CN109626561B - Integrated pre-hatching-aerobic granular sludge treatment device and method thereof - Google Patents
Integrated pre-hatching-aerobic granular sludge treatment device and method thereof Download PDFInfo
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- CN109626561B CN109626561B CN201910107489.5A CN201910107489A CN109626561B CN 109626561 B CN109626561 B CN 109626561B CN 201910107489 A CN201910107489 A CN 201910107489A CN 109626561 B CN109626561 B CN 109626561B
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/004—Apparatus and plants for the biological treatment of water, waste water or sewage comprising a selector reactor for promoting floc-forming or other bacteria
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses an integrated pre-hatching-aerobic granular sludge treatment device and an integrated pre-hatching-aerobic granular sludge treatment method, and belongs to the field of water treatment equipment. The device consists of an upper pre-hatching device and a lower aerobic granular sludge device which are separated by a double-layer partition board with a special structure. When the device is used, the aerobic granular sludge device operates in a sequencing batch mode, and the horizontal movable plate and the secondary aeration plate rotate at different angles according to different operation stages, so that the aeration channel and the sludge sinking channel are opened or closed. According to the invention, the aerobic granular sludge is cultivated in the hatching device in advance, the exogenous sludge is periodically added into the aerobic granular sludge device, the nucleation of the aerobic granular sludge is promoted, the quality of the aerobic granular sludge is improved, the wastewater treatment effect is enhanced, and meanwhile, the oxygen is secondarily utilized, so that the energy utilization efficiency is improved.
Description
Technical Field
The invention belongs to the field of water treatment equipment, and particularly relates to an integrated pre-hatching-aerobic granular sludge treatment device and an integrated pre-hatching-aerobic granular sludge treatment method.
Background
The aerobic granular sludge technology is a novel wastewater biological treatment technology, and has the advantages of compact sludge structure, good sedimentation performance, strong impact load resistance, capacity of reducing the occupied area of a secondary sedimentation tank, even omitting the secondary sedimentation tank and the like, so that the technology is widely studied in the field of wastewater biological treatment. However, the aerobic granular sludge is easily disintegrated due to the influence of operating conditions, environmental conditions and toxic and harmful substances in the practical application process, so that the disintegrated aerobic granular sludge system not only reduces the wastewater treatment efficiency, but also further causes the problem of secondary pollution of suspended matters in wastewater due to the generated floc sludge, and greatly limits the application of the aerobic granular sludge technology in the field of wastewater treatment.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide an integrated pre-incubation-aerobic granular sludge treatment device and a method thereof.
The specific technical scheme adopted by the invention is as follows:
the integrated pre-hatching and aerobic granular sludge treatment device comprises a cylindrical reactor, wherein the main body of the treatment device is divided into an upper pre-hatching device and a lower aerobic granular sludge device; the water bath layer is integrally wrapped outside the main body of the treatment device, and a water bath layer water inlet and a water bath layer water outlet are arranged on the water bath layer;
the upper part of the pre-hatching device is provided with a sludge flow adding port and a reagent adding port, the pre-hatching device is provided with a central shaft along the axis, the central shaft is an inner-outer double-layer shaft, the inner shaft is nested by a hollow outer shaft, and the outer shaft and the inner shaft are not contacted with each other and rotate independently; the inner cavity of the pre-hatching device is provided with a plurality of guide plates for promoting air-water mixing at different heights;
the pre-hatching device and the aerobic granular sludge device are separated by a double-layer partition board; the double-layer partition board consists of an upper-layer partition board and a lower-layer partition board; the lower baffle plate is a fixed plate connected and fixed with the side wall of the reactor, and a circular plate are spliced into a circle with the outer diameter equal to the inner diameter of the cross section of the reactor, wherein a plurality of first aeration holes are formed in the circular plate at equal intervals along the circumferential direction, and the interval between every two adjacent first aeration holes is larger than the diameter of each first aeration hole; the annular plate is divided into a plurality of sector areas, and half of the sector areas are hollowed out completely, and the hollowed-out areas and the non-hollowed-out areas are arranged at intervals; the upper layer of partition plate consists of a horizontal movable plate and a secondary aeration plate, and the shape of the horizontal movable plate is the same as that of the annular plate of the lower layer of partition plate and is also hollowed at intervals; the center of the secondary aeration plate is provided with a shaft hole, the shape of the rest positions is completely the same as that of the circular plate of the lower layer of partition plate, and a plurality of second aeration holes are also formed at equal intervals along the circumferential direction; the horizontal movable plate is coaxially nested outside the secondary aeration plate, and both the horizontal movable plate and the secondary aeration plate have the freedom degrees of concentric relative rotation; the upper layer of partition plate is overlapped on the lower layer of partition plate, the horizontal movable plate of the upper layer of partition plate is connected with the outer shaft through a connecting rod, the secondary aeration plate is connected with the inner shaft through the shaft hole, and the horizontal movable plate and the secondary aeration plate are respectively driven to rotate by two shafts;
the bottom of the aerobic granular sludge device is provided with a microporous aeration disc which is sequentially connected with a gas flowmeter and an air compression pump; the top of the aerobic granular sludge device is provided with a gas collector, and an outlet of the gas collector is fixed on the lower surface of a circular plate of the lower partition plate and is used for guiding gas into the upper pre-hatching device through the circular plate; the aerobic granular sludge device is provided with a water inlet and a water outlet, and the water inlet is sequentially connected with a water inlet pump and a water inlet bucket through pipelines.
Preferably, the guide plates are annular and are 3 in number, wherein two guide plates are coaxially fixed on the outer shaft, and the heights of the guide plates are respectively 1/4 and 3/4 of the height of the pre-hatching device; the other piece is coaxially fixed on the inner wall of the pre-hatching device and is positioned at 1/2 height of the pre-hatching device.
Preferably, the side wall or the top of the pre-hatching device is provided with an exhaust port.
Preferably, in the upper layer separator or the lower layer separator, the number of the sector areas is 8.
Preferably, in the upper separator or the lower separator, the number of aeration holes is 8.
Preferably, the gas collector is in a horn shape, and the tapered end of the horn is the same as the circular plate of the lower baffle plate.
Preferably, the outer shaft and the inner shaft are provided at their ends with driving means for driving the outer shaft and the inner shaft to rotate, respectively.
Preferably, the height-to-diameter ratio of the aerobic granular sludge device is 10.
Another object of the present invention is to provide a method for treating pre-hatched-aerobic granular sludge wastewater by using the treatment apparatus according to any one of the above-mentioned aspects, comprising the steps of:
storing the wastewater to be treated in a water inlet barrel, and periodically pumping the wastewater into an aerobic granular sludge device for treatment through a water inlet pump; the aerobic granular sludge device operates in a sequencing batch mode, and treated wastewater is discharged from a water outlet;
in the operation process, anaerobic granular sludge, aerobic activated sludge and a microbial inoculum are periodically added into the pre-hatching device through a sludge flow adding port, a chelating agent is added into the pre-hatching device from a medicine adding port, and the temperature of a water bath layer is controlled to be 23-27 ℃; then in the sequencing batch operation process of the aerobic granular sludge device at the lower part, the first aeration holes on the upper partition plate and the second aeration holes on the lower partition plate are overlapped through the rotary inner shaft in the aeration stage, the aeration gas collected by the gas collector enters the pre-hatching device at the upper part through a channel formed by overlapped aeration holes, and then the gas and the water in the pre-hatching device are fully mixed through the multiple baffling of the plurality of baffle plates, and finally the gas is discharged from the exhaust port, so that the hydraulic shear force generated in the process is utilized to promote the granulation of the sludge in the pre-hatching device; in the non-aeration stage, the first aeration holes on the upper layer of partition plates and the second aeration holes on the lower layer of partition plates are completely misaligned by rotating the inner shaft again, so that the gas is blocked from entering the pre-hatching device;
when the aerobic granular sludge device below is disintegrated or the sludge amount is reduced, the hollow area on the upper partition plate and the hollow area on the lower partition plate are completely overlapped by rotating the outer shaft to form a channel for communicating the pre-hatching device and the aerobic granular sludge device, so that the granular sludge hatched in the pre-hatching device is settled into the aerobic granular sludge device, and the concentration of the granular sludge is supplemented; after the granular sludge is supplemented, the hollow area on the upper partition plate and the hollow area on the lower partition plate are completely misaligned by rotating the outer shaft.
Preferably, in the sequencing batch mode operation process, the operation is carried out for 4 cycles each day, the period of 6 hours is 1 cycle, water is fed for 5min in each cycle, aeration is carried out for 345min, precipitation is carried out for 5min, and water is discharged for 5min.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, the pre-hatching device is arranged above the aerobic granular sludge device, so that the aerobic granular sludge can be cultivated in the pre-hatching device in advance, and then the aerobic granular sludge is periodically fed into the aerobic granular sludge device, so that the nucleation of the aerobic granular sludge is promoted, the quality of the aerobic granular sludge is improved, the stability of the system is maintained, and the wastewater treatment effect is enhanced.
(2) Through the double-layer partition board with unique design, bubbles generated by the microporous aeration plate rise into the pre-hatching device through the secondary aeration opening, independent aeration is not needed, secondary utilization is carried out on oxygen, and the utilization efficiency of energy sources is improved.
Drawings
FIG. 1 is a schematic diagram of an integrated pre-incubation-aerobic granular sludge treatment device;
FIG. 2 is an enlarged schematic view of the position of a double layer separator;
FIG. 3 is a schematic view of the lower separator plate structure;
FIG. 4 is a schematic view of the upper separator plate in a first state;
FIG. 5 is a schematic view of the upper separator plate in a second state;
FIG. 6 is a schematic view of the upper separator plate in a third state;
FIG. 7 is a schematic structural view of an integrated pre-incubation-aerobic granular sludge treatment device according to another embodiment;
in the figure: the pre-hatching device 1, the aerobic granular sludge device 2, a sludge feeding port 3, a reagent feeding port 4, a guide plate 5, a horizontal movable plate 6, a microporous aeration disc 7, an exhaust port 8, a water bath layer 9, a water outlet 10, an electromagnetic valve 11, an air compression pump 12, a water inlet pump 13, a controller 14, a driving device 15, a connecting rod 16, a gas flowmeter 17, a secondary aeration plate 18, a water inlet barrel 19, a water bath layer water inlet 20, a water bath layer water outlet 21, an outer shaft 22, an inner shaft 23, a fixed plate 24 and a gas collector 25.
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.
FIG. 1 is a schematic view of an integrated pre-incubation-aerobic granular sludge treatment apparatus according to a preferred embodiment of the present invention. The main body of the treatment device is a cylindrical reactor, and the inside of the reactor is hollow and is used as a reaction zone. The whole device is divided into an upper pre-hatching device 1 and a lower aerobic granular sludge device 2. The outside of the main body of the treatment device is integrally wrapped with a water bath layer 9 jacket, a water bath layer water inlet 20 and a water bath layer water outlet 21 are arranged on the water bath layer 9, the water inlet and the water outlet can be connected with an external water circulation system, and the temperature in the reactor is controlled and regulated through the water bath temperature. The height-to-diameter ratio of the aerobic granular sludge device 2 can be set to 10. In the device, the pre-hatching device 1 is used for pre-cultivating aerobic granular sludge, and then periodically feeding the aerobic granular sludge into the aerobic granular sludge device 2 according to the requirement so as to supplement disintegrated or lost granular sludge and maintain the concentration of the granular sludge in the lower aerobic granular sludge device 2.
The upper part of the pre-hatching device 1 is provided with a sludge flow adding port 3 and a reagent adding port 4, and components necessary for the circulation of the granular sludge, such as granular sludge, aerobic activated sludge, bacterial agents (which can be added according to water quality selection), culture mediums and the like can be added through the sludge flow adding port 3, and other medicines, such as chelating agents and the like, can be added through the reagent adding port 4. The pre-hatching device 1 is provided with a central shaft along the axis, the central shaft is a nested shaft with an inner layer and an outer layer, and the pre-hatching device is formed by nesting a hollow outer shaft 22 outside an inner shaft 23. The outer shaft 22 and the inner shaft 23 extend out of the top of the pre-hatching apparatus 1 for fixation, and the outer shaft 22 and the inner shaft 23 are not in contact with each other, so that they can rotate independently of each other. The two shafts may be rotated by manual driving, or may be rotated by providing driving means 15 at the ends thereof. In this embodiment, the outer shaft 22 and the inner shaft 23 are provided with two independently controlled drive motors at their ends, respectively. In addition, a plurality of guide plates 5 for promoting air-water mixing are arranged at different heights in the inner cavity of the pre-hatching device 1 according to the culture requirement of the granular sludge. In this embodiment, the baffle plates 5 are all annular and have 3 blocks, wherein two blocks are coaxially fixed on the outer shaft 22 and synchronously rotate along with the shaft. The two deflectors 5 are located at 1/4 and 3/4 of the height of the pre-hatching device 1, respectively. The outer diameter of the other deflector 5 is the same as the inner diameter of the reactor, and the deflector is coaxially fixed on the inner wall of the pre-hatching device 1, and is positioned at 1/2 height of the pre-hatching device 1.
The granular sludge in the pre-hatching apparatus 1 needs to be cultured for a certain time, and the culture process is synchronous with the wastewater treatment process in the aerobic granular sludge apparatus 2 below. Therefore, special separation is needed to ensure that the granular sludge is normally cultured in the upper device and the cultured granular sludge can be lowered into the aerobic granular sludge device 2 when needed. In order to achieve the object, the pre-hatching device 1 and the aerobic granular sludge device 2 in the embodiment are separated by a double-layer partition board with a special structure. As shown in fig. 2, the double-layered separator is composed of an upper separator and a lower separator.
The lower partition plate is a fixed plate 24 fixedly connected with the side wall of the reactor. The structure of the fixing plate 24 is shown in fig. 3, and the annular plate and the circular plate are spliced into a circular shape with the outer diameter equal to the inner diameter of the cross section of the reactor, and the annular plate and the circular plate can be spliced by two plates or can be integrally formed. Wherein, 8 first aeration holes have been seted up along the hoop on the circular plate, are equidistant between 8 first aeration holes, along circumference equipartition, and the central angle between two holes is 45. And considering that the aeration channel opening and closing control is required to be matched with the upper layer partition plate, the distance between the adjacent first aeration holes is required to be ensured to be larger than the diameter of the first aeration holes. In addition, the annular plate is equally divided into 8 sector areas, 4 sector areas are all hollowed out, and the hollowed-out areas and the non-hollowed-out areas are alternately arranged at intervals.
Referring to fig. 4, the upper partition is also composed of the horizontal movable plate 6 and the secondary aeration panel 18. The shape and the size of the horizontal movable plate 6 are the same as those of the annular plate in the lower-layer partition plate, the horizontal movable plate is equally divided into 8 sector areas, 4 sector areas are all hollowed out, and the hollowed-out areas and the non-hollowed-out areas are alternately arranged. The shape and the size of the rest positions of the secondary aeration plate 18 are completely the same as those of the circular plate of the lower separator except the shaft hole formed in the center, and 8 second aeration holes are formed in the circumferential direction at equal intervals. However, the horizontal movable plate 6 is coaxially nested outside the secondary aeration plate 18, and both are on the same horizontal plane, and both have degrees of freedom of concentric relative rotation, i.e. the horizontal movable plate 6 can rotate against the outer edge of the secondary aeration plate 18, and the secondary aeration plate 18 can also rotate against the inner edge of the horizontal movable plate 6, and both the two rotations can be independently performed. The upper layer of partition board is overlapped on the lower layer of partition board, one surfaces of the upper layer of partition board and the lower layer of partition board are contacted, and the contact surface is ensured to be watertight as much as possible. The independent control between the secondary aeration panel 18 and the horizontal movable panel 6 is realized through a double-layer nested shaft in the center of the pre-hatching device 1, specifically: the 4 non-hollowed areas in the horizontal movable plate 6 of the upper-layer partition plate are respectively connected with the outer shaft 22 through 4 connecting rods 16, so that the horizontal movable plate 6 can rotate along with the rotation of the outer shaft 22. Similarly, the secondary aeration panel 18 and the inner shaft 23 form a matched transmission through the shaft hole in the center of the panel, so that the secondary aeration panel 18 can rotate along with the rotation of the inner shaft 23.
During the particle sludge culture process, the water flow between the pre-hatching device 1 and the aerobic particle sludge device 2 should be kept not to be exchanged, but the aeration in the aerobic particle sludge device 2 needs to enter the pre-hatching device 1. At this time, the lower partition is placed in the state shown in fig. 3 and the upper partition is placed in the state shown in fig. 4 by rotating the outer shaft 22 and the inner shaft 23. Because the two partition boards are overlapped, the first aeration holes on the upper partition board and the second aeration holes on the lower partition board are completely overlapped to form an aeration channel capable of guiding lower gas into the upper part, the hollowed-out areas on the upper partition board and the hollowed-out areas on the lower partition board are completely misaligned, the upper and lower non-hollowed-out areas are just spliced into a complete ring, and the upper and lower water flows cannot be exchanged. The cross section aperture of the aeration channel can be set to be 10mm, so that the aerobic granular sludge at the upper end can pass through without blocking. When the aeration channel is required to be closed, the upper baffle plate is adjusted to rotate 22.5 degrees around the circle center and is positioned in the state shown in figure 5, and at the moment, because the distance between the adjacent first aeration holes and the adjacent second aeration holes is larger than the diameter of the first aeration holes and the second aeration holes, when the aeration holes on the upper aeration plate and the lower aeration plate are staggered for 22.5 degrees of the circle center angle, the first aeration holes and the second aeration holes are completely misaligned, and no communication channel exists. When the particle sludge is cultivated, a sludge discharging channel can be formed between the pre-hatching device 1 and the aerobic particle sludge device 2 when the particle sludge needs to be supplemented downwards. At this time, the lower partition is placed in the state shown in fig. 3 and the upper partition is placed in the state shown in fig. 6 by rotating the outer shaft 22 and the inner shaft 23. Because the two partition boards are overlapped, the hollowed-out areas on the upper partition board and the lower partition board are completely overlapped, and the particle sludge hatched in the pre-hatching device 1 is settled into the aerobic particle sludge device 2. When the addition of the granular sludge is finished, the upper partition plate can be rotated for 45 degrees around the circle center again, so that the hollowed-out area on the upper partition plate and the hollowed-out area on the lower partition plate are not overlapped completely, and the sinking of the granular sludge is stopped. Therefore, the aeration channel and the sludge sinking channel can be independently controlled to be opened and closed through two shafts according to the reaction requirement.
In addition, the whole aeration of the device is from a microporous aeration disc 7 arranged at the bottom of the aerobic granular sludge device 2, the microporous aeration disc 7 is sequentially connected with a gas flowmeter 17 and an air compression pump 12, and the aeration amount is controlled by the gas flowmeter 17. The top of the aerobic granular sludge device 2 is provided with a gas collector 25, in this embodiment, the gas collector 25 is in a horn mouth shape, the tapered end shape of the horn mouth is the same as that of the circular plate of the lower layer of the baffle, and the two are opposite to and sealed and fixed. The bell mouth-shaped gas collector can gather bubbles generated by the microporous aeration disc 7 below, then the gas is led into the pre-hatching device 1 above through the aeration channel on the double-layer partition plate to perform secondary aeration, and an aeration system is not required to be additionally arranged. In addition, the aerobic granular sludge device 2 is provided with a water inlet and a water outlet 10, the water inlet is sequentially connected with a water inlet pump 13 and a water inlet barrel 19 through pipelines, waste water to be treated can be stored in the water inlet barrel 19 in advance, and then the waste water can be pumped into the reactor periodically according to the reaction progress.
In addition, an exhaust port 8 may be provided at the side wall or top of the pre-hatching apparatus 1 in consideration of the exhaust need during aeration. In addition, the gas in the aerobic granular sludge device 2 generally enters the pre-hatching device 1 above through the double-layer partition plate, and an exhaust port is not required to be arranged. However, if the aeration channel is closed in the aeration process, or the gas collector cannot collect aeration bubbles completely, the aerobic granular sludge device 2 is required to be considered to be provided with an exhaust port, the exhaust port can be arranged at the top of the side wall of the aerobic granular sludge device 2, the exhaust port is externally connected with an exhaust pipe, the outlet of the exhaust pipe is higher than the top of the whole reactor as much as possible, and the internal liquid is ensured not to flow outwards.
In addition, in other embodiments, the controller 14 may be provided in the above device for automatic control. The water outlet 10 is controlled to be opened and closed by an electromagnetic valve 11, and the air compression pump 12, the water inlet pump 13, the electromagnetic valve 11, the driving device 15 and the like can control the running time of each stage of the reactor through a controller 14, as shown in fig. 7. The controller 14 may be a time controller, a single-chip microcomputer, a PLC, a DCS, or other devices, and is not limited in form.
The pre-incubation-aerobic granular sludge wastewater treatment method based on the treatment device comprises the following steps:
in the normal treatment process, the wastewater to be treated is stored in a water inlet barrel 19 and is pumped into the aerobic granular sludge device 2 for treatment by a water inlet pump 13 at regular intervals; the aerobic granular sludge device 2 operates in a sequencing batch mode, and treated wastewater is discharged from the water outlet 10. In the sequencing batch mode operation process, the operation can be generally carried out for 4 cycles each day, 6 hours is 1 cycle, water is fed for 5min in each cycle, aeration is carried out for 345min, precipitation is carried out for 5min, and water is discharged for 5min.
In the running process, the granular sludge in the aerobic granular sludge device 2 is easily influenced by the operation condition, the environmental condition and toxic and harmful substances to generate disintegration, and the disintegrated aerobic granular sludge system not only reduces the wastewater treatment efficiency. Therefore, the aerobic granular sludge needs to be cultivated in advance in the hatching device periodically, exogenous sludge is added into the aerobic granular sludge device periodically, the nucleation of the aerobic granular sludge is promoted, the quality of the aerobic granular sludge is improved, and the wastewater treatment effect is enhanced.
In general, anaerobic granular sludge, aerobic activated sludge and culture medium (which may be wastewater or other formulated medium) are added to the pre-hatching apparatus 1 through the sludge flow-adding port 3 every 5 days, and the corresponding necessary functional microbial inoculum is added according to the water quality requirement, and further, a chelating agent is added to the pre-hatching apparatus 1 through the medicine adding port 4, wherein the chelating agent can be selected according to the requirement, such as polysaccharide (or protein) and Ca 2+ Ions (or Fe) 2+ Ion) and the concentration of the chelating agent is 20mg/L. Meanwhile, in order to ensure that the granular sludge is hatched successfully, the temperature of the water bath layer 9 needs to be controlled at 23-27 ℃. Then atIn the sequencing batch operation process of the aerobic granular sludge device 2 at the lower part, the first aeration holes on the upper partition plate and the second aeration holes on the lower partition plate are overlapped through the rotary inner shaft 23 in the aeration stage, the aeration gas collected by the gas collector 25 enters the pre-hatching device 1 at the upper part through a channel formed by overlapped aeration holes, and then the gas and the water in the pre-hatching device 1 are fully mixed through the repeated baffling of the plurality of baffle plates 5, and finally the gas is discharged from the exhaust port 8, so that the sludge in the pre-hatching device 1 is granulated by utilizing the hydraulic shear force generated in the process. In the non-aeration stage, the first aeration holes on the upper partition plate and the second aeration holes on the lower partition plate are completely misaligned by rotating the inner shaft 23 again, so that the gas is blocked from entering the pre-hatching device 1.
When the aerobic granular sludge device 2 below is disintegrated or the sludge amount is reduced, the hollow area on the upper partition plate and the hollow area on the lower partition plate are completely overlapped by rotating the outer shaft 22, so that a channel for communicating the pre-hatching device 1 and the aerobic granular sludge device 2 is formed, and the granular sludge hatched in the pre-hatching device 1 is settled into the aerobic granular sludge device 2 to supplement the concentration of the granular sludge. The supplementing amount of the granular sludge is required according to the actual situation, and the granular sludge is not required to be fully supplemented. After the granular sludge is supplemented, the hollow area on the upper partition plate and the hollow area on the lower partition plate are completely misaligned by rotating the outer shaft 22. After the granular sludge is supplemented, the aerobic granular sludge device 2 can continuously treat the wastewater according to a normal sequencing batch process.
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. An integrated pre-hatching-aerobic granular sludge treatment device is characterized in that a treatment device main body is a cylindrical reactor and is divided into an upper pre-hatching device (1) and a lower aerobic granular sludge device (2); the outside of the main body of the treatment device is integrally wrapped with a water bath layer (9), and a water bath layer water inlet (20) and a water bath layer water outlet (21) are arranged on the water bath layer (9);
the upper part of the pre-hatching device (1) is provided with a sludge flow adding port (3) and a reagent adding port (4), the pre-hatching device (1) is provided with a central shaft along the axis, the central shaft is an inner-outer double-layer shaft, the central shaft is formed by nesting a hollow outer shaft (22) outside an inner shaft (23), and the outer shaft (22) and the inner shaft (23) are not contacted with each other and rotate independently; the inner cavity of the pre-hatching device (1) is provided with a plurality of guide plates (5) for promoting air-water mixing at different heights;
the pre-hatching device (1) and the aerobic granular sludge device (2) are separated by a double-layer partition board; the double-layer partition board consists of an upper-layer partition board and a lower-layer partition board; the lower baffle plate is a fixed plate (24) fixedly connected with the side wall of the reactor, the annular plate and the circular plate are spliced into a circle with the outer diameter equal to the inner diameter of the cross section of the reactor, a plurality of first aeration holes are formed in the circular plate at equal intervals along the circumferential direction, and the interval between every two adjacent first aeration holes is larger than the diameter of each first aeration hole; the annular plate is divided into a plurality of sector areas, and half of the sector areas are hollowed out completely, and the hollowed-out areas and the non-hollowed-out areas are arranged at intervals; the upper-layer partition plate consists of a horizontal movable plate (6) and a secondary aeration plate (18), wherein the shape of the horizontal movable plate (6) is the same as that of an annular plate of the lower-layer partition plate, and the upper-layer partition plate is also hollowed at intervals; the center of the secondary aeration plate (18) is provided with a shaft hole, the shape of the rest positions is completely the same as that of the circular plate of the lower layer of partition plate, and a plurality of second aeration holes are also formed at equal intervals along the circumferential direction; the horizontal movable plate (6) is coaxially nested outside the secondary aeration plate (18) and has the freedom degree of concentric relative rotation; the upper layer of partition plates are overlapped on the lower layer of partition plates, the horizontal movable plate (6) of the upper layer of partition plates is connected with the outer shaft (22) through the connecting rod (16), the secondary aeration plate (18) is connected with the inner shaft (23) through the shaft hole, and the horizontal movable plate (6) and the secondary aeration plate (18) are respectively driven to rotate by two shafts;
a microporous aeration disc (7) is arranged at the bottom of the aerobic granular sludge device (2), and the microporous aeration disc (7) is sequentially connected with a gas flowmeter (17) and an air compression pump (12); the top of the aerobic granular sludge device (2) is provided with a gas collector (25), and an outlet of the gas collector (25) is fixed on the lower surface of a circular plate of a lower-layer partition plate and is used for guiding gas into the upper pre-hatching device (1) through the circular plate; the aerobic granular sludge device (2) is provided with a water inlet and a water outlet (10), and the water inlet is sequentially connected with a water inlet pump (13) and a water inlet barrel (19) through pipelines.
2. The integrated pre-hatching-aerobic granular sludge treatment device as claimed in claim 1, wherein the guide plates (5) are all annular and are all 3 blocks, wherein two blocks are coaxially fixed on the outer shaft (22), and the heights of the guide plates are respectively 1/4 height and 3/4 height of the pre-hatching device (1); the other piece is coaxially fixed on the inner wall of the pre-hatching device (1) and is positioned at 1/2 height of the pre-hatching device (1).
3. The integrated pre-hatching-aerobic granular sludge treatment device as claimed in claim 1, wherein the side wall or the top of the pre-hatching device (1) is provided with an exhaust port (8).
4. The integrated pre-hatching-aerobic granular sludge treatment device according to claim 1, wherein the number of the sector areas in the upper layer partition board or the lower layer partition board is 8.
5. The integrated pre-hatching-aerobic granular sludge treatment device according to claim 1, wherein the number of aeration holes in the upper layer partition board or the lower layer partition board is 8.
6. The integrated pre-hatching-aerobic granular sludge treatment device as claimed in claim 1, wherein the gas collector (25) is in a horn shape, and the tapered end of the horn shape is identical to the circular plate of the lower partition plate.
7. An integrated pre-incubation-aerobic granular sludge treatment device as claimed in claim 1 wherein the ends of the outer shaft (22) and the inner shaft (23) are provided with drive means (15) for driving the shafts respectively in rotation.
8. The integrated pre-incubation-aerobic granular sludge treatment device as claimed in claim 1, wherein the ratio of the height to the diameter of the aerobic granular sludge device (2) is 10.
9. A method for treating pre-hatched-aerobic granular sludge wastewater by using the treatment apparatus according to any one of claims 1 to 8, characterized by comprising the steps of:
storing the wastewater to be treated in a water inlet barrel (19), and periodically pumping the wastewater into an aerobic granular sludge device (2) for treatment through a water inlet pump (13); the aerobic granular sludge device (2) operates in a sequencing batch mode, and treated wastewater is discharged from the water outlet (10);
in the running process, anaerobic granular sludge, aerobic activated sludge and a microbial inoculum are periodically added into the pre-hatching device (1) through a sludge flow adding port (3), a chelating agent is added into the pre-hatching device (1) from a medicine adding port (4), and the temperature of a water bath layer (9) is controlled to be 23-27 ℃; then in the sequencing batch operation process of the aerobic granular sludge device (2) below, in the aeration stage, the first aeration holes on the upper partition plate and the second aeration holes on the lower partition plate are overlapped through the rotary inner shaft (23), aeration gas collected by the gas collector (25) enters the pre-hatching device (1) above through a channel formed by overlapped aeration holes, and then the gas and the water in the pre-hatching device (1) are fully mixed through the multiple baffling of the plurality of baffle plates (5), and finally the gas is discharged from the exhaust port (8), and the hydraulic shear force generated in the process is utilized to promote the granulation of the sludge in the pre-hatching device (1); in the non-aeration stage, the first aeration holes on the upper layer of partition plates and the second aeration holes on the lower layer of partition plates are completely misaligned by rotating the inner shaft (23) again, so that the gas is blocked from entering the pre-hatching device (1);
when the aerobic granular sludge device (2) below is disintegrated or the sludge amount is reduced, the hollow area on the upper partition plate and the hollow area on the lower partition plate are completely overlapped by rotating the outer shaft (22) to form a channel for communicating the pre-hatching device (1) and the aerobic granular sludge device (2), so that the granular sludge hatched in the pre-hatching device (1) is settled into the aerobic granular sludge device (2) to supplement the concentration of the granular sludge; after the granular sludge is supplemented, the hollow area on the upper partition plate and the hollow area on the lower partition plate are completely misaligned by rotating the outer shaft (22).
10. The method for treating wastewater by pre-hatching and aerobic granular sludge according to claim 9, wherein in the sequencing batch mode operation process, the operation is performed for 4 cycles per day, the period of 6 hours is 1 cycle, the water inflow is 5min, the aeration is 345min, the precipitation is 5min, and the water outflow is 5min.
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