CN108892340B - Double-rotation vertical tubificidae sludge reduction reactor and method thereof - Google Patents
Double-rotation vertical tubificidae sludge reduction reactor and method thereof Download PDFInfo
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- CN108892340B CN108892340B CN201810724503.1A CN201810724503A CN108892340B CN 108892340 B CN108892340 B CN 108892340B CN 201810724503 A CN201810724503 A CN 201810724503A CN 108892340 B CN108892340 B CN 108892340B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/20—Sludge processing
Abstract
The invention discloses a double-rotation vertical tubificidae sludge reduction reactor and a method thereof, and belongs to the field of environmental protection equipment. The reduction reactor comprises a sludge pretreatment device and a sludge reduction device; the sludge pretreatment device is positioned at the front end of the sludge reduction device and forms a sludge reduction reactor together with the sludge reduction device; wherein the sludge reducer comprises a vertical rotatable tubificidae predator, a liftable aeration system and a filtering reflux system. The invention is based on the principles of adhering tubificidae to the filler and feeding the sludge, utilizes the circulation of 'predation-flushing-sedimentation-adhesion-rotation' in the reaction zone, and is matched with a sludge pretreatment device, a liftable aeration system and a filtering reflux system, thereby realizing the reduction of sludge particles, enhancing the predation and digestion efficiency of tubificidae, realizing the timely separation of sludge, earthworm cast and earthworm body, and improving the sludge reduction efficiency.
Description
Technical Field
The invention belongs to the field of environmental protection equipment, and particularly relates to a double-rotation vertical tubificidae sludge reduction reactor and a method thereof.
Background
With the increase of sewage treatment capacity and treatment rate, a large amount of excess sludge is generated, which is an environmental problem to be solved urgently. For economic, efficient and environment-friendly reasons, the treatment of excess sludge by tubificidae has become an important method. The tubificidae sludge reduction process is mainly divided into an in-situ sludge reduction process and a two-stage sludge reduction process, and the tubificidae sludge reduction reactor can also be divided into an in-situ sludge reduction reactor and a two-stage sludge reduction reactor. The efficiency of the tubificidae in capturing sludge is different in different reactor environments, so that research and development of the tubificidae sludge reduction reactor are also necessary.
During the growth and metabolism of the ingested sludge, the tubificidae can produce a lot of excrement, and the inactivated earthworm body which is aged, dead and not suitable for the environment exists at the same time, and after the two substances exist in the reactor for a long time, nutritive salts such as N, P and the like can be released, so that a plurality of substances for inhibiting the tubificidae are produced, the sludge reduction environment and the tubificidae activity of the reactor are influenced, and the sludge reduction efficiency is reduced. For example, the tubificidae ingests the sludge, the phenomenon of enriching heavy metals in the sludge exists, the heavy metals are easy to transfer into the earthworm cast and the earthworm body, and the timely separation of the earthworm cast and the inactivated earthworm body is necessary for avoiding the heavy metals from returning to the sludge and the sewage again. The novel tubificidae sludge reduction reactor is combined with technologies such as oxidation ditch and MBR, so that a good sludge reduction effect can be achieved, but the novel tubificidae sludge reduction reactor is less in research on timely separation and sludge pretreatment of sludge, earthworm cast and deactivated earthworm bodies. The existing tubificidae decrement reactor has the problems that the predation efficiency is low, and sludge, earthworm cast, earthworm body and the like cannot be separated in time, so that the reactor needs to be further perfected.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a double-rotation vertical tubificidae sludge reduction reactor and a method thereof.
The specific technical scheme adopted by the invention is as follows:
the double-rotation vertical tubificidae sludge reduction reactor comprises a sludge pretreatment device and a sludge reduction device; the sludge pretreatment device is positioned at the front end of the sludge reduction device and forms a sludge reduction reactor together with the sludge reduction device;
wherein the sludge reducer comprises a vertical rotatable tubificidae predator, a liftable aeration system and a filtering reflux system; the sludge reducer shell is cylindrical, the vertical rotatable tubificidae predator is arranged inside the shell and consists of two vertical modules and two horizontal modules, the outer wall of each vertical module is surrounded by a porous filler plate embedded in the outer frame to form a bottomless and non-cover hollow cuboid, and the outer wall of each horizontal module is surrounded by a porous filler plate embedded in the outer frame to form two hollow cuboids with opposite side surfaces communicated; the vertical modules and the horizontal modules are connected by a central double rotator, the two vertical modules are vertically arranged on the upper side and the lower side of the double rotator, and the two horizontal modules are horizontally arranged on the left side and the right side of the double rotator to form a crisscross shape; the top of the vertical module above is also provided with a mud discharging port, and the mud discharging port is opposite to the inner cavity of the vertical module; the porous filler plates of the two vertical modules are provided with a spacing space, the outer frames are connected into a whole, and the spacing space between the two vertical modules is matched and filled through the two module connecting plates, so that the inner cavities of the two vertical modules are continuous and uninterrupted; a space is also reserved between the porous filler plates of the two horizontal modules and the module connecting plate, but the outer frames of the two horizontal modules are connected into a whole; the openings of one side of the two horizontal modules, which face the double rotator, are respectively provided with a side plugging plate for plugging; the right side surface of the horizontal module on the right side of the double rotator and the bottom surface of the vertical module below the double rotator are plugged by a pore plate, and a row of unidirectional air inlets are formed in the pore plate;
The double rotator comprises a rotating shaft and a rotating handle, wherein the rotating shaft is horizontally paved along the intersection line of the plane where the vertical module and the horizontal module are positioned, two ends of the rotating shaft are fixed on the shell of the sludge reducer through bearings, and one end of the rotating shaft extends out of the shell of the sludge reducer and is connected with the rotating handle; the rotary shaft is coaxially sleeved with a front inner gear ring and a rear inner gear ring, and side plugging plates at the side parts of the two horizontal modules are respectively fixed at the periphery of the rear inner gear ring through connecting rods penetrating through the module connecting plates, so that the two side plugging plates, the two module connecting plates and the rear inner gear ring form a whole capable of synchronously rotating; the two vertical modules and the outer frames of the two horizontal modules are connected with the front inner gear ring, so that the two vertical modules, the two horizontal modules and the front inner gear ring form a whole capable of synchronously rotating; the two vertical modules and the two horizontal modules are equal in distance from the rotating shaft to the side face of one side of the double rotator; two intermediate gears are coaxially fixed on the rotating shaft between the front inner gear ring and the rear inner gear ring; when the rotating shaft axially moves, the intermediate gear close to the front inner gear ring can be embedded into the front inner gear ring to form gear matching transmission, and the intermediate gear close to the rear inner gear ring can be embedded into the rear inner gear ring to form gear matching transmission;
The sludge pretreatment device is used for crushing sludge, and a sludge outlet of the sludge pretreatment device is connected to a sludge discharge port at the top of the vertical module through a sludge conveying pipe;
the lifting aeration system is positioned right below the vertical module and can adjust the height up and down, and is used for aerating the bottom surface and two sides of the vertical module; the filtering reflux system is arranged at the bottom of the sludge reducer and is used for separating and refluxing the solid and the liquid at the bottom of the sludge reducer.
Preferably, the sludge pretreatment device comprises a stirring pulverizer and an ultrasonic pulverizing device, wherein stirring blades of the stirring pulverizer extend into the shell of the sludge pretreatment device and are used for stirring sludge; the ultrasonic wave reducing mechanism is arranged on the inner wall of the sludge pretreatment device and is used for applying ultrasonic wave cavitation to the sludge.
Preferably, the lifting aeration system comprises an air inlet pipe, and a row of conical aeration pipes and two rows of tubular aeration pipes which are communicated with the air inlet pipe; a row of conical aeration pipes are arranged below the bottom surface of the vertical module, and the conical aeration ports of the conical aeration pipes just face to the unidirectional air inlets on the pore plate on the bottom surface of the vertical module; the two calandria aeration pipes are respectively arranged at two sides of the vertical module; the shell of the sludge reducer is provided with a vertical lifting hole, the whole lifting aeration system is connected with a lifting handle arranged outside the sludge reducer through a connecting rod, and the connecting rod penetrates through the lifting hole and can move up and down in the lifting hole.
Preferably, the filtering reflux system comprises a sewage reflux pipe and a sludge reflux pipe; the bottom of the sludge reducer is provided with a sludge collecting hopper, a sludge water pipeline connected with a sludge water outlet of the sludge collecting hopper is divided into two branches, and the first branch sequentially passes through a first electromagnetic valve, a earthworm dung filter and a first conveying pump and then flows back to the bottom of the sludge reducer through a sewage return pipe; the second branch sequentially passes through a second electromagnetic valve, a earthworm filter and a second delivery pump and then flows back to a sludge discharge port at the top of the vertical module through a sludge return pipe; the bottom of the earthworm cast filter and the bottom of the earthworm body filter are respectively provided with a first switch and a second switch for controlling pollution discharge.
Preferably, the porous filler plate is made of thermoplastic elastomer TPE, and the inner wall and the outer wall of the porous filler plate have roughness, the thickness is 3 mm, and the mesh number is 45.
Preferably, the unidirectional air inlet is covered with a cover plate, the size of the cover plate is larger than the aperture below, and the cover plate is hinged on the pore plate and can only be opened to the inner cavity of the module.
Preferably, the two vertical modules are filled with sludge for culturing tubificidae.
Preferably, when the lifting aeration system is positioned at the lowest position of the height, the conical aeration port of the conical aeration pipe is separated from the unidirectional air inlet hole, and the two aeration ports are kept at a certain distance; when the lifting aeration system is positioned at the highest position, the conical aeration opening of the conical aeration pipe stretches into the unidirectional air inlet hole.
Preferably, the earthworm cast filter is provided with a filter membrane with the mesh number of 70, and the earthworm body filter is provided with a filter membrane with the mesh number of 20; the mixed liquid in the two filters flows in from the bottom of the filter, passes through the filter membrane from bottom to top in the filter, and is discharged from above.
Another object of the present invention is to provide a sludge reduction treatment method using the reduction reactor according to any one of the above aspects, characterized by comprising the steps of:
firstly, enabling sludge to enter a sludge pretreatment device, and fully crushing sludge particles under the combined action of stirring crushing mechanical force generated by a stirring crusher and hydraulic shearing force caused by ultrasonic cavitation of an ultrasonic crushing device; the sludge after pretreatment is discharged into the vertical module through a sludge conveying pipe, and the sludge is settled along the rough inner wall of the porous filler plate and fills the vertical module; after two vertical modules are filled with sludge to form a sludge chamber, the vertical modules are inoculated and densely cultivated with tubificidae, and after the tubificidae grows stably, the decrement reactor formally starts to work;
then, starting a liftable aeration system to start aeration, enabling tubificidae to be attached to filler plates at the left side and the right side of the vertical module, enabling the head to pass through the filler plates and drill into a mud phase to prey on the mud, enabling the tail to be in a water phase for respiration and excretion, enabling excrement to downwards precipitate along the surfaces of the filler plates, and finally precipitating to the bottom of a mud reducer; when the excrement is deposited to a certain amount, the second electromagnetic valve is closed, the first electromagnetic valve and the first delivery pump are opened, the sewage return pipe is kept smooth, the mixed solution flows in from the bottom of the earthworm cast filter, the earthworm cast is filtered through a filter membrane with the mesh number of 70 from bottom to top in the filter, the filtrate is discharged from the top of the filter, and the filtrate is discharged into the sludge reducer again through the sewage return pipe; after the earthworm cast is filtered, the first electromagnetic valve is closed, the first switch at the bottom of the earthworm cast filter is opened, water flow in the sewage backflow pipe is utilized to flow in from the top of the earthworm cast filter, and the filter passes through the filter membrane from top to bottom to perform a back flushing function, so that the earthworm cast in the earthworm cast filter can be discharged from the bottom of the filter;
Taking 4 hours as a reaction period of the sludge reducer, after each reaction period, on the premise of filtering out earthworm cast at the bottom of the sludge reducer, enabling a liftable aeration system to start aeration under the condition that a conical aeration port of a conical aeration pipe is separated from the unidirectional air inlet, enabling tubificidae to be disturbed to drill into a mud phase of a vertical module, pulling up a lifting handle of the aeration system at the moment, enabling the conical aeration port of the conical aeration pipe to be inserted into the vertical module through the unidirectional air inlet at the bottom of the vertical module, further increasing the aeration amount, enabling earthworm bodies and sludge to be flushed out together, suspended in a water phase, stopping aeration, enabling tubificidae and sludge to be settled on the upper surface of a filler plate of the horizontal module, enabling the tubificidae to be attached to a filler, and enabling activated tubificidae to penetrate through the filler plate to drill into the mud phase; re-draining sludge into the vertical module in the time of waiting for the reattachment of the tubificidae; after the tubificidae reattachment is completed, a middle gear close to the rear inner gear ring is embedded into the rear inner gear ring to form gear matching transmission by pushing the rotating handle, and the rotating handle is rotated clockwise to drive the two side plugging plates and the two module connecting plates to rotate by 90 degrees, so that the horizontal modules are communicated together through the two module connecting plates to form a whole, and the two side plugging plates plug the two sides of the vertical module; then, the rotary handle is pulled to enable the intermediate gear close to the front inner gear ring to be embedded into the front inner gear ring to form gear matching transmission, the rotary handle is rotated clockwise to drive the whole vertical rotatable tubificidae predator to rotate, and position exchange of the vertical module and the horizontal module is completed, so that tubificidae predates sludge on the new vertical module;
After the positions of the vertical module and the horizontal module are exchanged for one time, the earthworm body at the bottom of the reactor is required to be filtered, the first electromagnetic valve is closed, the second electromagnetic valve is opened, the smoothness of the sludge return pipe is kept, the mixed liquid flows in from the bottom of the earthworm body filter, the earthworm body is filtered through a filter membrane with the mesh number of 20 from bottom to top in the filter, the filtrate with sludge is discharged from the top of the filter, and the filtrate with sludge is discharged into the vertical module again through the sludge return pipe from a sludge discharge port at the top of the vertical module, so that sludge return is realized; after the earthworm body is filtered, the second electromagnetic valve is closed, the second switch at the bottom of the earthworm body filter is opened, water flow in the sludge backflow pipe is utilized to enter from the top of the earthworm body filter, the filtered earthworm body passes through the filter membrane from top to bottom in the filter to play a role in back flushing, and the filtered earthworm body can be discharged from the bottom of the earthworm body filter.
The reactor is based on the principles of adhering water earthworms to adhering fillers and feeding sludge, utilizes the circulation of 'predation-flushing-sedimentation-adhering-rotation' in a reaction zone, and is matched with a sludge pretreatment device, a liftable aeration system and a filtering reflux system, so that the reduction of sludge particles is realized, the predation and digestion efficiency of the water earthworms is enhanced, the timely separation of sludge, manure and sludge is realized, a good sludge reduction environment is created, and the sludge reduction efficiency is improved.
The sludge reduction index, the discharged sewage index and the separation efficiency of the earthworm cast and the inactivated earthworm body are as follows:
1. the feeding rate of the tubificidae sludge: 0.258 TSS/d.g
2. Sludge reduction rate: excess sludge reduction rate of urban sewage treatment is 55%
3. Sludge index SVI of the reactor mix: 60
4. MLVSS/MLSS for stabilizing sludge: 0.35
5. Earthworm cast separation efficiency: 80 to 90 percent of
6. Deactivated earthworm separation efficiency: 40% -60%.
Drawings
FIG. 1 is a schematic diagram of the main structure of a double-rotation vertical tubificidae sludge reduction reactor;
FIG. 2 is a schematic diagram of the internal structure of a double-rotation vertical tubificidae sludge reduction reactor;
FIG. 3 is a schematic view of a dual rotator at one viewing angle;
FIG. 4 is a schematic view of a dual rotator at another view angle;
FIG. 5 is a first alternate state of the vertical rotatable tubificidae predator;
FIG. 6 is a second alternate state of the vertical rotatable tubificidae predator;
FIG. 7 is a schematic diagram of a structure of a liftable aeration system;
FIG. 8 is a schematic view of the arrangement of a liftable aeration system below a vertical module;
FIG. 9 is a schematic of a vertical or horizontal module;
reference numerals in the drawings: the sludge pretreatment device comprises a sludge pretreatment device (1), a sludge reducer (2), a vertical rotatable tubificidae predator (3), a lifting aeration system (4), a filtration reflux system (5), an elastic porous TPE filler plate (6), a vertical module (7), a horizontal module (8), a double rotator (9), a rear gear (10), a middle gear (11), a front gear (12), a rotating shaft (13), a rotating handle (14), a conical aerator pipe (15), a tubular aerator pipe (16), a lifting handle (17), lifting holes (18), a first switch (19), a first electromagnetic valve (20), a second electromagnetic valve (21), a earthworm dung filter (22), a earthworm body filter (23), a second switch (24), a sewage reflux pipe (25), a sludge reflux pipe (26), a stirring pulverizer (27), an ultrasonic wave reduction device (28), a sludge discharge port (29), a sludge conveying pipe (30), a first conveying pump (31), a second conveying pump (32), a module connecting plate (901), a side sealing plate (902) and a connecting rod (903).
Detailed Description
The invention is further illustrated and described below with reference to the drawings and detailed description. The technical features of the embodiments of the invention can be combined correspondingly on the premise of no mutual conflict.
As shown in fig. 1, in a preferred embodiment, sludge particles can be crushed, earthworm cast and deactivated earthworm are separated from a sludge reduction system, and the intermittent strong-aeration double-rotation vertical tubificidae sludge reduction reactor mainly comprises a sludge pretreatment device 1 and a sludge reduction device 2. The sludge pretreatment device 1 is independently arranged at the front end of the sludge reduction device 2 and forms a sludge reduction reactor together with the sludge reduction device 2. Wherein the sludge reducer 2 comprises a vertical rotatable tubificidae predator 3, a liftable aeration system 4 and a filtering reflux system 5. The sludge pretreatment device 1 is used for crushing sludge, and a sludge outlet of the sludge pretreatment device 1 is connected to a sludge discharge port 29 at the top of the vertical module 7 through a sludge conveying pipe 30. The sludge discharge opening 29 is an open-bottomed means for discharging and filling the sludge into the interior of the vertical module 7.
As shown in fig. 2, the outer casing of the sludge reducer 2 is a cylindrical cuboid, and a sludge collecting hopper with a certain gradient is arranged at the bottom. The vertical rotatable tubificidae predator 3 is arranged inside the housing and consists of two identical vertical modules 7 and two identical horizontal modules 8. The vertical module 7 and the horizontal module 8 are formed by embedding a porous filler plate 6 inside the outer metal frame, the porous filler plate 6 is made of thermoplastic elastomer TPE, and the inner wall and the outer wall of the filler plate have certain roughness, and the structure is shown in figure 9. The packing plate has a large frontal area, and may be used as a main reaction site, or the side surface of the module may be embedded with the packing plate if necessary. Wherein the outer wall of the vertical module 7 is enclosed into a bottomless and capless hollow cuboid by the porous packing plate 6 embedded in the outer frame, and the outer wall of the horizontal module 8 is enclosed into two hollow cuboids with through opposite side surfaces by the porous packing plate 6 embedded in the outer frame. The vertical modules 7 and the horizontal modules 8 are connected by a central double rotator 9, the two vertical modules 7 are vertically arranged on the upper side and the lower side of the double rotator 9, and the two horizontal modules 8 are horizontally arranged on the left side and the right side of the double rotator 9 to form a 90-degree orthogonal crisscross shape. The mud discharging opening 29 is arranged at a certain height position at the top of the vertical module 7 above, and the mud discharging opening 29 is opposite to the inner cavity of the vertical module 7. The vertical and horizontal modules 7, 8 are not fixedly connected with the double rotator 9, but are movably connected in a variable form. In particular, there is a space between the porous filler plates 6 of the two vertical modules 7 but the outer rims are integrally connected, which is also understood as a state in which both ends of one entire outer rim are filled with the porous filler plates 6, but the middle position is hollow. The space between the two vertical modules 7 is filled by two module connecting plates 901, and the two module connecting plates 901 are respectively positioned on the same plane with the two side surfaces of the vertical modules 7, so that the inner cavities of the two vertical modules 7 are continuous and uninterrupted. But the module connecting plate 901 and the vertical module 7 can be displaced through rotation and are not directly fixed, namely the module connecting plate 901 can be separated from the vertical module 7. The porous filler plates 6 of the two horizontal modules 8 are also spaced from the module connecting plates 901, but the outer rims of the two horizontal modules 8 are integrally connected, which can be understood as a state that the porous filler plates 6 are filled at both ends of one whole outer rim, but the middle position is hollow. Two horizontal modules 8 are respectively provided with a side plugging plate 902 for plugging on the opening of one side facing the double rotator 9. The right side surface of the horizontal module 8 on the right side of the double rotator 9 and the bottom surface of the vertical module 7 below the double rotator 9 are plugged by pore plates, rows of unidirectional air inlets are formed in the pore plates, and each pore plate is provided with 10 air inlets with the radius of 5 mm. The unidirectional air inlet hole can only be used for allowing air to enter the module, but sludge in the module cannot be discharged from the hole at will, so that the unidirectional air inlet hole is covered with the cover plate, the size of the cover plate is larger than the aperture of the lower part, and the cover plate is hinged on the surface of the pore plate, which faces the inner cavity of the module, and can only be opened to the inner cavity of the module, so that the unidirectional air inlet function is realized. During operation, the two vertical modules 7 are filled with sludge for the cultivation of tubificidae. And the left side surface of the horizontal module 8 on the left side of the double rotator 9 and the top surface of the vertical module 7 above the double rotator 9 are respectively provided with an openable cover plate for injecting sludge into the openable cover plates.
As shown in fig. 3 and 4, the double rotator 9 is a device for achieving the positional exchange of the vertical module 7 and the horizontal module 8, and the double rotator 9 includes a rotation shaft 13 and a rotation handle 14. The central planes of the vertical module 7 and the horizontal module 8 are respectively provided with a junction line, the rotating shaft 13 is horizontally laid along the junction line, two ends of the rotating shaft 13 are fixed on the shell of the sludge reducer 2 through bearings, and one end of the rotating shaft extends out of the shell of the sludge reducer 2 and is connected with the rotating handle 14. The longitudinal section of the whole vertical rotatable tubificidae predator 3 is centrosymmetric with the position of the rotation shaft 13, and can rotate around the rotation shaft 13. The rotating shaft 13 is coaxially sleeved with a front inner gear ring 12 and a rear inner gear ring 10, and tooth grooves are formed in the inner sides of the ring bodies of the front inner gear ring 12 and the rear inner gear ring 10. The two side plugging plates 902 at the side parts of the two horizontal modules 8 are connected with a plurality of connecting rods 903, and the connecting rods 903 penetrate through the module connecting plates 901 and are fixed at the periphery side of the rear inner gear ring 10, so that the two side plugging plates 902, the two module connecting plates 901 and the rear inner gear ring 10 form a whole capable of synchronously rotating, namely a gray part in fig. 5. When the rear inner gear ring 10 rotates, the two side plugging plates 902 and the two module connecting plates 901 can be driven to synchronously rotate. The two vertical modules 7 and the two horizontal modules 8 have certain thickness, so that the joint positions of the outer frames of the two vertical modules 7 and the two horizontal modules 8, namely the centers of the cross, form a square frame, two sides of the modules are respectively provided with a square frame, the centers of the two square frames are respectively provided with a bearing, and the bearing sleeves are arranged on the rotating shafts 13 to support the weight of all the vertical modules 7 and the horizontal modules 8. One square frame is fixedly connected with the peripheral side of the front inner gear ring 12, so that the two vertical modules 7, the two horizontal modules 8 and the front inner gear ring 12 form a whole capable of synchronously rotating. It should be noted that, in order to satisfy the subsequent cooperation with the intermediate gear 11, the front ring gear 12 and the rear ring gear 10 are only sleeved outside the rotating shaft 13, but are not in contact with the shaft, and the distance between the inner rings of the two and the rotating shaft 13 is always kept unchanged. Therefore, the front inner gear ring 12 and the rear inner gear ring 10 can ensure that the gear ring and the shaft do not generate radial displacement by fixing a bearing tightly sleeved on the rotating shaft 13 on one side of the gear ring, and can ensure that the gear ring can rotate freely around the shaft. Of course, other structures may be employed to achieve this function.
In this device, the angles of the two side closure plates 902 and the two module connection plates 901 need to be adjusted by means of the double rotator 9 so that they are connected to the two vertical modules 7 and the two horizontal modules 8, respectively, at different angles. Therefore, the distance of the two vertical modules 7 and the two horizontal modules 8 from the rotation axis 13 toward the side of the double rotator 9 should be kept equal. In addition, the angle of the two side closure plates 902 and the two module connection plates 901, and the angle of the two vertical modules 7 and the two horizontal modules 8 are sequentially adjusted, and the relative adjustment is achieved by the two intermediate gears 11. The two intermediate gears 11 are coaxially fixed to the rotary shaft 13 between the front ring gear 12 and the rear ring gear 10 to rotate in synchronization with the shaft. And the intermediate gear 11 can be just clamped into the gaps in the front inner gear ring 12 and the rear inner gear ring 10, when the rotating shaft 13 moves axially, the intermediate gear 11 close to the front inner gear ring 12 can be embedded into the front inner gear ring 12 to form gear fit transmission, and the intermediate gear 11 close to the rear inner gear ring 10 can be embedded into the rear inner gear ring 10 to form gear fit transmission. The intermediate gear 11 can be adjusted to be matched with which inner gear ring by pulling the rotating shaft 13 through the rotating handle 14. When the rotary shaft 13 moves backwards, the intermediate gear 11 is engaged with the rear inner gear ring 10, the rotary handle 14 is rotated clockwise, the rotary shaft 13 drives the gray part of the packing plates to rotate, the horizontal modules 8 are communicated together to form a whole, the vertical modules 7 are separated up and down and blocked by the two side blocking plates 902, and the position close to the horizontal modules 8 is hollow, so that the state shown in fig. 6 is formed. And then the rotating shaft 13 is moved forward, the intermediate gear 11 is engaged with the front inner gear ring 12, and when the rotating handle 14 is continuously rotated clockwise, the whole vertical rotatable tubificidae predator 3 is driven to rotate, so that the positions of the vertical module 7 and the horizontal module 8 can be interchanged.
In this embodiment, the sludge pretreatment apparatus 1 includes a stirring pulverizer 27 and an ultrasonic pulverizing device 28, the stirring pulverizer 27 is a stirrer having stirring blades, and the stirring blades of the stirring pulverizer 27 extend into the interior of the casing of the sludge pretreatment apparatus 1 for stirring the sludge. The ultrasonic wave reducing devices 28 are installed on both side inner walls of the sludge pretreatment device 1 for applying ultrasonic wave cavitation to the sludge. After the sludge enters the sludge pretreatment device 1, the sludge is subjected to stirring and crushing mechanical force generated by the high-speed stirring and crushing device 27 and hydraulic shearing force caused by ultrasonic cavitation of the ultrasonic wave crushing device 28, and the combined action of the stirring and crushing mechanical force and the hydraulic shearing force can deepen the crushing degree of sludge flocs and cells, so that sludge particles are fully crushed, the predation efficiency of the subsequent tubificidae predation of the sludge is improved, and the reduction rate of the sludge is improved.
The liftable aeration system 4 is located right below the vertical module and can adjust the height up and down for aerating the bottom surface and both sides of the vertical module 7. In this embodiment, the structure of the liftable aeration system 4 is shown in fig. 7, and the liftable aeration system comprises an air inlet pipe, a row of conical aeration pipes 15 and two rows of tubular aeration pipes 16 which are communicated with the air inlet pipe, wherein the bottoms of the three rows of aeration pipes are level, and the spacing between the three rows of aeration pipes is 50 mm. A row of conical aeration pipes 15 are arranged below the bottom surface of the vertical module 7, and the conical aeration ports of the conical aeration pipes 15 just face to the unidirectional air inlets on the pore plate on the bottom surface of the vertical module 7; two calandria aeration pipes 16 are respectively arranged at two sides of the vertical module 7 for aeration to two sides, and gas enters the upper space through the gap between the horizontal module and the vertical module. The liftable aeration system 4 is positioned at a position 20 mm below the vertical rotatable tubificidae predator 3. As shown in fig. 8, a lifting hole 18 with a height of 15 mm is formed in the outer shell of the sludge reducer 2, and the lifting aeration system 4 is integrally connected with a lifting handle 17 arranged outside the sludge reducer 2 through a connecting rod, wherein the connecting rod penetrates through the lifting hole 18 and can move up and down in the lifting hole 18. The size of the liftable aeration system 4 needs to satisfy: when the liftable aeration system 4 is positioned at the lowest height position, the conical aeration port of the conical aeration pipe 15 is separated from the unidirectional air inlet hole, and the two are kept at a certain distance, so that the air cannot completely enter the unidirectional air inlet hole; when the liftable aeration system 4 is positioned at the highest position, the conical aeration port of the conical aeration pipe 15 extends into the unidirectional air inlet hole, and gas completely enters the unidirectional air inlet hole to realize strong aeration. It should be noted that the connection between the lifting hole 18 and the lifting handle 17 requires a leak-proof measure. When the lifting handle 17 is pulled upwards in use, the middle conical aeration pipe 15 is lifted, the conical aeration port is inserted into the vertical module 7 through the aeration hole at the bottom of the vertical module 7, and the sludge and the tubificidae in the vertical module 7 can be flushed out together by strong aeration at the moment, so that the sludge and the tubificidae are in a suspension state.
The filtering and refluxing system 5 is arranged at the bottom of the sludge reducer 2, and the main function of the filtering and refluxing system 5 is to filter earthworm cast generated by tubificidae and filter tubificidae which is dead or poor in activity and then reflux muddy water. In this embodiment, the filter return system 5 comprises a sewage return line 25 and a sludge return line 26. The bottom of the sludge reducer 2 is provided with a sludge collecting hopper, the inclination of the sludge collecting hopper is about 0.3, and the sludge reducing device is beneficial to depositing particulate matters. The muddy water pipeline of the muddy water outlet of connecting the mud collecting hopper is divided into two branches, the first branch flows back to the bottom of the sludge reducing device 2 through the sewage return pipe 25 after passing through the first electromagnetic valve 20, the earthworm cast filter 22 and the first conveying pump 31 in sequence, the first electromagnetic valve 20 can control the first branch to be disconnected, the earthworm cast filter 22 is internally provided with a filter membrane with the mesh number of 70, mixed liquor is introduced from the bottom of the earthworm cast filter 22, and flows back to the lower part of the sludge reducing device 2 from the upper part of the earthworm cast filter 22 after passing through the filter membrane, and the first conveying pump 31 is used for providing conveying power. The second branch sequentially passes through the second electromagnetic valve 21, the earthworm filter 23 and the second delivery pump 32 and then flows back to the sludge discharge port 29 at the top of the vertical module 7 through the sludge return pipe 26. The second electromagnetic valve 21 can control the opening and closing of the second branch, a filter membrane with the mesh number of 20 is arranged in the earthworm filter 23, and the mixed solution is introduced from the bottom of the earthworm filter 23, passes through the filter membrane, and then is discharged from the upper part of the earthworm filter 23 to flow back into the sludge discharge port 29. During the back flow, when the first solenoid valve 20 and the second solenoid valve 21 are closed, the sewage back flow pipe 25 and the sludge back flow pipe 26 have a certain water head height, so that back flushing of the filter membrane can be performed. The bottoms of the earthworm dung filter 22 and the earthworm body filter 23 are respectively provided with a first switch 19 and a second switch 24 for controlling the opening and closing of the drain outlet, and back flushing can be realized by opening the first switch 19 and the second switch 24. Of course, the first transfer pump 31 and the second transfer pump 32 may be two-way pumps, and the back flushing force may be further increased.
The sludge reduction treatment method based on the reduction reactor comprises the following steps:
firstly, the sludge enters the sludge pretreatment device 1, the sludge is subjected to stirring and crushing mechanical force generated by the stirring and crushing device 27 and hydraulic shearing force caused by ultrasonic cavitation of the ultrasonic wave crushing device 28, and the combined action of the stirring and crushing mechanical force and the hydraulic shearing force can deepen the crushing degree of sludge flocs and cells, so that sludge particles are fully crushed, the predation efficiency of the follow-up tubificidae predation of the sludge is improved, and the reduction rate of the sludge is improved. The sludge after pretreatment is discharged into the vertical module 7 through the sludge conveying pipe 30, and the sludge slowly subsides along the rough inner wall of the porous filler plate 6 until the vertical module 7 is filled; after two vertical modules 7 are filled with sludge to form a sludge chamber, the vertical modules 7 are inoculated and densely cultivated with tubificidae, and after the tubificidae grows stably, the decrement reactor can formally start working.
Starting the liftable aeration system 4 to start aeration, enabling tubificidae to be attached to the filler plates at the left side and the right side of the vertical module 7, enabling the head to pass through the filler plates and drill into the mud phase to prey on the mud, enabling the tail to be in the water phase for respiration and excretion, enabling the excrement to reach the lower part from the upper part to the hollow middle part along the surface of the filler plates, and finally settling to the bottom of the mud reducer 2; when the excrement is deposited to a certain amount, the second electromagnetic valve 21 is automatically closed, the first electromagnetic valve 20 is automatically opened, at the moment, the sewage return pipe 25 is smooth, the earthworm cast filter 22 is arranged in the pipeline, the mixed solution flows in from one side of the bottom of the filter, the filter passes through a filter membrane with the mesh number of 70 from bottom to top in the filter, the earthworm cast is filtered, the filtrate is discharged from the top of the filter, and the filtrate is discharged into the sludge reducer 2 again through the sewage return pipe 25; after the earthworm cast is filtered, the first electromagnetic valve 20 beside the earthworm cast filter 22 is closed, the first switch 19 at the bottom of the earthworm cast filter 22 is opened, high water flow flows in from the top of the earthworm cast filter 22 through the sewage return pipe 25, and the earthworm cast in the earthworm cast filter 22 can be discharged from the bottom of the filter through the filter membrane from top to bottom in the filter to perform a back flushing function.
In the whole reaction process of the reactor, 4 hours is taken as a reaction period of the sludge reducer 2, after one period of reaction, on the premise of filtering excrement such as earthworm dung at the bottom of the sludge reducer 2, the liftable aeration system 4 starts strong aeration under the condition that a conical aeration port of the conical aeration pipe 15 is separated from the one-way air inlet hole, the tubificidae is disturbed to drill into a mud phase of the vertical module, at the moment, the lifting handle 17 of the aeration system is pulled upwards, the conical aeration port of the conical aeration pipe 15 is inserted into the vertical module 7 through the one-way air inlet hole at the bottom of the vertical module 7, the aeration is further increased, the earthworm body and the sludge are flushed out together and suspended in a water phase, then aeration is stopped, the tubificidae and the sludge slowly sink onto the upper surface of a filler plate of the horizontal module 8, the activated tubificidae is adhered to the filler plate, and the activated tubificidae penetrates into the mud phase of the filler plate; re-draining sludge into the vertical module in the time of waiting for the reattachment of the tubificidae; after the tubificidae is reattached, pushing the rotary handle 14 forwards to enable the rotary shaft 13 to move backwards, embedding the intermediate gear 11 close to the rear inner gear ring 10 into the rear inner gear ring 10 to form gear matching transmission, continuously rotating the rotary handle 14 clockwise to drive the two side plugging plates 902 and the two module connecting plates 901 to rotate 90 degrees, enabling the horizontal module 8 to be communicated together through the two module connecting plates 901 to form a whole, separating the vertical module 7 into two blocks vertically, and enabling the position close to the horizontal module 8 to be hollow, wherein the two side plugging plates 902 plug the two sides of the vertical module 7 facing the double rotator 9; pulling the rotary handle 14 backwards to enable the rotary shaft 13 to move forwards, embedding the intermediate gear 11 close to the front inner gear ring 12 into the front inner gear ring 12 to form gear matching transmission, rotating the rotary handle 14 clockwise to drive the whole vertical rotatable tubificidae predator 3 to rotate, and finishing the position exchange of the vertical module 7 and the horizontal module 8, wherein the original vertical module 7 becomes a new horizontal module 8, and the original horizontal module 8 becomes a new vertical module 7; the tubificidae continues to predate the sludge on the new vertical module 7.
During the process of the tubificidae and sludge settling onto the upper surface of the filler plate of the horizontal template 8 and the rotation of the vertical rotatable tubificidae predator 3, the poorly active, dead tubificidae and partially lost sludge fall to the bottom of the sludge reducer 2. Therefore, after the vertical module 7 and the horizontal module 8 are exchanged in position once, earthworm body filtering work is needed, the first electromagnetic valve 20 is automatically closed, the second electromagnetic valve 21 is automatically opened, the sludge return pipe 26 is smooth, the earthworm body filter 23 is arranged in the pipeline, mixed liquid flows in from one side of the bottom of the filter, the filter membrane with the mesh number of 20 passes through the earthworm body from bottom to top in the filter, the earthworm body is filtered, the filtrate with sludge is discharged from the top of the filter, and the filtrate is discharged into the vertical module 7 again from the sludge discharge port 29 at the top of the vertical module 7 through the sludge return pipe 26, so that sludge return is realized. And finally, after the earthworm body is filtered, a second electromagnetic valve 21 beside the earthworm body filter 23 is closed, a switch 24 at the bottom of the earthworm body filter 23 is opened, high water flow enters from the top of the earthworm body filter 23 through a sludge return pipe 26, passes through a filter membrane from top to bottom in the filter, plays a role in back flushing, and filtered earthworm bodies can be discharged from the bottom of the earthworm body filter 23.
Examples
In this embodiment, the specific structure of the dual rotation vertical tubificidae sludge reduction reactor is as described above, and will not be described again.
1. The specific dimensions and parameters of each cell are as follows: the sludge pretreatment vessel was made of stainless steel and the vessel size was 20X 20cm. The sludge reducer is an open cuboid container with reflux at the bottom, and is made of organic glass, the size is 50 multiplied by 22 multiplied by 70cm, the effective height is 60cm, and the effective volume is 60L. The modules are all formed by embedding elastic porous TPE filler plates with the thickness of 3 mm into a metal frame, the thickness is 3 mm, and the mesh number is 45. The overall frame size formed by the connection of two vertical modules is 15 x 200 x 480mm, and the individual horizontal modules are 200 x 15mm. After the vertical module is discharged into sludge, the water earthworms are inoculated and densely cultured on the vertical module; the bottom of the sludge reducer is provided with a slope with the inclination of about 0.3.
2. The sewage treated by the reactor is from mixed liquid of a biochemical pool, and the concentration of the mixed sludge liquid is 2000-4000mg/L.
3. The sludge reduction treatment method based on the reduction reactor is as described above.
4. Sludge reduction effect:
the feeding rate of the tubificidae sludge can reach 0.258 TSS/d.g, and the reduction rate of the residual sludge in urban sewage treatment is 55%.
5. The earthworm cast separation effect:
the separation period of the earthworm cast is half an hour, the frequency is high, and the separation effect can reach 80% -90%.
6. Earthworm body separation effect:
the separation period of the earthworm bodies is 4 hours, and the separation efficiency of the deactivated earthworm bodies is 40-60%.
The above embodiment is only a preferred embodiment of the present invention, but it is not intended to limit the present invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the equivalent substitution or equivalent transformation are within the protection scope of the invention.
Claims (10)
1. The double-rotation vertical tubificidae sludge reduction reactor is characterized by comprising a sludge pretreatment device (1) and a sludge reduction device (2); the sludge pretreatment device (1) is positioned at the front end of the sludge reduction device (2) and forms a sludge reduction reactor together with the sludge reduction device (2);
wherein the sludge reducer (2) comprises a vertical rotatable tubificidae predator (3), a liftable aeration system (4) and a filtering reflux system (5); the shell of the sludge reducer (2) is cylindrical, the vertical rotatable tubificidae predator (3) is arranged inside the shell and consists of two vertical modules (7) and two horizontal modules (8), the outer wall of each vertical module (7) is surrounded by a porous filler plate (6) embedded in the outer frame to form a bottomless and non-covered hollow cuboid, and the outer wall of each horizontal module (8) is surrounded by a porous filler plate (6) embedded in the outer frame to form two hollow cuboids with opposite side surfaces communicated; the vertical modules (7) and the horizontal modules (8) are connected through a central double rotator (9), the two vertical modules (7) are vertically arranged on the upper side and the lower side of the double rotator (9), and the two horizontal modules (8) are horizontally arranged on the left side and the right side of the double rotator (9) to form a crisscross shape; the top of the vertical module (7) above is also provided with a mud discharging opening (29), and the mud discharging opening (29) is opposite to the inner cavity of the vertical module (7); an interval space exists between the porous filler plates (6) of the two vertical modules (7) but the outer frames are connected into a whole, and the interval space between the two vertical modules (7) is matched and filled through the two module connecting plates (901), so that the inner cavities of the two vertical modules (7) are continuous and uninterrupted; a spacing space is also reserved between the porous filler plates (6) of the two horizontal modules (8) and the module connecting plates (901), and the outer frames of the two horizontal modules (8) are connected into a whole; two horizontal modules (8) are provided with a side plugging plate (902) for plugging towards one side opening of the double rotator (9) respectively; the right side surface of a horizontal module (8) on the right side of the double rotator (9) and the bottom surface of a vertical module (7) below the double rotator (9) are plugged by a pore plate, and a row of unidirectional air inlets are formed in the pore plate;
The double rotator (9) comprises a rotating shaft (13) and a rotating handle (14), wherein the rotating shaft (13) is horizontally paved along the intersection line of the planes of the vertical module (7) and the horizontal module (8), two ends of the rotating shaft (13) are fixed on the shell of the sludge reducer (2) through bearings, and one end of the rotating shaft extends out of the shell of the sludge reducer (2) and is connected with the rotating handle (14); a front inner gear ring (12) and a rear inner gear ring (10) are coaxially sleeved on the rotating shaft (13), and side blocking plates (902) at the side parts of the two horizontal modules (8) are respectively fixed at the periphery of the rear inner gear ring (10) through connecting rods (903) penetrating through module connecting plates (901), so that the two side blocking plates (902) and the two module connecting plates (901) and the rear inner gear ring (10) form a whole capable of synchronously rotating; the outer frames of the two vertical modules (7) and the two horizontal modules (8) are connected with the front inner gear ring (12), so that the two vertical modules (7) and the two horizontal modules (8) and the front inner gear ring (12) form a whole capable of synchronously rotating; the distance from the side surface of the two vertical modules (7) facing the double rotator (9) to the rotating shaft (13) is equal to the distance from the side surface of the two horizontal modules (8) facing the double rotator; two intermediate gears (11) are coaxially fixed on a rotating shaft (13) between the front inner gear ring (12) and the rear inner gear ring (10); when the rotating shaft (13) axially moves, the intermediate gear (11) close to the front inner gear ring (12) can be embedded into the front inner gear ring (12) to form gear fit transmission, and the intermediate gear (11) close to the rear inner gear ring (10) can be embedded into the rear inner gear ring (10) to form gear fit transmission;
The sludge pretreatment device (1) is used for crushing sludge, and a sludge outlet of the sludge pretreatment device (1) is connected to a sludge outlet (29) at the top of the vertical module (7) through a sludge conveying pipe (30);
the lifting aeration system (4) is positioned right below the vertical module and can adjust the height up and down, and is used for aerating the bottom surface and two sides of the vertical module (7); the filtering reflux system (5) is arranged at the bottom of the sludge reducer (2) and is used for separating and refluxing the solid and the liquid at the bottom of the sludge reducer (2).
2. The double-rotation vertical tubificidae sludge reduction reactor as claimed in claim 1, wherein the sludge pretreatment device (1) comprises a stirring pulverizer (27) and an ultrasonic pulverizing device (28), and stirring blades of the stirring pulverizer (27) extend into the interior of the shell of the sludge pretreatment device (1) and are used for stirring sludge; the ultrasonic wave reducing mechanism (28) is arranged on the inner wall of the sludge pretreatment device (1) and is used for applying ultrasonic wave cavitation to the sludge.
3. The double-rotation vertical tubificidae sludge reduction reactor as claimed in claim 1, wherein the liftable aeration system (4) comprises an air inlet pipe, and a row of conical aeration pipes (15) and two rows of tubular aeration pipes (16) which are communicated with the air inlet pipe; a row of conical aeration pipes (15) are arranged below the bottom surface of the vertical module (7), and the conical aeration ports of the conical aeration pipes (15) just face to the unidirectional air inlets on the pore plate on the bottom surface of the vertical module (7); two row of tubular aeration pipes (16) are respectively arranged at two sides of the vertical module (7); a vertical lifting hole (18) is formed in the shell of the sludge reducer (2), the lifting aeration system (4) is integrally connected with a lifting handle (17) arranged outside the sludge reducer (2) through a connecting rod, and the connecting rod penetrates through the lifting hole (18) and can move up and down in the lifting hole (18).
4. A dual rotation vertical tubificidae sludge reduction reactor as claimed in claim 1 wherein the filtration return system (5) comprises a sewage return conduit (25) and a sludge return conduit (26); the bottom of the sludge reducer (2) is provided with a sludge collecting hopper, a sludge water pipeline connected with a sludge water outlet of the sludge collecting hopper is divided into two branches, and the first branch sequentially passes through a first electromagnetic valve (20), a earthworm cast filter (22) and a first conveying pump (31) and then flows back to the bottom of the sludge reducer (2) through a sewage return pipe (25); the second branch sequentially passes through a second electromagnetic valve (21), a earthworm filter (23) and a second delivery pump (32) and then flows back to a sludge outlet (29) at the top of the vertical module (7) through a sludge return pipe (26); the bottom of the earthworm cast filter (22) and the bottom of the earthworm body filter (23) are respectively provided with a first switch (19) and a second switch (24) for controlling pollution discharge.
5. The double-rotation vertical tubificidae sludge reduction reactor as claimed in claim 1, wherein the porous filler plate (6) is made of thermoplastic elastomer TPE, and the inner and outer walls of the filler plate have roughness, the thickness is 3 mm, and the mesh number is 45.
6. The double-rotation vertical tubificidae sludge reduction reactor according to claim 1, wherein the one-way air inlet is covered with a cover plate, the size of the cover plate is larger than the aperture below, and the cover plate is hinged on the pore plate and can only be opened to the inner cavity of the module.
7. A dual rotation vertical tubificidae sludge reduction reactor as claimed in claim 1 wherein the two vertical modules (7) are filled with sludge for culturing tubificidae.
8. The double-rotation vertical tubificidae sludge reduction reactor according to claim 1, wherein when the liftable aeration system (4) is positioned at the lowest height position, the conical aeration port of the conical aeration pipe (15) is separated from the unidirectional air inlet hole, and the conical aeration port and the unidirectional air inlet hole are kept at a certain distance; when the lifting aeration system (4) is positioned at the highest position, the conical aeration port of the conical aeration pipe (15) extends into the unidirectional air inlet hole.
9. The double-rotation vertical tubificidae sludge reduction reactor as claimed in claim 4, wherein the earthworm cast filter (22) is provided with a filter membrane with 70 meshes, and the earthworm filter (23) is provided with a filter membrane with 20 meshes; the mixed liquid in the two filters flows in from the bottom of the filter, passes through the filter membrane from bottom to top in the filter, and is discharged from above.
10. A sludge reduction treatment method using the reduction reactor according to any one of claims 1 to 9, characterized by comprising the steps of:
firstly, the sludge enters a sludge pretreatment device (1), and sludge particles are fully crushed under the combined action of stirring crushing mechanical force generated by a stirring crusher (27) and hydraulic shearing force caused by ultrasonic cavitation of an ultrasonic crushing device (28); the sludge after pretreatment is discharged into the vertical module (7) through a sludge conveying pipe (30), and the sludge is settled along the rough inner wall of the porous filler plate (6) and fills the vertical module (7); after two vertical modules (7) are filled with sludge to form a sludge chamber, the vertical modules (7) are inoculated and densely cultivated with tubificidae, and after the tubificidae grows stably, the decrement reactor formally starts to work;
Then, starting a liftable aeration system (4) to start aeration, enabling tubificidae to adhere to the filler plates at the left side and the right side of the vertical module (7), enabling the head to penetrate through the filler plates and drill into a mud phase to prey on sludge, enabling the tail to be in a water phase to breathe and excrete, enabling excreta to downwards precipitate along the surface of the filler plates, and finally precipitating to the bottom of the sludge reducer (2); when the excrement is deposited to a certain amount, the second electromagnetic valve (21) is closed, the first electromagnetic valve (20) and the first conveying pump (31) are opened, the sewage return pipe (25) is kept smooth, the mixed solution flows in from the bottom of the earthworm cast filter (22), the earthworm cast is filtered through a filter membrane with the mesh number of 70 from bottom to top in the filter, the filtrate is discharged from the top of the filter, and the filtrate is discharged into the sludge reducer (2) again through the sewage return pipe (25); after the earthworm cast is filtered, the first electromagnetic valve (20) is closed, the first switch (19) at the bottom of the earthworm cast filter (22) is opened, water flows in from the top of the earthworm cast filter (22) by utilizing the water flow in the sewage return pipe (25), and the earthworm cast in the earthworm cast filter (22) can be discharged from the bottom of the filter through the filter membrane from top to bottom in the filter to perform a back flushing function;
taking 4 hours as a reaction period of the sludge reducer (2), after each reaction period, on the premise of filtering away earthworm cast at the bottom of the sludge reducer (2), enabling the lifting aeration system (4) to start aeration under the condition that a conical aeration port of the conical aeration pipe (15) is separated from the one-way air inlet hole, enabling the tubificidae to be disturbed and drilled into a mud phase of the vertical module, pulling up a lifting handle (17) of the aeration system at the moment, enabling a conical aeration port of the conical aeration pipe (15) to be inserted into the vertical module (7) through the one-way air inlet hole at the bottom of the vertical module (7), further increasing aeration amount, enabling earthworm bodies and sludge to be flushed out together and suspended in a water phase, and then stopping aeration, enabling the tubificidae and the sludge to be deposited on the upper surface of a filler plate of the horizontal module (8), enabling the tubificidae with good activity to pass through the mud phase of the filler plate; re-draining sludge into the vertical module in the time of waiting for the reattachment of the tubificidae; after the tubificidae is reattached, an intermediate gear (11) close to the rear inner gear ring (10) is embedded into the rear inner gear ring (10) to form gear matching transmission by pushing the rotary handle (14), the rotary handle (14) is rotated clockwise to drive two side plugging plates (902) and two module connecting plates (901) to rotate 90 degrees, so that the horizontal module (8) is communicated together through the two module connecting plates (901) to form a whole, and the two side plugging plates (902) plug two sides of the vertical module (7); pulling the rotating handle (14) to enable the intermediate gear (11) close to the front inner gear ring (12) to be embedded into the front inner gear ring (12) to form gear matching transmission, rotating the rotating handle (14) clockwise to drive the whole vertical rotatable tubificidae predator (3) to rotate, completing position exchange of the vertical module (7) and the horizontal module (8), and predating sludge on the new vertical module (7) by tubificidae;
After the vertical module (7) and the horizontal module (8) are subjected to position exchange once, earthworm bodies at the bottom of the reactor are required to be filtered, a first electromagnetic valve (20) is closed, a second electromagnetic valve (21) is opened, a sludge return pipe (26) is kept smooth, mixed liquid flows in from the bottom of a earthworm body filter (23), the mixed liquid passes through a filter membrane with the mesh number of 20 from bottom to top in the filter, the earthworm bodies are filtered, filtrate with sludge is discharged from the top of the filter, and the filtrate with sludge is discharged into the vertical module (7) again through a sludge return pipe (26) from a sludge discharge port (29) at the top of the vertical module (7) so as to realize sludge return; after the earthworm body is filtered, the second electromagnetic valve (21) is closed, the second switch (24) at the bottom of the earthworm body filter (23) is opened, water flow in the sludge return pipe (26) enters from the top of the earthworm body filter (23), and passes through the filter membrane from top to bottom in the filter to perform a back flushing function, and filtered earthworm bodies can be discharged from the bottom of the earthworm body filter (23).
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| CN101786717A (en) * | 2010-02-05 | 2010-07-28 | 哈尔滨工业大学 | Excess sludge reduction bioreactor with variable aeration and worm attachment oblique plate |
| CN102583924A (en) * | 2011-12-08 | 2012-07-18 | 浙江工商大学 | Tubificidae sludge decrement enhanced biological denitrification device |
| CN103058368A (en) * | 2012-12-06 | 2013-04-24 | 浙江工商大学 | Reactor integrating sludge reduction by using water earthworms and synchronous degradation of organic pollutants and method |
| CN103508640A (en) * | 2013-10-25 | 2014-01-15 | 环境保护部南京环境科学研究所 | Device for wastewater treatment and sludge reduction and stabilization and wastewater treatment method thereof |
| CN114249511A (en) * | 2021-12-24 | 2022-03-29 | 安徽中环环保科技股份有限公司 | Sludge reduction and concentration integrated device |
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| CN108892340A (en) | 2018-11-27 |
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