CN209583900U - A kind of pulling flow type sewage biological treatment system with degassing function - Google Patents
A kind of pulling flow type sewage biological treatment system with degassing function Download PDFInfo
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- CN209583900U CN209583900U CN201822156898.8U CN201822156898U CN209583900U CN 209583900 U CN209583900 U CN 209583900U CN 201822156898 U CN201822156898 U CN 201822156898U CN 209583900 U CN209583900 U CN 209583900U
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Abstract
The utility model discloses a kind of pulling flow type sewage biological treatment systems with degassing function, pre- anoxic pond, anaerobic pond, anoxic pond, anoxic gallery, aerobic gallery and degassing pond including being sequentially communicated setting, reflux pump is equipped in the end in degassing pond, it is additionally provided with the water outlet being connected with the secondary settling tank at rear portion, is equipped with blender in anoxic gallery and degassing pond；Anoxic pond includes the first anoxic pond and the second anoxic pond being disposed adjacent, and reflux gate is equipped in the first anoxic pond and in the second anoxic pond, and reflux pump is connected by pipeline respectively with reflux gate；Aerated conduit is equipped in the bottom of aerobic gallery.The utility model has the function of degassing, both can guarantee good denitrification effect, has reduced water outlet total nitrogen, while will not adversely affect to other effluent index.
Description
Technical field
The utility model relates to technical field of sewage, and in particular to a kind of pulling flow type sewage with degassing function is raw
Object processing system.
Background technique
Containing a large amount of nitrogenous, phosphorus organic matter and inorganic matter in sewage, nitrogen, phosphorus, which are discharged into water body, can cause water body
Eutrophication causes greatly to destroy to the ecological environment of water body.It goes to decontaminate currently, urban wastewater treatment firm generallys use bioanalysis
Nitrogen and phosphorus in water.The principle of denitrogenation is that organic nitrogen under the action of anaerobe, in sewage can be converted into ammonia nitrogen, then
Ammonia nitrogen can be oxidized to nitrate nitrogen and nitrite nitrogen under aerobic condition, finally under anoxic conditions nitrate nitrogen and nitrite nitrogen into
It crosses anti-nitration reaction and becomes nitrogen and removed from sewage.The key of entire denitrification process wants each stage of reaction of strict control
Dissolved oxygen, while to have enough carbon sources and reflux nitrification liquid.
Nitric efficiency is proportional in a certain range with nitrification liquid regurgitant volume.The denitrogenation of many sewage treatment plants at present
Inefficient, main cause is exactly that mixed liquid recycle ratio is smaller, but increase nitrification liquid regurgitant volume can take a large amount of dissolved oxygen to
In anoxic pond, the anaerobic environment in anoxic pond is caused to be affected, while regurgitant volume increase can also make sewage in anoxic pond
Shorter residence time: since residence time of the sewage in anoxic pond is equal to anoxic pool volume divided by flow, anoxic pool volume is not
Becoming, flow increases, then the residence time shortens, and it ultimately causes anti-nitration reaction and is not thorough, nitrogen removal rate decline.A part of sewage
It is larger to solve mixed liquid recycle ratio that treatment plant can increase anoxic section hydraulic detention time by way of increasing anoxic pool volume
When the halfway problem of denitrification, even if the residence time increases, the dissolved oxygen content in most of region is not achieved in anoxic pond
Anoxia condition, anti-nitration reaction still can not be carried out well；There are also some sewage treatment plants can be dense by reducing aerobic section dissolved oxygen
Degree is to reduce the dissolved oxygen content that nitrification liquid carries, but on the one hand aerobic section dissolution hypoxgia will lead to nitration reaction and be not thorough,
The removal of organic matter and phosphorus can also be adversely affected, even result in water outlet and discharge standard requirement is not achieved.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of pulling flow type Sewage Biological Treatments with degassing function
System can reduce dissolved oxygen concentration in the nitrification liquid of reflux, guarantee anoxic pond always while improving mixed liquid recycle ratio
Good anaerobic environment is kept, guarantees good denitrification effect.
In order to solve the above technical problems, the utility model adopts the following technical solution:
Design a kind of pulling flow type sewage biological treatment system with degassing function, the pre- anoxic including being sequentially communicated setting
Pond, anaerobic pond, anoxic pond, anoxic gallery, aerobic gallery and degassing pond,
It is equipped with reflux pump in the end in the degassing pond, the water outlet being connected with the secondary settling tank at rear portion is additionally provided with, in institute
It states in anoxic gallery and degassing pond and is equipped with blender；The anoxic pond includes the first anoxic pond and the second anoxic being disposed adjacent
Pond is equipped with reflux gate, the reflux pump and the reflux gate point in first anoxic pond and in the second anoxic pond
It is not connected by pipeline；Aerated conduit is equipped in the bottom of the aerobic gallery.
In the above-mentioned technical solutions, after sewage to be processed enters biological treatment system, pre- anoxic pond, anaerobism are passed sequentially through
Pond, the first anoxic pond, the second anoxic pond, anoxic gallery, aerobic gallery and degassing pond, the first anoxic pond, the second anoxic pond and
Sewage carries out hypoxia response in anoxic gallery, flows into first to fourth aerobic gallery by anoxic gallery and carries out aerobic reaction, good
Aerated conduit is set in oxygen gallery, carries out blast aeration, sufficient gas is provided for aerobic reaction；It is flowed again after the completion of aerobic reaction
Enter the pond that deaerates to be de-gassed, without aeration in degassing pond, during water flow stationary flowing, the gas in water voluntarily takes off
From the dissolved oxygen in water is released, and reduces the dissolved oxygen concentration in water, and water a part after degassing passes through reflux pump reflux
To anoxic pond, nitrification liquid is provided for anti-nitration reaction, another part enters secondary settling tank and carries out post precipitation processing.
The utility model is released the dissolved oxygen in water by the pond that deaerates, oxygen concentration to be dissolved be discharged again after reducing and
Reflux, therefore dissolved oxygen content not will increase in the nitrification liquid to flow back, when regurgitant volume is larger, anoxic pond can also be always maintained at
Good anaerobic condition maintains higher denitrification rate.It therefore, can be with using the biological treatment system in the utility model
Mixed liquid recycle ratio is greatly improved, and then dissolved oxygen concentration is effectively reduced in the nitrification liquid for improving nitric efficiency, while flowing back,
A large amount of dissolved oxygen will not be taken in anoxic pond because nitrification liquid regurgitant volume increases, cause anaerobic environment in anoxic pond by
It influences；Dissolved oxygen mean concentration can decline 0.75mg/L in degassing pond, so that dissolved oxygen concentration is protected in the water outlet in degassing pond
Hold in 1.5mg/L or so, into secondary settling tank after will not cause because of the too low generation anaerobic reaction of dissolved oxygen digestion or on
It is floating.
Preferably, the pre- anoxic pond, anaerobic pond, the first anoxic pond and the second anoxic pond are rectangle, and width edge one
End is successively adjacent, and the anoxic gallery and aerobic gallery are parallel to the pre- anoxic pond, anaerobic pond, the first anoxic pond and second and lack
The length sides in oxygen pond are arranged, and the anoxic gallery is adjacent with the pre- anoxic pond, anaerobic pond, the length sides of anoxic pond.
Preferably, the aerobic gallery includes successively being parallel to anoxic gallery setting and to be sequentially connected logical first good
Oxygen gallery, the second aerobic gallery, the aerobic gallery of third and the 4th aerobic gallery, the first aerobic gallery and the anoxic gallery
It is connected, the 4th aerobic gallery end is connected with the degassing pond.
Aerobic gallery successively parallel structure setting in this way, can make the length of each aerobic gallery reduce, but again
It can guarantee stop reaction time of the water flow in aerobic gallery, carry out sufficient aerobic reaction.The whole life formed in this way
Object treatment tank body structure can either save floor occupying area, and can guarantee stopping for sewage in each stage in limited pond body size
Stay the reaction time.
Preferably, the pre- anoxic pond, anaerobic pond, the first anoxic pond, the second anoxic pond, anoxic gallery, aerobic gallery, de-
Gas pond collectively constitutes the biological treatment pond body an of rectangle；The length of the biological treatment pond body is equal to the pre- anoxic pond, detests
The width in the sum of oxygen pond, the first anoxic pond, the length of the second anoxic pond, the biological treatment pond body is equal to second anoxic
The sum of pond, anoxic gallery and width of four aerobic gallerys.
Preferably, the turning type pond that the shape in the degassing pond is made of laterally deaerate gallery and longitudinal degassing gallery
Body, the laterally degassing gallery is adjacent with the described 4th aerobic gallery end and is connected to, longitudinal degassing gallery and the cross
It is arranged and is connected to the ending vertical of degassing gallery；The length phase of the anoxic gallery and the first, second, third aerobic gallery
It is equal to the length of biological treatment pond body Deng the sum of length of, the 4th aerobic gallery and the laterally degassing gallery, it is described vertical
It is equal to the width of biological treatment pond body to the sum of the length of degassing gallery and the width of the pre- anoxic pond；In the laterally degassing
Blender is equipped in gallery and longitudinal degassing gallery.
Such degassing pool structure is arranged so that reflux is more convenient, makes full use of the space of biological tank, is conducive to save
Occupied area saves space, reduces pond body and builds cost；Sewage is 1.4h in the pre- anoxic pond residence time, in anaerobic pond
Residence time is 1.5h, is 5.5h in anoxic pond and anoxic gallery residence time, is 9-9.5h, In in the aerobic gallery residence time
The residence time in degassing pond is 0.5-1h.The residence time in degassing pond is designed as 0.5-1h, can effectively ensure that aerobic gallery dissolution
The release of oxygen.
Preferably, it is respectively equipped with training wall group in the pre- anoxic pond, anaerobic pond, the first anoxic pond, the second anoxic pond,
The training wall group includes the straight type training wall that two arc training walls are located between two arc training walls, described two arcs
The inside cambered surface of training wall is oppositely arranged.Training wall can reduce impact of the water flow to wall, protect with it to buffering and guide functions
Water flow is demonstrate,proved in the intracorporal flowing time in each pond.
Preferably, the reflux pump is submersible axial flow pump, and model VUP0501 ME185/8-42, metered flow is
520L/s, rated head 1m.
Preferably, underwater scooter, model SB2224 are equipped in the pre- anoxic pond, anaerobic pond, anoxic pond
A40/4, rated power 4kW, rated speed 56r/min.
Preferably, the blender being arranged in the anoxic gallery and degassing pond is vertical air foil profile blender, model
FQM4000/9.0-2.2-JL, rated power 2.2KW, rated speed 10r/min.
Underwater scooter can guarantee that water flow is flowed according to set direction, can also adjust water flow velocity by underwater scooter
Degree.Vertical air foil profile blender is vertical stirrer, it is ensured that anoxic gallery and dehydration pond sludge are uniformly mixed, and furthermore this is stirred
It is low with power consumption to mix device, mixing effect is good, motor advantage easy to repair on the water surface.The blender can also be run with gap,
The sludge concentration of return digestion liquid can be increased, improve nitric efficiency, promote effluent quality, while the fortune of reflux pump can also be reduced
Row number of units saves power consumption；It, can also be by closing this mode of the blender in winter when sludge bulking, it is heavy into two to reduce
The sludge concentration in pond controls the mud layer of secondary settling tank, controls sludge bulking, guarantees that secondary settling tank handles load.
Preferably, the reflux gate in first anoxic pond, is arranged in the first anoxic pond partition wall adjacent with anaerobic pond
Place；Reflux gate in second anoxic pond, is arranged in the end of the second anoxic pond.
The utility model has the beneficial effects that:
Degassing pond, residence time 0.5-1h, de- is arranged at aerobic gallery rear portion in the utility model biological treatment system
The dissolved oxygen in water is discharged in gas pond, dissolved oxygen concentration can be made averagely to reduce 0.75mg/L, and the pond that deaerates goes out oxygen in water
Concentration is maintained at 1.5mg/L or so, when regurgitant volume is larger, also anoxic pond can be made still to be always maintained at good anaerobic condition,
Higher denitrification rate is maintained, while the reaction in aerobic gallery will not be affected in the process, into secondary settling tank
After will not cause digestion or floating because of the too low generation anaerobic reaction of dissolved oxygen.
The vertical air foil profile blender in degassing pond can guarantee that anoxic gallery and dehydration pond sludge are uniformly mixed, and furthermore this is stirred
It is low with power consumption to mix device, mixing effect is good, motor advantage easy to repair on the water surface.The blender can also be run with gap,
The sludge concentration of return digestion liquid can be increased, improve nitric efficiency, promote effluent quality, while the fortune of reflux pump can also be reduced
Row number of units saves power consumption.
The utility model has the pulling flow type sewage biological treatment system of degassing function, both can guarantee good denitrification
Effect reduces water outlet total nitrogen, while will not adversely affect to other effluent index.
Detailed description of the invention
Fig. 1 is that there is the utility model the process flow in the pulling flow type sewage biological treatment system of degassing function to illustrate
Figure；
Fig. 2 is the pond body structural schematic diagram for the pulling flow type sewage biological treatment system that the utility model has degassing function；
Figure label: 1 is pre- anoxic pond, and 2 be anaerobic pond, and 3 be the first anoxic pond, and 4 be the second anoxic pond, and 5 be anoxic corridor
Road；6 be degassing pond, and 7 be laterally degassing gallery, and 8 be longitudinal degassing gallery, and 9 be reflux pump, and 10 water outlets, 11 is aerobic for first
Gallery, 12 be the second aerobic gallery, and 13 be the aerobic gallery of third, and 14 be the 4th aerobic gallery, and 15,16 be reflux gate, and 17 are
Underwater scooter, 18 be blender；Arrow in figure show water (flow) direction.
Specific embodiment
Illustrate specific embodiment of the present utility model with reference to the accompanying drawings and examples, but the following example only uses
It is described in detail the embodiments of the present invention, does not limit the scope of the utility model in any way.
Embodiment 1: a kind of pulling flow type sewage biological treatment system with degassing function, referring to Fig. 1, Fig. 2, including according to
Pre- anoxic pond 1, anaerobic pond 2, anoxic pond, anoxic gallery 5, aerobic gallery and the degassing pond 6 of secondary connection setting.
It is equipped with reflux pump 9 in the end in degassing pond 6, reflux pump 9 is submersible axial flow pump, model VUP0501 ME185/8-
42, metered flow 520L/s, rated head 1m.It is additionally provided with the water outlet 10 being connected with the secondary settling tank at rear portion, in anoxic
Blender 18 is equipped in gallery 5 and degassing pond 6；Anoxic pond includes the first anoxic pond 3 and the second anoxic pond 4, In being disposed adjacent
It is equipped with reflux gate 16 in first anoxic pond 3, reflux gate 15, reflux pump 9 and reflux gate are equipped in the second anoxic pond 4
15,16 are connected by pipeline respectively, the reflux gate 16 in the first anoxic pond 3, and setting is in the first anoxic pond 16 and anaerobic pond 2
At adjacent partition wall；The end of the second anoxic pond 4 is arranged in reflux gate 15 in second anoxic pond 4.In pre- anoxic pond 1, detest
Oxygen pond 2, the first anoxic pond 3 are respectively equipped with training wall group in second anoxic pond 4, and training wall group includes two arc training wall positions
Straight type training wall between two arc training walls, the inside cambered surface of two arc training walls are oppositely arranged.In pre- anoxic pond
1, anaerobic pond 2, be equipped with underwater scooter 17 in anoxic pond, model SB2224 A40/4, rated power 4kW, rated speed
56r/min。
Pre- anoxic pond 1, anaerobic pond 2, the first anoxic pond 3 and the second anoxic pond 4 are rectangle, in the same size, and width edge
One end is successively adjacent, and anoxic gallery 5 and aerobic gallery are parallel to pre- anoxic pond 1, anaerobic pond 2, the first anoxic pond 3 and the second anoxic
The length sides in pond 4 are arranged, and anoxic gallery 5 is adjacent with pre- anoxic pond 1, anaerobic pond 2, the length sides of anoxic pond.
Aerobic gallery includes successively being parallel to the setting of anoxic gallery 5 and being sequentially connected the aerobic gallery 11, second of logical first
The aerobic gallery 13 of aerobic gallery 12, third and the 4th aerobic gallery 14, the first aerobic gallery 11 are connected with anoxic gallery 5, the
Four aerobic 14 ends of corridor with degassing pond 6 be connected, be equipped with aerated conduit in the bottom of aerobic gallery, in aerobic gallery into
Row blast aeration provides sufficient gas for aerobic reaction.In degassing pond, when may also set up aerated conduit, but working not
It is aerated, so that the dissolved oxygen in water is released, concentration is discharged and flows back again after reducing；When accumulation has precipitating in degassing pond
When object, aerated conduit can be used and be aerated, to remove sediment therein.
Pre- anoxic pond 1, anaerobic pond 2, the first anoxic pond 3, the second anoxic pond 4, anoxic gallery 5, aerobic gallery, degassing pond 6
Collectively constitute the biological treatment pond body an of rectangle；The length of biological treatment pond body is equal to pre- anoxic pond 1, anaerobic pond 2, first lacks
The sum of oxygen pond 3, the length of the second anoxic pond 4, the width of biological treatment pond body is equal to the second anoxic pond 4, anoxic gallery 5 and four
The sum of the width of aerobic gallery.
The turning type pond body that the shape in pond 6 that deaerates is made of laterally deaerate gallery 7 and longitudinal degassing gallery 8, it is laterally de-
Air lane road 7 is adjacent with the 4th aerobic 14 end of gallery and is connected to, the ending vertical of longitudinal deaerate gallery 8 and lateral degassing gallery 7
It is arranged and is connected；The equal length of anoxic gallery 5 and the first, second, third aerobic gallery, the 4th aerobic gallery 14 and transverse direction
The sum of the length of degassing gallery 7 is equal to the length of biological treatment pond body, the width of the length and pre- anoxic pond 1 of longitudinal gallery 8 that deaerates
The sum of degree is equal to the width of biological treatment pond body.Blender 18 is equipped in laterally degassing gallery 7 and longitudinal degassing gallery 8.
The blender being arranged in anoxic gallery 5 and degassing pond 6 is vertical air foil profile blender, model FQM4000/9.0-2.2-
JL, rated power 2.2KW, rated speed 10r/min.
Related equipment component is conventional equipment element unless otherwise instructed in the embodiment above.
The utility model has the specific working mode of the pulling flow type sewage biological treatment system of degassing function are as follows: biology
The water inlet of processing system sequentially enters pre- anoxic pond, anaerobic pond, and it is anti-to enter back into the first anoxic pond, the second anoxic pond progress anoxic
It answers；The first aerobic gallery is flowed to by anoxic gallery again, then followed by the second to the 4th aerobic gallery, carries out aerobic reaction；Again
It flows to degassing pond by the 4th aerobic gallery to be de-gassed, the water outlet a part in the pond that deaerates flows back into the first anoxic by reflux pump
Pond, the second anoxic pond, another part enter secondary settling tank and carry out post precipitation processing.
Hydraulic detention time in degassing pond is maintained at 0.5-1h or so, so that the dissolved oxygen in the water flow in degassing pond obtains
To release, dissolved oxygen concentration averagely declines 0.75mg/L, and dissolved oxygen concentration in the water outlet in degassing pond is made to be maintained at the left side 1.5mg/L
The right side, into secondary settling tank after will not cause digestion or floating because of the too low generation anaerobic reaction of dissolved oxygen.Water flow exists simultaneously
Residence time in aerobic gallery is about reduced to 9-9.5h, will not be impacted to the reaction in aerobic gallery, by the pond that deaerates
Row is back to degassing pond again afterwards, so that dissolved oxygen remains at 0.4-0.5mg/L in anoxic pond, is in good anaerobic condition.
There is the utility model the pulling flow type sewage biological treatment system of degassing function both can guarantee good denitrification effect, reduce
It is discharged total nitrogen, while other effluent index will not be adversely affected.
The embodiments of the present invention is elaborated above in conjunction with drawings and examples, but the utility model
It is not limited to the above embodiment, within the knowledge of a person skilled in the art, this can also not departed from
It changes or changes under the premise of utility model objective.
Claims (10)
1. a kind of pulling flow type sewage biological treatment system with degassing function, which is characterized in that including being sequentially communicated setting
Pre- anoxic pond, anaerobic pond, anoxic pond, anoxic gallery, aerobic gallery and degassing pond,
It is equipped with reflux pump in the end in the degassing pond, the water outlet being connected with the secondary settling tank at rear portion is additionally provided with, is lacked described
Blender is equipped in oxygen gallery and degassing pond；The anoxic pond includes the first anoxic pond and the second anoxic pond being disposed adjacent,
In first anoxic pond and it is equipped with reflux gate in the second anoxic pond, the reflux pump leads to respectively with the reflux gate
Piping is connected；Aerated conduit is equipped in the bottom of the aerobic gallery.
2. the pulling flow type sewage biological treatment system with degassing function according to claim 1, which is characterized in that institute
Stating pre- anoxic pond, anaerobic pond, the first anoxic pond and the second anoxic pond is rectangle, and width edge one end is successively adjacent, described to lack
Oxygen gallery and aerobic gallery are parallel to the length sides setting of the pre- anoxic pond, anaerobic pond, the first anoxic pond and the second anoxic pond,
And the anoxic gallery is adjacent with the pre- anoxic pond, anaerobic pond, the length sides of anoxic pond.
3. the pulling flow type sewage biological treatment system with degassing function according to claim 2, which is characterized in that institute
Stating aerobic gallery includes successively being parallel to the anoxic gallery setting and being sequentially connected the aerobic gallery of logical first, the second aerobic corridor
The aerobic gallery of road, third and the 4th aerobic gallery, the first aerobic gallery are connected with the anoxic gallery, and the described 4th is good
Oxygen gallery end is connected with the degassing pond.
4. the pulling flow type sewage biological treatment system with degassing function according to claim 3, which is characterized in that institute
State pre- anoxic pond, anaerobic pond, the first anoxic pond, the second anoxic pond, anoxic gallery, aerobic gallery, degassing pond collectively constitute one
The biological treatment pond body of rectangle；The length of the biological treatment pond body be equal to the pre- anoxic pond, anaerobic pond, the first anoxic pond,
The sum of the length of second anoxic pond, the width of the biological treatment pond body is equal to second anoxic pond, anoxic gallery and four
The sum of the width of aerobic gallery.
5. the pulling flow type sewage biological treatment system with degassing function according to claim 4, which is characterized in that institute
State the turning type pond body that the shape in degassing pond is made of laterally deaerate gallery and longitudinal degassing gallery, the laterally degassing gallery
And connection adjacent with the described 4th aerobic gallery end, the ending vertical of longitudinal degassing gallery and the gallery that laterally deaerates
It is arranged and is connected；The equal length of the anoxic gallery and the first, second, third aerobic gallery, the 4th aerobic gallery
It is equal to the length of biological treatment pond body, the length of longitudinal degassing gallery and institute with the sum of the length of the laterally degassing gallery
State the width that the sum of width of pre- anoxic pond is equal to biological treatment pond body；In the laterally degassing gallery and longitudinal degassing gallery
It is equipped with blender.
6. the pulling flow type sewage biological treatment system with degassing function according to claim 5, which is characterized in that In
The pre- anoxic pond, the first anoxic pond, is respectively equipped with training wall group in the second anoxic pond at anaerobic pond, and the training wall group includes
Two arc training walls are located at the straight type training wall between two arc training walls, the inside cambered surface of described two arc training walls
It is oppositely arranged.
7. the pulling flow type sewage biological treatment system with degassing function according to claim 1, which is characterized in that institute
Stating reflux pump is submersible axial flow pump, model VUP0501 ME185/8-42, metered flow 520L/s, rated head 1m.
8. the pulling flow type sewage biological treatment system with degassing function according to claim 1, which is characterized in that In
The pre- anoxic pond, anaerobic pond are equipped with underwater scooter in anoxic pond, model SB2224 A40/4, rated power 4kW,
Rated speed 56r/min.
9. the pulling flow type sewage biological treatment system with degassing function according to claim 1, which is characterized in that In
The blender being arranged in the anoxic gallery and degassing pond is vertical air foil profile blender, model FQM4000/9.0-2.2-
JL, rated power 2.2KW, rated speed 10r/min.
10. the pulling flow type sewage biological treatment system with degassing function according to claim 1, which is characterized in that institute
The reflux gate in the first anoxic pond is stated, is arranged at the first anoxic pond partition wall adjacent with anaerobic pond；Second anoxic pond
Interior reflux gate, is arranged in the end of the second anoxic pond.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822156898.8U CN209583900U (en) | 2018-12-21 | 2018-12-21 | A kind of pulling flow type sewage biological treatment system with degassing function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822156898.8U CN209583900U (en) | 2018-12-21 | 2018-12-21 | A kind of pulling flow type sewage biological treatment system with degassing function |
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Cited By (1)
| 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 |
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2018
- 2018-12-21 CN CN201822156898.8U patent/CN209583900U/en not_active Expired - Fee Related
Cited By (1)
| 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 |
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