CN110589968A - MBBR filler and biofilm reactor - Google Patents
MBBR filler and biofilm reactor Download PDFInfo
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- CN110589968A CN110589968A CN201911016457.0A CN201911016457A CN110589968A CN 110589968 A CN110589968 A CN 110589968A CN 201911016457 A CN201911016457 A CN 201911016457A CN 110589968 A CN110589968 A CN 110589968A
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- cylinder
- connecting ribs
- filler
- mbbr
- packing
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- 239000000945 filler Substances 0.000 title claims abstract description 86
- 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 14
- 238000012856 packing Methods 0.000 claims abstract description 56
- 230000000694 effects Effects 0.000 abstract description 26
- 238000012546 transfer Methods 0.000 abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 17
- 238000005273 aeration Methods 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 10
- 239000001301 oxygen Substances 0.000 description 10
- 229910052760 oxygen Inorganic materials 0.000 description 10
- 230000032770 biofilm formation Effects 0.000 description 8
- 239000010865 sewage Substances 0.000 description 8
- 241001148470 aerobic bacillus Species 0.000 description 7
- 239000012528 membrane Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 238000005202 decontamination Methods 0.000 description 6
- 230000003588 decontaminative effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000002349 favourable effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005243 fluidization Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 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
- 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
Abstract
The application provides an MBBR filler and a biofilm reactor. The MBBR filler includes filler body and a plurality of splice bar. The packing body comprises a hollow cylindrical barrel body which comprises a corrugated inner surface and a corrugated outer surface. The plurality of connecting ribs extend from the inside of the cylinder to the outside of the cylinder along the radial direction of the cylinder. Filaments are arranged on the inner surface of the folds, the outer surface of the folds and/or the outer surface of the connecting ribs of the cylinder body. The MBBR filler in the embodiment of the application can increase the mass transfer efficiency and the specific surface area of organisms and water, and has better film forming speed and film forming effect.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to an MBBR filler and a biofilm reactor.
Background
The MBBR (Moving Bed Biofilm Reactor) process belongs to a novel sewage Biofilm process treatment process, and the method improves the biomass and the biological species in a Reactor by adding a certain amount of suspension carriers into the Reactor, thereby improving the treatment efficiency of the Reactor. As the density of the filler is close to that of water, the filler is completely mixed with the water during aeration, and the environment for the growth of microorganisms is three phases of gas, liquid and solid. The collision and shearing action of the carrier in water makes air bubbles finer, and the utilization rate of oxygen is increased. In addition, each carrier has different biological species inside and outside, anaerobic bacteria or facultative bacteria grow inside, aerobic bacteria grow outside, each carrier is a micro-reactor, and nitrification reaction and denitrification reaction exist at the same time, so that the treatment effect is improved.
At present, the MBBR biological fluidized bed filler on the market can form a better suspension state in an aeration tank, and is usually made of plastics, so that the mass transfer efficiency of organisms and water is increased. Meanwhile, in order to improve the specific surface area, the outer layer of the conventional MBBR filler usually adopts a corrugated surface, a triangular surface and the like with folds or a concave-convex surface so as to increase the specific surface area and further increase the contact area between organisms and water. But the conventional MBBR biological fluidized bed filler has low film forming speed and unsatisfactory film forming effect.
Therefore, how to make the MBBR filler can increase the mass transfer efficiency and the specific surface area of organisms and water, has better film forming speed and becomes the key point of research and development of the sewage treatment industry.
Disclosure of Invention
The embodiments of the present application aim to provide an MBBR filler which can increase the mass transfer efficiency and specific surface area of organisms and water and has a better biofilm formation speed, and a biofilm reactor using the filler.
In a first aspect, embodiments of the present application provide an MBBR filler, including:
a packing body comprising a hollow cylindrical barrel comprising a pleated inner surface and a pleated outer surface;
the connecting ribs extend from the inside of the cylinder to the outside of the cylinder along the radial direction of the cylinder;
filaments are arranged on the inner surface of the folds, the outer surface of the folds and/or the outer surface of the connecting ribs of the cylinder body.
In the implementation process, the inner surface and the outer surface of the cylinder body are corrugated surfaces, so that the specific surface area of the filler is increased. Be provided with the filiform on the fold internal surface of barrel, fold surface and/or the surface of splice bar, because the existence of filiform makes MBBR filler itself adhere to the area greatly increased to make the speed of hanging the membrane accelerate and hang the membrane effect more excellent, and the hollow cylinder structure of filler body under the aeration state, the suspension is effectual, and mass transfer efficiency is high. In the aeration process, the filler is the suspended state, because the reason of aeration, the filler can be the state that constantly rolls in aqueous, fluidization state promptly, and the splice bar in this application embodiment extends to the barrel outside, and at the in-process that constantly rolls of filler, the splice bar can constantly collide, makes ageing biomembrane drop more easily, is favorable to the renewal of biomembrane. Therefore, the MBBR filler in the embodiment of the application can increase the mass transfer efficiency and the specific surface area of organisms and water, and has better film forming speed and film forming effect.
In one possible implementation manner, the number of the cylinders is multiple;
the plurality of the cylinder bodies are coaxially arranged and are sequentially sleeved along the radial direction of the cylinder bodies;
the connecting ribs extend from the inner part of the cylinder body on the innermost layer to the outer part of the cylinder body on the outermost layer along the radial direction of the cylinder body on the innermost layer.
In one possible implementation, the starting point of the plurality of connecting ribs in the cylinder where the connecting ribs start to extend outwards is located at the axis center of the packing body.
In the implementation process, the plurality of connecting ribs extend outwards along the inner diameter of the inner sleeve at the axis of the inner sleeve, the inner sleeve and the outer sleeve are divided into a plurality of small grids by the connecting ribs, each small grid forms an independent film hanging space, and the film hanging capacity of the film hanging space can be further increased by filaments in each film hanging space, so that the MBBR filler has a good film hanging effect.
In one possible implementation, the starting point of the plurality of connecting ribs in the cylinder where the connecting ribs start to extend outwards is at the same distance from the axial center of the packing body.
In the implementation process, the distance between the initial point of the connecting ribs in the cylinder, from which the connecting ribs extend outwards, and the axis of the packing body is the same, and a cylindrical first oxygen channel is formed at the axis of the packing body, so that aerobic bacteria in the reactor can survive better, and the decontamination treatment effect is improved.
In one possible implementation, the diameter of the innermost cylinder is in the range of 5-10 mm, and the diameter of the outermost cylinder is in the range of 10-30 mm.
In a possible implementation manner, the length of the connecting rib extending out of the outermost cylinder is 3-5 mm.
In a possible implementation manner, the connecting ribs are in a sheet shape, and a plurality of connecting ribs are circumferentially arranged around the axis of the filler body; the length of the flaky connecting ribs in the axial center direction of the filler body is equal to the length of the filler body.
At above-mentioned realization in-process, the slice splice bar extends to the other end from the one end of filler body, because the splice bar possess longest length in the axle center direction of filler body, when setting up filiform thing on the slice splice bar, the setting length of filiform thing in filler body axle center direction reaches the longest, so the splice bar has better biofilm culturing ability, and then improves the biofilm culturing effect that MBBR packed.
In another possible implementation manner, the flaky connecting ribs are arranged in a segmented manner in the axial center direction of the filler body, and the flaky connecting ribs of adjacent segments are spaced by a set distance.
In the implementation process, the flaky connecting ribs extend to the other end from one end of the packing body, and filaments are arranged on the flaky connecting ribs, so that the connecting ribs have better film hanging capacity, and meanwhile, the flaky connecting ribs are spaced at a preset distance, so that gaps between adjacent flaky connecting ribs extend along the radial direction of the radius of the packing body, and a second oxygen channel 500 with preset thickness (namely, the spaced preset distance between the adjacent flaky connecting ribs) is arranged in the axis direction of the packing body, so that aerobic bacteria in the reactor can better survive, and the decontamination treatment effect is improved.
In one possible implementation, the connecting rib is cylindrical in shape;
the connecting ribs are arranged in groups in the extending direction of the axis of the cylinder body;
each group of connecting ribs is circumferentially arranged around the axis of the filler body, and the connecting ribs of adjacent groups are separated by a preset distance.
In the implementation process, the connecting ribs of each group are circumferentially arranged around the axis of the filler body, and the cylindrical connecting ribs are provided with filaments, so that the connecting ribs have better film hanging capacity. Meanwhile, each group of connecting ribs are spaced at a preset distance, gaps between adjacent connecting rib groups extend along the radial direction of the radius of the packing body, and a third oxygen channel (similar to the second oxygen channel) with a preset thickness (namely the preset distance between the adjacent connecting rib groups) is arranged in the axis direction of the packing body, so that aerobic bacteria in the reactor can better survive, and the decontamination treatment effect is improved.
In one possible implementation, the filler body and the connecting rib form a central symmetrical structure.
In the implementation process, the filler body and the connecting ribs form a central symmetrical structure, so that the filler body rotates 180 degrees around the axis of the filler body, and the filler body completely coincides with the original structure after rotating, thereby further limiting the circumferential array arrangement of the connecting ribs around the axis of the filler body. The lattices separated by the connecting ribs are also arranged around the axis array of the filler body, so that the biofilm can be uniformly grown and the phenomenon of nonuniform biofilm formation caused by different sizes of gaps is avoided.
In a second aspect, embodiments of the present application also provide a biofilm reactor comprising an MBBR packing as described above.
According to the technical scheme, the inner surface and the outer surface of the cylinder of the MBBR filler in the embodiment of the application are corrugated surfaces, so that the specific surface area of the filler is increased. The setting up of filiform makes MBBR filler itself adhere to the area greatly increased to make the speed of biofilm formation accelerate and the biofilm formation effect is more excellent, and the hollow cylinder structure of filler body is under the aeration state, and the suspension is effectual, and mass transfer efficiency is high. The design that the connecting ribs extend to the outside of the cylinder body enables the aged biological membrane to fall off more easily, and is beneficial to updating of the biological membrane. Therefore, the MBBR filler in the embodiment of the application can increase the mass transfer efficiency and the specific surface area of organisms and water, and has better film forming speed and film forming effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of an MBBR filler according to an embodiment of the present application;
FIG. 2 shows an enlarged view of a portion of the barrel in the MBBR filler shown in FIG. 1;
FIG. 3 is a schematic structural diagram of an MBBR filler according to an embodiment of the present application;
FIG. 4 is a schematic diagram of the structure of an MBBR packing according to another embodiment of the present application;
FIG. 5 is a schematic diagram of the structure of an MBBR packing according to another embodiment of the present application;
FIG. 6 is a cross-sectional view of an MBBR filler with spaced apart tie bars according to an embodiment of the present application;
fig. 7 is a cross-sectional view of a tie bar according to another embodiment of the present application.
Icon: 100-a filler body; 110-a cylinder; 111-pleated inner surface; 112-corrugated outer surface; 200-connecting ribs; 300-filaments; 400-a first oxygen channel; 500-second oxygen channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a schematic structural diagram of an MBBR filler according to an embodiment of the present application. Referring to fig. 1, the MBBR packing includes a packing body 100 and a plurality of connection ribs 200.
The packing body 100 comprises a hollow cylindrical barrel 110, the barrel 110 comprising a corrugated inner surface 111 and a corrugated outer surface 112. The plurality of connection ribs 200 extend from the inside of the cylinder 110 to the outside of the cylinder 110 in the radial direction of the cylinder 110. Figure 2 shows an enlarged view of a portion of the barrel in the MBBR packing shown in figure 1. Referring to fig. 2, the pleated inner surface 111, the pleated outer surface 112, and the outer surface of the connector ribs 200 of the barrel 110 are provided with filaments 300. The filaments 300 are spread over the setting surface on which they are disposed.
It should be noted that, the inner pleated surface 111, the outer pleated surface 112 of the cylinder 110 and the outer surface of the connecting rib 200 are all provided with the filament 300, which is one of the implementations, and the filament 300 may be provided on only one of the inner pleated surface 111, the outer pleated surface 112 of the cylinder 110 and the outer surface of the connecting rib 200, or may be provided on any two of the three.
As a possible implementation, the material of the filament 300 is a fiber filament. It should be noted that the use of filament 300 is merely exemplary, and any flexible filament 300 having a relatively small diameter is within the scope of the present application.
In the implementation process, the inner surface and the outer surface of the cylinder 110 are corrugated surfaces, so that the specific surface area of the filler is increased. The filaments 300 are arranged on the inner surface 111 of the folds, the outer surface 112 of the folds and/or the outer surface of the connecting ribs 200 of the cylinder body 110, and the existence of the filaments 300 greatly increases the attachment area of the MBBR filler, so that the film hanging speed is increased, the film hanging effect is better, and the hollow cylinder body 110 structure of the filler body 100 has good suspension effect and high mass transfer efficiency in an aeration state. In the aeration process, the filler is the suspended state, because the reason of aeration, the filler can be the state that constantly rolls in aqueous, fluidization state promptly, and the splice bar 200 in this application embodiment extends to the barrel 110 outside, and at the in-process that constantly rolls of filler, the splice bar 200 can constantly collide, makes ageing biomembrane drop more easily, is favorable to the renewal of biomembrane. Therefore, the MBBR filler in the embodiment of the application can increase the mass transfer efficiency and the specific surface area of organisms and water, and has better film forming speed and film forming effect.
In one possible implementation, the packing body 100 and the connecting ribs 200 may be made of plastic materials. Adopt the plastics material preparation, can make the structure that the MBBR packed lighter and graceful, the suspension is effectual to further improve mass transfer efficiency.
In one possible implementation, the number of the cylinders 110 in the MBBR packing is plural. Fig. 3 is a schematic structural diagram of an MBBR filler according to an embodiment of the present application. Referring to fig. 3, the MBBR packing comprises two cylinders 110. The two cylinders 110 are divided into an inner sleeve and an outer sleeve in the radial direction of the packing body. The two cylinders 110 are coaxially arranged and sequentially sleeved along the radial direction of the cylinders 110. The connection rib 200 extends from the inside of the inner sleeve to the outside of the outer sleeve in the radial direction of the inner cylinder 110. The pleated inner and outer surfaces 111, 112 of the two cylinders and/or the outer surface of the connector rib 200 may be provided with a pattern of filaments 300. Fig. 4 shows that filaments are provided only on the corrugated outer surface 112 of the outer sleeve and the outer surface of one of the connector ribs.
It should be noted that the number of the two cylinders 110 in the above embodiment is only exemplary, and the number of the cylinders 110 in the packing body 100 is not particularly limited in the present application, but the number of the cylinders 110 in the packing body 100 is preferably 1 to 3 in general according to the structural scale of the biofilm reactor currently on the market.
In one possible implementation, the starting point of the plurality of connecting ribs 200 in the cylinder 110 where they start to extend outward is located at the axial center of the packing body 100.
In the implementation process, referring to fig. 3, the plurality of connecting ribs 200 extend outwards along the inner diameter of the inner sleeve at the axis of the inner sleeve, and as can be seen from the structure in the figure, the inner cylinder and the outer cylinder are divided into a plurality of small cells by the connecting ribs 200, each small cell forms an independent film hanging space, and the filiform substance 300 in each film hanging space can further increase the film hanging capacity of the film hanging space, so that the MBBR filler has a good film hanging effect.
In another possible implementation, the starting point of the plurality of connecting ribs 200 in the cylinder 110 where they start to extend outward is at the same distance from the axial center of the packing body 100, see fig. 5.
In the implementation process, the starting point of the plurality of connecting ribs 200 in the cylinder 110 from which the plurality of connecting ribs start to extend outwards has the same distance from the axis of the packing body 100, and a cylindrical first oxygen channel 400 is formed at the axis of the packing body 100, so that aerobic bacteria in the reactor can better survive, and the decontamination treatment effect is further improved.
In one possible implementation, the packing body 100 and the connecting rib 200 constitute a central symmetrical structure. In the implementation process, the filler body 100 and the connecting ribs 200 form a central symmetrical structure, so that the filler body 100 rotates 180 degrees around the axis, and completely coincides with the original structure after rotating, thereby further limiting the circumferential array arrangement of the connecting ribs 200 around the axis of the filler body 100. The lattices separated by the connecting ribs 200 are also arranged around the axis of the filler body 100 in an array manner, so that the biofilm can be uniformly grown and biofilm formation can be avoided, and the phenomenon of nonuniform biofilm formation caused by different gaps is avoided.
In a possible implementation manner, the number of the connection ribs 200 is 4-12, when the number of the grids separated by the connection ribs 200 from the filler body 100 is too large and the gaps between the adjacent connection ribs 200 are too small, the biofilm in the sewage is easy to grow, and when the biofilm is gradually thickened and the gaps are completely filled, the mass transfer efficiency of pollutants in the water and the biofilm is reduced.
In one possible implementation, the connecting rib 200 is shaped like a sheet, and a plurality of connecting ribs 200 are circumferentially arranged around the axial center of the packing body 100. In one possible implementation, the length of the sheet-shaped connecting rib 200 in the axial direction of the packing body 100 is equal to the length of the cylinder 110. In the implementation process, the sheet-shaped connecting rib 200 extends from one end of the filler body 100 to the other end, and since the connecting rib 200 has the longest length in the axis direction of the filler body 100, when the filament 300 is arranged on the sheet-shaped connecting rib 200, the setting length of the filament 300 in the axis direction of the filler body 100 is the longest, the connecting rib 200 has better film hanging capacity, and further the film hanging effect of the MBBR filler is improved.
In another possible implementation manner, the flaky connecting ribs 200 are arranged in a segmented manner in the axial direction of the packing body 100, and adjacent segments of the flaky connecting ribs 200 are spaced by a set distance. Fig. 6 is a cross-sectional view of MBBR packing with spaced-apart tie bars according to an embodiment of the present application. Referring to fig. 6, the sheet-shaped connection rib 200 extends from one end to the other end of the packing body 100, and the connection rib 200 has a good film forming capability because the outer surface of the sheet-shaped connection rib 200 is covered with the filaments 300. Meanwhile, the flaky connecting ribs 200 are spaced at a predetermined distance, gaps between adjacent flaky connecting ribs 200 form second oxygen channels 500 which extend along the radial direction of the radius of the packing body 100 and have a predetermined thickness (namely, the predetermined distance between adjacent flaky connecting ribs 200) in the axial direction of the packing body 100, so that aerobic bacteria in the reactor can better survive, and the decontamination treatment effect is improved.
In another possible implementation, the connecting rib 200 is cylindrical in shape. Fig. 7 is a cross-sectional view of a tie-bar according to another embodiment of the present application, and referring to fig. 7, the outer surface of the tie-bar 200 is provided with a thread 300. The filaments 300 extend in four directions, where the filaments in one direction may be stacked filaments. The plurality of connection ribs 200 are arranged in groups in the direction in which the axis of the cylinder 110 extends. Each set of the connecting ribs 200 is circumferentially arranged around the axis of the packing body 100, and the connecting ribs 200 of adjacent sets are spaced apart by a predetermined distance.
In the implementation process, the connecting ribs 200 of each group are circumferentially arranged around the axis of the filler body 100, and the cylindrical connecting ribs 200 are provided with the filaments 300, so that the connecting ribs 200 have good film hanging capacity. Meanwhile, each group of connecting ribs 200 are spaced at a predetermined distance, gaps between adjacent groups of connecting ribs 200 form an oxygen channel which extends along the radial direction of the radius of the packing body 100 and has a predetermined thickness (namely, the predetermined distance between adjacent groups of connecting ribs 200) in the axis direction of the packing body 100, so that aerobic bacteria in the reactor can better survive, and the decontamination treatment effect is further improved.
As an alternative embodiment, the diameter of the innermost cylinder 110 ranges from 5 to 10mm, and the diameter of the outermost cylinder 110 ranges from 10 to 30 mm. When the diameter of the outermost cylinder 110 is greater than 30mm and the diameter of the innermost cylinder 110 is greater than 10mm, the gap between the cylinders 110 is large, which is not favorable for forming a fluid state in the filler and is not easy to form a biological film. When the diameter of the outermost layer cylinder body 110 is smaller than 10mm and the diameter of the innermost layer cylinder body 110 is smaller than 5mm, the space gap inside the filler is too small, the biological membrane is not easy to fall off, and the interception of the filler is not facilitated, so that the sewage is easy to flow off to a subsequent treatment unit along with water, and the sewage treatment effect is influenced.
When the diameter of the outermost layer cylinder body 110 is smaller than 10mm and the diameter of the innermost layer cylinder body 110 is smaller than 5mm, the growth speed of the biological film is high, the gap is blocked by the biological film quickly, the biological film is not easy to fall off and update, and the mass transfer efficiency is reduced.
In one implementation, the outermost cylinder 110 has a diameter of 10mm and the innermost cylinder 110 has a diameter of 5 mm.
In another implementation, the diameter of the outermost cylinder 110 is 20mm and the diameter of the innermost cylinder 110 is 8 mm.
In yet another implementation, the diameter of the outermost cylinder 110 is 30mm and the diameter of the innermost cylinder 110 is 10 mm. According to the three embodiments, the size of the middle gap has a good film hanging effect and a good film removing effect.
As an optional embodiment, the length range of the connection rib 200 extending out of the outermost cylinder 110 is 3-5mm, and when the length of the connection rib 200 extending out of the outermost cylinder 110 is greater than 5mm, adjacent MBBR fillers are mutually clamped in a fluidized state, so that the MBBR fillers are not distributed uniformly enough, and the sewage treatment effect is affected.
In a possible implementation manner, both the inner surface 111 and the outer surface 112 of the folds of the cylinder 110 constituting the packing body 100 are wavy or have triangular protrusions on the surfaces thereof, so as to increase the specific surface area of the packing, enlarge the growth area of microorganisms, and further improve the contact area of the biofilm and the sewage and the mass transfer efficiency.
In one possible implementation, when the packing body 100 includes a plurality of barrels 110, the plurality of barrels 110 are the same thickness.
In a second aspect, embodiments of the present application also provide a biofilm reactor comprising MBBR packing in any of the above structural forms.
According to the technical scheme, the inner surface and the outer surface of the cylinder 110 of the MBBR filler in the embodiment of the application are corrugated surfaces, so that the specific surface area of the filler is increased. The setting of silk 300 makes MBBR filler itself adhere to the area greatly increased to make the speed of biofilm formation accelerate and the biofilm formation effect is more excellent, and the hollow cylinder 110 structure of filler body 100 is under the aeration state, and the suspension is effectual, and mass transfer efficiency is high. The design that the connecting ribs 200 extend to the outside of the cylinder body 110 enables aged biological membranes to fall off more easily, and is beneficial to updating of the biological membranes. Therefore, the MBBR filler in the embodiment of the application can increase the mass transfer efficiency and the specific surface area of organisms and water, and has better film forming speed and film forming effect.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Claims (10)
1. An MBBR filler, comprising:
a packing body comprising a hollow cylindrical barrel comprising a pleated inner surface and a pleated outer surface;
the connecting ribs extend from the inside of the cylinder to the outside of the cylinder along the radial direction of the cylinder;
filaments are arranged on the inner surface of the folds, the outer surface of the folds and/or the outer surface of the connecting ribs of the cylinder body.
2. The MBBR packing of claim 1, wherein the number of said cylinders is plural;
the plurality of the cylinder bodies are coaxially arranged and are sequentially sleeved along the radial direction of the cylinder bodies;
the connecting ribs extend from the inner part of the cylinder body on the innermost layer to the outer part of the cylinder body on the outermost layer along the radial direction of the cylinder body on the innermost layer.
3. The MBBR packing of claim 1 or 2, wherein the plurality of tie bars start at an axial center of the packing body within the cylinder from which they start to extend outwardly.
4. The MBBR packing of claim 1 or 2, wherein the start point of the plurality of tie bars within the cylinder from which they begin to extend outwardly is the same distance from the axial center of the packing body.
5. The MBBR packing of claim 2, wherein the innermost cylinders have a diameter in the range of 5-10 mm and the outermost cylinders have a diameter in the range of 10-30 mm.
6. The MBBR packing of claim 2, wherein the tie bars extend 3-5 millimeters outside of the outermost cylinders.
7. The MBBR packing of claim 1, wherein the tie bars are sheet-like in shape, and a plurality of the tie bars are arranged circumferentially around an axial center of the packing body;
the length of the flaky connecting rib in the axial center direction of the filler body is equal to that of the filler body;
or
The flaky connecting ribs are arranged in a segmented mode in the axis direction of the filler body, and the flaky connecting ribs are arranged at adjacent segments at intervals.
8. The MBBR packing of claim 1, wherein the tie bars are cylindrical in shape;
the connecting ribs are arranged in groups in the extending direction of the axis of the cylinder body;
each group of connecting ribs is circumferentially arranged around the axis of the filler body, and the connecting ribs of adjacent groups are separated by a preset distance.
9. The MBBR packing of claim 8, wherein the packing body and the connecting ribs form a central symmetrical structure.
10. A biofilm reactor comprising an MBBR filler according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016457.0A CN110589968A (en) | 2019-10-23 | 2019-10-23 | MBBR filler and biofilm reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911016457.0A CN110589968A (en) | 2019-10-23 | 2019-10-23 | MBBR filler and biofilm reactor |
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| Publication Number | Publication Date |
|---|---|
| CN110589968A true CN110589968A (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911016457.0A Pending CN110589968A (en) | 2019-10-23 | 2019-10-23 | MBBR filler and biofilm reactor |
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| CN (1) | CN110589968A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114162962B (en) * | 2021-11-04 | 2023-05-23 | 凌志环保股份有限公司 | Biological bed with spring steel wire net rack combined packing |
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