CN220132006U - Oxygen management system based on landfill leachate short-cut nitrification - Google Patents
Oxygen management system based on landfill leachate short-cut nitrification Download PDFInfo
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- CN220132006U CN220132006U CN202321499672.2U CN202321499672U CN220132006U CN 220132006 U CN220132006 U CN 220132006U CN 202321499672 U CN202321499672 U CN 202321499672U CN 220132006 U CN220132006 U CN 220132006U
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- 239000001301 oxygen Substances 0.000 title claims abstract description 133
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 133
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 52
- 239000007789 gas Substances 0.000 claims abstract description 79
- 238000005273 aeration Methods 0.000 claims abstract description 57
- 230000001105 regulatory effect Effects 0.000 claims abstract description 50
- 238000011282 treatment Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 30
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 238000010992 reflux Methods 0.000 claims abstract description 19
- 239000012528 membrane Substances 0.000 claims description 39
- 230000005540 biological transmission Effects 0.000 claims description 29
- 238000000108 ultra-filtration Methods 0.000 claims description 27
- 238000005276 aerator Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009935 nitrosation Effects 0.000 abstract description 3
- 238000007034 nitrosation reaction Methods 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- QALQXPDXOWOWLD-UHFFFAOYSA-N [N][N+]([O-])=O Chemical compound [N][N+]([O-])=O QALQXPDXOWOWLD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011221 initial treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 150000002829 nitrogen Chemical class 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to an oxygen management system based on landfill leachate short-cut nitrification, which comprises a treatment tank, monitoring equipment and aeration equipment, wherein the treatment tank is connected with the monitoring equipment; the treatment tank comprises a primary anoxic tank, a primary micro-aerobic tank and a reflux pump, wherein the primary anoxic tank is communicated with the primary micro-aerobic tank so as to be capable of conveying the treated solution to the primary micro-aerobic tank, and the reflux pump is communicated with the primary anoxic tank and the primary micro-aerobic tank; the monitoring equipment comprises a primary dissolved oxygen meter, a primary ammonia nitrogen meter and a primary nitrate nitrogen meter; the aeration equipment comprises an aeration fan, a primary gas pipeline and a primary regulating valve. The dissolved oxygen set value can be adjusted in real time to implement accurate aeration, and on the basis of ensuring that organic matters and ammonia nitrogen are stably removed and reach the standard, the dissolved oxygen value is properly reduced, so that excessive aeration is effectively prevented, the micro-aerobic environment for the dominant growth of the nitrosation flora and the short-cut nitrification and denitrification efficiency of the dominant flora in dynamic water quality are ensured, the total nitrogen removal rate is improved, and the energy saving and consumption reduction effects are improved.
Description
Technical Field
The utility model relates to the technical field of landfill leachate treatment, in particular to an oxygen management system based on landfill leachate short-cut nitrification.
Background
The short-cut nitrification and denitrification process is to control the nitrification process in the traditional biological denitrification theory in the phase of nitrite, prevent nitrite from further nitrifying, and then directly perform denitrification to produce nitrogen. Aiming at the water quality characteristics of the landfill leachate and the problems existing in the traditional biological denitrification process, the short-cut nitrification and denitrification process is regarded as a novel high-efficiency denitrification process, and has the advantages of saving the nitrification aeration, the carbon source and the volume of a nitrification reactor, reducing the sludge yield, preventing secondary pollution and the like in the treatment of the landfill leachate.
For example, patent CN 217535599U discloses a short-cut nitrification and denitrification reaction apparatus, which adds sewage to an aerobic reactor through a water inlet pipe, the aerobic reactor is used for performing a nitrification reaction on the sewage, an aerator is started to aerate the inside of the aerobic reactor, and then a pressure pump between the aerobic reactor and an anoxic reactor is started so that the sewage enters the anoxic reactor, and the anoxic reactor is used for performing a denitrification reaction on the sewage to achieve denitrification.
However, the micro-aerobic environment is considered to promote the accumulation of nitrite and nitrogen salt, and in actual operation, the landfill leachate raw water has the characteristic of larger fluctuation of water quality and water quantity, and insufficient nitrification reaction in an aeration tank is easily caused when biochemical aeration is insufficient, so that the effluent quality exceeds the standard; otherwise, when the aeration is excessive, the nitrate nitrogen in the aeration tank cannot be controlled in the nitrite stage, and the denitrification effect is poor due to the fact that the oxygen content in the nitrate nitrogen reflux is too high, so that more energy consumption is wasted finally. However, the above patent does not disclose an oxygen content control apparatus, so that there is a need to develop an oxygen management system based on short-cut nitrification of landfill leachate so as to be able to control the oxygen content in the micro-oxygen tank in real time.
Disclosure of Invention
In view of the foregoing, it is necessary to provide an oxygen management system based on short-cut nitrification of landfill leachate, so as to solve the technical problem that no oxygen content control device is disclosed in the prior art, and it is needed to develop an oxygen management system based on short-cut nitrification of landfill leachate, so as to be capable of controlling the oxygen content in the micro-oxygen tank in real time.
The utility model provides an oxygen management system based on short-cut nitrification of landfill leachate, which comprises:
the treatment tank comprises a primary anoxic tank, a primary micro-aerobic tank and a reflux pump, wherein the primary anoxic tank is communicated with the primary micro-aerobic tank so as to be capable of conveying a treated solution to the primary micro-aerobic tank, and the reflux pump is communicated with the primary anoxic tank and the primary micro-aerobic tank and is used for refluxing a short-nitrified solution in the primary micro-aerobic tank to the primary anoxic tank;
the monitoring equipment comprises a primary dissolved oxygen meter, a primary ammonia nitrogen meter and a primary nitrate nitrogen meter which are used for monitoring corresponding parameters of the solution in the primary micro-oxygen tank; and
the aeration equipment comprises an aeration fan, a primary gas pipeline and a primary regulating valve, wherein one end of the primary gas pipeline is connected with the aeration fan, the other end of the primary gas pipeline stretches into the primary micro-oxygen tank, the primary regulating valve is arranged on the primary gas pipeline, and the primary regulating valve is used for regulating the gas supply flow of the primary gas pipeline according to the monitoring data of the primary dissolved oxygen meter, the primary ammonia nitrogen meter and the primary nitrate nitrogen meter.
Optionally, a primary gas flowmeter is further arranged on the primary gas pipeline; and/or the number of the groups of groups,
a primary mixer is arranged in the primary anoxic tank; and/or the number of the groups of groups,
one end of the primary gas pipeline extending into the primary micro-oxygen tank is provided with a primary aerator.
Optionally, the treatment tank further comprises a secondary anoxic tank and a secondary micro-aerobic tank, wherein the secondary anoxic tank is communicated with the primary micro-aerobic tank and the secondary micro-aerobic tank, and is used for accommodating the solution treated in the primary micro-aerobic tank and conveying the solution treated by the treatment tank to the secondary micro-aerobic tank;
the monitoring equipment further comprises a secondary dissolved oxygen meter, a secondary ammonia nitrogen meter, a secondary nitrate nitrogen meter and a liquid level meter, wherein the secondary dissolved oxygen meter, the secondary ammonia nitrogen meter, the secondary nitrate nitrogen meter and the liquid level meter are used for monitoring corresponding parameters of the solution in the secondary micro-oxygen tank;
the aeration equipment further comprises a secondary gas transmission pipeline, one end of the secondary gas transmission pipeline is connected with the aeration fan, the other end of the secondary gas transmission pipeline stretches into the secondary micro-oxygen tank, a secondary regulating valve is arranged on the secondary gas transmission pipeline and is used for regulating the gas transmission flow according to the monitoring data of the secondary dissolved oxygen meter, the secondary ammonia nitrogen meter and the secondary nitrate nitrogen meter.
Optionally, the oxygen management system based on landfill leachate short-cut nitrification further comprises an ultrafiltration membrane system, wherein the ultrafiltration membrane system is respectively connected with the secondary micro-oxygen tank and the primary anoxic tank, is used for filtering a solution processed in the secondary micro-oxygen tank and can convey a mud-water mixture trapped by the solution to the primary anoxic tank.
Optionally, a first lifting pipeline is arranged between the ultrafiltration membrane system and the secondary micro-oxygen tank, and a first lifting pump is arranged on the first lifting pipeline and used for lifting the solution treated in the secondary micro-oxygen tank to the ultrafiltration membrane system.
Optionally, the oxygen management system based on landfill leachate short-cut nitrification further comprises a membrane advanced treatment system, wherein the membrane advanced treatment system is communicated with the ultrafiltration membrane system and is used for deeply purifying the solution conveyed by the ultrafiltration membrane system and discharging the solution after purification.
Optionally, the aeration equipment further comprises a gas transmission main pipe, and a pressure instrument for monitoring gas transmission pressure is arranged on the gas transmission main pipe;
the primary gas pipeline and the secondary gas pipeline are respectively communicated with the gas transmission main pipe.
Optionally, a secondary gas flowmeter is further arranged on the secondary gas pipeline; and/or the number of the groups of groups,
a secondary stirrer is arranged in the secondary anoxic tank; and/or the number of the groups of groups,
and a secondary aerator is arranged at one end of the secondary gas pipeline extending into the secondary micro-oxygen tank.
Optionally, the oxygen management system based on landfill leachate short-cut nitrification further comprises a regulating tank, a regulating stirrer is arranged in the regulating tank, a second lifting pipeline is arranged between the regulating tank and the primary anoxic tank, and a second lifting pump is arranged on the second lifting pipeline and used for lifting the solution in the regulating tank into the primary anoxic tank.
Optionally, the oxygen management system based on landfill leachate short-cut nitrification further comprises an anaerobic reactor, wherein the anaerobic reactor is communicated with the regulating tank and the primary anoxic tank and is positioned between the second lifting pump and the primary anoxic tank.
Compared with the prior art, in the oxygen management system based on short-cut nitrification of landfill leachate, after the landfill leachate enters a primary anoxic tank, the high-efficiency denitrification of nitrate nitrogen substances and reflux nitrite nitrogen substances is completed by utilizing an organic carbon source in raw water; and then, the landfill leachate after preliminary treatment in the primary anoxic tank is conveyed to the primary micro-aerobic tank, and corresponding parameters of the landfill leachate in the micro-aerobic tank can be monitored in real time through the primary dissolved oxygen meter, the primary ammonia nitrogen meter and the primary nitrate nitrogen meter at the moment, so that the primary regulating valve can regulate and control the air flow conveyed to the primary micro-aerobic tank by means of the related parameters so as to control the content of dissolved oxygen in the micro-aerobic tank. In addition, the landfill leachate realizes short-cut nitrification in the primary micro-oxygen tank so as to convert ammonia nitrogen into nitrite nitrogen substances, and then the ammonia nitrogen can flow back to the primary anoxic tank under the driving of the reflux pump, so that the landfill leachate after short-cut nitrification is subjected to denitrification, and the total nitrogen content is reduced.
Therefore, the oxygen management system based on short-cut nitrification of landfill leachate can dynamically analyze and calculate according to the sewage water quality parameters, adjust the dissolved oxygen set value in real time so as to implement accurate aeration, properly reduce the dissolved oxygen value on the basis of ensuring that organics and ammonia nitrogen are stably removed and reach the standard, effectively prevent excessive aeration, simultaneously ensure the micro-oxygen environment for the dominant growth of nitrosation flora and the short-cut nitrification denitrification efficiency of the dominant flora in the dynamic water quality, improve the total nitrogen removal rate, and improve the energy saving and consumption reduction effects.
The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and its details set forth in the accompanying drawings. Specific embodiments of the present utility model are given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain the principles of the utility model. In the drawings: illustrative embodiments of the utility model and their description are for the purpose of explaining the utility model and are not to be construed as
FIG. 1 is a schematic diagram of an embodiment of an oxygen management system based on short-cut nitrification of landfill leachate according to the present utility model;
FIG. 2 is a schematic diagram of the treatment tank, ultrafiltration membrane system, and membrane depth treatment system of FIG. 1;
fig. 3 is a schematic structural view of the monitoring apparatus and the aeration apparatus in fig. 1.
Reference numerals illustrate:
100. an oxygen management system based on short-cut nitrification of landfill leachate; 1. a treatment pool; 11. a primary anoxic pond; 111. a primary mixer; 12. a primary micro-oxygen tank; 13. a return line; 14. a reflux pump; 15. a secondary anoxic tank; 151. a secondary mixer; 16. a secondary micro-oxygen tank; 2. monitoring equipment; 21. a first stage dissolved oxygen meter; 22. a primary ammonia nitrogen instrument; 23. a primary nitronitrogen instrument; 24. a secondary dissolved oxygen meter; 25. a secondary ammonia nitrogen instrument; 26. a secondary nitronitrogen instrument; 27. a liquid level gauge; 3. an aeration device; 31. an aeration fan; 32. a primary gas pipeline; 321. a primary aerator; 33. a primary regulating valve; 34. a primary gas flow meter; 35. a secondary gas pipeline; 351. a secondary aerator; 36. a secondary regulating valve; 37. a gas transmission main pipe; 371. a pressure gauge; 38. a secondary gas flow meter; 4. an ultrafiltration membrane system; 5. a first lifting pipe; 51. a first lift pump; 6. a membrane depth treatment system; 7. an adjusting tank; 71. a second lifting pipe; 72. a second lift pump; 8. an anaerobic reactor; 9. and a control cabinet.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
Referring to fig. 1 to 3, the present oxygen management system 100 based on short-cut nitrification of landfill leachate includes a treatment tank 1, a monitoring device 2 and an aeration device 3; the treatment tank 1 comprises a primary anoxic tank 11, a primary micro-aerobic tank 12 and a reflux pump 14, wherein the primary anoxic tank 11 is communicated with the primary micro-aerobic tank 12 so as to be capable of conveying a solution treated by the primary anoxic tank to the primary micro-aerobic tank 12, and the reflux pump 14 is communicated with the primary anoxic tank 11 and the primary micro-aerobic tank 12 and is used for refluxing a solution subjected to short nitrification in the primary micro-aerobic tank 12 to the primary anoxic tank 11; the monitoring equipment 2 comprises a primary dissolved oxygen meter 21, a primary ammonia nitrogen meter 22 and a primary nitrate nitrogen meter 23 which are used for monitoring corresponding parameters of the solution in the primary micro-oxygen tank 12; the aeration device 3 comprises an aeration fan 31, a primary gas transmission pipeline 32 and a primary regulating valve 33, wherein one end of the primary gas transmission pipeline 32 is connected with the aeration fan 31, the other end of the primary gas transmission pipeline extends into the primary micro-oxygen tank 12, the primary regulating valve 33 is arranged on the primary gas transmission pipeline 32, and the primary regulating valve 33 is used for regulating the gas transmission flow according to the monitoring data of the primary dissolved oxygen meter 21, the primary ammonia nitrogen meter 22 and the primary nitrate nitrogen meter 23. Specifically, a return pipe 13 is provided between the primary micro-oxygen tank 12 and the primary anoxic tank 11, wherein a return pump 14 is provided on the return pipe 13.
In the oxygen management system 100 based on short-cut nitrification of landfill leachate, after the landfill leachate enters the primary anoxic tank 11, the high-efficiency denitrification of nitrate nitrogen substances and reflux nitrite nitrogen substances is completed by utilizing an organic carbon source in raw water; and then the landfill leachate after primary treatment in the primary anoxic tank 11 is conveyed to the primary micro-aerobic tank 12, and corresponding parameters of the landfill leachate in the micro-aerobic tank can be monitored in real time through the primary dissolved oxygen meter 21, the primary ammonia nitrogen meter 22 and the primary nitrate nitrogen meter 23, so that the primary regulating valve 33 can regulate and control the air flow conveyed to the primary micro-aerobic tank 12 by means of the related parameters so as to control the dissolved oxygen content in the micro-aerobic tank. In addition, the landfill leachate realizes short-cut nitrification in the primary micro-oxygen tank 12 so as to convert ammonia nitrogen into nitrite nitrogen substances, and then the nitrite nitrogen substances can be driven by the reflux pump 14 to flow back to the primary anoxic tank 11 through the reflux pipeline 13, so that the landfill leachate after short-cut nitrification is subjected to denitrification, and the total nitrogen content is reduced.
Thus, the oxygen management system 100 based on short-cut nitrification of landfill leachate can dynamically analyze and calculate according to the sewage water quality parameters, adjust the dissolved oxygen set value in real time so as to implement accurate aeration, properly reduce the dissolved oxygen value on the basis of ensuring that organics and ammonia nitrogen are stably removed and reach the standard, effectively prevent excessive aeration, simultaneously ensure the micro-oxygen environment for the dominant growth of nitrosation flora and the short-cut nitrification denitrification efficiency of the dominant flora in the dynamic water quality, improve the total nitrogen removal rate, and improve the energy saving and consumption reduction effects.
It should be noted that, the mode that the landfill leachate in the first-stage anoxic tank 11 enters the first-stage micro-aerobic tank 12 after preliminary treatment is not limited, and a material conveying pipeline is further arranged between the first-stage anoxic tank 11 and the first-stage micro-aerobic tank 12, and a material conveying pump is arranged on the material conveying pipeline and is used for inputting the landfill leachate in the first-stage anoxic tank 11 into the first-stage micro-aerobic tank 12 after preliminary treatment, or in other forms.
In addition, in the present embodiment, the primary regulating valve 33 is an electric linear air regulating valve, the regulating valve has a linear working characteristic, a venturi theoretical design is adopted inside, and high-precision and repeatable air conditioning and control of 0-100% are realized under the condition of extremely low pressure loss, so that the control efficiency of operation energy consumption is improved. The control valve can reasonably distribute and accurately control aeration gas according to the actual gas demand of each region, thereby reducing the energy consumption of the whole operation.
In addition, the primary dissolved oxygen meter 21, the primary ammonia nitrogen meter 22 and the primary nitrate nitrogen meter 23 are adopted as the prior art, and will not be described herein. It should be understood that the primary dissolved oxygen meter 21, the primary ammonia nitrogen meter 22 and the primary nitrate nitrogen meter 23 can be electrically connected with the control cabinet 9, and the control cabinet 9 is also electrically connected with the primary regulating valve 33, so as to adjust the dissolved oxygen content in the primary micro-oxygen tank 12 in real time.
Further, the primary gas pipeline 32 is further provided with a primary gas flow meter 34, and specifically, in this embodiment, the primary gas flow meter 34 is a coriolis gas flow meter. In addition, a primary stirrer 111 is arranged in the primary anoxic tank 11, so that landfill leachate can be uniformly distributed in the primary anoxic tank 11, and the denitrification rate is improved. In addition, one end of the primary gas transmission pipeline 32 extending into the primary micro-oxygen tank 12 is provided with a primary aerator 321, so that short-distance nitrification and removal of organic matters of the landfill leachate in the primary micro-oxygen tank 12 are realized.
Further, the treatment tank 1 further comprises a secondary anoxic tank 15 and a secondary micro-aerobic tank 16, wherein the secondary anoxic tank 15 is communicated with the primary micro-aerobic tank 12 and the secondary micro-aerobic tank 16, and is used for containing the solution treated in the primary micro-aerobic tank 12 and delivering the solution treated by the treatment tank to the secondary micro-aerobic tank 16; the monitoring equipment 2 further comprises a secondary dissolved oxygen meter 24, a secondary ammonia nitrogen meter 25, a secondary nitrate nitrogen meter 26 and a liquid level meter 27, which are used for monitoring corresponding parameters of the solution in the secondary micro-oxygen tank 16; the aeration device 3 further comprises a secondary gas pipeline 35, one end of the secondary gas pipeline 35 is connected with the aeration fan 31, the other end of the secondary gas pipeline 35 stretches into the secondary micro-oxygen tank 16, a secondary regulating valve 36 is arranged on the secondary gas pipeline 35, and the secondary regulating valve 36 is used for regulating the gas flow according to the monitoring data of the secondary dissolved oxygen meter 24, the secondary ammonia nitrogen meter 25 and the secondary nitrate nitrogen meter 26.
Therefore, the set values of the dissolved oxygen in the primary micro-oxygen tank 12 and the secondary micro-oxygen tank 16 can be adjusted in real time according to the collection dynamic analysis and calculation of the sewage water quality parameters, and the dissolved oxygen values of the primary micro-oxygen tank 12 and the secondary micro-oxygen tank 16 are properly reduced on the basis that the organic matters and ammonia nitrogen in the primary micro-oxygen tank 12 and the secondary micro-oxygen tank 16 are stably removed and reach the standard, so that the excessive aeration of each micro-oxygen tank is effectively prevented. And when the process operation and the on-site sewage treatment equipment normally operate, the actual concentration value of the dissolved oxygen in the primary micro-oxygen tank 12 and the secondary micro-oxygen tank 16 can be generally controlled to be +/-0.3 mg/L of a target set value, and the control precision is high. In addition, under the condition of equal water quality of water inlet and outlet, the energy consumption of the aeration fan 31 can be reduced by more than 10 percent compared with the energy consumption in a manual operation state. In the present embodiment, the secondary regulator valve 36 is also an electric linear regulator valve.
Furthermore, the oxygen management system 100 based on short-cut nitrification of landfill leachate further comprises an ultrafiltration membrane system 4, wherein the ultrafiltration membrane system 4 is respectively connected with the secondary micro-oxygen tank 16 and the primary anoxic tank 11, and is used for filtering the solution processed in the secondary micro-oxygen tank 16 and delivering the mud-water mixture trapped by the solution to the primary anoxic tank 11. Specifically, further, a first lifting pipeline 5 is arranged between the ultrafiltration membrane system 4 and the secondary micro-oxygen tank 16, and a first lifting pump 51 is arranged on the first lifting pipeline 5 and is used for lifting the solution processed in the secondary micro-oxygen tank 16 to the ultrafiltration membrane system 4. In addition, the start and stop of the first lift pump 51 can be controlled by the liquid level meter 27 in a linkage manner, so that the flow rate of the solution entering the ultrafiltration membrane system 4 can be controlled, and the pressure loss change and the running state of the aerator can be calculated and evaluated by long-term comparison of the liquid level of the water tank and the online pressure of the air pipe.
Specifically, the oxygen management system 100 based on short-cut nitrification of landfill leachate further comprises a membrane advanced treatment system 6, wherein the membrane advanced treatment system 6 is communicated with the ultrafiltration membrane system 4, and is used for deeply purifying the solution conveyed by the ultrafiltration membrane system 4 and discharging the solution after purification. In this way, the solution in the secondary micro-oxygen tank 16 can be lifted into the ultrafiltration membrane system 4 through the first lifting pump 51 to carry out mud-water separation, and the filtered produced water enters the subsequent membrane advanced treatment system 6 for further advanced treatment, so that the produced water can reach the discharge standard after purification; and the mud-water mixture intercepted by the ultrafiltration membrane system 4 returns to the primary anoxic tank 11 to strengthen denitrification, so that the total nitrogen removal rate of the system is improved. It should be noted that, the ultrafiltration membrane system 4 and the membrane advanced treatment system 6 are related art, and are not described herein.
Further, the aeration equipment 3 further comprises a gas transmission main pipe 37, and a pressure instrument 371 for monitoring gas transmission pressure is arranged on the gas transmission main pipe 37; wherein, the first-stage gas pipeline 32 and the second-stage gas pipeline 35 are respectively communicated with the gas transmission main pipe 37 so as to accurately adjust the aeration flow.
Further, a secondary gas flow meter 38 is also provided on the secondary gas pipe 35. In addition, a secondary agitator 151 is provided in the secondary anoxic tank 15 to facilitate uniform reaction in the secondary anoxic tank 15. In addition, a secondary aerator 351 is provided at one end of the secondary gas pipe 35 extending into the secondary micro-oxygen tank 16.
Further, the oxygen management system 100 based on short-cut nitrification of landfill leachate further comprises a regulating tank 7, a regulating stirrer is arranged in the regulating tank 7, a second lifting pipeline 71 is arranged between the regulating tank 7 and the primary anoxic tank 11, and a second lifting pump 72 is arranged on the second lifting pipeline 71 and used for lifting the solution of the regulating tank 7 into the primary anoxic tank 11. Thus, the effect of uniform water quality and quantity can be achieved through the regulating tank 7. Still further, the landfill leachate shortcut nitrification-based oxygen management system 100 further includes an anaerobic reactor 8, and the anaerobic reactor 8 is communicated with the adjusting tank 7 and the primary anoxic tank 11 and is located between the second lift pump 72 and the primary anoxic tank 11. In this example, the anaerobic reactor 8 performs anaerobic treatment on the percolate, and mainly decomposes macromolecular organic substances in the sewage into small molecular organic substances. The anaerobic reactor 8 is a prior art, and will not be described in detail here.
Based on the above embodiment, the specific process flow of the oxygen management system 100 based on short-cut nitrification of landfill leachate provided by the utility model is as follows:
regulating tank 7, anaerobic reactor 8, primary anoxic tank 11, primary micro-anoxic tank 12, secondary anoxic tank 15, secondary micro-anoxic tank 16, ultrafiltration membrane system 4, membrane advanced treatment system 6 and standard discharge; wherein, the percolate in the primary micro-oxygen tank 12 can flow back to the primary anoxic tank 11, and the mud-water mixture trapped by the ultrafiltration membrane system 4 can return to the primary anoxic tank 11.
Specifically, the regulating tank 7 plays a role in uniformly mixing water quality and water quantity; the garbage percolate enters an adjusting tank 7 and then enters an anaerobic reactor 8 through a second lifting pump 72, and the anaerobic reactor 8 carries out anaerobic treatment on the percolate, so that macromolecular organic matters in sewage are mainly decomposed into micromolecular organic matters; the anaerobic effluent sequentially enters a primary anoxic tank 11, a primary micro-anoxic tank 12, a secondary anoxic tank 15 and a secondary micro-anoxic tank 16, wherein the primary anoxic tank 11 and the secondary anoxic tank 15 are mainly subjected to denitrification, the total nitrogen content is reduced, and a primary stirrer 111 and a secondary stirrer 151 II are respectively arranged in the tanks to perform complete mixing; the primary micro-oxygen tank 12 and the secondary micro-oxygen tank 16 are mainly subjected to short-cut nitrification to convert ammonia nitrogen into nitrate nitrogen substances; the water in the primary micro-oxygen tank 12 flows back to the primary anoxic tank 11 through the nitrate reflux pump 14, so that nitrate nitrogen is reduced into nitrogen gas in the primary anoxic tank 11 for removal by denitrification; the second-stage micro-oxygen tank 16 is lifted into the ultrafiltration membrane system 4 through the first lifting pump 51 to perform mud-water separation, the filtered produced water enters the subsequent membrane advanced treatment system 6 to be further treated and then is discharged after reaching standards, the trapped mud-water mixture returns to the first-stage anoxic tank 11 to strengthen denitrification, and the total nitrogen removal rate of the system is improved.
The specific implementation is as follows: the control cabinet 9 is used for acquiring, inputting and analyzing and processing signals of on-line dissolved oxygen, on-line ammonia nitrogen, on-line nitrate nitrogen and electric linear air regulating valves in the primary micro-oxygen tank 12 and the secondary micro-oxygen tank 16, an intelligent software algorithm in the control cabinet 9 is used for calculating an actual oxygen demand value in each micro-oxygen tank, an actual aeration air quantity set value and an actual required valve position set value of each electric linear regulating valve, and an actuator of the electric linear regulating valve is correspondingly and dynamically adjusted according to an output value.
The control cabinet 9 is input through the signal collection of the gas flow of each aeration branch, the online liquid level, the online pressure of the air pipe of the aeration equipment 3 and the operation parameters of the variable frequency aeration fan 31, the intelligent software in the control cabinet 9 compares the calculated operation pressure, aeration quantity, aeration frequency and the like of the aeration fan 31 with the input values, and the calculated operation pressure, aeration quantity, aeration frequency and the like, and the calculated operation pressure, aeration quantity, aeration frequency and the calculated aeration quantity are timely optimized and adjusted, transmitted to the control system of the air blower, and the aeration quantity and the aeration frequency of the aeration fan 31 are adjusted in real time so as to achieve the aim of optimal energy conservation.
The control cabinet 9 automatically calculates and evaluates the pressure loss change and the running state of the aerator through the long-term running signal acquisition and input of the air pipe on-line pressure and the on-line liquid level of the aeration equipment 3, and timely gives out a prompt signal whether the aerator needs cleaning maintenance or overhauling replacement or not so as to improve the running stability of the aeration system.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (10)
1. An oxygen management system based on short-cut nitrification of landfill leachate, which is characterized by comprising:
the treatment tank comprises a primary anoxic tank, a primary micro-aerobic tank and a reflux pump, wherein the primary anoxic tank is communicated with the primary micro-aerobic tank so as to be capable of conveying a treated solution to the primary micro-aerobic tank, and the reflux pump is communicated with the primary anoxic tank and the primary micro-aerobic tank and is used for refluxing a short-nitrified solution in the primary micro-aerobic tank to the primary anoxic tank;
the monitoring equipment comprises a primary dissolved oxygen meter, a primary ammonia nitrogen meter and a primary nitrate nitrogen meter which are used for monitoring corresponding parameters of the solution in the primary micro-oxygen tank; and
the aeration equipment comprises an aeration fan, a primary gas pipeline and a primary regulating valve, wherein one end of the primary gas pipeline is connected with the aeration fan, the other end of the primary gas pipeline stretches into the primary micro-oxygen tank, the primary regulating valve is arranged on the primary gas pipeline, and the primary regulating valve is used for regulating the gas supply flow of the primary gas pipeline according to the monitoring data of the primary dissolved oxygen meter, the primary ammonia nitrogen meter and the primary nitrate nitrogen meter.
2. The oxygen management system based on landfill leachate short-cut nitrification, as claimed in claim 1, wherein a primary gas flowmeter is further arranged on the primary gas pipeline; and/or the number of the groups of groups,
a primary mixer is arranged in the primary anoxic tank; and/or the number of the groups of groups,
one end of the primary gas pipeline extending into the primary micro-oxygen tank is provided with a primary aerator.
3. The oxygen management system based on landfill leachate short-cut nitrification according to claim 1, wherein the treatment tank further comprises a secondary anoxic tank and a secondary micro-aerobic tank, the secondary anoxic tank is communicated with the primary micro-aerobic tank and the secondary micro-aerobic tank, and is used for containing the solution treated in the primary micro-aerobic tank and for delivering the solution treated by the treatment tank to the secondary micro-aerobic tank;
the monitoring equipment further comprises a secondary dissolved oxygen meter, a secondary ammonia nitrogen meter, a secondary nitrate nitrogen meter and a liquid level meter, wherein the secondary dissolved oxygen meter, the secondary ammonia nitrogen meter, the secondary nitrate nitrogen meter and the liquid level meter are used for monitoring corresponding parameters of the solution in the secondary micro-oxygen tank;
the aeration equipment further comprises a secondary gas transmission pipeline, one end of the secondary gas transmission pipeline is connected with the aeration fan, the other end of the secondary gas transmission pipeline stretches into the secondary micro-oxygen tank, a secondary regulating valve is arranged on the secondary gas transmission pipeline and is used for regulating the gas transmission flow according to the monitoring data of the secondary dissolved oxygen meter, the secondary ammonia nitrogen meter and the secondary nitrate nitrogen meter.
4. The oxygen management system based on landfill leachate short-cut nitrification as claimed in claim 3, further comprising an ultrafiltration membrane system, wherein the ultrafiltration membrane system is respectively connected with the secondary micro-oxygen tank and the primary anoxic tank, is used for filtering the solution processed in the secondary micro-oxygen tank and can convey the mud-water mixture trapped by the solution to the primary anoxic tank.
5. The oxygen management system based on short-cut nitrification of landfill leachate according to claim 4, wherein a first lifting pipeline is arranged between the ultrafiltration membrane system and the secondary micro-oxygen tank, and a first lifting pump is arranged on the first lifting pipeline and is used for lifting the solution treated in the secondary micro-oxygen tank to the ultrafiltration membrane system.
6. The oxygen management system based on the short-cut nitrification of landfill leachate according to claim 4, further comprising a membrane advanced treatment system, wherein the membrane advanced treatment system is communicated with the ultrafiltration membrane system, and is used for deeply purifying the solution conveyed by the ultrafiltration membrane system and discharging after the purification.
7. The oxygen management system based on landfill leachate short-cut nitrification as claimed in claim 3, wherein the aeration equipment further comprises a gas transmission main pipe, and a pressure meter for monitoring gas transmission pressure is arranged on the gas transmission main pipe;
the primary gas pipeline and the secondary gas pipeline are respectively communicated with the gas transmission main pipe.
8. The oxygen management system based on landfill leachate short-cut nitrification as claimed in claim 3, wherein a secondary gas flowmeter is further arranged on the secondary gas pipeline; and/or the number of the groups of groups,
a secondary stirrer is arranged in the secondary anoxic tank; and/or the number of the groups of groups,
and a secondary aerator is arranged at one end of the secondary gas pipeline extending into the secondary micro-oxygen tank.
9. The oxygen management system based on the short-cut nitrification of landfill leachate according to any one of claims 1 to 8, further comprising a regulating tank, wherein a regulating stirrer is arranged in the regulating tank, a second lifting pipeline is arranged between the regulating tank and the primary anoxic tank, and a second lifting pump is arranged on the second lifting pipeline and is used for lifting the solution in the regulating tank into the primary anoxic tank.
10. The landfill leachate shortcut nitrification based oxygen management system of claim 9, further comprising an anaerobic reactor, wherein said anaerobic reactor is in communication with said conditioning tank and said primary anoxic tank and is positioned between said second lift pump and said primary anoxic tank.
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