CN102786138A - Sectionalized sewage treatment tank using cyclic activated sludge system - Google Patents
Sectionalized sewage treatment tank using cyclic activated sludge system Download PDFInfo
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- CN102786138A CN102786138A CN2012102578197A CN201210257819A CN102786138A CN 102786138 A CN102786138 A CN 102786138A CN 2012102578197 A CN2012102578197 A CN 2012102578197A CN 201210257819 A CN201210257819 A CN 201210257819A CN 102786138 A CN102786138 A CN 102786138A
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- sludge
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- 239000010802 sludge Substances 0.000 title claims abstract description 48
- 239000010865 sewage Substances 0.000 title abstract description 15
- 125000004122 cyclic group Chemical group 0.000 title abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 26
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000010992 reflux Methods 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 25
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 25
- 239000011574 phosphorus Substances 0.000 abstract description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- 241000894006 Bacteria Species 0.000 abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 241000108664 Nitrobacteria Species 0.000 abstract 1
- 238000005273 aeration Methods 0.000 abstract 1
- 230000001351 cycling effect Effects 0.000 abstract 1
- 239000005416 organic matter Substances 0.000 abstract 1
- 150000002823 nitrates Chemical class 0.000 description 10
- 239000011259 mixed solution Substances 0.000 description 9
- 229920000388 Polyphosphate Polymers 0.000 description 6
- 229920000037 Polyproline Polymers 0.000 description 6
- 239000001205 polyphosphate Substances 0.000 description 6
- 235000011176 polyphosphates Nutrition 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002906 microbiologic effect Effects 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 241000233866 Fungi Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009294 enhanced biological phosphorus removal Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QJGQUHMNIGDVPM-OUBTZVSYSA-N nitrogen-15 Chemical compound [15N] QJGQUHMNIGDVPM-OUBTZVSYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a sectionalized sewage treatment tank using a cyclic activated sludge system. The sewage treatment tank comprises a tank body; the tank body is provided with a water inlet, a water outlet and a surplus sludge discharge outlet and is partitioned by division plates into a pre-anaerobic zone, an anaerobic zone, an anoxic zone and an aerobic zone which are of different volumes, wherein the volume of the aerobic zone is greater than the volume of the anoxic zone, and the volume of the anoxic zone is greater than the volume of the anaerobic zone; stirrers are respectively arranged in the pre-anaerobic zone, the anaerobic zone and the anoxic zone; an aeration device, an aerobic sludge circulating pump and a water decanter are installed in the aerobic zone; sludge flows back in two stages, wherein the sludge is recycled from the aerobic zone to the anoxic zone in the first stage and then flows back from the anoxic zone to the pre-anaerobic zone in the second stage. According to the invention, sectionalized and staged cycling of the sludge enables anaerobic and anoxic states to be optimal, phosphorus accumulating organisms, anti-denitrifying bacteria and nitrobacteria in the sludge can realize phosphorus removal and nitrogen removal under optimal conditions, and therefore, a good nitrogen, phosphorus and organic matter removal effect is achieved.
Description
Technical field
The present invention relates to a kind of sewage Wastewater Treated by Activated Sludge Process pond, particularly a kind of subregion circulating active sludge method treatment tank, this treatment tank more is applicable to the biological denitrificaion and the dephosphorization of sewage or municipal effluent.
Background technology
Circulating active sludge method (Cyclic Activated Sludge System claims CASS again) is one of main method of sewage and municipal sewage treatment.This technology is invented in 1989 by the Goronszy of U.S. Trans Enviro company; Be to sequencing batch active sludge (Sequencing Batch Reactor; Claim SBR again) significant improvement, promptly kept the characteristic that the SBR technology investment is little, working cost is low, flexible and changeable, simultaneously owing to increased the selection pond; Suppressing the ubiquitous thread fungus of active sludge expands; Therefore, can obtain the better active sludge of sedimentation function, be one of main technique of present sewage and municipal effluent Wastewater Treated by Activated Sludge Process.
But this technology is in operation and also has some problems, mainly is owing to only be provided with the selection pond, does not have tangible subregion, and denitrification mainly forms the oxygen-starved area through control flco yardstick in flco inside under good oxygen condition, carry out denitrification through synchronous nitration-denitrification.In this case, though formed in the CASS pond good in big flocculating body, but since the required carbon source (organism) of denitrification need through diffusing through the aerobic layer of flco; It is inner to arrive flco, and organism is by the aerobic microbiological mass consumption, therefore in this process; In fact the main inner source of denitrification is breathed and is accomplished; And be used for denitrifying organism mainly by the aerobic microbiological oxidation, and not only consumed a large amount of dissolved oxygens, cause energy wastage; And nitric efficiency is lower, and this point is particularly outstanding for the lower sewage of C/N.
In addition; Because the nitric efficiency of circulating active sludge method is low, contains a large amount of nitrate salt in water outlet and the mud, when mud is back to the anaerobic selection pond; Also bring nitrate salt into the selection pond; Cause the anaerobic selection pond in fact not get into anaerobic state (for anoxic condition), reduced the release of polyP bacteria, influence the phosphor-removing effect of total system then phosphorus.
Summary of the invention
In order to overcome the problem that denitrogenation of circulating active sludge method and dephosphorization efficiency by using are lower, energy consumption is high; The objective of the invention is to, a kind of subregion circulating active sludge method treatment tank is provided, in the pond through different zones is set; Create polyP bacteria, denitrifying bacteria and nitrifier adapt circumstance and condition the most respectively; Active sludge circulates according to subregion in the pond simultaneously, accomplishes release, the denitrification and nitrated of phosphorus respectively, thereby reaches the purpose of efficient denitrification and dephosphorization.
In order to realize above-mentioned task, the technical solution that the present invention adopts is following:
A kind of subregion circulating active sludge method treatment tank; Comprise the pond body, water-in, water outlet and excess sludge discharge mouth are arranged on the body of pond, it is characterized in that; Described pond body is divided into volume different preparatory anaerobic zone, anaerobic zone and oxygen-starved area and aerobic zone by dividing plate; Wherein, the volume of aerobic zone is greater than the oxygen-starved area, and the volume of oxygen-starved area is greater than anaerobic zone; Being respectively equipped with whisking appliance in anaerobic zone, anaerobic zone and the oxygen-starved area in advance, in aerobic zone, be provided with aerating apparatus, aerobic sludge recycle pump and strain hydrophone;
Mud divides two-stage to reflux, and the first step is that mud is circulated to the oxygen-starved area through aerobic zone, and the second stage is back to preparatory anaerobic zone through the oxygen-starved area.
Subregion circulating active sludge method treatment tank of the present invention; In anaerobic zone, anaerobic zone and the oxygen-starved area whisking appliance is being set respectively in advance; Be used to make the mixed solution in the district to be in suspended state; The mikrobe of being convenient in the mixed solution fully contacts with pollutent, and the sedimentary mud of aerobic zone returns aerobic zone again through the oxygen-starved area, forms nitrated-denitrification denitrogenation; The mud of oxygen-starved area gets into anaerobic zone again and mixes with former water after anaerobic zone removes remaining nitrate salt in advance, thereby creates best anaerobic environment; At this; PolyP bacteria in the mud is released phosphorus through the phosphorus that gathers that hydrolysis self forms, and the organism in the former water of the energy absorption of acquisition synthesizes PHA, gets into follow-up oxygen-starved area and aerobic zone; PolyP bacteria utilizes nitrate salt and oxygen oxidation to gather phosphorus fully at anaerobic zone synthetic PHA, thereby obtains higher enhanced biological phosphorus removal efficient.
Compare with existing circulating active sludge method; Because treatment tank of the present invention has adopted sectional form; Through the segmentation circulating active sludge; Thereby can in reaction tank, make up strict anaerobism, anoxic and aerobic zone, form best anaerobic phosphorus release, denitrification phosphorus-collecting and the aerobic environment that gathers phosphorus, aerobic nitrification, the polyP bacteria in the mud, denitrifying bacteria and nitrifier can carry out corresponding biological respinse with optimal state in each district.Simultaneously; In order to improve the effect of dephosphorization, its subregion round-robin mode, having overcome original circulating active sludge method mud reflux type is that the aerobic zone mixed solution once directly is back to the anaerobic selection pond; Nitrate salt in the aerobic zone is brought back to anaerobic pond, influence the defective of anaerobic phosphorus release.
The backflow of mud is carried out in two steps, and the mixed solution that has nitrate salt that is refluxed by aerobic zone at first is back to anoxic pond and carries out denitrification, makes that the nitrate concentration in the mixed solution significantly reduces; And then be back to preparatory anaerobic zone; At this, denitrifying bacteria utilizes the endogenous carbon of self that the nitrate salt in the mixed solution is removed fully, gets into anaerobic pond then; Guaranteed the best anaerobic state of anaerobic pond; For the anaerobic phosphorus release of polyP bacteria has been created the righttest condition, therefore, phosphor-removing effect also is expected to improved further simultaneously.It is core of the present invention that the substep of the subregion of biological reaction tank and mud (or mixed solution) refluxes.Subregion has been created best biological respinse environment not increasing under original reaction zone volumetrical condition, and therefore, biological respinse (denitrogenation, dephosphorization and removal COD) efficient can increase substantially; And the substep backflow only is that an original step is refluxed, and is decomposed into for two steps, and the quantity of reflux of the first step is with original identical; And the quantity of reflux in second step also can reduce, and total lift height does not become, therefore; The energy consumption of mixed-liquor return (or power) does not only increase, and also reduces to some extent on the contrary.
Description of drawings
Fig. 1 is the structural map of the circulating active sludge method treatment tank of prior art employing, and wherein (a) is plat, (b) is sectional drawing.
Fig. 2 is the structural map of subregion circulating active sludge method treatment tank of the present invention, and wherein (a) is plat, (b) with (c) be sectional drawing.
Fig. 3 is the another kind of structural map (oxygen-starved area 5 adopt combination types) of subregion circulating active sludge method treatment tank of the present invention, and wherein (a) is plat, (b) be sectional drawing (c).
Label among the figure is represented respectively: 1, pond body, 2, dividing plate, 3, anaerobic zone in advance, 4, anaerobic zone; 5, oxygen-starved area, 6, aerobic zone, 7, whisking appliance, 8, aerating apparatus; 9, aerobic sludge recycle pump, 10, the anoxic sludge circulation pump, 11, strain hydrophone; 12, water-in, 13, water outlet, 14, sludge pump.Solid arrow among the figure is represented water (flow) direction, and dotted arrow is represented mud backflow direction.
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Embodiment
Referring to accompanying drawing 2; Subregion circulating active sludge method treatment tank of the present invention comprises pond body 1, and water-in 12 and water outlet 13 and mud discharging mouth 14 are arranged on the pond body 1; Pond body 1 is divided into the different preparatory anaerobic zone 3 of cross-sectional area, anaerobic zone 4, oxygen-starved area 5 and aerobic zone 6 by dividing plate 2; Wherein, the area of aerobic zone 6 is greater than oxygen-starved area 5, and the area of oxygen-starved area 5 is greater than anaerobic zone 4.In anaerobic zone 3, anaerobic zone 4 and the oxygen-starved area 3 whisking appliance 7 being housed in advance, be provided with anoxic sludge circulation pump 11 in the oxygen-starved area 3; Aerating apparatus 8, aerobic sludge recycle pump 9 are arranged in the aerobic zone 6 and strain hydrophone 11.
The principle of work of subregion circulating active sludge method treatment tank of the present invention is: sewage at first gets into the anaerobic zone 4 in the pond body 1 by water-in 12; Mix with the mud that refluxes from preparatory anaerobic zone 3; Organism in the polyP bacteria rapid absorption water inlet in the mud is released phosphorus simultaneously; Get into oxygen-starved area 5 then; At this, the mud that refluxes with aerobic zone 6 carries out hypoxia response, on the one hand; PolyP bacteria utilizes the nitrate salt in the mixed solution to carry out denitrification phosphorus-collecting; On the other hand, the denitrifying bacteria in the returned sluge utilizes that remaining organism carries out denitrification in the former water, realizes denitrification phosphorus-collecting and denitrification simultaneously; Be back to preparatory anaerobic zone 3 through the mixed solution small portion after the anoxic and further carry out denitrification, remove the nitrate salt in the mud fully, for anaerobic phosphorus release is created good condition; The most of aerobic zone 6 that gets into of residue, the airborne oxygen that the polyP bacteria in this mud utilizes aerating apparatus 8 to provide, the organism that oxidation absorbs at anaerobic zone 4; Carry out aerobic suction phosphorus, simultaneously, the airborne oxygen that nitrifier also utilizes aerating apparatus 8 to provide carries out nitrated; For denitrification phosphorus-collecting and denitrification denitrogenation provide condition, treat that nitrogen, phosphorus and organism in the water all is reduced to the concentration of requirement after, aerating apparatus 8 stops air feed; Precipitate; Water outlet is discharged through water outlet 13 by straining hydrophone 11, and excess sludge is discharged by sludge pump 14, keeps the balance of entire reaction.So move in circles.Pollutents such as the organism in the sewage, nitrogen and phosphorus are able to remove, and reach the purpose of removing organism, nitrogen and phosphorus simultaneously.
In technique scheme, according to the width of pond body 1, discrete (Fig. 2) can be adopted in oxygen-starved area 5; Be that the oxygen-starved area is made up of two reaction tanks; Or combination type, promptly the oxygen-starved area constitutes (Fig. 3) by a reaction tank, and the former is suitable for the occasion of pond body broad; The latter is suitable for the narrower occasion of pond body, to satisfy different design requirementss.
Below be the embodiment that the contriver provides, need to prove that following embodiment is some more excellent examples, main purpose is to understand better the present invention, the invention is not restricted to these embodiment.
Embodiment 1:
Certain university's park design adopts subregion circulating active sludge method of the present invention to handle campus district sewage, and reaction tank is long to be 24m, and wide is 8m, and depth of water 5.5m, cubic capacity are 1056m
3Wherein the volume of anaerobic zone 3 and anaerobic zone 4 is respectively 88m3 in advance, and the volume of oxygen-starved area 5 is 176m3, and aerobic zone 6 volumes are 704m3; The volumetric ratio of anaerobic zone and oxygen-starved area sum and aerobic zone is 1:2; Separated structure shown in Figure 2 is adopted in oxygen-starved area 5, promptly constitutes the oxygen-starved area by two reaction tanks, 1 in the whisking appliance that respectively to dispose 1 power in four reaction tanks of anaerobic zone and oxygen-starved area be 0.5KW.The COD of sewage concentration that gets into treatment system is 300～500mg/L, total nitrogen 40～60mg/L, total phosphorus 3～6mg/L.The COD concentration of handling the back water outlet is 30～50mg/L, total nitrogen 10～15mg/L, and total phosphorus 0.2～0.5mg/L can satisfy the one-level A standard among the national urban wastewater treatment firm pollutant emission standard GB18918-2002.
Embodiment 2:
Circulating active sludge method (CASS) Treating Municipal Sewage shown in Figure 1 is adopted in certain sewage work's design, and the volumetric ratio of design anaerobic zone 4 and aerobic zone 6 is 1:8.The municipal effluent COD concentration that gets into treatment system is 300～500mg/L, total nitrogen 40～60mg/L, total phosphorus 3～6mg/L.Owing to contain a large amount of nitrate salt in the mud that refluxes; Therefore, the nitrate concentration in the anaerobic zone maintains about 3mg/L, does not almost release phosphorus; The COD concentration of handling the back water outlet is 30～50mg/L; Total nitrogen 15～20mg/L, total phosphorus 1～2mg/L only can satisfy the secondary standard among the national urban wastewater treatment firm pollutant emission standard GB18918-2002.
Adopt the structure (Fig. 3) of subregion circulating active sludge method treatment tank of the present invention to transform; The volumetric ratio of improved anaerobic zone 4 and oxygen-starved area 5 sums and aerobic zone 6 is 1:2; Combination type is adopted in oxygen-starved area 5; Be a reaction tank, mud refluxes and transform secondary backflow of the present invention as by original once backflow.Nitrate concentration in the anaerobic zone 4 reduces significantly, is generally less than 1mg/L, has obtained anaerobic phosphorus release preferably, and nitric efficiency also increases substantially.Transform the back under same flooding velocity and water quality; The COD concentration of water outlet is 30mg/L～50mg/L; Total nitrogen 10mg/L～15mg/L, total phosphorus can satisfy the one-level A standard among the national urban wastewater treatment firm pollutant emission standard GB18918-2002 less than 0.5mg/L.
Claims (2)
1. subregion circulating active sludge method treatment tank; Comprise pond body (1), water-in (12), water outlet (13) and excess sludge discharge mouth (14) are arranged on the pond body (1), it is characterized in that; Described pond body (1) is divided into the different preparatory anaerobic zone (3) of volume, anaerobic zone (4) and oxygen-starved area (5) and aerobic zone (6) by dividing plate (2); Wherein, the volume of aerobic zone (6) is greater than oxygen-starved area (5), and the volume of oxygen-starved area (5) is greater than anaerobic zone (4);
In preparatory anaerobic zone (3), anaerobic zone (4) and oxygen-starved area (5), whisking appliance (7) is arranged respectively; Be provided with anoxic sludge circulation pump (10) in the oxygen-starved area (5), aerating apparatus (8), aerobic sludge recycle pump (9) arranged in aerobic zone (6) and strain hydrophone (11);
Mud divides two-stage to reflux, and the first step is that mud is circulated to oxygen-starved area (5) through aerobic zone (6), and (5) are back to preparatory anaerobic zone (3) through the oxygen-starved area in the second stage.
2. subregion circulating active sludge method treatment tank as claimed in claim 1 is characterized in that described oxygen-starved area (5) are discretes, promptly are made up of a plurality of reaction tanks; Or combination type, promptly form by a reaction tank, form different partition areas.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787498A (en) * | 2013-11-03 | 2014-05-14 | 北京工业大学 | Rapid starting method of low-temperature low C/N sewage improvement A2/O process |
| CN104310587A (en) * | 2014-10-29 | 2015-01-28 | 广州华浩能源环保集团有限公司 | Denitrification and dephosphorization wastewater treatment system and process |
| CN105668940A (en) * | 2016-03-31 | 2016-06-15 | 武汉绿明利环能股份有限公司 | Ecological ICPS municipal domestic sewage treatment method |
| CN106830322A (en) * | 2017-03-02 | 2017-06-13 | 南京市市政设计研究院有限责任公司 | It is a kind of suitable for low CN than modified form AAO ponds that sewage/wastewater is administered |
| CN107601669A (en) * | 2017-11-01 | 2018-01-19 | 济宁市孚源环保科技有限公司 | A kind of method based on MBBR technique upgrade expanding biochemistry pools |
| CN107651753A (en) * | 2017-11-08 | 2018-02-02 | 中机国际工程设计研究院有限责任公司 | Sewage water denitrification dephosphorization apparatus |
| CN107698025A (en) * | 2017-11-08 | 2018-02-16 | 中机国际工程设计研究院有限责任公司 | Integrated sewage water denitrification dephosphorization apparatus |
| CN112047470A (en) * | 2020-08-25 | 2020-12-08 | 深圳市清研环境科技有限公司 | CASS pool in-situ upgrading and reconstruction method |
| CN116477776A (en) * | 2023-01-16 | 2023-07-25 | 山东美泉环保科技有限公司 | Front-phosphorus-removal rear-endogenous denitrification coupling MBR sewage treatment system and technology |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787498A (en) * | 2013-11-03 | 2014-05-14 | 北京工业大学 | Rapid starting method of low-temperature low C/N sewage improvement A2/O process |
| CN103787498B (en) * | 2013-11-03 | 2015-03-04 | 北京工业大学 | Rapid starting method of low-temperature low C/N sewage improvement A2/O process |
| CN104310587A (en) * | 2014-10-29 | 2015-01-28 | 广州华浩能源环保集团有限公司 | Denitrification and dephosphorization wastewater treatment system and process |
| CN105668940A (en) * | 2016-03-31 | 2016-06-15 | 武汉绿明利环能股份有限公司 | Ecological ICPS municipal domestic sewage treatment method |
| CN106830322A (en) * | 2017-03-02 | 2017-06-13 | 南京市市政设计研究院有限责任公司 | It is a kind of suitable for low CN than modified form AAO ponds that sewage/wastewater is administered |
| CN107601669A (en) * | 2017-11-01 | 2018-01-19 | 济宁市孚源环保科技有限公司 | A kind of method based on MBBR technique upgrade expanding biochemistry pools |
| CN107651753A (en) * | 2017-11-08 | 2018-02-02 | 中机国际工程设计研究院有限责任公司 | Sewage water denitrification dephosphorization apparatus |
| CN107698025A (en) * | 2017-11-08 | 2018-02-16 | 中机国际工程设计研究院有限责任公司 | Integrated sewage water denitrification dephosphorization apparatus |
| CN107698025B (en) * | 2017-11-08 | 2023-06-02 | 中机国际工程设计研究院有限责任公司 | Integrated sewage denitrification and dephosphorization device |
| CN107651753B (en) * | 2017-11-08 | 2023-06-02 | 中机国际工程设计研究院有限责任公司 | Sewage denitrification and dephosphorization device |
| CN112047470A (en) * | 2020-08-25 | 2020-12-08 | 深圳市清研环境科技有限公司 | CASS pool in-situ upgrading and reconstruction method |
| CN116477776A (en) * | 2023-01-16 | 2023-07-25 | 山东美泉环保科技有限公司 | Front-phosphorus-removal rear-endogenous denitrification coupling MBR sewage treatment system and technology |
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| CN102786138B (en) | 2014-11-26 |
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