CN108046415B

CN108046415B - Biological rotating disc

Info

Publication number: CN108046415B
Application number: CN201810084058.7A
Authority: CN
Inventors: 肖波; 黄世全; 黄光华
Original assignee: CSCEC Scimee Sci and Tech Co Ltd
Current assignee: CSCEC Scimee Sci and Tech Co Ltd
Priority date: 2018-01-29
Filing date: 2018-01-29
Publication date: 2023-10-20
Anticipated expiration: 2038-01-29
Also published as: CN108046415A

Abstract

The invention provides three biological turntables which are respectively used for fully realizing aerobic reaction, anaerobic reaction and combination of the aerobic reaction and the anaerobic reaction. Because the three biological rotating discs are all provided with the buoyancy device, a plurality of biological rotating discs can be directly put into a biological reaction tank of any water treatment process to fully degrade organic matters without constructing sewage treatment facilities such as a sedimentation tank, a contact reaction tank and the like, and the three biological rotating discs are applied to sewage treatment. In addition, when the disc rotates, an interaction thrust is formed between the disc group and sewage, so that the biological rotating disc can float relative to the sewage, and the covering capacity of the biological rotating disc for purifying the whole sewage is improved.

Description

Biological rotating disc

Technical Field

The invention relates to the technical field of sewage treatment equipment, in particular to three biological rotating discs.

Background

The biological rotating disc is one sewage treating apparatus with biomembrane process and includes mainly disc, rotating shaft, driving unit and contact reaction tank. When in operation, the disc part is immersed into the contact reaction tank filled with sewage, and the rotating shaft drives the disc to rotate continuously under the drive of the driving device. The disc is alternately contacted with sewage and air, and after a period of rotation, a layer of biological film is attached to the disc. The part of the disc which is rotated out of the reaction tank is contacted with air, and the air is continuously dissolved into a water film to increase the dissolved oxygen; the turntable is turned into the sewage part, and the biological film adsorbs organic pollutants in the sewage and absorbs dissolved oxygen in the external water film of the biological film to decompose the organic matters.

The sewage treatment process by using the existing biological rotating disc mainly comprises the following steps: the sewage, the primary sedimentation tank, the biological rotating disc and the secondary sedimentation tank have larger field area, higher construction investment and higher energy consumption, and the technical process is complex. And because of the structural limitation of the existing biological rotating disc, the biological rotating disc must rely on a contact reaction tank to realize operation.

Disclosure of Invention

The invention aims to provide three biological rotating discs which are used for sewage treatment singly or in combination, so that the construction investment and the occupied area of sewage treatment facilities can be reduced to a great extent, and the process is simple and the purification efficiency is high.

The technical scheme of the first biological rotating disc is as follows: a biological rotating disc comprises a first driving device, a first buoyancy device and at least one first disc group, wherein the first disc group comprises at least one first disc;

the first disc is used for microorganism adhesion; the first driving device is used for driving the first disc to rotate; the first buoyancy device is used for providing buoyancy, so that the first disc part is immersed in sewage and the first disc part is exposed to air.

Compared with the prior art, because the biological rotating disc is provided with the first buoyancy device, a plurality of biological rotating discs can be directly put into the biological reaction tank of any water treatment process to fully degrade organic matters without constructing sewage treatment facilities such as a sedimentation tank, a contact reaction tank and the like, and the biological rotating disc is applied to sewage treatment and has the characteristics of investment saving, low energy consumption, convenience in use, small occupied area and the like, and simultaneously, a plurality of biological rotating discs can be put into the biological reaction tank, so that the sewage treatment efficiency can be greatly improved.

In addition, when the first disc rotates, an interaction thrust is formed between the first disc group and sewage, so that the biological rotating disc can float relative to the sewage, and the covering capacity of the biological rotating disc for purifying the whole sewage is improved. And the reciprocating motion of the biological rotating disc in the sewage body can be realized by adjusting the steering of the driving device.

Preferably, the first buoyancy device comprises at least two first buoys, the first buoys are arranged on two sides of the first disc group, and the first buoys and the first disc group are positioned at the same position and height; the first disc group comprises a plurality of first discs, the first discs are connected in a penetrating way through a first rotating shaft, so that the first disc group is in a cylindrical structure, and a space exists between two adjacent first discs; the first driving device drives the first disc to rotate by driving the first rotating shaft. It should be understood that the specific structure of the biological rotating disc is not limited thereto.

Preferably, the number of the first disc groups is multiple, the multiple first disc groups are arranged side by side and in parallel, the first driving device drives one of the first disc groups to rotate, and two adjacent first disc groups are in transmission through friction or gears. By arranging a plurality of groups of first disc groups, the sewage purifying capacity of a single biological rotating disc can be improved. The first disc group is driven by the driving mode, so that the force supply requirement can be reduced, and the energy consumption is reduced; the multiple first disc groups only need to provide one set of first driving device, which is beneficial to controlling the cost.

The technical scheme of the second biological rotating disc is as follows: a biological rotating disc comprises a second driving device, a second buoyancy device and at least one second disc group, wherein the second disc group comprises at least one second disc;

the second disc is used for microorganism adhesion; the second driving device is used for driving the second disc to rotate; the second buoyancy device is used for providing buoyancy, so that the second disc is completely immersed in sewage and does not touch the bottom.

Compared with the prior art, the biological rotating disc has the advantages of the first biological rotating disc, and in addition, as the second disc group of the biological rotating disc is completely immersed in sewage, anaerobic bacteria can be attached and grown. Compared with the aerobic reaction, the anaerobic reaction has low sludge yield, so that sludge reflux is not needed; and the anaerobic microorganisms can degrade or partially degrade some organic matters which can not be degraded by the aerobic microorganisms, and the biological rotating disc can be applied to high-concentration organic wastewater treatment and large-particle organic solid particle degradation.

Preferably, the second buoyancy device comprises at least two second buoys, the second buoys are arranged at two sides of the second disc group, and the position height of the second buoys is higher than that of the second disc group; the second disc group comprises a plurality of second discs, the second discs are connected in a penetrating way through a second rotating shaft, so that the second disc group is in a cylindrical structure, and a space exists between two adjacent second discs; the second driving device drives the second rotating shaft to drive the second disc to rotate. It should be understood that the specific structure of the biological rotating disc is not limited thereto.

Preferably, the number of the second disc groups is multiple, the multiple second disc groups are arranged side by side and in parallel, the second driving device drives one of the second disc groups to rotate, and two adjacent second disc groups are driven by friction or gears. The second disc group is driven by the driving mode, so that the force supply requirement can be reduced, and the energy consumption is reduced; the second disc groups only need to provide one set of second driving device, which is beneficial to controlling the cost.

The technical scheme of the third biological rotating disc is as follows: a biological rotating disc comprises a third driving device, a third buoyancy device, at least one third disc group and at least one fourth disc group, wherein the third disc group comprises at least one third disc, and the fourth disc group comprises at least one fourth disc;

the third disc and the fourth disc are used for adhesion of microorganisms; the third driving device is used for driving the third disc and the fourth disc to rotate; the third buoyancy device is used for providing buoyancy, enabling the third disc to be partially immersed in sewage, partially exposed to air and enabling the fourth disc to be completely immersed in sewage without bottoming.

Compared with the prior art, the biological rotating disc has the advantages of the first biological rotating disc and the second biological rotating disc, and the anaerobic reaction is combined with the aerobic reaction, so that the absolute amount of organic matters removed by the anaerobic reaction is large, and the organic matters are thoroughly decomposed by the aerobic reaction.

During the degradation of organic matters, the anaerobic bacterial biomembrane plays the advantage of large absolute amount of the degraded organic matters, and degrades most of the organic matters, especially heavy-concentration sewage and large-particle solid organic particles; the aerobic bacterial biomembrane has the advantage of thoroughly or thoroughly degrading organic matters, and can thoroughly degrade medium-low concentration sewage and small-particle organic solid particles formed after the action of the anaerobic bacterial biomembrane so as to achieve better sewage purification effect.

Preferably, the buoyancy device comprises at least two third pontoons, and the third pontoons are arranged at two sides of the third disc group and the fourth disc group; the third disc group comprises a plurality of third discs, the plurality of third discs are connected in a penetrating way through a third rotating shaft, so that the third disc group is in a cylindrical structure, and a space exists between two adjacent third discs; the fourth disc group comprises a plurality of fourth discs, the fourth discs are connected in a penetrating way through a fourth rotating shaft, so that the fourth disc group is in a cylindrical structure, and a space exists between two adjacent first discs; the third driving device drives the third disc to rotate by driving the third rotating shaft, and drives the third disc to rotate by driving the fourth rotating shaft. It should be understood that the specific structure of the biological rotating disc is not limited thereto.

Preferably, the number of the third disc groups is two, and the number of the fourth disc groups is one; the two groups of third disc groups and one group of fourth disc groups are arranged in a space parallel and triangular mode, wherein the fourth disc groups are positioned below the two groups of third disc groups; the third buoyancy device comprises four groups of third pontoons, wherein two groups of third pontoons are respectively arranged at the left side and the right side of the two groups of third disc groups, and the other two groups of third pontoons are respectively arranged at the left side and the right side of the fourth disc group. The biological rotating disc provided by the technical scheme is light and small, has a simple and stable structure, has good floating stability in water, and is convenient to put in, salvage and recycle.

Preferably, the third driving device is used for driving one of the third disc groups to rotate, and the third buoyancy device enables the third driving device to be located above the water surface; the third disk group directly driven by the third driving device is in friction or gear transmission with the other third disk group, and the third disk group directly driven by the third driving device is in friction or gear transmission with the fourth disk group. When the biological rotating disc is driven by the driving mode, the force supply requirement can be reduced, and the energy consumption is reduced; the disc groups only need to provide one third driving device, which is beneficial to controlling the cost. And the third driving device is positioned above the water surface, so that the waterproof requirement can be reduced, and the waterproof cost can be reduced.

Preferably, the disc comprises a skeleton and a plurality of biofilm carriers carried on the skeleton, the biofilm carriers being for attachment of microorganisms to form a biofilm; the biological film carrier comprises a carrier inner core and a carrier coating, wherein the carrier inner core is made of a magnet or a magnetic conductive material and is used for magnetizing a water film on the surface of the biological film, the carrier coating is made of plastic or resin and is used for coating the carrier inner core, and the surface of the carrier coating is provided with a fold structure and a porous structure. The carrier kernel magnetizes the water film on the surface of the biological film, and the dissolved oxygen in the magnetized water film is greatly increased, so that the microorganism can perform full aerobic reaction, and the sewage treatment capacity is improved. And the magnetization of the water body can mineralize part of organic matters, improve the light absorption rate of the water and improve the solubility of inorganic salts, thereby being beneficial to the growth of algae and further improving the removal capability of N, P elements, heavy metal elements and small-particle organic pollutants. The carrier coating made of plastic or resin is wrapped on the surface of the carrier inner core, so that the hydrophilicity of the biomembrane carrier can be improved, microorganism adhesion growth is facilitated, and the carrier inner core can be protected from sewage corrosion. The surface of the carrier coating has a fold structure and a porous structure, so that the relative surface area of the biological film carrier can be increased, the adhesion of microorganisms can be increased, the adhesion of the biological film can be increased, and the possibility that the biological film is peeled off by water inlet can be reduced.

Preferably, the skeleton comprises an outer ring and an inner ring, the inner ring is used for sleeving the rotating shaft, the outer ring and the inner ring are connected through a connecting rod, a plurality of first magnets are arranged on the outer ring and/or the inner ring, a plurality of biomembrane carriers are arranged between the outer ring and the inner ring, the biomembrane carriers are connected in series through magnetic conducting wires to form a net structure, and the biomembrane carriers are connected with the first magnets through the magnetic conducting wires. By designing the disc into an annular structure and an internally hung net structure, compared with the existing disc, the disc has larger specific surface area and can attach more microorganisms. When the disc slowly rotates, the inflow water forms a plurality of small rotational flows under the longitudinal shearing of the skeleton outer ring and the biomembrane carrier reticular structure, so that the contact mixing, adsorption degradation and microbial metabolism of biomembrane and pollutants are greatly promoted.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing the structure of a biological rotating disc according to example 1.

Fig. 2 is a schematic view showing a fixing manner of the first disc set according to embodiment 1.

Fig. 3 is a schematic diagram of the first transmission mode described in embodiment 1.

Fig. 4 is a schematic diagram of a second transmission mode described in embodiment 1.

Fig. 5 is a schematic view showing the structure of a biological rotating disc according to example 2.

Fig. 6 is a schematic diagram of the biological rotating disc according to example 3.

FIG. 7 is a schematic diagram showing the structure of the biofilm carrier of example 4.

Fig. 8 is a schematic diagram showing the structure of a disc according to embodiment 4.

Fig. 9 is a schematic diagram showing the connection between the bio-film carrier and the magnetic conductive wire according to embodiment 4.

The reference numerals in the figures illustrate:

11-a first drive; 12-a first buoyancy device; 13-a first disc set; 1301-a first disk; 1302-a first rotational axis; 14-a power supply device; 21-a first scaffold; 22-a first sleeve; 31-friction wheel; 41-turning a gear; 42-a transmission gear 51-a second driving means; 52-a second buoyancy device; 53-a second disc set; 5301-a second disk; 5302-a second rotary shaft; 54-a second bracket; 55-gear set; 61-a third drive means; 62-a third buoyancy device; 63-a third disc set; 6301-third disc; 6302-third axis of rotation; 64-a fourth disc set; 6401-fourth disc; 65-a third bracket; 71-a framework; 7101-an outer ring; 7102-an inner ring; 7103-connecting rod; 72-biofilm carrier; 7201-a carrier core; 7202-coating of the carrier; 73-a first magnet; 74-magnetically permeable wires.

Description of the embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without creative efforts, are included in the protection scope of the present invention based on the embodiments of the present invention.

Example 1:

referring to fig. 1 to 4, the present embodiment provides a biological rotating disc, which includes a first driving device 11, a first buoyancy device 12, and at least one first disc set 13, where the first disc set 13 includes at least one first disc 1301.

In use, the first disc 1301 is partially immersed in water and the first disc set 13 is rotated by the first drive means 11. The first plate 1301 is alternately contacted with sewage and air, and after a period of rotation, a layer of biofilm of aerobic bacteria is attached to the first plate 1301. The part of the first disc 1301, from which sewage is transferred, is contacted with air, and the air is continuously dissolved into the water film to increase the dissolved oxygen thereof; the first disc 1301 transfers into the sewage portion, and the biofilm adsorbs organic pollutants in the sewage and absorbs dissolved oxygen in the biofilm external water film, so as to perform aerobic decomposition on the organic matters.

In the prior art, the biological rotating disc is fixedly erected in the contact reaction tank, but in the embodiment, the biological rotating disc floats on the water surface through the buoyancy device, so that the first disc 1301 is partially immersed in sewage and partially exposed in air. Compared with the existing biological rotating disc, the biological rotating disc has more use flexibility. The biological rotating disc can be directly put into the biological reaction tank of any water treatment process to fully degrade organic matters, and sewage treatment facilities such as a sedimentation tank and a contact reaction tank are not required to be built.

When the first disc 1301 rotates, an interactive thrust is generated with the water body, and by means of the thrust, the biological rotating disc can float relative to the water body, so that the coverage range of the single biological rotating disc for sewage purification is improved. In addition, the forward and reverse turning of the first driving device 11 can be adjusted regularly through the singlechip, so that the reciprocating motion of the biological rotating disc relative to the water body is realized, and the biological rotating disc is prevented from being detained at the bank of the biological reaction tank for a long time.

Referring to fig. 1, as an example of an implementation manner, in this embodiment, the first disc set 13 includes a plurality of first discs 1301, the plurality of first discs 1301 are overlapped with each other, and the first rotating shaft 1302 penetrates through the centers of the plurality of first discs 1301, so that the plurality of first discs 1301 are connected in series to form the first disc set 13. The first disc set 13 has a cylindrical structure, and a space exists between every two adjacent first discs 1301. The first driving device 11 drives the first rotation shaft 1302 to rotate the first disc 1301. The first buoyancy device 12 includes at least two first pontoons, which are disposed on both sides of the first disc group 13 and are located at the same position and height as the first disc group 13 in order to keep the biological rotating disc balanced. By way of example, the distance between two adjacent first discs 1301 is preferably 10mm to 200mm, the specific value being dependent on the BOD concentration in the wastewater. When the BOD concentration in the sewage is higher, a larger disc interval is selected, and when the BOD concentration in the sewage is smaller, a smaller disc interval is selected, so that the aim of ensuring that the whole biological rotating disc has a higher microorganism adhesion area and the disc interval is not blocked by a biological film is fulfilled. The diameter of the first disk 1301 is preferably 3m or less.

On the basis of the above-mentioned embodiments, as a more preferable embodiment, the biological rotating disc includes a plurality of first disc groups 13, and the plurality of first disc groups 13 are arranged side by side and in parallel, as shown in fig. 1. In order to reduce the power supply requirement and the energy consumption requirement, in the embodiment, the biological rotating disc only comprises one set of first driving device 11, one set of first disc groups 13 is driven by the first driving device 11 to rotate, and two adjacent sets of first disc groups 13 are in friction or gear transmission.

On the basis of the above two possible embodiments, the plurality of first disk groups 13 are fixed to the first bracket 21 by way of example by the first rotating shaft 1302. Referring to fig. 2, a first sleeve 22 is fixedly disposed on the first support 21, and two ends of each set of first rotating shafts 1302 are respectively sleeved with the first sleeve 22 through rotating bearings, so that each set of first disc sets 13 can rotate relative to the first support 21. The first driving device 11 is a motor, which is also mounted on the first bracket 21 and is located above the water surface, and drives the first rotating shaft 1302 of one of the first disc groups 13. When friction transmission is selected between two adjacent first disc groups 13, as shown in fig. 3, friction wheels 31 may be disposed at two ends of the first rotating shaft 1302 of each first disc group 13, the diameter of the friction wheels 31 is larger than that of the first discs 1301, and after the biological rotating disc is installed, the friction wheels 31 between the two adjacent first disc groups 13 are in contact with each other, and the first disc groups 13 directly driven by the first driving device 11 drive other first disc groups 13 to synchronously rotate through the friction wheels 31. When gear transmission is selected between two adjacent first disc groups 13, as shown in fig. 4, a rotating gear 41 is disposed at an end of a first rotating shaft 1302 of each first disc group 13, the diameter of the rotating gear 41 is smaller than that of the first disc 1301, a transmission gear 42 is disposed on the first bracket 21, the transmission gear 42 is connected with the first bracket 21 through a rotating bearing, the transmission gear 42 can rotate relative to the first bracket 21, and the first disc groups 13 directly driven by the first driving device 11 drive other first disc groups 13 to synchronously rotate through the transmission gear 42. In addition, the first buoyancy device 12 is also fixed by the first bracket 21, and the first buoyancy device 12 and the plurality of first disc groups 13 are positioned at the same height. In order to ensure the flexibility of the biological rotating disc, the first support 21 may be further provided with a power supply device 14, such as a battery. The power supply device 14 supplies power to the first driving means 11. But not limited thereto, the first driving device 11 may also be powered by a cable connected to an onshore power supply facility.

Example 2:

referring to fig. 5, the present embodiment provides a biological rotating disc, which includes a second driving device 51, a second buoyancy device 52, and at least one second disc set 53, wherein the second disc set 53 includes at least one second disc 5301.

As in example 1, the biological rotating disk according to this example floats itself on the water surface by the buoyancy means. Compared with the existing biological rotating disc, the biological rotating disc has more use flexibility. The biological rotating disc can be directly put into the biological reaction tank of any water treatment process to fully degrade organic matters, and sewage treatment facilities such as a sedimentation tank and a contact reaction tank are not required to be built.

Unlike both embodiment 1 and the prior art, the second disc set 53 in this embodiment is completely immersed in sewage. When in use, the second disc set 53 is driven by the second driving device 51 to rotate, and after a period of rotation, a layer of biological film of anaerobic bacteria will be attached to the second disc 5301, and the biological film degrades organic matters in the sewage body in an anaerobic reaction mode. When the second disk 5301 rotates, the water body can be sheared to form turbulence, which is beneficial to mixing, contacting, adsorbing and degrading organic matters of the biological film. Compared with the aerobic reaction, the anaerobic reaction has low sludge yield, so that sludge reflux is not needed; and anaerobic microorganisms can degrade or partially degrade some organic matters which can not be degraded by aerobic microorganisms, and the biological rotating disc can be applied to high-concentration organic wastewater treatment and large-particle organic solid particulate matters degradation.

Referring to fig. 5, as an example of an implementation manner, in this embodiment, the second disc set 53 includes a plurality of second discs 5301, the plurality of second discs 5301 are overlapped, the second rotation shaft 5302 penetrates through the centers of the plurality of second discs 5301, and the plurality of second discs 5301 are connected in series to form the second disc set 53 as a whole, which is the same as embodiment 1. The second disk group 53 has a cylindrical structure, and a space exists between every two adjacent second disks 5301. The second driving device 51 drives the second rotation shaft 5302 to rotate the second disk 5301. The second buoyancy device 52 includes at least two second pontoons, which are disposed at both sides of the second disc group 53 in order to balance the bio-disc, and the second pontoons are located at a higher level than the second disc group 53. By way of example, the distance between two adjacent second disks is preferably 10mm to 200mm, and the specific value is determined according to the BOD concentration in the sewage body. When the BOD concentration in the sewage is higher, a larger disc interval is selected, and when the BOD concentration in the sewage is smaller, a smaller disc interval is selected, so that the aim of ensuring that the whole biological rotating disc has a higher microorganism adhesion area and the disc interval is not blocked by a biological film is fulfilled. The diameter of the second disk 5301 is preferably 3m or less.

In addition to the above-described embodiments, as a more preferable embodiment, the biological rotating disc includes a plurality of second disc groups 53, and the plurality of second disc groups 53 are arranged side by side and in parallel as shown in fig. 5, as in example 1. In order to reduce the power supply requirement and the energy consumption requirement, in the present embodiment, the biological rotating disc only includes one set of second driving device 51, and the second driving device 51 drives one set of second disc groups 53 to rotate, and two adjacent sets of second disc groups 53 are in friction or gear transmission.

On the basis of the above two possible embodiments, the plurality of sets of second disk sets 53 are fixed to the second holder 54 by way of example through the second rotation shaft 5302. Specifically, the second support 54 is fixedly provided with a second sleeve, and two ends of each group of second rotating shafts 5302 are respectively sleeved with the second sleeve through rotating bearings, so that each group of second disc groups 53 can rotate relative to the second support 54. The second driving device 51 is a motor, which is also mounted on the second bracket 54 and is located above the water surface. Unlike embodiment 1, referring to fig. 5, since the motor is located on the water surface and the second rotation shafts 5302 are located below the water surface, the motor needs to be driven to the second rotation shafts 5302 below the water surface through the gear set 55. The transmission manner between the two adjacent second disc sets 53 is the same as that between the two adjacent first disc sets 13 in embodiment 1, and in detail, please refer to embodiment 1, and detailed description of this embodiment will not be provided. The second buoyancy device 52 is also disposed on the second bracket 54, and in order to achieve complete immersion of the second disk 5301 in water, the second buoyancy device 52 should be mounted at a position higher than the second disk group 53. Also in this embodiment, a power supply device 14, such as a battery, may be mounted on the second bracket 54 to supply power to the second driving means 51.

Example 3:

referring to fig. 6, the present embodiment provides a biological rotating disc, which includes a third driving device 61, a third buoyancy device 62, at least one third disc set 63 and at least one fourth disc set 64, wherein the third disc set 63 includes at least one third disc 6301, and the fourth disc set includes at least one fourth disc 6401.

As in example 1 and example 2, the biological rotating disc according to this example floats on the water surface by the buoyancy means as well. Compared with the existing biological rotating disc, the biological rotating disc has more use flexibility. The biological rotating disc can be directly put into the biological reaction tank of any water treatment process to fully degrade organic matters, and sewage treatment facilities such as a sedimentation tank and a contact reaction tank are not required to be built.

The biological rotating disc according to the present embodiment combines the technical advantages of the biological rotating discs according to embodiments 1 and 2, specifically, the third disc 6301 in the biological rotating disc according to the present embodiment is partially immersed in the sewage, partially exposed to the air, and the fourth disc 6401 is completely immersed in the sewage by providing buoyancy by the third buoyancy device 62. In use, the third disc set 63 rotates under the action of the third driving device 61, the third disc 6301 is alternately contacted with sewage and air, and after a period of rotation, a layer of biological film of aerobic bacteria is attached to the third disc 6301. The fourth disc set 64 rotates under the direct or indirect action of the third driving device 61, and after a period of rotation, a layer of biological film of anaerobic bacteria will adhere to the fourth disc 6401.

Referring to fig. 6, in this embodiment, as an example of an implementation manner, the third disc set 63 includes a plurality of third discs 6301, the plurality of third discs 6301 are overlapped with each other, a third rotation shaft 6302 penetrates through the centers of the plurality of third discs 6301, and the plurality of third discs 6301 are connected in series to form the third disc set 63 as a whole, which is the same as that of embodiment 1 and embodiment 2. The third disk group 63 has a cylindrical structure, and a space exists between every two adjacent third disks 6301. The third driving device 61 drives the third rotation shaft 6302 to rotate the third disk 6301. For example, the distance between two adjacent third discs 6301 is preferably 10mm to 200mm, and the specific value is determined according to the concentration of BOD in the sewage body. When the BOD concentration in the sewage is higher, a larger disc interval is selected, and when the BOD concentration in the sewage is smaller, a smaller disc interval is selected, so that the aim of ensuring that the whole biological rotating disc has a higher microorganism adhesion area and the disc interval is not blocked by a biological film is fulfilled. The diameter of the third disk 6301 is preferably 3m or less. The specific structure of the fourth disk stack 64 is similar to that of the third disk stack 63, and thus will not be described in detail. The third buoyancy means 62 comprises at least two third pontoons, which are arranged on both sides of the third disc group 63 and the fourth disc group 64 in order to balance the bio-disc.

On the basis of the above-mentioned embodiments, as a more preferable embodiment, the biological rotating disc includes two third disc groups 63 and one fourth disc group 64, and the two third disc groups 63 and the one fourth disc group 64 are spatially parallel and arranged in a triangle, wherein the fourth disc group 64 is located below the two third disc groups 63, as shown in fig. 6. Compared with other structural forms, the structure is more compact, the integration of each part is higher, the overall stability is stronger, and the external force impact resistance is facilitated. The third buoyancy device 62 includes four sets of third pontoons, two sets of third pontoons are disposed on the left and right sides of the two sets of third plate sets 63, and the other two sets of third pontoons are disposed on the left and right sides of the fourth plate set 64, as shown in fig. 6. As an example, two third disc groups 63, one fourth disc group 64 and four third pontoons are mounted on a third bracket 65, and a third sleeve is fixedly provided on the third bracket 65, as in embodiments 1 and 2, and the third disc group 63 and the fourth disc group 64 are sleeved on the third sleeve through a rotating bearing on a rotating shaft.

On the basis of the above-described embodiment, a set of third driving means 61 may be provided for each third disc set 63 and each fourth disc set 64, and as an example, the third driving means 61 may be a motor. However, in order to reduce the cost of the bio-disc and reduce the energy consumption during its use, it is preferable in the present embodiment to provide only one of the third disc sets 63 with the third driving device 61, and the third driving device 61 is mounted on the third support 65 above the water surface. As in embodiments 1 and 2, the third disk group 63 directly driven by the third driving device 61 is in friction or gear transmission with the other third disk group 63, and the third disk group 63 directly driven by the third driving device 61 is in friction or gear transmission with the fourth disk group 64. In specific embodiments, please refer to the corresponding technical scheme described in embodiment 1, and this embodiment will not be described in detail. Likewise, a power supply device 14, such as a battery, may be provided on the third support 65 for supplying power to the third drive means 61.

The biological rotating disc in the three embodiments can be used singly or in combination according to the needs so as to achieve the purpose of purifying sewage.

Example 4:

referring to fig. 7 to 9, the present embodiment provides a biological rotating disc, which includes all the technical features of any one of embodiments 1 to 3. Further, the disc of the bio-disc is different from the existing disc in that the disc of the bio-disc includes a skeleton 71 and a plurality of bio-film carriers 72, the plurality of bio-film carriers 72 are carried on the skeleton 71, and the bio-film carriers 72 are used for adhesion of microorganisms to form a bio-film. Referring to fig. 7, the bio-film carrier 72 includes a carrier core 7201 and a carrier coating 7202, the carrier core 7201 is made of a magnet or a magnetic conductive material for magnetizing a water film on the surface of the bio-film, the carrier coating 7202 is made of plastic or resin for coating the carrier core 7201, and the surface of the carrier coating 7202 has a pleated structure and a porous structure.

As an example, the skeleton 71 may be a steel skeleton, which has better strength, rigidity and structural stability. The surface of the steel skeleton can be further wrapped with a plastic layer or a resin layer so as to improve the corrosion resistance. And the plastic layer or the resin layer has more hydrophilicity and can be used for microorganism to adhere and grow to form a biological film. The magnet can be ferrite, rare earth magnet, alnico, iron-carbon-aluminum, etc., and the magnetic conductive material can be pure iron, low carbon steel, iron-silicon alloy, iron-aluminum alloy, nickel-iron alloy, iron-cobalt alloy, etc. The biofilm carrier 72 may be mounted on the steel skeleton by welding, adhesion, or the like.

When in use, the carrier inner core 7201 magnetizes the water film on the surface of the biological film, and the dissolved oxygen in the magnetized water film is greatly increased, so that microorganisms can perform full aerobic reaction, and the sewage treatment capacity is improved. And the magnetization of the water body can mineralize part of organic matters, improve the light absorption rate of the water and improve the solubility of inorganic salts, thereby being beneficial to the growth of algae and further improving the removal capability of N, P elements, heavy metal elements and small-particle organic pollutants. By coating the carrier coating 7202 made of plastic or resin on the surface of the carrier core 7201, the hydrophilicity of the biofilm carrier 72 can be improved, microorganism attachment growth can be facilitated, and the carrier core 7201 can be protected from sewage corrosion. The surface of the carrier coating 7202 has a pleated structure and a porous structure, which can increase the relative surface area of the biofilm carrier 72, thereby facilitating the increase of the adhesion of microorganisms, and also facilitating the increase of the adhesion of the biofilm, and reducing the possibility of the biofilm being peeled off by the inflow water.

Referring to fig. 8, as an example of an embodiment, the skeleton 71 includes an outer ring 7101 and an inner ring 7102, the inner ring 7102 is used for sleeving the rotating shaft, the outer ring 7101 and the inner ring 7102 are connected by a connecting rod 7103, a plurality of first magnets 73 are disposed on the outer ring 7101 and/or the inner ring 7102, a plurality of biofilm carriers 72 are disposed between the outer ring 7101 and the inner ring 7102, the plurality of biofilm carriers 72 are connected in series by a magnetic conductive wire 74 to form a mesh structure, and the plurality of biofilm carriers 72 are connected with the first magnets 73 by the magnetic conductive wire 74. For example, referring to fig. 9, the magnetic conductive wire 74 and the bio-film carrier 72 may be connected by a hanging buckle. Specifically, the biofilm carrier 72 may be provided with a through hole, and the magnetic conductive wire 74 passes through the through hole and then is wound around itself to fasten and fix.

When in use, the third disc slowly rotates, and the inflow water forms a plurality of small rotational flows under the longitudinal shearing of the skeleton outer ring 7101 and the biomembrane carrier 72 reticular structure, so that the contact mixing, adsorption degradation and microbial metabolism of the biomembrane and pollutants are greatly promoted.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that changes and substitutions are within the scope of the present invention.

Claims

1. The biological rotating disc is characterized by comprising a first driving device, a first buoyancy device and at least one first disc group, wherein the first disc group comprises at least one first disc; the first disc is used for microorganism adhesion; the first driving device is used for driving the first disc to rotate; the first buoyancy device is used for providing buoyancy to enable the first disc part to be immersed in sewage and the first disc part to be exposed to air;

the first disc comprises a framework and a plurality of biological film carriers, wherein the biological film carriers are carried on the framework and are used for adhesion of microorganisms to form biological films; the biological film carrier comprises a carrier inner core and a carrier coating, wherein the carrier inner core is made of a magnet or a magnetic conductive material and is used for magnetizing a water film on the surface of the biological film, the carrier coating is made of plastic or resin and is used for coating the carrier inner core, and the surface of the carrier coating is provided with a fold structure and a porous structure.

2. The biological rotating disc according to claim 1, wherein the first buoyancy device comprises at least two first buoys, the first buoys are arranged on two sides of the first disc group, and the first buoys and the first disc group are positioned at the same position and height; the first disc group comprises a plurality of first discs, the first discs are connected in a penetrating way through a first rotating shaft, so that the first disc group is in a cylindrical structure, and a space exists between two adjacent first discs; the first driving device drives the first disc to rotate by driving the first rotating shaft.

3. The biological rotating disc according to claim 2, wherein the number of the first disc groups is multiple, the multiple first disc groups are arranged side by side and in parallel, the first driving device drives one of the first disc groups to rotate, and two adjacent first disc groups are driven by friction or gears.

4. The biological rotating disc is characterized by comprising a second driving device, a second buoyancy device and at least one second disc group, wherein the second disc group comprises at least one second disc; the second disc is used for microorganism adhesion; the second driving device is used for driving the second disc to rotate; the second buoyancy device is used for providing buoyancy, so that the second disc is completely immersed in sewage and does not touch the bottom;

the second disc comprises a framework and a plurality of biological film carriers, the biological film carriers are carried on the framework, and the biological film carriers are used for adhesion of microorganisms to form biological films; the biological film carrier comprises a carrier inner core and a carrier coating, wherein the carrier inner core is made of a magnet or a magnetic conductive material and is used for magnetizing a water film on the surface of the biological film, the carrier coating is made of plastic or resin and is used for coating the carrier inner core, and the surface of the carrier coating is provided with a fold structure and a porous structure.

5. The biological rotating disc according to claim 4, wherein the second buoyancy device comprises at least two second buoys, the second buoys are arranged on two sides of the second disc group, and the second buoys are positioned at a higher level than the second disc group; the second disc group comprises a plurality of second discs, the second discs are connected in a penetrating way through a second rotating shaft, so that the second disc group is in a cylindrical structure, and a space exists between two adjacent second discs; the second driving device drives the second rotating shaft to drive the second disc to rotate.

6. The biological rotating disc according to claim 5, wherein the number of the second disc groups is multiple, the multiple second disc groups are arranged side by side and in parallel, the second driving device drives one of the second disc groups to rotate, and two adjacent second disc groups are driven by friction or gears.

7. The biological rotating disc is characterized by comprising a third driving device, a third buoyancy device, at least one group of third disc groups and at least one group of fourth disc groups, wherein the third disc groups comprise at least one third disc, and the fourth disc groups comprise at least one fourth disc; the third disc and the fourth disc are used for adhesion of microorganisms; the third driving device is used for driving the third disc and the fourth disc to rotate; the third buoyancy device is used for providing buoyancy, so that the third disc is partially immersed in sewage, is partially exposed to air, and the fourth disc is completely immersed in the sewage and does not touch the bottom;

the third disc and the fourth disc comprise a framework and a plurality of biological film carriers, the biological film carriers are carried on the framework, and the biological film carriers are used for attaching microorganisms to form biological films; the biological film carrier comprises a carrier inner core and a carrier coating, wherein the carrier inner core is made of a magnet or a magnetic conductive material and is used for magnetizing a water film on the surface of the biological film, the carrier coating is made of plastic or resin and is used for coating the carrier inner core, and the surface of the carrier coating is provided with a fold structure and a porous structure.

8. The biological rotor as recited in claim 7, wherein the buoyancy device includes at least two third pontoons disposed on either side of the third and fourth plate groups; the third disc group comprises a plurality of third discs, the plurality of third discs are connected in a penetrating way through a third rotating shaft, so that the third disc group is in a cylindrical structure, and a space exists between two adjacent third discs; the fourth disc group comprises a plurality of fourth discs, the fourth discs are connected in a penetrating way through a fourth rotating shaft, so that the fourth disc group is in a cylindrical structure, and a space exists between two adjacent fourth discs; the third driving device drives the third disc to rotate by driving the third rotating shaft, and drives the third disc to rotate by driving the fourth rotating shaft.

9. The biological growth disk of claim 8, wherein the number of the third disk group is two and the number of the fourth disk group is one; the two groups of third disc groups and one group of fourth disc groups are arranged in a space parallel and triangular mode, wherein the fourth disc groups are positioned below the two groups of third disc groups; the third buoyancy device comprises four groups of third pontoons, wherein two groups of third pontoons are respectively arranged at the left side and the right side of the two groups of third disc groups, and the other two groups of third pontoons are respectively arranged at the left side and the right side of the fourth disc group.

10. The biological turntable of claim 9, wherein the third driving device is configured to drive one of the third disc groups to rotate, and the third buoyancy device is configured to position the third driving device above the water surface; the third disk group directly driven by the third driving device is in friction or gear transmission with the other third disk group, and the third disk group directly driven by the third driving device is in friction or gear transmission with the fourth disk group.

11. The biological rotating disc according to any one of claims 1 to 10, wherein the skeleton comprises an outer ring and an inner ring, the inner ring is used for sleeving the rotating shaft, the outer ring and the inner ring are connected through a connecting rod, a plurality of first magnets are arranged on the outer ring and/or the inner ring, a plurality of biological membrane carriers are arranged between the outer ring and the inner ring, the biological membrane carriers are connected in series through magnetic wires to form a net structure, and the biological membrane carriers are connected with the first magnets through the magnetic wires.