WO2022041732A1 - Composant de membrane respirante, réacteur à biofilm à membrane, et ensemble équipé de celui-ci - Google Patents

Composant de membrane respirante, réacteur à biofilm à membrane, et ensemble équipé de celui-ci Download PDF

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Publication number
WO2022041732A1
WO2022041732A1 PCT/CN2021/084902 CN2021084902W WO2022041732A1 WO 2022041732 A1 WO2022041732 A1 WO 2022041732A1 CN 2021084902 W CN2021084902 W CN 2021084902W WO 2022041732 A1 WO2022041732 A1 WO 2022041732A1
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Prior art keywords
membrane
biofilm reactor
hollow fiber
biofilm
central core
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PCT/CN2021/084902
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English (en)
Chinese (zh)
Inventor
石亚飞
袁蔚文
钱媛媛
李奎
刘可教
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麦王环境技术股份有限公司
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Priority claimed from CN202010890909.4A external-priority patent/CN111939764A/zh
Priority claimed from CN202021844971.1U external-priority patent/CN212440799U/zh
Application filed by 麦王环境技术股份有限公司 filed Critical 麦王环境技术股份有限公司
Publication of WO2022041732A1 publication Critical patent/WO2022041732A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present application relates to membrane biofilm reactors, in particular to an intelligent high-microorganism gas permeable membrane element, a membrane biofilm reactor and a membrane biofilm reactor assembly equipped with the same.
  • the mainstream treatment methods for sewage treatment include activated sludge method, biofilm method and membrane separation technology. Although their mechanism and application are quite mature, they still have shortcomings such as high energy consumption and poor treatment effect in specific fields.
  • the oxidation reaction is carried out by the biochemical method, due to the extremely low utilization rate of dissolved oxygen, the energy waste is too large; when the reduction reaction such as denitrification and denitrification is carried out, there is a problem of requiring an external carbon source; and for the increasingly strict sewage discharge standards, single Relying on the above methods can not achieve emission standards.
  • the membrane biofilm biofilm reactor combines the biofilm method with the breathable membrane technology.
  • the hollow fiber membrane module not only provides a habitat for the attachment and reproduction of microorganisms to form a biofilm, but also greatly increases the biofilm and biofilm due to its huge surface area. Effective contact area of pollutants in sewage, so as to achieve better removal of pollutants.
  • the membrane biofilm biofilm reactor can carry out oxidation reaction or reduction reaction due to the different reactants introduced (H2, O2, etc.), after the gas is introduced into the cavity of the hollow fiber, it diffuses through the hollow fiber membrane
  • the membrane wall is in contact with microorganisms outside the membrane, and the pollutants in the wastewater are oxidized or reduced to achieve the purpose of removing pollutants.
  • the utilization rate of the gas introduced is close to 100%, and the discharge of the remaining gas is small, thereby greatly reducing the operating cost.
  • membrane biofilm biofilm reactor units work well in laboratory and controlled test environments, but have problems with wastewater treatment.
  • high packing density can improve the treatment efficiency, that is, increase the removal rate of pollutants.
  • high packing densities can lead to biofouling, requiring maintenance (such as backwashing, disassembly, cleaning, etc.), which in turn reduces the operating efficiency and increases operating costs of the MBR.
  • the hollow fiber membrane module will inevitably have broken filaments and membrane filament winding. During the operation, due to the different subjective factors and professional quality of operators, the uncertainty of human operation is too large. Undoubtedly, it has resulted in an increase in operating costs.
  • the purpose of the present application is to provide a high microbial biomass membrane biofilm biofilm reactor, which improves the packing density of the hollow fiber membrane to provide a larger specific surface area for microorganisms to attach.
  • a gas permeable membrane element for a membrane biofilm reactor characterized in that it comprises: a central core tube and a plurality of woven membrane cloths,
  • At least one opening is configured on the side wall of the central core tube
  • the membrane cloth includes a plurality of hollow fiber membrane filaments and isolation filaments,
  • the outer side of the central core tube is spirally wound with two or more layers of the membrane cloth, and a radial braided layer is formed on the outer side of the central core tube.
  • the membrane cloth part covers the openings, and the central core Both ends of the tube are respectively provided with fixed end caps.
  • the gas permeable membrane element for a membrane biofilm reactor is further characterized in that it further comprises a separation net, and the separation net is used to separate the membrane cloth.
  • the hollow fiber membrane filaments are connected with one or more spacer filaments and woven to form a 90° angle.
  • the hollow fiber membrane filaments are arranged in groups and then connected to the spacer filaments respectively, and each group includes 2-200 hollow fiber membrane filaments.
  • the hollow fiber membrane is made of cellulose triacetate (CTA), polyethylene, polypropylene, polyurethane or polyvinyl chloride, and its outer diameter is 300 ⁇ m (there will be ⁇ 10% deviation in actual production), The inner diameter is 150 ⁇ m (there may be ⁇ 10% deviation in actual production).
  • CTA cellulose triacetate
  • polyethylene polyethylene
  • polypropylene polypropylene
  • polyurethane polyvinyl chloride
  • its outer diameter is 300 ⁇ m (there will be ⁇ 10% deviation in actual production)
  • the inner diameter is 150 ⁇ m (there may be ⁇ 10% deviation in actual production).
  • the spacer wire is made of cellulose triacetate, polyester, polypropylene, polyethylene or polyurethane and compounds thereof, and its outer diameter is between 100-500 ⁇ m, 150-450 ⁇ m or 200-400 ⁇ m.
  • the spacer wire comprises 150 polyester fibers with an outer diameter of about 300 ⁇ m and an inner diameter of about 150 ⁇ m.
  • the braiding interval of the hollow fiber membrane fibers is 1-3 mm.
  • the spacer between the isolation wires is 1-6 cm.
  • the embodiment of the present application provides a membrane biofilm reactor, which is characterized in that it includes a membrane box and at least one gas permeable membrane element for the membrane biofilm reactor, the gas permeable membrane element is fixed in the membrane box through a membrane frame .
  • the embodiments of the present application provide a membrane biofilm reactor assembly, which includes a membrane biofilm reactor and a control module,
  • the membrane biofilm reactor includes a membrane box and at least one of the above-mentioned breathable membrane elements for the membrane biofilm reactor.
  • the assembly includes a compressed air pipe, which is connected to the circulating water pipe, and a membrane pressure sensor, which is electrically connected to the control module.
  • the membrane pressure sensor is used to detect the membrane pressure of the breathable membrane element. When the detected membrane pressure difference exceeds the set value , enter the gas-water backwash stage based on the control of the control module to control the thickness of the biofilm.
  • the membrane pressure sensor is located on the connecting pipe between the circulating water port of the membrane box and the central core pipe, and is used to detect the membrane pressure of the breathable membrane element. wash stage to control the thickness of the biofilm.
  • the air and circulating water are fully mixed and flow into the central core tube to backwash the membrane cloth.
  • the air-water ratio is between 6-9:1
  • the air pressure is 6-8bar
  • the air-water backwashing time Each time is 120s to control the thickness of the biofilm between 100-200 ⁇ m.
  • the control module when the membrane biofilm reactor assembly is running, when the membrane pressure difference detected by the membrane pressure sensor exceeds the set value, the control module enters the gas-water backwash mode to control the biofilm thickness.
  • the set value of the membrane pressure difference is between 3 and 10 psi.
  • the air pipeline valve is opened and the inlet/outlet water is closed based on the control of the control module.
  • the valve stops the water in and out, and automatically enters the backwash mode.
  • the air and the circulating water are fully mixed and then flow into the central core tube to backwash the membrane cloth.
  • the ratio of air to water (air/water) Between 6-9:1, the air pressure is 6-8 bar, and the air-water backwash time is between 90-150s to maintain the biofilm thickness between 100-200 ⁇ m.
  • control module includes: a communication module, which is connected to a remote monitoring terminal, the control module exchanges information with the monitoring terminal, and the control module controls the monitoring terminal based on a preset operation mode during operation.
  • the membrane biofilm reactor assembly is running, and the operating parameter information is transmitted to the monitoring terminal or the monitoring terminal and the cloud server through the communication module in real time, and the membrane biofilm reactor assembly is monitored in real time based on the monitoring terminal.
  • control module includes: a human-machine interface, and the human-machine interface is configured with:
  • the first button triggering the first button, the membrane biofilm reactor assembly enters a first operation mode, and the membrane biofilm reactor assembly runs automatically based on preset parameters in the first operation mode,
  • the second button is triggered, the membrane biofilm reactor assembly enters a second operation mode, and the membrane biofilm reactor assembly stops running in the second operation mode.
  • the membrane biofilm reactor proposed in this application adopts a new special membrane element weaving method to solve the unavoidable occurrence of broken filaments and membrane filament winding in the actual use process of the hollow fiber membrane filaments. At the same time, it has a higher high packing density under a certain membrane biofilm reactor volume, thereby providing more attachment for microorganisms.
  • the reactor adopts the radial flow mode of the water to be treated in the reactor during operation, so that the attached microorganisms can make full use of the nutrients in the water to form a stable biofilm.
  • the membrane biofilm system is periodically backwashed, so as to control the biofilm at a reasonable thickness, effectively reduce the risk of membrane fouling and blockage, stabilize the effluent quality, and achieve precise energy consumption control.
  • FIG. 1 shows the braiding manner of the hollow fiber membrane filaments and the spacer filaments according to the embodiment of the present application.
  • FIG. 2 is an expanded view of the hollow fibers, spacer fibers and spacer meshes of the breathable membrane module according to the embodiment of the present application.
  • FIG 3 is a cross-sectional view of a membrane biofilm reactor according to an embodiment of the present application.
  • FIG. 3 a is a three-dimensional structural diagram of a membrane biofilm reactor according to an embodiment of the present application.
  • FIG. 4 is a process flow diagram of a membrane biofilm reactor according to an embodiment of the present application.
  • 1-pressing device 2-membrane box; 3-membrane box inlet pipe; 4-membrane air inlet system; 5-membrane outlet pipe; 6-membrane inlet H 2 system; 7-membrane element; 8-membrane module water inlet pipe ; 9- Membrane box circulating water outlet; 10- Membrane frame; 11- Membrane box water outlet; 12- Isolation net; 13- Membrane cloth; 14- Central core tube opening; 15- Central core tube; 16- Membrane shell end cap ; 17-external thread stainless steel joint; 18-membrane outlet; 19-hollow fiber membrane wire; 20-isolation wire.
  • the embodiments of the present application propose a gas permeable membrane element (also called a membrane element), a membrane biofilm reactor, and a (membrane biofilm reactor) assembly equipped with the same.
  • the membrane element is equipped with a central core tube and a plurality of membrane cloths, and at least one opening is arranged on the side wall of the central core tube;
  • the film cloth and part of the film cloth cover the openings to form a radial braided layer, and fixed end caps are respectively arranged at both ends of the central core tube.
  • the reactor includes a membrane box, and a plurality of gas-permeable membrane elements arranged in the membrane box, preferably, the membrane elements, are fixed in the membrane box through a membrane frame.
  • the breathable membrane element includes a central core tube, the side wall of the central core tube is provided with openings, and a membrane cloth.
  • the outer side of the central core tube is made of a plurality of woven membrane cloths spirally wound along the central core tube outside the tube to form a radial direction. Braided layer, the membrane cloth includes a plurality of hollow fiber membrane fibers and isolation fibers.
  • the gas such as hydrogen
  • the central core tube is tubular.
  • FIGS. 1 and 2 are schematic diagrams of a gas permeable membrane element for a membrane biofilm reactor according to an embodiment of the application.
  • the membrane element is equipped with a central core tube and a plurality of membrane cloths, and the membrane cloth is provided with hollow fiber membrane filaments and Isolated wire braided.
  • the hollow fiber membrane filaments 19 and the polyester fiber isolation filaments 20 are alternately woven at a mutually perpendicular angle.
  • the weaving interval of the hollow fiber membrane filaments 19 is 1-3 mm, and the weaving interval of the insulating filaments 20 is 1-6 cm. Bonding, and finally weaving to form a hollow fiber membrane cloth, and resin sealing is used between the hollow fiber membrane filaments of the formed membrane cloth.
  • the hollow fiber membrane filaments 19 may be arranged in groups and then connected to the spacer filaments 20 , and each group includes about 2-200 hollow fiber membrane filaments 19 .
  • the material of the hollow fiber membrane can be polypropylene.
  • the membrane element includes a central core tube 15, a plurality of (multiple) membrane cloths 13, a plurality of isolation nets 12, and two end caps 16.
  • the breathable membrane element is composed of multiple layers (eg, 8 layer)
  • the hollow fiber membrane cloth 13 is spirally wound along the central core tube 15 to form a radial braided layer outside the tube.
  • the central core tube 15 is configured to be hollow, and the tube wall is arranged
  • the perforation area is provided with one or more openings 14.
  • each hollow fiber filament 19 includes an inner cavity, an outer wall and two open ends, and the two ends of the hollow fiber filament in the middle of the box are respectively enclosed in two end caps 16/16a of the membrane shell.
  • One end of the end cap 16a is equipped with the H 2 system 6 and the membrane module water inlet pipe 8, and the other end cap 16 is equipped with the remaining H 2 gas outlet 18 and the external thread stainless steel joint 17 for fixing.
  • the effective contact area between the biofilm and the pollutants in the sewage can be increased to enhance the metabolism;
  • the membrane biofilm reactor has a high packing density under a certain volume, so as to provide Microorganisms provide more attachment points;
  • the special weaving method of membrane elements solves the unavoidable occurrence of broken filaments and membrane filament winding in actual use;
  • the radial flow mode enables attached microorganisms to make full use of nutrients in water to form stable organisms membrane.
  • the hollow fiber membrane filaments forming the membrane cloth are sealed with resin.
  • Isolation mesh refers to a porous, continuous flat sheet material consisting of a flat grid of recyclable plastic used to separate and maintain hollow fiber spaces.
  • the membrane cloth is woven from a plurality of hollow fiber membrane filaments connected with one or more spacer filaments and forming a 90° angle.
  • the hollow fiber membrane filaments can be arranged into groups and then connected with the spacer filaments, and each group includes about 2-200 hollow fiber membrane filaments.
  • the hollow fiber is made of cellulose triacetate (CTA), polyethylene, polypropylene, polyurethane or polyvinyl chloride, with an outer diameter of about 300 ⁇ m and an inner diameter of about 150 ⁇ m.
  • the spacer wire has a certain elasticity and can be shrunk and stretched; its material is selected from cellulose triacetate, polyester, polypropylene, polyethylene or polyurethane and compounds thereof.
  • the outer diameter of the spacer wire should be between 100 to 500 ⁇ m or 150 to 450 ⁇ m or 200 to 400 ⁇ m.
  • the spacer wire is a 150 polyester fiber with an outer diameter of about 300 ⁇ m and an inner diameter of about 150 ⁇ m.
  • the weaving interval of the hollow fiber membrane fibers is 1-3 mm.
  • the weaving interval of the spacer wire is 1-6cm, and its supporting force is the key factor for fixing the hollow fiber, which minimizes the turning and deflection of the hollow fiber in actual operation, and can shrink and stretch at the same time. to reduce the occurrence of wire breakage.
  • the embodiments of the present application propose a membrane biofilm reactor, which includes at least two gas permeable membrane elements (also referred to as membrane elements).
  • the membrane element is arranged in the membrane box through the membrane frame, and the sewage is introduced into the central core tube during application, and the gas is introduced into the inner cavity of the hollow fiber membrane for the growth of microorganisms on the outer surface of the hollow fiber membrane.
  • the sewage flows out from the open area of the central core tube and contacts the microorganisms on the outer surface of the hollow fiber membrane, thereby forming a radial flow.
  • the radial flow pattern enables the attached microorganisms to fully utilize the nutrients in the water to form a stable biofilm.
  • the membrane box is provided with 4 sets of air-permeable membrane elements, and the 4 sets of air-permeable membrane elements are juxtaposed and vertically fixed on the membrane frame (for example, two sets of juxtaposed sets are vertically fixed to the membrane frame.
  • the membrane frame is arranged in the box (also called the membrane tank), which provides more attachment points for microorganisms. In practical applications, an appropriate number of membrane elements can be selected according to the water quality requirements.
  • the sewage to be treated enters the membrane tank from the influent storage tank through the influent centrifugal pump, and then the membrane biofilm reactor in it flows into the central core tube at one end, and the gas enters from the membrane shell end cover at the same end.
  • the gas port enters the inner cavity of the hollow fiber membrane, and the excess gas is discharged from the gas outlet on the end cap of the other end of the membrane shell.
  • the sewage is introduced into the central core tube, and the gas is introduced into the inner cavity of the hollow fiber for the growth of microorganisms on the outer surface of the hollow fiber.
  • the sewage flows out from the opening area of the central core tube and contacts the microorganisms on the outer surface of the hollow fiber, thereby forming a radial flow.
  • the radial flow pattern enables the attached microorganisms to fully utilize the nutrients in the water to form a stable biofilm.
  • the final treated water is discharged through the drainage port at the bottom of the membrane box.
  • the gases passing through the cavity of the hollow fiber are hydrogen and carbon dioxide, and can also be air/oxygen depending on the treatment target.
  • flammable H2 is used as the reducing gas, the gas utilization rate is close to 100%, and the remaining gas emission is small.
  • H2 or O2 or air can be introduced into the system for reaction according to different influent water quality and treatment requirements.
  • the embodiment of the present application proposes a membrane biofilm reactor assembly, the membrane biofilm reactor assembly includes the membrane biofilm reactor proposed in the application, a backwashing assembly and a control module,
  • the backwash component includes an air compressor system, which is electrically connected to the control membrane, based on the command action of the control module, the output of the air compressor system is connected with a compressed air pipe, and the compressed air pipe is connected to the circulating water pipe;
  • the membrane pressure sensor is electrically connected to the control module.
  • the membrane pressure sensor is located on the connecting pipe between the circulating water outlet of the membrane box and the central core tube, and is used to detect the membrane pressure of the breathable membrane element. When the detected membrane pressure difference exceeds the set value , based on the control of the control module, it enters the gas/water backwash stage to control the thickness of the biofilm.
  • the membrane biofilm reactor assembly will be described with reference to FIG. 2, FIG. 3 and FIG. 3a.
  • the membrane element 7 is placed vertically in the membrane box 2.
  • the membrane element 7 is fixed on the membrane frame 10 through the bottom external thread stainless steel joint 17, and then passes through the membrane frame 10. Compression device compression 1.
  • the sewage to be treated flows into the membrane box from the water inlet pipe 3 of the membrane box, the sewage flows into the central core tube from one end of the membrane biofilm reactor, and the gas enters H2 (hydrogen) from the membrane on the end cover of the membrane shell at the same end.
  • the air inlet 6 of the system enters the inner cavity of the hollow fiber membrane (not shown), and the remaining gas is discharged from the air outlet 18 on the end cap of the other end of the membrane shell.
  • the gas passing through the cavity of the hollow fiber is hydrogen and carbon dioxide, but may also be air/oxygen depending on the treatment target.
  • the treated water flows out through the water outlet 11 of the membrane box.
  • part of the treated water flowing out through the water outlet 11 of the membrane box flows back into the membrane box through the circulating water outlet 9 of the membrane box.
  • the process flow of the membrane biofilm reactor assembly is shown in Figure 4 (a group of two membrane elements (membrane elements are also called membrane modules at this time), which are vertically fixed on the membrane frame in parallel, and the membrane frame is fixed on the membrane frame.
  • the membrane pressure sensor is arranged on the outlet pipe of the membrane tank circulating pump (not shown).
  • the membrane frame is arranged in the box (also known as the membrane tank, and each membrane tank is equipped with a membrane pressure sensor), which provides more attachment points for microorganisms.
  • the treated water is output (outlet water) through the water outlet storage tank through the external centrifugal pump.
  • the membrane biofilm system can be backwashed (air compressor operation, using gas and water for backwashing) or the membrane biofilm system can be periodically backwashed based on the automatic control program (air compressor operation, Use gas water for backwashing) to control the reasonable thickness of the biofilm.
  • control module is electrically connected to the human-machine interface, so that when the membrane biofilm biofilm reactor assembly is running, interface operations such as "one-key automatic” button and “one-key emergency stop” are performed through the human-machine interface. ” button for automatic control.
  • the target sewage to be treated is connected to the water inlet pipe 3 of the membrane box through the pipeline, so that the sewage flows into the membrane box 2, and then 40-50% of the sewage is pumped out and pumped into the water inlet pipe 8 of the membrane module and the outside of the hollow fiber membrane through the circulating water port 9 of the membrane box.
  • the surface biofilm is in contact, and at the same time, H2 is introduced into the hollow fiber membrane through the H2 inlet system 6 for reaction, and the remaining H2 is discharged through the air outlet pipe 5 of the membrane element, and the treated water is discharged through the water outlet 11 of the membrane box.
  • the membrane pressure difference exceeds the set value of 3-10psi, the membrane element needs to be backwashed.
  • the air compressor system is turned on based on the control of the control module, and the air compressor works to make the air pass through the membrane air inlet system 4 and the circulating water.
  • the central core tube 15 Entering the central core tube 15 to form a high-pressure air/water backwash flow (the compressed air and circulating water are fully mixed and then enter the central core tube to backwash the membrane, and the circulating water port of the device is also the inlet of the flushing gas) into the central core tube 15
  • the air/water inside flows out through the opening 14 of the central core tube, while the air/water flows out, scrubbing the biofilm on the membrane surface at a high speed to remove aged microorganisms to reduce the thickness of the biofilm.
  • the circulating water accounts for 40% to 50% of the discharged water.
  • a CO2 gas pipe is connected to the water pipe of the circulating water. When the pH of the system fluctuates, CO2 needs to be introduced at the same time for adjustment.
  • the air/water ratio of the air/water backwash is 6-9:1 (eg 9:1), and the air pressure is 6-8 bar.
  • the set value of the membrane pressure difference is between 3 and 10 psi. When the membrane pressure difference exceeds the set value, the system will open the air pipeline valve through the control program, stop the inlet and outlet water and automatically enter the backwash stage.
  • the washing (air/water backwashing) time was 120 s each time to maintain the biofilm thickness between 100 and 200 ⁇ m.
  • the control module includes a PLC control system (the PLC control system is connected to various online instruments, water inlet/outlet valves, regulating valves, frequency converters, etc.) Good operation parameters and logical relationship, realize the automatic operation control of the membrane biofilm biofilm reactor system), which is connected to the video online monitoring system and the intelligent Internet of Things communication system, so that the membrane biofilm reactor module can realize the membrane biofilm reactor when it is running.
  • the automation-informatization-intelligent operation control of the operation of membrane reactor components can realize intelligent and precise control, making the system operation more low-consumption and efficient.
  • the video surveillance system based on standard network, mobile broadband and other protocols can be directly connected through LAN, DSL connection or wireless network adapter to realize real-time monitoring of the operating conditions and surrounding working environment of the entire system, and can store data in the cloud. Retrieval, backup, playback, viewing and other operations can be realized 7*24 hours online monitoring of the entire system operating conditions through the PC terminal and mobile APP.
  • the system when the membrane pressure difference still exceeds the set value after the gas-water backwashing, the system alarms and prompts that the membrane module needs to be disassembled for off-line cleaning.
  • the thickness of the biofilm can be reasonably controlled to prevent membrane fouling.
  • part of the effluent water is circulated back to the assembly during backwashing, and the circulating water accounts for 40% to 50% of the effluent water.
  • the circulating water pipe is connected to the CO2 gas pipe, and the CO2 gas pipe is connected to the CO2 gas pipe for pH adjustment when the pH of the system fluctuates.
  • the membrane biofilm biofilm reactor adopts a special structure so that the attached microorganisms can make full use of the nutrients in the water to form a stable biofilm, and the growth of the biofilm in long-term operation will inevitably lead to a decrease in membrane flux. Therefore, the control module periodically backwashes the membrane biofilm system based on the preset automatic control program, so as to control the biofilm at a reasonable thickness, effectively reduce the risk of membrane fouling and blockage, stabilize the effluent quality, and achieve precise energy consumption control.
  • An embodiment of the present application provides a membrane biofilm biofilm reactor assembly with a high microbial biomass.
  • the assembly operates according to a preset mode based on a configured control module, and can also monitor membrane organisms based on the detection results of a membrane pressure sensor configured in the box.
  • the membrane system is backwashed to control the reasonable thickness of the biofilm, effectively reducing the risk of membrane fouling and blockage, and also achieving precise energy consumption control.
  • the reducing gas hydrogen is used as the electron donor for denitrification to treat the total nitrogen in the sewage.
  • oxidizing air is used to aerate and oxidize organic matter in municipal sewage, so as to achieve the purpose of removing organic pollutants.
  • Influent water quality pH: 7 ⁇ 9, the average is 8; COD: 300 ⁇ 600mg/L, the average is 500mg/L; Ammonia nitrogen: 20 ⁇ 30mg/L; The temperature is between 25 ⁇ 35°C, the average is 28 °C.
  • the influent water volume Q 100m 3 /h, the effluent water quality after treatment is: pH: 7 ⁇ 8.0; COD: 30 ⁇ 50mg/L, the average value is 40mg/L; Ammonia nitrogen: ⁇ 5mg/L; the whole system runs stably, The effluent meets the relevant standard requirements.
  • An embodiment of the present application provides a membrane biofilm reactor assembly with a high microbial biomass. Based on the automatic control program of the control module, the membrane biofilm system can be periodically backwashed, so as to control the reasonable thickness of the biofilm and effectively reduce the membrane biofilm thickness. The risk of pollution blockage can also achieve precise energy consumption control purposes.
  • An embodiment of the present application provides an intelligent high microbial biomass membrane biofilm reactor assembly (referred to as a membrane biofilm reactor assembly), the membrane biofilm reactor assembly includes a control module and a communication module, and the operation process is based on the control module.
  • the control module includes a PLC control program
  • the parameter information of the control operation is connected to the remote monitoring terminal through a communication module (such as an IOT module, LAN, DSL or wireless network adapter) in real time, so that the membrane biofilm reactor assembly
  • the parameter information during runtime is transmitted to the monitoring terminal in real time, realizing real-time monitoring of the operating conditions of the entire component system and the surrounding working environment, and can store data in the cloud to support retrieval, backup, playback and other operations.
  • the monitoring terminal is equipped with a display module, so as to realize the real-time display of the operation information of the entire membrane biofilm reactor assembly, and realize the automation and information visualization of the operation of the membrane biofilm reactor assembly.
  • An embodiment of the present application provides a membrane biofilm reactor assembly, which is configured with a man-machine interface, and the man-machine interface is configured with: a first button, triggering the first button, the membrane biofilm reactor assembly enters the first operation mode, the first In the running mode, the membrane biofilm reactor assembly runs automatically based on the preset parameters (that is, one-button automatic operation), the second button, triggers the second button, the membrane biofilm reactor assembly enters the second operation mode, the second operation mode
  • the lower membrane biofilm reactor assembly stops running (ie, one-key emergency stop).
  • the remote monitoring terminal is also equipped with the same first button and second button, so that the components can be remotely controlled after being powered on.
  • orientation or positional relationship indicated by the terms “upper”, “lower”, “inner”, “middle”, etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe the present application and its embodiments, and are not intended to limit the fact that the indicated device, element, or component must have a particular orientation, or be constructed and operated in a particular orientation.

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Abstract

L'invention concerne un composant de membrane respirante (7), un réacteur à biofilm à membrane et un ensemble réacteur à biofilm à membrane pourvu de celui-ci. Le réacteur à biofilm à membrane comporte de multiples composants de membrane (7) fixés sur un cadre de membrane (10) et placés dans un logement de membrane (2). En tant que composants de noyau, les composants de membrane respirante (7) comprennent de multiples tissus membranaires tissés (13) enroulés en spirale sur un tuyau de noyau central (15) pour constituer une couche tissée radiale sur le tuyau, les tissus membranaires (13) étant formés par tissage d'une grande quantité de filaments de membrane à fibres creuses (19) et de filaments barrières (20). Les eaux usées sont introduites dans le tuyau de noyau central (15), un gaz est introduit dans les cavités d'une membrane à fibres creuses pour la croissance de micro-organismes sur la surface extérieure de la membrane à fibres creuses, et les eaux usées s'écoulent à partir d'une zone perforée du tuyau de noyau central pour entrer en contact avec les micro-organismes sur la surface extérieure de la membrane à fibres creuses, formant ainsi un écoulement radial.
PCT/CN2021/084902 2020-08-29 2021-04-01 Composant de membrane respirante, réacteur à biofilm à membrane, et ensemble équipé de celui-ci WO2022041732A1 (fr)

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