CN217051778U - Reducing disc biological rotating disc processing device - Google Patents

Abstract

The utility model discloses a reducing disc rotating biological disk processing apparatus, including handling the pond, anaerobism carousel mechanism, facultative carousel mechanism and good oxygen carousel mechanism, anaerobism carousel mechanism, set gradually in the processing pond around facultative carousel mechanism and good oxygen carousel mechanism, the end of handling the pond is equipped with out the mill weir, anaerobism carousel mechanism top and play mill weir looks parallel and level, facultative carousel mechanism and good oxygen carousel mechanism highly all are higher than out the mill weir, and good oxygen carousel mechanism highly be higher than facultative carousel mechanism's height. By arranging the anaerobic turntable mechanism, the facultative turntable mechanism and the aerobic turntable mechanism with different heights, the immersion degree of each process area to the turntable is respectively controlled, and the anaerobic treatment area, the anoxic treatment area and the aerobic treatment area are divided in the treatment tank, so that the hydrolysis effect of the anaerobic treatment area on sewage and the denitrification effect of the anoxic treatment area are enhanced.

Description

Reducing disc biological rotating disc processing device

Technical Field

The utility model relates to a sewage treatment field especially relates to a reducing disc biological rotating disc processing apparatus.

Background

The purification mechanism of the biological rotating disc is basically the same as that of the biological filter, and the pollutant removal capacity mainly depends on a biological film which grows and grows on a rotating disc filler carrier. Anaerobic, facultative and aerobic biofilms are attached to the rotating disc from inside to outside. When the turntable rotates, and when a certain part of the surface of the turntable is immersed in sewage, the biological membrane on the turntable adsorbs organic matters in the sewage; when the disk leaves the liquid surface and is exposed to the air, the biological film on the disk absorbs oxygen from the air to oxidize organic matters. Through the process, the organic matters in the sewage in the oxidation reaction tank are reduced, and the sewage is purified. The biological film on the rotating disc also goes through the processes of reproduction, growth, aging and shedding, and the shed biological film can be removed in a secondary sedimentation tank. The biological rotating disk system not only effectively removes organic pollutants, but also has the functions of denitrification and dephosphorization.

The existing biological rotating disc can only form anaerobic, anoxic and aerobic facultative environment in the treatment tank, and the environment is single and has no differentiation; specific functions of strengthening anaerobic hydrolysis, denitrification reaction, oxidative decomposition and the like in a targeted manner based on the water quality characteristics of the sewage cannot be realized. In addition, the traditional rotating disc does not have the function of strengthening the falling of the aged biological membrane according to the difference of the metabolism periods of different types of microorganisms.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a reducing disc biological rotating disc processing device to solve one or more technical problems that exist among the above-mentioned background art.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a reducing disc rotating biological disk processing apparatus, is including handling pond, anaerobism carousel mechanism, facultative carousel mechanism and good oxygen carousel mechanism, anaerobism carousel mechanism facultative carousel mechanism with good oxygen carousel mechanism sets gradually around the mechanism is in the processing pond, the end of handling the pond is equipped with out the mill weir, anaerobism carousel mechanism top with go out mill weir looks parallel and level, facultative carousel mechanism with good oxygen carousel mechanism highly all be higher than go out the mill weir, just good oxygen carousel mechanism highly be higher than facultative carousel mechanism's height.

Preferably, the anaerobic turntable mechanism comprises a plurality of first biological turntables, the facultative turntable mechanism comprises a plurality of second biological turntables, the aerobic turntable mechanism comprises a plurality of third biological turntables, the outer diameter of the third biological turntables is greater than that of the second biological turntables, and the outer diameter of the second biological turntables is greater than that of the first biological turntables.

Preferably, the ratio of the outer diameters of the first rotating biological disk, the second rotating biological disk and the third rotating biological disk is 1.5: 2.5: 4.

preferably, still include actuating mechanism, actuating mechanism establishes one side of handling the pond, actuating mechanism includes drive motor and transmission shaft, the one end of transmission shaft with drive motor's output is connected, the other end setting of transmission shaft is in one side of handling the pond, anaerobism carousel mechanism facultative carousel mechanism with good oxygen carousel mechanism respectively with the transmission shaft transmission cooperation.

Preferably, anaerobism carousel mechanism still includes mutual parallel arrangement's first anaerobism pivot, second anaerobism pivot and third anaerobism pivot, transmission shaft, first anaerobism pivot the second anaerobism pivot and through the belt transmission cooperation between the third anaerobism pivot, it is a plurality of first biological carousel evenly set up in around respectively in first anaerobism pivot the second anaerobism pivot with in the third anaerobism pivot, set up from beginning to end leave first clearance between the first biological carousel, control the one end of the first biological carousel of adjacent setting and establish in the first clearance.

Preferably, facultative rotary table mechanism still includes first facultative rotary shaft and the facultative rotary shaft of mutual parallel arrangement, the transmission shaft first facultative rotary shaft reaches through the belt transmission cooperation between the facultative rotary shaft of second, it is a plurality of second biological rotating disc respectively around evenly set up in first facultative rotary shaft with on the second facultative rotary shaft, the front and back sets up leave the second clearance between the second biological rotating disc, the one end of controlling the adjacent second biological rotating disc that sets up is established in the second clearance.

Preferably, the aerobic rotating disc mechanism further comprises an aerobic rotating shaft, the transmission shaft is in transmission fit with the aerobic rotating shaft through a belt, and the third biological rotating discs are respectively and uniformly arranged on the aerobic facultative rotating shaft from front to back.

Preferably, actuating mechanism still includes a plurality of input gear, a plurality of output gear and a plurality of driving belt, and is a plurality of the input gear cover is established on the transmission shaft, it is a plurality of output gear overlaps respectively to be established in first anaerobism pivot, first facultative rotating shaft and the good oxygen pivot, input gear with pass through between the output gear driving belt cooperation.

Preferably, still include silt clearance mechanism, silt clearance mechanism includes a plurality of suction pipes, dredge pump and sedimentation tank, and is a plurality of the one end of suction pipe sets up one by one respectively anaerobism carousel mechanism facultative carousel mechanism and the bottom of good oxygen carousel mechanism, it is a plurality of the other end of suction pipe all with the suction end intercommunication of dredge pump, the dredge pump the mud discharging end with the sedimentation tank intercommunication.

Preferably, still include inlet tube and outlet pipe, the inlet tube is established the one end in processing pond, the height of play weir is higher than the inlet tube, the outlet pipe is established the other end in processing pond, the one end of outlet pipe with play weir intercommunication.

The beneficial effects of the utility model are that: the utility model discloses a set up not anaerobism carousel mechanism of co-altitude, facultative carousel mechanism and good oxygen carousel mechanism, come each process area territory of control respectively to the submergence degree of carousel, realize dividing into anaerobism processing area, oxygen deficiency processing area and good oxygen processing area in the treatment tank to the anaerobism processing area is to sewage hydrolysis, and the denitrification in oxygen deficiency processing area has been reinforceed.

Drawings

The accompanying drawings are used for further explaining the present invention, but the content in the accompanying drawings does not constitute any limitation to the present invention.

Fig. 1 is a schematic overall structure diagram of one embodiment of the present invention;

fig. 2 is a schematic top view of one embodiment of the present invention;

fig. 3 is a schematic structural diagram of a sludge cleaning mechanism according to one embodiment of the present invention.

Wherein: the device comprises a treatment tank 1, an anaerobic turntable mechanism 2, a facultative turntable mechanism 3, an aerobic turntable mechanism 4, a water outlet weir 11, a first biological turntable 21, a second biological turntable 31, a third biological turntable 41, a driving mechanism 5, a transmission motor 51, a transmission shaft 52, a first anaerobic rotating shaft 221, a second anaerobic rotating shaft 222, a third anaerobic rotating shaft 223, a first gap 224, a first facultative rotating shaft 321, a second facultative rotating shaft 322, a second gap 323, an aerobic rotating shaft 42, an input gear 53, an output gear 54, a transmission belt 55, a sludge cleaning mechanism 6, a sludge suction pipe 61, a sludge pump 62, a sedimentation tank 63, a water inlet pipe 12, a water outlet pipe 111 and a sewage liquid level 7.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

Referring to fig. 1, the rotating biological disk processing apparatus with reducing disks in this embodiment includes a processing tank 1, an anaerobic rotating disk mechanism 2, a facultative rotating disk mechanism 3, and an aerobic rotating disk mechanism 4, the anaerobic rotating disk mechanism 2, the facultative rotating disk mechanism 3, and the aerobic rotating disk mechanism 4 are sequentially disposed in the processing tank 1, an effluent weir 11 is disposed at the end of the processing tank 1, the top of the anaerobic rotating disk mechanism 2 is flush with the effluent weir 11, the facultative rotating disk mechanism 3 and the aerobic rotating disk mechanism 4 are both higher than the effluent weir 11, and the aerobic rotating disk mechanism 4 is higher than the facultative rotating disk mechanism 3.

In the embodiment, by arranging the anaerobic turntable mechanism 2, the facultative turntable mechanism 3 and the aerobic turntable mechanism 4 with different heights and arranging the effluent weir 11 with a certain height, sewage enters the treatment tank 1 and then sequentially passes through the anaerobic turntable mechanism 2, the facultative turntable mechanism 3 and the aerobic turntable mechanism 4 and finally overflows out of the treatment tank 1 from the effluent weir 11, so that the immersion degree of each process area on the turntable can be respectively controlled, and the anaerobic treatment area, the anoxic treatment area and the aerobic treatment area are divided into the treatment tank 1, thereby strengthening the hydrolysis effect of the anaerobic treatment area on the sewage and the denitrification effect of the anoxic treatment area. Therefore, the embodiment can purposefully strengthen a certain function aiming at the characteristics of the sewage, for example, the organic matters in the sewage are complex and are difficult to degrade, so that the anaerobic treatment capacity can be strengthened, and the anaerobic hydrolysis level can be improved; if the total ammonia nitrogen in the sewage is higher, the anoxic treatment capability and the denitrification level can be enhanced; when the concentration of the organic matter is higher, the aerobic treatment capability is strengthened, and the oxidative decomposition level is strengthened. The problem of can't strengthen a certain function to the characteristic of sewage among the prior art is solved.

Preferably, referring to fig. 2, the anaerobic turntable mechanism 2 comprises a plurality of first biological rotating discs 21, the facultative turntable mechanism 3 comprises a plurality of second biological rotating discs 31, the aerobic turntable mechanism 4 comprises a plurality of third biological rotating discs 41, the outer diameter of the third biological rotating discs 41 is larger than that of the second biological rotating discs 31, and the outer diameter of the second biological rotating discs 31 is larger than that of the first biological rotating discs 21. The top of the anaerobic turntable mechanism 2 is flush with the effluent weir 11, namely the first biological turntable 21 is completely immersed in the sewage, so that anaerobic conditions are created for the first biological turntable 21, growth and propagation of anaerobic microorganisms are facilitated, anaerobic hydrolysis capacity is enhanced, the outer diameter of the first biological turntable 21 is small, the edge linear velocity is relatively low, slow metabolism of the anaerobic microorganisms is compensated, and the sewage can be treated by the thickness of a biological film on the first biological turntable 21; the facultative rotating disc mechanism 3 is higher than the effluent weir 11 and lower than the aerobic rotating disc mechanism 4, so that 70-80% of the area of the second biological rotating disc 31 can be immersed by sewage, the dissolved oxygen brought into the sewage by the second biological rotating disc 31 is less, facultative conditions are created, the growth and the propagation of facultative microorganisms are facilitated, the shearing force between the water flow and the disc surface is between the first biological rotating disc 21 and the third biological rotating disc 41, and the attachment of a biological membrane is also facilitated; the height of the aerobic turntable mechanism 4 is higher than that of the anaerobic turntable mechanism 2 and the facultative turntable mechanism 3, so that 40-50% of the area of the third biological turntable 41 can be immersed by sewage, more dissolved oxygen is brought into the sewage by the third biological turntable 41, an aerobic dominant biological environment is created, the growth and propagation of aerobic microorganisms are facilitated, the outer diameter of the third biological turntable 41 is larger, the edge linear velocity is relatively high, the metabolic velocity of the aerobic microorganisms is relatively high, and the aged biological membrane can be ensured to be peeled off in time; the first biological rotating disk 21, the second biological rotating disk 31 and the third biological rotating disk 41 can rotate and have the function of stirring and flocculating flow on sewage. The biological membranes adopted on the first biological rotating disk 21, the second biological rotating disk 31 and the third biological rotating disk 41 are consistent and are facultative biological membranes.

Further, the ratio of the outer diameters of the first biological rotating disk 21, the second biological rotating disk 31 and the third biological rotating disk 41 is set to be 1.5: 2.5: 4, so that the ratio of the areas of the first biological rotating disk 21, the second biological rotating disk 31 and the third biological rotating disk 41 submerged by the sewage is 100%: 70% -80%: and 40% -50% of the sewage is treated in the treatment tank 1 to form an anaerobic treatment area, an anoxic treatment area and an aerobic treatment area in front and back respectively, so that the sewage treatment effect is enhanced.

Preferably, the anaerobic rotary table device further comprises a driving mechanism 5, the driving mechanism 5 is arranged on one side of the treatment tank 1, the driving mechanism 5 comprises a transmission motor 51 and a transmission shaft 52, one end of the transmission shaft 52 is connected with the output end of the transmission motor 51, the other end of the transmission shaft 52 is arranged on one side of the treatment tank 1, and the anaerobic rotary table mechanism 2, the facultative rotary table mechanism 3 and the aerobic rotary table mechanism 4 are respectively in transmission fit with the transmission shaft 52. Therefore, the driving motor 51 and the transmission shaft 52 are arranged, so that the anaerobic turntable mechanism 2, the facultative turntable mechanism 3 and the aerobic turntable mechanism 4 can be driven to rotate at the same time, the structure is simple, the overhaul is convenient, the embodiment can be transformed in the traditional biological turntable treatment tank 1, no civil engineering cost is added, and the construction cost is saved.

Preferably, the anaerobic rotary table mechanism 2 further comprises a first anaerobic rotary shaft 221, a second anaerobic rotary shaft 222 and a third anaerobic rotary shaft 223 which are arranged in parallel, the transmission shaft 52, the first anaerobic rotary shaft 221, the second anaerobic rotary shaft 222 and the third anaerobic rotary shaft 223 are matched through belt transmission, the plurality of first biological rotary tables 21 are respectively and uniformly arranged on the first anaerobic rotary shaft 221, the second anaerobic rotary shaft 222 and the third anaerobic rotary shaft 223 in a front-back manner, a first gap 224 is reserved between the first biological rotary tables 21 arranged in the front-back manner, and one end of each first biological rotary table 21 arranged adjacently in the left-right manner is arranged in the first gap 224. Because the outer diameter of the first rotating biological disk 21 is smaller than that of the second rotating biological disk 31 and the third rotating biological disk 41, in order to ensure that sewage can sufficiently pass through the first rotating biological disk 21 for anaerobic treatment, the anaerobic rotating disk mechanism 2 of the present embodiment is provided with the first anaerobic rotating shaft 221, the second anaerobic rotating shaft 222 and the third anaerobic rotating shaft 223 which are parallel to each other, so that the width of the anaerobic rotating disk mechanism 2 in the treatment tank 1 is equal to the width of the facultative rotating disk mechanism 3 and the width of the aerobic rotating disk mechanism 4 in the treatment tank 1, so that the sewage can certainly contact with the first rotating biological disk 21 when passing through the anaerobic rotating disk mechanism 2, the contact area between the sewage and the first rotating biological disk 21 is increased, and the sewage can be sufficiently anaerobically treated by the first rotating biological disk 21. In addition, a first gap 224 is left between the first biological rotating discs 21 arranged in the front and back, and one end of the first biological rotating disc 21 arranged adjacently in the left and right is arranged in the first gap 224, so that the occupied space of the first biological rotating disc 21 is saved.

Preferably, the facultative disc mechanism 3 further includes a first facultative rotating shaft 321 and a second facultative rotating shaft 322 which are arranged in parallel, the transmission shaft 52, the first facultative rotating shaft 321 and the second facultative rotating shaft 322 are in transmission fit through a belt, no additional driving equipment is needed, the plurality of second biological rotating discs 31 are respectively and uniformly arranged on the first facultative rotating shaft 321 and the second facultative rotating shaft 322 front and back, a second gap 323 is reserved between the second biological rotating discs 31 arranged front and back, and one end of the second biological rotating disc 31 arranged left and right adjacently is arranged in the second gap 323. Since the outer diameter of the second rotating biological disk 31 is smaller than that of the third rotating biological disk 41, in order to ensure that sewage can be sufficiently treated by the second rotating biological disk 31 in a facultative manner, the facultative rotating disk mechanism 3 of the embodiment is provided with the first facultative rotating shaft 321 and the second facultative rotating shaft 322 which are parallel to each other, so that the width of the facultative rotating disk mechanism 3 in the treatment tank 1 is equal to the width of the anaerobic rotating disk mechanism 2 and the width of the aerobic rotating disk mechanism 4 in the treatment tank 1, the sewage can be contacted with the second rotating biological disk 31 when passing through the facultative rotating disk mechanism 3, the contact area between the sewage and the second rotating biological disk 31 is increased, and the sewage can be sufficiently treated by the second rotating biological disk 31 in a facultative manner. In addition, a second gap 323 is left between the second rotating biological material trays 31 disposed in the front and rear, and one end of the second rotating biological material tray 31 disposed adjacent to each other in the left and right direction is disposed in the second gap 323, thereby saving the space occupied by the second rotating biological material tray 31.

Preferably, the aerobic rotating disc mechanism 4 further comprises an aerobic rotating shaft 42, the transmission shaft 52 is in transmission fit with the aerobic rotating shaft 42 through a belt, and the plurality of third biological rotating discs 41 are respectively and uniformly arranged on the aerobic facultative rotating shaft in front and back. Therefore, the transmission shaft 52 drives the aerobic rotating shaft 42 to rotate through belt transmission, so that the third biological rotating disc 41 can rotate, aged biological films on the third biological rotating disc 41 are ensured to be timely peeled off, and the sewage is stirred and flocculated.

Preferably, the driving mechanism 5 further includes a plurality of input gears 53, a plurality of output gears 54 and a plurality of transmission belts 55, the plurality of input gears 53 are sleeved on the transmission shaft 52, the plurality of output gears 54 are respectively sleeved on the first anaerobic rotating shaft 221, the first facultative rotating shaft 321 and the aerobic rotating shaft 42, and the input gears 53 and the output gears 54 are in transmission fit through the transmission belts 55. Therefore, the belt transmission matching between the transmission shaft 52 and the first anaerobic rotating shaft 221, the first facultative rotating shaft 321 and the aerobic rotating shaft 42 is realized by respectively arranging the input gear 53 and the output gear 54 on the transmission shaft 52 and the first anaerobic rotating shaft 221, the first facultative rotating shaft 321 and the aerobic rotating shaft 42. Because the requirement on the transmission ratio is lower in the embodiment, the belt transmission is adopted, the structure is simple, the maintenance cost is reduced, and the transmission is stable and noiseless.

Preferably, this embodiment still includes silt clearance mechanism 6, refer to fig. 3, and silt clearance mechanism 6 includes a plurality of suction pipes 61, dredge pump 62 and sedimentation tank 63, and the one end of a plurality of suction pipes 61 sets up respectively one by one in the bottom of anaerobism carousel mechanism 2, facultative turntable mechanism 3 and aerobic turntable mechanism 4, and the other end of a plurality of suction pipes 61 all communicates with the suction end of dredge pump 62, and the dredge end and the sedimentation tank 63 of dredge pump 62 communicate. Therefore, the sludge cleaning mechanism 6 is arranged, so that the sludge and the fallen biological films at the bottoms of the anaerobic turntable mechanism 2, the facultative turntable mechanism 3 and the aerobic turntable mechanism 4 can be cleaned in time respectively, and the flowing speed of sewage in the treatment tank 1 is ensured.

Preferably, the present embodiment further comprises a water inlet pipe 12 and a water outlet pipe 111, wherein the water inlet pipe 12 is arranged at one end of the treatment tank 1, the height of the effluent weir 11 is higher than that of the water inlet pipe 12, the water outlet pipe 111 is arranged at the other end of the treatment tank 1, and one end of the water outlet pipe 111 is communicated with the effluent weir 11. The effluent weir 11 is arranged to be higher than the water inlet pipe 12, so that sewage enters the treatment tank 1 from the water inlet pipe 12 and then fully overflows into the effluent weir 11 through the anaerobic turntable mechanism 2, the facultative turntable mechanism 3 and the aerobic turntable mechanism 4, and finally the sewage level 7 is discharged out of the treatment tank 1 through the water outlet pipe 111, and the process of sewage treatment can be completed.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and is not to be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive step, and these embodiments are all intended to fall within the scope of the present invention.

Claims (10)

1. The utility model provides a reducing disc biological rotating disc processing apparatus, its characterized in that, is including handling pond, anaerobism carousel mechanism, facultative carousel mechanism and good oxygen carousel mechanism, anaerobism carousel mechanism facultative carousel mechanism with good oxygen carousel mechanism sets gradually around the mechanism in the processing pond, the end of handling the pond is equipped with out the mill weir, anaerobism carousel mechanism top with go out mill weir looks parallel and level, facultative carousel mechanism with good oxygen carousel mechanism highly all is higher than go out the mill weir, just good oxygen carousel mechanism highly be higher than facultative carousel mechanism's height.

2. The apparatus as claimed in claim 1, wherein the anaerobic turntable mechanism comprises a plurality of first biological turntables, the facultative turntable mechanism comprises a plurality of second biological turntables, the aerobic turntable mechanism comprises a plurality of third biological turntables, the outer diameter of the third biological turntables is larger than that of the second biological turntables, and the outer diameter of the second biological turntables is larger than that of the first biological turntables.

3. The processing apparatus of claim 2, wherein the ratio of the outer diameters of the first rotating biological disk, the second rotating biological disk and the third rotating biological disk is 1.5: 2.5: 4.

4. the apparatus as claimed in claim 2 or 3, further comprising a driving mechanism, wherein the driving mechanism is disposed at one side of the processing tank, the driving mechanism comprises a transmission motor and a transmission shaft, one end of the transmission shaft is connected to an output end of the transmission motor, the other end of the transmission shaft is disposed at one side of the processing tank, and the anaerobic turntable mechanism, the facultative turntable mechanism and the aerobic turntable mechanism are respectively in transmission fit with the transmission shaft.

5. The different-diameter disc biological rotating disc processing device according to claim 4, wherein the anaerobic rotating disc mechanism further comprises a first anaerobic rotating shaft, a second anaerobic rotating shaft and a third anaerobic rotating shaft which are arranged in parallel, the transmission shaft, the first anaerobic rotating shaft, the second anaerobic rotating shaft and the third anaerobic rotating shaft are matched through belt transmission, a plurality of first biological rotating discs are uniformly arranged around the first biological rotating discs respectively in the first anaerobic rotating shaft, the second anaerobic rotating shaft and the third anaerobic rotating shaft, a first gap is reserved between the first biological rotating discs which are arranged around the first biological rotating discs, and one end of the first biological rotating discs which are adjacently arranged at left and right sides is arranged in the first gap.

6. The apparatus as claimed in claim 5, wherein the facultative disc mechanism further comprises a first facultative rotating shaft and a second facultative rotating shaft disposed in parallel, the transmission shaft, the first facultative rotating shaft and the second facultative rotating shaft are engaged with each other by belt transmission, the second rotating discs are respectively disposed on the first facultative rotating shaft and the second facultative rotating shaft uniformly in the front and back direction, a second gap is left between the second rotating discs disposed in the front and back direction, and one end of the second rotating disc disposed adjacently in the left and right direction is disposed in the second gap.

7. The different-diameter disc biological rotating disc treatment device according to claim 6, wherein the aerobic rotating disc mechanism further comprises an aerobic rotating shaft, the transmission shaft is in transmission fit with the aerobic rotating shaft through a belt, and the third biological rotating discs are respectively and uniformly arranged on the aerobic facultative rotating shaft in front and back directions.

8. The apparatus of claim 7, wherein the driving mechanism further comprises a plurality of input gears, a plurality of output gears and a plurality of transmission belts, the plurality of input gears are sleeved on the transmission shaft, the plurality of output gears are respectively sleeved on the first anaerobic rotating shaft, the first facultative rotating shaft and the aerobic rotating shaft, and the input gears and the output gears are in transmission fit through the transmission belts.

9. The rotating biological disk processing apparatus with reduced disks according to claim 1, further comprising a sludge cleaning mechanism, wherein the sludge cleaning mechanism comprises a plurality of sludge suction pipes, a sludge discharge pump and a sedimentation tank, one end of each of the plurality of sludge suction pipes is respectively disposed at the bottom of the anaerobic rotating disk mechanism, the facultative rotating disk mechanism and the aerobic rotating disk mechanism, the other end of each of the plurality of sludge suction pipes is communicated with the suction end of the sludge discharge pump, and the sludge discharge end of the sludge discharge pump is communicated with the sedimentation tank.

10. The different-diameter disc biological rotating disc processing device according to claim 1, further comprising a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is arranged at one end of the processing pool, the height of the water outlet weir is higher than that of the water inlet pipe, the water outlet pipe is arranged at the other end of the processing pool, and one end of the water outlet pipe is communicated with the water outlet weir.

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