CN213950729U - Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower - Google Patents
Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower Download PDFInfo
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- CN213950729U CN213950729U CN202022215536.9U CN202022215536U CN213950729U CN 213950729 U CN213950729 U CN 213950729U CN 202022215536 U CN202022215536 U CN 202022215536U CN 213950729 U CN213950729 U CN 213950729U
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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 utility model relates to a biological treatment technique of IPC classification C02F3/00 water, waste water or sewage, in particular to a waste water biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower.
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.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a waste water biomembrane microbubble oxygenation formula high rate trickling filtration treating column improves the interior ventilation of tower and promotes the activity of biomembrane microorganism, stabilizes and improves and handles quality of water.
The purpose of the utility model is realized 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 discharge pipe, a dissolved oxygen control sensor is arranged on the water discharge 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 is installed 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 utility model discloses an advantage and effect: 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 utility model discloses the principle lies in: 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.
The utility model discloses in, utilize a set of microbubble oxygenator 6, increase dissolved oxygen in the backflow aquatic, return the front end or the top of trickling filtration tower 1 again, together get into trickling filtration tower 1 with the influent stream of influent stream pipe 3, front end or top organic load highest region in trickling filtration tower 1, in time supply and provide dissolved oxygen, consequently overcome above-mentioned traditional high rate trickling filtration tower anaerobic corruption phenomenon that takes place easily under high organic load to improve or promote the processing property.
The present invention will be further explained with reference to the drawings 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 mode through an automatic control valve 7 in a bypass mode; the sedimentation tank 2 is connected with a water discharge pipe 10, a dissolved oxygen control sensor 11 is arranged on the water discharge pipe 10, the dissolved oxygen control sensor 11 is connected with the automatic control valve 7 through a control circuit, and the oxygen making 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.
In the foregoing, the dissolved oxygen control sensor 11 is installed 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.
The embodiment of the utility model provides an in, sewage gets into the filter material clearance by the whereabouts in influent pipe 3 entering trickling filtration tower 1 top, let out and filter sewage and get into sedimentation tank 2 down, it is further, it is discharged by abandonment mud discharge port 5 to deviate from mud in the sedimentation tank 2, sewage is drawn by discharge pipe 10 behind the sedimentation tank 2 processing, and, part sewage is after introducing microbubble oxygenator 6 by circulating water pump 9 in discharge pipe 10, simultaneously by installing 11 linkage automatic control valves 7 of dissolved oxygen control sensor who discharges terminally at discharge pipe 10, start oxygen making 8 work of machine and to 6 microbubble oxygenizers of microbubble oxygenator oxygenation, circulation sewage after 6 output oxygenation of microbubble oxygenator has the top to connect back in trickling filtration tower 1 through hyperoxic water pipe 4, improve the ventilation of filter media, promote the biomembrane activity, improve the operating mode.
The embodiment of the utility model provides an in, trickling filter tower 1 is according to the operating mode, selects following mode of operation to move:
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 utility model, technological parameter includes: 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 utility model, the 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 utility model provides an in, including with nitrifying and the total nitrogen measure is got rid of to the denitrification method, applicable multiple operation mode is in order to adapt to influent water quality change and operation requirement.
In the embodiment of the utility model, the organic load design parameters of the trickling filter can be improved, and the volume of the high trickling filter 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 (9)
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 water discharge pipe (10), 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 line.
2. 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.
3. 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).
4. 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).
5. 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).
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 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).
7. 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).
8. The wastewater biofilm microbubble oxygenation type high-rate trickling filtration treatment tower as claimed in claim 1, characterized in that a dissolved oxygen control sensor (11) is installed at the discharge end of the discharge water pipe (10).
9. 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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| CN112174323A (en) * | 2020-09-29 | 2021-01-05 | 昆山润淞环保科技有限公司 | Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and process |
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| CN112174323A (en) * | 2020-09-29 | 2021-01-05 | 昆山润淞环保科技有限公司 | Wastewater biomembrane microbubble oxygenation type high-rate trickling filtration treatment tower and process |
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