CN211570249U - Multistage A-O-MBR sewage treatment system of segmentation water intaking - Google Patents
Multistage A-O-MBR sewage treatment system of segmentation water intaking Download PDFInfo
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- CN211570249U CN211570249U CN201922043062.1U CN201922043062U CN211570249U CN 211570249 U CN211570249 U CN 211570249U CN 201922043062 U CN201922043062 U CN 201922043062U CN 211570249 U CN211570249 U CN 211570249U
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Abstract
The utility model discloses a multistage A-O-MBR sewage treatment system with sectional water inlet, which mainly comprises a tank body and a PLC control system; the tank body is divided into an anaerobic tank, a primary aerobic tank, a primary anoxic tank, a secondary aerobic tank, a secondary anoxic tank, a tertiary aerobic tank and a membrane tank in turn by vertical clapboards alternately connected with the top and the bottom of the tank body along the flowing direction of sewage; sewage forms an S-shaped water channel in the tank body; the front end of the tank body is also provided with a self-cleaning filter, the system has good denitrification and dephosphorization effects and can realize automatic control.
Description
Technical Field
The utility model relates to a sewage treatment field especially relates to a multistage A-O-MBR sewage treatment system of segmentation water intaking.
Background
Rural sewage treatment has the problems of wide regions, few sewage collecting and treating systems, backward equipment and the like, untreated domestic sewage is discharged randomly, various pollutants are brought into peripheral water bodies, various water sources are seriously polluted, and the sewage treatment becomes an important pollution source influencing the quality of the water body environment.
In the traditional A2/O process, when the denitrification effect is good, the dephosphorization effect is poor, and vice versa, the good denitrification and dephosphorization effect is difficult to obtain simultaneously. There are therefore many improvements on the market today, such as: and (5) feeding water in stages. The step-feed biological denitrification process belongs to a novel biological denitrification process, has a plurality of advantages, and is developed rapidly in China in recent years, for example:
chinese patent CN104003522B discloses an improved segmented water inlet multi-segment A _ O denitrification system, which has good denitrification effect, but the denitrification effect is mentioned.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects of the prior art and providing a sectional water inlet multistage A-O-MBR sewage treatment system which has good denitrification and dephosphorization effect and can realize automatic control.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
a multistage A-O-MBR sewage treatment system with sectional water inlet mainly comprises a tank body and a PLC control system; the tank body is divided into an anaerobic tank, a primary aerobic tank, a primary anoxic tank, a secondary aerobic tank, a secondary anoxic tank, a tertiary aerobic tank and a membrane tank in turn by vertical clapboards alternately connected with the top and the bottom of the tank body along the flowing direction of sewage; sewage forms an S-shaped water channel in the tank body; the front end of the tank body is also provided with a self-cleaning filter, the water outlet of the self-cleaning filter is connected with a main diversion pipe, the main diversion pipe is provided with a plurality of branch diversion pipes, the branch diversion pipes are respectively connected with the anaerobic tank, the primary anoxic tank and the secondary anoxic tank, and the branch diversion pipes are provided with diversion regulating valves; an MBR membrane component and a reflux pump are arranged in the membrane tank, the reflux pump is connected with a reflux main pipe, a plurality of reflux branch pipes are arranged on the reflux main pipe, the reflux branch pipes are respectively connected with an anaerobic tank, a secondary anoxic tank and a tertiary aerobic tank, and reflux regulating valves are arranged on the reflux branch pipes; the water production port of the MBR membrane module is connected with a water outlet tank through a water production pipe, the water outlet tank is also provided with a back flushing pipe, the back flushing pipe is connected with the water production pipe, the water production pipe is also connected with a dosing pipe, and the dosing pipe is connected with a dosing tank; and the bottom of the side wall of the vertical partition plate is also provided with a flow pushing pump towards the sewage flow direction, and the flow distribution regulating valve, the reflux pump, the reflux regulating valve and the flow pushing pump are all connected with the PLC control system.
Preferably, a dissolved oxygen detector and an ammonia nitrogen online monitor are arranged in the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic tank, and are connected with the PLC control system.
Preferably, the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic tank are internally provided with aeration devices, each aeration device comprises an aeration head and an air inlet pipe, the air inlet pipes are connected with the fans, the air inlet adjusting valves are arranged on the air inlet pipes, and the fans and the air inlet adjusting valves are connected with the PLC control system.
Preferably, a nitrate on-line monitor and a biological filler are arranged in the primary anoxic tank and the secondary anoxic tank, and the nitrate on-line monitor is connected with the PLC control system.
Preferably, biological fillers are also arranged in the anaerobic tank.
Preferably, the backwashing pipe is further provided with a backwashing pump and a backwashing valve, the dosing pipe is further provided with a dosing valve, and the backwashing pump, the backwashing valve and the dosing valve are all connected with the PLC control system.
Preferably, the top parts of the anaerobic tank, the first-stage aerobic tank, the first-stage anoxic tank, the second-stage aerobic tank, the second-stage anoxic tank, the third-stage aerobic tank and the membrane tank are provided with access holes.
The utility model has the advantages that:
firstly, the system has the functions of denitrification and dephosphorization at the same time and has good dephosphorization and denitrification effects due to the arrangement of the anaerobic tank;
secondly, the load of organic matters is distributed more uniformly and reasonably by adopting multi-stage water inflow, so that the COD load of the sludge is flexible and controllable, a carbon source (organic matters) in the sewage is fully utilized, and the denitrification efficiency is improved to the maximum extent; meanwhile, the sectional water inlet can flexibly control, adjust and distribute the water quantity and load of each section according to the conditions of the water inlet quantity, the water quality and the water outlet quality, and has stronger impact load resistance;
thirdly, the activity of the microorganism is high: because the A/O sections are repeatedly alternated, favorable and unfavorable alternative environmental conditions are formed, microorganisms can generate more related enzymes in order to adapt to different environments so as to improve the efficiency of taking nutrition, and the microorganisms enter the favorable environment from the unfavorable environment, have stronger activity and higher efficiency;
fourthly, because of the alternation of A/O, the superior O section provides nitrate for the inferior A section, and the sectional water inlet provides carbon source for the A section, thereby replacing the internal circulation in the traditional A/O process, greatly reducing the energy consumption, fully utilizing the carbon source in the water inlet by the sectional water inlet, and saving the cost of adding the carbon source;
fifthly, the backflow of the mixed liquor in the membrane tank has two functions, namely, the mixed liquor rich in phosphorus flows back to the anaerobic tank to release the phosphorus; secondly, the sludge concentration of each process section is balanced (improved);
fifthly, filamentous fungi are not beneficial to reproduction under the anoxic condition, the growth of the filamentous fungi is eliminated and inhibited through multistage anoxic elimination, and sludge bulking is not easy to occur;
sixthly, the PLC control system is used for controlling various monitors, various regulating valves, pumps and the like in the system, feedback data monitored by the monitors are used for controlling backflow amount, water inflow amount, aeration amount and the like, and the system is fully automatically controlled and is simple to operate;
and seventhly, a flow pushing pump is arranged to adjust the flow rate of sewage according to the sewage condition in each treatment tank.
Drawings
Fig. 1 is a side view of the present invention.
In the figure: 1 is a tank body, 1.1 is a vertical clapboard, 2 is a PLC control system, 3 is an anaerobic tank, 4 is a primary aerobic tank, 5 is a primary anoxic tank, 6 is a secondary aerobic tank, 7 is a secondary anoxic tank, 8 is a tertiary aerobic tank, 9 is a membrane tank, 9.1 is an MBR membrane component, 9.2 is a reflux pump, 10 is a self-cleaning filter, 11 is a main diversion pipe, 11.1 is a branch diversion pipe, 11.2 is a branch diversion regulating valve, 12 is a main reflux pipe, 12.1 is a branch reflux pipe, 12.2 is a reflux regulating valve, 13 is a water production pipe, 14 is a water outlet tank, 15 is a backwashing pipe, 15.1 is a backwashing pump, 15.2 is a backwashing valve, 16 is a dosing pipe, 16.1 is a dosing valve, 17 is a dosing tank, 18 is a propeller pump, 19 is a dissolved oxygen detector, 20 is an ammonia nitrogen online monitor, 21 is an aeration head, 22 is an air inlet pipe, 22.1 is an air inlet regulating valve, 23 is a fan, 24 is a nitrate online monitor, 25 is biological filler, and 26 is an inspection port.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
A multistage A-O-MBR sewage treatment system with sectional water inlet mainly comprises a tank body 1 and a PLC control system 2; the interior of the pool body 1 is sequentially divided into an anaerobic pool 3, a primary aerobic pool 4, a primary anoxic pool 5, a secondary aerobic pool 6, a secondary anoxic pool 7, a tertiary aerobic pool 8 and a membrane pool 9 by vertical clapboards 1.1 alternately connected with the top and the bottom of the pool body 1 along the sewage flow direction; sewage forms an S-shaped water channel in the tank body 1; a self-cleaning filter 10 is further arranged at the front end of the tank body 1, a water outlet of the self-cleaning filter 10 is connected with a main diversion pipe 11, a plurality of branch diversion pipes 11.1 are arranged on the main diversion pipe 11, the branch diversion pipes 11.1 are respectively connected with an anaerobic tank 3, a primary anoxic tank 5 and a secondary anoxic tank 7, and branch diversion regulating valves 11.2 are arranged on the branch diversion pipes 11.1; an MBR membrane module 9.1 and a reflux pump 9.2 are arranged in the membrane tank 9, the reflux pump 9.2 is connected with a reflux main pipe 12, a plurality of reflux branch pipes 12.1 are arranged on the reflux main pipe 12, the reflux branch pipes 12.1 are respectively connected with an anaerobic tank 3, a second-stage anoxic tank 7 and a third-stage aerobic tank 8, and reflux regulating valves 12.2 are arranged on the reflux branch pipes 12.1; the water production port of the MBR membrane module 9.1 is connected with a water outlet tank 14 through a water production pipe 13, the water outlet tank 14 is also provided with a back flushing pipe 15, the back flushing pipe 15 is connected with a water production pipe, the water production pipe 13 is also connected with a dosing pipe 16, and the dosing pipe 16 is connected with a dosing tank 17; the bottom of the side wall of the vertical partition board 1.1 is also provided with a flow pushing pump 18 towards the sewage flow direction, and the flow dividing regulating valve 11.2, the reflux pump 9.2, the reflux regulating valve 12.2 and the flow pushing pump 18 are arranged
Are all connected with the PLC control system 2 (not shown in the figure).
Preferably, a dissolved oxygen detector 19 and an ammonia nitrogen on-line monitor 20 are arranged in the first-stage aerobic tank 4, the second-stage aerobic tank 6 and the third-stage aerobic tank 8, and the dissolved oxygen detector 19 and the ammonia nitrogen on-line monitor 20 are connected with the PLC control system 2 (not shown in the figure).
Preferably, the primary aerobic tank 4, the secondary aerobic tank 6 and the tertiary aerobic tank 8 are also provided with aeration devices, each aeration device comprises an aeration head 21 and an air inlet pipe 22, the air inlet pipe 22 is connected with a fan 23, the air inlet pipe 22 is provided with an air inlet regulating valve 22.1, and the fan 23 and the air inlet regulating valve 22.1 are both connected with the PLC control system 2 (not shown in the figure).
Preferably, a nitrate on-line monitor 24 and a biological filler 25 are arranged in the primary anoxic tank 5 and the secondary anoxic tank 7, and the nitrate on-line monitor 24 is connected with the PLC control system 2 (not shown in the figure).
Preferably, a biological filler 25 is also arranged in the anaerobic tank 3.
Preferably, the back flushing pipe 15 is further provided with a back flushing pump 15.1 and a back flushing valve 15.2, the dosing pipe 16 is further provided with a dosing valve 16.1, and the back flushing pump 15.1, the back flushing valve 15.2 and the dosing valve 16.1 are all connected with the PLC control system 2 (not shown in the figure).
Preferably, the tops of the anaerobic tank 3, the primary aerobic tank 4, the primary anoxic tank 5, the secondary aerobic tank 6, the secondary anoxic tank 7, the tertiary aerobic tank 8 and the membrane tank 9 are all provided with access holes 26.
The working principle of the system is as follows:
1. sewage enters a self-cleaning filter 10 through a lifting pump, the filtering precision of the self-cleaning filter 10 is 1mm, the self-cleaning filter 10 is used for removing coarse particle suspended matters in the sewage and protecting an MBR (membrane bioreactor) membrane component 9.1 from being damaged, effluent enters a subsequent process, and filter residues are discharged into a sludge disposal unit through an automatic sludge discharge valve self-matched with the self-cleaning filter 10;
2. the self-cleaning filter 10 is used for treating the effluent to enter each water inlet point of biochemical treatment, and the water inlet is in a sectional water inlet mode; the water inlet points are respectively an anaerobic tank 3, a primary anoxic tank 5 and a secondary anoxic tank 7; the load of organic matters is distributed more uniformly and reasonably by stage water inflow, so that the sludge COD load is flexible and controllable, carbon sources (organic matters) in sewage are fully utilized, and the denitrification efficiency is improved to the maximum extent; the sectional water inlet can flexibly control, adjust and distribute the water quantity and load of each section according to the conditions of the water inlet quantity, the water quality and the water outlet quality, has stronger shock load resistance, and the adjustment of the water inlet quantity is realized by the PLC control system 2 through controlling the flow dividing adjusting valve 11.2;
3. after entering the anaerobic tank 3, the sewage is mixed with the returned mixed liquor of the membrane tank 9, the phosphorus-accumulating bacteria in the mixed liquor suspended sludge of the membrane tank 9 absorbs low-molecular organic matters in the anaerobic tank 3 and releases phosphorus, and the influence of nitrate nitrogen on the phosphorus-accumulating bacteria released phosphorus in the anaerobic tank is reduced because the mixed liquor of the membrane tank 9 returns from the most biochemical tail end and the nitrate nitrogen concentration is lower; the backflow of the mixed liquor in the membrane tank 9 has two functions, namely, the mixed liquor rich in phosphorus flows back to the anaerobic tank 3 to release the phosphorus; secondly, the sludge concentration of each process section is balanced (improved);
4. in the first-stage anoxic tank 5, denitrifying bacteria perform denitrification by using an organic carbon source in the inlet water and nitrate nitrogen flowing out of the first-stage aerobic tank 4 to reduce the nitrate nitrogen into nitrogen, and a combined biological filler 25 is arranged in the first-stage anoxic tank 5 to facilitate the growth and reproduction of microorganisms;
5. the working principle of the sewage in the secondary anoxic tank 7 is the same as that in the primary anoxic tank 5;
6. aerobic microorganisms in the first-stage aerobic tank 4, the second-stage aerobic tank 6 and the third-stage aerobic tank 8 remove part of nitrogen of organic pollutants in the wastewater through anabolism; the ammonia nitrogen in the wastewater is converted into nitrite nitrogen and nitrate nitrogen under the combined action of nitrifying bacteria and nitrosobacteria;
7. an MBR membrane module 9.1 is arranged in the membrane tank 9; discharging the produced water of the MBR membrane module 9.1 into a water outlet tank 14;
8. the water outlet tank 14 is used for storing effluent water of the MBR membrane module 9.1, and the effluent water is discharged into a discharge pipeline if the effluent water meets the discharge requirement, and the effluent water reflows to the front end for retreatment if the effluent water does not meet the discharge requirement; the water outlet tank 14 is simultaneously used as a backwashing water tank of the MBR membrane module 9.1 to carry out necessary backwashing on the membrane according to the process setting and the operation condition;
9. the dissolved oxygen detector 19 detects the dissolved oxygen in the first-stage aerobic tank 4, the second-stage aerobic tank 6 and the third-stage aerobic tank 8, and provides a feedback signal for the PLC control system 2 so as to control the air inflow of the air inlet regulating valve 22.1;
10. the ammonia nitrogen on-line monitor 20 monitors the ammonia nitrogen concentration in the primary aerobic tank 4, the secondary aerobic tank 6 and the tertiary aerobic tank 8, and provides a feedback signal for the PLC control system 2 so as to control the water inflow of the primary aerobic tank 4, the secondary aerobic tank 6 and the tertiary aerobic tank 8;
11. the nitrate on-line monitor 24 detects nitrate nitrogen concentrations in the primary anoxic tank 5 and the secondary anoxic tank 7, and provides feedback signals for the PLC control system 2 so as to control water inflow of the primary anoxic tank 5 and the secondary anoxic tank 7.
The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (7)
1. A multistage A-O-MBR sewage treatment system with sectional water inlet mainly comprises a tank body and a PLC control system; the method is characterized in that: the tank body is divided into an anaerobic tank, a primary aerobic tank, a primary anoxic tank, a secondary aerobic tank, a secondary anoxic tank, a tertiary aerobic tank and a membrane tank in turn by vertical clapboards alternately connected with the top and the bottom of the tank body along the flowing direction of sewage; sewage forms an S-shaped water channel in the tank body; the front end of the tank body is also provided with a self-cleaning filter, the water outlet of the self-cleaning filter is connected with a main diversion pipe, the main diversion pipe is provided with a plurality of branch diversion pipes, the branch diversion pipes are respectively connected with the anaerobic tank, the primary anoxic tank and the secondary anoxic tank, and the branch diversion pipes are provided with diversion regulating valves; an MBR membrane component and a reflux pump are arranged in the membrane tank, the reflux pump is connected with a reflux main pipe, a plurality of reflux branch pipes are arranged on the reflux main pipe, the reflux branch pipes are respectively connected with an anaerobic tank, a secondary anoxic tank and a tertiary aerobic tank, and reflux regulating valves are arranged on the reflux branch pipes; the water production port of the MBR membrane module is connected with a water outlet tank through a water production pipe, the water outlet tank is also provided with a back flushing pipe, the back flushing pipe is connected with the water production pipe, the water production pipe is also connected with a dosing pipe, and the dosing pipe is connected with a dosing tank; and the bottom of the side wall of the vertical partition plate is also provided with a flow pushing pump towards the sewage flow direction, and the flow distribution regulating valve, the reflux pump, the reflux regulating valve and the flow pushing pump are all connected with the PLC control system.
2. The staged influent multi-stage a-O-MBR wastewater treatment system of claim 1, wherein: the system is characterized in that a dissolved oxygen detector and an ammonia nitrogen on-line monitor are arranged in the primary aerobic tank, the secondary aerobic tank and the tertiary aerobic tank, and are connected with a PLC control system.
3. The staged influent multi-stage a-O-MBR wastewater treatment system of claim 1 or 2, wherein: the aeration device comprises an aeration head and an air inlet pipe, the air inlet pipe is connected with a fan, an air inlet adjusting valve is arranged on the air inlet pipe, and the fan and the air inlet adjusting valve are connected with a PLC control system.
4. The staged influent multi-stage a-O-MBR wastewater treatment system of claim 1, wherein: and the first-stage anoxic tank and the second-stage anoxic tank are internally provided with a nitrate on-line monitor and a biological filler, and the nitrate on-line monitor is connected with the PLC control system.
5. The staged influent multi-stage a-O-MBR wastewater treatment system of claim 1, wherein: and biological fillers are also arranged in the anaerobic tank.
6. The staged influent multi-stage a-O-MBR wastewater treatment system of claim 1, wherein: the back washing pipe is also provided with a back washing pump and a back washing valve, the dosing pipe is also provided with a dosing valve, and the back washing pump, the back washing valve and the dosing valve are all connected with the PLC control system.
7. The staged influent multi-stage a-O-MBR wastewater treatment system of claim 1, wherein: and the tops of the anaerobic tank, the first-stage aerobic tank, the first-stage anoxic tank, the second-stage aerobic tank, the second-stage anoxic tank, the third-stage aerobic tank and the membrane tank are provided with access holes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922043062.1U CN211570249U (en) | 2019-11-25 | 2019-11-25 | Multistage A-O-MBR sewage treatment system of segmentation water intaking |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922043062.1U CN211570249U (en) | 2019-11-25 | 2019-11-25 | Multistage A-O-MBR sewage treatment system of segmentation water intaking |
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| CN211570249U true CN211570249U (en) | 2020-09-25 |
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| CN201922043062.1U Active CN211570249U (en) | 2019-11-25 | 2019-11-25 | Multistage A-O-MBR sewage treatment system of segmentation water intaking |
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