CN213680270U - Enhanced nitrogen and phosphorus removal system with MBBR (moving bed biofilm reactor) improved Obel oxidation ditch - Google Patents
Enhanced nitrogen and phosphorus removal system with MBBR (moving bed biofilm reactor) improved Obel oxidation ditch Download PDFInfo
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- CN213680270U CN213680270U CN202022147697.9U CN202022147697U CN213680270U CN 213680270 U CN213680270 U CN 213680270U CN 202022147697 U CN202022147697 U CN 202022147697U CN 213680270 U CN213680270 U CN 213680270U
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- 230000003647 oxidation Effects 0.000 title claims abstract description 57
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 57
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 46
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 40
- 239000011574 phosphorus Substances 0.000 title claims abstract description 40
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 23
- 238000004062 sedimentation Methods 0.000 claims abstract description 31
- 239000000945 filler Substances 0.000 claims abstract description 18
- 230000006872 improvement Effects 0.000 claims abstract description 14
- 238000005273 aeration Methods 0.000 claims abstract description 5
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 claims abstract 7
- 238000005192 partition Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000005189 flocculation Methods 0.000 claims description 7
- 230000016615 flocculation Effects 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000004891 communication Methods 0.000 claims description 2
- 239000010802 sludge Substances 0.000 abstract description 25
- 239000010865 sewage Substances 0.000 abstract description 21
- 239000007788 liquid Substances 0.000 abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 238000010992 reflux Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 244000005700 microbiome Species 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 229910052760 oxygen Inorganic materials 0.000 description 12
- 239000001301 oxygen Substances 0.000 description 12
- 241000894006 Bacteria Species 0.000 description 11
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000000701 coagulant Substances 0.000 description 6
- 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 5
- 230000001546 nitrifying effect Effects 0.000 description 5
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- 239000002028 Biomass Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 235000006506 Brasenia schreberi Nutrition 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
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- 239000013043 chemical agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000004783 oxidative metabolism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to an obel oxidation ditch with MBBR improvement reinforces nitrogen and phosphorus removal system belongs to sewage treatment technical field. The nitrogen and phosphorus removal system include that the anaerobism selects pond, the orbel oxidation ditch of improvement, two sink ponds and high-efficient sedimentation tank, set up aeration equipment in the orbel oxidation ditch inner channel and the well ditch of improvement to throw the MBBR filler, improved the microorganism concentration that the unit pond holds, strengthen the unit pond and hold the throughput, through with the mixed liquid reflux of interior ditch partial sludge outer channel, and throw the carbon source at outer channel, strengthen the denitrification denitrogenation effect, the utility model discloses combine together biological phosphorus removal and chemical phosphorus removal, strengthen the phosphorus removal effect. The utility model discloses can be used to conventional oeber oxidation ditch system carry mark transformation, have that construction cycle is short, the engineering volume is less, the advantage of engineering investment is low.
Description
Technical Field
The utility model relates to an obel oxidation ditch with MBBR improvement reinforces nitrogen and phosphorus removal system belongs to sewage treatment technical field.
Background
The Obel oxidation ditch process is widely applied in China, is particularly most common in small and medium-sized sewage treatment plants, and has the advantages fully shown and recognized. The Ohbell oxidation ditch adopts a concentric multi-ditch series system, sewage firstly enters from an outer ditch, then sequentially enters into a middle ditch and an inner ditch, and finally flows out from a central island positioned in the center and enters into a secondary sedimentation tank. The outer channel mainly has the function of removing organic matters and total nitrogen by denitrification, the volume of the outer channel usually accounts for 50% of the total volume of the Obel oxidation channel, the middle channel is a transition section connecting the outer channel and the inner channel and further removing the residual organic matters, the volume of the middle channel usually accounts for 30% of the total volume, the inner channel mainly has the function of removing ammonia nitrogen by nitrification, meanwhile, the effluent is ensured to have enough dissolved oxygen to enter a secondary sedimentation tank and inhibit the release of phosphorus, and the volume of the inner channel accounts for about 20% of the total volume.
The conventional Obel oxidation ditch process does not have the backflow of sludge mixed liquor, and can not cause the nitrifying liquid to flow back to an outer channel to carry out denitrification reaction, so that the total nitrogen of effluent is higher. The MBBR (Moving Bed Biofilm Reactor) process belongs to a novel sewage Biofilm process treatment process, and biomass and biological species in a biological tank are improved by adding a certain amount of suspension carriers into the biological tank, so that the treatment efficiency of the biological tank is improved. In recent years, in order to respond to the requirements of national environmental protection, energy conservation and emission reduction, more and more discharge standards of effluent water quality of urban sewage treatment plants are upgraded from primary B standard in the original discharge standard of pollutants for urban sewage treatment plants GB18918-2002 to primary A standard, and a plurality of provinces and cities successively establish local standards which are stricter than the national standard.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an with the total nitrogen of effluent quality and total phosphorus conventional Oebel oxidation ditch system can not satisfy the defect that quality of water required when having higher requirement, provide a denitrogenation dephosphorization system is reinforceed to the Oebel oxidation ditch with the MBBR improvement, be adapted to reform transform conventional Oebel oxidation ditch system, improve total nitrogen and total phosphorus clearance to satisfy the improvement of water quality standard.
The utility model discloses a realize through following technical scheme: the utility model provides a system for removing nitrogen and phosphorus is reinforceed to olber oxidation ditch with MBBR improvement, nitrogen and phosphorus removal system include biochemical treatment unit and precipitation reaction unit, biochemical treatment unit include anaerobism selection pond and improved olber oxidation ditch, improved olber oxidation ditch divide into outer channel, well channel and interior channel, separate through the partition wall between each channel, be equipped with the drill way that makes adjacent channel communicate in the partition wall, set up the agitator in the anaerobism selection pond, improvement olber oxidation ditch outer channel in set up the propeller, improvement olber oxidation ditch in channel and interior channel set up propeller, MBBR filler and aeration equipment, improvement olber oxidation ditch outer channel and interior channel communicate through the pipeline, precipitation reaction unit include secondary sedimentation tank and high-efficient sedimentation tank, high-efficient sedimentation tank include coagulation zone, A flocculation zone and a sedimentation zone.
An enhanced nitrogen and phosphorus removal system of an improved MBBR (moving bed biofilm reactor) Obel oxidation ditch comprises the following processes:
(1) biochemical treatment: the sewage to be treated sequentially passes through an anaerobic selective tank and an improved external channel of the Ohbell oxidation ditch, the sludge and the sewage which flow back to the anaerobic selection tank from the secondary sedimentation tank are uniformly mixed by the stirrer in the anaerobic selection tank, phosphorus accumulating bacteria carry out anaerobic phosphorus release under anaerobic conditions, nitrifying bacteria convert ammonia nitrogen in the sewage into nitrate nitrogen under aerobic conditions under the combined action of activated sludge in the improved Obel oxidation ditch and MBBR fillers, part of sludge mixed liquor rich in the nitrate nitrogen flows back to the outer ditch of the improved Obel oxidation ditch, denitrifying bacteria in the activated sludge in the outer ditch fully utilize a carbon source in inlet water and an external carbon source to carry out denitrification under the anoxic conditions, most of total nitrogen in the sewage is removed, the phosphorus accumulating bacteria in the improved Obel oxidation ditch excessively take phosphate under the aerobic conditions, and the phosphorus accumulating bacteria excessively absorbing the phosphorus in the sludge precipitated in the secondary sedimentation tank are discharged out of the system along with the residual sludge;
(2) precipitation reaction: the sewage treated in the step (1) enters a secondary sedimentation tank, supernatant of the secondary sedimentation tank enters a high-efficiency sedimentation tank, one part of precipitated sludge in the secondary sedimentation tank flows back to the front end of an anaerobic selection tank, the other part of the precipitated sludge is discharged as residual sludge, the high-efficiency sedimentation tank is divided into a coagulation area, a flocculation area and a sedimentation area, a coagulant is added into the coagulation area, the sewage and the coagulant are quickly mixed and stirred through quick stirring, the coagulant reacts with soluble phosphorus in the sewage to generate sediment, the soluble phosphorus in the water is removed, a flocculating agent is added into the flocculation area to form flocculating constituents easy to settle, the sewage enters the sedimentation area after passing through the flocculation area, large flocculating constituents easy to settle quickly settle, small flocculating constituents difficult to settle are removed through inclined tube sedimentation, one part of precipitated sludge at the bottom of the sedimentation area flows back to the flocculation area from the sedimentation area, and the other part of the precipitated sludge is discharged out of.
In the technical scheme, the interception nets for blocking MBBR fillers from passing are arranged at the communication holes of the outer channel, the middle channel and the inner channel of the improved Ohbel oxidation ditch, so that the MBBR fillers always exist in the inner channel and the middle channel of the improved Ohbel oxidation ditch.
In the technical scheme, the concentration of dissolved oxygen in the anaerobic selective tank is controlled to be below 0.2mg/L so as to ensure that phosphorus is released by phosphorus-accumulating bacteria under anaerobic conditions.
In the technical scheme, the concentration of dissolved oxygen in the improved channel in the Obel oxidation ditch is 1.5-3 mg/L, a biological film on the surface of the MBBR filler can grow a large amount of various microorganisms under an aerobic condition, the biomass in a unit volume is improved, the nitrification load is obviously improved, the adding amount of the MBBR filler can be adjusted, and different effluent quality standards can be met; the concentration of dissolved oxygen in the middle channel is 0.8 mg/L-1.5 mg/L, and a large amount of anaerobic or facultative microorganisms can grow on the surface of the MBBR filler to perform synchronous nitrification and denitrification; the concentration of dissolved oxygen in the outer channel is 0.2 mg/L-0.5 mg/L, denitrifying bacteria fully utilize a carbon source and an external carbon source in the inlet water to carry out denitrification and remove most of total nitrogen in the water, and the reflux ratio of the sludge mixed liquor from the inner channel to the outer channel is 150-250%.
Compare with conventional obel oxidation ditch system, the utility model discloses the beneficial technological effect who brings:
the utility model provides a pair of with diber oxidation ditch enhanced nitrogen and phosphorus removal system of MBBR improvement, throw the MBBR filler in channel and the middle channel in the diber oxidation ditch of improvement, the microbial concentration that has improved the unit pond and hold the throughput with the unit pond, the shock resistance load capacity of reinforcing system, through with the mixed liquid reflux of interior channel part mud outer channel, and throw the carbon source at outer channel, strengthen the denitrification process, channel dissolved oxygen concentration in the control, the synchronous nitrification denitrification can take place for middle channel MBBR filler surface biomembrane, total nitrogen of effluent and ammonia nitrogen can reduce to lower level.
The utility model discloses combine together biological dephosphorization and chemical dephosphorization, it hardly receives nitrate nitrogen and dissolved oxygen inhibitory action to gather phosphorus fungus in the pond is selected in the anaerobism, it inhales phosphorus and releases the phosphorus process and effectively goes on in the anaerobism selects pond and the Ohbel oxidation ditch inner channel of improvement, can show and reduce the total phosphorus of oxidation ditch effluent, throw the coagulant simultaneously in high-efficient sedimentation tank, further get rid of total phosphorus, satisfy the total phosphorus emission standard of effluent, biological dephosphorization and chemical dephosphorization combine together, reducible chemical agent quantity, reduce the sewage treatment cost.
The utility model discloses to the conventional Ohbell oxidation ditch system that is moving, change former system slightly when carrying the standard transformation to increase partial processing unit and can satisfy quality of water target demand, have that construction cycle is short, the engineering volume is less, the advantage that the engineering investment is low, be worth promoting.
Drawings
FIG. 1 is a flow chart of the improved Ohbel oxidation ditch nitrogen and phosphorus removal system of the present invention.
Fig. 2 is a schematic plan view of the improved obel oxidation ditch of the present invention.
Fig. 3 is a schematic cross-sectional view of the outer channel, the middle channel and the inner channel of the improved obel oxide trench of the present invention.
In the figure: the device comprises an improved external channel of an Ohbell oxidation ditch, an improved middle channel of the Ohbell oxidation ditch, an improved internal channel of the Ohbell oxidation ditch, a partition wall, an external channel-to-middle channel communicating orifice, a middle channel-to-internal channel communicating orifice, a central island, a sludge mixed liquid internal reflux system, an external carbon source adding system, an MBBR packing, a propeller and an aeration device, wherein the improved external channel of the Ohbell oxidation ditch is 1, the improved internal channel of the Ohbell oxidation ditch is 3, the partition wall is 4, the external channel-to-middle channel communicating orifice is.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
Example (b):
an enhanced nitrogen and phosphorus removal system of an improved Obel oxidation ditch by using MBBR (moving bed biofilm reactor), wherein sewage to be treated sequentially passes through an anaerobic selection tank, the improved Obel oxidation ditch, a secondary sedimentation tank and a high-efficiency sedimentation tank. Setting a stirrer at the bottom of the anaerobic selective tank, uniformly mixing the secondary sedimentation tank sedimentation return sludge with sewage, controlling the concentration of dissolved oxygen in the anaerobic selective tank to be below 0.2mg/L, and controlling the external reflux ratio of the secondary sedimentation tank sludge to be 80-120%; the improved Obel oxidation ditch is divided into an outer channel 1, a middle channel 2 and an inner channel 3, the channels are separated by a partition wall 4, orifices for communicating adjacent channels are arranged in the partition wall, the outer channel is led to a middle channel orifice 5, the middle channel is led to an inner channel orifice 6, the inner channel is led to a central island orifice 7, a propeller 12 is arranged in the outer channel of the improved Obel oxidation ditch, the middle channel and the inner channel are provided with a propeller 12, an MBBR filler 11 and an aeration device 13, the outer channel 1 and the inner channel 3 of the improved Obel oxidation ditch are communicated through a pipeline, the position where the outer channel and the inner channel are communicated preferentially selects the vicinity of the tail ends of the water flow direction of the two channels, sludge mixed liquid rich in nitrate nitrogen is conveyed from the inner channel to the outer channel through a pump, the reflux ratio of the sludge mixed liquid is 150-250%, the dissolved oxygen concentration of the outer channel is 0.2 mg/L-0.5 mg/L, the concentration of dissolved oxygen in the middle channel is 0.8 mg/L-1.5 mg/L, the concentration of dissolved oxygen in the inner channel is 1.5 mg/L-3 mg/L, the concentration of sludge in the improved Obel oxidation channel is 2000 mg/L-6000 mg/L, and the preferred specific surface area of the MBBR filler is more than 500m2/m3The specific gravity is 0.93-0.98, and the filling rate of the MBBR filler in the middle channel and the inner channel is 10-60%; adding coagulant into a coagulation area of the high-efficiency sedimentation tank, preferably adding polyaluminium chloride solution with the effective aluminium content of 10-30%, wherein the adding amount of the polyaluminium chloride solution is 10-60 mg/L, adding flocculating agent into a flocculation area, preferably adding polyacrylamide solution with the mass concentration of 0.1-0.3%, and the adding amount of the polyacrylamide solution is 0.4-1.6 g/L.
And (3) denitrification process: under the combined action of the activated sludge and the suspended filler in the improved Obel oxidation ditch, nitrifying bacteria convert ammonia nitrogen in sewage into nitrate nitrogen under aerobic conditions, a generated high-concentration nitrifying liquid, a part of sludge mixed liquid containing the high-concentration nitrifying liquid flows back to an outer ditch through a pipeline, denitrifying bacteria in the activated sludge in the outer ditch perform denitrifying denitrification by utilizing easily degradable organic matters and an external carbon source in inlet water under an anoxic condition, most of total nitrogen in water is removed, nitrification and denitrification are performed under the combined action of the activated sludge and the suspended filler in the middle ditch, the total nitrogen is further removed, and the denitrification effect is enhanced.
And (3) dephosphorization process: the utility model discloses a biological dephosphorization combines together with chemical dephosphorization, biological dephosphorization process is in the anaerobism selects in the pond to gather phosphorus bacteria and utilizes the internal energy absorption organic matter of storing to store in vivo with the form of gathering-beta-hydroxybutyric acid, utilize molecular oxygen or compound state oxygen oxidative metabolism to store in internal gathering-beta-hydroxybutyric acid, ingest the phosphate excessively in the sewage, the phosphorus bacteria that excessively inhales phosphorus discharges along with surplus sludge, most total phosphorus in the getting rid of sewage, chemical dephosphorization is in high-efficient sedimentation tank, phosphorus reaction through throwing coagulant and solubility generates insoluble phosphate precipitate, further get rid of total phosphorus, strengthen the dephosphorization effect.
It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that the technical solutions of the present invention are modified or substituted with equivalents without departing from the spirit and scope of the technical solutions, and all should be covered by the scope of the claims of the present invention.
Claims (2)
1. The utility model provides a system for removing nitrogen and phosphorus is reinforceed to ox bell oxidation ditch with MBBR improvement, which characterized in that, nitrogen and phosphorus removal system include biochemical treatment unit and precipitation reaction unit, biochemical treatment unit include anaerobism selection pond and improved ox bell oxidation ditch, improved ox bell oxidation ditch divide into outer channel, well channel and interior channel, separate through the partition wall between each channel, be equipped with the drill way that makes adjacent channel communicate in the partition wall, set up the agitator in the anaerobism selection pond, improved ox bell oxidation ditch outer channel in set up the propeller, improved ox bell oxidation ditch in channel and interior channel in set up propeller, MBBR filler and aeration equipment, improved ox bell oxidation ditch outer channel and interior channel communicate through the pipeline, the precipitation reaction unit include secondary sedimentation tank and high-efficient sedimentation tank, high-efficient sedimentation tank include the district thoughtlessly congeal district, A flocculation zone and a sedimentation zone.
2. The enhanced nitrogen and phosphorus removal system of the modified Obel oxidation ditch with the MBBR of claim 1, wherein the interception nets for blocking the MBBR filler from passing through are arranged at the communication holes of the outer channel, the middle channel and the inner channel of the modified Obel oxidation ditch, so that the MBBR filler is always present in the inner channel and the middle channel of the modified Obel oxidation ditch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022147697.9U CN213680270U (en) | 2020-09-27 | 2020-09-27 | Enhanced nitrogen and phosphorus removal system with MBBR (moving bed biofilm reactor) improved Obel oxidation ditch |
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| CN202022147697.9U CN213680270U (en) | 2020-09-27 | 2020-09-27 | Enhanced nitrogen and phosphorus removal system with MBBR (moving bed biofilm reactor) improved Obel oxidation ditch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409083A (en) * | 2022-02-14 | 2022-04-29 | 郑州亿众环境科技有限公司 | Method for upgrading and transforming Obel oxidation ditch |
| CN115504633A (en) * | 2022-10-26 | 2022-12-23 | 青岛万慧源环保科技有限公司 | Ecological system based on EBR technology |
| CN117486437A (en) * | 2024-01-03 | 2024-02-02 | 天津创业环保集团股份有限公司 | Denitrification and dephosphorization system and method suitable for high sludge concentration |
-
2020
- 2020-09-27 CN CN202022147697.9U patent/CN213680270U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114409083A (en) * | 2022-02-14 | 2022-04-29 | 郑州亿众环境科技有限公司 | Method for upgrading and transforming Obel oxidation ditch |
| CN115504633A (en) * | 2022-10-26 | 2022-12-23 | 青岛万慧源环保科技有限公司 | Ecological system based on EBR technology |
| CN117486437A (en) * | 2024-01-03 | 2024-02-02 | 天津创业环保集团股份有限公司 | Denitrification and dephosphorization system and method suitable for high sludge concentration |
| CN117486437B (en) * | 2024-01-03 | 2024-04-12 | 天津创业环保集团股份有限公司 | Denitrification and dephosphorization system and method suitable for high sludge concentration |
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