CN220245840U - High-efficient dephosphorization denitrification system suitable for low carbon-nitrogen ratio - Google Patents
High-efficient dephosphorization denitrification system suitable for low carbon-nitrogen ratio Download PDFInfo
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- CN220245840U CN220245840U CN202321802029.2U CN202321802029U CN220245840U CN 220245840 U CN220245840 U CN 220245840U CN 202321802029 U CN202321802029 U CN 202321802029U CN 220245840 U CN220245840 U CN 220245840U
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- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000004062 sedimentation Methods 0.000 claims abstract description 39
- 239000010865 sewage Substances 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims abstract description 26
- 238000005273 aeration Methods 0.000 claims abstract description 24
- 239000010802 sludge Substances 0.000 claims abstract description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 44
- 229910021529 ammonia Inorganic materials 0.000 claims description 22
- 230000003647 oxidation Effects 0.000 claims description 22
- 238000007254 oxidation reaction Methods 0.000 claims description 22
- 238000005276 aerator Methods 0.000 claims description 12
- 230000001012 protector Effects 0.000 claims description 7
- 239000004698 Polyethylene Substances 0.000 claims description 4
- 229920001903 high density polyethylene Polymers 0.000 claims description 4
- 239000004700 high-density polyethylene Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 17
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 17
- 239000011574 phosphorus Substances 0.000 abstract description 17
- 241000894006 Bacteria Species 0.000 abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
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- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000012856 packing Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
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- 229920003023 plastic Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
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- 239000013043 chemical agent Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 239000012764 mineral filler Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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Abstract
A high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio comprises a dephosphorization and denitrification system, a sewage pipeline and an aeration device. The dephosphorization and denitrification system comprises an anaerobic tank, an MBBR tank, an anaerobic ammoxidation tank, a facultative tank, a high-efficiency sedimentation tank, a dephosphorization filter tank and a modified MBBR filler. The efficient sedimentation tank comprises a water inlet mixer, an inclined pipe, a mud storage hopper, an overflow weir and a dephosphorization reagent feeding device. Compared with the prior art, the utility model makes denitrifying phosphorus removal bacteria domesticate and enrich on the filler by creating an anaerobic and anoxic alternate environment for the modified MBBR filler, saves carbon sources, and greatly reduces the output of residual sludge. Meanwhile, the synchronous denitrification and dephosphorization is realized by adopting a coupling process of denitrification dephosphorization and anaerobic ammoxidation. Finally, by setting the efficient sedimentation tank and the dephosphorization filter tank, the dosage of the medicament is reduced, and meanwhile, the stable standard of the effluent is ensured.
Description
Technical Field
The utility model relates to the technical field of sewage treatment equipment, in particular to a high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio.
Background
At present, along with the gradual implementation of treatment of rural domestic sewage, total phosphorus is one of the most difficult pollution indexes to treat in the operation process of a rural domestic sewage treatment terminal, and the effluent standard reaching rate of the whole system is seriously influenced.
At present, the most coping method is a chemical dephosphorization method at home, and phosphate substances in sewage are removed by adding chemical agents. The traditional biological method for removing phosphorus is gradually ignored by engineering designers because of the related sludge discharge problem and the actual operation difficulty in the operation and maintenance process of the agricultural sewage treatment terminal.
The chemical dephosphorization device comprises a grid pond, a sand setting pond, a biochemical pond and a filter pond which are sequentially communicated through pipelines, wherein a ferric trichloride inlet is connected to the pipeline between the grid pond and the sand setting pond, and a polymeric ferric sulfate inlet is connected to the pipeline between the biochemical pond and the filter pond. In order to make up for the deficiency of biological phosphorus removal, the chemical phosphorus removal process is additionally arranged in the main biological phosphorus removal process so as to consolidate biological phosphorus removal results. The chemical phosphorus removal process is provided at the front end and the rear end of sewage treatment, the front end is ferric trichloride solvent, the chemical reaction rate of small molecular compounds is faster, the rear end phosphorus removal agent is polymeric ferric sulfate, the generated precipitation alum blossom is larger, and the precipitation alum blossom can be effectively intercepted by a filter tank to effectively remove total phosphorus.
Chemical dephosphorization is higher in efficiency, but the dosage control difficulty of the medicament is higher, and operation and maintenance operators always ensure that the effluent is stable and reaches the standard through excessive medicament addition, so that the waste of the medicament and the increase of operation and maintenance cost are inevitably caused.
Disclosure of Invention
In view of the above, the present utility model provides a high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio, which can solve the above problems.
The utility model provides a high-efficient dephosphorization denitrification system suitable for low carbon nitrogen ratio, it includes a dephosphorization denitrification system, a sewage pipeline that sets up on the dephosphorization denitrification system to and a plurality of aeration equipment that sets up on the dephosphorization denitrification system. The dephosphorization and denitrification system comprises an anaerobic tank, an MBBR tank arranged on the water outlet direction of the anaerobic tank, an anaerobic ammonia oxidation tank arranged on the water outlet direction of the MBBR tank, a facultative tank arranged on the water outlet direction of the anaerobic ammonia oxidation tank, an efficient sedimentation tank arranged on the water outlet direction of the facultative tank, a dephosphorization filter tank arranged on the water outlet direction of the efficient sedimentation tank, and modified MBBR filler filled in the anaerobic tank, the MBBR tank and the facultative tank. The high-efficiency sedimentation tank is characterized in that the high-efficiency sedimentation tank is water inlet at the top and water outlet at the top and comprises a water inlet mixer arranged at the water inlet end, a plurality of inclined pipes arranged at the center of the high-efficiency sedimentation tank, four mud storage hoppers arranged at the bottom of the tank, an overflow weir arranged at the water outlet end and a dephosphorization medicament adding device arranged at the water inlet mixer. The dephosphorization filter is characterized by comprising a bottom water inlet and a top water outlet, and comprising a dephosphorization filter layer and a sand filter layer. The sewage pipeline comprises a water inlet pipe in the water inlet direction of the anaerobic tank, an overrun pipe arranged between the anaerobic tank and the anaerobic ammonia oxidation tank, a mixed liquid return pipe arranged between the MBBR tank and the water inlet pipe, and a sludge return pipe arranged between the efficient sedimentation tank and the facultative tank. One end of the overrun pipe is arranged at the water outlet end of the anaerobic tank, and the other end of the overrun pipe is arranged at the water inlet end of the anaerobic ammonia oxidation tank. And one end of the mixed liquor return pipe is arranged at the water outlet end of the MBBR tank, and the other end of the mixed liquor return pipe is arranged at the water inlet pipe. One end of the sludge return pipe is connected with the bottom of the efficient sedimentation tank, and the outlet end of the sludge return pipe is respectively connected with the bottom of the facultative tank and a sludge discharge port.
Further, a fixed packed bed and a water distributor arranged at the bottom of the anaerobic tank are arranged in the anaerobic tank, the anaerobic tank is characterized in that water enters from the bottom and exits from the top, the water inlet is connected with the water distributor, and the water outlet is connected with an overflow pipe.
Further, the MBBR tank is characterized in that water enters from the top and water exits from the bottom, a first baffle plate, a second baffle plate and a filter plate are arranged at the water outlet end, the second baffle plate is arranged at intervals with the first baffle plate, and the filter plate is arranged between the first baffle plate and the second baffle plate.
Further, the first baffle plate and the second baffle plate are both positioned on one side of the MBBR tank, which is close to the water outlet, and the second baffle plate is closer to the water outlet, and the filter plate is arranged at the end part of the free end of the first baffle plate and is simultaneously connected with the first baffle plate and the second baffle plate.
Further, the anaerobic ammonia oxidation tank is characterized in that water enters from the bottom and water exits from the top, a pair of guide plates positioned on the tank wall, a positive and negative pressure protector arranged on the tank top, and a three-phase separator connected with the positive and negative pressure protector are arranged.
Further, the modified MBBR filler is made of PE or HDPE, the diameter is 6-10 cm, the filling rate in the anaerobic tank is 40-60%, and the filling rates in the MBBR tank and the facultative tank are 30-60%.
Further, the aeration device comprises an aerator arranged at the bottom of the tank, an aeration fan arranged outside the tank, and an aeration pipe connected with the aerator and the aeration fan.
Further, the aerator is one of a pipe type, a disc type or a perforated aerator pipe, and the aeration devices are respectively arranged at the bottoms of the MBBR tank and the facultative tank.
Compared with the prior art, the high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio provided by the utility model has the advantages that the anaerobic tank and the MBBR tank are arranged, the modified MBBR filler is filled, the aeration device is used, the mixed liquid return pipe is arranged to return sewage, the denitrification and dephosphorization technology is adopted, anaerobic and anoxic alternate environments are created for the modified MBBR filler, so that denitrification and dephosphorization bacteria are domesticated and enriched on the filler, the denitrification and dephosphorization bacteria can take nitrate as an electron acceptor, denitrification and dephosphorization are realized in the same environment by utilizing a carbon source in sewage, the carbon source is saved, and the output of residual sludge is greatly reduced. Meanwhile, through the arrangement of the anaerobic ammonia oxidation tank and the overrun pipe, a denitrification dephosphorization and anaerobic ammonia oxidation coupling process is adopted, NO2-N generated by converting NO3-N by denitrifying dephosphorization bacteria and NH4-N in sewage are converted into N2 under the metabolic action of anaerobic ammonia oxidation bacteria, so that synchronous denitrification dephosphorization is realized. Finally, by arranging the efficient sedimentation tank and the dephosphorization filter tank, the reinforced chemical dephosphorization process is adopted, the phosphate substances remained after biochemical treatment are mixed with a small amount of efficient dephosphorization reagent, the mixture is coagulated and precipitated by the efficient sedimentation tank, and the effluent passes through the dephosphorization filter tank filled with dephosphorization filler, so that the reinforced dephosphorization is realized, the reagent addition amount is reduced, and the effluent is ensured to reach the standard stably.
Drawings
FIG. 1 is a schematic diagram of a product structure of a high-efficiency dephosphorization and denitrification system with a low carbon-nitrogen ratio.
FIG. 2 is a schematic process flow diagram of the efficient dephosphorization and denitrification system of FIG. 1 suitable for low carbon to nitrogen ratios.
Detailed Description
Specific embodiments of the present utility model are described in further detail below. It should be understood that the description herein of the embodiments of the utility model is not intended to limit the scope of the utility model.
Fig. 1 to 2 are schematic structural diagrams of a high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio. The high efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio comprises a dephosphorization and denitrification system 10, a sewage pipeline 20 arranged on the dephosphorization and denitrification system 10, and a plurality of aeration devices 30 arranged on the dephosphorization and denitrification system 10. It is conceivable that the high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio further comprises other functional modules such as a power supply connection device, an automatic control system and the like, which are known technologies to those skilled in the art, and will not be described herein.
The dephosphorization and denitrification system 10 is formed by combining a plurality of adjacently arranged reaction tanks, and comprises an anaerobic tank 11, an MBBR tank 12 arranged on the water outlet direction of the anaerobic tank 11, an anaerobic ammonia oxidation tank 13 arranged on the water outlet direction of the MBBR tank 12, a facultative tank 14 arranged on the water outlet direction of the anaerobic ammonia oxidation tank 13, an efficient sedimentation tank 15 arranged on the water outlet direction of the facultative tank 14, a dephosphorization filter 16 arranged on the water outlet direction of the efficient sedimentation tank 15, and a modified MBBR filler 17 filled in the anaerobic tank 11, the MBBR tank 12 and the facultative tank 14.
A fixed packed bed 111 and a water distributor 112 arranged at the bottom of the anaerobic tank 11 are arranged in the anaerobic tank. The fixed packed bed 111 is formed by respectively fixing two permeable supporting plates on a support welded with a pool wall, so that the modified MBBR packing 17 is filled in the fixed packed bed 111 and dephosphorization is carried out with sewage in an anaerobic environment. The upper permeable supporting plate arranged far away from the water distributor 112 is connected with the support by a fastener so as to facilitate the replacement of the modified MBBR packing 17 filled in the fixed packing bed 111. The anaerobic tank 11 is used for water inflow at the bottom and water outflow at the top. The water distributor 112 is connected to the water inlet to uniformly flow water, so that the reaction is faster. An overflow pipe is connected to the water outlet to enable the reacted water to flow to the MBBR tank 12.
The MBBR tank 12 is provided with a first baffle plate 121 at the water outlet end, a second baffle plate 122 spaced from the first baffle plate 121, and a filter plate 123 disposed between the first baffle plate 121 and the second baffle plate 122. Baffles are plates for changing the direction of fluid flow, and are known per se to those skilled in the art, and therefore the materials and functions thereof will not be described in detail herein. One end of the first baffle plate 121 is fixed on the top of the MBBR tank 12, and the free end extends towards the bottom of the MBBR tank 12. One end of the second deflector 122 is fixed at the bottom of the MBBR tank 12, and the free end extends toward the top of the MBBR tank 12. The first baffle plate 121 and the second baffle plate 122 are both located at one side of the MBBR tank 12 near the water outlet, and the second baffle plate 122 is closer to the water outlet, so that a longer water flow channel is formed at the water outlet of the MBBR tank 12, so that a sewage pipeline is conveniently arranged. The filter plate 123 is disposed at an end of the free end of the first baffle plate 121 and connects the first baffle plate 121 and the second baffle plate 122 at the same time to prevent the filler from overflowing.
The anaerobic ammonia oxidation tank 13 is water inlet at the bottom and water outlet at the top. The water distributor 112 is provided at the bottom of the tank in the same manner as the anaerobic tank 11, and a description thereof will not be repeated. The anaerobic ammonia oxidation tank 13 is provided with a pair of guide plates 131 positioned on the tank wall, a positive and negative pressure protector 132 arranged on the tank top, and a three-phase separator 133 connected with the positive and negative pressure protector 132. The baffle 131 is essentially a baffle plate and is positioned on the tank wall near the three-phase separator 133. The positive and negative pressure protector 132 is a device installed on a sealing apparatus, and serves as a protection means for preventing safety accidents when positive and negative pressures are generated inside the apparatus, and the three-phase separator 133 is used for separating oil, water and gas from the fluid and accurately weighing the oil, water and gas, which are all known in the art, and will not be described in detail herein.
The facultative tank 14 is provided with a baffle structure that is the same as that of the MBBR tank 12, and the baffle structure is turned over in the horizontal direction to adapt to the position of the water outlet, so that the description is omitted here.
The efficient sedimentation tank 15 is characterized in that the efficient sedimentation tank is formed by water inlet at the top and water outlet at the top, and comprises a water inlet mixer 151 arranged at the water inlet end, a plurality of inclined pipes 152 arranged at the center of the efficient sedimentation tank 15, four mud storage hoppers 153 arranged at the bottom of the efficient sedimentation tank, an overflow weir 154 arranged at the water outlet end, and a dephosphorization agent adding device 155 arranged at the water inlet mixer 151. The water inlet mixer 151 is disposed on the inner wall of the efficient sedimentation tank 15 and is located at the water inlet to mix the water inlet and the dephosphorizing agent uniformly. The inclined tube 152 is disposed in a sedimentation area inside the efficient sedimentation tank 15, so that suspended impurities in water are precipitated in the inclined tube 152, water flows upward along the inclined plate or the inclined tube, separated sludge slides down to the bottom of the tank along the inclined tube 152 under the action of gravity, and is discharged in a concentrated manner, and the inclined tube sedimentation tank designed according to the shallow tank theory is a prior art applied to the technical field of sewage treatment, and is well known to those skilled in the art, so that detailed description is not provided herein. The sludge storage hoppers 153 have a funnel-shaped structure, and the bottoms of the four sludge storage hoppers 153 are communicated to collect sludge. The overflow weir 154 is disposed at the water outlet of the high efficiency sedimentation tank 15 to collect the supernatant liquid after the mud-water separation and discharge the supernatant liquid from the water outlet. The dephosphorization agent adding device 155 is composed of an agent adding tank, a metering pump, a valve, a pipeline pipe fitting and the like, the dephosphorization agent is mainly ferric salt or aluminum salt, and the outlet end of the dephosphorization agent adding device 155 is positioned above the water inlet mixer 151 so as to ensure that the dephosphorization agent and the water inlet are uniformly mixed.
The dephosphorization filter 16 is characterized by bottom water inlet and top water outlet, and comprises a dephosphorization filter layer 161, a sand filter layer 162 and a sludge discharge valve 163 arranged at the bottom of the filter. The dephosphorization filter layer 161 is filled with special dephosphorization filler, and the surface is coated with Fe/Mn oxide, so that phosphate substances in water can be efficiently enriched. The sand filter layer 162 is in a modularized design, each filter brick is about 0.4-6 m long, about 0.2-0.3 m wide and about 0.2-0.3 m thick, and is connected by adopting an assembling lock catch, and the lock catch is made of PE or HDPE. The dephosphorization filtering layer 161 and the sand filtration filtering layer 162 are both made of water permeable supporting plates as frames, so that water flow can pass through while filling materials are placed. The sludge discharge valve 163 is provided on the wall of the dephosphorization filter 16 far from the water inlet and near the bottom of the tank for discharging sludge in the tank.
The modified MBBR filler 17 is based on the use of MBBR filler, and by using, for example, mineral filler as filler and modifier, not only can the raw material cost of plastic products be significantly reduced, but also the properties of plastics can be effectively improved. MBBR filler is a microbial carrier applied in MBBR technology, mainly providing an environment suitable for the growth of microorganisms. The above-mentioned techniques are widely used in the field of water purification technology, and should be known to those skilled in the art, and therefore, only a brief description thereof will be given herein. The modified MBBR packing 17 is made of PE/HDPE and the like, has a diameter of 6-10 cm, has a packing ratio of 40-60% in the anaerobic tank 11, and has packing ratios of 30-60% in the MBBR tank 12 and the facultative tank 14. The MBBR filler in the MBBR tank 12 is in an aerobic or anoxic environment because a biological film is formed on the MBBR filler, and oxygen molecules in water are easily contacted with the outer layer of the biological film during aeration; the inner layer of the biological film is more similar to an anaerobic or anoxic environment because most of oxygen is consumed by microorganisms at the outer layer. In the anaerobic tank 11, the tank is filled with MBBR filler, and the surface of the tank is adhered with a biofilm, and the outer layer of the tank can be contacted with the mixed liquid carrying part of dissolved oxygen which flows back from the MBBR tank, so that the outer layer of the biofilm is mainly in an anoxic environment, and the inner layer of the tank cannot be contacted with oxygen molecules, so that the tank is in an anaerobic environment. Thereby, by creating an anaerobic and anoxic alternate environment for the modified MBBR packing 17, the denitrifying phosphorus removal bacteria are domesticated and enriched on the packing, the denitrifying phosphorus removal bacteria can take nitrate as an electron acceptor, and the denitrification and phosphorus accumulation can be realized in the same environment by utilizing a carbon source in sewage, so that the carbon source is saved, and the yield of residual sludge is greatly reduced.
The sewage pipeline 20 comprises a water inlet pipe 21 in the water inlet direction of the anaerobic tank 11, an overrun pipe 22 arranged between the anaerobic tank 11 and the anaerobic ammonia oxidation tank 13, a mixed liquor return pipe 23 arranged between the MBBR tank 12 and the water inlet pipe 21, and a sludge return pipe 24 arranged between the high-efficiency sedimentation tank 15 and the facultative tank 14. One end of the overrun pipe 22 is arranged at the water outlet end of the anaerobic tank 11, and the other end of the overrun pipe is arranged at the water inlet end of the anaerobic ammonia oxidation tank 13, so that 40-50% of the water discharged from the anaerobic tank 11 directly enters the anaerobic ammonia oxidation tank 13 and is mixed with the water discharged from the MBBR tank 12, at the moment, ammonia nitrogen in the water discharged from the anaerobic tank 11 and NO 2-and NO 3-in the water discharged from the MBBR tank 12 are converted into N2 under the action of anaerobic ammonia oxidation bacteria, and biological denitrification is further realized. One end of the mixed liquor return pipe 23 is arranged at the water outlet end of the MBBR tank 12, and the other end of the mixed liquor return pipe is arranged at the water inlet pipe 21, so that the water outlet of the MBBR tank 12 is returned to the front end of the anaerobic tank 11 to be mixed with the water inlet, and an anaerobic and anoxic alternate environment is created for the modified MBBR filler 17. One end of the sludge return pipe 24 is connected to the bottom of the efficient sedimentation tank 15, and the outlet end is respectively connected to the bottom of the facultative tank 14 and a sludge discharge port, so that part of sludge is returned to the facultative tank 14 and the rest of sludge is discharged.
The aeration device 30 comprises an aerator 31 arranged at the bottom of the tank, an aeration fan 32 arranged outside the tank, and an aeration pipe 33 connecting the aerator 31 and the aeration fan 32. The aerator 31 may be a tube, a disc or a perforated aerator pipe, and the aeration fan are known in the art, and will not be described in detail herein. The aeration device 30 is arranged at the bottom of the MBBR tank 12 and the facultative tank 14 respectively to perform aeration function in the tanks.
Compared with the prior art, the high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio provided by the utility model has the advantages that the anaerobic tank 11 and the MBBR tank 12 are arranged, the modified MBBR filler 17 is filled, the aeration device 30 is used, the mixed liquor return pipe 23 is arranged to return sewage, the denitrification dephosphorization technology is adopted, the anaerobic and anoxic alternate environment is created for the modified MBBR filler 17, so that denitrification dephosphorization bacteria are domesticated and enriched on the filler, the denitrification dephosphorization bacteria can take nitrate as an electron acceptor, denitrification and phosphorus accumulation are realized in the same environment by utilizing a carbon source in sewage, the carbon source is saved, and the yield of residual sludge is greatly reduced. Meanwhile, through the arrangement of the anaerobic ammonia oxidation tank 13 and the overrun pipe 22, the NO2-N generated by converting NO3-N by denitrifying phosphorus removal bacteria and NH4-N in sewage are converted into N2 under the metabolism of anaerobic ammonia oxidation bacteria by adopting a denitrification phosphorus removal and anaerobic ammonia oxidation coupling process, so that synchronous denitrification and phosphorus removal are realized. Finally, by arranging the efficient sedimentation tank 15 and the dephosphorization filter tank 16, the phosphate substances left after biochemical treatment are mixed with a small amount of efficient dephosphorization reagent by adopting an enhanced chemical dephosphorization process, and are subjected to coagulating sedimentation in the efficient sedimentation tank 15, and the effluent is subjected to dephosphorization filter tank 16 filled with dephosphorization filler, so that enhanced dephosphorization is realized, reagent dosage is reduced, and effluent is ensured to reach the standard stably.
The above is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model, and any modifications, equivalent substitutions or improvements within the spirit of the present utility model are intended to be covered by the claims of the present utility model.
Claims (8)
1. High-efficient dephosphorization denitrification system suitable for low carbon nitrogen ratio, its characterized in that: the high-efficiency dephosphorization and denitrification system suitable for low carbon nitrogen ratio comprises a dephosphorization and denitrification system, a sewage pipeline arranged on the dephosphorization and denitrification system, and a plurality of aeration devices arranged on the dephosphorization and denitrification system, wherein the dephosphorization and denitrification system comprises an anaerobic tank, an MBBR tank arranged on the water outlet direction of the anaerobic tank, an anaerobic ammonia oxidation tank arranged on the water outlet direction of the MBBR tank, an anaerobic tank arranged on the water outlet direction of the anaerobic ammonia oxidation tank, an efficient sedimentation tank arranged on the water outlet direction of the anaerobic tank, a dephosphorization filter tank arranged on the water outlet direction of the efficient sedimentation tank, a modified MBBR filler filled in the efficient sedimentation tank, wherein the efficient sedimentation tank is top water inlet and top water outlet, and comprises a water inlet mixer arranged at the water inlet end, a plurality of inclined pipes arranged at the center of the efficient sedimentation tank, four inclined pipes arranged at the center of the anaerobic sedimentation tank, a water inlet pipe and a water outlet weir arranged at the water inlet end of the anaerobic sedimentation tank, a water inlet pipe arranged between the water inlet pipe and the water outlet pipe of the anaerobic sedimentation tank, an overflow pipe arranged at the water inlet end of the anaerobic sedimentation tank, a sewage pipe arranged between the water inlet pipe and the sewage pipe arranged at the water outlet end of the anaerobic sedimentation tank, and the sewage pipe arranged at the water inlet pipe and the water inlet pipe, and the water inlet pipe arranged at the water inlet pipe, and the water inlet pipe arranged between the sewage inlet pipe and the sewage pipe and the water inlet pipe, and one end of the mixed liquor return pipe is arranged at the water outlet end of the MBBR tank, the other end of the mixed liquor return pipe is arranged at the water inlet pipe, one end of the sludge return pipe is connected with the bottom of the efficient sedimentation tank, and the outlet end of the sludge return pipe is respectively connected with the bottom of the facultative tank and a sludge discharge port.
2. The efficient dephosphorization and denitrification system for low carbon nitrogen ratio according to claim 1, wherein: the anaerobic tank is internally provided with a fixed packed bed and a water distributor arranged at the bottom of the tank, the anaerobic tank is used for feeding water from the bottom and discharging water from the top, the water inlet is connected with the water distributor, and the water outlet is connected with an overflow pipe.
3. The efficient dephosphorization and denitrification system for low carbon nitrogen ratio according to claim 1, wherein: the MBBR pond is that top water inflow, bottom go out water to be provided with a first deflector at the play water end, a with the second deflector that first deflector interval set up, and one set up first deflector with the filter between the second deflector.
4. The efficient dephosphorization and denitrification system for low carbon nitrogen ratio according to claim 3, wherein: the first baffle plate and the second baffle plate are both positioned on one side of the MBBR tank, which is close to the water outlet, and the second baffle plate is closer to the water outlet, and the filter plate is arranged at the end part of the free end of the first baffle plate and is simultaneously connected with the first baffle plate and the second baffle plate.
5. The efficient dephosphorization and denitrification system for low carbon nitrogen ratio according to claim 1, wherein: the anaerobic ammonia oxidation tank is characterized in that water enters from the bottom and water exits from the top, a pair of guide plates positioned on the tank wall, a positive and negative pressure protector arranged on the tank top, and a three-phase separator connected with the positive and negative pressure protector are arranged.
6. The efficient dephosphorization and denitrification system for low carbon nitrogen ratio according to claim 1, wherein: the modified MBBR filler is made of PE or HDPE, has the diameter of 6-10 cm, has the filling rate of 40-60% in the anaerobic tank, and has the filling rate of 30-60% in the MBBR tank and the facultative tank.
7. The efficient dephosphorization and denitrification system for low carbon nitrogen ratio according to claim 1, wherein: the aeration device comprises an aerator arranged at the bottom of the tank, an aeration fan arranged outside the tank, and an aeration pipe connected with the aerator and the aeration fan.
8. The efficient dephosphorization and denitrification system with low carbon nitrogen ratio according to claim 7, wherein: the aerator is one of a tubular type, a disc type or a perforated aerator pipe, and the aeration devices are respectively arranged at the bottoms of the MBBR tank and the facultative tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321802029.2U CN220245840U (en) | 2023-07-10 | 2023-07-10 | High-efficient dephosphorization denitrification system suitable for low carbon-nitrogen ratio |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321802029.2U CN220245840U (en) | 2023-07-10 | 2023-07-10 | High-efficient dephosphorization denitrification system suitable for low carbon-nitrogen ratio |
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| CN220245840U true CN220245840U (en) | 2023-12-26 |
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| CN202321802029.2U Active CN220245840U (en) | 2023-07-10 | 2023-07-10 | High-efficient dephosphorization denitrification system suitable for low carbon-nitrogen ratio |
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| Country | Link |
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| CN (1) | CN220245840U (en) |
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2023
- 2023-07-10 CN CN202321802029.2U patent/CN220245840U/en active Active
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