CN110127958A - The sewage-treatment plant and processing method of multiple spot reflux - Google Patents
The sewage-treatment plant and processing method of multiple spot reflux Download PDFInfo
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- CN110127958A CN110127958A CN201910533589.4A CN201910533589A CN110127958A CN 110127958 A CN110127958 A CN 110127958A CN 201910533589 A CN201910533589 A CN 201910533589A CN 110127958 A CN110127958 A CN 110127958A
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- pond
- aerobic tank
- anoxic pond
- anaerobic pond
- reflux
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- 238000010992 reflux Methods 0.000 title claims abstract description 41
- 239000010865 sewage Substances 0.000 title claims abstract description 29
- 238000003672 processing method Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000007788 liquid Substances 0.000 claims abstract description 38
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 33
- 239000011574 phosphorus Substances 0.000 claims abstract description 33
- 239000010802 sludge Substances 0.000 claims abstract description 29
- 230000003750 conditioning effect Effects 0.000 claims abstract description 28
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 27
- 238000004062 sedimentation Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000006731 degradation reaction Methods 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000037213 diet Effects 0.000 description 1
- 235000005911 diet Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Abstract
The invention discloses the sewage-treatment plants and processing method of a kind of reflux of multiple spot, including sequentially connected conditioning tank, anaerobic pond, anoxic pond, aerobic tank and sedimentation basin, the aerobic tank is connect with conditioning tank, anaerobic pond and anoxic pond respectively by nitrification liquid reflux pump and nitrification liquid return pipe, and the sedimentation basin is connect with anaerobic pond, anoxic pond and aerobic tank respectively by sludge reflux pump and mud return line.The return path of nitrification liquid is extended to conditioning tank, anaerobic pond and anoxic pond by the present invention, and the return path of sludge is extended to anaerobic pond, anoxic pond and aerobic tank；When sewage treatment plant occur water inlet concentration of nitrogen and phosphorus fluctuation it is larger, by a small margin be more than Design cooling load, winter low temperature the case where, when water outlet nitrogen and phosphorus indexes are not up to standard, open the return path of auxiliary, utilize the carbon source assisting nitrogen of conditioning tank and anaerobic pond, utilize anoxic pond and aerobic tank auxiliary dephosphorization, denitrogenation dephosphorizing efficiency is improved, enabling that treated, water outlet nitrogen and phosphorus indexes reach design discharge standard.
Description
Technical field
The invention belongs to environment protection fields, and in particular to a kind of sewage-treatment plant and processing method of multiple spot reflux.
Background technique
AO (anaerobic-aerobic) technique or AAO (anaerobic- anoxic- oxic) technique have simple structure, total hrt
Short, design and operation experience is mature, control complexity is small and is not likely to produce the series of advantages such as sludge bulking, is municipal sewage denitrogenation
One of top-priority technique when dephosphorization Design of Sewage Treatment, the technique are also most widely used in current municipal sewage plant, China
One of general synchronous denitrogen dephosphorus technology.Predictably, before not better biological denitrification phosphorous removal technique occurs, state
Interior will still can be to dominate to design, build the dirt of the city of various scales with AO, AAO technological principle within longer one period
Water treatment plant.
The principle of biological carbon and phosphorous removal and uncomplicated in AO, AAO technique.However, since the technique is single sludge system,
Biological carbon and phosphorous removal is related to nitrification, denitrification, releases phosphorus and inhales multiple and different biochemical reaction processes such as phosphorus, wherein each mistake
The principle of journey is different, and the requirement to the composition of microorganism, matrix type and environmental condition is also not quite similar, therefore will be at one
It is completed at the same time denitrogenation and dephosphorization process in system, inevitably encounters some contradictions and conflict, such as carbon source, sludge age, nitre
Hydrochlorate, nitrification and denitrification capacity release the problems such as phosphorus and suction phosphate capacity.These contradictions reflect into AO, AAO technique, will cause
The decline of denitrogenation dephosphorizing efficiency.
With the raising of Living consumption, the living habit of the people and diet structure have occurred great changes, in food
Ammonia-nitrogen content generally increase, the increasing of point source ammonia nitrogen discharge amount in addition causes to show showing for low ratio of carbon to ammonium in municipal drainage
As since carbon source is limited, the synchronous denitrification dephosphorizing efficiency of low carbon-nitrogen ratio sewage be will be greatly reduced.And under cryogenic conditions, micro- life
The activity of object can reduce, and also will affect denitrogenation dephosphorizing efficiency.
Therefore, it is necessary to solve intake concentration of nitrogen and phosphorus fluctuation it is larger, by a small margin be more than Design cooling load, winter low temperature the case where
Under, denitrogenation dephosphorizing low efficiency and treated water outlet nitrogen and phosphorus indexes problem not up to standard.
Summary of the invention
In view of this, the purpose of the present invention is to provide the sewage-treatment plant and processing method of a kind of reflux of multiple spot, energy
Enough solve sewage treatment plant occur water inlet concentration of nitrogen and phosphorus fluctuation it is larger, by a small margin be more than Design cooling load, winter low temperature the case where when,
Denitrogenation dephosphorizing low efficiency and treated water outlet nitrogen and phosphorus indexes problem not up to standard.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of sewage-treatment plant of multiple spot reflux, including sequentially connected conditioning tank, anaerobic pond, anoxic pond, aerobic tank
And sedimentation basin, the aerobic tank by nitrification liquid reflux pump and nitrification liquid return pipe respectively with conditioning tank, anaerobic pond and anoxic pond
Connection, the sedimentation basin are connect with anaerobic pond, anoxic pond and aerobic tank respectively by sludge reflux pump and mud return line.
The nitrification liquid reflux that the aerobic tank is connect with conditioning tank, anaerobic pond and anoxic pond as a preferred technical solution,
Nitrification liquid return valve is respectively equipped on pipe.
The nitrification liquid return pipe is respectively connected to conditioning tank middle section, anaerobic pond water entry as a preferred technical solution,
With anoxic pond water entry.
The mud return line that the sedimentation basin is connect with anaerobic pond, anoxic pond and aerobic tank as a preferred technical solution,
On be respectively equipped with sludge reflux valve.
The mud return line is respectively connected to anaerobic pond water entry, anoxic pond water entry as a preferred technical solution,
With aerobic tank water entry.
A kind of sewage water treatment method of multiple spot reflux, comprising the following steps:
(1) sewage enters anaerobic pond after conditioning tank, mixes with returned sludge, carries out at anaerobic phosphorus release in anaerobic pond
Reason；
(2) mud mixture in anaerobic pond enters anoxic pond, mixes with the nitrification liquid of aerobic tank reflux, carries out denitrification
Denitrogenation processing；
(3) mud mixture in anoxic pond enters aerobic tank, carries out organic matter degradation, aerobic phosphorus absorption and nitrification processing,
Nitrification liquid in aerobic tank is back to anoxic pond；
(4) mud mixture in aerobic tank enters sedimentation basin, carries out mud-water separation, and the partial sludge isolated is back to
Anaerobic pond；
When total nitrogen concentration of intaking is higher or water outlet total nitrogen is caused to be unable to stably reaching standard for winter low temperature, by the nitre in aerobic tank
Change liquid and is back to conditioning tank, anaerobic pond and anoxic pond respectively；When water inlet total phosphorus concentration is higher or winter low temperature causes to be discharged total phosphorus
When being unable to stably reaching standard, the sludge that sedimentation basin is isolated is back to anaerobic pond, anoxic pond and aerobic tank respectively.
As a preferred technical solution, when total nitrogen concentration is higher or winter low temperature causes to be discharged total nitrogen cannot stablize and reach for water inlet
When mark, the nitrification liquid in aerobic tank is back to conditioning tank middle section, anaerobic pond water entry and anoxic pond water entry respectively；Work as water inlet
When total phosphorus concentration is higher or winter low temperature causes water outlet total phosphorus to be unable to stably reaching standard, the sludge that sedimentation basin is isolated is flowed back respectively
To anaerobic pond water entry, anoxic pond water entry and aerobic tank water entry.
As a preferred technical solution, when total nitrogen concentration is higher or winter low temperature causes to be discharged total nitrogen cannot stablize and reach for water inlet
When mark, nitrification liquid be back to conditioning tank, anaerobic pond and anoxic pond reflux ratio be respectively 100%-150%, 100%-150% and
150%-200%；When total phosphorus concentration of intaking is higher or water outlet total phosphorus is caused to be unable to stably reaching standard for winter low temperature, sludge reflux is extremely
The reflux ratio of anaerobic pond, anoxic pond and aerobic tank is respectively 20%-50%, 10%-30% and 10%-30%.
The beneficial effects of the present invention are:
In traditional handicraft, nitrification liquid is only back to a return path of anoxic pond, and sludge is only back to anaerobic pond
A return path；And the return path of nitrification liquid is extended to conditioning tank, anaerobic pond and anoxic pond by the present invention, by sludge
Return path extends to anaerobic pond, anoxic pond and aerobic tank；When sewage treatment plant's appearance water inlet concentration of nitrogen and phosphorus fluctuation is larger, small size
The case where degree is more than Design cooling load, winter low temperature opens the return path of auxiliary, utilizes tune when water outlet nitrogen and phosphorus indexes are not up to standard
The carbon source assisting nitrogen in section pond and anaerobic pond improves denitrogenation dephosphorizing efficiency using anoxic pond and aerobic tank auxiliary dephosphorization, makes to locate
Water outlet nitrogen and phosphorus indexes after reason can reach design discharge standard.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is process flow diagram of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with
It better understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Fig. 1 is process flow diagram of the invention, as shown, a kind of sewage-treatment plant of multiple spot reflux, including
Sequentially connected conditioning tank 1, anaerobic pond 2, anoxic pond 3, aerobic tank 4 and sedimentation basin 5, the aerobic tank 4 are flowed back by nitrification liquid
Pump 6 and nitrification liquid return pipe are connect with conditioning tank 1, anaerobic pond 2 and anoxic pond 3 respectively, and the sedimentation basin 5 passes through sludge reflux pump
7 and mud return line connect respectively with anaerobic pond 2, anoxic pond 3 and aerobic tank 4.
Nitrification is respectively equipped on the nitrification liquid return pipe that the aerobic tank 4 is connect with conditioning tank 1, anaerobic pond 2 and anoxic pond 3
Liquid return valve 8,9,10；The nitrification liquid return valve 10 on nitrification liquid return pipe that aerobic tank 4 is connect with anoxic pond 3 is normally opened, aerobic
It is opened between the nitrification liquid return valve 8,9 on nitrification liquid return pipe that pond 4 and conditioning tank 1, anaerobic pond 2 connect.
The nitrification liquid return pipe is respectively connected to 3 water entry of 1 middle section of conditioning tank, 2 water entry of anaerobic pond and anoxic pond；It returns
The water entry of pond body is arranged in flow tube, and adjusting regurgitant volume is sufficiently mixed and observed conducive to phegma.
Sludge is respectively equipped on the mud return line that the sedimentation basin 5 is connect with anaerobic pond 2, anoxic pond 3 and aerobic tank 4 to return
Flow valve 11,12,13；Sludge reflux valve 11 on the mud return line that sedimentation basin 5 is connect with anaerobic pond 2 is normally opened, sedimentation basin 5 and lack
It is opened between the sludge reflux valve 12,13 on mud return line that oxygen pond 3, aerobic tank 4 connect.
The mud return line is respectively connected to 4 water entry of 2 water entry of anaerobic pond, 3 water entry of anoxic pond and aerobic tank.
Under normal conditions, the process flow of the sewage-treatment plant operation of multiple spot reflux is as follows:
(1) sewage enters anaerobic pond 2 after conditioning tank 1, mixes with returned sludge, and anaerobism is carried out in anaerobic pond 2 and is released
Phosphorus processing；
(2) mud mixture in anaerobic pond 2 enters anoxic pond 3, and the nitrification liquid to flow back with aerobic tank 4 mixes, and carries out anti-
Nitrify denitrogenation processing；
(3) mud mixture in anoxic pond 3 enters aerobic tank 4, carries out at organic matter degradation, aerobic phosphorus absorption and nitrification
It manages, the nitrification liquid in aerobic tank 4 is back to anoxic pond 3；
(4) mud mixture in aerobic tank 4 enters sedimentation basin 5, carries out mud-water separation, the partial sludge reflux isolated
To anaerobic pond 2.
When water inlet occurs in sewage treatment plant, total nitrogen concentration is higher or winter low temperature, leads to be discharged total nitrogen being unable to stably reaching standard
When, while nitrification liquid return valve 8,9,10 is opened, the nitrification liquid in aerobic tank 4 is back to 1 middle section of conditioning tank, anaerobic pond respectively
3 water entry of 2 water entries and anoxic pond, reflux ratio are respectively 100%-150%, 100%-150% and 150%-200%, according to
Actual motion and the adjustment of water quality monitoring situation, utilize the carbon source assisting nitrogen of conditioning tank 1 and anaerobic pond 2.
When water inlet occurs in sewage treatment plant, total phosphorus concentration is higher or winter low temperature, leads to be discharged total phosphorus being unable to stably reaching standard
When, while sludge reflux valve 11,12,13 is opened, the sludge that sedimentation basin 5 is isolated is back to 2 water entry of anaerobic pond respectively, is lacked
4 water entry of 3 water entry of oxygen pond and aerobic tank, reflux ratio is respectively 20%-50%, 10%-30% and 10%-30%, according to reality
Border operation and the adjustment of water quality monitoring situation, utilize 4 auxiliary dephosphorization of anoxic pond 3 and aerobic tank.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention
Protection scope within.Protection scope of the present invention is subject to claims.
Claims (8)
1. a kind of sewage-treatment plant of multiple spot reflux, including sequentially connected conditioning tank, anaerobic pond, anoxic pond, aerobic tank and
Sedimentation basin, it is characterised in that: the aerobic tank by nitrification liquid reflux pump and nitrification liquid return pipe respectively with conditioning tank, anaerobic pond
Connected with anoxic pond, the sedimentation basin by sludge reflux pump and mud return line respectively with anaerobic pond, anoxic pond and aerobic tank
Connection.
2. the sewage-treatment plant of multiple spot reflux according to claim 1, it is characterised in that: the aerobic tank and adjusting
Nitrification liquid return valve is respectively equipped on the nitrification liquid return pipe that pond, anaerobic pond and anoxic pond connect.
3. the sewage-treatment plant of multiple spot reflux according to claim 2, it is characterised in that: the nitrification liquid return pipe point
It is not connected to conditioning tank middle section, anaerobic pond water entry and anoxic pond water entry.
4. the sewage-treatment plant of multiple spot reflux according to claim 1, it is characterised in that: the sedimentation basin and anaerobism
Sludge reflux valve is respectively equipped on the mud return line that pond, anoxic pond and aerobic tank connect.
5. the sewage-treatment plant of multiple spot reflux according to claim 4, it is characterised in that: the mud return line difference
It is connected to anaerobic pond water entry, anoxic pond water entry and aerobic tank water entry.
6. a kind of sewage water treatment method of multiple spot reflux, comprising the following steps:
(1) sewage enters anaerobic pond after conditioning tank, mixes with returned sludge, and anaerobic phosphorus release processing is carried out in anaerobic pond；
(2) mud mixture in anaerobic pond enters anoxic pond, mixes with the nitrification liquid of aerobic tank reflux, carries out denitrification denitrogenation
Processing；
(3) mud mixture in anoxic pond enters aerobic tank, carries out organic matter degradation, aerobic phosphorus absorption and nitrification processing, aerobic
Nitrification liquid in pond is back to anoxic pond；
(4) mud mixture in aerobic tank enters sedimentation basin, carries out mud-water separation, and the partial sludge isolated is back to anaerobism
Pond；
It is characterized by: when total nitrogen concentration of intaking is higher or water outlet total nitrogen is caused to be unable to stably reaching standard for winter low temperature, it will be aerobic
Nitrification liquid in pond is back to conditioning tank, anaerobic pond and anoxic pond respectively；When water inlet total phosphorus concentration is higher or winter low temperature causes
When water outlet total phosphorus is unable to stably reaching standard, the sludge that sedimentation basin is isolated is back to anaerobic pond, anoxic pond and aerobic tank respectively.
7. the sewage water treatment method of multiple spot reflux according to claim 6, it is characterised in that: when water inlet total nitrogen concentration is higher
Or winter low temperature leads to be discharged total nitrogen when being unable to stably reaching standard, by the nitrification liquid in aerobic tank be back to respectively conditioning tank middle section,
Anaerobic pond water entry and anoxic pond water entry；When total phosphorus concentration is higher or winter low temperature causes to be discharged total phosphorus cannot stablize and reach for water inlet
When mark, the sludge that sedimentation basin is isolated is back to anaerobic pond water entry, anoxic pond water entry and aerobic tank water entry respectively.
8. the sewage water treatment method of multiple spot reflux according to claim 6, it is characterised in that: when water inlet total nitrogen concentration is higher
Or winter low temperature leads to be discharged total nitrogen when being unable to stably reaching standard, nitrification liquid is back to the reflux of conditioning tank, anaerobic pond and anoxic pond
Than being respectively 100%-150%, 100%-150% and 150%-200%；When water inlet total phosphorus concentration is higher or winter low temperature causes
When water outlet total phosphorus is unable to stably reaching standard, the reflux ratio of sludge reflux to anaerobic pond, anoxic pond and aerobic tank is respectively 20%-
50%, 10%-30% and 10%-30%.
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| CN201910533589.4A CN110127958A (en) | 2019-06-19 | 2019-06-19 | The sewage-treatment plant and processing method of multiple spot reflux |
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| CN201910533589.4A CN110127958A (en) | 2019-06-19 | 2019-06-19 | The sewage-treatment plant and processing method of multiple spot reflux |
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Family
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110451728A (en) * | 2019-08-20 | 2019-11-15 | 上海市市政规划设计研究院有限公司 | A kind of multiple spot sludge exteenal reflux enhancing biological carbon and phosphorous removal group technology |
| CN110563283A (en) * | 2019-10-12 | 2019-12-13 | 昆明金泽实业有限公司 | Air stripping formula backward flow integrates MBR sewage treatment device |
| CN113429070A (en) * | 2021-06-30 | 2021-09-24 | 广东北控环保装备有限公司 | Rural sewage treatment plant who possesses flexible design in adjustable region |
| CN115140909A (en) * | 2022-08-15 | 2022-10-04 | 广东北控环保装备有限公司 | Internal and external double-reflux sewage treatment equipment, system and method of coupling regulating tank |
| CN115367972A (en) * | 2022-09-22 | 2022-11-22 | 浙江开创环保科技股份有限公司 | Small-sized integrated MBR sewage treatment equipment and process suitable for inflow fluctuation |
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