CN115465945A - Filter medium series type membrane bioreactor and flushing method thereof - Google Patents

Filter medium series type membrane bioreactor and flushing method thereof Download PDF

Info

Publication number
CN115465945A
CN115465945A CN202211152230.0A CN202211152230A CN115465945A CN 115465945 A CN115465945 A CN 115465945A CN 202211152230 A CN202211152230 A CN 202211152230A CN 115465945 A CN115465945 A CN 115465945A
Authority
CN
China
Prior art keywords
filter
flushing
pipe
water
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211152230.0A
Other languages
Chinese (zh)
Inventor
刘强
姚颖
刘泽山
刘思瑶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou University of Technology
Original Assignee
Xuzhou University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xuzhou University of Technology filed Critical Xuzhou University of Technology
Priority to CN202211152230.0A priority Critical patent/CN115465945A/en
Publication of CN115465945A publication Critical patent/CN115465945A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/16—Regeneration of sorbents, filters
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Activated Sludge Processes (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a membrane bioreactor with tandem type filter media and a washing method thereof, wherein the membrane bioreactor consists of an aeration tank and an upward flow ultra-light filter material filter tank, wherein a raw water pipe, an aeration pipe and a filter cloth component are connected into the aeration tank, a filtered water outlet of the filter cloth component is butted with a water inlet end of a connecting pipe, a water outlet end of the connecting pipe is connected into the filter tank, and a second water flushing pipe and a second air flushing pipe are butted on the connecting pipe; the cross section of the filter tank is provided with a filter plate, a filter layer made of ultra-light filter materials is arranged below the filter plate, the bottom of the filter tank is butted with a flushing wastewater discharge pipe, a first air flushing pipe is introduced into the bottom of the filter tank, and a first water flushing pipe is butted on the clean water pipe. The membrane bioreactor can complete the cleaning of the filter cloth component and the ultralight filter material through the matching of valves on pipelines. The invention not only effectively maintains the advantages of the traditional MBR, but also has the advantages of controllable filtration rate, effluent turbidity and SS concentration, and has the advantages of very low operation cost, simple flushing mode, good effect and very simple and convenient management and maintenance.

Description

Filter medium series type membrane bioreactor and flushing method thereof
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a filter medium series type membrane bioreactor and a flushing method thereof.
Background
The Membrane Bioreactor (MBR) has the advantages of good effluent quality, small floor area, low sludge yield and the like, but the conventional MBR generally has the problem of membrane pollution. Generally, membrane fouling mainly refers to a phenomenon that colloidal particles, sludge flocs, organic/inorganic solutes and other macromolecules in feed liquid and a membrane have complex mechanical or physicochemical actions in the operation process of wastewater treatment of MBR, so that the macromolecules are adsorbed and deposited on the surface or in membrane pores of the membrane, and finally the membrane flux is reduced. Analysis of the causes of membrane fouling is believed to be mainly caused by several fouling mechanisms acting individually or in combination on the membrane filtration process of MBR, which play a dominant role at different stages of the filtration process: adsorption of colloid and solvent substances generated on the surface of the membrane and in the pores of the membrane, deposition of sludge flocs on the surface of the membrane, formation of a filter cake layer on the surface of the membrane, pollutant dissociation mainly caused by the action of shearing force, change of pollutant components in space and time, and the like. According to different influence factors causing membrane pollution, different membrane pollution control measures can be adopted, and the measures mainly comprise water inlet pretreatment, sludge mixed liquor property change, operation condition optimization, membrane modification, back flushing, membrane cleaning and the like. These measures can slow down membrane fouling to some extent, but also make the operating procedure extremely complicated and costly to run.
Taking the example of treating the leachate of the refuse transfer station, because the concentration of the organic matters in the leachate of the refuse transfer station is very high and the internal space of the refuse transfer station is limited, a submerged MBR with a small occupied area is generally adopted at the end of the sewage treatment process, most of membrane components are microfiltration membranes (the membrane aperture is about 0.10-0.45 um), the price of the membrane materials is high, the service life of the membrane materials is short (generally not more than 1 year), and scale is easily formed on the surfaces of the microfiltration membranes in the operation process (the main component is CaCO) 3 ) The management and maintenance difficulty of the equipment is high, and the operation cost is high. In order to greatly reduce the operation cost, reduce the operation management difficulty and ensure the long-term stable operation of the leachate treatment equipment of the garbage transfer station, the conventional MBR process is urgently required to be improved.
Disclosure of Invention
The invention aims to provide a filter medium series type membrane bioreactor and a flushing method thereof to replace the traditional MBR, and aims to solve the problems of poor membrane pollution control measure effect, complex operation, high operation cost and the like in the traditional MBR.
The invention is realized in such a way that the membrane bioreactor comprises an aeration tank and an upward flow ultra-light filter material filter tank, wherein the top of the aeration tank is filled with water through a raw water pipe, the bottom of the aeration tank is filled with air through an air supply pipe, the air outlet end of the air supply pipe is connected with an aeration head, the water in the aeration tank is filled into the bottom of the filter tank through a connecting pipe, the top of the filter tank is connected with a clear water pipe,
a filter cloth component is arranged in the aeration tank, a filtered water outlet of the filter cloth component is in butt joint with a water inlet end of the connecting pipe, and the connecting pipe is in butt joint with a second water flushing pipe and a second air flushing pipe; a filter plate is arranged on the cross section in the filter tank, a filter layer made of ultra-light filter materials is arranged below the filter plate, the bottom of the filter tank is butted with a flushing wastewater discharge pipe, a first air flushing pipe is introduced into the bottom of the filter tank, and a first water flushing pipe is butted with the clean water pipe;
each pipeline is provided with a valve which can control the independent on-off of the pipeline.
Preferably, the filter cloth assembly comprises a bracket positioned in the aeration tank, a frame is fixed on the bracket, and reinforcing ribs are arranged on the frame; the frame, arrangement of reinforcement constitute the splint structure, set up bag form filter cloth package in this splint structure, be equipped with the delivery port on the filter cloth package, this delivery port butt joint the connecting pipe.
Preferably, the air permeability of the filter cloth bag is 20-120L/m 2 ·s。
Preferably, the connecting pipe and the first air flushing pipe are uniformly distributed with perforations on the pipe body in the filter tank.
Preferably, a vacuum meter and a sewage pump are arranged on the connecting pipe.
Preferably, the filter cloth assembly is arranged right above the aeration head.
The invention further discloses a flushing method of the membrane bioreactor, wherein the flushing comprises the flushing of a filter cloth component and the flushing of a filter layer; wherein, the first and the second end of the pipe are connected with each other,
the filter cloth component washing process comprises the following steps:
(11) Filling water into the filter cloth assembly through a second water flushing pipe, and flushing the filter cloth from inside to outside; without stopping water flushing, quickly introducing air into the filter cloth assembly through the second air flushing pipe to enable the water pressure in the filter cloth assembly to be increased suddenly, and enabling high-speed water flow to flush the filter cloth from inside to outside;
(12) Stopping air blasting, performing air blasting after the filter cloth assembly is filled with water, and repeating the step (11) for 2-3 times;
the filter layer flushing comprises the following steps:
(21) Air is introduced through the first air flushing pipe to perform air flushing on the filter, and air bubbles pass through the filter layer from bottom to top;
(22) Stopping the air blast, and discharging the waste water in the filter tank through a washing waste water discharge pipe or discharging a proper amount of waste water so that the ultra-light filter material falls and becomes loose under the action of losing buoyancy;
(23) Stopping the discharging, and injecting clear water from the top of the filter tank through a first water flushing pipe to flush the filter layer;
(4) And stopping the flushing, and discharging flushing water in the filter tank through a flushing wastewater discharge pipe.
The present invention has the following advantageous effects by comparing the disadvantages and shortcomings of the prior art:
(1) The invention not only effectively retains the advantages of the traditional MBR, such as separated hydraulic retention time and sludge retention time, higher MLSS, good effluent quality, small floor area, less residual sludge and the like, but also has the advantages of controllable filtration rate, effluent turbidity and SS concentration, the effluent turbidity can be controlled below 20NTU, and the SS is less than 150mg/L;
(2) Compared with the traditional MBR, the membrane bioreactor has very low operation cost, effectively solves the problems of rapid increase of filtration resistance caused by membrane pollution and incrustation scale on the membrane surface caused by hardness, and is very simple and convenient to manage and maintain;
(3) Compared with the traditional MBR, the membrane bioreactor has the advantages of simple flushing mode, good flushing effect and simple operation.
Drawings
FIG. 1 is a schematic diagram of the membrane bioreactor of the present invention;
FIG. 2 is a schematic structural diagram of a filter cloth assembly in the membrane bioreactor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in FIGS. 1-2, wherein FIG. 1 is a schematic structural view of a membrane bioreactor of the present invention; FIG. 2 is a schematic diagram of the structure of a filter cloth module in the membrane bioreactor of the present invention.
The embodiment of the invention discloses a filter medium tandem type membrane bioreactor, which comprises an aeration tank 2 and an upward flow ultra-light filter material filter tank 8, wherein the top of the aeration tank 2 is filled with water through a raw water pipe 1, the bottom of the aeration tank is filled with air through an air supply pipe 3, the air outlet end of the air supply pipe 3 is butted with an aeration head 4, the water in the aeration tank 2 is filled into the bottom of the filter tank 8 through a connecting pipe, the top of the filter tank 8 is butted with a clear water pipe 11, a filter cloth component 5 is arranged in the aeration tank 2, the filtered water outlet of the filter cloth component 5 is butted with the water inlet end of the connecting pipe, and a second water flushing pipe 15 and a second air flushing pipe 16 are butted on the connecting pipe; a filter plate 10 is arranged on the inner cross section of the filter 8, a filter layer 9 made of ultra-light filter materials is arranged below the filter plate 10, the bottom of the filter 8 is butted with a flushing wastewater discharge pipe 14, a first air flushing pipe 13 is introduced into the bottom of the filter 8, and a first water flushing pipe 12 is butted on the clean water pipe 11; each pipeline is provided with a valve which can control the independent connection and disconnection of the pipeline.
In the embodiment of the invention, each pipeline is provided with a valve capable of controlling the independent on-off of the pipeline, each pipeline has corresponding use according to a use method, and corresponding operation is completed by opening and closing the valve. Specifically, the raw water pipe 1, the air supply pipe 3, the flushing wastewater discharge pipe 14, the clear water pipe 11, the connecting pipe, the first air flushing pipe 13, the second air flushing pipe 16, the first water flushing pipe 12 and the second water flushing pipe 15 are all provided with valves capable of controlling the pipelines to be independently switched on and off.
In the embodiment of the invention, when a sufficient gravity head (h is more than or equal to 2.5 m) exists in the aeration tank 2, the connecting pipe can meet the requirement of water guide without additional power, and in order to meet the operation requirement of insufficient gravity head or more controllable operation, the connecting pipe is specifically provided with the vacuum meter 6 and the sewage pump 7.
In the embodiment of the invention, specifically, the filter cloth assembly 5 comprises a bracket 51 for positioning in the aeration tank 2, a frame 52 is fixed on the bracket 51, and a reinforcing bar 54 is arranged on the frame 52; the frame 52 and the reinforcing bars 54 form a clamping plate structure, a bag-shaped filter cloth bag 53 is arranged in the clamping plate structure to position the filter cloth bag 53, and a water outlet is arranged on the filter cloth bag 53 and is in butt joint with the connecting pipe. According to the actual application requirement, the air permeability of the filter cloth bag 53 is 20-120L/m 2 S. In the embodiment of the invention, the plate-frame type filter cloth component 5 is of a double-sided structure and is submerged in the aeration tank 2; the mixed liquor passes through the filter cloth from outside to inside under the action of differential pressure, suspended matters (activated sludge) with larger particle sizes are intercepted by the filter cloth, and suspended matters with smaller particle sizes pass through the filter cloth along with water flow to enter the component and finally flow out of the connecting pipe; the inner side and the outer side of the filter cloth are respectively provided with a certain number of reinforcing bars which play a supporting role in filtering and washing the filter cloth.
In the process of treating sewage, the sewage to be treated flows into an aeration tank 2 from a raw water pipe 1, and air enters the aeration tank 2 through an air supply pipe 3 and an aeration head 4 to provide dissolved oxygen necessary for metabolism for activated sludge in the tank; the filter cloth component 5 mainly plays a role in solid/liquid separation, cleaner water penetrates through the filter cloth under the suction action of the sewage pump 7 and flows out of the aeration tank 2 through a pipeline, activated sludge is intercepted in the aeration tank 2 by the filter cloth, and the change condition of the resistance of the filter cloth can be observed and calculated through the vacuum meter 6; the sewage pump 7 conveys the effluent of the filter cloth assembly 5 to the bottom of the ultra-light filter material filter 8 through a pipeline (the pipeline after entering the filter is a perforated pipe), then flows through the filter layer 9 and the filter plate 10 from bottom to top, and finally flows out from a clean water pipe 11. In addition, preferably, the filter cloth assembly 5 of the present invention is arranged right above the aeration head 4, and the bubbles released from the aeration head 4 also act as a shearing action on the sludge deposited on the surface of the filter cloth during the rising process, so as to prevent the deposited sludge from being too thick.
In the embodiment of the invention, the coarse filter cloth material (such as non-woven fabric, industrial filter cloth, etc.) is formedThe filter cloth component 5 is connected with a filter layer 9 formed by upward flow ultra-light filter materials (such as polystyrene filter materials) in series, and replaces the traditional microfiltration membrane (or ultrafiltration membrane) component. Wherein the air permeability of the filter cloth material is 20-120L/m 2 S, the filter cloth component 5 is submerged in the aeration tank 2 to serve as a first-stage filter medium, mainly plays a role in solid-liquid separation, and can intercept more than 90% of suspended matters (mainly activated sludge), so that the advantages of the traditional MBR can be retained, such as separation of hydraulic retention time and sludge retention time, higher MLSS, good effluent quality, small floor area, less residual sludge and the like; the upward flow ultra-light filter material filter 8 is arranged outside the aeration tank 2 and is used as a secondary filter medium to mainly play a role in further fine filtration, the turbidity of the effluent can be controlled below 20NTU, and the SS is less than 150mg/L. The turbidity and SS concentration of the water discharged from the upward flow ultra-light filter material filter 8 depend on the air permeability and flux of the filter cloth material, the particle size of the ultra-light filter material, the thickness of the filter layer 9, the filtering speed and other process parameters. If the turbidity and SS concentration of the final effluent are required to be lower, a filter cloth material with lower air permeability and smaller flux are selected, the thickness of a filter layer 9 of the upward flow ultralight filter material filter 8 is required to be larger, and the filtering speed is required to be smaller; on the contrary, the filter cloth material with larger air permeability and larger flux are selected, the thickness of the filter layer 9 of the upward flow ultra-light filter material filter 8 can be properly reduced, and the filter speed can be properly improved.
The invention further discloses a flushing method of the membrane bioreactor, which comprises the steps of flushing the filter cloth component 5 and flushing the filter layer 9; wherein, the washing process of the filter cloth component 5 is as follows:
(11) Filling water into the filter cloth assembly through a second water flushing pipe 15, and flushing the filter cloth from inside to outside; without stopping water flushing, air is rapidly introduced into the filter cloth assembly through the second air flushing pipe 16, so that the water pressure in the filter cloth assembly is suddenly increased, and high-speed water flow flushes the filter cloth from inside to outside;
(12) Stopping air flushing, performing air flushing after the filter cloth assembly is filled with water, and repeating the step (12) for 2-3 times; the washing wastewater is left in the aeration tank;
the washing of the filter layer 9 comprises the following steps:
(21) Air is introduced through the first air flushing pipe 13 to perform air flushing on the filter 8, bubbles pass through the filter layer 9 from bottom to top, and the filter material rotates and rubs with each other under the action of rising bubbles to peel off pollutants adsorbed on the surface of the filter material;
(22) Stopping the air blast, discharging the wastewater in the filter 8 through the washing wastewater discharge pipe 14, or discharging a proper amount of wastewater to make the ultra-light filter material fall and become loose under the action of losing buoyancy;
(23) Stopping the discharging, and injecting clean water from the top of the filter 8 through a first water flushing pipe 12 to flush the filter layer 9;
(24) The flushing is stopped and the flushing water in the filter chamber 8 is discharged through the flushing waste water discharge pipe 14.
The invention is tested, wherein the effective volume of the aeration tank 2 is 1.0m 3 The MLSS is 6000 to 12000mg/L, and the industrial filter cloth made of terylene material (the air permeability is 25L/m) 2 S) as a primary filter medium, is submerged in the aeration tank 2, and pumps water out by a sewage pump 7, and the flux of the filter cloth is 100-200L/m 2 H, the turbidity of the effluent of the filter cloth component 5 is 47.1-138.5 NTU, and SS is 337-883 mg/L; the upward flow ultra-light filter material filter 8 adopts polystyrene filter material with the grain diameter of 1.0-2.0 mm 80 <1.2, a filter layer 9 is 700mm thick, the filter is filtered from bottom to top by utilizing a pressure head in filter cloth effluent, the filtering speed is 1.5-6.0 m/h, and small test results show that after the Membrane Bioreactor (MBR) disclosed by the invention is used for treating domestic sewage, the final effluent turbidity is 10.0-18.0 NTU, and SS is less than 150mg/L, and the index meets the requirement of the water quality standard for discharging sewage into town sewers (GB/T31962-2015), so that the MBR can be used for treating percolate in a refuse transfer station instead of the traditional MBR. In addition, the price of the hollow fiber microfiltration membrane component used by the traditional MBR is generally 80-120 yuan/m 2 The flux is 5 to 10L/m 2 H, service life of about 1 year; the price of the industrial filter cloth adopted by the invention is about 10 yuan/m 2 The flux is 100-200L/m 2 H, the service life is 2-3 years; the price of the polystyrene ultra-light filter material is about 300-400 yuan/m 3 The service life is about 10 years. Therefore, the MBR of the invention has very low running cost (not more than 1/5 of that of the traditional MBR), effectively solves the problem of incrustation and crusting on the surface of the membrane caused by hardness, and has no operation managementIs often simple.
In addition, it was found in tests that the content of suspended matter in the outlet water of the filter cloth assembly gradually decreased with the increase of the filtration time. When the filtering time exceeds 6h, the effluent turbidity of the filter cloth component 5 can be less than 10NTU, the SS is less than 80mg/L, at the moment, the upward-flow ultra-light filter material filtering pool 8 can continuously run for 3-6 days, the effluent turbidity is between 0.2 and 1.3NTU, and the SS concentration is between 5 and 10mg/L. The two indexes respectively meet the requirements of water quality of urban waste water recycling urban miscellaneous water (GB 18920-2002), water quality of urban waste water recycling landscape environment water (GB/T18921-2002), water quality of urban waste water recycling industrial water (GB/T19923-2005), and pollutant emission standard of urban sewage treatment plants (GB 18918-2002) first-class A.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. A membrane bioreactor with serially connected filter media comprises an aeration tank and an upward flow ultralight filter material filter tank, wherein the top of the aeration tank is filled with water through a raw water pipe, the bottom of the aeration tank is filled with air through an air supply pipe, the air outlet end of the air supply pipe is connected with an aeration head, the water in the aeration tank is filled into the bottom of the filter tank through a connecting pipe, the top of the filter tank is connected with a clear water pipe,
a filter cloth component is arranged in the aeration tank, a filtered water outlet of the filter cloth component is in butt joint with a water inlet end of the connecting pipe, and the connecting pipe is in butt joint with a second water flushing pipe and a second air flushing pipe; a filter plate is arranged on the cross section in the filter tank, a filter layer made of ultra-light filter materials is arranged below the filter plate, the bottom of the filter tank is butted with a flushing wastewater discharge pipe, a first air flushing pipe is introduced into the bottom of the filter tank, and a first water flushing pipe is butted on the clear water pipe;
each pipeline is provided with a valve which can control the independent connection and disconnection of the pipeline.
2. The membrane bioreactor of claim 1, wherein the filter cloth assembly comprises a support for positioning within the aeration tank, the support having a frame secured thereto, the frame having reinforcing bars; the frame, arrangement of reinforcement constitute the splint structure, set up bag form filter cloth package in this splint structure, be equipped with the delivery port on the filter cloth package, this delivery port butt joint the connecting pipe.
3. The membrane bioreactor of claim 2, wherein the air permeability of the filter cloth pack is 20 to 120L/m 2 ·s。
4. The membrane bioreactor of claim 1, wherein the connecting tube and the first air washpipe are uniformly perforated on the tube body in the filter tank.
5. The membrane bioreactor of claim 1, wherein a vacuum gauge and a sewage pump are provided on the connecting tube.
6. The membrane bioreactor of claim 1, wherein the filter cloth assembly is disposed directly above the aerator.
7. A method for flushing a membrane bioreactor according to any one of claims 1 to 6, wherein the flushing comprises flushing of a filter cloth assembly and flushing of a filter layer; wherein, the first and the second end of the pipe are connected with each other,
the filter cloth component washing process comprises the following steps:
(11) Filling water into the filter cloth assembly through a second water flushing pipe, and flushing the filter cloth from inside to outside; without stopping water flushing, quickly introducing air into the filter cloth assembly through the second air flushing pipe to enable the water pressure in the filter cloth assembly to be increased suddenly, and enabling high-speed water flow to flush the filter cloth from inside to outside;
(12) Stopping air flushing, performing air flushing after the filter cloth assembly is filled with water, and repeating the step (12) for 2-3 times;
the filter layer flushing comprises the following steps:
(21) Air is introduced through the first air flushing pipe to perform air flushing on the filter, and air bubbles pass through the filter layer from bottom to top;
(22) Stopping the air blast, and discharging the wastewater in the filter tank through a washing wastewater discharge pipe or discharging a proper amount of wastewater to enable the ultralight filter material to fall and become loose under the action of losing buoyancy;
(23) Stopping the discharging, and injecting clear water from the top of the filter tank through a first water flushing pipe to flush the filter layer;
(4) And stopping the flushing, and discharging flushing water in the filter tank through a flushing wastewater discharge pipe.
CN202211152230.0A 2022-09-21 2022-09-21 Filter medium series type membrane bioreactor and flushing method thereof Pending CN115465945A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211152230.0A CN115465945A (en) 2022-09-21 2022-09-21 Filter medium series type membrane bioreactor and flushing method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211152230.0A CN115465945A (en) 2022-09-21 2022-09-21 Filter medium series type membrane bioreactor and flushing method thereof

Publications (1)

Publication Number Publication Date
CN115465945A true CN115465945A (en) 2022-12-13

Family

ID=84335904

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211152230.0A Pending CN115465945A (en) 2022-09-21 2022-09-21 Filter medium series type membrane bioreactor and flushing method thereof

Country Status (1)

Country Link
CN (1) CN115465945A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203235339U (en) * 2013-04-27 2013-10-16 同济大学 Self-forming dynamic membrane filtering component with vacuum suction cleaning equipment
CN106267932A (en) * 2016-09-26 2017-01-04 徐州工程学院 A kind of upward flow floating media filter
CN205974188U (en) * 2016-08-24 2017-02-22 广东水清环保科技有限公司 Wastewater treatment system
CN113457231A (en) * 2021-08-13 2021-10-01 徐州工程学院 Washing method of ultra-light filter material filter tank
CN214829740U (en) * 2021-01-29 2021-11-23 上海市机电设计研究院有限公司 Sewage enhanced phosphorus removal system based on AO + MBR process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203235339U (en) * 2013-04-27 2013-10-16 同济大学 Self-forming dynamic membrane filtering component with vacuum suction cleaning equipment
CN205974188U (en) * 2016-08-24 2017-02-22 广东水清环保科技有限公司 Wastewater treatment system
CN106267932A (en) * 2016-09-26 2017-01-04 徐州工程学院 A kind of upward flow floating media filter
CN214829740U (en) * 2021-01-29 2021-11-23 上海市机电设计研究院有限公司 Sewage enhanced phosphorus removal system based on AO + MBR process
CN113457231A (en) * 2021-08-13 2021-10-01 徐州工程学院 Washing method of ultra-light filter material filter tank

Similar Documents

Publication Publication Date Title
CN102030390B (en) Membrane precision filter for wastewater treatment and application thereof
CN107021597A (en) Improve the system and method for biochemical and deeply treating wastewater using Powdered Activated Carbon
CN101434444B (en) Membrane bioreactor and use thereof in wastewater treatment
CN103351056B (en) Apparatus and method of online chemical backwashing membrane assembly
CN102553450B (en) Method for preventing split membrane bio-reactor (MBR) flat membrane pollution
KR101860291B1 (en) Filter apparatus with air diffuser and wastewater treatment system including the same
CN101434435B (en) Method and apparatus for using aerating biological filter in advanced treatment of dyeing waste water
CN107986436A (en) A kind of biology membrane-membrane biological coupling sewage-treatment plant
CN102976555A (en) Integrated air floatation-membrane bioreactor
CN202924871U (en) Integrated air flotation-membrane bioreactor
CN113697903A (en) Zero-medicament short-flow membrane direct filtration system and sewage treatment method
CN200988816Y (en) Garbage percolating liquid treating system based on film biological reactor-filter film technology
CN209143980U (en) A kind of water-jet loom waste water treatment system
CN115465945A (en) Filter medium series type membrane bioreactor and flushing method thereof
CN101269873A (en) Method and apparatus for recycling membrane-bioreactor sewage water
CN108483794B (en) Sewage treatment system
CN216986709U (en) Unpowered sponge filler advanced treatment filter equipment
CN1331774C (en) Tubular dynamic membrane reactor for biological catalytic oxidation
CN215161380U (en) External anaerobic MBR device
CN201317703Y (en) Biological aerated filter used for printing and dyeing wastewater advanced processing device
CN208802923U (en) A kind of municipal domestic sewage treatment device
CN207002534U (en) A kind of sewage disposal device
CN207276417U (en) A kind of ceramic membrane aeration and micro-positive pressure ozone film reused water processing device
CN201098608Y (en) Integrated membrane filter and filtration system
JP4335193B2 (en) Method and apparatus for treating organic wastewater

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination