MBR membrane treatment low carbon and intelligent water production device
By using an intelligent control system and online cleaning technology, the high cost and high energy consumption of MBR membrane bioreactors have been solved, achieving low-carbon and environmentally friendly high-efficiency wastewater treatment and stable water production, and reducing equipment operating costs and energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANFANG PUMP SMART WATER(HANGZHOU) TECH CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-06-23
AI Technical Summary
Existing MBR membrane bioreactors require precise manual control, resulting in high equipment costs and energy consumption. Furthermore, the complex backwashing system affects equipment operating efficiency.
The system employs a PLC controller combined with an aeration blower, product water pump, backwash water pump, and membrane washing mechanism to achieve intelligent control. It monitors the equipment in real time through oxygen content detectors and flow detectors, automatically adjusts the equipment operation, and combines online cleaning and membrane lifting functions to achieve efficient membrane cleaning and stable operation.
This achieves low-carbon and environmentally friendly operation of MBR membrane treatment, reduces energy consumption, improves purification efficiency, extends membrane lifespan, ensures stable water quality, reduces human intervention, and lowers operating costs.
Smart Images
Figure CN224394692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, specifically to a device for achieving low-carbon and intelligent water production through MBR membrane treatment. Background Technology
[0002] Water pollution is one of the most pressing problems facing humanity. Wastewater treatment involves multiple sub-processes, including physical, chemical, and biological methods. Essentially, it uses microbial biochemical reactions to oxidize and degrade organic carbon and nitrogen pollutants in wastewater, ensuring that the treated wastewater's quality indicators (such as total phosphorus, COD, SS, total nitrogen, ammonia nitrogen, and pH) meet wastewater discharge standards. Membrane bioreactors (MBRs) are a novel water treatment technology combining membrane separation and biological treatment units. However, existing MBRs are prone to membrane fouling, necessitating a backwashing system for regular backwashing. Conventional MBR systems require backwashing pipelines, which are relatively long and have large diameters to prevent interference with normal pipelines, resulting in higher equipment costs.
[0003] Chinese utility model patent CN215539881U discloses an MBR membrane backwashing system. By designing a single pump to simultaneously perform MBR membrane water treatment and backwashing, the system reduces equipment investment. Furthermore, by setting corresponding control valve structures on the pipeline, the MBR membrane backwashing system can switch between different working functions in different application scenarios. The backwashing pipeline is shared with part of the membrane treatment pipeline, saving equipment investment. The application also sets corresponding dosing and mixing systems on the backwashing pipeline, thereby improving the backwashing effect.
[0004] During the use of this device, the above processes rely on manual experience to adjust parameters, requiring precise human control. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] To address the shortcomings of existing technologies, this invention provides a low-carbon and intelligent water production device for MBR membrane treatment, which has the advantage of intelligent control and solves the problem that existing equipment requires constant and precise human control.
[0007] (II) Technical Solution
[0008] To achieve the above objectives, this utility model provides the following technical solution: a low-carbon and intelligent water production device for MBR membrane treatment, comprising a biochemical unit and an MBR membrane bioreactor. The biochemical unit is connected to an inlet pipe. An MBR membrane module is installed inside the MBR membrane bioreactor. A clear water tank is located on one side of the MBR membrane bioreactor. A membrane washing mechanism is installed between the MBR membrane bioreactor and the clear water tank. An aeration fan is installed on the biochemical unit and the MBR membrane bioreactor to introduce oxygen into them. A water production pump discharges water between the MBR membrane bioreactor and the clear water tank, discharging filtered water from the MBR membrane bioreactor into the clear water tank. A backwash pump is installed between the membrane washing mechanism and the MBR membrane bioreactor to discharge water from the clear water tank into the MBR membrane bioreactor for membrane flushing. An outlet pipe is fixedly connected to one side of the clear water tank. The water production device also includes a PLC controller.
[0009] Preferably, the biochemical unit includes an anaerobic tank, an anoxic tank, and an aerobic tank. Wastewater passes through the anaerobic tank, anoxic tank, and aerobic tank in sequence. A sludge return pump is fixedly installed inside the MBR membrane bioreactor. The sludge return pump repeatedly discharges the sludge from the MBR membrane bioreactor back into the anaerobic tank through a circulation pipe. A mixed liquor return pump is fixedly installed at the bottom of the aerobic tank. The mixed liquor return pump repeatedly discharges the mixed liquor from the aerobic tank into the anoxic tank through a return pipe. The mixed liquor return pump and the sludge return pump are electrically connected to the PLC controller.
[0010] Preferably, submersible mixers are fixedly installed at the bottom of the anaerobic tank and the anoxic tank respectively, for fully reacting the raw materials inside the anaerobic tank and the anoxic tank.
[0011] Preferably, the anoxic pool is equipped with an anoxic pool oxygen content detector, and the aerobic pool is equipped with an aerobic pool oxygen content detector. The anoxic pool oxygen content detector and the aerobic pool oxygen content detector respectively detect the oxygen content inside the anoxic pool and the aerobic pool.
[0012] Preferably, the air outlet of the aeration blower is connected to the bottom of the anoxic tank and the aerobic tank respectively through connecting pipes, and several jet nozzles are provided on the connecting pipes for supplying oxygen to the raw materials in the anoxic tank and the aerobic tank while stirring. The output shaft of the aeration blower is also connected to the MBR membrane bioreactor through connecting pipes, for filling the MBR membrane bioreactor with oxygen and flushing the blockages on the MBR membrane module. The oxygen content detectors in the anoxic tank and the aerobic tank are electrically connected to the PLC controller, and the output end of the aeration blower is connected to the connecting pipes through solenoid valves. Each connecting pipe is provided with a different sub-sole solenoid valve, and the solenoid valves and the sub-sole solenoid valves are electrically connected to the PLC controller.
[0013] Preferably, the MBR membrane bioreactor is equipped with an MBR tank water level detector, and the clear water tank is equipped with a clear water tank water level detector. The MBR tank water level detector and the clear water tank water level detector are electrically connected to the PLC controller.
[0014] Preferably, the water pump is equipped with a flow detector, which is electrically connected to the PLC controller.
[0015] Preferably, the membrane washing mechanism includes a feeding tank, one end of which is connected to the backwash water pump via a metering pump for adding cleaning agent to the inside of the MBR membrane bioreactor to clean the MBR membrane module. The metering pump is electrically connected to the PLC controller.
[0016] Preferably, the bottom of the anaerobic tank, anoxic tank, aerobic tank, and MBR membrane bioreactor is connected to a sludge discharge pipe.
[0017] Preferably, a lifting plate is fixedly connected to the bottom of the MBR membrane module for adjusting the rise or fall of the MBR membrane module.
[0018] (III) Beneficial Effects
[0019] Compared with the prior art, this utility model provides a low-carbon and intelligent water production device for MBR membrane treatment, which has the following beneficial effects:
[0020] 1. This device, a low-carbon and intelligent water production unit for MBR membrane treatment, utilizes a biochemical unit and an MBR membrane bioreactor architecture. The biochemical unit has an inlet pipe, and the MBR membrane bioreactor is equipped with MBR membrane modules. It employs an aeration fan for oxygen supply, a product water pump for drainage, and a backwash pump for circulating filtration. A PLC controller manages the system, achieving efficient wastewater treatment and intelligent management, resulting in low-carbon, environmentally friendly, and stable water production. The aeration fan provides sufficient oxygen for the biochemical reaction, ensuring microbial activity. The product water pump and backwash pump work together to achieve effective water discharge and circulating filtration, improving purification efficiency. The PLC controller monitors and adjusts the operation of each device in real time, precisely controlling the treatment process. This device not only removes pollutants from wastewater through multi-stage treatment, reducing environmental impact, but also reduces energy consumption through intelligent control, achieving low-carbon operation while ensuring stable and compliant product water quality, providing a reliable guarantee for subsequent water use.
[0021] 2. This low-carbon and intelligent water production device for MBR membrane treatment achieves precise control of dissolved oxygen concentration in the reaction tanks by installing submersible mixers and aeration blowers in the anaerobic, anoxic, and aerobic tanks respectively, combined with oxygen content detectors and PLC controllers. This achieves the dual effects of energy saving, consumption reduction, and improved treatment efficiency. The use of submersible mixers ensures thorough mixing of wastewater and microorganisms in the anaerobic and anoxic tanks, promoting anaerobic and denitrification reactions. The aeration blowers supply oxygen to the anoxic and aerobic tanks through connecting pipes and jet nozzles, while also acting as a mixer to ensure full contact between microorganisms and organic matter in the wastewater. Oxygen content detectors in the anoxic and aerobic tanks monitor the dissolved oxygen concentration in the tanks in real time and transmit the data to the PLC controller. The PLC controller precisely controls the oxygen supply of the aeration blowers through solenoid valves and sub-sole solenoid valves according to the preset dissolved oxygen concentration range, avoiding the oxygen waste problem in traditional aeration methods. This intelligent control system not only reduces energy consumption but also provides a suitable living environment for microorganisms, improves the degradation rate of organic matter and treatment effect, and achieves the goal of low-carbon operation.
[0022] 3. This low-carbon and intelligent water production device for MBR membrane treatment achieves online cleaning and efficient operation of the MBR membrane modules by setting up a membrane washing mechanism, backwash water pump, and lifting plate, thus extending membrane life and ensuring water quality. The feed tank of the membrane washing mechanism delivers cleaning agent to the backwash water pump through a metering pump. During the backwashing process, the cleaning agent enters the MBR membrane bioreactor along with the clean water to clean the MBR membrane modules, effectively removing contaminants and blockages from the membrane surface and restoring the membrane's permeability. The lifting plate allows the MBR membrane modules to rise or fall as needed, facilitating membrane installation, maintenance, and cleaning operations. Simultaneously, the PLC controller judges the degree of membrane clogging based on feedback from the flow detector on the water pump and automatically controls the operation of the membrane washing mechanism and backwash water pump, realizing intelligent and automated membrane cleaning. This online cleaning and maintenance mechanism reduces the frequency of membrane replacement, lowers operating costs, ensures the stable operation of the MBR membrane bioreactor and water quality, and enables the device to treat wastewater efficiently for a long time. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the structure of this utility model.
[0024] Figure 2 This is a schematic diagram of the structure of the MBR membrane bioreactor of this utility model.
[0025] Figure 3 This is a schematic diagram of the structure of this utility model.
[0026] Figure 4 This is a flowchart of the automatic adjustment system control of this utility model.
[0027] In the diagram: 100, Biochemical unit; 101, Inlet pipe; 110, Anaerobic tank; 111, Submersible mixer; 120, Anoxic tank; 130, Aerobic tank; 131, Mixed liquor return pump; 132, Return pipe; 133, Jet nozzle; 141, Anoxic tank oxygen content detector; 142, Aerobic tank oxygen content detector;
[0028] 200. MBR membrane bioreactor; 210. MBR membrane module; 220. Sludge return pump; 221. Circulation pipe; 230. Aeration blower; 231. Solenoid valve; 240. Permeate pump; 241. Flow detector; 251. MBR tank level detector; 252. Clear water tank level detector; 260. Lifting plate; 270. Backwash pump;
[0029] 300. Membrane washing mechanism; 310. Feeding tank; 320. Metering pump;
[0030] 400. Clear pool; 410. Outlet pipe;
[0031] 500. PLC controller; 510. Sludge discharge pipe. Detailed Implementation
[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0033] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0034] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.
[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0036] Example 1:
[0037] This embodiment provides a low-carbon and intelligent water production device for MBR membrane treatment, which has the following technical features.
[0038] Please see Figure 1-4A low-carbon and intelligent water production device for MBR membrane treatment includes a biochemical unit 100 and an MBR membrane bioreactor 200. An inlet pipe 101 is connected to the biochemical unit 100. An MBR membrane module 210 is installed inside the MBR membrane bioreactor 200. A clear water tank 400 is located on one side of the MBR membrane bioreactor 200. A membrane washing mechanism 300 is installed between the MBR membrane bioreactor 200 and the clear water tank 400. An aeration fan 230 is installed on the biochemical unit 100 and the MBR membrane bioreactor 200 to introduce oxygen into the biochemical unit 100 and the MBR membrane bioreactor 200. Water is discharged between the MBR membrane bioreactor 200 and the clear water tank 400 via a product water pump 240, which discharges the filtered water from the MBR membrane bioreactor 200 into the clear water tank 400. A backwash water pump 270 is installed between the membrane washing mechanism 300 and the MBR membrane bioreactor 200, which discharges water from the clear water tank 400 into the MBR membrane bioreactor 200 for membrane flushing. An outlet pipe 410 is fixedly connected to one side of the clear water tank 400. The product water device is also equipped with a PLC controller 500, which can control the amount of raw materials in different tanks and monitor the reaction status in real time.
[0039] It should be noted that the wastewater flows from the biological treatment unit to the MBR membrane bioreactor and from the MBR membrane bioreactor to the clear water tank in two separate steps. The MBR membrane bioreactor has a permeate pump (the permeate flow rate is about 30% higher than the influent (biological treatment unit) flow rate; the permeate pump operates for 8 minutes and stops for 2 minutes).
[0040] Furthermore, the biochemical unit 100 includes an anaerobic tank 110, an anoxic tank 120, and an aerobic tank 130. Wastewater passes through the anaerobic tank 110, the anoxic tank 120, and the aerobic tank 130 in sequence. A sludge return pump 220 is fixedly installed inside the MBR membrane bioreactor 200. The sludge return pump 220 repeatedly discharges the sludge inside the MBR membrane bioreactor 200 back into the anaerobic tank 110 through a circulation pipe 221. A mixed liquor return pump 131 is fixedly installed at the bottom inside the aerobic tank 130. The mixed liquor return pump 131 repeatedly discharges the mixed liquor inside the aerobic tank 130 into the anoxic tank 120 through a return pipe 132. The mixed liquor return pump 131 and the sludge return pump 220 are electrically connected to the PLC controller 500.
[0041] Furthermore, submersible mixers 111 are fixedly installed at the bottom of the anaerobic tank 110 and the anoxic tank 120 respectively, for fully reacting the raw materials inside the anaerobic tank 110 and the anoxic tank 120.
[0042] Furthermore, the anoxic tank 120 is equipped with an anoxic tank oxygen content detector 141, and the aerobic tank 130 is equipped with an aerobic tank oxygen content detector 142. The anoxic tank oxygen content detector 141 and the aerobic tank oxygen content detector 142 respectively detect the oxygen content inside the anoxic tank 120 and the aerobic tank 130.
[0043] It should be noted that the oxygen content detector 141 in the anoxic pool and the oxygen content detector 142 in the aerobic pool are electrically connected to the PLC controller 500.
[0044] Furthermore, the air outlet of the aeration blower 230 is connected to the bottom of the anoxic tank 120 and the aerobic tank 130 through connecting pipes, and several jet nozzles 133 are provided on the connecting pipes for supplying oxygen to the raw materials inside the anoxic tank 120 and the aerobic tank 130 while stirring. The output shaft of the aeration blower 230 is also connected to the MBR membrane bioreactor 200 through connecting pipes, for filling the MBR membrane bioreactor 200 with oxygen and flushing the blockages on the MBR membrane module 210. The oxygen content detector 141 of the anoxic tank and the oxygen content detector 142 of the aerobic tank are electrically connected to the PLC controller 500, and the output end of the aeration blower 230 is connected to the connecting pipe through the solenoid valve 231. Each connecting pipe is equipped with a different sub-sole solenoid valve, and the solenoid valve 231 and the sub-sole solenoid valve are electrically connected to the PLC controller 500.
[0045] Furthermore, the MBR membrane bioreactor 200 is equipped with an MBR tank water level detector 251, and the clear water tank 400 is equipped with a clear water tank water level detector 252. The MBR tank water level detector 251 and the clear water tank water level detector 252 are electrically connected to the PLC controller 500.
[0046] Furthermore, the water pump 240 is equipped with a flow detector 241, which is electrically connected to the PLC controller 500.
[0047] Furthermore, the membrane washing mechanism 300 includes a feeding tank 310, one end of which is connected to a backwash water pump 270 via a metering pump for adding cleaning agent to the interior of the MBR membrane bioreactor 200 to clean the MBR membrane module 210. The metering pump is electrically connected to a PLC controller 500.
[0048] It should be noted that the lifting plate 260 can be installed on the output shaft of the hydraulic cylinder inside the MBR membrane bioreactor 200, and the hydraulic cylinder can be electrically connected to the PLC controller to control the hydraulic cylinder to change the height of the lifting plate 260. Alternatively, both ends of the lifting plate 260 can be threaded onto a threaded rod, and an external motor can be fixedly connected to the top of the threaded rod to drive the lifting plate 260 to change its height. In addition, a vibration component can be installed on the lifting plate 260 to accelerate the cleaning of the MBR membrane module 210.
[0049] Working principle: Wastewater first enters the biochemical unit 100 through the inlet pipe 101, and then flows through the anaerobic tank 110, the anoxic tank 120 and the aerobic tank 130 for preliminary treatment. In the anaerobic tank 110, the submersible mixer 111 thoroughly mixes the wastewater with microorganisms, decomposing organic matter. In the anoxic tank 120, the mixed liquor return pump 131 repeatedly reintroduces the mixed liquor from the aerobic tank 130 for multiple denitrification processes. The submersible mixer 111 in the anoxic tank 120 ensures the raw materials react fully. Simultaneously, the aeration blower 230 supplies oxygen to the interior of the anoxic tank 120 via the jet nozzle 133. An oxygen content detector 141 is installed inside the anoxic tank 120, transmitting real-time oxygen content information to the PLC controller 500. The PLC controller 500 then controls the solenoid valve 231 on the connecting pipe, allowing the aeration blower 230 to intermittently supply oxygen to the interior of the anoxic tank 120, preventing high energy consumption. In the aerobic tank 130, the aeration blower 230 supplies oxygen via the jet nozzle 133, promoting... Organic matter decomposition and nitrification reactions occur simultaneously. Meanwhile, the oxygen content detector 142 in the aerobic tank 130 monitors the oxygen content in the aerobic tank 130 in real time and transmits this information to the PLC controller 500. The PLC controller 500 then controls the oxygen content in the aerobic tank 130 by controlling the solenoid valve 231 on the connecting pipe. Simultaneously, the large amount of oxygen ejected by the jet nozzle 133 agitates the raw materials in the aerobic tank 130. Subsequently, wastewater enters the MBR membrane bioreactor 200, where the MBR membrane module 210 filters the wastewater. The permeate pump 240 discharges the filtered clean water into the clear water tank 400. The aeration blower 230 supplies air to the MBR membrane bioreactor 200, providing oxygen for the microorganisms and flushing the MBR membrane module 210 to prevent clogging. Simultaneously, the sludge return pump 220 returns the sludge from the MBR membrane bioreactor 200 to the anaerobic tank 110, maintaining the microbial concentration in the biochemical unit 100.An MBR water level detector 251 is installed in the MBR membrane bioreactor 200 to detect the water level in the MBR membrane bioreactor 200. A clear water level detector 252 is installed in the clear water tank 400 to detect the water level in the clear water tank 400. The rates of the permeate pump 240 and the backwash pump 270 are controlled to be the same. Thus, when the difference in water level detected by the MBR water level detector 251 and the clear water tank level detector 252 changes, it can be determined that the MBR membrane module 210 is clogged. Simultaneously, a flow detector 241 is installed on the permeate pump 240 and electrically connected to the PLC controller 500. This allows for flow detection... When the meter 241 detects a decrease in the flow rate of the permeate pump 240, it indicates that the MBR membrane module 210 is clogged, necessitating cleaning. The metering pump 320 of the membrane washing mechanism 300 introduces cleaning agent into the backwash pump 270. Water from the clear water tank 400 is used to introduce the cleaning agent into the MBR membrane bioreactor 200 for backwashing the MBR membrane module 210. The MBR membrane module 210 is a hollow fiber membrane with a pore size of 0.1-0.4 micrometers. During permeate production, suspended solids (SS) and sludge are trapped outside the membrane. When the permeate pump 240 is operating, the inside of the MBR membrane module 210 is under negative pressure, thus producing clear water. During backwashing, the backwash pump 270 operates, and water from the clear water tank 400 is introduced into the MBR membrane bioreactor 200. Water and chemicals are introduced into the MBR membrane module 210 for backwashing, washing away suspended solids and sludge that adhere to the outer surface of the MBR membrane module 210 during permeate production; thus completing the permeate and backwashing process of the MBR membrane module 210. Simultaneously, in the MBR membrane bioreactor 200, the MBR membrane module 210 is fixed to a lifting plate 260. The height of the lifting plate 260 can be adjusted via a PLC controller 500. This allows the MBR membrane module 210 to be raised when it becomes clogged, reducing the contact height between the MBR membrane module 210 and the sludge at the bottom of the MBR membrane bioreactor 200, thereby increasing the efficiency of the MBR membrane module. After the entire reaction is complete, the sludge from the bottom of the biochemical unit 100 and the MBR membrane bioreactor 200 is discharged uniformly through the sludge discharge pipe 510. Throughout the process, the PLC controller 500, based on data from the oxygen content detectors 141 (anoxic tank), 130 (aerobic tank), 251 (MBR tank water level), 252 (clear water tank water level), and 241 (flow rate), adjusts the operation of equipment such as the aeration fan 230, product water pump 240, and backwash water pump 270 via solenoid valves 231 and sub-sole solenoid valves 231. This intelligent control ensures efficient and stable operation of the device, achieving low-carbon environmental protection and high-quality water production.
[0050] The working principle and process of the membrane washing mechanism 300 are as follows:
[0051] I. Normal operation backwashing:
[0052] 1. Backwash regularly (with a small amount of chemicals) once or twice a day (5-8 minutes each time).
[0053] 2. Automatic backwashing with differential pressure (small amount of chemicals): Transmembrane differential pressure ≥30kPa (data adjustable), one cleaning (5-8 minutes); Compared with timed cleaning, the advantages are: precise control of the frequency of chemical use (precise addition when backwashing conditions are met), reduced chemical use, increased lifespan of MBR membrane module 210, and stable effluent flow rate.
[0054] II. Chemical cleaning:
[0055] 1. Under normal conditions, the water production rate decreases by 10-20%, and it is difficult to restore the flux through simple backwashing.
[0056] 2. Constant flow operation, with pressure always maintained above 50-60 kPa.
[0057] 3. Constant flow operation, transmembrane pressure difference ≥50KPa.
[0058] 4. If none of the above situations occur, the MBR membrane module 210 must be chemically cleaned once every 3 months. Through the above measures, compared with conventional backwashing, combined with data analysis, the timing of backwashing can be accurately determined, saving chemicals, avoiding blind backwashing and chemical backwashing, reducing the frequency of chemical use, increasing the life of the MBR membrane module 210, and stabilizing the effluent flow rate.
[0059] III. Start-up of product water pump 240 and backwash water pump 270
[0060] Permeate pump 240 starts: based on the liquid level in MBR membrane bioreactor 200;
[0061] Backwash water pump 270 starts: based on the level of the clear water tank at 400;
[0062] IV. The mixed liquor in aerobic tank 130 is returned to anoxic tank 120.
[0063] 1. The standard reflux ratio is 200%-400%. The reflux ratio can be fine-tuned based on the total nitrogen content of the effluent and the dissolved oxygen level in the anoxic tank (120). If the total nitrogen is low and the dissolved oxygen is high, reduce the reflux ratio; if the total nitrogen is high and the dissolved oxygen is low, increase the reflux ratio.
[0064] V. 200 ml of the MBR membrane bioreactor is returned to 110 ml of the anaerobic tank.
[0065] 1. Timed sludge return (operation time adjustable);
[0066] 2. When the transmembrane pressure difference is greater than 30 kPa, start the sludge return pump 220 in stages (run for 15-30 minutes at a time with an interval of 1 hour, the data is adjustable).
[0067] Furthermore, the bottom of the anaerobic tank 110, the anoxic tank 120, the aerobic tank 130, and the MBR membrane bioreactor 200 are connected to a sludge discharge pipe 510.
[0068] Furthermore, a lifting plate 260 is fixedly connected to the bottom of the MBR membrane module 210 for adjusting the rise or fall of the MBR membrane module 210.
[0069] In summary, this low-carbon and intelligent water production device for MBR membrane treatment, through a water production device architecture consisting of a biochemical unit 100 and an MBR membrane bioreactor 200, includes an inlet pipe 101 in the biochemical unit 100 and an MBR membrane module 210 in the MBR membrane bioreactor 200. It utilizes an aeration blower 230 for oxygen supply, a product water pump 240 for drainage, and a backwash water pump 270 for circulation filtration. Simultaneously, a PLC controller 500 is configured for system control, achieving efficient wastewater treatment and intelligent management, thus achieving low-carbon, environmentally friendly, and stable water production. The device effectively produces wastewater; the aeration blower 230 provides sufficient oxygen for the biochemical reaction, ensuring the activity of microorganisms; the product water pump 240 works in conjunction with the backwash water pump 270 to achieve effective water discharge and circulating filtration, improving purification efficiency; the PLC controller 500 monitors and adjusts the operation of each device in real time, precisely controlling the treatment process; this device can not only remove pollutants from wastewater through multi-stage treatment, reducing the impact on the environment, but also reduce energy consumption through intelligent control, achieving low-carbon operation, while ensuring that the quality of the produced water is stable and meets standards, providing a reliable guarantee for subsequent water use.
[0070] In summary, this low-carbon and intelligent water production device for MBR membrane treatment achieves precise control of dissolved oxygen concentration in the reaction tanks by installing submersible mixers 111 and aeration blowers 230 in the anaerobic tank 110, anoxic tank 120, and aerobic tank 130 respectively, combined with an oxygen content detector and a PLC controller 500. This achieves the dual effects of energy saving, consumption reduction, and improved treatment efficiency. The use of submersible mixers 111 ensures thorough mixing of wastewater and microorganisms in the anaerobic tank 110 and anoxic tank 120, promoting anaerobic and denitrification reactions. Aeration blowers 230, through connecting pipes and jet nozzles 133, supply air to the anoxic tank 120 and aerobic tank 130. The system supplies oxygen and simultaneously acts as a stirrer, ensuring sufficient contact between microorganisms and organic matter in the wastewater. Oxygen content detectors 141 in the anoxic tank and 130 in the aerobic tank monitor the dissolved oxygen concentration in real time and transmit the data to the PLC controller 500. The PLC controller 500 precisely controls the oxygen supply of the aeration blower 230 according to a preset dissolved oxygen concentration range via solenoid valves 231 and sub-sole solenoid valves 231, avoiding the oxygen waste problem in traditional aeration methods. This intelligent control system not only reduces energy consumption but also provides a suitable living environment for microorganisms, improving the degradation rate and treatment effect of organic matter, thus achieving the goal of low-carbon operation.
[0071] In summary, this low-carbon and intelligent water production device for MBR membrane treatment achieves online cleaning and efficient operation of the MBR membrane module 210 by setting up a membrane washing mechanism 300, a backwash water pump 270, and a lifting plate 260. This extends the membrane's service life and ensures the quality of the produced water. The feed tank 310 of the membrane washing mechanism 300 delivers cleaning agent to the backwash water pump 270 through a metering pump 320. During the backwashing process, the cleaning agent enters the MBR membrane bioreactor 200 along with the clean water to clean the MBR membrane module 210, effectively removing pollutants and blockages from the membrane surface and restoring the membrane's permeability. The lifting plate 260 allows the MBR membrane module 210 to rise or fall as needed, facilitating membrane installation, maintenance, and cleaning. Simultaneously, the PLC controller 500, based on feedback from the flow detector 241 on the permeate pump 240, determines the degree of membrane clogging and automatically controls the operation of the membrane washing mechanism 300 and the backwash pump 270, achieving intelligent and automated membrane cleaning. This online cleaning and maintenance mechanism reduces the frequency of membrane replacement, lowers operating costs, ensures the stable operation of the MBR membrane bioreactor 200 and the quality of permeate water, enabling the device to treat wastewater efficiently and for a long period.
[0072] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0073] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for achieving low-carbon and intelligent water production in MBR membrane treatment, characterized in that, The system includes a biochemical unit (100) and an MBR membrane bioreactor (200). The biochemical unit (100) is connected to an inlet pipe (101). An MBR membrane module (210) is installed inside the MBR membrane bioreactor (200). A clear water tank (400) is located on one side of the MBR membrane bioreactor (200). A membrane washing mechanism (300) is located between the MBR membrane bioreactor (200) and the clear water tank (400). An aeration fan (230) is installed on both the biochemical unit (100) and the MBR membrane bioreactor (200) to aerate the biochemical unit (100) and the MBR membrane bioreactor (200). Oxygen is introduced into the MBR membrane bioreactor (200). Water is discharged between the MBR membrane bioreactor (200) and the clear water tank (400) through a product water pump (240) to discharge the filtered water inside the MBR membrane bioreactor (200) into the clear water tank (400). A backwash water pump (270) is provided between the membrane washing mechanism (300) and the MBR membrane bioreactor (200) to discharge the water inside the clear water tank (400) into the MBR membrane bioreactor (200) for membrane flushing. A water outlet pipe (410) is fixedly connected to one side of the clear water tank (400). The product water device is also equipped with a PLC controller (500).
2. The device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 1, characterized in that, The biochemical unit (100) includes an anaerobic tank (110), an anoxic tank (120), and an aerobic tank (130). Wastewater passes through the anaerobic tank (110), anoxic tank (120), and aerobic tank (130) sequentially. A sludge return pump (220) is fixedly installed inside the MBR membrane bioreactor (200). The sludge return pump (220) uses a circulation pipe (221) to return sludge from inside the MBR membrane bioreactor (200). The mixture is then re-discharged into the anaerobic tank (110). A mixed liquor return pump (131) is fixedly installed at the bottom of the aerobic tank (130). The mixed liquor return pump (131) discharges the mixed liquor inside the aerobic tank (130) into the anoxic tank (120) multiple times through the return pipe (132). The mixed liquor return pump (131) and the sludge return pump (220) are electrically connected to the PLC controller (500).
3. The device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 2, characterized in that, Submersible mixers (111) are fixedly installed at the bottom of the anaerobic tank (110) and the anoxic tank (120) respectively, for fully reacting the raw materials inside the anaerobic tank (110) and the anoxic tank (120).
4. The device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 2, characterized in that, The anoxic pool (120) is equipped with an anoxic pool oxygen content detector (141), and the aerobic pool (130) is equipped with an aerobic pool oxygen content detector (142). The anoxic pool oxygen content detector (141) and the aerobic pool oxygen content detector (142) respectively detect the oxygen content inside the anoxic pool (120) and the aerobic pool (130).
5. A device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 2, characterized in that, The air outlet of the aeration blower (230) is connected to the bottom of the anoxic tank (120) and the aerobic tank (130) via connecting pipes. Several jet nozzles (133) are installed on the connecting pipes to supply oxygen to the raw materials inside the anoxic tank (120) and the aerobic tank (130) while simultaneously stirring them. The output shaft of the aeration blower (230) is also connected to the MBR membrane bioreactor (200) via a connecting pipe to simultaneously introduce oxygen into the MBR membrane bioreactor (200). It can also flush out the blockages on the MBR membrane module (210). The oxygen content detector (141) in the anoxic tank and the oxygen content detector (142) in the aerobic tank are electrically connected to the PLC controller (500). The output end of the aeration blower (230) is connected to the connecting pipe through the solenoid valve (231). Each connecting pipe is equipped with a different sub-sole solenoid valve. The solenoid valve (231) and the sub-sole solenoid valve are electrically connected to the PLC controller (500).
6. The device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 1, characterized in that, The MBR membrane bioreactor (200) is equipped with an MBR tank water level detector (251), and the clear water tank (400) is equipped with a clear water tank water level detector (252). The MBR tank water level detector (251) and the clear water tank water level detector (252) are electrically connected to the PLC controller (500).
7. The device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 1, characterized in that, The water pump (240) is equipped with a flow detector (241), which is electrically connected to the PLC controller (500).
8. The device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 1, characterized in that, The membrane washing mechanism (300) includes a feeding tank (310), one end of which is connected to the backwash water pump (270) via a metering pump for adding cleaning agent to the inside of the MBR membrane bioreactor (200) to clean the MBR membrane module (210). The metering pump is electrically connected to the PLC controller (500).
9. A device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 2, characterized in that, The bottom of the anaerobic tank (110), anoxic tank (120), aerobic tank (130) and MBR membrane bioreactor (200) are connected to a sludge discharge pipe (510).
10. A device for realizing low-carbon and intelligent water production in MBR membrane treatment according to claim 1, characterized in that, The bottom of the MBR membrane module (210) is fixedly connected to a lifting plate (260) for adjusting the rise or fall of the MBR membrane module (210).