CN215627047U - Circulation alternating sludge disposal system based on aerobic granular sludge SBR reactor - Google Patents
Circulation alternating sludge disposal system based on aerobic granular sludge SBR reactor Download PDFInfo
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- CN215627047U CN215627047U CN202121413387.5U CN202121413387U CN215627047U CN 215627047 U CN215627047 U CN 215627047U CN 202121413387 U CN202121413387 U CN 202121413387U CN 215627047 U CN215627047 U CN 215627047U
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Abstract
The utility model provides a circulation alternating type sludge disposal system based on an aerobic granular sludge SBR reactor, which comprises: the buffer pool of intaking, SBR reaction tank, the mud buffer pool that communicate in proper order, SBR reaction tank still includes: a circulation mechanism that is used for SBR reactor simultaneously to advance water and go out water, an aeration main reaction mechanism that is used for SBR reactor continuous treatment sewage, the mud buffer pool still includes: a sludge concentration tank for secondary mud-water separation; the utility model has the advantages that: the aeration main reaction mechanism adopts two groups of four reaction chambers, and the processes of water inlet/drainage, reaction and precipitation are alternately completed in sequence; when one group of reaction chambers is used for water inlet/water discharge, the other group of reaction chambers completes the reaction and precipitation processes, and the processes are circularly alternated, so that the removal effect is ensured as much as possible, and the water inlet and outlet continuity of the whole aerobic granular sludge system is ensured.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment devices, and particularly relates to a circulation alternating type sludge treatment system based on an aerobic granular sludge SBR reactor.
Background
SBR (sequencing Batch Reactor Activated Sludge process) is a short name of a sequence Batch type Activated Sludge process, is an Activated Sludge sewage treatment technology which operates according to an intermittent aeration mode, and is also called a sequence Batch type Activated Sludge process. The SBR process adopts an operation mode of time division to replace an operation mode of space division, an unstable biochemical reaction to replace a stable biochemical reaction, and a standing ideal precipitate to replace a traditional dynamic precipitate. The degradation of the pollutants is a plug flow process in time, and the microorganisms are in the periodic change of aerobic, anoxic and anaerobic states, so that the pollutants are removed, and the functions of nitrogen removal and phosphorus removal are achieved. It is mainly characterized by that it adopts orderly and intermittent operation in operation, and the SBR reaction tank integrates the functions of homogenization, primary precipitation, biodegradation and secondary precipitation, etc. in one tank.
So far, most aerobic granular sludge has been cultured in SBR reactors and their variants. This is relevant for the batch mode of operation of SBR. During each operating cycle of SBR, the microorganisms experience a substrate-rich and substrate-poor phase. The alternate satiation-hunger state forms a biological selection pressure, which is beneficial to selecting microorganisms which can absorb substrates and store the substrates in cells in the satiation period, and metabolize the intracellular storage substances in the hunger period, such as phosphorus accumulating bacteria, polysaccharide bacteria and the like, wherein the microorganisms have a slow growth rate and are easy to gather together to form stable granular sludge; in addition, the microorganisms are in the starvation phase. The surface characteristics such as hydrophobicity, surface load, viscosity and the like of the sludge can also change to adapt to the environment with deficient matrix, and the formation of granular sludge is facilitated.
At present, the traditional SBR reactor operates in three phases: sewage water inlet and clear water outlet stages, an aeration stage and a rapid precipitation stage. In the influent stage, the effluent is fed into the reactor so that the effluent treated in the previous cycle can be displaced or "pushed out" of the reactor. After water is fed, the biological tank enters an aeration stage, namely a main reaction stage of AGS, because the granular sludge is of a spherical layered structure, nitrobacteria and nitrosobacteria are mainly attached to the outer side of the granular sludge, ammonia nitrogen is converted into nitrite and nitrate, then the nitrite and the nitrate are transferred into the granular sludge, and simultaneously oxygen is utilized by the external bacteria, an anoxic zone is formed in the granular sludge, the anoxic zone contains denitrifying bacteria, the nitrite nitrogen and the nitrate nitrogen which are transferred in are denitrified and removed, the dephosphorization effect is also enhanced by the structure, after the reaction is finished, the reaction enters a rapid precipitation stage for precipitation, the reacted sewage is pushed out of a reactor by the next batch of sewage, the reactor enters a next flow, and the residual sludge generated by the reaction enters a sludge buffer tank and is pumped to a dewatering machine room through the sludge pump. However, the engineering application of the aerobic granular sludge treatment technology is not mature. The main problems are as follows: 1. in the main reaction stage of the AGS, aerobic granular sludge needs to fully react with sewage, so that the continuous entering of the sewage cannot be realized, and the current solution on the market is to intermittently control the sewage flowing into the reactor through a PLC (programmable logic controller); 2. the decanter which is arranged in the SBR reactor and used for regularly removing the clarified water has the defect of intensive maintenance; 3. and the excess sludge generated by the reaction in the rapid precipitation stage enters a sludge buffer tank and needs to be pumped to a dewatering machine room for secondary dewatering. The practical application of the aerobic granular sludge treatment system is limited due to the disadvantages such as the above.
In addition, the current SBR reactor is unreasonable in design of a water inlet pipe and a water outlet pipe of sewage, so that simultaneous water inlet and water discharge cannot be realized, for example, the current SBR reactor is disclosed in the following Chinese patent: CN 210764548U discloses a particle size screening plant of good oxygen granule sludge system of SBR reactor, including SBR reactor, aeration head and intake pipe, is equipped with the reaction chamber in the SBR reactor, and SBR reactor top is equipped with the inlet tube, and SBR reactor lateral part is equipped with outlet pipe … …. The above patent suffers from the above problems because the sewage introduced from the upper portion secondarily pollutes the clean water discharged from the side portion when the water supply and the water discharge are operated simultaneously.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, it is an object of the present invention to provide a cyclically alternating sludge treatment system based on an aerobic granular sludge SBR reactor for the engineered sewage treatment of an aerobic granular sludge SBR reactor, which overcomes the above-mentioned disadvantages of the prior art.
The utility model provides a circulation alternating type sludge disposal system based on an aerobic granular sludge SBR reactor, which comprises: the improvement of intaking buffer pool, SBR reaction tank, the mud buffer pool that communicate in proper order is, SBR reaction tank still includes: a circulation mechanism that is used for SBR reactor simultaneously to advance water and go out water, an aeration main reaction mechanism that is used for SBR reactor continuous treatment sewage, the mud buffer tank still includes: the sludge concentration tank is used for secondary sludge-water separation, the aeration main reaction mechanism is communicated with a sewage inlet pipe through the circulating mechanism, and the sludge concentration tank is communicated with the aeration main reaction mechanism through the circulating mechanism;
the aeration main reaction mechanism comprises: the device comprises an SBR reaction tank consisting of at least one group of reaction chambers, a water inlet positioned at the bottom of the reaction chambers and a water outlet positioned at the top of the reaction chambers, wherein a membrane modularization layer is arranged in the reaction chambers, aerobic granular sludge is arranged in a membrane modularization layer interception tank, the water inlets of the two groups of reaction chambers are connected with a circulation mechanism, the water inlets are positioned below the membrane modularization layer, the water outlet is positioned above the membrane modularization layer, and the water outlet of the reaction chambers is a static fixed overflow weir; the two reaction chambers sequentially and alternately complete water inlet/drainage, reaction and precipitation processes; when one reaction chamber is filled with water/drained, the other reaction chamber completes the reaction and precipitation processes;
the circulation mechanism includes: a sewage inlet pipe communicated with the water inlet buffer tank, a sewage drain pipe connected with the reacted sewage storage tank, a residual sludge discharge pipe communicated with the sludge buffer tank, and an electromagnetic three-way valve arranged on the sewage inlet pipe; the two electromagnetic three-way valves on the sewage inlet pipe are respectively communicated with the water inlets of the two groups of reaction chambers through two groups of pipelines, the electromagnetic control valves are respectively arranged on the branch pipelines, and the sewage drain pipe is communicated with the static fixed overflow weir;
the sludge concentration tank includes: the main tank support, install the main tank body on the main tank support, be located the teeter chamber on main tank body upper portion, be located the sediment drainage chamber of main tank body bottom, main tank body top is provided with the rabbling mechanism who stretches into the teeter chamber, the teeter chamber and sediment drainage chamber intercommunication, sediment drainage chamber is the trapezium structure, there is the outlet sediment drainage chamber bottom, main tank support below is provided with the drain pipe with outlet connection to and drain pump with drain pipe connection, be provided with into mud mouth on the main tank body, go into mud mouth and mud pipe connection.
As the preferable structure of the utility model, the four sewage inlet pipes are connected with a water inlet pump and a water inlet stabilizer.
As a preferable structure of the utility model, a homogenizing aerator, a sludge screening device and a sludge pump are arranged in the aeration main reaction mechanism.
As the preferable structure of the utility model, the sludge discharge pipe is provided with a sludge discharge automatic valve group, and the sewage inlet pipe is provided with a water inlet automatic valve group.
As a preferable structure of the utility model, the stirring mechanism consists of a stirrer arranged on the main tank bracket and a stirring frame arranged on a driving shaft of the stirrer, and the stirring frame is of a groined structure consisting of two cross beams and two vertical beams.
The utility model has the following beneficial effects:
1. the aeration main reaction mechanism of the utility model is different from the traditional SBR reactor, the water outlet of the reaction chamber adopts a fixed weir water outlet mode, namely, in the water inlet stage, the wastewater enters from the bottom of the reaction chamber, so that the wastewater treated in the previous cycle can be replaced or pushed out of the reaction chamber. This application does not require a separate time consuming drainage phase. More importantly, the use of a static fixed overflow weir replaces the mobile and maintenance intensive decanter typically used in SBR systems, resulting in a significant reduction in maintenance costs.
2. The aeration main reaction mechanism adopts four reaction chambers of two groups, and the processes of water inlet/drainage, reaction and precipitation are alternately completed in sequence; when one group of reaction chambers is used for water inlet/water discharge, the other group of reaction chambers completes the reaction and precipitation processes, and the processes are circularly alternated, so that the removal effect is ensured as much as possible, and the water inlet and outlet continuity of the whole aerobic granular sludge system is ensured.
Drawings
Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:
fig. 1 is a front view of the overall structure of the present invention.
FIG. 2 is a schematic structural diagram of the main aeration reaction mechanism of the present invention.
FIG. 3 is a schematic view of the structure of the sludge thickening tank of the present invention.
FIG. 4 is a schematic structural diagram of the main aeration reaction mechanism of the present invention.
Description of the drawings: the system comprises a circulation mechanism 1, a sewage inlet pipe 101, a sewage drain pipe 102, a sludge discharge pipe 103, a branch pipeline 104, an aeration main reaction mechanism 2, a reaction chamber 201, an SBR reaction tank 202, a water inlet 203, a water outlet 204, aerobic granular sludge 205, a sludge concentration tank 3, a main tank bracket 301, a main tank 302, a stirring chamber 303, a precipitation drain chamber 304, a water outlet 305, a water drain pipe 306, a drainage pump 307, a sludge inlet 308, a stirrer 309, a stirring frame 310, a sewage inlet pipe 4, a water inlet pump 5, a water inlet stabilizer 6, a homogenizing aerator 7, a sludge screener 8 and a sludge pump 9.
Detailed Description
In order to make the technical solutions and advantages thereof better understood by those skilled in the art, the present application is described in detail below with reference to the accompanying drawings, but the present application is not limited to the scope of the present invention.
Referring to FIGS. 1-4: the circulation alternating sludge disposal system based on the aerobic granular sludge SBR reactor provided by the embodiment comprises: the buffer pool of intaking, SBR reaction tank, the mud buffer pool that communicate in proper order, SBR reaction tank still includes: a circulation mechanism 1 that is used for SBR reactor to advance water and go out water simultaneously, an aeration main reaction mechanism 2 that is used for SBR reactor continuous treatment sewage, the mud buffer pool still includes: and the sludge concentration tank 3 is used for secondary sludge-water separation, the aeration main reaction mechanism 2 is communicated with a sewage inlet pipe 4 through the circulating mechanism 1, and the sludge concentration tank 3 is communicated with the aeration main reaction mechanism 2 through the circulating mechanism 1.
The aeration main reaction mechanism 2 in the present embodiment includes: the device comprises an SBR reaction tank 202 consisting of four reaction chambers 201, a water inlet 203 positioned at the bottom of the reaction chambers 201 and a water outlet 204 positioned at the top of the reaction chambers 201, wherein a membrane differentiation layer is arranged in the reaction chambers 201, aerobic granular sludge 205 is arranged in a membrane differentiation layer interception tank, the water inlets of the four reaction chambers 201 are connected with a circulation mechanism 1, the water inlet 203 is positioned below the aerobic granular sludge 205, the water outlet 204 is positioned above the aerobic granular sludge 205, and the water outlet 204 of the reaction chambers 201 is a static fixed overflow weir; the four reaction chambers 201 in two groups sequentially and alternately complete water inlet/drainage, reaction and precipitation processes; when water is fed/drained to/from two reaction chambers 201, the other two reaction chambers 201 complete the reaction and precipitation processes; the circulation is alternated, so that the removal effect is ensured as much as possible, and the continuity of water inlet and outlet of the whole aerobic granular sludge system is ensured.
The circulation mechanism 1 in the present embodiment includes: a sewage inlet pipe 101 communicated with the water inlet buffer tank, a sewage drain pipe 102 connected with the reacted sewage storage tank, a residual sludge discharge pipe 103 communicated with the sludge buffer tank, and an electromagnetic three-way valve arranged on the sewage inlet pipe 101; the two electromagnetic three-way valves on the sewage inlet pipe 102 are respectively communicated with the water inlets 203 of the four reaction chambers 201 through the two-component pipelines 104, the electromagnetic control valves are respectively arranged on the component pipelines 104, and the sewage outlet pipe 102 is communicated with the static fixed overflow weir (water outlet 204); the static fixed overflow weir is a structure for overflowing liquid on the tower plate, has the functions of maintaining a liquid layer on the plate and enabling the liquid to overflow uniformly, and is an outlet weir in the embodiment.
The sludge thickening tank 3 in the present embodiment includes: main tank support 301, install the main jar body 302 on main tank support 301, be located the agitator chamber 303 on main jar body 302 upper portion, be located the sediment drainage chamber 304 of the main jar body 302 bottom, main jar body 302 top is provided with the rabbling mechanism who stretches into agitator chamber 303, agitator chamber 303 and sediment drainage chamber 304 intercommunication, sediment drainage chamber 304 is the trapezoidal structure that falls, there is outlet 305 sediment drainage chamber 304 bottom, main tank support 301 below is provided with the drain pipe 306 of being connected with outlet 305 to and the drain pump 307 of being connected with drain pipe 306, be provided with into mud mouth 308 on the main jar body 302, it is connected with mud pipe 103 to go into mud mouth 308. The stirring mechanism is composed of a stirrer 309 arranged on the main tank support 301 and a stirring frame 310 arranged on a driving shaft of the stirrer 309, and the stirring frame 310 is of a # -shaped structure composed of two cross beams and two vertical beams. And a sludge discharge port is formed in the side wall of the stirring chamber.
Four in this embodiment all be connected with intake pump 5 and intake stabilizer 6 on sewage inlet pipe 101, intake pump 5's parameter is Q910 m3H, H is 15m, N is 75kW, and the model of intake stabilizer 6 is GT03Z intelligent money. The aeration main reaction mechanism 2 is internally provided with a homogenizing aerator 7, a sludge screening device 8 and a sludge pump 9, the homogenizing aerator 7 is a micropore homogenizing aerator, and the sludge screening device 8 is XLT1200LT in model.
The mud discharging pipe 103 in this embodiment is provided with a mud discharging automatic valve group, and the sewage inlet pipe 101 is provided with a water inlet automatic valve group.
The working principle is as follows:
in the embodiment, 1 water inlet buffer pool, 1 biological reaction pool and 1 sludge buffer pool are adopted, wherein the four reaction chambers are all four reaction chambers. The equalizing basin goes out water and at first gets into the buffer pool that intakes, gets into four chamber reaction chambers respectively after the intake pump promotes, and the biological reaction pond is SBR operation mode, and its operation can divide into 3 stages: simultaneously water inlet and outlet stages, an aeration stage and a rapid precipitation stage. Unlike conventional SBR reactors, the water outlet 204 of the aerated main reactor 2 takes the form of a fixed weir outlet, i.e. in the water inlet phase, wastewater enters from the bottom of the reaction chamber 201, so that wastewater treated in the previous cycle can be displaced or "pushed out" of the reaction chamber. After the water is fed, the reaction chamber 201 enters an aeration stage, which is also the main reaction stage of AGS, because the granular sludge is in a spherical layered structure, nitrifying bacteria and nitrosobacteria are mainly attached to the outer side of the granular sludge, ammonia nitrogen is converted into nitrite and nitrate, the nitrite and the nitrate are then transferred into the granular sludge, and simultaneously, an anoxic zone is formed in the granular sludge along with the utilization of oxygen by the external bacteria, the anoxic zone contains denitrifying bacteria, the nitrite nitrogen and the nitrate nitrogen which are transferred in are denitrified and removed, the dephosphorization effect is also enhanced by the structure, after the reaction is finished, the reaction chamber enters a rapid precipitation stage for precipitation, the reacted sewage is pushed out of the reaction chamber 201 by the next batch of sewage, the next flow is entered, and the residual sludge generated by the reaction enters the sludge concentration tank 3. The number of the reaction chambers 201 in the embodiment is two, and the two groups of reaction chambers 201 alternately complete water inlet/drainage, reaction and precipitation processes in sequence; when one group of reaction chambers 201 is in water inlet/water outlet, the other group of reaction chambers 201 completes the reaction and sedimentation processes, and the processes are circularly alternated, so that the removal effect is ensured as much as possible, and the water inlet and outlet continuity of the whole aerobic granular sludge system is ensured.
The simultaneous water intake and water discharge in this embodiment is such that, during the water intake phase, wastewater enters from the bottom of the reaction chamber 201, so that the wastewater treated in the previous cycle can be displaced or "pushed" out of the reaction chamber 201. Unlike SBR systems, AGS technology does not require a separate time consuming drainage phase. More importantly, the use of a static fixed overflow weir replaces the mobile and maintenance intensive decanter commonly used in SBR systems.
The aeration phase in this example is where all biological processes take place. Microbubble aeration creates an oxygen concentration gradient within the granular sludge structure. Organic pollutants are efficiently oxidized at the outermost layer of the granular sludge. Nitrifying bacteria also accumulate on the outer layer of the granules, converting ammonia nitrogen into nitrate. The nitrate produced diffuses into the anoxic layer of the granules to undergo denitrification. In addition, biological phosphorus uptake is also enhanced.
The rapid settling stage in this example is the separation of biomass from the treated wastewater. The settling time required is short due to the excellent settling characteristics of the biomass, and this phase also serves to discharge excess sludge formed as a result of growth and accumulation during the aeration phase.
In the present embodiment, the sludge concentration tank 3 secondarily dehydrates sludge in the stirring chamber 303 and the sedimentation drainage chamber 304 of the main tank 302, and then discharges the sludge from the drainage pipe 306 to the post-reaction sewage storage tank.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (5)
1. A circulation alternating type sludge disposal system based on an aerobic granular sludge SBR reactor comprises: the buffer pool that intakes, SBR reaction tank, the mud buffer pool that communicate in proper order, its characterized in that, SBR reaction tank still includes: a circulation mechanism that is used for SBR reactor simultaneously to advance water and go out water, an aeration main reaction mechanism that is used for SBR reactor continuous treatment sewage, the mud buffer tank still includes: the sludge concentration tank is used for secondary sludge-water separation, the aeration main reaction mechanism is communicated with a sewage inlet pipe through the circulating mechanism, and the sludge concentration tank is communicated with the aeration main reaction mechanism through the circulating mechanism;
the aeration main reaction mechanism comprises: the device comprises an SBR reaction tank consisting of at least one group of reaction chambers, a water inlet positioned at the bottom of the reaction chambers and a water outlet positioned at the top of the reaction chambers, wherein a membrane modularization layer is arranged in the reaction chambers, aerobic granular sludge is arranged in a membrane modularization layer interception tank, the water inlets of the two groups of reaction chambers are connected with a circulation mechanism, the water inlets are positioned below the membrane modularization layer, the water outlet is positioned above the membrane modularization layer, and the water outlet of the reaction chambers is a static fixed overflow weir; the two reaction chambers sequentially and alternately complete water inlet/drainage, reaction and precipitation processes; when one reaction chamber is filled with water/drained, the other reaction chamber completes the reaction and precipitation processes;
the circulation mechanism includes: a sewage inlet pipe communicated with the water inlet buffer tank, a sewage drain pipe connected with the reacted sewage storage tank, a residual sludge discharge pipe communicated with the sludge buffer tank, and an electromagnetic three-way valve arranged on the sewage inlet pipe; the two electromagnetic three-way valves on the sewage inlet pipe are respectively communicated with the water inlets of the two groups of reaction chambers through two groups of pipelines, the electromagnetic control valves are respectively arranged on the branch pipelines, and the sewage drain pipe is communicated with the static fixed overflow weir;
the sludge concentration tank includes: the main tank support, install the main tank body on the main tank support, be located the teeter chamber on main tank body upper portion, be located the sediment drainage chamber of main tank body bottom, main tank body top is provided with the rabbling mechanism who stretches into the teeter chamber, the teeter chamber and sediment drainage chamber intercommunication, sediment drainage chamber is the trapezium structure, there is the outlet sediment drainage chamber bottom, main tank support below is provided with the drain pipe with outlet connection to and drain pump with drain pipe connection, be provided with into mud mouth on the main tank body, go into mud mouth and mud pipe connection.
2. The aerobic granular sludge SBR reactor-based circulation alternation type sludge treatment system as claimed in claim 1, wherein a water inlet pump and a water inlet stabilizer are connected to each of the four sewage inlet pipes.
3. The aerobic granular sludge SBR reactor-based circulation alternation type sludge treatment system as claimed in claim 1, wherein a homogenizing aerator, a sludge screen and a sludge pump are arranged in the aeration main reaction mechanism.
4. The aerobic granular sludge SBR reactor-based circulation alternation type sludge treatment system as claimed in claim 1, wherein the sludge discharge pipe is provided with a sludge discharge automatic valve set, and the sewage inlet pipe is provided with a water inlet automatic valve set.
5. The aerobic granular sludge SBR reactor-based circulation alternation type sludge treatment system as claimed in claim 1, wherein the stirring mechanism is composed of a stirrer arranged on a main tank bracket and a stirring frame arranged on a driving shaft of the stirrer, and the stirring frame is a well-shaped structure composed of two cross beams and two vertical beams.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115259355A (en) * | 2022-07-14 | 2022-11-01 | 清研环境科技股份有限公司 | Continuous aerobic granular sludge screening process and device for same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115259355A (en) * | 2022-07-14 | 2022-11-01 | 清研环境科技股份有限公司 | Continuous aerobic granular sludge screening process and device for same |
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