CN105858886A - Multistage anoxic and oxic coupling MBR sewage treatment technology for enhanced nitrogen and phosphorus removal - Google Patents
Multistage anoxic and oxic coupling MBR sewage treatment technology for enhanced nitrogen and phosphorus removal Download PDFInfo
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- CN105858886A CN105858886A CN201610223161.6A CN201610223161A CN105858886A CN 105858886 A CN105858886 A CN 105858886A CN 201610223161 A CN201610223161 A CN 201610223161A CN 105858886 A CN105858886 A CN 105858886A
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- 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
- C02F3/308—Biological phosphorus removal
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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Abstract
The invention discloses a multistage AO (anoxic and oxic) coupling MBR energy saving and consumption reduction technology for enhanced nitrogen and phosphorus removal. The technology is suitable for municipal wastewater treatment, and comprises a multistage AO biological reaction tank and an MBR system with a sludge buffer area. Return sludge of the sludge buffer area enters an anaerobic pool, a secondary anoxic pool, a (n-1)th anoxic pool and an nth anoxic pool in proportion, the mixed liquid of a membrane pool enters all stage oxic pools in proportion, sewage undergoes phosphorus uptake and a digestion reaction in the oxic pools and the membrane pool, and sewage undergoes a denitrification reaction in the anoxic pools and the sludge buffer area, so the enhanced nitrogen and phosphorus removal purpose is realized. Compared with present A2O + MBR technologies, the technology disclosed in the invention has the advantages of strong impact load resistance, small total aeration quantity, small return sludge amount, internal reflux cancelling, great reduction of the running consumption, high nitrogen and phosphorus removal efficiency, and large development prospect in the field of municipal sewage treatment.
Description
Technical field
The present invention relates to a kind of municipal wastewater and process technique, particularly relate to the coupling MBR strengthening of a kind of multistage AO (Anoxic/Aerobic)
Denitrogenation dephosphorizing and energy-saving and cost-reducing sewage treatment process.
Background technology
Along with the appearance of country's " ten, water " policy, improve China's situation of water resource comprehensively, improve water utilization rate,
Extremely urgent；The discharge standard performing the strictest municipal wastewater and industrial wastewater will be effective solution.
Major part Sewage Plant uses " anaerobic-anoxic-oxic-second pond " PROCESS FOR TREATMENT sewage at present, and this technique floor space is big,
Impact resistance is limited in one's ability, and difficulty meets COD simultaneouslyCr< 30mg/L, TN < 10mg/L, TP < 0.3mg/L, NH3-N<1.5mg/L
Process requirement, generally require increase strengthened denitrification, chemical dephosphorization equipment, increase investment and operating cost.Season at the beginning of Chun Modong
Time alternately, easily there is mud filamentary discharges, finally affect second pond and produce water water quality.
Membrane Bio-reactor Technology (MBR) is little because of its floor space, produces water quality stabilizing, anti impulsion load, automaticity
The features such as high, operational management is convenient are used widely at sewage treatment area.But it is big that MBR exists aeration rate always, return
The problems such as flow is big, and operation energy consumption is high.With other process process combination use in there is also problems, such as with tradition
When AAO process combination uses, MBR pond mud needs to be back to Aerobic Pond or anoxic pond, and due to long-term aeration, membrane cisterna dissolves
Oxygen is higher, and mud is broken, and being back to anoxic pond can affect denitrification effect, is back to Aerobic Pond bigger on sludge character impact.
The most preferably being combined with traditional handicraft, exploitation energy conservation is the development trend of MBR technology.
Summary of the invention
It is an object of the invention to overcome the deficiency of above-mentioned technology, it is provided that a kind of multi-stage anaerobic being particularly suited for urban wastewater treatment
The aerobic sewage treatment process coupled with MBR, arranges mud relief area in MBR system, on the basis of intensified denitrification and dephosphorization,
Reduce the operation energy consumption of MBR.
The technical solution used in the present invention is: the multistage AO of a kind of intensified denitrification and dephosphorization coupling MBR saves energy and reduce the cost technique, bag
Include multistage AO bio-reaction zone and MBR system；The water inlet of the anaerobic pond of described multistage AO bio-reaction zone is at the bottom of pond
Portion, diagonal angle upper opening overflow enters one-level anoxic pond, and one-level anoxic pond diagonal angle bottom opening flows into one-level Aerobic Pond, and one-level is good
Diagonal angle, oxygen pond upper opening enters two grades of anoxic pond, is sequentially connected in series to n level anoxic pond and n Aerobic Pond；Described MBR system
System includes mud relief area and membrane cisterna；Described mud relief area is connected with membrane cisterna by overfall, and mud arranges inclined tube in relief area
Settling zone, bottom, sloping plate deposition district arranges mud perforated pipe,
The sewage disposal of intensified denitrification and dephosphorization is carried out as steps described below:
The water inlet of A, anaerobic pond, two grades of anoxic pond, (n-1) level anoxic pond and n level anoxic pond is propped up by respective water inlet respectively
Road connects inlet pipeline, and flow of inlet water is by each water inlet way solenoid valve and water inlet branch road electromagnetic flowmeter regulation, progression
N >=2 grade；
The water side of B, n level Aerobic Pond connects tube settling district；
C, the mud perforated pipe of bottom, sloping plate deposition district are refluxed branch road according to water inlet ratio respectively by pipeline sludge pump by respective
Pump to anaerobic pond, two grades of anoxic pond, n-1 level anoxic pond and n level anoxic pond；The ratio pumped is propped up by sludge reflux
Pipe regulation valve and sludge reflux prop up flowmeter for pipe control；
D, membrane cisterna muddy water mixed solution concentration control at 0.5g/L-2.0g/L, when muddy water mixed solution concentration is more than 1.5g/L, and backflow portion
Point membrane cisterna mixed liquor is to one-level Aerobic Pond, two grades of Aerobic Ponds, n-1 level Aerobic Pond and n level Aerobic Pond；Membrane cisterna uses and " produces
Water aeration produce water aeration " mode intermittent aerating, single membrane module aeration rate is 4Nm3/ h～10Nm3/ h,
Aeration time 0.5min～2min, produces water time 4min-10min.
E, membranous system produce water and can directly discharge, or disinfection realizes regeneration.
Described tube settling district loads inclined tube, designs solid loading 150kg/m2*d-300kg/m2*d。
In described step A, anaerobic pond water inlet is the 35%-50% of total flow, two grades of anoxic pond, n-1 level anoxic pond and n level anoxia
Pond water inlet ratio is 0-25%；The 50%-150% that sludge reflux amount is inflow of the mud relief area described in step C；
Return sludge ratio is adjusted flexibly according to influent COD, total nitrogen load；The sludge reflux amount being back to anaerobic pond is total capacity of returns
35%-50%, two grades of anoxic pond, (n-1) level anoxic pond and the 0-25% that n level anoxic pond sludge reflux amount is total capacity of returns.
Described anaerobic pond, one-level anoxic pond, one-level Aerobic Pond, two grades of anoxic pond, two grades of Aerobic Ponds, (n-1) level anoxic pond,
(n-1) level Aerobic Pond, n level anoxic pond, n level Aerobic Pond sludge concentration are at 3.5g/L-8g/L；
The multistage AO coupling MBR of a kind of intensified denitrification and dephosphorization of the present invention saves energy and reduce the cost technique, is best suitable at town sewage
Reason.Anaerobic pond, two grades of anoxic pond, n-1 level anoxic pond, n level anoxic pond water inlets are connected to inlet pipeline, and flow of inlet water is by entering
Water props up way solenoid valve and water inlet branch road electromagnetic flowmeter regulation.The returned sludge of mud relief area enter in proportion anaerobic pond, two grades
Anoxic pond, n-1 level anoxic pond and n level anoxic pond, membrane cisterna mixed liquor enters Aerobic Pond at different levels in proportion, and sewage is at Aerobic Pond and film
Pond carries out inhaling phosphorus and nitration reaction, carries out anti-nitration reaction in anoxic pond and mud relief area, it is achieved the purpose of intensified denitrification and dephosphorization.
Fill inclined tube in mud relief area, design solid loading 150kg/m2*d-300kg/m2* d, excess sludge is refluxed by mud relief area
To 4, two grades of anoxic pond 7 of anaerobic pond, n-1 level anoxic pond 9 and n level anoxic pond 11, sludge reflux total amount is 50%-150%.
The sludge concentration of membrane cisterna controls at 0.5g/L-2.0g/L, uses intermittent aerating technique, simultaneously membranous system only by sludge reflux to anaerobism
Pond and each anoxic pond, and capacity of returns only has 50%-150%, is substantially reduced membranous system energy consumption.
The present invention and tradition A2O+MBR technique is compared, and MBR system of the present invention uses intermittent aerating, and aeration total amount reduces 40%,
Eliminating internal reflux, overall operation energy consumption reduces about 30%；Nitric efficiency improves more than 10%；Biological phosphor-removing effect is notable,
Dephosphorization without assistant chemical, film produces water and can reach below 0.3mg/L, has bigger advantages for development in urban wastewater treatment field.
Accompanying drawing explanation
Fig. 1 is that the multistage AO coupling MBR of a kind of intensified denitrification and dephosphorization of the present invention saves energy and reduce the cost process schematic representation；
Fig. 2 is the structural representation of the MBR membrane cisterna of the present invention.
In figure:
1: inlet pipeline 2: water inlet way solenoid valve 3: water inlet branch road electromagnetic flowmeter 4: anaerobic pond 5: one-level anoxic pond 6:
8: two grades of Aerobic Pond 9:n-1 level anoxic pond 10:n-1 level Aerobic Pond 11:n levels of 7: two grades of anoxic pond of one-level Aerobic Pond lack
Oxygen pond 12:n level Aerobic Pond 13:MBR system 14: membrane cisterna mixed-liquor return pipeline 15: valve 16: mud return line
Road 17: sludge reflux arm regulation valve 18: sludge reflux props up flowmeter for pipe 19: pipeline sludge pump 20: sloping plate deposition district 21:
Perforated pipe 22: aerating pipelines 23: membrane cisterna 24: membrane module 25: overfall 26: mud relief area.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is illustrated.
The multistage AO coupling MBR of a kind of intensified denitrification and dephosphorization saves energy and reduce the cost technique, is best suitable for for urban wastewater treatment.As
Shown in Fig. 1, including multistage AO bio-reaction zone and MBR system 13, the anaerobic pond 4 being sequentially communicated, one-level anoxic pond 5,
One-level Aerobic Pond 7, two grades of Aerobic Ponds 8 of 6, two grades of anoxic pond, n-1 level anoxic pond, 9, n-1 level Aerobic Pond 10, n level anoxic pond
11 and n level Aerobic Ponds 12 constitute multistage AO biological reaction pool, have the MBR system 13 of mud relief area 26 and membrane cisterna 23.
Former water sequentially enters 4, two grades of anoxic pond 7 of anaerobic pond from inlet pipeline 1 along water inlet branch road, n-1 level anoxic pond 9 and n level lacks
Oxygen pond 11, wherein n is the integer more than 3；Entering the flow of anaerobic pond and accounting for is the 35%-50% of total inflow, other anoxic pond
Flow of inlet water be sequentially reduced, two grades of anoxic pond, n-1 level anoxic pond and n level anoxic pond water inlet ratio are 0-25%；Feed water flow
Measure and regulated by water inlet way solenoid valve 2 and water inlet electromagnetic flowmeter 3.Former water enters anaerobic pond 4 and anoxic pond at different levels, former water
In carbon source can be utilized by denitrifying bacteria, promote denitrification denitrogenation.Anaerobic pond and anoxia at different levels it is back to from mud relief area
The mud in pond, containing relatively low dissolved oxygen, will not produce impact to denitrification denitrogenation while increasing sludge concentration.Mud buffers
The 50%-150% that sludge reflux amount is inflow in district；Return sludge ratio is adjusted flexibly according to influent COD, total nitrogen load；Return
It flow to the 35%-50% that sludge reflux amount is total capacity of returns of anaerobic pond, two grades of anoxic pond, (n-1) level anoxic pond and n level anoxia
Pond sludge reflux amount is the 0-25% of total capacity of returns.In membrane cisterna, the muddy water mixed solution of the low sludge concentration of high-solubility oxygen is back at different levels
Aerobic Pond, can promote that Aerobic Pond at different levels inhales phosphorus, beneficially biological phosphate-eliminating.Under the common effect of above-mentioned measure, finally realize
Intensified denitrification and dephosphorization.
As in figure 2 it is shown, the muddy water mixed solution of n level Aerobic Pond 11 enters mud relief area 26 through overfall 25, muddy water mixes
Liquid is after tube settling district 20 buffers, and supernatant enters membrane cisterna 23 by overfall 25；The mud of bottom, sloping plate deposition district
Perforated pipe 21 is pumped to leading portion anaerobic pond and anoxic pond at different levels by pipeline sludge pump 19, pumps to each anaerobic pond and each anoxic pond
Ratio by sludge reflux arm regulation valve 17 and sludge reflux prop up flowmeter for pipe control 18.Membrane cisterna muddy water mixed solution concentration controls
At 0.5g/L-2.0g/L, when muddy water mixed solution concentration is more than 1.5g/L, refluxing portion membrane cisterna mixed liquor to one-level Aerobic Pond, two grades
Aerobic Pond, n-1 level Aerobic Pond and n level Aerobic Pond.
Aerating pipelines 22 and membrane module 24 are set in membrane cisterna 23, are entered the mud relief area supernatant of membrane cisterna by overfall 25,
Sludge loading is low, it is not necessary to bigger aeration rate and frequently aeration time, therefore uses " produce water aeration and produce water aeration "
Mode intermittent aerating, aeration time 0.5min～2min, produce water time 4min-10min.Aeration rate is 4Nm3/ h～10Nm3/ h,
MBR operation energy consumption can reduce by more than 20%, it is achieved energy-saving and cost-reducing.
Claims (4)
1. the sewage treatment process of the aerobic coupled MBR of the multi-stage anaerobic of an intensified denitrification and dephosphorization, it is characterised in that: include multistage
AO bio-reaction zone and MBR system (13)；Described multistage AO bio-reaction zone by anaerobic pond (4), one-level anoxic pond
(5), one-level Aerobic Pond (6), two grades of anoxic pond (7), two grades of Aerobic Ponds (8), n-1 level anoxic pond (9), n-1 level Aerobic Pond (10),
N level anoxic pond (11), n level Aerobic Pond (12) are constituted；The water inlet of the anaerobic pond (4) of described multistage AO bio-reaction zone exists
Bottom pond, diagonal angle upper opening overflow enters one-level anoxic pond, and one-level anoxic pond diagonal angle bottom opening flows into one-level Aerobic Pond,
One-level Aerobic Pond diagonal angle upper opening enters two grades of anoxic pond, is sequentially connected in series to n level anoxic pond and n Aerobic Pond；Described MBR
System includes mud relief area (26) and membrane cisterna (23)；Described mud relief area (26) is connected with membrane cisterna (23) by overfall, mud
Arranging tube settling district (20) in relief area, bottom, sloping plate deposition district arranges mud perforated pipe (21),
The sewage disposal of intensified denitrification and dephosphorization is carried out as steps described below:
A, anaerobic pond (4), two grades of anoxic pond (7), (n-1) level anoxic pond (9) and the water inlet of n level anoxic pond (11)
Connecting inlet pipeline by respective water inlet branch road respectively, flow of inlet water is by each water inlet way solenoid valve and water inlet branch road
Electromagnetic flowmeter regulates, progression n >=2 grade；
The water side of B, n level Aerobic Pond (11) connects tube settling district (20)；
C, mud perforated pipe (21) of bottom, sloping plate deposition district are passed through each to reflux branch road according to entering by pipeline sludge pump (19)
Water ratio is pumped respectively to anaerobic pond (4), two grades of anoxic pond (7), n-1 level anoxic pond (9) and n level anoxic pond (11)；
The ratio pumped is propped up flowmeter for pipe control (18) by sludge reflux arm regulation valve (17) and sludge reflux；
D, membrane cisterna (23) muddy water mixed solution concentration control at 0.5g/L-2.0g/L, when muddy water mixed solution concentration is more than 1.5g/L,
Refluxing portion membrane cisterna mixed liquor is to one-level Aerobic Pond (6), two grades of Aerobic Ponds (8), n-1 level Aerobic Pond (10) and n
Level Aerobic Pond (12)；Membrane cisterna (23) uses the mode intermittent aerating of " produce water aeration and produce water aeration ", single
Propping up membrane module aeration rate is 4Nm3/ h～10Nm3/ h, aeration time 0.5min～2min, produce water time 4min-10min.
E, membranous system produce water and can directly discharge, or disinfection realizes regeneration.
The sewage treatment process of the aerobic coupled MBR of multi-stage anaerobic of intensified denitrification and dephosphorization the most according to claim 1, it is special
Levy and be: described tube settling district loads inclined tube, designs solid loading 150kg/m2*d-300kg/m2*d。
The sewage treatment process of the aerobic coupled MBR of multi-stage anaerobic of intensified denitrification and dephosphorization the most according to claim 1, it is special
Levying and be, in described step A, anaerobic pond (4) water inlet is the 35%-50% of total flow, two grades of anoxic pond (7), n-1 level anoxias
Pond (9) and n level anoxic pond (11) water inlet ratio are 0-25%；The mud of the mud relief area (26) described in step C
Capacity of returns is the 50%-150% of inflow；It is back to the 35%-50% that sludge reflux amount is total capacity of returns of anaerobic pond (4), two grades
Anoxic pond (7), (n-1) level anoxic pond (9) and the 0-25% that n level anoxic pond (11) sludge reflux amount is total capacity of returns.
The sewage treatment process of the aerobic coupled MBR of multi-stage anaerobic of intensified denitrification and dephosphorization the most according to claim 1, it is special
Levy and be, described anaerobic pond (4), one-level anoxic pond (5), one-level Aerobic Pond (6), two grades of anoxic pond (7), two grades good
Oxygen pond (8), n-1 level anoxic pond (9), n-1 level Aerobic Pond (10), n level anoxic pond (11), the dirt of n level Aerobic Pond (12)
Mud concentration is at 3.5g/L-8g/L.
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Cited By (13)
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| CN106145453A (en) * | 2016-08-31 | 2016-11-23 | 华仪环保有限公司 | Integrated sewage treating apparatus |
| CN106219742A (en) * | 2016-08-31 | 2016-12-14 | 曹雯雯 | Integral type film biological reactor for campus waste water recycling |
| CN107089727A (en) * | 2017-06-27 | 2017-08-25 | 重庆大学 | A kind of integral type three-level AO sewage disposal systems and its handling process |
| CN108178297A (en) * | 2018-02-07 | 2018-06-19 | 云南合续环境科技有限公司 | A kind of integral life sewage processing method and its device |
| CN108358314A (en) * | 2018-03-08 | 2018-08-03 | 中国市政工程中南设计研究总院有限公司 | Sludge closes on reflux bioreactor facility in combination and application |
| CN108726678A (en) * | 2018-05-02 | 2018-11-02 | 长沙中联重科环境产业有限公司 | Integrated sewage treating apparatus |
| CN108862560A (en) * | 2018-07-25 | 2018-11-23 | 苏州市排水有限公司 | A kind of multi-mode integrated sewage treating apparatus |
| CN108996840A (en) * | 2018-08-30 | 2018-12-14 | 中国葛洲坝集团水务运营有限公司 | The sewage disposal device and its method that enhanced biological nitrogen removal is combined with ceramic membrane |
| CN109485201A (en) * | 2017-09-11 | 2019-03-19 | 四川君和环保股份有限公司 | A kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization |
| GB2574621A (en) * | 2018-06-13 | 2019-12-18 | Univ Chengdu Information Technology | Integrated treatment technology device for swine wastewater |
| CN110803768A (en) * | 2019-11-29 | 2020-02-18 | 中联环股份有限公司 | Sewage treatment device and treatment process thereof |
| CN113860633A (en) * | 2021-09-14 | 2021-12-31 | 华设设计集团股份有限公司 | Integrated sewage treatment device and method for expressway service area |
| CN116573723A (en) * | 2023-06-16 | 2023-08-11 | 国合绿能生态(无锡)有限公司 | Sewage biological denitrification process and device based on multistage and multistage AO (anaerobic-anoxic) process |
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| CN106219742A (en) * | 2016-08-31 | 2016-12-14 | 曹雯雯 | Integral type film biological reactor for campus waste water recycling |
| CN106145453A (en) * | 2016-08-31 | 2016-11-23 | 华仪环保有限公司 | Integrated sewage treating apparatus |
| CN107089727A (en) * | 2017-06-27 | 2017-08-25 | 重庆大学 | A kind of integral type three-level AO sewage disposal systems and its handling process |
| CN109485201A (en) * | 2017-09-11 | 2019-03-19 | 四川君和环保股份有限公司 | A kind for the treatment of process and device for city domestic sewage multistage A/O combined denitrification dephosphorization |
| CN108178297A (en) * | 2018-02-07 | 2018-06-19 | 云南合续环境科技有限公司 | A kind of integral life sewage processing method and its device |
| CN108358314A (en) * | 2018-03-08 | 2018-08-03 | 中国市政工程中南设计研究总院有限公司 | Sludge closes on reflux bioreactor facility in combination and application |
| CN108358314B (en) * | 2018-03-08 | 2023-05-05 | 中国市政工程中南设计研究总院有限公司 | Sludge near reflux bioreactor, combined facility and application thereof |
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| CN108726678A (en) * | 2018-05-02 | 2018-11-02 | 长沙中联重科环境产业有限公司 | Integrated sewage treating apparatus |
| GB2574621B (en) * | 2018-06-13 | 2021-11-10 | Univ Chengdu Information Technology | Integrated treatment technology device for swine wastewater |
| GB2574621A (en) * | 2018-06-13 | 2019-12-18 | Univ Chengdu Information Technology | Integrated treatment technology device for swine wastewater |
| CN108862560A (en) * | 2018-07-25 | 2018-11-23 | 苏州市排水有限公司 | A kind of multi-mode integrated sewage treating apparatus |
| CN108862560B (en) * | 2018-07-25 | 2024-02-13 | 苏州市排水有限公司 | Multi-mode integrated sewage treatment device |
| CN108996840A (en) * | 2018-08-30 | 2018-12-14 | 中国葛洲坝集团水务运营有限公司 | The sewage disposal device and its method that enhanced biological nitrogen removal is combined with ceramic membrane |
| CN108996840B (en) * | 2018-08-30 | 2024-04-19 | 葛洲坝集团生态环保有限公司 | Sewage treatment equipment and method for strengthening combination of biological denitrification and flat ceramic membrane |
| CN110803768A (en) * | 2019-11-29 | 2020-02-18 | 中联环股份有限公司 | Sewage treatment device and treatment process thereof |
| CN113860633A (en) * | 2021-09-14 | 2021-12-31 | 华设设计集团股份有限公司 | Integrated sewage treatment device and method for expressway service area |
| CN116573723A (en) * | 2023-06-16 | 2023-08-11 | 国合绿能生态(无锡)有限公司 | Sewage biological denitrification process and device based on multistage and multistage AO (anaerobic-anoxic) process |
| CN116573723B (en) * | 2023-06-16 | 2023-12-15 | 国合绿能生态(无锡)有限公司 | Sewage biological denitrification process and device based on multistage and multistage AO (anaerobic-anoxic) process |
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Application publication date: 20160817 |