewater. However, the existing combined process of "equalization tank + hydrolysis acidification tank" still has significant shortcomings. Traditional equalization tanks lack intelligent control methods and have limited buffering capacity against influent shock loads. The main products generated during the hydrolysis and acidification process in the hydrolysis and acidification tank—volatile fatty acids (VFAs)—are high-quality carbon sources required for biological nitrogen and phosphorus removal processes. In traditional processes, these VFAs are carried into the subsequent aerobic units with the water flow and are not fully utilized. For industrial wastewater with a low carbon-to-nitrogen ratio (C / N), additional carbon sources such as sodium acetate and methanol are often required for subsequent nitrogen removal, which greatly increases operating costs. Summary of the Invention

[0003] The technical problem this invention aims to solve is to overcome the shortcomings of existing systems and provide an intelligent equalization tank system for carbon source recovery. This system uses an intelligent equalization tank to monitor and pre-regulate the influent water quality in real time, providing strong buffering capacity against influent shock loads and ensuring that the wastewater entering the hydrolysis acidification chamber is under optimal reaction conditions. The hydrolysis acidification tank is coupled with a built-in membrane separation mechanism. By controlling the hydraulic retention time and sludge retention time, recalcitrant macromolecular organic matter is efficiently converted into easily biodegradable small-molecule carbon sources such as volatile fatty acids. These carbon sources are then enriched and recovered using membrane separation. The recovered carbon sources can be directly used in subsequent biological nitrogen and phosphorus removal processes, effectively solving the problem of insufficient carbon sources in the nitrogen and phosphorus removal of low-carbon-to-nitrogen ratio industrial wastewater. Simultaneously, it significantly improves the biodegradability of the wastewater, reduces the treatment load of subsequent processes and the cost of external carbon sources, and achieves resource recovery and energy conservation in the industrial wastewater treatment process. This effectively solves the problems in the background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an intelligent regulating tank system for carbon source recovery, comprising an intelligent homogenizing regulating tank, the intelligent homogenizing regulating tank including a regulating tank body, the bottom of the regulating tank body being connected to an arc-shaped tank bottom, the top of the regulating tank body being provided with a bridge plate, the intelligent homogenizing regulating tank also including a flow guiding annular sleeve, the inner side of the middle part of the regulating tank body being connected to the bottom end of the flow guiding annular sleeve, the annular area between the flow guiding annular sleeve and the top of the regulating tank body being a static buffer chamber, and the top of the flow guiding annular sleeve being equipped with an overflow height control component; Also includes: The water distribution mechanism of the regulating pool is installed in the middle of the arc-shaped pool bottom; The homogenizing and stirring mechanism is installed in the middle of the equalization tank. The hydrolysis acidification-membrane separation coupling cell is installed below the equalization tank. The intelligent dosing unit is installed on the bridge plate.

[0005] Industrial wastewater is fed downwards into the center of the bottom of the equalization tank through the water distribution mechanism. After encountering the curved bottom, the wastewater flows upwards again and is guided by the flow-guiding ring to converge at the center of the top of the equalization tank. This process stirs up the sludge deposited on the upper side of the curved bottom and promotes mixing between the industrial wastewater and the existing wastewater in the equalization tank, enhancing the buffering capacity against influent shock loads. A homogenizing and stirring mechanism thoroughly agitates the wastewater in the equalization tank, ensuring complete mixing of newly entering wastewater with the existing wastewater and facilitating water quality homogenization. An intelligent dosing unit adds pH-adjusting agents, typically dilute sulfuric acid, to adjust the pH of the wastewater in the equalization tank to approximately 6.0. Simultaneously, the wastewater in the equalization tank is aerated to prevent the equalization tank from overflowing. To address the deterioration of internal water quality and ensure the stability of subsequent processes, while also improving the treatability of wastewater, the addition of chemicals and aeration provide initial conditioning and homogenization of the water quality inside the regulating tank. Water in the regulating tank flows over the top of the guide ring sleeve into the settling buffer chamber, and then into the hydrolysis acidification-membrane separation coupling tank for hydrolysis acidification. This process efficiently converts recalcitrant large organic molecules into easily biodegradable small carbon sources such as volatile fatty acids. The settling buffer chamber keeps the water still and reduces its oxygen content, preventing high-oxygen wastewater from entering the hydrolysis acidification-membrane separation coupling tank and affecting the low-oxygen or micro-anaerobic environment it requires. The overflow height control component controls the flow of wastewater from the regulating tank into the settling buffer chamber. Even if the inflow rate and water level in the regulating tank decrease, a certain amount of wastewater can still enter the settling buffer chamber, achieving the function of balancing the water volume in the regulating tank.

[0006] Furthermore, the water distribution mechanism of the regulating tank includes a hollow water distribution plate. The center of the arc-shaped tank bottom protrudes upward to form a water distribution and dispersion cover. The top of the water distribution and dispersion cover is fixedly connected to the hollow water distribution plate. Multiple water distribution holes are arranged in a ring array along the bottom edge of the hollow water distribution plate. One end of the water supply pipe is connected to the bottom of the hollow water distribution plate. An external sewage pump delivers industrial wastewater into the hollow water distribution plate through the water supply pipe, and then disperses it downward through the water distribution holes. The downward water flow encounters the water distribution and dispersion cover and then disperses in all directions. The water flow then encounters the arc-shaped tank bottom and the guide ring sleeve in sequence. The water flow from the water distribution holes agitates the sludge at the bottom through the guidance of the arc-shaped tank bottom and the guide ring sleeve, thereby mixing and agitating the wastewater, promoting sludge suspension, and promoting the balance of water quality in the regulating tank. A flow meter can be connected in series on the water supply pipe to measure the amount of wastewater entering the intelligent homogenizing regulating tank.

[0007] Furthermore, the homogenizing stirring mechanism includes a hollow shaft. The hollow shaft is located at the center of the regulating tank and is rotatably connected to the middle of the bridge plate. The top of the hollow shaft is connected to the stirring power assembly, and the bottom of the hollow shaft is fixedly connected to the top center of the hollow turntable. The outer periphery of the hollow turntable is rotatably connected to multiple horizontal stirring spokes through multiple sealed bearings distributed in a ring array. One end of the stirring spoke located inside the hollow turntable is fixedly connected to an internal gear. The top center of the hollow water distribution plate is fixedly connected to the bottom end of a fixed shaft. The top of the fixed shaft is located at the bottom of the hollow turntable and is fixedly connected to the center of an end face gear. The end face gear meshes with each internal gear. The end of the stirring spoke away from the internal gear is fixedly connected to the middle of the stirring rotor. The stirring power unit drives the hollow shaft to rotate relative to the bridge plate. The hollow shaft drives the hollow turntable to rotate, and the hollow turntable drives the stirring spokes to rotate around the hollow shaft. Since the end gear is fixed to the hollow water distribution plate through the fixed shaft, and the end gear is meshed with the internal gear, when the hollow water distribution plate rotates, it can not only drive the stirring spokes to rotate around the hollow shaft, but also drive the stirring spindle to rotate around the center of the stirring spokes. The stirring spindle achieves synchronous revolution and rotation, which is conducive to fully stirring the sewage in the intelligent homogenizing tank, allowing the newly entered industrial wastewater to mix with the original sewage, and promoting the balance of water quality in the intelligent homogenizing tank. The sealed bearing can prevent sewage from entering the hollow turntable. In order to install the end gear and internal gear in the hollow turntable, the hollow turntable is divided into a hollow disc body and a disc bottom, which are fixedly connected by screws.

[0008] Furthermore, it also includes an aeration mechanism for the regulating tank, which includes an arc-shaped rotating aeration pipe. The bottom edge of the hollow turntable is connected to one end of multiple arc-shaped rotating aeration pipes in a ring array. Aeration heads are arranged at equal intervals on the upper side of the arc-shaped rotating aeration pipes. Fixed aeration components are arranged in a ring array on the upper side of the arc-shaped tank bottom. The top of the hollow shaft and the top of the fixed aeration components are both connected to an air source supply component. The air supply component supplies air to the fixed aeration component, which allows aeration to be performed at a fixed position within the intelligent homogenizing tank. This inhibits anaerobic putrefaction, prevents water quality deterioration, and promotes water quality stability within the tank. Simultaneously, the air supply component also supplies air to the hollow shaft, which allows air to enter the hollow rotating disc and then the arc-shaped rotating aeration pipe. The arc-shaped rotating aeration pipe, through its aeration heads, evenly distributes air into the wastewater within the tank, achieving aeration. Because the arc-shaped rotating aeration pipe rotates with the hollow rotating disc, aeration is more uniform, and its rotation is not interfered with by the fixed aeration component.

[0009] Furthermore, the hydrolysis acidification-membrane separation coupling tank includes a hydrolysis acidification tank body located below the regulating tank body. An arc-shaped partition plate is installed within the hydrolysis acidification tank body. The space above the arc-shaped partition plate within the hydrolysis acidification tank body is the hydrolysis acidification chamber, and the space below the arc-shaped partition plate is the carbon source recovery and storage chamber. A support ring is installed at the bottom of the arc-shaped tank bottom, and the support ring is connected to the arc-shaped partition plate via multiple supports arranged in a ring array. The support ring and supports constitute the support frame of the regulating tank body, stabilizing the configuration of the regulating tank body and the hydrolysis acidification tank body. The facultative anaerobic bacteria and fermenting bacteria in the hydrolysis acidification chamber can achieve the hydrolysis acidification of wastewater, efficiently converting recalcitrant large organic molecules into easily biodegradable small molecule carbon sources such as volatile fatty acids. The carbon source recovery and storage chamber can send the enriched volatile fatty acids and other carbon sources into the carbon source recovery and storage chamber for preservation. The carbon source recovery and storage chamber maintains a sealed and low-temperature condition, preventing carbon source volatilization and deterioration.

[0010] Furthermore, it also includes a sludge suspension and agitation mechanism, which comprises a sewage pumping assembly, a central fixed pipe, a rotary joint II, a rotating drum, a waterproof power assembly, and hollow water distribution inclined plates. The central fixed pipe is centrally fixed to the arc-shaped partition plate. The bottom end of the central fixed pipe is connected to the bottom of the static buffer chamber through the sewage pumping assembly. The top end of the central fixed pipe is connected to the bottom end of the rotating drum through the rotary joint II. The top end of the rotating drum is connected to the waterproof power assembly. Four hollow water distribution inclined plates are arranged in a ring array on the outer periphery of the rotating drum, and the hollow water distribution inclined plates are connected to the interior of the rotating drum. Wastewater in the settling buffer chamber is pumped into the central fixed pipe by the wastewater pumping assembly. Then, the wastewater enters the rotating drum and is dispersed into the hydrolysis acidification chamber by the hollow water distribution inclined plate. The waterproof power assembly drives the rotating drum and the hollow water distribution inclined plate to rotate. When the hollow water distribution inclined plate disperses the wastewater into the hydrolysis acidification chamber, it also agitates the wastewater in the hydrolysis acidification chamber, causing the wastewater in the hydrolysis acidification chamber to rotate, promoting the suspension of sludge in the hydrolysis acidification chamber, and promoting the hydrolysis acidification process. The central fixed pipe and the rotating drum are connected by a rotary joint two. Rotary joint two acts as a sealed rotary connector for 360° rotating medium transport, allowing the rotating drum to maintain communication with the central fixed pipe while rotating.

[0011] Furthermore, it also includes a built-in membrane separation mechanism, which includes a membrane separation cylinder and a hollow fiber ultrafiltration membrane. Multiple mounting bottom pipes are arranged in a ring array along the upper edge of the arc-shaped partition plate. The bottom end of the mounting bottom pipe passes through the side of the hydrolysis acidification tank and is connected to the centralized pumping component. The top of the mounting bottom pipe is threaded to the bottom end of the water collecting cone sleeve. The top of the water collecting cone sleeve is threaded to the bottom of the membrane separation cylinder. Six separation cylinder slots are arranged in a ring array on the outer periphery of the membrane separation cylinder. A base plate is provided at the bottom of the membrane separation cylinder, and a top plate is provided at the top of the membrane separation cylinder. A release groove is provided on the top plate. Vertical hollow fiber ultrafiltration membranes are evenly arranged between the base plate and the top plate. The top of the hollow fiber ultrafiltration membrane is closed, and the opening at the bottom of the hollow fiber ultrafiltration membrane is located at the top of the water collecting cone sleeve. When the sludge suspension agitator stirs the wastewater, it also allows the wastewater to come into contact with the hollow fiber ultrafiltration membrane through the separation tank. The volatile fatty acids produced by the decomposition of wastewater can pass through the hollow fiber ultrafiltration membrane and be enriched inside the membrane, collected in the water collection cone, and then enter the centralized pumping component through the bottom pipe. The centralized pumping component sends the volatile fatty acids to the carbon source recovery and storage chamber for storage. The bottom and top plates vertically straighten the hollow fiber ultrafiltration membrane, maintaining a gap between adjacent membranes to achieve efficient separation by the hollow fiber ultrafiltration membrane. If it is necessary to increase the water pressure in the hydrolysis acidification chamber to accelerate the separation effect, an additional annular cover plate is required to seal the top of the hydrolysis acidification tank.

[0012] Furthermore, it also includes an aeration and cleaning system, which comprises an annular aeration and cleaning pipe, cleaning aeration heads, and a high-pressure air supply component. The annular aeration and cleaning pipe is located at the bottom of the membrane separation cylinder, and the cleaning aeration heads are arranged in a circular array at the top of the annular aeration and cleaning pipe. The high-pressure air supply component is connected to the side of the annular aeration and cleaning pipe. Because sludge accumulates on the outside of the hollow fiber ultrafiltration membrane after prolonged use, and this sludge can block volatile fatty acids from passing through the membrane, reducing the separation efficiency, it is necessary to clean the outside of the hollow fiber ultrafiltration membrane regularly. Therefore, the aeration and cleaning system is installed. The high-pressure air supply component in the aeration and cleaning system supplies high-pressure air to the annular aeration and cleaning pipe, which is then discharged to the bottom of the membrane separation cylinder through the cleaning aeration heads. The high-pressure air effectively washes away the sludge adhering to the outside of the hollow fiber ultrafiltration membrane.

[0013] Furthermore, the aeration and cleaning system also includes a closed cylinder, a closed cylinder groove, and a separation cylinder groove closed power assembly. A closed cylinder is rotatably sleeved on the outer side of the membrane separation cylinder. Six closed cylinder grooves are arranged in a ring array on the outer periphery of the closed cylinder. The top of the closed cylinder is connected to the separation cylinder groove closed power assembly. To improve the cleaning effect on the sludge outside the hollow fiber ultrafiltration membrane and to prevent excessive high-pressure air from entering the hydrolysis acidification chamber during cleaning and disrupting its internal low-oxygen or micro-anaerobic environment, a closed cylinder is installed. When the hollow fiber ultrafiltration membrane needs cleaning, the separation cylinder groove closed power assembly drives the closed cylinder to rotate, causing the closed cylinder grooves on the closed cylinder to be staggered with the separation cylinder grooves. At this time, the separation cylinder grooves are closed by the closed cylinder, creating a narrow, sealed environment inside the membrane separation cylinder. During aeration and cleaning, the high-pressure air is more concentrated, resulting in a higher cleaning effect on the outer side of the hollow fiber ultrafiltration membrane. This also prevents excessive contact between the aerated air and the wastewater inside the hydrolysis acidification chamber, avoiding disruption of the low-oxygen or micro-anaerobic environment within the hydrolysis acidification chamber. Excess high-pressure air can be released through a release groove.

[0014] Furthermore, the intelligent dosing unit includes an online water quality monitor, a controller, and dosing components. The controller and dosing components are respectively installed on the bridge plate, and the online water quality monitor is connected to the inner wall of the flow-guiding annular sleeve. The detection end of the online water quality monitor is located inside the flow-guiding annular sleeve and is used to detect the pH value, oxidation-reduction potential (ORP), and chemical oxygen demand (COD) of the wastewater. The online water quality monitor is equipped with appropriate monitoring instruments as needed.

[0015] Compared with existing technologies, the beneficial effects of this intelligent regulating tank system for carbon source recovery are: 1. This intelligent equalization tank system for carbon source recovery sends industrial wastewater downwards into the center of the bottom of the equalization tank through the water distribution mechanism. After flowing downwards and encountering the arc-shaped bottom of the tank, the industrial wastewater turns back upwards. The upward-turning industrial wastewater is then guided by the flow-guiding ring sleeve and converges at the center of the top of the equalization tank. This process can stir up the sludge deposited on the upper side of the arc-shaped bottom of the tank and promote the full mixing of industrial wastewater with the sewage in the equalization tank, thereby improving the buffering capacity against the shock load of the influent. The intelligent dosing unit can add pH adjusting agents according to the pH of the sewage in the equalization tank.

[0016] 2. This intelligent regulating tank system for carbon source recovery allows water in the regulating tank to pass over the top of the guide ring sleeve and enter the static buffer chamber. It then enters the hydrolysis-acidification-membrane separation coupling tank for hydrolysis-acidification, efficiently converting recalcitrant large organic molecules into easily biodegradable small carbon sources such as volatile fatty acids. The static buffer chamber keeps the water still, reducing oxygen content and preventing high-oxygen wastewater from entering the hydrolysis-acidification-membrane separation coupling tank and affecting its required low-oxygen or micro-anaerobic environment. The overflow height control component controls the flow of wastewater from the regulating tank into the static buffer chamber. Even if the inflow rate and water level in the regulating tank decrease, a certain amount of wastewater can still enter the static buffer chamber, achieving the function of balancing the water volume in the regulating tank.

[0017] 3. This intelligent equalization tank system for carbon source recovery monitors and pre-regulates the influent water quality in real time through an intelligent equalization tank. It has a strong buffering capacity against influent shock loads, ensuring that the wastewater entering the hydrolysis acidification chamber is under optimal reaction conditions. The hydrolysis acidification tank is coupled with a built-in membrane separation mechanism. By controlling the hydraulic retention time and sludge retention time, it efficiently converts recalcitrant macromolecular organic matter into easily biodegradable small molecule carbon sources such as volatile fatty acids. The recovered carbon sources are then enriched and recovered using membrane separation. The recovered carbon sources can be directly used in subsequent biological nitrogen and phosphorus removal processes, effectively solving the problem of insufficient carbon sources in the nitrogen and phosphorus removal of low carbon-to-nitrogen ratio industrial wastewater. At the same time, it significantly improves the biodegradability of wastewater, reduces the treatment load of subsequent processes and the cost of external carbon sources, and realizes resource recovery and energy saving in the industrial wastewater treatment process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the intelligent regulating tank system for carbon source recovery according to the present invention; Figure 2 For the present invention Figure 1 A magnified view of the structure at point A in the middle; Figure 3 This is a side view of the intelligent regulating tank system for carbon source recovery according to the present invention. Figure 4 This is a top view schematic diagram of the intelligent regulating tank system for carbon source recovery according to the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at point B in the middle; Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure at point D in the middle; Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure at point E in the middle; Figure 8 For the present invention Figure 4 Schematic diagram of the cross-sectional structure at point C; Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point F in the middle; Figure 10 This is a partial structural schematic diagram of the intelligent regulating tank system for carbon source recovery according to the present invention; Figure 11 For the present invention Figure 10 A schematic diagram of the vertical cross-sectional structure; In the diagram: 1 Intelligent homogenizing and regulating tank, 11 Regulating tank body, 12 Arc-shaped tank bottom, 13 Guide ring sleeve, 14 Overflow sleeve, 15 Overflow groove, 16 Bridge plate, 17 Electric telescopic rod, 18 Overflow height control sleeve, 2 Regulating tank water distribution mechanism, 21 Water distribution hood, 22 Hollow water distribution plate, 23 Water distribution hole, 24 Water delivery pipe, 3 Homogenizing and stirring mechanism, 31 Hollow shaft, 32 Stirring motor, 33 Driving gear, 34 Driven gear, 35 Fixed shaft, 36 End face gear, 37 Hollow turntable, 3 8. Sealing ring, 39. Sealed bearing, 310. Stirring spoke, 311. Stirring rotor, 312. Internal gear, 4. Aeration mechanism of regulating tank, 41. Aeration pump, 42. Branch pipe, 43. Solenoid valve I, 44. Rotary joint I, 45. Arc-shaped rotary aeration pipe, 46. Aeration head I, 47. Annular air channel, 48. Arc-shaped fixed aeration pipe, 49. Aeration head II, 5. Hydrolysis acidification-membrane separation coupling tank, 51. Hydrolysis acidification tank body, 52. Arc-shaped partition plate, 53. Supporting spoke plate, 54. Support ring, 55. Support frame, 6. Sludge suspension Agitator, 61 Water Pipe 1, 62 Transfer Water Pump, 63 Water Pipe 2, 64 Center Fixed Pipe, 65 Rotary Joint 2, 66 Rotary Drum, 67 Motor Plate, 68 Waterproof Motor, 69 Hollow Water Distribution Inclined Plate, 7 Built-in Membrane Separation Mechanism, 71 Installation Bottom Pipe, 72 Water Collection Cone Sleeve, 73 Chassis, 74 Membrane Separation Cylinder, 75 Separation Cylinder Tank, 76 Hollow Fiber Ultrafiltration Membrane, 77 Top Plate, 78 Release Tank, 79 Release Cone Sleeve, 710 Solenoid Valve 2, 711 Water Collection Ring Pipe, 712 Product Water Suction Pump 713 Inlet pipe, 8 Aeration and cleaning system, 81 Enclosed cylinder, 82 Enclosed cylinder groove, 83 External gear ring, 84 Inner ring, 85 Internal gear ring, 86 Enclosed control motor, 87 Drive gear, 88 Annular aeration and cleaning pipe, 89 Cleaning aeration head, 810 Air supply branch pipe, 811 Annular air collection pipe, 812 Pressure air pipe, 813 High-pressure air pump, 9 Intelligent dosing unit, 91 Online water quality monitor, 92 Controller, 93 Dosing tank, 94 Addition pipe, 95 Corrosion-resistant electric regulating valve, 96 Round cover. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1, please refer to Figures 1 to 11This embodiment provides a technical solution: an intelligent regulating tank system for carbon source recovery, including an intelligent homogenizing regulating tank 1. The intelligent homogenizing regulating tank 1 includes a regulating tank body 11, an arc-shaped tank bottom 12, and a bridge plate 16. The bottom of the regulating tank body 11 is integrally formed and connected to the arc-shaped tank bottom 12. The top of the regulating tank body 11 is provided with the bridge plate 16. The intelligent homogenizing regulating tank 1 also includes a flow guiding annular sleeve 13 and an overflow height control component. The bottom end of the flow guiding annular sleeve 13 is integrally formed and connected to the inner side of the middle part of the regulating tank body 11. The annular area between the flow guiding annular sleeve 13 and the top of the regulating tank body 11 is a static buffer chamber. The overflow height control component is installed on the top of the flow guiding annular sleeve 13.

[0021] The overflow height control assembly includes an overflow sleeve 14, overflow grooves 15, electric telescopic rods 17, and an overflow height control sleeve 18. The top of the guide ring sleeve 13 is integrally formed and connected to the bottom of the overflow sleeve 14. The top of the overflow sleeve 14 has multiple overflow grooves 15 arranged in a ring array. The number of overflow grooves 15 can be selected as needed, but is generally no less than twelve. The overflow height control sleeve 18 is vertically slidably fitted onto the outer side of the overflow sleeve 14. The top two sides of the overflow height control sleeve 18 are respectively connected to the telescopic ends of the bottom of two electric telescopic rods 17. The fixed ends of the electric telescopic rods 17 are installed on the bridge plate 16 to adjust the sewage level in the regulating tank 11. Inside the overflow sleeve 14, sewage in the regulating tank 11 can overflow into the settling buffer chamber through the overflow groove 15. The electric telescopic rod 17 extends and retracts, causing the overflow height control sleeve 18 to move up and down, which can control the blocking height at the bottom of the overflow groove 15. The overflow height can be changed according to the amount of sewage in the regulating tank 11. When the water volume in the regulating tank 11 decreases and the liquid level drops, the overflow height control sleeve 18 can be moved downward to avoid reducing the amount of water overflowing into the settling buffer chamber. When the water volume in the regulating tank 11 increases and the liquid level rises, the overflow height control sleeve 18 can be moved upward to reduce the amount of water overflowing into the settling buffer chamber.

[0022] It is also equipped with a water distribution mechanism 2 for regulating tank, a homogenizing and stirring mechanism 3, a hydrolysis acidification-membrane separation coupling tank 5, and an intelligent dosing unit 9.

[0023] The water distribution mechanism 2 of the regulating pool is installed in the middle of the arc-shaped pool bottom 12.

[0024] The water distribution mechanism 2 of the regulating tank includes a water distribution cover 21, a hollow water distribution plate 22, water distribution holes 23, and a water delivery pipe 24. The water distribution cover 21 is formed by the upward protrusion of the middle part of the arc-shaped tank bottom 12. The hollow water distribution plate 22 is fixedly connected to the top of the water distribution cover 21. Multiple water distribution holes 23 are arranged in a ring array along the bottom edge of the hollow water distribution plate 22. There are six water distribution holes 23. One end of the water delivery pipe 24 is connected to the bottom center of the hollow water distribution plate 22. The water delivery pipe 24 is distributed along the lower side of the arc-shaped tank bottom 12. The other end of the water delivery pipe 24 passes through the side wall of the hydrolysis acidification tank body 51 and is connected to the outlet of the external sewage pump. An external sewage pump delivers industrial wastewater through a water delivery pipe 24 into a hollow water distribution plate 22. The wastewater is then dispersed downwards through water distribution holes 23. The downward flow of water encounters a water distribution cover 21 and then disperses in all directions. The water then encounters an arc-shaped pool bottom 12 and a flow-guiding annular sleeve 13 in sequence. The flow from the water distribution holes 23 is guided by the arc-shaped pool bottom 12 and the flow-guiding annular sleeve 13, causing the sludge at the bottom to be stirred up, thus mixing and agitating the wastewater, promoting the suspension of the sludge, and also promoting the balance of water quality in the equalization tank. A flow meter can be connected in series on the water delivery pipe 24 to measure the amount of wastewater entering the intelligent equalization tank 1.

[0025] The homogenizing and stirring mechanism 3 is installed in the middle of the regulating tank 11.

[0026] The homogenizing stirring mechanism 3 includes a hollow shaft 31, a stirring power assembly, a fixed shaft 35, an end face gear 36, a hollow turntable 37, sealed bearings 39, stirring spokes 310, stirring rods 311, and an internal gear 312. The hollow shaft 31 is located at the center of the regulating tank 11. The hollow shaft 31 is rotatably connected to the center of the bridge plate 16 via bearings. The top of the hollow shaft 31 is connected to the stirring power assembly, and the bottom of the hollow shaft 31 is fixedly connected to the top center of the hollow turntable 37. Multiple horizontal stirring spokes 31 are rotatably connected to the outer periphery of the hollow turntable 37 via a ring-shaped array of sealed bearings 39. Six sealing bearings 39 and six stirring spokes 310 are provided. One end of the stirring spoke 310 located inside the hollow turntable 37 is fixedly connected to an internal gear 312. The bottom end of the fixed shaft 35 is fixedly connected to the top center of the hollow water distribution plate 22. The fixed shaft 35 is rotatably connected to the bottom center of the hollow turntable 37 through the turntable sealing bearing. The top of the fixed shaft 35 is located at the bottom of the hollow turntable 37 and is fixedly connected to the center of the end face gear 36. The end face gear 36 meshes with each of the internal gears 312. The end of the stirring spoke 310 away from the internal gear 312 is fixedly connected to the middle of the stirring rod 311.

[0027] The homogenizing mixing mechanism 3 also includes sealing rings 38. Two sealing rings 38 with different diameters are provided between the bottom of the hollow turntable 37 and the top of the hollow water distribution plate 22. The sealing rings 38 are rubber rings. Both the bottom of the hollow turntable 37 and the top of the hollow water distribution plate 22 are provided with sealing ring grooves that cooperate with the sealing rings 38. The sealing rings 38 prevent water from entering between the hollow turntable 37 and the hollow water distribution plate 22, thereby preventing sewage from entering the hollow turntable 37 through the connection between the fixed shaft 35 and the hollow turntable 37.

[0028] The stirring power assembly includes a stirring motor 32, a driving gear 33, and a driven gear 34. The driven gear 34 is fixedly sleeved on the top of the hollow shaft 31. The stirring motor 32 is mounted on the top of the bridge plate 16. The output shaft of the stirring motor 32 is fixedly connected to the driving gear 33. The driving gear 33 and the driven gear 34 are meshed. When the stirring motor 32 works, it drives the hollow shaft 31 to rotate through the speed change transmission of the driving gear 33 and the driven gear 34.

[0029] The stirring power assembly drives the hollow shaft 31 to rotate relative to the bridge plate 16. The hollow shaft 31 drives the hollow turntable 37 to rotate, and the hollow turntable 37 drives the stirring spoke 310 to rotate around the hollow shaft 31. Since the end face gear 36 is fixed to the hollow water distribution plate 22 through the fixed shaft 35, and the end face gear 36 is meshed with the internal gear 312, when the hollow water distribution plate 22 rotates, it can not only drive the stirring spoke 310 to rotate around the hollow shaft 31, but also allow the stirring spoke 310 to drive the stirring rod 311 to rotate. The stirring shaft 310 rotates at its center, and the stirring rod 311 rotates synchronously around the sun and on its own axis, which helps to fully agitate the sewage in the intelligent homogenizing tank 1, allowing the newly introduced industrial wastewater to mix with the original sewage, and promoting the balance of water quality in the intelligent homogenizing tank 1. The sealed bearing 39 can prevent sewage from entering the hollow turntable 37. In order to install the end face gear 36 and the internal gear 312 in the hollow turntable 37, the hollow turntable 37 is divided into a hollow disc body and a disc bottom, which are fixedly connected by screws.

[0030] The hydrolysis acidification-membrane separation coupling tank 5 is installed below the conditioning tank 11.

[0031] The hydrolysis acidification-membrane separation coupling tank 5 includes a hydrolysis acidification tank body 51, an arc-shaped partition plate 52, a support ring 54, and a bracket 55. The hydrolysis acidification tank body 51 is located below the regulating tank body 11, and the top of the hydrolysis acidification tank body 51 is flush with the bottom of the regulating tank body 11. An arc-shaped partition plate 52 is installed inside the hydrolysis acidification tank body 51. The space above the arc-shaped partition plate 52 inside the hydrolysis acidification tank body 51 is the hydrolysis acidification chamber, and the space below the arc-shaped partition plate 52 inside the hydrolysis acidification tank body 51 is the carbon source recovery and storage chamber. A support ring 54 is installed at the bottom of the arc-shaped tank bottom 12. The support ring 54 is connected to the arc-shaped partition plate 52 through multiple brackets 55 arranged in a ring array. The specific number of brackets 55 can be selected as needed, but is generally no less than six.

[0032] The hydrolysis acidification-membrane separation coupling tank 5 also includes a support plate 53. The bottom outer periphery of the regulating tank body 11 is fixedly connected to the top of the hydrolysis acidification tank body 51 through a ring array of multiple support plates 53, which are used to support the installation of the regulating tank body 11 on the hydrolysis acidification tank body 51. The number of support plates 53 is not less than nine.

[0033] The optimal pH value for hydrolysis and acidification is 5.5 to 6.5.

[0034] Both the arc-shaped bottom 12 and the arc-shaped partition plate 52 are concave arc-shaped structures. The support ring 54 and the bracket 55 constitute the support frame of the regulating tank, stabilizing the configuration of the regulating tank 11 and the hydrolysis acidification tank 51. The facultative anaerobic bacteria and fermenting bacteria in the hydrolysis acidification chamber can realize the hydrolysis acidification of wastewater, and can efficiently convert the recalcitrant large organic molecules into easily biodegradable small molecule carbon sources such as volatile fatty acids. The carbon source recovery and storage chamber can send the enriched volatile fatty acids and other carbon sources into the carbon source recovery and storage chamber for storage. The carbon source recovery and storage chamber is conducive to maintaining a sealed and low-temperature condition, which can prevent the carbon source from volatilizing and deteriorating.

[0035] The intelligent dosing unit 9 is installed on the bridge plate 16.

[0036] The intelligent dosing unit 9 includes an online water quality monitor 91, a controller 92, and a dosing assembly. The controller 92 and the dosing assembly are installed on the bridge plate 16, and the online water quality monitor 91 is connected to the inner wall of the flow guide annular sleeve 13.

[0037] The dosing assembly includes a dosing tank 93, an adding pipe 94, a corrosion-resistant electric regulating valve 95, and a round cover 96. The dosing tank 93 is mounted on the bridge plate 16. The bottom of the dosing tank 93 is connected to the top of the adding pipe 94. The corrosion-resistant electric regulating valve 95 is installed in the middle of the adding pipe 94. The dosing port of the dosing tank 93 is threadedly connected to the round cover 96. By opening the round cover 96, dilute sulfuric acid can be added into the dosing tank 93 through the dosing port. Other agents can also be added into the dosing tank 93 as needed. The controller 92 can control the corrosion-resistant electric regulating valve 95 to open, so that the agents in the dosing tank 93 can be added into the equalization tank 11 through the adding pipe 94, thereby adjusting the pH of the sewage in the equalization tank 11. The online water quality monitor 91 adopts existing technology. The output end of the controller 92 is electrically connected to the input end of the online water quality monitor 91 and the corrosion-resistant electric regulating valve 95. The data detected by the online water quality monitor 91 is also transmitted to the controller 92 in the form of an electrical signal.

[0038] The detection end of the online water quality monitor 91 is located inside the flow guiding annular sleeve 13 and is used to detect the pH value, oxidation-reduction potential (ORP), and chemical oxygen demand (COD) of wastewater. The online water quality monitor 91 is equipped with corresponding monitoring instruments as needed.

[0039] In operation, industrial wastewater is fed downwards into the center of the bottom of the regulating tank 11 through the water distribution mechanism 2. After flowing downwards and encountering the curved bottom 12, the wastewater turns upwards and is then guided by the flow-guiding ring 13 to converge at the center of the top of the regulating tank 11. This process stirs up the sludge deposited on the upper side of the curved bottom 12 and promotes mixing between the industrial wastewater and the wastewater in the regulating tank 11, enhancing the buffering capacity against influent shock loads. The homogenizing and stirring mechanism 3 thoroughly agitates the wastewater in the regulating tank 11, ensuring thorough mixing of newly introduced wastewater with existing wastewater and facilitating water quality homogenization. The intelligent dosing unit 9 adds pH-adjusting agents, typically dilute sulfuric acid, to adjust the pH of the wastewater in the regulating tank 11 to approximately 6.0. Simultaneously, the wastewater in the regulating tank 11 is aerated to prevent... To prevent water quality deterioration in the equalization tank 11 and ensure the stability of subsequent processes, while also improving the treatability of wastewater, the addition of chemicals and aeration pre-condition and homogenize the water quality inside the equalization tank 11. The water in the equalization tank 11 passes over the top of the guide ring sleeve 13 and enters the settling buffer chamber, and then enters the hydrolysis acidification-membrane separation coupling tank 5 for hydrolysis acidification. This efficiently converts recalcitrant large organic molecules into easily biodegradable small carbon sources such as volatile fatty acids. The settling buffer chamber keeps the water still and reduces the oxygen content, preventing high-oxygen wastewater from entering the hydrolysis acidification-membrane separation coupling tank 5 and affecting the low-oxygen or micro-anaerobic environment required inside. The overflow height control component can control the flow of wastewater from the equalization tank 11 into the settling buffer chamber. Even if the inflow rate and water level in the equalization tank 11 decrease, a certain amount of wastewater can still enter the settling buffer chamber, thus achieving the function of equalizing the water volume in the equalization tank 11.

[0040] Example 2, please refer to Figures 1 to 11 This embodiment provides a technical solution: an intelligent regulating pool system for carbon source recovery. This embodiment has a roughly the same structure as Embodiment 1, with the difference being: An aeration mechanism 4 for the regulating tank is also provided. The aeration mechanism 4 includes an arc-shaped rotating aeration pipe 45, an aeration head 46, an air source supply component, and a fixed aeration component. The bottom edge of the hollow turntable 37 is connected to one end of multiple arc-shaped rotating aeration pipes 45 in a ring array. Specifically, there are six arc-shaped rotating aeration pipes 45. The arc-shaped rotating aeration pipes 45 are distributed along the side of the water distribution cover 21. The other end of the arc-shaped rotating aeration pipes 45 is closed. The aeration heads 46 are arranged at equal intervals on the upper side of the arc-shaped rotating aeration pipes 45. The fixed aeration component is arranged in a ring array on the upper side of the arc-shaped tank bottom 12. The top of the hollow shaft 31 and the top of the fixed aeration component are both connected to the air source supply component.

[0041] The fixed aeration assembly includes an annular air channel 47, an arc-shaped fixed aeration pipe 48, and aeration heads 49. The annular air channel 47 is provided on the inner wall of the middle part of the regulating tank 11. The bottom of the annular air channel 47 is connected to the top of six arc-shaped fixed aeration pipes 48 in an annular array. The arc-shaped fixed aeration pipes 48 are located near the upper side of the arc-shaped tank bottom 12. The bottom end of the arc-shaped fixed aeration pipes 48 is closed. Aeration heads 49 are arranged at equal intervals on the upper side of the arc-shaped fixed aeration pipes 48. Air is introduced into the annular air channel 47, and the air is aerated at a fixed position through the aeration heads 49 on the arc-shaped fixed aeration pipes 48.

[0042] The air supply assembly includes an aeration pump 41, branch pipes 42, a solenoid valve 43, and a rotary joint 44. The aeration pump 41 is mounted on the bridge plate 16. The outlet of the aeration pump 41 is connected to one end of two branch pipes 42. The other end of one branch pipe 42 is connected to the top of the hollow shaft 31 through the rotary joint 44. When the hollow shaft 31 rotates relative to the branch pipe 42, the rotary joint 44 can ensure that the two maintain the state of medium conduction. The other end of the other branch pipe 42 is connected to an annular air passage 47. A solenoid valve 43 is connected in series on each of the two branch pipes 42. When the aeration pump 41 is working, it can pump air into the hollow shaft 31 and the annular air passage 47 through the two branch pipes 42 respectively. The solenoid valve 43 can control the opening and closing of the two branch pipes 42, thereby controlling the pumping of air into the hollow shaft 31 or the annular air passage 47.

[0043] The air supply component supplies air to the fixed aeration component, which allows aeration to be performed at a fixed position within the regulating tank 11. This inhibits anaerobic putrefaction, prevents water quality deterioration, and promotes water quality stability within the regulating tank 11. Simultaneously, the air supply component also supplies air to the hollow shaft 31, which allows air to enter the hollow rotating disc 37 and then the arc-shaped rotating aeration pipe 45. The arc-shaped rotating aeration pipe 45, through the aeration head 46, evenly distributes air into the wastewater within the regulating tank 11, achieving aeration. Because the arc-shaped rotating aeration pipe 45 rotates with the hollow rotating disc 37, the aeration is more uniform, and the rotation of the arc-shaped rotating aeration pipe 45 is not interfered with by the fixed aeration component.

[0044] Example 3, please refer to Figures 1 to 11 This embodiment provides a technical solution: an intelligent regulating pool system for carbon source recovery. This embodiment is structurally similar to Embodiment 2, with the difference being: It is also equipped with a sludge suspension and agitation mechanism 6, which includes a sewage pumping component, a central fixed pipe 64, a rotary joint 65, a rotating drum 66, a waterproof power component, and hollow water distribution inclined plates 69. The central fixed pipe 64 is centrally fixed to the arc-shaped partition plate 52. The bottom end of the central fixed pipe 64 is connected to the bottom of the static buffer chamber through the sewage pumping component. The top of the central fixed pipe 64 is connected to the bottom end of the rotating drum 66 through the rotary joint 65. The top of the rotating drum 66 is connected to the waterproof power component, which is installed inside the support ring 54. Four hollow water distribution inclined plates 69 are arranged in a ring array on the outer periphery of the rotating drum 66. The hollow water distribution inclined plates 69 are connected to the interior of the rotating drum 66.

[0045] The sewage pumping assembly includes a first water pipe 61, a transfer pump 62, and a second water pipe 63. The bottom of the settling buffer chamber is connected to one end of the first water pipe 61, the other end of the first water pipe 61 is connected to the inlet of the transfer pump 62, the outlet of the transfer pump 62 is connected to one end of the second water pipe 63, and the other end of the second water pipe 63 is connected to the bottom of the central fixed pipe 64. The transfer pump 62 can send the sewage that has been settling in the settling buffer chamber into the central fixed pipe 64.

[0046] The waterproof power assembly includes a motor plate 67 and a waterproof motor 68. The motor plate 67 is located inside the support ring 54, and the waterproof motor 68 is mounted on the motor plate 67. The output shaft at the bottom of the waterproof motor 68 is fixedly connected to the top center of the rotating drum 66. When the waterproof motor 68 is working, it drives the rotating drum 66 to rotate.

[0047] Wastewater in the settling buffer chamber is pumped into the central fixed pipe 64 by the wastewater pumping assembly, and then enters the rotating drum 66. It is then dispersed into the hydrolysis acidification chamber by the hollow water distribution inclined plate 69. The waterproof power assembly drives the rotating drum 66 and the hollow water distribution inclined plate 69 to rotate. When the hollow water distribution inclined plate 69 disperses the wastewater into the hydrolysis acidification chamber, it also agitates the wastewater in the hydrolysis acidification chamber, causing the wastewater in the hydrolysis acidification chamber to rotate, promoting the suspension of sludge in the hydrolysis acidification chamber, and promoting the hydrolysis acidification process. The central fixed pipe 64 and the rotating drum 66 are connected by a rotary joint 65. The rotary joint 65 acts as a sealed rotary connector for 360° rotating medium transport, allowing the rotating drum 66 to maintain communication with the central fixed pipe 64 while rotating.

[0048] Example 4, please refer to Figures 1 to 11 This embodiment provides a technical solution: an intelligent regulating pool system for carbon source recovery. This embodiment is structurally similar to Embodiment 3, with the difference being: It also includes a built-in membrane separation mechanism 7 and an aeration and cleaning system 8. The built-in membrane separation mechanism 7 includes an installation base pipe 71, a water collection cone sleeve 72, a chassis 73, a membrane separation cylinder 74, a separation cylinder trough 75, a hollow fiber ultrafiltration membrane 76, a top plate 77, a release tank 78, and a centralized pumping assembly. Multiple installation base pipes 71 are arranged in a ring array along the upper edge of the arc-shaped partition plate 52. The number of installation base pipes 71 is not less than nine. The bottom end of the installation base pipe 71 passes through the side of the hydrolysis acidification tank body 51 and connects to the centralized pumping assembly. The top of the installation base pipe 71 is threaded. The bottom end of the water collecting cone sleeve 72 is connected to the bottom of the membrane separation cylinder 74, and the top of the water collecting cone sleeve 72 is threaded to the bottom of the membrane separation cylinder 74. Six separation cylinder grooves 75 are arranged in annular array on the outer periphery of the membrane separation cylinder 74. A base plate 73 is provided at the bottom of the membrane separation cylinder 74, and a top plate 77 is provided at the top of the membrane separation cylinder 74. A release groove 78 is provided on the top plate 77. Vertical hollow fiber ultrafiltration membranes 76 are evenly arranged between the base plate 73 and the top plate 77. The top of the hollow fiber ultrafiltration membrane 76 is closed, and the opening at the bottom of the hollow fiber ultrafiltration membrane 76 is located at the top of the water collecting cone sleeve 72.

[0049] The centralized pumping assembly includes a water collection annular pipe 711, a product water suction pump 712, and an inlet pipe 713. The water collection annular pipe 711 is installed on the outer side of the bottom of the hydrolysis acidification tank 51. The water collection annular pipe 711 is connected to the bottom end of the mounting base pipe 71. The outlet end of the bottom of the water collection annular pipe 711 is connected to the inlet of the product water suction pump 712. The outlet of the product water suction pump 712 is connected to the top of the carbon source recovery storage chamber through the inlet pipe 713. The volatile fatty acids separated and enriched by the hollow fiber ultrafiltration membrane 76 can be collected into the water collection annular pipe 711 through the water collection cone sleeve 72 and the mounting base pipe 71. The product water suction pump 712 sends the volatile fatty acids in the water collection annular pipe 711 into the carbon source recovery storage chamber for storage through the inlet pipe 713. A valve is installed at the outlet of the carbon source recovery storage chamber. Opening the valve can send the volatile fatty acids to the subsequent treatment unit for use.

[0050] Industrial wastewater comes into full contact with high-concentration hydrolyzed acidified sludge in the hydrolysis acidification chamber, where recalcitrant organic matter is efficiently converted into VFAs. The hollow fiber ultrafiltration membrane 76 separates the VFA-rich water (clarified liquid) from the sludge-water mixture and is then transported to the carbon source recovery and storage chamber by the product water suction pump 712. Due to the retention effect of the hollow fiber ultrafiltration membrane 76, the sludge is completely retained in the hydrolysis acidification chamber, achieving a complete separation of hydraulic retention time and sludge retention time. This allows the entire hydrolysis acidification-membrane separation coupling tank 5 to operate with a shorter hydraulic retention time (4 to 8 hours) while maintaining a longer sludge retention time (15 to 30 days), which is conducive to the growth and enrichment of slowly proliferating hydrolysis acidifying bacteria, thereby significantly improving treatment efficiency and acid decomposition yield.

[0051] The carbon source recovery storage chamber is used to store the recovered high-concentration VFAs solution. The carbon source recovery storage chamber should preferably be kept sealed and at low temperature to prevent the carbon source from volatilizing and deteriorating. The high-concentration VFAs solution, as a carbon source, can be added to the anoxic or anaerobic zone of the subsequent wastewater treatment unit as an electron donor for nitrogen and phosphorus removal.

[0052] When the sludge suspension agitation mechanism 6 agitates the wastewater, it also allows the wastewater to come into contact with the hollow fiber ultrafiltration membrane 76 through the separation tank 75. The volatile fatty acids produced by the decomposition of wastewater can pass through the hollow fiber ultrafiltration membrane 76 and be enriched inside the hollow fiber ultrafiltration membrane 76, collected in the water collection cone sleeve 72, and then enter the centralized pumping component through the installation bottom pipe 71. The centralized pumping component sends the volatile fatty acids into the carbon source recovery and storage chamber for storage. The bottom plate 73 and the top plate 77 vertically straighten the hollow fiber ultrafiltration membrane 76, maintaining a gap between adjacent hollow fiber ultrafiltration membranes 76, thus achieving efficient separation by the hollow fiber ultrafiltration membrane 76. If it is necessary to increase the water pressure in the hydrolysis acidification chamber to accelerate the separation effect, an additional annular cover plate is required to seal the top of the hydrolysis acidification tank 51.

[0053] The aeration and cleaning system 8 includes an annular aeration and cleaning pipe 88, cleaning aeration heads 89, and a high-pressure air supply component. An annular aeration and cleaning pipe 88 is respectively installed at the bottom of each membrane separation cylinder 74. Cleaning aeration heads 89 are arranged in an annular array at the top of the annular aeration and cleaning pipe 88. The high-pressure air supply component is connected to the side of the annular aeration and cleaning pipe 88.

[0054] The high-pressure air supply assembly includes an air supply branch pipe 810, an annular air collection pipe 811, a pressure air pipe 812, and a high-pressure air pump 813. An annular air collection pipe 811 is provided on the outside of the hydrolysis acidification tank 51. The sides of each annular aeration and cleaning pipe 88 are connected to the annular air collection pipe 811 through the air supply branch pipe 810. The annular air collection pipe 811 is connected to the air outlet of the high-pressure air pump 813 through the pressure air pipe 812. The high-pressure air pump 813 is installed on the bridge plate 16. The high-pressure air pump 813 sends high-pressure air into the annular air collection pipe 811 through the pressure air pipe 812. The high-pressure air is sent into the annular aeration and cleaning pipe 88 through the air supply branch pipe 810. The annular aeration and cleaning pipe 88 releases air through the cleaning aeration head 89. The sludge on the outside of the hollow fiber ultrafiltration membrane 76 is cleaned through rapid aeration.

[0055] Because sludge will adhere to the outside of the hollow fiber ultrafiltration membrane 76 after prolonged use, and the sludge will block volatile fatty acids from passing through the hollow fiber ultrafiltration membrane 76, reducing the separation effect, it is necessary to clean the outside of the hollow fiber ultrafiltration membrane 76 regularly. Therefore, an aeration cleaning system 8 is set up. The high-pressure air supply component in the aeration cleaning system 8 supplies high-pressure air to the annular aeration cleaning pipe 88, and discharges it to the bottom of the membrane separation cylinder 74 through the cleaning aeration head 89. The high-pressure air helps to clean away the sludge attached to the outside of the hollow fiber ultrafiltration membrane 76.

[0056] The aeration and cleaning system 8 also includes a closed cylinder 81, a closed cylinder groove 82, and a separation cylinder groove closed power assembly. The closed cylinder 81 is rotatably sleeved on the outside of the membrane separation cylinder 74. Six closed cylinder grooves 82 are arranged in a ring array on the outer periphery of the closed cylinder 81. The top of the closed cylinder 81 is connected to the separation cylinder groove closed power assembly.

[0057] The closed power assembly of the separation cylinder tank includes an outer gear ring 83, an inner ring 84, an inner gear ring 85, a closed control motor 86, and a drive gear 87. An inner ring 84 is provided on the inner side of the top of the hydrolysis acidification tank body 51. An inner gear ring 85 is rotatably connected to the inner side of the inner ring 84. An outer gear ring 83 is fixedly sleeved on the outer side of the top of each closed cylinder 81. Each outer gear ring 83 is meshed with the inner side of the inner gear ring 85. A closed control motor 86 is installed on one of the support spokes 53. The output shaft of the closed control motor 86 is fixedly connected to the drive gear 87. The drive gear 87 is meshed with the inner side of the inner gear ring 85. When the closed control motor 86 works, it drives the inner gear ring 85 to rotate through the drive gear 87. The inner gear ring 85 drives each closed cylinder 81 to rotate synchronously and in the same direction through meshing with each outer gear ring 83.

[0058] To improve the cleaning effect on the sludge outside the hollow fiber ultrafiltration membrane 76 and to prevent excessive high-pressure air from entering the hydrolysis acidification chamber during cleaning and disrupting its low-oxygen or micro-anaerobic environment, a closed cylinder 81 is installed. When the hollow fiber ultrafiltration membrane 76 needs to be cleaned, the separation cylinder groove sealing power component drives the closed cylinder 81 to rotate, so that the closed cylinder groove 82 on the closed cylinder 81 and the separation cylinder groove 75 are staggered. At this time, the separation cylinder groove 75 is closed by the closed cylinder 81, and the membrane separation cylinder 74 is a narrow and sealed environment. During aeration cleaning, the high-pressure air is more concentrated, resulting in a high cleaning effect on the outside of the hollow fiber ultrafiltration membrane 76. It also prevents excessive contact between the aerated air and the sewage in the hydrolysis acidification chamber, thus avoiding disruption of the low-oxygen or micro-anaerobic environment in the hydrolysis acidification chamber. Excess high-pressure air can be released through the release tank 78.

[0059] The built-in membrane separation mechanism 7 also includes a release cone sleeve 79 and a second solenoid valve 710. The top of the membrane separation cylinder 74 is threadedly connected to the release cone sleeve 79, and the top port of the release cone sleeve 79 is equipped with the second solenoid valve 710. When aeration cleaning is performed, the second solenoid valve 710 is opened to release the gas. When it is necessary to send clean water into the membrane separation cylinder 74 to clean the hollow fiber ultrafiltration membrane 76, the cleaning water can be discharged in a concentrated manner with the help of the release cone sleeve 79 and the second solenoid valve 710. The cleaning water can be directed to a suitable place through a water pipe.

[0060] When cleaning is not required, the separation cylinder groove sealing power component drives the sealing cylinder 81 to rotate, so that the sealing cylinder groove 82 on the sealing cylinder 81 is set to correspond with the separation cylinder groove 75. At this time, the sewage in the hydrolysis acidification chamber can pass through the sealing cylinder groove 82 and the separation cylinder groove 75 and then contact the hollow fiber ultrafiltration membrane 76, so that the hollow fiber ultrafiltration membrane 76 can play the role of separating and enriching volatile fatty acids.

[0061] This intelligent regulating tank system for carbon source recovery can not only effectively balance water quality and improve the biodegradability of wastewater, but also selectively enrich and recover the hydrolysis acidification products VFAs as high-quality carbon sources for reuse in subsequent wastewater treatment for nitrogen and phosphorus removal, thereby achieving the dual goals of energy conservation, consumption reduction and resource recovery.

[0062] Please see Figures 1 to 11 A wastewater treatment method for an intelligent equalization tank system for carbon source recovery includes the following steps: Step 1: Industrial wastewater enters the intelligent homogenization and equalization tank for real-time monitoring and automatic adjustment, and outputs wastewater with stable water quality. Specifically, the pH, COD and flow parameters of the influent are monitored in real time by an online water quality monitor, and the controller automatically adjusts the stirring, aeration or addition of acid and alkali reagents to keep the effluent water quality stable within the preset range. Step 2: The stabilized wastewater enters the hydrolysis acidification-membrane separation coupling tank for a highly efficient hydrolysis acidification reaction. Specifically, under the stirring action of the sludge suspension agitator, it is fully mixed with anaerobic sludge, and the recalcitrant organic matter is converted into volatile fatty acids by the hydrolysis acidification bacteria. Step 3: VFAs are enriched by membrane separation and the recovered liquid is sent to the carbon source recovery storage chamber; at the same time, the membrane module is cleaned and maintained regularly; specifically, the permeate suction pump operates intermittently to extract the clean water rich in volatile fatty acids and send it to the carbon source recovery storage chamber for storage; at the same time, the aeration and cleaning system regularly flushes the hollow fiber ultrafiltration membrane to prevent membrane fouling. Step 4: Control the sludge retention time to be longer (15 to 30 days) and the hydraulic retention time to be shorter (4 to 8 hours) to maintain the efficient and stable operation of the system. Control the sludge retention time in the hydrolysis acidification-membrane separation coupling tank to be much longer than the hydraulic retention time to maintain a high concentration of activated sludge and enhance the hydrolysis acidification efficiency.

[0063] Step 5: The recovered carbon source is quantitatively added to the anoxic or anaerobic zone of the subsequent wastewater treatment unit, and the remaining sludge is discharged into the subsequent treatment unit. Specifically, the recovered carbon source is quantitatively added to the anoxic or anaerobic zone according to the nitrogen and phosphorus removal requirements of the subsequent treatment unit; the remaining sludge in the hydrolysis acidification-membrane separation coupling tank is periodically discharged to the subsequent treatment unit for further treatment.

[0064] The preset range in step one is: pH 5.5-6.5, ORP -100mV to -300mV; the concentration of volatile fatty acids in the recovered carbon source in step five is higher than 1500 mg / L.

[0065] Specific examples of its application in treating industrial wastewater: This wastewater was used to treat the combined wastewater of a dyeing and printing industrial park. The wastewater had a COD of 800-1500 mg / L, a BOD / COD ratio of approximately 0.25, and a C / N ratio of approximately 3:1. Wastewater first enters the intelligent homogenization and equalization tank. The pH meter, ORP meter, and COD online analyzer installed in the tank monitor the water quality in real time. When the pH is detected to be higher than 7.0, the controller controls the corrosion-resistant electric regulating valve to open and add dilute sulfuric acid to adjust the pH to about 6.0. The homogenization stirring mechanism runs continuously to ensure uniform mixing. The conditioned wastewater enters the hydrolysis-acidification-membrane separation coupling tank, which has an effective volume of 500 m³ and houses a polyvinylidene fluoride (PVDF) ultrafiltration membrane module with a pore size of 0.1 μm. The sludge suspension agitation mechanism operates at low speed to maintain sludge suspension. The hydraulic retention time (HRT) is set to 6 hours. The permeate suction pump operates intermittently in a mode of 8 minutes of suction followed by 2 minutes of rest, pumping the clear liquid (rich in VFAs) permeate through the membrane into the carbon source recovery storage chamber. Every hour of operation, the aeration and cleaning system is activated for a 1-minute large-volume scrubbing to prevent membrane fouling. A chemical enhanced cleaning is performed weekly.

[0066] After the system was put into operation, the mixed liquor sludge concentration (MLSS) in the hydrolysis acidification-membrane separation coupling tank was maintained at 12,000-15,000 mg / L, and the sludge retention time (SRT) was controlled at 20 days. Testing showed that the VFA concentration in the liquid recovered to the carbon source recovery storage chamber remained stable at 1,800-2,200 mg / L (calculated as COD).

[0067] The recovered liquid is precisely added to the anoxic tank of the subsequent A² / O process as a carbon source for denitrification, based on feedback from the nitrate concentration in the anoxic tank using a metering pump. Practice has shown that there is no need to purchase sodium acetate externally, saving approximately 500,000 yuan annually in carbon source costs. Simultaneously, the BOD / COD ratio of the wastewater entering the subsequent A² / O system is increased to above 0.45, the entire biological treatment system operates stably, and the final effluent consistently meets total nitrogen standards.

[0068] Specific beneficial effects: 1. Through real-time monitoring and feedback control of the intelligent homogenization equalization tank, the influent impact is effectively regulated, providing a stable environment for the hydrolysis acidification unit and significantly improving the impact resistance and operational stability of the entire pretreatment system.

[0069] 2. By coupling membrane separation technology with hydrolysis acidification process, the targeted enrichment and recovery of high-quality carbon sources (VFAs) are achieved. This can directly replace external carbon sources, providing an economical and efficient solution for treating industrial wastewater with low carbon-to-nitrogen ratios, and reducing carbon source addition costs by 20%-40%.

[0070] 3. The pretreatment process introduces a membrane bioreactor, which enables separate control of hydraulic retention time and sludge retention time. This allows the reactor to maintain an extremely high concentration of microorganisms, improving hydrolysis and acidification efficiency by more than 30% compared to traditional processes. The effluent has better biodegradability and significantly reduces the load on subsequent treatment units.

[0071] 4. By organically combining the needs of pretreatment with subsequent advanced treatment, the dual effects of water quality treatment and resource recovery are achieved, which improves the synergy and economy of the entire wastewater treatment system and meets the requirements of green and sustainable development.

[0072] It is worth noting that the controller 92 disclosed in the above embodiments is a PLC controller. The controller 92 controls the operation of the electric telescopic rod 17, the stirring motor 32, the online water quality monitor 91, the corrosion-resistant electric regulating valve 95, the aeration pump 41, the solenoid valve 43, the solenoid valve 710, the transfer water pump 62, the waterproof motor 68, the product water suction pump 712, the high-pressure air pump 813, and the closed control motor 86. The control method adopts the method commonly used in the prior art, wherein the closed control motor 86 is a servo motor.

[0073] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart conditioning tank system for carbon source recovery, comprising a smart homogenizing conditioning tank (1), the smart homogenizing conditioning tank (1) including a conditioning tank body (11), the bottom of the conditioning tank body (11) being connected to an arc-shaped tank bottom (12), and a bridge plate (16) being provided on the top of the conditioning tank body (11), characterized in that, The intelligent homogenizing and regulating tank (1) also includes a flow guiding ring sleeve (13). The bottom end of the flow guiding ring sleeve (13) is connected to the inner side of the middle part of the regulating tank body (11). The annular area between the flow guiding ring sleeve (13) and the top of the regulating tank body (11) is a static buffer chamber. An overflow height control component is installed on the top of the flow guiding ring sleeve (13). Also includes: The water distribution mechanism (2) of the regulating pool is installed in the middle of the arc-shaped pool bottom (12); The homogenizing and stirring mechanism (3) is installed in the middle of the regulating tank (11); The hydrolysis acidification-membrane separation coupling cell (5) is installed below the regulating tank (11); The intelligent dosing unit (9) is installed on the bridge plate (16).

2. The intelligent regulating tank system for carbon source recovery according to claim 1, characterized in that: The regulating pool water distribution mechanism (2) includes a hollow water distribution plate (22), and the middle part of the arc-shaped pool bottom (12) protrudes upward to form a water distribution and dispersion cover (21). The top of the water distribution cover (21) is fixedly connected to the hollow water distribution plate (22). Multiple water distribution holes (23) are arranged in a ring array on the bottom edge of the hollow water distribution plate (22). The bottom of the hollow water distribution plate (22) is connected to one end of the water supply pipe (24).

3. The intelligent regulating tank system for carbon source recovery according to claim 2, characterized in that: The homogenizing stirring mechanism (3) includes a hollow shaft (31). The hollow shaft (31) is located at the center of the regulating tank (11). The hollow shaft (31) is rotatably connected to the middle of the bridge plate (16). The top of the hollow shaft (31) is connected to the stirring power assembly. The bottom of the hollow shaft (31) is fixedly connected to the top center of the hollow turntable (37). The outer periphery of the hollow turntable (37) is rotatably connected to multiple horizontal stirring spokes (310) through multiple sealed bearings (39) distributed in a ring array. The spoke shaft (310) is fixedly connected to an internal gear (312) at one end inside the hollow turntable (37). The bottom end of the fixed shaft (35) is fixedly connected to the top center of the hollow water distribution plate (22). The top of the fixed shaft (35) is located at the bottom inside the hollow turntable (37) and is fixedly connected to the center of the end face gear (36). The end face gear (36) meshes with each internal gear (312). The end of the stirring spoke shaft (310) away from the internal gear (312) is fixedly connected to the middle of the stirring rod (311).

4. The intelligent regulating tank system for carbon source recovery according to claim 3, characterized in that: It also includes an aeration mechanism (4) for the regulating tank, which includes an arc-shaped rotating aeration pipe (45). The bottom edge of the hollow turntable (37) is connected to one end of a plurality of arc-shaped rotating aeration pipes (45) in a ring array. Aeration heads (46) are arranged at equal intervals on the upper side of the arc-shaped rotating aeration pipes (45). Fixed aeration components are arranged in a ring array on the upper side of the arc-shaped tank bottom (12). The top of the hollow shaft (31) and the top of the fixed aeration components are both connected to an air source supply component.

5. The intelligent regulating tank system for carbon source recovery according to claim 1, characterized in that: The hydrolysis acidification-membrane separation coupling tank (5) includes a hydrolysis acidification tank body (51). The hydrolysis acidification tank body (51) is located below the regulating tank body (11). An arc-shaped partition plate (52) is provided inside the hydrolysis acidification tank body (51). The space above the arc-shaped partition plate (52) inside the hydrolysis acidification tank body (51) is the hydrolysis acidification chamber. The space below the arc-shaped partition plate (52) inside the hydrolysis acidification tank body (51) is the carbon source recovery and storage chamber. A support ring (54) is provided at the bottom of the arc-shaped tank bottom (12). The support ring (54) is connected to the arc-shaped partition plate (52) through multiple supports (55) arranged in a ring array.

6. The intelligent regulating tank system for carbon source recovery according to claim 5, characterized in that: It also includes a sludge suspension agitation mechanism (6), which includes a sewage pumping assembly, a central fixed pipe (64), a rotary joint (65), a rotating drum (66), a waterproof power assembly, and a hollow water distribution inclined plate (69). The center of the arc-shaped partition plate (52) is fixedly connected to the central fixed pipe (64). The bottom end of the central fixed pipe (64) is connected to the bottom of the static buffer chamber through the sewage pumping assembly. The top of the central fixed pipe (64) is connected to the bottom end of the rotating drum (66) through the rotary joint (65). The top of the rotating drum (66) is connected to the waterproof power assembly. Four hollow water distribution inclined plates (69) are arranged in a ring array on the outer periphery of the rotating drum (66). The hollow water distribution inclined plates (69) are connected to the interior of the rotating drum (66).

7. The intelligent regulating tank system for carbon source recovery according to claim 5, characterized in that: It also includes a built-in membrane separation mechanism (7), which includes a membrane separation cylinder (74) and a hollow fiber ultrafiltration membrane (76). Multiple mounting base pipes (71) are arranged in a ring array along the upper edge of the arc-shaped partition plate (52). The bottom end of the mounting base pipe (71) passes through the side of the hydrolysis acidification tank (51) and is connected to the centralized pumping component. The top of the mounting base pipe (71) is threaded to the bottom end of the water collecting cone sleeve (72), and the top of the water collecting cone sleeve (72) is threaded to the bottom of the membrane separation cylinder (74). The outer periphery of the membrane separation cylinder (74) is provided with six separation cylinder slots (75) in an annular array. The bottom of the membrane separation cylinder (74) is provided with a base plate (73) and the top of the membrane separation cylinder (74) is provided with a top plate (77). A release groove (78) is provided on the top plate (77). Vertical hollow fiber ultrafiltration membranes (76) are evenly arranged between the base plate (73) and the top plate (77). The top of the hollow fiber ultrafiltration membrane (76) is closed. The opening at the bottom of the hollow fiber ultrafiltration membrane (76) is located at the top of the water collection cone sleeve (72).

8. The intelligent regulating tank system for carbon source recovery according to claim 7, characterized in that: It also includes an aeration and cleaning system (8), which includes an annular aeration and cleaning pipe (88), a cleaning aeration head (89) and a high-pressure air supply component. The annular aeration and cleaning pipe (88) is provided at the bottom of the membrane separation cylinder (74), and the cleaning aeration head (89) is arranged in an annular array at the top of the annular aeration and cleaning pipe (88). The high-pressure air supply component is connected to the side of the annular aeration and cleaning pipe (88).

9. The intelligent regulating tank system for carbon source recovery according to claim 8, characterized in that: The aeration and cleaning system (8) also includes a closed cylinder (81), a closed cylinder groove (82), and a separation cylinder groove closed power assembly. The membrane separation cylinder (74) is rotatably sleeved with the closed cylinder (81). The outer periphery of the closed cylinder (81) is provided with six closed cylinder grooves (82) in an annular array. The top of the closed cylinder (81) is connected to the separation cylinder groove closed power assembly.

10. The intelligent regulating tank system for carbon source recovery according to claim 1, characterized in that: The intelligent dosing unit (9) includes an online water quality monitor (91), a controller (92) and a dosing assembly. The controller (92) and the dosing assembly are respectively installed on the bridge plate (16). The inner wall of the flow guide ring sleeve (13) is connected to the online water quality monitor (91).

Images