CN109534509A - A kind of integrated multistage multistage AO-MBR film tank arrangement - Google Patents
A kind of integrated multistage multistage AO-MBR film tank arrangement Download PDFInfo
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- CN109534509A CN109534509A CN201811628908.1A CN201811628908A CN109534509A CN 109534509 A CN109534509 A CN 109534509A CN 201811628908 A CN201811628908 A CN 201811628908A CN 109534509 A CN109534509 A CN 109534509A
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- slot
- aerobic
- anoxic
- mbr
- multistage
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- 239000010865 sewage Substances 0.000 claims abstract description 33
- 238000005273 aeration Methods 0.000 claims abstract description 28
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 238000005276 aerator Methods 0.000 claims abstract description 12
- 238000010992 reflux Methods 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 210000000476 body water Anatomy 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 229910052799 carbon Inorganic materials 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 5
- 239000010802 sludge Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006396 nitration reaction Methods 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a kind of integrated multistage multistage AO-MBR film tank arrangement, including tank body, MBR reaction tank is equipped at tank body center, MBR reaction tank periphery is equipped at least one anoxic slot and at least one aerobic slot, and anoxic slot and aerobic slot are successively arranged alternately；Tank body is equipped with water inlet pipe and aeration tube；Water inlet pipe connects distribution main, and distribution main arranges along tank body inner periphery, and distribution main and the junction of each anoxic slot and aerobic slot are respectively equipped with inlet valve；Aeration tube connects aeration branch pipe, and aeration branch pipe is arranged along tank body inner periphery, and each anoxic slot and aerobic trench bottom are equipped with aerator, and aeration branch pipe passes through air inlet pipe with each aerator respectively and connect, and air inlet pipe is equipped with intake valve；MBR hyperfiltration membrane assembly is equipped in MBR reaction tank；Sewage is entered in the form of multiple spot water distribution in anoxic slot, is entered in MBR reaction tank after aerobic slot and anoxic slot are then passed sequentially through in the form of baffling, MBR reaction tank is connect by return pipe with aerobic slot.
Description
Technical field
The present invention relates to a kind of sewage-treatment plants, and in particular to a kind of integrated multistage multistage AO-MBR film tank arrangement,
Belong to sewage treatment field.
Background technique
Development with environmental improvement work from from amount to matter, wastewater treatment in China are developed on an unprecedented scale, and more high standard is being pursued
While quasi- effluent quality, the comprehensive benefit of consideration technology is also needed.
Currently, various water treatment technology routes and device, handling principle still with physical method, chemical method, physical-chemical process,
Based on bioanalysis.Technology is a hundred flowers contend in beauty, gigantic project, and investment is more, and processing Engineering Production Line is long, and occupied area is wide, automatically
Change degree is low.Therefore, although sewage disposal technology is various at present, standard can be become without a technology, form unified solution
Certainly scheme thinking causes China's water treatment technology many and diverse, it is difficult to realize that unified standard is carried out, also greatly hinder China in this way
The development of environment water process.
Integrated film bioreactor has been successfully applied as a kind of new and effective sewage-treatment plant in difference
In the sewage treatment of industry, it is integrated with both traditional biological processing technique and novel membrane separation technique feature, improves system
While processing capacity, the stabilization, reliable of effluent quality has also been ensured.However, traditional integrated film bioreactor is because of work
Skill is single, carbon source is insufficient and will appear total nitrogen discharged problem not up to standard.Therefore, a kind of integrated multistage multistage AO-MBR is developed
Film tank arrangement is particularly important.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of integrated multistage multistage AO-MBR film tank arrangement, the film tanks
Device is by the way of multiple spot water distribution, problem caused by this water distribution manner can effectively make up due to carbon source deficiency, thus
The removal rate of ammonia nitrogen in sewage and total nitrogen is further increased, stable effluent quality reaches level-one emission standard A；Solves existing work
Due to technique is single, carbon source is insufficient and causes effluent quality total nitrogen not up to standard problem in skill.
In order to solve the above technical problems, the technical solution adopted in the present invention is as follows:
A kind of integrated multistage multistage AO-MBR film tank arrangement, including tank body are equipped with MBR at the tank body center and react
Pond, MBR reaction tank periphery are equipped at least one anoxic slot and at least one aerobic slot, and the anoxic slot and aerobic slot are arranged in pairs
And anoxic slot and aerobic slot are successively arranged alternately；The tank body is equipped with water inlet pipe and aeration tube；Water inlet pipe connects distribution main,
Distribution main arranges along tank body inner periphery, and distribution main and the junction of each anoxic slot and aerobic slot are respectively equipped with inlet valve；
Aeration tube connects aeration branch pipe, and aeration branch pipe is arranged along tank body inner periphery, and each anoxic slot and aerobic trench bottom are equipped with aeration
Device, aeration branch pipe pass through air inlet pipe with each aerator respectively and connect, and air inlet pipe is equipped with intake valve；In MBR reaction tank
Equipped with MBR hyperfiltration membrane assembly, aeration branch pipe is connect by tracheae with the aerator of MBR hyperfiltration membrane assembly bottom；Sewage is with more
Point water distribution form enters in each anoxic slot, enters MBR reaction after aerobic slot and anoxic slot are then passed sequentially through in the form of baffling
Chi Zhong, MBR reaction tank are connect by return pipe with aerobic slot.
Wherein, the tank body is in cylindrical type, and tank body is made of plastics or carbon steel.
Wherein, MBR reaction tank periphery is set there are four anoxic slot and four aerobic slots, be divided into anoxic slot I, aerobic slot I,
Anoxic slot II, aerobic slot II, anoxic slot III, aerobic slot III, anoxic slot IV and aerobic slot IV；Anoxic slot I, aerobic slot I, anoxic
Slot II, aerobic slot II, anoxic slot III, aerobic slot III, anoxic slot IV and aerobic slot IV are sequentially communicated by through-hole structure；It is adjacent
The position of opening of groove body staggers successively.
Wherein, air-lift device is additionally provided in the MBR reaction tank, air-lift device is connected by stripping reflux pipe and aerobic slot IV
It connects.
Wherein, the tank body further includes tank body blow-down pipe, MBR membrane module blow-down pipe and outlet pipe, and MBR reaction tank passes through film
Component delivery hose is connect with the outlet pipe on tank body.
Wherein, aerator is aeration plate or aerator.
Sewage is entered in multiple anoxic slots of film tank module with multiple spot water distribution manner, sewage partial organic substances in anoxic slot
Degraded, while providing sufficient carbon source for subsequent denitrification denitrogenation, effectively compensate for the problem of carbon source deficiency causes (according to
It intakes from an anoxic slot, after level-one anoxic slot is using carbon source reaction sufficient in raw water, sewage enters in level-one aerobic slot, good
Oxygen slot can consume the carbon source in sewage, insufficient so as to cause carbon source in the sewage for entering second level anoxic slot, thus second level anoxic slot
It can not adequately be reacted, and multiple spot water distribution can make each anoxic slot that carbon source sufficient in raw water be made full use of to carry out instead
Answer), aerobic slot is subsequently entered, realizes nitrification, ammonia nitrogen is further removed, and anoxic slot is entered back into, and carries out denitrification；
Sewage successively passes through the multistage pond A-O, eventually enters into MBR reaction tank, strengthens nitration reaction, since the Physical entrapment of ultrafiltration membrane is made
With most of pollutant is removed, and integrated artistic makes total nitrogen removal efficiency high, and the sludge of MBR reaction tank is returned by air lift
Flow tube flows back into aerobic slot IV, further strengthens nitrification in aerobic slot IV, and organic matter is further removed, aerobic
The water of slot IV is again introduced into anoxic slot I and is further reacted, and circuits sequentially.
Compared with prior art, technical solution of the present invention has the beneficial effect that
Multistage multistage AO-MBR film tank arrangement of the invention is with occupied area is small, structure is simple, operation energy consumption is low, integrated
The advantages of degree height, convenient transportation and good sewage processing effect；The film tank arrangement can be according to practical water quality requirement, flexible modulation
The quantity of A/O reactive tank；The film tank arrangement is effectively compensated for by the way of multiple spot water distribution due to subsequent caused by single-point water inlet
The problem of carbon source deficiency, can effectively improve the removal rate of ammonia nitrogen in sewage and total nitrogen in anoxic slot, and stable effluent quality reaches
Level-one emission standard A；Solve in prior art causes effluent quality total nitrogen not up to standard since technique is single, carbon source is insufficient
Problem.
Detailed description of the invention
Fig. 1 is the top view of the multistage multistage AO-MBR film tank arrangement of the present invention；
Fig. 2 is Fig. 1 multistage of the invention face multistage AO-MBR film tank arrangement A-A cross-sectional view.
Specific embodiment
Technical solution of the present invention is further described with reference to the accompanying drawing.
The present embodiment is to handle certain city domestic sewage, treatment scale 1000m3/d, as shown in Fig. 1~2, using one kind
Integrated multistage multistage A/O-MBR film tank arrangement, the present embodiment use 4 grades of A/O-MBR treatment process, and 1 material of tank body is
LLDPE, tank body 1 are in cylindrical type, and 1 bottom diameter of tank body is 2800mm, and 34 internal diameter of MBR reaction tank is 1600mm, and 1 height of tank body is
6.0m.Integrated multistage multistage AO-MBR film tank arrangement of the present invention can according to practical water quality requirement, flexible modulation A/O reaction tank
Quantity can change the quantity of functional pool according to different disposal scaleable.
Integrated multistage multistage AO-MBR film tank arrangement of the present invention, including tank body 1 are equipped with MBR reaction tank at 1 center of tank body
The periphery of 34, MBR reaction tank 34 is equipped at least one anoxic slot and at least one aerobic slot, anoxic slot and aerobic slot be arranged in pairs and
Anoxic slot and aerobic slot are successively arranged alternately；Tank body 1 is equipped with water inlet pipe 3 and aeration tube 9；Water inlet pipe 3 connects distribution main 5,
Distribution main 5 arranges along 1 inner periphery of tank body, and distribution main 5 and the junction of each anoxic slot and aerobic slot are respectively equipped with into water
Valve 2；Aeration tube 9 connects aeration branch pipe 7, and aeration branch pipe 7 is arranged along 1 inner periphery of tank body, and each anoxic slot and aerobic trench bottom are equal
Equipped with aeration plate 6, aeration branch pipe 7 is connect by air inlet pipe 10 respectively with each aeration plate 6, and air inlet pipe 10 is equipped with intake valve
13, groove body anoxic or aerobic environment are controlled by control aeration quantity；MBR hyperfiltration membrane assembly 35 is equipped in MBR reaction tank 34,
Aeration branch pipe 7 is connect by connecting tracheae 17 with the aerator 18 of 35 bottom of MBR hyperfiltration membrane assembly；Sewage is with multiple spot water distribution shape
Formula enters in anoxic slot, enters in MBR reaction tank 34 after aerobic slot and anoxic slot are then passed sequentially through in the form of baffling, MBR is anti-
Pond 34 is answered to connect by return pipe 33 with aerobic slot.Inventive film tank arrangement is designed using multiple spot water distribution, each equal energy of anoxic slot
It makes full use of the substance in raw water to provide carbon source for denitrification denitrogenation process, removes mesh in combination with multi-stage aerobic, anoxic process
Pollutant is marked, apparatus of the present invention have good removal effect to ammonia nitrogen and total nitrogen.
34 periphery of MBR reaction tank is set there are four anoxic slot and four aerobic slots, is divided into anoxic slot I4, aerobic slot I11, anoxic
Slot II12, aerobic slot II15, anoxic slot III19, aerobic slot III21, anoxic slot IV25 and aerobic slot IV29；It is anoxic slot I4, good
Oxygen slot I11, anoxic slot II12, aerobic slot II15, anoxic slot II19, aerobic slot III21, anoxic slot IV25 and aerobic slot IV29 are logical
Through-hole structure is crossed to be sequentially communicated；The position of opening of adjacent groove body staggers successively setting.Air-lift device is additionally provided in MBR reaction tank 34
31, air-lift device 31 is connect by stripping reflux pipe 33 with aerobic slot IV29.
Tank body 1 further includes tank body blow-down pipe 46, MBR membrane module exhaust (emptying) pipe 28 and outlet pipe 24, MBR reaction tank 34
It is connect by membrane module delivery hose 45 with the outlet pipe 24 on tank body 1.
The MBR reaction tank 34 of integrated multistage multistage AO-MBR film tank arrangement of the present invention is located at 1 center of tank body, and sewage passes through
Water inlet pipe 3 enters 5 uniform water distribution of distribution main, is carried out by the water inlet control valve 2 in each anoxic slot of adjusting and aerobic slot more
Point water distribution, until water inlet is full of each functional pool, sewage is passed sequentially through after multi-stage anaerobic slot and aerobic slot in the form of baffling from lacking
Oxygen slot flows into MBR reaction tank 34, and the sludge in MBR reaction tank 34 is back in aerobic slot IV29 by stripping reflux pipe 33,
Sewage is finally discharged from MBR reaction tank 34 after purification.
The process of integrated multistage multistage AO-MBR film tank arrangement sewage treatment of the present invention is as follows:
Sewage enters water inlet pipe 3 by 5 uniform water distribution of distribution main, adjusts anoxic slot I4, anoxic slot II12 and anoxic slot
Water inlet control valve 2 in III19 carries out multiple spot water distribution, until sewage is full of each functional pool；Sewage is passed sequentially through in the form of baffling
Anoxic slot I4, aerobic slot I11, anoxic slot II12, aerobic slot II15, anoxic slot III19, aerobic slot III21, anoxic slot IV25 and
The sludge of MBR reaction tank 34, MBR reaction tank 34 flows back into aerobic slot IV29 by stripping reflux pipe 33, and MBR reaction tank 34 passes through
Stripping reflux pipe 33 is connected to aerobic slot IV29, and aerobic slot IV29 is used to store the aerobic phegma of MBR reaction tank 34, aerobic slot
Then the water of IV29 flows into anoxic slot I4, circuit sequentially；Sewage is finally drawn into 24 drain tank of outlet pipe from MBR reaction tank 34
Outside body 1.
The sewage of inventive film tank arrangement with multiple spot water distribution manner enter each anoxic slot in (sewage by multiple spot water distribution into
Entering in each anoxic slot of film tank arrangement, such water distribution manner makes each anoxic slot and can make full use of the carbon source in raw water,
The removal rate of total nitrogen in enhanced sewage), sewage partial organic substances in anoxic slot are degraded, while being subsequent denitrification denitrogenation
Sufficient carbon source is provided, aerobic slot is subsequently entered, realizes nitrification, ammonia nitrogen is further removed, and anoxic slot is entered back into, and is carried out
Denitrification.Sewage successively passes through the multistage pond A-O, eventually enters into MBR reaction tank 34, strengthens nitration reaction, due to ultrafiltration membrane
Physical entrapment effect, most of pollutant are removed, and integrated artistic makes total nitrogen removal efficiency high, reach level-one A standard；
The sludge of MBR reaction tank 34 is flowed back into aerobic slot IV 29 by stripping reflux pipe 33, further strong in aerobic slot IV 29
Change nitrification, organic matter is further removed, and the water of aerobic slot IV 29 is again introduced into anoxic slot 14 and carries out further instead
It answers, circuits sequentially.
Sanitary sewage is through integrated multistage multistage AO-MBR film tank arrangement of the present invention water quality data such as following table institute before and after the processing
Show:
| Project | COD(mg/L) | NH3-N(mg/L) | TN(mg/L) | SS(mg/L) |
| Water quality indicator before handling | 450 | 35 | 50 | 300 |
| Water quality indicator after processing | ≤50 | ≤8 | ≤14 | ≤9 |
As seen from the above table, the stable effluent quality of integrated multistage multistage AO-MBR film tank arrangement of the present invention is better than level-one A
Standard.
Claims (6)
1. a kind of integrated multistage multistage AO-MBR film tank arrangement, it is characterised in that: including tank body, be equipped at the tank body center
MBR reaction tank, MBR reaction tank periphery are equipped at least one anoxic slot and at least one aerobic slot, the anoxic slot and aerobic slot
It is arranged in pairs and anoxic slot and aerobic slot is successively arranged alternately；The tank body is equipped with water inlet pipe and aeration tube；Water inlet pipe connection
Distribution main, distribution main arrange along tank body inner periphery, and distribution main and the junction of each anoxic slot and aerobic slot are set respectively
There is inlet valve；Aeration tube connects aeration branch pipe, and aeration branch pipe is arranged along tank body inner periphery, and each anoxic slot and aerobic trench bottom are equal
Equipped with aerator, aeration branch pipe passes through air inlet pipe with each aerator respectively and connect, and air inlet pipe is equipped with intake valve；MBR
MBR hyperfiltration membrane assembly is equipped in reaction tank, aeration branch pipe is connect by tracheae with the aerator of MBR hyperfiltration membrane assembly bottom；
Sewage is entered in each anoxic slot in the form of multiple spot water distribution, is entered after aerobic slot and anoxic slot are then passed sequentially through in the form of baffling
In MBR reaction tank, MBR reaction tank is connect by return pipe with aerobic slot.
2. integrated multistage multistage AO-MBR film tank arrangement according to claim 1, it is characterised in that: the tank body is in circle
Column type, tank body are made of plastics or carbon steel.
3. integrated multistage multistage AO-MBR film tank arrangement according to claim 2, it is characterised in that: the MBR reaction
Pond periphery is set there are four anoxic slot and four aerobic slots, is divided into anoxic slot I, aerobic slot I, anoxic slot II, aerobic slot II, anoxic slot
III, aerobic slot III, anoxic slot IV and aerobic slot IV；Anoxic slot I, aerobic slot I, anoxic slot II, aerobic slot II, anoxic slot III,
Aerobic slot III, anoxic slot Iv and aerobic slot IV are sequentially communicated by through-hole structure；The position of opening of adjacent groove body staggers successively.
4. integrated multistage multistage AO-MBR film tank arrangement according to claim 3, it is characterised in that: the MBR reaction
Air-lift device is additionally provided in pond, air-lift device is connect by stripping reflux pipe with aerobic slot IV.
5. integrated multistage multistage AO-MBR film tank arrangement according to claim 1, it is characterised in that: the tank body also wraps
Tank body blow-down pipe, MBR membrane module blow-down pipe and outlet pipe are included, MBR reaction tank passes through going out on membrane module delivery hose and tank body
Water pipe connection.
6. integrated multistage multistage AO-MBR film tank arrangement according to claim 1, it is characterised in that: aerator is to expose
Gas disk or aerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811628908.1A CN109534509B (en) | 2018-12-28 | 2018-12-28 | Multistage AO-MBR membrane tank device of integration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811628908.1A CN109534509B (en) | 2018-12-28 | 2018-12-28 | Multistage AO-MBR membrane tank device of integration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109534509A true CN109534509A (en) | 2019-03-29 |
| CN109534509B CN109534509B (en) | 2023-12-26 |
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ID=65830974
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811628908.1A Active CN109534509B (en) | 2018-12-28 | 2018-12-28 | Multistage AO-MBR membrane tank device of integration |
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| Country | Link |
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| CN (1) | CN109534509B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162955A (en) * | 2021-10-22 | 2022-03-11 | 中国市政工程中南设计研究总院有限公司 | Multi-point water inlet micro-aerobic circulating type multi-stage AO-MBR process sewage treatment system and method |
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| CN209740811U (en) * | 2018-12-28 | 2019-12-06 | 南京瑞洁特膜分离科技有限公司 | Multistage AO-MBR membrane jar device of integration |
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2018
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|---|---|---|---|---|
| JP2003311295A (en) * | 2002-04-18 | 2003-11-05 | Japan Sewage Works Agency | Membrane separation activated sludge method |
| CN101851043A (en) * | 2010-02-04 | 2010-10-06 | 同济大学 | Integrated air-lift loop dynamic membrane bioreactor |
| CN104743666A (en) * | 2015-02-28 | 2015-07-01 | 北京大齐科技有限公司 | Novel low energy consumption integrated A2/O-MBR reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114162955A (en) * | 2021-10-22 | 2022-03-11 | 中国市政工程中南设计研究总院有限公司 | Multi-point water inlet micro-aerobic circulating type multi-stage AO-MBR process sewage treatment system and method |
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| Publication number | Publication date |
|---|---|
| CN109534509B (en) | 2023-12-26 |
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