CN117699977A - EGA intelligent tank and method for sewage treatment based on aerobic MBBR tank - Google Patents
EGA intelligent tank and method for sewage treatment based on aerobic MBBR tank Download PDFInfo
- Publication number
- CN117699977A CN117699977A CN202410110948.6A CN202410110948A CN117699977A CN 117699977 A CN117699977 A CN 117699977A CN 202410110948 A CN202410110948 A CN 202410110948A CN 117699977 A CN117699977 A CN 117699977A
- Authority
- CN
- China
- Prior art keywords
- transmission
- ega
- tank
- shaft
- bridging
- 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.)
- Granted
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 30
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 163
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000000712 assembly Effects 0.000 claims abstract description 22
- 238000000429 assembly Methods 0.000 claims abstract description 22
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 239000001301 oxygen Substances 0.000 claims abstract description 6
- 239000000725 suspension Substances 0.000 claims description 22
- 239000000969 carrier Substances 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 6
- 230000033001 locomotion Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000010287 polarization Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 241000894006 Bacteria Species 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 239000010802 sludge Substances 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 6
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F3/1263—Sequencing batch reactors [SBR]
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact processes
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
-
- 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)
- 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)
- Biodiversity & Conservation Biology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an EGA intelligent tank and a method for sewage treatment based on an aerobic MBBR tank, and relates to the technical field of sewage treatment, the EGA intelligent tank comprises an EGA intelligent tank, wherein two ends of the EGA intelligent tank are respectively connected with a water inlet pipe and a water outlet pipe, and an oxygen eliminating tank plate, an anaerobic filter bed plate and a biological filter plate are sequentially arranged in the EGA intelligent tank in the direction from the water inlet pipe to the water outlet pipe; and a plurality of lower transmission assemblies are rotatably connected to the EGA intelligent tank at positions corresponding to the positions between the anaerobic filter bed plate and the biological filter plate. According to the invention, the eccentric vibrators rotate to generate vibration, and the two groups of eccentric vibrators rotate in different directions, so that vibration with different frequencies is generated, the vibration acts on the conveyor belt indirectly through the transmission box, sewage attached to the surface of the conveyor belt under the action of the vibration can fall off to a certain extent, and the dehydrated conveyor belt performs electrostatic electret when flowing through the upper layer piano wire and the lower layer piano wire, so that electrostatic adsorption effect can be generated, and bacteria in the sewage are actively adsorbed.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an EGA intelligent tank and method for sewage treatment based on an aerobic MBBR tank.
Background
The moving bed biological film reactor is a novel biological film reactor, and is an improved novel composite biological film reactor developed on the basis of a fixed bed reactor, a fluidized bed reactor and a biological filter. The method overcomes the defects that the fixed bed reactor needs regular back flushing, the fluidized bed reactor needs carrier fluidization, the submerged biofilter is blocked and needs complex operation of cleaning filter materials and replacing an aerator, and the characteristics of impact load resistance, low sludge yield and long sludge age of the traditional biofilm method are maintained. Compared with the activated sludge process, the method has the advantages that more nitrifying bacteria can be maintained due to longer mud age, and better denitrification effect is achieved. The main principle is that after sewage continuously flows through a reactor filling carrier, a biological film is formed on the carrier, and microorganisms propagate and grow on the biological film in a large quantity and degrade organic pollutants in the sewage, so that the sewage purifying effect is achieved.
The prior art discloses an invention patent in the technical field of partial sewage treatment, wherein the invention patent with the application number of CN201910140188.2 discloses a carrier fluidized MBBR moving bed biomembrane reactor and a carrier fluidized MBBR moving bed biomembrane reactor process, the reactor comprises a plurality of reactors and annular water injection pipes, the reactor is in a hexagonal prism shape, a sludge discharge pedestal is arranged at the center of the lower bottom surface of the inner part of the reactor, a circle of aeration devices I are arranged around the outer side of the circumference of the sludge discharge pedestal, a water distribution ring pipe is arranged on the inner wall of the reactor and is respectively communicated with each water injection port through a water distribution connecting pipe, and a water outlet is arranged at the upper end of the right side of the reactor; the middle part in the reactor is provided with a reaction plug-in assembly which comprises a carrier plate, an inner ring plate, a pedestal butt joint plate, a center column and a center carrier plate; the inside of the reactor is correspondingly provided with a guide plate respectively with each prismatic surface, the guide plates are connected with the outer wall of the inner annular plate through connecting rods, the connecting parts of the guide plates and the connecting rods are provided with adjusting shafts, and two adjacent guide plates are connected through waterproof cloth respectively. The invention has the advantages of convenient disassembly and assembly, small occupied area, high efficiency and high purification efficiency, and the technical scheme still has some defects in the application process, when the sewage is treated by adopting the biomembrane technology, the traditional passive treatment mode is still adopted, harmful substances in the sewage can be purified only when passing through the biomembrane, but the sewage has a certain dead angle in the process of flowing in the EGA intelligent tank, so that the sewage treatment purification degree is limited.
Based on the above, the invention designs an EGA intelligent tank and a method for sewage treatment based on an aerobic MBBR tank, so as to solve the problems.
Disclosure of Invention
The invention aims at: in order to solve the problem, an EGA intelligent tank and a method for sewage treatment based on an aerobic MBBR tank are provided.
In order to achieve the above purpose, the present invention provides the following technical solutions: an EGA intelligent tank for sewage treatment based on an aerobic MBBR tank comprises an EGA intelligent tank, wherein two ends of the EGA intelligent tank are respectively connected with a water inlet pipe and a water outlet pipe, and an oxygen eliminating tank plate, an anaerobic filter bed plate and a biological filter plate are sequentially arranged in the EGA intelligent tank in the direction from the water inlet pipe to the water outlet pipe;
a plurality of lower layer transmission assemblies are rotationally connected to the EGA intelligent tank at positions corresponding to the positions between the anaerobic filter bed plate and the biological filter tank plate, a plurality of upper layer transmission assemblies are rotationally connected to the EGA intelligent tank at positions corresponding to the positions above the lower layer transmission assemblies, a bottom layer transmission assembly is rotationally connected to the EGA intelligent tank at positions corresponding to the positions below the lower layer transmission assemblies, the same conveyor belt is in transmission connection among the bottom layer transmission assembly, the lower layer transmission assemblies and the upper layer transmission assemblies, and a plurality of planting inlets are formed in the conveyor belt and used for discharging suspension carriers;
and an electrostatic electret assembly is arranged on the conveyor belt at a position corresponding to the upper transmission assembly.
As still further aspects of the invention: the lower layer transmission assembly, the upper layer transmission assembly and the bottom layer transmission assembly have the same structure, the lower layer transmission assembly comprises two transmission shafts, the two transmission shafts are all rotationally connected to the EGA intelligent groove, one ends of the two transmission shafts, which are close, are all connected with bridging devices, and one ends of the two bridging devices, which are close, are connected with transmission rollers;
the conveyor belt is in transmission connection with a plurality of lower layer transmission assembly built-in driving rollers, a plurality of lower layer transmission assembly built-in driving rollers and a bottom layer transmission assembly built-in driving roller.
As still further aspects of the invention: the bridging device comprises a bridging shell, the bridging shell is connected to the end part of the transmission shaft, a bridging inner core is connected to the inner side of the bridging shell in an embedded mode, and a plurality of inner layer switching frames in an annular array are connected to the circumferential surface of the bridging inner core.
As still further aspects of the invention: the inner side of the inner layer switching frame is rotationally connected with an inner layer switching shaft, an inner layer switching spring is sleeved on a first rotating shaft between the inner layer switching shaft and the inner layer switching frame, and the first rotating shaft is elastically switched with the inner layer switching frame through the first switching spring.
As still further aspects of the invention: the other end of inlayer switching axle is connected with the buffering axle, the other end of buffering axle has cup jointed the buffering section of thick bamboo, the epaxial bridging spring that has cup jointed of buffering, the buffering section of thick bamboo is connected with inlayer switching axle elastic support through bridging spring, the other end of buffering section of thick bamboo is connected with outer switching axle, the epaxial outer switching frame that rotates of outer switching is connected with, outer switching spring has been cup jointed in the second pivot between outer switching axle and the outer switching frame, the second pivot is through outer switching spring and outer switching frame elastic switching, the other end of outer switching frame is connected on the inner wall of bridging shell.
As still further aspects of the invention: the electrostatic electret assembly comprises an upper layer piano wire and a lower layer piano wire, and the lower layer piano wire and the upper layer piano wire are clamped on the EGA intelligent groove through insulating sleeves at positions corresponding to the upper layer transmission assembly;
the lower layer piano wire and the lower layer piano wire are respectively located at the inner side and the outer side of the conveyor belt, the end parts of the lower layer piano wire and the upper layer piano wire are electrically connected with bridging wires, and the bridging wires are electrically connected with main wires.
As still further aspects of the invention: the vibration dewatering assembly comprises a transmission box, the transmission box is abutted to the transmission belt, two vibrating shafts are rotatably connected to the inner side of the transmission box, a plurality of eccentric vibrators are connected to the two vibrating shafts, and a box cover plate is connected to the transmission box in a sealing mode.
As still further aspects of the invention: the vibration shafts are rotatably connected to the EGA intelligent groove, an upper layer transmission gear and a lower layer transmission gear are respectively sleeved on the two vibration shafts, and the lower layer transmission gear and the upper layer transmission gear are meshed with each other.
As still further aspects of the invention: the vibration shaft is sleeved with a driven wheel, a driving wheel is sleeved on a transmission shaft arranged in one upper transmission assembly, the driving wheel and the driven wheel are sleeved with the same transmission belt, and the wheel diameter of the driving wheel is larger than that of the driven wheel.
An EGA intelligent tank using method for sewage treatment based on an aerobic MBBR tank comprises the following steps:
s1, installing driving equipment on a transmission shaft sleeved with a driving wheel, controlling the driving equipment to operate, driving the transmission shaft to rotate in the working process by the driving equipment, driving a transmission belt to circularly flow on a plurality of transmission rollers in the rotating process by the transmission shaft, sequentially treating sewage through an anaerobic tank and an anaerobic filter bed after entering an EGA intelligent tank through a water inlet pipe, entering a position between the anaerobic filter bed plate and a biological filter bed plate, and embedding a plurality of suspension carriers on the transmission belt under the circulation flow, wherein the plurality of suspension carriers can carry out biological purification treatment on the sewage flowing through;
s2, as the suspension carrier has certain hardness, the bridging device is assembled between the transmission shaft and the transmission roller, when the suspension carrier acts on the transmission roller, the transmission roller is extruded by the suspension carrier, under the action of pressure, the transmission roller deflects on the inner side of the bridging shell through the bridging inner core, in the process, the bridging inner core drives the inner layer switching frames to apply tension to the inner layer switching frames, the inner layer switching frames rotate on the inner side of the inner layer switching frames and twist the inner layer switching springs to elastically deform, the outer layer switching frames rotate on the inner side of the outer layer switching frames and twist the outer layer switching springs to elastically deform, and the buffer shaft correspondingly stretches on the inner side of the buffer cylinder and pulls or extrudes the bridging springs to elastically stretch;
s3, in the process of transfer belt circulation, the driving device drives the driving wheel to rotate, the driving wheel drives the driven wheel to do accelerated motion through the driving belt, the driven wheel drives one of the transmission shafts to rotate, the transmission shaft drives the other transmission shaft to rotate through the upper layer transmission gear and the lower layer transmission gear, the rotation directions of the two transmission shafts are reciprocal, the eccentric vibrators can be driven to rotate in the process of quick rotation due to the transmission shafts, vibration of different frequencies can be generated due to the fact that the rotation directions of the two eccentric vibrators are different, the vibration acts on the driving belt through the driving box, sewage attached to the lower surface of the driving belt under the vibration can fall off to a certain extent, and the dehydrated driving belt carries out electrostatic electret when flowing through the upper layer piano wire and the lower layer piano wire.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the eccentric vibrators rotate to generate vibration, and as the rotation directions of the two groups of eccentric vibrators are different, the vibration can generate vibration with different frequencies, the vibration acts on the conveyor belt indirectly through the transmission box, sewage attached to the surface of the conveyor belt can fall off to a certain extent under the action of the vibration, and the dehydrated conveyor belt performs electrostatic electret when flowing through the upper layer piano wire and the lower layer piano wire, so that electrostatic adsorption effect can be generated, bacteria in the sewage are actively adsorbed, and the sewage treatment efficiency is improved;
2. according to the invention, the bridging inner core drives the inner layer switching frames to apply tension to the inner layer switching frames, the inner layer switching frames rotate on the inner sides of the inner layer switching frames and twist the inner layer switching springs to elastically deform, the outer layer switching frames rotate on the inner sides of the outer layer switching frames and twist the outer layer switching springs to elastically deform, the buffer shafts do corresponding telescopic motions on the inner sides of the buffer cylinders and pull or squeeze the bridging springs to elastically stretch and retract, and the elastic acting force generated when the outer layer switching springs, the inner layer switching springs and the bridging springs elastically deform is utilized, so that a multi-angle buffer effect can be provided for the driving roller, the excessive pressure is prevented, the deformation of the suspension carrier is caused, and the integrity of the biological film on the suspension carrier is ensured;
3. according to the invention, after sewage enters the EGA intelligent tank through the water inlet pipe, and then enters the position between the anaerobic filter bed plate and the biological filter bed plate after being treated by the anaerobic filter bed in sequence, a plurality of suspension carriers are inlaid on the conveyor belt under circulation flow, the suspension carriers can carry out biological purification treatment on the sewage flowing through, the suspension carriers are suspended on the conveyor belt, the suspension carriers can be ensured to be fully contacted with a carbon source and air dissolved in the sewage on the basis of ensuring normal flow of the sewage, the adhesion and growth of biological films are facilitated, and in the non-aeration time of static culture, the driving equipment is controlled to run at a low speed, the full contact with the carbon source and the air is promoted, the rotation of the driving roller can also perturb the inoculated sludge to a certain extent, the sludge is prevented from being always deposited at the bottom of the tank, and the driving roller and the conveyor belt can play a role of cutting off the sludge with larger volume.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the lower transmission assembly of the present invention;
FIG. 3 is a schematic view of the vibration dewatering assembly of the present invention shown in a broken away configuration;
FIG. 4 is a schematic view of another view of the present invention;
FIG. 5 is an enlarged schematic view of the structure of FIG. 4A according to the present invention;
FIG. 6 is a schematic diagram of a bridge device according to the present invention;
FIG. 7 is a schematic view in partial cross-section of the present invention;
FIG. 8 is a schematic illustration of the structure of the present invention shown in a broken away state;
FIG. 9 is a schematic view of another view of the present invention shown in a broken away configuration;
fig. 10 is an enlarged schematic view of the structure of fig. 9B according to the present invention.
In the figure: 1. EGA intelligent groove; 2. a water inlet pipe; 3. a water outlet pipe; 4. an oxygen eliminating pool plate; 5. an anaerobic filter bed board; 6. a biological filter plate; 7. a lower layer transmission assembly; 701. a transmission shaft; 702. bridging means; 7021. a bridging housing; 7022. bridging the inner core; 7023. an inner layer switching frame; 7024. an inner layer switching shaft; 7025. an inner layer switching spring; 7026. a bridge spring; 7027. a buffer shaft; 7028. a buffer tube; 7029. an outer layer switching shaft; 7030. an outer layer switching frame; 7031. an outer layer switching spring; 703. a driving roller; 8. an upper layer transmission assembly; 9. a conveyor belt; 10. vibrating the water removal assembly; 1001. a transmission box; 1002. a vibration shaft; 1003. an eccentric vibrator; 1004. a box cover plate; 1005. an upper layer transmission gear; 1006. lower layer transmission side gears; 1007. driven wheel; 1008. a transmission belt; 1009. a driving wheel; 11. a bottom layer transmission assembly; 12. an electrostatic electret assembly; 1201. an upper layer piano wire; 1202. a lower layer piano wire; 1203. bridge wire; 1204. a main line.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "configured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Hereinafter, an embodiment of the present invention will be described in accordance with its entire structure.
Referring to fig. 1 to 10, in the embodiment of the invention, an EGA intelligent tank 1 for sewage treatment based on an aerobic MBBR tank comprises an EGA intelligent tank 1, wherein two ends of the EGA intelligent tank 1 are respectively connected with a water inlet pipe 2 and a water outlet pipe 3, and an oxygen eliminating tank plate 4, an anaerobic filter bed plate 5 and a biological filter plate 6 are sequentially arranged in the EGA intelligent tank 1 in the direction from the water inlet pipe 2 to the water outlet pipe 3;
a plurality of lower layer transmission assemblies 7 are rotatably connected to the EGA intelligent tank 1 corresponding to the positions between the anaerobic filter bed plate 5 and the biological filter bed plate 6, a plurality of upper layer transmission assemblies 8 are rotatably connected to the EGA intelligent tank 1 corresponding to the positions above the plurality of lower layer transmission assemblies 7, a lower layer transmission assembly 11 is rotatably connected to the EGA intelligent tank 1 corresponding to the positions below the plurality of lower layer transmission assemblies 7, the same conveyor belt 9 is in transmission connection among the lower layer transmission assemblies 11, the plurality of lower layer transmission assemblies 7 and the plurality of upper layer transmission assemblies 8, and a plurality of implantation openings are formed in the conveyor belt 9 and used for discharging suspended carriers;
an electrostatic electret assembly 12 is arranged on the conveyor belt 9 at a position corresponding to the upper transmission assembly 8.
Referring to fig. 1 to 10, the lower layer transmission assembly 7, the upper layer transmission assembly 8 and the bottom layer transmission assembly 11 have the same structure, the lower layer transmission assembly 7 comprises two transmission shafts 701, the two transmission shafts 701 are rotatably connected to the EGA intelligent tank 1, one ends of the two transmission shafts 701, which are close, are connected with bridging devices 702, and one ends of the two bridging devices 702, which are close, are connected with transmission rollers 703;
the conveyor belt 9 is in transmission connection with a plurality of built-in driving rollers 703 of the lower layer driving assembly 7, a plurality of built-in driving rollers 703 of the lower layer driving assembly 7 and built-in driving rollers 703 of the bottom layer driving assembly 11.
Referring to fig. 1 to 10, the bridging device 702 includes a bridging housing 7021, the bridging housing 7021 is connected to an end of the transmission shaft 701, a bridging inner core 7022 is connected to an inner side of the bridging housing 7021 in an embedded manner, and a plurality of inner layer adaptor frames 7023 in an annular array are connected to a circumferential surface of the bridging inner core 7022.
Referring to fig. 1 to 10, an inner layer switching shaft 7024 is rotatably connected to the inner side of the inner layer switching frame 7023, an inner layer switching spring 7025 is sleeved on a first rotating shaft between the inner layer switching shaft 7024 and the inner layer switching frame 7023, and the first rotating shaft is elastically switched with the inner layer switching frame 7023 through the first switching spring.
Referring to fig. 1 to 10, the other end of the inner layer switching shaft 7024 is connected with a buffer shaft 7027, the other end of the buffer shaft 7027 is sleeved with a buffer tube 7028, the buffer shaft 7027 is sleeved with a bridging spring 7026, the buffer tube 7028 is elastically supported and connected with the inner layer switching shaft 7024 through the bridging spring 7026, the other end of the buffer tube 7028 is connected with an outer layer switching shaft 7029, the outer layer switching shaft 7029 is rotatably connected with an outer layer switching frame 7030, a second rotating shaft between the outer layer switching shaft 7029 and the outer layer switching frame 7030 is sleeved with an outer layer switching spring 7031, the second rotating shaft is elastically switched with the outer layer switching frame 7030 through the outer layer switching spring 7031, and the other end of the outer layer switching frame 7030 is connected to the inner wall of the bridging shell 7021.
Referring to fig. 1 to 10, the electrostatic electret assembly 12 comprises an upper layer piano wire 1201 and a lower layer piano wire 1202, wherein the lower layer piano wire 1202 and the upper layer piano wire 1201 are clamped on the EGA intelligent tank 1 through insulating sleeves at positions corresponding to the upper layer transmission assembly 8;
the lower layer piano wire 1202 and the lower layer piano wire 1202 are respectively located on the inner side and the outer side of the conveyor belt 9, the ends of the lower layer piano wire 1202 and the upper layer piano wire 1201 are electrically connected with bridging wires 1203, and the bridging wires 1203 are electrically connected with main wires 1204.
Referring to fig. 1 to 10, a vibration dewatering assembly 10 is connected to a conveyor belt 9, the vibration dewatering assembly 10 includes a driving box 1001, the driving box 1001 is abutted to the conveyor belt 9, two vibration shafts 1002 are rotatably connected to the inner side of the driving box 1001, a plurality of eccentric vibrators 1003 are connected to the two vibration shafts 1002, and a box cover plate 1004 is connected to the driving box 1001 in a sealing manner.
Referring to fig. 1 to 10, the vibration shafts 1002 are rotatably connected to the EGA smart groove 1, and an upper transmission gear 1005 and a lower transmission gear are respectively sleeved on the two vibration shafts 1002, and the lower transmission gear and the upper transmission gear 1005 are meshed with each other.
Referring to fig. 1 to 10, a driven wheel 1007 is sleeved on the vibration shaft 1002, a driving wheel 1009 is sleeved on a transmission shaft 701 arranged in one upper transmission assembly 8, the driving wheel 1009 and the driven wheel 1007 are sleeved with the same transmission belt 1008, and the wheel diameter of the driving wheel 1009 is larger than that of the driven wheel 1007.
An application method of an EGA intelligent tank 1 for sewage treatment based on an aerobic MBBR tank comprises the following steps:
s1, a driving device is arranged on a transmission shaft 701 sleeved with a driving wheel 1009, the driving device is controlled to operate, the driving device drives the transmission shaft 701 to rotate in the working process, the transmission shaft 701 drives a transmission belt 1008 to circularly flow on a plurality of transmission rollers 703 in the rotating process, sewage enters an EGA intelligent tank 1 through a water inlet pipe 2, sequentially enters a position between an anaerobic filter bed plate 5 and a biological filter bed plate after being treated by an anaerobic tank and an anaerobic filter bed, a plurality of suspension carriers are embedded on a transmission belt 9 under the circulation flow, and the plurality of suspension carriers carry out biological purification treatment on the sewage flowing through;
s2, as the suspension carrier has certain hardness, the bridging device 702 is assembled between the transmission shaft 701 and the transmission roller 703, when the suspension carrier acts on the transmission roller 703, the transmission roller 703 is extruded by the suspension carrier, under the action of pressure, the transmission roller 703 deflects on the inner side of the bridging shell 7021 through the bridging inner core 7022, in the process, the bridging inner core 7022 simultaneously drives the plurality of inner layer switching frames 7023 to apply tension to the inner layer switching shaft 7024, the inner layer switching shaft 7024 rotates on the inner side of the inner layer switching frame 7023 and twists the inner layer switching spring 7025 to elastically deform, the outer layer switching shaft 7029 rotates on the inner side of the outer layer switching frame 7030 and twists the outer layer switching spring 7031 to elastically deform, and the buffer shaft 7027 correspondingly stretches on the inner side of the buffer cylinder 7028 and pulls or extrudes the bridging spring 7026 to elastically stretch;
s3, in the circulation process of the conveyor belt 9, the driving device drives the driving wheel 1009 to rotate, the driving wheel 1009 drives the driven wheel 1007 to do acceleration motion through the driving belt 1008, the driven wheel 1007 drives one of the transmission shafts 701 to rotate, the transmission shafts 701 drive the other transmission shaft 701 to rotate through the upper layer transmission gear 1005 and the lower layer transmission gear, the rotation directions of the two transmission shafts 701 are reciprocal, the eccentric vibrators 1003 can be driven to rotate in the fast rotation process of the transmission shafts 701, vibration can be generated by the rotation of the eccentric vibrators 1003, vibration can be generated at different frequencies due to different rotation directions of the two eccentric vibrators 1003, the vibration indirectly acts on the conveyor belt 9 through the driving box 1001, sewage attached to the surface of the conveyor belt 9 under the vibration can fall off to a certain extent, and the dehydrated conveyor belt 9 carries out electrostatic electret when flowing through the upper layer piano wire 1201 and the lower layer piano wire 1202.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed equally within the scope of the present invention.
Claims (10)
1. The EGA intelligent tank (1) for sewage treatment based on an aerobic MBBR tank comprises the EGA intelligent tank (1), and is characterized in that two ends of the EGA intelligent tank (1) are respectively connected with a water inlet pipe (2) and a water outlet pipe (3), and an oxygen eliminating Chi Ban (4), an anaerobic filter bed plate (5) and a biological filter plate (6) are sequentially arranged in the EGA intelligent tank (1) in the direction from the water inlet pipe (2) to the water outlet pipe (3);
a plurality of lower layer transmission assemblies (7) are rotatably connected to positions, corresponding to positions between the anaerobic filter bed plate (5) and the biological filter plate (6), on the EGA intelligent tank (1), a plurality of upper layer transmission assemblies (8) are rotatably connected to positions, corresponding to positions above the lower layer transmission assemblies (7), on the EGA intelligent tank (1), a bottom layer transmission assembly (11) is rotatably connected to positions below the lower layer transmission assemblies (7), and the same transmission belt (9) is in transmission connection among the bottom layer transmission assembly (11), the lower layer transmission assemblies (7) and the upper layer transmission assemblies (8), and a plurality of planting inlets are formed in the transmission belt (9) and used for discharging suspended carriers;
an electrostatic electret component (12) is arranged on the conveyor belt (9) at a position corresponding to the upper-layer transmission component (8).
2. The EGA intelligent tank (1) for sewage treatment based on the aerobic MBBR tank according to claim 1, wherein the lower layer transmission assembly (7), the upper layer transmission assembly (8) and the bottom layer transmission assembly (11) have the same structure, the lower layer transmission assembly (7) comprises two transmission shafts (701), the two transmission shafts (701) are both rotationally connected to the EGA intelligent tank (1), one ends of the two transmission shafts (701) close to each other are both connected with bridging devices (702), and one ends of the two bridging devices (702) close to each other are connected with transmission rollers (703);
the conveyor belt (9) is in transmission connection with a plurality of built-in transmission rollers (703) of the lower transmission assemblies (7), a plurality of built-in transmission rollers (703) of the lower transmission assemblies (7) and a built-in transmission roller (703) of the bottom transmission assembly (11).
3. The EGA intelligent tank (1) for sewage treatment based on an aerobic MBBR pool according to claim 1, wherein the bridging device (702) comprises a bridging shell (7021), the bridging shell (7021) is connected to the end of a transmission shaft (701), a bridging inner core (7022) is connected to the inner side of the bridging shell (7021) in an embedded manner, and a plurality of inner layer switching frames (7023) in an annular array are connected to the circumferential surface of the bridging inner core (7022).
4. An EGA intelligent tank (1) for sewage treatment based on an aerobic MBBR pool according to claim 3, characterized in that, the inner side of the inner layer switching frame (7023) is rotatably connected with an inner layer switching shaft (7024), an inner layer switching spring (7025) is sleeved on a first rotating shaft between the inner layer switching shaft (7024) and the inner layer switching frame (7023), and the first rotating shaft is elastically switched with the inner layer switching frame (7023) through the first switching spring.
5. The EGA intelligent tank (1) for sewage treatment based on an aerobic MBBR pool according to claim 4, wherein the other end of the inner layer switching shaft (7024) is connected with a buffer shaft (7027), the other end of the buffer shaft (7027) is sleeved with a buffer cylinder (7028), the buffer shaft (7027) is sleeved with a bridging spring (7026), the buffer cylinder (7028) is elastically supported and connected with the inner layer switching shaft (7024) through the bridging spring (7026), the other end of the buffer cylinder (7028) is connected with an outer layer switching shaft (7029), an outer layer switching frame (7030) is rotationally connected on the outer layer switching shaft (7029), an outer layer switching spring (7031) is sleeved on a second rotating shaft between the outer layer switching shaft (7029) and the outer layer switching frame (7030), the second rotating shaft is elastically switched with the outer layer switching frame (7030) through the outer layer switching spring (7031), and the other end of the outer layer switching frame (7030) is connected to the inner wall of the bridging shell (7021).
6. The EGA intelligent tank (1) for sewage treatment based on the aerobic MBBR tank according to claim 1, wherein the electrostatic electret assembly (12) comprises an upper layer piano wire (1201) and a lower layer piano wire (1202), and the lower layer piano wire (1202) and the upper layer piano wire (1201) are clamped on the EGA intelligent tank (1) at positions corresponding to the upper layer transmission assembly (8) through insulating sleeves;
the lower layer piano wire (1202) and the lower layer piano wire (1202) are respectively located at the inner side and the outer side of the conveyor belt (9), the ends of the lower layer piano wire (1202) and the upper layer piano wire (1201) are electrically connected with bridging wires (1203), and the bridging wires (1203) are electrically connected with main wires (1204).
7. The EGA intelligent tank (1) for sewage treatment based on the aerobic MBBR tank according to claim 1, wherein the conveying belt (9) is connected with a vibration dewatering assembly (10), the vibration dewatering assembly (10) comprises a transmission box (1001), the transmission box (1001) is abutted to the conveying belt (9), two vibrating shafts (1002) are rotatably connected to the inner side of the transmission box (1001), a plurality of eccentric vibrators (1003) are connected to the two vibrating shafts (1002), and a box cover plate (1004) is connected to the transmission box (1001) in a sealing mode.
8. The EGA intelligent tank (1) for sewage treatment based on the aerobic MBBR tank according to claim 7, wherein the vibrating shafts (1002) are rotatably connected to the EGA intelligent tank (1), an upper transmission gear (1005) and a lower transmission gear are respectively sleeved on the two vibrating shafts (1002), and the lower transmission gear and the upper transmission gear (1005) are meshed with each other.
9. The EGA intelligent tank (1) for sewage treatment based on the aerobic MBBR tank according to claim 8, wherein a driven wheel (1007) is sleeved on the vibrating shaft (1002), a driving wheel (1009) is sleeved on a built-in transmission shaft (701) of one upper transmission assembly (8), the driving wheel (1009) and the driven wheel (1007) are sleeved with the same transmission belt (1008), and the wheel diameter of the driving wheel (1009) is larger than that of the driven wheel (1007).
10. Use of an EGA intelligent tank (1) for sewage treatment based on an aerobic MBBR pond according to any of claims 1-9, characterized in that it comprises the following steps:
s1, a driving device is arranged on a transmission shaft (701) sleeved with a driving wheel (1009), the driving device is controlled to operate, the driving device drives the transmission shaft (701) to rotate in the working process, the transmission shaft (701) drives a transmission belt (1008) to circularly flow on a plurality of transmission rollers (703) in the rotating process, sewage enters an EGA intelligent tank (1) through a water inlet pipe (2), sequentially passes through an oxygen eliminating tank and an anaerobic filter bed, enters a position between an anaerobic filter bed plate (5) and a biological filter bed plate, a plurality of suspension carriers are embedded on a transmission belt (9) in the circulating flow, and the plurality of suspension carriers carry out biological purification treatment on the sewage flowing through;
s2, due to the fact that the suspension carrier has certain hardness, a bridging device (702) is assembled between a transmission shaft (701) and a transmission roller (703), when the suspension carrier acts on the transmission roller (703), the transmission roller (703) is extruded by the suspension carrier, under the action of pressure, the transmission roller (703) deflects at the inner side of a bridging shell (7021) through a bridging inner core (7022), in the process, the bridging inner core (7022) drives a plurality of inner layer switching frames (7023) to apply tension to an inner layer switching shaft (7024), the inner layer switching shaft (7024) rotates at the inner side of the inner layer switching frame (7023) and twists an inner layer switching spring (7025), an outer layer switching shaft (7029) rotates at the inner side of an outer layer switching frame (7030), and twists an outer layer switching spring (7031) to elastically deform, and a buffer shaft (7027) correspondingly stretches or extrudes at the inner side of a buffer cylinder (7028) to elastically stretch and contract;
s3, in the circulation process of the conveying belt (9), the driving device drives the driving wheel (1009) to rotate, the driving wheel (1009) drives the driven wheel (1007) to do accelerated motion through the driving belt (1008), the driven wheel (1007) drives one of the driving shafts (701) to rotate, the driving shaft (701) drives the other driving shaft (701) to rotate through an upper layer driving gear (1005) and a lower layer driving gear, the rotation directions of the two driving shafts (701) are reciprocal, the eccentric vibrators (1003) can be driven to rotate in the fast rotation process of the driving shaft (701), vibration can be generated due to the fact that the rotation directions of the two eccentric vibrators (1003) are different, vibration with different frequencies can be generated, the vibration indirectly acts on the conveying belt (9) through the driving box (1001), sewage attached to the surface of the conveying belt (9) under the vibration can fall off to a certain extent, and the dehydrated conveying belt (9) can carry out electrostatic polarization when flowing through the upper layer piano wire (1201) and the lower layer piano wire (1202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410110948.6A CN117699977B (en) | 2024-01-26 | 2024-01-26 | EGA intelligent tank and method for sewage treatment based on aerobic MBBR tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410110948.6A CN117699977B (en) | 2024-01-26 | 2024-01-26 | EGA intelligent tank and method for sewage treatment based on aerobic MBBR tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117699977A true CN117699977A (en) | 2024-03-15 |
| CN117699977B CN117699977B (en) | 2024-05-17 |
Family
ID=90162670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410110948.6A Active CN117699977B (en) | 2024-01-26 | 2024-01-26 | EGA intelligent tank and method for sewage treatment based on aerobic MBBR tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117699977B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01155990A (en) * | 1987-12-10 | 1989-06-19 | Nkk Corp | Multimodule biomembrane filter device |
| KR100671974B1 (en) * | 2006-10-14 | 2007-01-24 | (주)정도엔지니어링 | The pier collapse prevention infrastructure |
| CN108083437A (en) * | 2018-01-02 | 2018-05-29 | 江苏裕隆环保有限公司 | A kind of rural domestic sewage treating device and treatment process |
| CN109231714A (en) * | 2018-11-09 | 2019-01-18 | 鞍钢股份有限公司 | Sewage sludge treatment method and device |
| CN110326992A (en) * | 2019-07-02 | 2019-10-15 | 航天凯天环保科技股份有限公司 | A kind of separation of solid and liquid water-saving ecological lavatory |
| CN211498438U (en) * | 2019-12-10 | 2020-09-15 | 常友功 | Public road bridge roof beam buffer stop |
| CN113800338A (en) * | 2021-08-23 | 2021-12-17 | 覃刚 | Pay-off is used in electric power construction |
| CN116332345A (en) * | 2022-12-25 | 2023-06-27 | 山东建筑大学 | Mobile filler post-endogenous denitrification deep denitrification sewage treatment system and technology |
-
2024
- 2024-01-26 CN CN202410110948.6A patent/CN117699977B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01155990A (en) * | 1987-12-10 | 1989-06-19 | Nkk Corp | Multimodule biomembrane filter device |
| KR100671974B1 (en) * | 2006-10-14 | 2007-01-24 | (주)정도엔지니어링 | The pier collapse prevention infrastructure |
| CN108083437A (en) * | 2018-01-02 | 2018-05-29 | 江苏裕隆环保有限公司 | A kind of rural domestic sewage treating device and treatment process |
| CN109231714A (en) * | 2018-11-09 | 2019-01-18 | 鞍钢股份有限公司 | Sewage sludge treatment method and device |
| CN110326992A (en) * | 2019-07-02 | 2019-10-15 | 航天凯天环保科技股份有限公司 | A kind of separation of solid and liquid water-saving ecological lavatory |
| CN211498438U (en) * | 2019-12-10 | 2020-09-15 | 常友功 | Public road bridge roof beam buffer stop |
| CN113800338A (en) * | 2021-08-23 | 2021-12-17 | 覃刚 | Pay-off is used in electric power construction |
| CN116332345A (en) * | 2022-12-25 | 2023-06-27 | 山东建筑大学 | Mobile filler post-endogenous denitrification deep denitrification sewage treatment system and technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117699977B (en) | 2024-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101481174B (en) | V shaped groove type microgrid component capable of continuously on-line updating dynamic membrane and use method thereof | |
| CN101492202A (en) | Micro-net dynamic membrane bioreactor for continuously updating dynamic membrane | |
| CN109912017B (en) | Sewage treatment device and sewage treatment method of magnetic force reinforced MBR | |
| CN117699977B (en) | EGA intelligent tank and method for sewage treatment based on aerobic MBBR tank | |
| CN109912016B (en) | Carrier fluidized MBBR moving bed biofilm reactor and process | |
| CN107365028B (en) | Ecological water body restoration device and restoration method | |
| CN209815909U (en) | System for biologically coupling photocatalysis synchronous processing is difficult for degrading organic waste water | |
| CN1730410A (en) | Improved bioreactor | |
| CN112759069B (en) | MBBR and MBR coupling device and method | |
| CN209835745U (en) | MBR's sewage treatment plant is reinforceed to magnetic force | |
| CN114162962A (en) | Biological bed with spring steel wire net frame combined packing | |
| CN118084196B (en) | EHBR (intensive biological reactor) powerful biological coupling membrane purification device for breeding tail water | |
| CN2719834Y (en) | Improved bioreactor | |
| CN219860813U (en) | Micro-power biological filter bed water treatment equipment | |
| CN221397538U (en) | Film-hanging water purifying device suitable for industrial circulating water culture | |
| CN104528920A (en) | Method and device for purifying river water | |
| CN219194748U (en) | Biological film water treatment purifying equipment | |
| CN210313704U (en) | Ladder arrangement type biological filter based on nano mesoporous filter material | |
| CN216472724U (en) | Integrated MBBR (moving bed biofilm reactor) equipment | |
| CN220056585U (en) | Be applicable to aquaculture trade denitrogenation integration equipment | |
| CN216918770U (en) | Composite membrane bioreactor | |
| CN220976694U (en) | MBBR pond suspended filler interception filter screen system | |
| CN115925118B (en) | Baffling type sewage biological treatment system and treatment process thereof | |
| CN212640082U (en) | Microbial film-hanging floating island for water purification | |
| CN214571001U (en) | Biological aerated filter based on modular installation |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |