CN112174323A - Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and process - Google Patents
Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and process Download PDFInfo
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- CN112174323A CN112174323A CN202011054396.XA CN202011054396A CN112174323A CN 112174323 A CN112174323 A CN 112174323A CN 202011054396 A CN202011054396 A CN 202011054396A CN 112174323 A CN112174323 A CN 112174323A
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- 238000001914 filtration Methods 0.000 title claims abstract description 59
- 238000006213 oxygenation reaction Methods 0.000 title claims abstract description 22
- 239000002351 wastewater Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 113
- 239000001301 oxygen Substances 0.000 claims abstract description 94
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 94
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 87
- 238000004062 sedimentation Methods 0.000 claims abstract description 21
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 13
- 238000010992 reflux Methods 0.000 claims description 12
- 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 description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 244000005700 microbiome Species 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000005276 aerator Methods 0.000 claims description 6
- 239000010802 sludge Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 6
- 230000000813 microbial effect Effects 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 239000012855 volatile organic compound Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A wastewater biomembrane microbubble oxygenation type high-efficiency trickling filtration treatment tower is characterized in that the lower side of a trickling filtration tower (1) is connected with a sedimentation tank (2), the sedimentation tank (2) is connected with a microbubble oxygenator (6) through a circulating water pump (9), the microbubble oxygenator (6) is connected into the top of the trickling filtration tower (1) through a high-oxygen water pipe (4), and the microbubble oxygenator (6) bypasses an automatic control valve (7) to be connected with an oxygen making machine (8); a dissolved oxygen control sensor (11) is arranged on the water discharge pipe (10), and the dissolved oxygen control sensor (11) is connected with the automatic control valve (7) through a control circuit; the oxygen supply amount of the oxygenation device is controlled by the concentration of dissolved oxygen in the discharged water, and the ammonia nitrogen anaerobic ammoxidation effect in the depth of the biological membrane is promoted. The removal rates of BOD, COD and ammonia nitrogen are improved; when the inflow rate is low or zero, the filter material is kept moist, the microbial activity is maintained, the concentration of oxygen in the backflow water and the discharged water is improved, and the concentration of ammonia nitrogen in the discharged water is substantially and remarkably reduced.
Description
Technical Field
The invention relates to a biological treatment technology of IPC classification C02F3/00 water, wastewater or sewage, in particular to a wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and a process.
Background
The biological trickling filtration technology is one of the commonly used methods for treating VOCs malodorous gases, in particular to treating malodorous gases in sewage plants and pharmaceutical sewage malodorous gases. The bio-trickling filter device has simple structure, can purify according to the selectivity of the components of the waste gas, and can lift the filler, thereby being convenient for replacing the filler and saving the raw materials.
The principle of biological trickling filtration deodorization is to utilize the life activities of microorganisms to consume VOCs malodorous gases in waste gas and decompose the gases into carbon dioxide and water. The principle is the same as that of the biological method for treating the wastewater, but because microorganisms cannot live in a gaseous state, malodorous pollutants need to be transferred into a liquid phase or a gaseous phase, and the microorganisms can survive in a solid or gaseous environment to normally work. Foul gas lets in the biological trickling filter after collecting, and VOCs waste gas is through the diffusion, and the medicament contact in with the trickling filter, then during VOCs dissolves the liquid, because the poor problem of the inside and outside concentration of biomembrane, VOCs diffuses gradually in the biomembrane is inboard from the biomembrane outside. Then, vocs entering the membrane are absorbed and utilized by microorganisms, the microorganisms use the vocs as energy, the harmless carbon dioxide and water are discharged finally, and metabolites are diffused out in the original states of the vocs.
Chinese patent application 201710085176.5 filed by the salt city academy of technology relates to a biotrickling filter device and a biotrickling filter system. The biological trickling filter device comprises an infrared analyzer and a plurality of trickling filters. The trickling filtration towers are respectively connected with the infrared analyzer through a plurality of first pipelines. Every first pipeline all is provided with first solenoid valve, first solenoid valve and infrared analyzer communication connection. Each trickling filter tower comprises a tower body, a filler component and a spraying component for spraying nutrient solution. The lifting assembly of the liftable packing assembly, the spraying assembly, the packing assembly and the lifting assembly are all arranged in the tower body, and the packing assembly is connected with the lifting assembly.
A high-rate trickling filtration tower belongs to a novel technology of a wastewater biofilm treatment method, and a biofilm decomposes organic matters in wastewater in an aerobic environment and oxidizes ammonia nitrogen into nitrate nitrogen; the traditional high-rate trickling filtration tower supplies fresh air from the rear end or the lower part by forced ventilation, oxygen in the fresh air enters a biological membrane by upward diffusion, however, when the organic load of wastewater is increased, the efficiency of the oxygen transmission mode is poor, and meanwhile, the anaerobic putrefaction phenomenon occurs at the front end or the upper part of the trickling filtration tower due to the fact that the biological membrane grows in large quantity, ventilation airflow is blocked, and enough oxygen cannot be obtained in local areas, so that the treated water quality is unstable and worsened.
Disclosure of Invention
The invention aims to provide a wastewater biomembrane microbubble oxygenation type high-efficiency trickling filtration treatment tower and a process, which improve the ventilation in the tower, promote the microbial activity of the biomembrane, and stabilize and improve the quality of treated water.
The aim of the invention is achieved by the following technical measures: the lower side of the trickling filtration tower is connected with a sedimentation tank, the trickling filtration tower is filled with filter materials, the surface of the filter materials is provided with a biological membrane, an inflow water pipe enters the trickling filtration tower from the front end or the top, the sedimentation tank is connected with a micro-bubble oxygenator through a circulating water pump, the micro-bubble oxygenator is connected into the top of the trickling filtration tower through a high-oxygen water pipe, and meanwhile, the side of the micro-bubble oxygenator is connected with an oxygen making machine through an automatic control valve; the sedimentation tank is connected with a water outlet pipe, a dissolved oxygen control sensor is arranged on the water outlet pipe, and the dissolved oxygen control sensor is connected with the automatic control valve through a control circuit; the oxygen supply amount of the oxygenation device is controlled by the concentration of dissolved oxygen in the discharged water, the activity of microorganisms in the trickling filtration tower is maintained, and the anaerobic ammonia nitrogen ammoxidation effect in the depth of the biomembrane is promoted.
In particular, the process methods operated according to the selection mode respectively comprise:
1) high load mode: setting a reflux rate to be 1-2 times according to the condition that inflow water of an inflow water pipe contains high organic load, starting a micro-bubble oxygenator and an oxygen manufacturing machine, setting a target value of a treated water dissolved oxygen control sensor to be 2.0mg/L, and increasing oxygen supply of the micro-bubble oxygenator until the oxygen supply meets the target value;
2) nitrification and denitrification modes: starting and stopping the micro-bubble oxygenator at intervals of 0.5-2 hours, forming aerobic and anoxic changes in the trickling filtration tower 1 by intermittently supplying oxygen, carrying out nitrification in an aerobic section to convert ammonia nitrogen into nitrate nitrogen and nitrite nitrogen, and carrying out denitrification in an anoxic section; reducing nitrate nitrogen into nitrogen gas, thereby reducing the total nitrogen concentration of the discharged water;
3) and (3) a discharged water dissolved oxygen replenishing mode: combining the real-time measured value of the dissolved oxygen control sensor, setting the reflux rate to be 1-3 times, starting the micro-bubble oxygenator and the oxygen manufacturing machine, setting the target value of the treated dissolved oxygen control sensor to be 5.0-10.0 mg/L, and increasing the oxygen supply of the micro-bubble oxygenator until the oxygen supply meets the target value;
4) energy-saving mode: and when the flow water of the flow water inlet pipe is low in water quantity and low in load, the micro-bubble oxygenator is stopped to operate, the reflux rate is maintained by 1 time, and the trickling filtration tower supplies oxygen only by starting the forced ventilation equipment.
Particularly, the trickling filtration tower is communicated with the sedimentation tank through a closed box body or is connected through a sealed pipeline.
In particular, the high oxygen water pipe is connected into the water inlet pipe.
Particularly, the bottom of the sedimentation tank is connected with a waste sludge discharge port.
In particular, a circulating water pump is installed on the drain pipe.
Particularly, the circulating water pump is connected to the bottom of the micro-bubble aerator through a pipeline, and the automatic control valve is connected to the middle part of the micro-bubble aerator.
Particularly, the inflow water pipe enters the top of the trickling filter tower and is connected with a water distribution pipe or a dispersion disc arranged in the top of the trickling filter tower.
In particular, a dissolved oxygen control sensor at the discharge end of the discharge water pipe.
In particular, forced draft equipment is installed at the top of the trickling filtration tower.
The invention has the advantages and effects that: dissolved oxygen is supplied to the trickling filtration tower, so that the removal rates of BOD, COD and ammonia nitrogen are improved; adding return water and a microbubble aerator, keeping the filter material of the trickling filtration tower moist and maintaining the activity of microorganisms when the inflow is low or zero; the discharged water contains a large amount of dissolved oxygen, the nitrification effect is better, and the lower ammonia nitrogen concentration is achieved; the good stability of the treated water quality is ensured, the concentration of the dissolved oxygen in the bearing water body can be improved, and meanwhile, the oxygen supply amount of the oxygenation device is controlled by the concentration of the dissolved oxygen in the discharged water, so that the economic operation of the system is maintained.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
The reference numerals include:
the system comprises a trickling filtration tower 1, a sedimentation tank 2, an inflow water pipe 3, a high-oxygen water pipe 4, a waste sludge discharge port 5, a micro-bubble oxygenator 6, an automatic control valve 7, an oxygen manufacturing machine 8, a circulating water pump 9, a water discharge pipe 10 and a dissolved oxygen control sensor 11.
Detailed Description
The principle of the invention is as follows: the traditional high-rate trickling filtration tower is improved, the reflux water and the microbubble oxygenation device are added, the dissolved oxygen concentration of the discharged water is used for controlling the oxygen supply amount of the oxygenation device, the microbial activity in the trickling filtration tower is maintained, more ammonia nitrogen is converted into nitrate nitrogen, the anaerobic ammonia oxidation of the ammonia nitrogen in the depth of a biomembrane is promoted, the discharged water contains a large amount of dissolved oxygen, the dissolved oxygen concentration of a bearing water body can be improved, and the total nitrogen concentration of the effluent water is reduced; and maintaining the economic operation of the system.
In the invention, a group of micro-bubble oxygenators 6 is utilized to increase dissolved oxygen in the return water, and then the return water returns to the front end or the upper part of the trickling filter 1 and enters the trickling filter 1 together with the inflow water of the inflow water pipe 3, and the dissolved oxygen is supplied in time in the area with the highest organic load at the front end or the upper part in the trickling filter 1, so that the anaerobic putrefaction phenomenon which is easy to occur under the high organic load of the traditional high-rate trickling filter is overcome, and the process performance is improved or promoted.
The invention is further illustrated by the following figures and examples.
Example 1: as shown in the attached drawing 1, a sedimentation tank 2 is connected and installed on the lower side of a trickling filtration tower 1, a filter material is filled in the trickling filtration tower 1, a biological membrane is arranged on the surface of the filter material, an inflow water pipe 3 enters the trickling filtration tower 1 from the front end or the top, the sedimentation tank 2 is connected with a micro-bubble oxygenator 6 through a circulating water pump 9, the micro-bubble oxygenator 6 is connected into the top of the trickling filtration tower 1 through a high-oxygen water pipe 4, and meanwhile, the micro-bubble oxygenator 6 is connected with an oxygen making machine 8 in an installation; the sedimentation tank 2 is connected with a discharge water pipe 10, a dissolved oxygen control sensor 11 is arranged on the discharge water pipe 10, the dissolved oxygen control sensor 11 is connected with the automatic control valve 7 through a control circuit, and the oxygen manufacturing machine 8 is connected back to the micro-bubble oxygenator 6.
In the foregoing, the trickling filtration tower 1 and the sedimentation tank 2 are communicated through a closed box body or connected through a sealed pipeline.
Among the above, the high oxygen water pipe 4 is connected to the inlet water pipe 3.
In the above, the bottom of the sedimentation tank 2 is connected with a waste sludge discharge port 5.
In the foregoing, the circulation water pump 9 is mounted on the discharge water pipe 10.
In the foregoing, the circulating water pump 9 is connected to the bottom of the micro-bubble oxygenator 6 through a pipeline, and the automatic control valve 7 is connected to the middle of the micro-bubble oxygenator 6.
In the above, the inflow pipe 3 enters the top of the trickling filter 1 and is connected to a water distribution pipe or a dispersion plate installed in the top of the trickling filter 1.
Among the foregoing, the dissolved oxygen control sensor 11 at the discharge end of the discharge water pipe 10.
In the foregoing, a forced draft device is installed at the top of the trickling filtration tower 1.
In the embodiment of the invention, sewage enters the top of a trickling filter 1 through an inflow water pipe 3 and falls into a filter material gap, the sewage which is drained and filtered enters a sedimentation tank 2, further, sludge which is removed from the sedimentation tank 2 is discharged through a waste sludge discharge port 5, the sewage which is treated by the sedimentation tank 2 is led out through a discharge water pipe 10, moreover, after part of the sewage in the discharge water pipe 10 is led into a micro-bubble oxygenator 6 through a circulating water pump 9, a dissolved oxygen control sensor 11 which is arranged at the discharge end of the discharge water pipe 10 is linked with an automatic control valve 7, an oxygen making machine 8 is started to work to oxygenate the micro-bubble oxygenator 6, the circulating sewage which is output by the micro-bubble oxygenator 6 and oxygenated is connected back into the trickling filter 1 through the top of a high-oxygen water pipe 4, so that.
In the embodiment of the invention, the trickling filter tower 1 is operated in the following operation modes according to working conditions:
1) high load mode: setting a reflux rate to be 1-2 times according to the condition that the influent water of the influent water pipe 3 contains high organic load, starting the micro-bubble oxygenator 6 and the oxygen manufacturing machine 8, setting the target value of the treated water dissolved oxygen control sensor 11 to be 2.0mg/L, and increasing the oxygen supply of the micro-bubble oxygenator 6 until the oxygen supply meets the target value;
2) nitrification and denitrification modes: starting and stopping the operation of the microbubble aerator 6 at intervals of 0.5-2 hours, forming aerobic and anoxic changes in the trickling filtration tower 1 by intermittently supplying oxygen, carrying out nitrification in an aerobic section to convert ammonia nitrogen into nitrate nitrogen and nitrite nitrogen, and carrying out denitrification in an anoxic section; reducing nitrate nitrogen into nitrogen gas, thereby reducing the total nitrogen concentration of the discharged water;
3) and (3) a discharged water dissolved oxygen replenishing mode: setting a reflux rate to be 1-3 times by combining a real-time measured value of the dissolved oxygen control sensor 11, starting the micro-bubble oxygenator 6 and the oxygen manufacturing machine 8, setting a target value of the treated water dissolved oxygen control sensor 11 to be 5.0-10.0 mg/L, and increasing oxygen supply of the micro-bubble oxygenator 6 until the oxygen supply meets the target value;
4) energy-saving mode: when the inflow water of the inflow water pipe 3 is low in water quantity and low in load, the micro-bubble oxygenator 6 is stopped to operate, the reflux rate is maintained to be 1 time, and the trickling filtration tower 1 is used for supplying oxygen only by starting the forced ventilation equipment.
In the embodiment of the invention, the process parameters comprise: the removal rate of biochemical oxygen demand is 85-90%, and the ammonia nitrogen concentration of the discharged water<3mg/L, plastic material filter material with specific surface area of 100-233 m2/m3The oxygen supply mode is forced ventilation and backflow water microbubble oxygenation, and the organic load is 0.6-4.8 kg BOD/m3D, hydraulic load of 15 to 120m3/m3D, reflux rate of 1-3, concentration of oxygen dissolved in reflux water>20mg/L, and the concentration of dissolved oxygen in the discharged water is 5-10 mg/L.
In the embodiment of the invention, a data source Metcalf is used&Eddy,Wastewater Engineering,5thThe traditional high-rate trickling filtration tower process parameters disclosed by edition (2013) are used as controls:
obviously, after the microbubbles of the return water are added for increasing the oxygen, the hydraulic load and the organic load range are expanded, the concentration of the oxygen dissolved in the return water and the concentration of the ammonia nitrogen in the discharged water are improved, and the concentration of the ammonia nitrogen in the discharged water is substantially and obviously reduced.
The embodiment of the invention comprises measures for removing total nitrogen by a nitrification method and a denitrification method, and can be suitable for various operation modes to adapt to the inflow water quality change and the operation requirement.
In the embodiment of the invention, the design parameters of the organic load of the trickling filtration tower can be improved, and the volume of the high trickling filtration tower can be effectively reduced under the same water treatment amount; when necessary, the concentration of the dissolved oxygen discharged by the water discharge pipe 10 can be increased to 5-10 mg/L, and the dissolved oxygen is supplemented to the bearing water body.
Claims (10)
1. The wastewater biomembrane microbubble oxygenation type high-efficiency trickling filtration treatment tower is characterized in that a sedimentation tank (2) is connected and installed on the lower side of a trickling filtration tower (1), a filter material is filled in the trickling filtration tower (1), a biomembrane is arranged on the surface of the filter material, an inflow water pipe (3) enters the trickling filtration tower (1) from the front end or the top, the sedimentation tank (2) is connected with a microbubble oxygenator (6) through a circulating water pump (9), the microbubble oxygenator (6) is connected into the top of the trickling filtration tower (1) through a high-oxygen water pipe (4), and meanwhile, the microbubble oxygenator (6) is installed and connected with an oxygen making machine (8) by bypassing an automatic control valve (7); the sedimentation tank (2) is connected with a discharge water pipe (10), a dissolved oxygen control sensor (11) is arranged on the discharge water pipe (10), and the dissolved oxygen control sensor (11) is connected with the automatic control valve (7) through a control line; the oxygen supply amount of the oxygenation device is controlled by the concentration of dissolved oxygen in the discharged water, the activity of microorganisms in the trickling filtration tower is maintained, and the anaerobic ammonia nitrogen ammoxidation effect in the depth of the biomembrane is promoted.
2. The wastewater biofilm microbubble oxygenation type high-rate trickling filtration treatment process as claimed in claim 1, characterized in that the process methods operating according to the selection mode respectively are as follows:
1) high load mode: setting a reflux rate to be 1-2 times according to the condition that the influent water of the influent water pipe (3) contains high organic load, starting the micro-bubble oxygenator (6) and the oxygen manufacturing machine (8), setting a target value of a treated water dissolved oxygen control sensor (11) to be 2.0mg/L, and increasing the oxygen supply of the micro-bubble oxygenator (6) until the oxygen supply meets the target value;
2) nitrification and denitrification modes: starting and stopping the operation of the micro-bubble oxygenator (6) at intervals of 0.5-2 hours, forming aerobic and anoxic changes in the trickling filtration tower (1) through intermittent oxygen supply, carrying out nitrification in an aerobic section to convert ammonia nitrogen into nitrate nitrogen and nitrite nitrogen, and carrying out denitrification in an anoxic section; reducing nitrate nitrogen into nitrogen gas, thereby reducing the total nitrogen concentration of the discharged water;
3) and (3) a discharged water dissolved oxygen replenishing mode: setting a reflux rate to be 1-3 times by combining a real-time measured value of a dissolved oxygen control sensor (11), starting a micro-bubble oxygenator (6) and an oxygen manufacturing machine (8), setting a target value of the treated water dissolved oxygen control sensor (11) to be 5.0-10.0 mg/L, and increasing oxygen supply of the micro-bubble oxygenator (6) until the oxygen supply meets the target value;
4) energy-saving mode: when the inflow water of the inflow water pipe (3) is low in water quantity and load, the micro-bubble oxygenator (6) is stopped to operate, the reflux rate is maintained to be 1 time, and the trickling filtration tower (1) is used for supplying oxygen only by starting the forced ventilation equipment.
3. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that the trickling filtration tower (1) is communicated with the sedimentation tank (2) through a closed box body or is connected through a sealed pipeline.
4. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that the high-oxygen water pipe (4) is connected to the inflow water pipe (3).
5. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that the bottom of the sedimentation tank (2) is connected with a waste sludge discharge port (5).
6. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that a circulating water pump (9) is installed on the discharge water pipe (10).
7. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that a circulating water pump (9) is connected to the bottom of the microbubble aerator (6) through a pipeline, and an automatic control valve (7) is connected to the middle part of the microbubble aerator (6).
8. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that an inflow water pipe (3) enters the top of the trickling filtration tower (1) and is connected with a water distribution pipe or a dispersion disc arranged in the top of the trickling filtration tower (1).
9. The wastewater biofilm microbubble oxygenation type high-rate trickling filtration tower of claim 1, characterized by a dissolved oxygen control sensor (11) at the discharge end of the discharge water pipe (10).
10. The wastewater biofilm microbubble oxygenation type high-efficiency trickling filtration treatment tower as claimed in claim 1, characterized in that a forced draft device is installed at the top of the trickling filtration tower (1).
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| CN213950729U (en) * | 2020-09-29 | 2021-08-13 | 昆山瑞淞环境科技有限公司 | Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower |
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