CN220351881U - Sewage treatment system adopting heavy ion microporous membrane aeration coupling AAO technology - Google Patents
Sewage treatment system adopting heavy ion microporous membrane aeration coupling AAO technology Download PDFInfo
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- CN220351881U CN220351881U CN202322361995.1U CN202322361995U CN220351881U CN 220351881 U CN220351881 U CN 220351881U CN 202322361995 U CN202322361995 U CN 202322361995U CN 220351881 U CN220351881 U CN 220351881U
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- 238000005273 aeration Methods 0.000 title claims abstract description 168
- 239000010865 sewage Substances 0.000 title claims abstract description 71
- 239000012982 microporous membrane Substances 0.000 title claims abstract description 28
- 230000008878 coupling Effects 0.000 title claims abstract description 10
- 238000010168 coupling process Methods 0.000 title claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 10
- 238000005516 engineering process Methods 0.000 title description 4
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 130
- 239000001301 oxygen Substances 0.000 claims abstract description 130
- 239000010802 sludge Substances 0.000 claims abstract description 104
- 238000004062 sedimentation Methods 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 41
- 230000008569 process Effects 0.000 claims abstract description 38
- 238000005276 aerator Methods 0.000 claims description 29
- 238000010992 reflux Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000011148 porous material Substances 0.000 claims description 14
- 238000004065 wastewater treatment Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 29
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 18
- 229910052698 phosphorus Inorganic materials 0.000 description 18
- 239000011574 phosphorus Substances 0.000 description 18
- 150000002500 ions Chemical class 0.000 description 17
- 230000001965 increasing effect Effects 0.000 description 12
- 239000012528 membrane Substances 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 244000005700 microbiome Species 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000004064 recycling Methods 0.000 description 7
- 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 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 6
- UEKDBDAWIKHROY-UHFFFAOYSA-L bis(4-bromo-2,6-ditert-butylphenoxy)-methylalumane Chemical compound [Al+2]C.CC(C)(C)C1=CC(Br)=CC(C(C)(C)C)=C1[O-].CC(C)(C)C1=CC(Br)=CC(C(C)(C)C)=C1[O-] UEKDBDAWIKHROY-UHFFFAOYSA-L 0.000 description 5
- 230000003028 elevating effect Effects 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 239000002101 nanobubble Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001546 nitrifying effect Effects 0.000 description 2
- 125000001477 organic nitrogen group Chemical group 0.000 description 2
- 238000010525 oxidative degradation reaction Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 1
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- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
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- 239000011159 matrix material Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
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- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 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
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- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The utility model provides a sewage treatment system of a heavy ion microporous membrane aeration coupling AAO process, which comprises an anaerobic tank, an anoxic tank, a micro-oxygen aeration tank and a sedimentation tank which are sequentially communicated; the anaerobic tank is communicated with a sewage inlet pipe; the rear section of the micro-oxygen aeration tank is communicated with the front section of the anoxic tank through a backflow channel; the sedimentation tank is communicated with the drain pipe; the bottom of the sedimentation tank is communicated with a sludge discharge pipe, a part of sludge is conveyed into the anaerobic tank through the sludge discharge pipe, and the other part of sludge is discharged through the sludge discharge pipe; a micro-oxygen aeration device, a lifting device and a vibration device are arranged in the micro-oxygen aeration tank; the lifting device comprises a lifting base, a guide rod, a screw rod, a lifting transverse plate, a lifting motor and a fixing piece. The utility model has the advantages of ingenious design, strong practicability, high aeration efficiency, low sludge yield, good dephosphorization effect, high sewage treatment efficiency, stable performance, low energy consumption, low maintenance frequency, simple and convenient maintenance and the like.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a heavy ion microporous membrane aeration coupling AAO process sewage treatment system.
Background
The AAO process (Anaerobic-Aerobic-oxidation) is the first letter of English (Anaerobic-Anoxic-Aerobic method), is a common sewage treatment process, can be used for secondary sewage treatment or tertiary sewage treatment, and has good denitrification and dephosphorization effects when reclaimed water is recycled. It was found during practical use that it had the following drawbacks and limitations: the energy consumption is higher: the activated sludge process AAO process requires a large amount of oxygen to be supplied in the aerobic zone to promote oxidation and biodegradation of organic matters, and requires a high-power aeration system to be used in order to supply a large amount of oxygen to the aerobic zone, resulting in high energy consumption.
The treatment efficiency is unstable: the AAO process of the activated sludge process is sensitive to the quality of the inlet water and the fluctuation of load; when the quality and load of sewage change, the sewage treatment effect may be reduced, resulting in unstable effluent quality.
The sludge yield is larger: the amount of sludge generated in the activated sludge process AAO process is large, and the generated sludge is required to be subjected to treatment such as sludge concentration and dehydration, so that the treatment cost of the sludge is increased, and the burden of enterprises is increased; if sludge is improperly treated, pollution and resource waste may also be caused.
The oxidation pond demand is higher: the AAO process of the activated sludge process needs to establish an oxidation pond with a larger space to treat sewage, and the construction and operation costs of the oxidation pond are increased.
In order to solve the problems existing in the existing activated sludge process AAO process, the sewage treatment efficiency and effect are improved, and enterprises are promoted to continuously research and improve the activated sludge process AAO process. The utility model patent with the name of 202210585839.0 is characterized in that MABR biological membranes are adopted to treat sewage, but the cost is high, and a large amount of sludge is attached to the surfaces of the MABR biological membranes after the MABR biological membranes are used for a certain time, so that cleaning and maintenance are needed, shutdown is needed for maintenance, and operators enter a MABR tank for flushing, so that the maintenance time and the cost are increased.
Therefore, how to treat sewage by using MABR biological membranes in the activated sludge process AAO technology is not applicable, so that the dissolved oxygen in an oxidation pond is improved, the oxidative degradation of organic matters in the sewage is promoted, the sewage treatment effect is improved, the energy consumption in the sewage treatment process is reduced, the problems of unsmooth aeration and the like caused by blocking of bubble holes of an aeration system are avoided, the sewage treatment space is reduced, the equipment maintenance time and the maintenance difficulty are reduced, and the sewage treatment efficiency is improved to be the problem to be solved and overcome in the activated sludge process AAO technology.
Disclosure of Invention
The heavy ion microporous membrane aeration coupling AAO process sewage treatment system provided by the utility model has the advantages of low energy consumption, stable performance, good sewage treatment effect, low maintenance frequency and convenience in maintenance, and effectively solves the problems of high sewage treatment energy consumption, poor sewage treatment effect, easiness in blocking aeration holes, long equipment maintenance time, high maintenance difficulty and the like in the prior art, thereby effectively reducing the sewage treatment energy consumption, reducing the shutdown maintenance time and equipment maintenance frequency, and improving the sewage treatment efficiency and the treatment effect.
The utility model provides a sewage treatment system of a heavy ion microporous membrane aeration coupling AAO process, which comprises an anaerobic tank, an anoxic tank, a micro-oxygen aeration tank and a sedimentation tank which are sequentially communicated; the front section of the anaerobic tank is communicated with a sewage inlet pipe; the rear section of the micro-oxygen aeration tank is communicated with the front section of the anoxic tank through a backflow channel; the rear section of the sedimentation tank is communicated with a drain pipe, and treated water precipitated in the sedimentation tank is discharged through the drain pipe; the bottom of the sedimentation tank is communicated with a sludge discharge pipe, a part of sludge is conveyed into the anaerobic tank through the sludge discharge pipe, and the other part of sludge is discharged through the sludge discharge pipe; the micro-oxygen aeration tank is internally provided with a micro-oxygen aeration device capable of moving up and down, a lifting device connected with the micro-oxygen aeration device and used for adjusting the height of the micro-oxygen aeration device, and a vibrating device fixed on the micro-oxygen aeration device; the lifting device comprises lifting bases which are fixed on the micro-oxygen aeration tank and are positioned on two sides of the micro-oxygen aeration tank, guide rods and screw rods which are respectively arranged on the lifting bases, a lifting transverse plate which is arranged above the micro-oxygen aeration tank, a lifting motor which is fixed on the lifting transverse plate and is connected with the screw rods for driving the lifting transverse plate to move up and down, and a fixing piece which is arranged between the lifting transverse plate and the micro-oxygen aeration device.
Preferably, the lifting bases are respectively fixed on the front side and the rear side of the micro-oxygen aeration tank; two guide rods and a screw rod are fixed on the lifting base, the two guide rods are respectively fixed at two ends of the lifting base, and the screw rod is positioned between the two guide rods; the lifting transverse plate is arranged in the guide rod and the screw rod, and the lifting transverse plate is controlled to move up and down in the guide rod through the lifting motor.
Preferably, the micro-oxygen aeration device comprises a fixed main support connected with the fixing piece and a plurality of groups of micro-pore aeration components which are fixed on the fixed main support and are communicated with an external air supply pipeline; the microporous aeration components are connected in parallel and then communicated with an external air supply pipeline.
Preferably, the microporous aeration component comprises a fixing frame which is of a rectangular structure and is fixed on the fixing main support, and four microporous aerators which are fixed on the fixing frame; the microporous aerators are connected in parallel and then communicated with an external air supply pipeline; the microporous aerator comprises a main air inlet pipe communicated with an external air supply pipeline and a plurality of breathable film pipes communicated with the main air inlet pipe; the breathable film tube comprises an inner supporting layer, an outer supporting layer and a heavy ion microporous film layer arranged between the inner supporting layer and the outer supporting layer; the thickness of the heavy ion microporous membrane layer is 10-100 micrometers, and the pore diameter of the air bubble hole is 0.1-40 micrometers.
Preferably, the fixing piece is a corrosion-resistant fixing rope.
Preferably, the bottom of the front section of the anaerobic tank, the bottom of the front section of the anoxic tank and the bottom of the front section of the micro-oxygen aeration tank are provided with flow pushing devices.
Preferably, a reflux pump is arranged in the reflux channel, and part of the mixed solution at the rear section of the micro-oxygen aeration tank is refluxed to the front section of the anoxic tank through the reflux pump.
Preferably, the sludge discharge pipe comprises a sludge discharge main pipe communicated with the bottom of the sedimentation tank, a sludge return pipe for conveying sludge at the bottom of the sedimentation tank to the front section of the anaerobic tank, and a sewage discharge pipe for discharging redundant sludge in the sedimentation tank; one end of the sludge discharge main pipe is communicated with the bottom of the sedimentation tank, and one end of the sludge return pipe is communicated with the other end of the sludge discharge main pipe after being connected in parallel with the sewage pipe; the other end of the sludge return pipe is connected to the front section of the anaerobic tank; the sludge reflux pipe is provided with a sludge reflux pump; and a sewage pump is arranged on the sewage pipe.
Preferably, the vibration device is a vibrator.
Preferably, the bottom of the sedimentation tank is of a funnel-shaped structure; the drain pipe is communicated with the upper part of the rear section of the sedimentation tank; the drain pipe is provided with a drain pump.
Compared with the prior art, the utility model has the advantages of ingenious design, strong practicability, high aeration efficiency, low sludge yield, good dephosphorization effect, high sewage treatment efficiency, stable performance, low energy consumption, low maintenance frequency, simple and convenient maintenance and the like, and has the specific advantages that:
1. the micro-nano bubbles are manufactured by the micro-porous aerator in the micro-aerobic aeration tank to carry out aeration treatment on the sewage mixed liquid, so that the traditional aeration mode of an aeration disc is changed, the micro-nano aeration tank has small bubble volume and high bubble density, so that the speed of decomposing organic matters and absorbing phosphorus by aerobic microorganisms in the micro-dissolved oxygen aeration tank is increased, the loss of oxygen in the aerobic tank is reduced, the sewage treatment efficiency is improved, the energy consumption of the micro-porous aerator is low, the energy consumption of sewage treatment is effectively reduced, and the equipment performance is optimized; in addition, the heavy ion microporous membrane layer is manufactured by adopting the heavy ion microporous membrane in the microporous aerator, and the microporous aerator has the advantages of small pore diameter, high density and the like, so that the microporous aerator is not easy to block in the use process, and the blocking rate of the device is reduced;
2. the micro-oxygen aeration device is provided with the vibration device, so that when substances such as sludge are attached to the micro-oxygen aeration device after the micro-oxygen aeration device is operated for a certain time, the micro-oxygen aeration device is vibrated by the vibration device, and therefore the substances such as the sludge attached to the micro-oxygen aeration device are shaken off from the micro-oxygen aeration device, the substances such as the sludge are prevented from being attached to the surface of the micro-oxygen aeration device, the aeration effect of the micro-oxygen aeration device is influenced, the aeration efficiency is improved, and the shutdown maintenance frequency of equipment is reduced;
3. the micro-oxygen aeration device is fixed on the lifting device, so that the position of the micro-oxygen aeration device can be adjusted, when the micro-oxygen aeration device is required to be washed, cleaned and maintained after running for a long time, the micro-oxygen aeration device is lifted to the upper part of the micro-oxygen aeration tank through the lifting device, an operator washes and maintains the micro-oxygen aeration device through a washing device such as a washing water gun, the operator does not need to enter the micro-oxygen aeration tank to wash and maintain the micro-oxygen aeration device, the operator can conveniently wash, overhaul and maintain, the problem that the operator slips down when entering the micro-oxygen aeration tank to wash the micro-oxygen aeration device is effectively avoided, and the potential safety hazard is reduced or avoided;
4. conveying part of sludge precipitated in the sedimentation tank into an anaerobic tank through a sludge return pipe for recycling; on one hand, the method can reduce the generation amount of the sludge, reduce the treatment cost of the sludge and improve the economic benefit; on the other hand, the sludge is conveyed into an anaerobic tank for recycling, so that phosphorus in the sludge can be effectively released, the concentration of phosphorus in the sewage is increased, and the concentration of Biochemical Oxygen Demand (BOD) in the sewage is reduced due to the absorption of soluble organic matters by microorganism cells; in addition, ammonia nitrogen (NH 3-N) is partially removed by synthesis of cells, so that the concentration of ammonia nitrogen (NH 3-N) in the sewage is reduced. The mixed solution at the rear section of the micro-oxygen aeration tank is returned to the front section of the anoxic tank for recycling through a return channel, then enters the micro-oxygen aeration tank for treatment, and uses denitrifying bacteria to reduce a large amount of nitrate nitrogen (NO 3-N) and nitrite nitrogen (NO 2-N) carried in the return mixed solution into nitrogen and release the nitrogen into the air by using organic matters in the sewage as carbon sources, so that the concentration of the biochemical oxygen demand (BOD 5) is reduced in five days, and the concentration of the nitrate nitrogen (NO 3-N) is greatly reduced. Adding a micro-oxygen aeration device in the micro-oxygen aeration tank, and under the combined action of the impeller, enabling the micro-oxygen aeration device to form a uniform micro-dissolved oxygen state in the area, and enabling organic matters to be biochemically degraded by microorganisms and continuously descend; the organic nitrogen is ammoniated and then nitrified, so that the concentration of ammonia nitrogen (NH 3-N) is obviously reduced, but the concentration of nitrate nitrogen (NO 3-N) is increased along with the nitrifying process, and the phosphorus in the mixed solution is also reduced at a higher speed along with excessive uptake of phosphorus accumulating bacteria; meanwhile, microorganisms capable of accumulating phosphorus in the activated sludge of the micro-aerobic aeration tank can absorb a large amount of soluble phosphorus, convert the soluble phosphorus into insoluble polyorthospate to be stored in a body, and finally discharge residual sludge through a sedimentation tank to achieve the aim of system phosphorus removal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a cross-sectional view of the present utility model.
FIG. 3 is a schematic diagram of the structure of an anaerobic tank, an anoxic tank, a micro-aerobic aeration tank and a sedimentation tank according to the present utility model.
Fig. 4 is a schematic structural view of the microporous aeration assembly of the present utility model.
FIG. 5 is a cross-sectional view of a breathable film tube of the present utility model.
Wherein, the anaerobic tank 1; a sewage inlet pipe 11; an anoxic tank 2; a micro-oxygen aeration tank 3; a return channel 31; a return pump 32; a sedimentation tank 4; a drain pipe 41; a sludge discharge pipe 5; a sludge discharge main pipe 51; a sludge return pipe 52; a drain pipe 53; a micro-oxygen aeration device 6; a fixing main bracket 61; a microporous aeration assembly 62; a fixed frame 621; a micro-pore aerator 622; a main intake pipe 6221; a gas permeable membrane tube 6222; a lifting device 7; a lifting base 71; a guide rod 72; a screw 73; a lifting cross plate 74; a lift motor 75; a fixing member 76; a vibration device 8; a pusher 9.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model discloses a sewage treatment system of a heavy ion microporous membrane aeration coupling AAO process, which is shown in figures 1 to 5.
As shown in fig. 1 and 2, the sewage treatment system of the heavy ion microporous membrane aeration coupling AAO process comprises an anaerobic tank 1, an anoxic tank 2, a micro-oxygen aeration tank 3 and a sedimentation tank 4 which are sequentially communicated. The front section of the anaerobic tank 1 is communicated with the sewage inlet pipe 11, so that external sewage can enter the anaerobic tank 11 through the sewage inlet pipe 11. A water pump is arranged on the sewage inlet pipe 11 to pump the sewage into the anaerobic tank for treatment. The rear section of the sedimentation tank 4 is communicated with a drain pipe 41, wherein the drain pipe 41 is connected to the upper part of the rear end of the sedimentation tank, and the treated water precipitated in the sedimentation tank is discharged through the drain pipe. Wherein, the anaerobic tank 1 and the anoxic tank 2 are arranged by partition walls, and through holes are arranged on the partition walls between the anaerobic tank 1 and the anoxic tank 2; the anoxic tank 2 and the micro-oxygen aeration tank 3 are arranged by partition walls, and through holes are arranged on the partition walls between the anoxic tank 2 and the micro-oxygen aeration tank 3; the micro-oxygen aeration tank 3 and the sedimentation tank 4 are arranged on a partition wall, and a through hole is arranged on the partition wall between the micro-oxygen aeration tank 3 and the sedimentation tank 4; so that sewage enters the anaerobic tank from the sewage inlet pipe 11, is treated by the anaerobic tank 1, the anoxic tank 2, the micro-oxygen aeration tank 3 and the sedimentation tank 4 in sequence, and finally the treated water precipitated by the sedimentation tank is discharged from the water discharge pipe 41.
In order to better promote the sewage flow, the front-section bottom of the anaerobic tank 1, the front-section bottom of the anoxic tank 2 and the front-section bottom of the micro-oxygen aeration tank 3 are provided with a flow impeller 9, and the sewage treatment efficiency is quickened through the flow impeller, and meanwhile, the flow of water flow can be quickened.
As shown in fig. 3, a return channel 31 is arranged between the micro-oxygen aeration tank 3 and the anoxic tank 2, and the return channel communicates the rear section of the micro-oxygen aeration tank 3 with the front section of the anoxic tank 2; meanwhile, a reflux pump 32 is arranged in the reflux canal, so that part of mixed solution at the rear section of the micro-oxygen aeration tank 3 can be refluxed to the front section of the anoxic tank 2 through the reflux canal for recycling. Wherein, the reflux pump is arranged at the joint between the micro-oxygen aeration tank 3 and the reflux canal. The reflux pump can be realized by adopting the existing submersible sewage pump sold in the market.
The bottom of the sedimentation tank 4 is communicated with a sludge discharge pipe 5, and part of sludge is conveyed into the anaerobic tank through the sludge discharge pipe, and the other part of sludge is discharged through the sludge discharge pipe. In order to better discharge the precipitated sludge, the bottom of the sedimentation tank 4 is of a funnel-shaped structure, so that the sludge is easier to deposit at the bottom of the sedimentation tank. The sludge discharge pipe 5 comprises a sludge discharge main pipe 51 communicated with the bottom of the sedimentation tank 4, a sludge return pipe 52 for conveying sludge at the bottom of the sedimentation tank 4 to the front section of the anaerobic tank, and a drain pipe 53 for discharging redundant sludge in the sedimentation tank; one end of the main sludge discharge pipe 51 is communicated with the bottom of the sedimentation tank 4, and one end of the sludge return pipe 52 is connected in parallel with the sewage discharge pipe 53 and then is communicated with the other end of the main sludge discharge pipe 51; the other end of the sludge return pipe 52 is connected to the front section of the anaerobic tank. For better sludge delivery into the anaerobic tank, a sludge return pump is provided on the sludge return pipe 52. In order to better discharge the sludge, a sewage pump is arranged on the sewage pipe 53. Wherein, the sludge reflux pump and the sewage pump can be realized by adopting the existing sludge pumps sold in the market.
In order to accelerate the speed of decomposing organic matters and absorbing phosphorus by aerobic microorganisms in the micro-dissolved oxygen aeration tank, reduce the loss of oxygen in the aerobic tank, reduce the energy consumption, and reduce the maintenance frequency of equipment, the micro-dissolved oxygen aeration tank is improved and designed. As shown in fig. 1 to 2, the micro-oxygen aeration tank 3 is provided with a micro-oxygen aeration device 6 which can move up and down, a lifting device 7 which is connected with the micro-oxygen aeration device 6 and is used for adjusting the height of the micro-oxygen aeration device 6, and a vibration device 8 which is fixed on the micro-oxygen aeration device 6. The lifting device 7 comprises a lifting base 71 fixed on the micro-oxygen aeration tank 3 and positioned at the front side and the rear side of the micro-oxygen aeration tank 3, a guide rod 72 and a screw rod 73 which are respectively arranged on the lifting base 71, a lifting transverse plate 74 arranged above the micro-oxygen aeration tank 3, a lifting motor 75 fixed on the lifting transverse plate 74 and connected with the screw rod 73 for driving the lifting transverse plate 74 to move up and down, and a fixing piece 76 arranged between the lifting transverse plate 74 and the micro-oxygen aeration device 6. Wherein the number of the descending bases 71 is two, and the two ascending and descending bases 71 are respectively fixed at the front side and the rear side of the micro-oxygen aeration tank 3. The number of the guide rods 72 is four, and the number of the screw rods 73 is two; wherein, each lifting base 71 is fixed with two guide rods 72 and a screw rod 73, the two guide rods 72 are respectively fixed at two ends of the lifting base 71, and the screw rod 73 is fixed on the lifting base 71 and is positioned between the two guide rods 72. The lifting transverse plate is of an I-shaped structure, spans across the front side, the rear side, the front side and the rear side of the micro-oxygen aeration tank 3 and is positioned above the two lifting bases 71. The lifting transverse plate 74 is movably arranged in the guide rod 72 and the screw rod 73; the number of the lifting motors is two, and the two lifting motors are fixedly arranged on the upper end surface of the lifting transverse plate 74 and correspond to the positions of the screw rods 73; the lifting motors are connected with the screw rod through a steering gear, and the lifting transverse plates 74 are controlled to move up and down on the guide rods through synchronous operation of the two lifting motors. The upper ends of the screw rod and the guide rod are provided with limiters for limiting the moving position of the lifting transverse plate 74. The lift motor 75 is a commercially available servo motor. The number of the fixing members 76 is eight, wherein four fixing members are respectively arranged on the front side and the rear side of the lifting transverse plate 74, namely four fixing members are respectively arranged on one side of the lifting transverse plate 74 above the two lifting bases 71, as shown in fig. 1. The fastener 76 is a corrosion-resistant fastener rope. Wherein one end of the fixing rope is fixed on the lifting transverse plate 74, and the other end is fixed on the micro-oxygen aeration device 6. Fix little oxygen aeration equipment on elevating gear for little oxygen aeration equipment's position can be adjusted, after little oxygen aeration equipment long-time operation, when needs wash to little oxygen aeration equipment and wash and maintain, rise little oxygen aeration equipment to little oxygen aeration tank top through elevating gear, operating personnel washes and maintains little oxygen aeration equipment through washing devices such as washing squirt, make operating personnel need not to get into little oxygen aeration tank in to wash little oxygen aeration equipment and maintain, make things convenient for operating personnel to wash, overhaul and maintain, slipping scheduling problem appears when effectively avoiding operating personnel to get into little oxygen aeration tank and wash little oxygen aeration equipment, reduce or avoid the potential safety hazard.
As shown in fig. 1, the micro-oxygen aeration device 6 includes a fixed main support 61 connected to a fixing member 76 and a plurality of groups of micro-porous aeration assemblies 62 fixed to the fixed main support 61 and communicating with an external air supply pipe. The fixing main support 61 in this embodiment is of a rectangular structure, the number of the microporous aeration assemblies 62 is six, and the six groups of microporous aeration assemblies 62 are fixed on the fixing main support 61. Six groups of microporous aeration components 62 fixed on a fixing main support 61 with a rectangular structure are arranged in a matrix of two rows and three columns. The six groups of microporous aeration components 62 are connected in parallel and then communicated with an external air supply pipeline, wherein an air pump booster pump is arranged on the pipeline communicated with the external air supply pipeline for increasing, and the external air supply pipeline can supply air through a compressor.
As shown in fig. 4, the micro-porous aeration assembly 62 includes a rectangular fixing frame 621 fixed to the fixing main frame 61 and four micro-porous aerators 622 fixed to the fixing frame 621; the four microporous aerators are connected in parallel and then communicated with an external air supply pipeline. Wherein the micro-porous aerator 622 comprises a main air inlet pipe 6221 communicated with an external air supply pipeline and a plurality of air permeable membrane pipes 6222 communicated with the main air inlet pipe 6221. The plurality of ventilation membrane tubes 6222 are uniformly and equidistantly arranged on the main air inlet tube 6221, wherein one end of each ventilation membrane tube is sealed, and the other end of each ventilation membrane tube is communicated with the main air inlet tube 6221.
As shown in fig. 5, the breathable film tube 6222 comprises an inner support layer, an outer support layer, and a heavy ion microporous film layer disposed between the inner support layer and the outer support layer; the outer support layer and the inner support layer are polyester fiber non-woven fabric layers; the heavy ion microporous membrane layer material is one or more of PET, PC, PP, PVDF. The heavy ion microporous membrane layer material in this embodiment is PET. Wherein the heavy ion microporous membrane layer is compounded between the outer support layer and the inner support layer through ultrasonic hot pressing. The thickness of the heavy ion microporous membrane layer can be realized by any thickness value of 10-100 micrometers, and the pore diameter of the bubble hole can be realized by any pore diameter of 0.1-40 micrometers. The thickness of this example is 20 microns; the pore diameter of the air bubble is 0.1 micron; the bubble holes are uniformly formed in the heavy ion microporous membrane layer. When gas enters the ventilated membrane tube, tiny micro-nano bubbles can be generated, and because the micro-nano bubbles are small, oxygen in the micro-nano bubbles is easier to dissolve into water, the oxygen content in the water is increased, and the oxidative degradation of organic substances in the wastewater is effectively promoted. The micro-oxygen aeration can accelerate the growth and the activity of microorganisms by increasing the transfer efficiency and the contact area of oxygen, thereby improving the wastewater treatment efficiency. Compared with the traditional aeration system, the micro-oxygen aeration device 6 can reduce the energy consumption by 20-30%.
As shown in fig. 2, the vibration device 8 is fixed on the upper end surface of the fixed main bracket 61 and is positioned at the center of the fixed main bracket 61; wherein the vibration device 8 is a vibrator. The vibrator can be realized by adopting the existing submersible vibration motor with good waterproof performance sold in the market. When substances such as sludge are attached to the micro-pore aerator after the micro-oxygen aerator runs for a period of time, the micro-oxygen aerator is vibrated by the vibrating device, so that the substances such as sludge attached to the micro-pore aerator are shaken off from the micro-pore aerator, the substances such as sludge are prevented from being attached to the surface of the micro-pore aerator, the aeration effect of the micro-pore aerator is influenced, the aeration efficiency is improved, and the shutdown maintenance frequency of equipment is reduced. In addition, adopt fixed rope to fix between little oxygen aeration equipment 6 and the elevating gear 7, the effectual elevating gear's of avoiding vibrating device influence when vibrating, avoid elevating gear 7 to produce the vibration, influence the security of equipment.
The working principle of the heavy ion microporous membrane aeration coupling AAO process sewage treatment system is as follows: sewage enters the anaerobic tank from the sewage water inlet pipe, is treated by the anaerobic tank, the anoxic tank, the micro-oxygen aeration tank and the sedimentation tank in sequence, and finally treated water precipitated by the sedimentation tank is discharged from the water discharge pipe, and part of sludge precipitated in the sedimentation tank is conveyed into the anaerobic tank through the sludge return pipe for recycling; on one hand, the method can reduce the generation amount of the sludge, reduce the treatment cost of the sludge and improve the economic benefit; on the other hand, the sludge is conveyed into an anaerobic tank for recycling, so that phosphorus in the sludge can be effectively released, the concentration of phosphorus in the sewage is increased, and the concentration of Biochemical Oxygen Demand (BOD) in the sewage is reduced due to the absorption of soluble organic matters by microorganism cells; in addition, ammonia nitrogen (NH 3-N) is partially removed by synthesis of cells, so that the concentration of ammonia nitrogen (NH 3-N) in the sewage is reduced. The mixed solution at the rear section of the micro-oxygen aeration tank is returned to the front section of the anoxic tank for recycling through a return channel, then enters the micro-oxygen aeration tank for treatment, and uses denitrifying bacteria to reduce a large amount of nitrate nitrogen (NO 3-N) and nitrite nitrogen (NO 2-N) carried in the return mixed solution into nitrogen and release the nitrogen into the air by using organic matters in the sewage as carbon sources, so that the concentration of the biochemical oxygen demand (BOD 5) is reduced in five days, and the concentration of the nitrate nitrogen (NO 3-N) is greatly reduced. Adding a micro-oxygen aeration device in the micro-oxygen aeration tank, and under the combined action of the impeller, enabling the micro-oxygen aeration device to form a uniform micro-dissolved oxygen state in the area, and enabling organic matters to be biochemically degraded by microorganisms and continuously descend; the organic nitrogen is ammoniated and then nitrified, so that the concentration of ammonia nitrogen (NH 3-N) is obviously reduced, but the concentration of nitrate nitrogen (NO 3-N) is increased along with the nitrifying process, and the phosphorus in the mixed solution is also reduced at a higher speed along with excessive uptake of phosphorus accumulating bacteria; meanwhile, microorganisms capable of accumulating phosphorus in the activated sludge of the micro-aerobic aeration tank can absorb a large amount of soluble phosphorus, convert the soluble phosphorus into insoluble polyorthospate to be stored in a body, and finally discharge residual sludge through a sedimentation tank to achieve the aim of system phosphorus removal. The technical scheme of dephosphorization and decarbonization can be referred to as a 'patent number 202210585839.0, and the name is a technical scheme of an improved AAO process sewage treatment system for efficient denitrification'.
In addition, when substances such as sludge are attached to the microporous aerator after the micro-aerobic aerator runs for a period of time, the micro-aerobic aerator is vibrated by the vibrating device, so that the substances such as sludge attached to the microporous aerator are shaken off from the microporous aerator, the substances such as sludge are prevented from being attached to the surface of the microporous aerator, the aeration effect of the microporous aerator is influenced, the aeration efficiency is improved, and the equipment shutdown maintenance frequency is reduced.
When the micro-oxygen aeration device is required to be washed, cleaned and maintained after long-time operation, the micro-oxygen aeration device is lifted to the upper part of the micro-oxygen aeration tank through the lifting device, and an operator washes and maintains the micro-oxygen aeration device through the flushing device such as the flushing water gun, so that the operator does not need to enter the micro-oxygen aeration tank to wash and maintain the micro-oxygen aeration device, the operator can conveniently wash, overhaul and maintain, the problem that the operator slips down when entering the micro-oxygen aeration tank to wash the micro-oxygen aeration device is effectively avoided, and the potential safety hazards are reduced or avoided.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (10)
1. A sewage treatment system of a heavy ion microporous membrane aeration coupling AAO process comprises an anaerobic tank (1), an anoxic tank (2), a micro-oxygen aeration tank (3) and a sedimentation tank (4) which are communicated in sequence; the front section of the anaerobic tank (1) is communicated with a sewage inlet pipe (11); the rear section of the micro-oxygen aeration tank (3) is communicated with the front section of the anoxic tank (2) through a backflow channel (31); the rear section of the sedimentation tank (4) is communicated with a drain pipe (41), and treated water precipitated in the sedimentation tank is discharged through the drain pipe; the device is characterized in that the bottom of the sedimentation tank (4) is communicated with a sludge discharge pipe (5), a part of sludge is conveyed into the anaerobic tank through the sludge discharge pipe, and the other part of sludge is discharged through the sludge discharge pipe; a micro-oxygen aeration device (6) capable of moving up and down is arranged in the micro-oxygen aeration tank (3), a lifting device (7) connected with the micro-oxygen aeration device (6) and used for adjusting the height of the micro-oxygen aeration device (6) and a vibrating device (8) fixed on the micro-oxygen aeration device (6); the lifting device (7) comprises lifting bases (71) fixed on the micro-oxygen aeration tank (3) and positioned on two sides of the micro-oxygen aeration tank (3), guide rods (72) and screw rods (73) respectively arranged on the lifting bases (71), lifting transverse plates (74) arranged above the micro-oxygen aeration tank (3), lifting motors (75) fixed on the lifting transverse plates (74) and connected with the screw rods (73) for driving the lifting transverse plates (74) to move up and down, and fixing pieces (76) arranged between the lifting transverse plates (74) and the micro-oxygen aeration device (6).
2. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: the lifting bases (71) are respectively fixed on the front side and the rear side of the micro-oxygen aeration tank (3); two guide rods (72) and a screw rod (73) are fixed on the lifting base (71), the two guide rods (72) are respectively fixed at two ends of the lifting base (71), and the screw rod (73) is positioned between the two guide rods (72); the lifting transverse plate (74) is arranged in the guide rod (72) and the screw rod (73), and the lifting transverse plate (74) is controlled to move up and down in the guide rod through the lifting motor (75).
3. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: the micro-oxygen aeration device (6) comprises a fixed main support (61) connected with a fixing piece (76) and a plurality of groups of micro-pore aeration components (62) which are fixed on the fixed main support (61) and are communicated with an external air supply pipeline; the groups of microporous aeration components (62) are connected in parallel and then communicated with an external air supply pipeline.
4. A heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 3, wherein: the microporous aeration component (62) comprises a fixing frame (621) which is of a rectangular structure and is fixed on the fixing main support (61) and four microporous aerators (622) which are fixed on the fixing frame (621); the microporous aerators are connected in parallel and then communicated with an external air supply pipeline; the microporous aerator (622) comprises a main air inlet pipe (6221) communicated with an external air supply pipeline and a plurality of breathable film pipes (6222) communicated with the main air inlet pipe (6221); the breathable film tube (6222) comprises an inner supporting layer, an outer supporting layer and a heavy ion microporous film layer arranged between the inner supporting layer and the outer supporting layer; the thickness of the heavy ion microporous membrane layer is 10-100 micrometers, and the pore diameter of the air bubble hole is 0.1-40 micrometers.
5. A heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 3, wherein: the fixing piece (76) is a corrosion-resistant fixing rope.
6. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: the bottom of the front section of the anaerobic tank (1), the bottom of the front section of the anoxic tank (2) and the bottom of the front section of the micro-oxygen aeration tank (3) are provided with a flow pushing device (9).
7. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: a reflux pump (32) is arranged in the reflux canal, and part of the mixed solution at the rear section of the micro-oxygen aeration tank (3) is refluxed to the front section of the anoxic tank (2) through the reflux pump.
8. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: the sludge discharge pipe (5) comprises a sludge discharge main pipe (51) communicated with the bottom of the sedimentation tank (4), a sludge return pipe (52) for conveying sludge at the bottom of the sedimentation tank (4) to the front section of the anaerobic tank, and a drain pipe (53) for discharging redundant sludge in the sedimentation tank; one end of the sludge discharge main pipe (51) is communicated with the bottom of the sedimentation tank (4), and one end of the sludge return pipe (52) is connected in parallel with the sewage drain pipe (53) and then is communicated with the other end of the sludge discharge main pipe (51); the other end of the sludge return pipe (52) is connected to the front section of the anaerobic tank; a sludge reflux pump is arranged on the sludge reflux pipe (52); and a sewage pump is arranged on the sewage pipe (53).
9. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: the vibration device (8) is a vibrator.
10. The heavy ion microporous membrane aeration coupled AAO process wastewater treatment system of claim 1, wherein: the bottom of the sedimentation tank (4) is of a funnel-shaped structure; the drain pipe (41) is communicated with the upper part of the rear section of the sedimentation tank (4); the drain pipe (41) is provided with a drain pump.
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