CN101921040A - Device and method for processing C/N urban household wastewater by A2O-BAF (Biological Aerated Filter) process - Google Patents
Device and method for processing C/N urban household wastewater by A2O-BAF (Biological Aerated Filter) process Download PDFInfo
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- CN101921040A CN101921040A CN 201010204702 CN201010204702A CN101921040A CN 101921040 A CN101921040 A CN 101921040A CN 201010204702 CN201010204702 CN 201010204702 CN 201010204702 A CN201010204702 A CN 201010204702A CN 101921040 A CN101921040 A CN 101921040A
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Abstract
The invention discloses a device and a method for processing C/N urban household wastewater by an A2O-BAF (Biological Aerated Filter) process. The device comprises a water inlet tank, an A2O reactor, a secondary sedimentation tank, an intermediate water tank, a BAF reactor and a water outlet tank connected in sequence. Raw water and return sludge are pumped from the water inlet tank to an anaerobic zone; mixed liquor in the anaerobic zone and nitration liquor enter in the anaerobic zone; the mixed liquor in the anaerobic zone then enters in an aerobic zone; mixed liquor from the A2O enters in the intermediate water tank; supernate is pumped from the intermediate water tank to the BAF; sludge in the secondary sedimentation tank reflows to the anaerobic zone; the separated supernate enters in the BAF in which effluents water enters in the water outlet tank; and part of water in the water outlet tank reflows to an anoxic zone and the other part is discharged. The invention reduces the aeration amount, saves carbon sources, effectively improves the nitration and prolongs the backwashing time of the BAF.
Description
Technical field
The present invention relates to a kind of city domestic sewage treatment unit and method, can make low C/N sanitary sewage reach the advanced nitrogen dephosphorization, belong to sewage treatment area.
Background technology
The excessive emissions of nitrogen and phosphoric becomes the important factor of body eutrophication, and the topmost approach of control body eutrophication is exactly the denitrogenation dephosphorizing that sewage is carried out the degree of depth, begins control from polluting the source.The factor that influences sewage disposal has a lot, and wherein important is carbon source.And the obvious characteristics of China's city domestic sewage is exactly low C/N, and this proposes the denitrogenation dephosphorizing that a technology can be carried out the sanitary sewage that hangs down C/N the degree of depth with regard to requiring us.Nearly all synchronous denitrogen dephosphorus technology all is that single sludge system is that different physiological habit microorganisms such as nitrobacteria, denitrifying bacterium and polyP bacteria live in the same microbial environment.Environment requirement microorganism inequality is lived in together, can't guarantee that they can grow up under the optimum environment separately, this must influence treatment effect.Be apparent that most that polyP bacteria requires to make that to the different of sludge age denitrogenation and dephosphorization form the contradiction of opposition with nitrobacteria, often becomes the low major cause of efficient instability, compliance rate of single sludge system synchronous denitrification dephosphorizing.
A
2O technology is as the simplest a kind of synchronous denitrification dephosphorizing list mud technology, having series of advantages such as simple structure, hydraulic detention time weak point, design and operation experience maturation, the little and difficult generation sludge bulking of control polygamy, is the main process of at present domestic and international town sewage plant.Reach a good state yet be difficult to make denitrogenation dephosphorizing to stablize for above-mentioned reasons, this transforms and optimization and upgrading at the deficiency of its technology with regard to requiring us.
BAF with its modular design flexibly, advantage more and more is subjected to people's such as floor space is little, nitrification effect is stable favor.Its topmost function is to provide a good nitrated environment for nitrobacteria.
At A
2The advantage of O technology inherent defective and BAF has proposed A
2The two sludge systems of O-BAF, this technology places BAF after the second pond, its main purpose is to finish nitration reaction, and organic removal, dephosphorization, denitrification all A
2Carry out among the O.The effluent recycling of most of BAF is to A
2The anoxic section of O is inhaled phosphorus for denitrification and anoxic provides electron acceptor(EA).
Summary of the invention
The objective of the invention is to provide a kind of A
2The apparatus and method of the low C/N city domestic sewage of O-BAF (anaerobic-anoxic-aerobic and biological aerated filter) art breading, solve the advanced nitrogen dephosphorization technique of low C/N sanitary sewage, make water quality treatment reach country-level A emission standard.
Technical scheme of the present invention: a kind of A
2The device of the low C/N city domestic sewage of O-BAF art breading comprises water tank inlet (1), the A that is linked in sequence
2O reactor (2), second pond (3), intermediate water tank (4), BAF reactor (5) and go out water tank (6), A
2The anaerobic zone and the oxygen-starved area of O reactor are respectively equipped with whipping appts, and mud return line road, second pond (3) sludge bucket bottom is by reflux pump and A
2The anaerobism section feed-water end of O (2) is connected, and goes out water tank (6) by nitrification liquid return line and reflux pump and A
2The oxygen-starved area feed-water end of O reactor (2) is connected.
A kind of A
2The method of the low C/N city domestic sewage of O-BAF art breading comprises following step:
(1) former water pumps into A through peristaltic pump from water tank inlet (1)
2The anaerobic zone of O (2), the returned sluge that also has second pond (3) that enters simultaneously, after the mud of anaerobic zone mixed, polyP bacteria absorbed the organism of 82-88% in the former water approximately, and was stored in its organism with the form of PHAs, discharged phosphorus simultaneously.
(2) mixed solution of anaerobic zone enters A
2The oxygen-starved area of O (2), what enter the oxygen-starved area simultaneously also has from the nitrification liquid that goes out in the water tank (6), and what finish in this stage is that denitrification and anoxic are inhaled the phosphorus effect.
(3) mixed solution of oxygen-starved area enters A subsequently
2The aerobic zone of O (2), the main effect in this stage are further to absorb remaining phosphorus, remove the organism of 2-5% simultaneously.
(4) from A
2The mixed solution of O (2) process section enters second pond (3), realize the mud-water separation of mixed solution, mixed solution flow into intermediate water tank (4) from second pond, the supernatant liquor that is rich in ammonia nitrogen is pumped among the BAF (5) by intermediate water tank (4) through high-pressure pump (8), and sedimentary mud is back to A again in second pond (3) bucket
2The anaerobic zone of O (2).
(5) enter BAF (5) through the isolating supernatant liquor of second pond (3), the main function of BAF (5) is to realize the nitrification of aerobic nitrification microbial film to ammonia nitrogen.
(6) BAF (5) water outlet finally enters out water tank (6), and the nitrification liquid that goes out in the water tank (6) is back to A
2The oxygen-starved area of O (2), nitrification liquid reflux ratio are 200%-300%, another part discharging.
Beneficial effect of the present invention:
Adopt A
2The O-BAF art breading is hanged down C/N actual cities sanitary sewage, can give full play to A
2O technology and BAF technology advantage separately.Because A
2The anoxic section of O system is longer, provide good living environment thereby aerobic section is short to denitrifying phosphorus removing bacteria, denitrifying phosphorus removing bacteria is able to a large amount of breedings, has so promptly saved carbon source and can utilize limited carbon source in the former water again fully, and short aerobic section can effectively be saved aeration rate again.BAF is arranged on the turbidity that the last process section can effectively reduce water outlet.Nitrobacteria and polyP bacteria are separated in two advanced nitrogen dephosphorization efficiency by using that independently guaranteed system in the system, make water quality treatment reach country-level A emission standard.The present invention can be widely used in big-and-middle cities and towns municipal sewage treatment, is specially adapted to adopt with A
2The sewage work of O technology.At first should take certain method to start BAF and whole system fast, and determine the influence factor of each process section according to the influent quality of locality.Treat to adjust some parameter and control law according to practical operation situation behind the system stability, for example reflux ratio, sedimentation time etc. are to obtain the ideal effluent quality.A of the present invention
2The method of the low C/N sanitary sewage of O-BAF art breading can be widely used in the sanitary sewage disposal in large, medium and small city, and the transformation and the optimization and upgrading of old water factory had certain reference value.
The present invention has the following advantages:
(1) traditional A
2O technology places same system with denitrogenation and dephosphorization, and topmost problem is the contradiction that has sludge age, and this technology places two systems to carry out respectively nitrated and dephosphorization, has solved the nitrobacteria contradiction different to the sludge age requirement with polyP bacteria.
(2) traditional A
2The O process sludge is generally very long age, and corresponding aerobic section is also longer, consider that mainly the generation time of nitrobacteria is long, and this combination process nitrification is carried out in BAF mainly, so preposition A
2The required aerobic section of O is shorter, thereby has reduced aeration rate.A
2The main purpose of short aerobic section among the O is that the anoxic section is not blotted clean phosphorus further to be removed, rather than is used for nitrification.
(3) when handling the sanitary sewage of low C/N ratio, preposition A
2O can provide an adapt circumstance to denitrifying phosphorus removing bacteria, and denitrification dephosphorization will be the principal mode of system's dephosphorization, and this just can save carbon source and effectively utilize carbon source.
(4) since organism and suspended matter mostly all at A
2Remove among the O, this more helps the carrying out of nitrification among the BAF, and the long feature of microbial film sludge age can effectively improve nitrification efficiency, prolongs the backwashing time of BAF simultaneously.
(5) A
2A in the O-BAF technology
2The O water outlet contains a small amount of nitrate and nitrite, the mud that is difficult in the second pond taking place to produce because of denitrification floats, after returned sluge is back to the anaerobism section, the dispose procedure of anaerobic, thereby easier formation anaerobic condition, strengthened in the former water organophosphorus in the phosphorus rate of releasing of anaerobism section, so that better inhale phosphorus in anoxic section and aerobic section.
Description of drawings
Fig. 1 is A
2O-BAF process unit and schematic flow sheet;
1-water tank inlet among the figure; 2-A
2The O system; The 3-second pond; The 4-intermediate water tank; The 5-BAF system; 6-goes out water tank; The 7-peristaltic pump; The 8-high-pressure pump;
Embodiment
Embodiment 1
A kind of A
2The device of the low C/N city domestic sewage of O-BAF art breading comprises water tank inlet (1), the A that is linked in sequence
2O reactor (2), second pond (3), intermediate water tank (4), BAF reactor (5) and go out water tank (6) and constitute.A
2The anaerobic zone and the oxygen-starved area of O reactor are respectively equipped with whipping appts, and mud return line road, second pond (3) sludge bucket bottom is by reflux pump and A
2The anaerobism section feed-water end of O (2) is connected, and goes out water tank (6) by nitrification liquid return line and reflux pump and A
2The oxygen-starved area feed-water end of O reactor (2) is connected.
This sewage water treatment method has following step:
(1) former water pumps into A through peristaltic pump from water tank inlet (1)
2The anaerobic zone of O (2), the returned sluge that also has second pond (3) that enters simultaneously, after the mud of anaerobic zone mixed, polyP bacteria absorbed the organism of 82-88% in the former water approximately, and was stored in its organism with the form of PHAs, discharged phosphorus simultaneously.
(2) mixed solution of anaerobic zone enters A
2The oxygen-starved area of O (2), what enter the oxygen-starved area simultaneously also has from the nitrification liquid that goes out in the water tank (6), and what finish in this stage is that denitrification and anoxic are inhaled the phosphorus effect.
(3) mixed solution of oxygen-starved area enters A subsequently
2The aerobic zone of O (2), the main effect in this stage are further to absorb remaining phosphorus, remove the organism of 2-5% simultaneously.
(4) from A
2The mixed solution of O (2) process section enters second pond (3), realize the mud-water separation of mixed solution, mixed solution flow into intermediate water tank (4) from second pond, the supernatant liquor that is rich in ammonia nitrogen is pumped among the BAF (5) by intermediate water tank (4) through high-pressure pump (8), and sedimentary mud is back to A again in second pond (3) bucket
2The anaerobic zone of O (2).
(5) enter BAF (5) through the isolating supernatant liquor of second pond (3), the main function of BAF (5) is to realize the nitrification of aerobic nitrification microbial film to ammonia nitrogen.
(6) BAF (5) water outlet finally enters out water tank (6), and the water major part that goes out in the water tank (6) is back to A
2The oxygen-starved area of O (2), another part discharging.
Raw water tubes, water tank inlet, pump, A
2O, second pond, BAF, rising pipe are connected in proper order: anaerobic pond and anoxic pond are built-in with whipping appts; Between second pond bottom and anaerobic pond, be communicated with mud return line; Go out and be communicated with the nitrification liquid return line between water tank and the anoxic pond; The nitrification liquid control of reflux ratio is between 200%-300%.
This A
2O-BAF advanced nitrogen dephosphorization apparatus is by the 1-water tank inlet; 2-A
2The O system; The 3-second pond; The 4-intermediate water tank; The 5-BAF system; 6-goes out water tank; The 7-peristaltic pump; The 8-high-pressure pump is formed.
Idiographic flow is: former water is introduced into A
2The anaerobism section of O technology, polyP bacteria absorb the organism of a large amount of easy degradeds stores in vivo with the form of PHAs, and discharges a large amount of phosphorus, and mixed solution and most BAF water outlet enter A together
2The anoxic section of O, denitrifying bacteria are electron acceptor(EA) with the nitric nitrogen, and organism is that electron donor carries out denitrification, and denitrifying phosphorus removing bacteria utilizes nitric nitrogen to be electron acceptor(EA), and intravital PHAs is that electron donor carries out the denitrification dephosphorization effect.At A
2The aerobic section polyP bacteria of O further absorbs remaining phosphorus.Mixed solution enters the BAF process section through second pond and carries out nitrification subsequently.Most of effluent recycling of BAF is to A
2The anoxic section of O, remaining treating water directly discharges.This technology has solved the advanced nitrogen dephosphorization to low C/N sanitary sewage.
The present invention can be widely used in big-and-middle cities and towns municipal sewage treatment, is specially adapted to adopt with A
2The sewage work of O technology.At first should take certain method to start BAF and whole system fast, and determine the influence factor of each process section according to the influent quality of locality.Treat to adjust some parameter and control law according to practical operation situation behind the system stability, for example reflux ratio, sedimentation time etc. are to obtain the ideal effluent quality.
With the real life sewage of certain university dependents' district discharging as experimental subjects (TN=60-85mg/L, average C/N is than 4.3 for pH=6.5-7.5, COD=230-320mg/L).A
2O is made of 9 lattice chambers, and total useful volume is 30.5L, and first lattice chamber is an anaerobic zone, and subsequently 6 is the oxygen-starved area, and remaining 2 is aerobic zone, and promptly the volumetric ratio of anaerobic zone, oxygen-starved area and aerobic zone is 1: 6: 2.A
214.2 ℃ of the water inlet medial temperatures of O, flooding quantity is 3.8L/h, and DO is controlled at 1.5mg/L, and corresponding HRT is 8h, and MLSS is about about 3500mg/L, and SRT is 15d, and nitrification liquid refluxes 300%, and mud refluxes 100%, BAF void tower volume 15L, actual HRT is 20min.Less than 14mg/L, total phosphorus reaches country-level (A) emission standard less than 0.5mg/L to COD less than 50mg/L, total nitrogen in the final outflow water.
Claims (2)
1. A
2The device of the low C/N city domestic sewage of O-BAF art breading is characterized in that, comprises the water tank inlet (1), the A that are linked in sequence
2O reactor (2), second pond (3), intermediate water tank (4), BAF reactor (5) and go out water tank (6), A
2The anaerobic zone and the oxygen-starved area of O reactor are respectively equipped with whipping appts, and mud return line road, second pond (3) sludge bucket bottom is by reflux pump and A
2The anaerobism section feed-water end of O (2) is connected, and goes out water tank (6) by nitrification liquid return line and reflux pump and A
2The oxygen-starved area feed-water end of O reactor (2) is connected.
2. A
2The method of the low C/N city domestic sewage of O-BAF art breading is characterized in that, comprises following step:
(1) former water pumps into A through peristaltic pump from water tank inlet (1)
2The anaerobic zone of O (2), the returned sluge that also has second pond (3) that enters simultaneously, after the mud of anaerobic zone mixed, polyP bacteria absorbed organism in the former water, and was stored in its organism with the form of PHAs, discharged phosphorus simultaneously;
(2) mixed solution of anaerobic zone enters A
2The oxygen-starved area of O (2), what enter the oxygen-starved area simultaneously also has from the nitrification liquid that goes out in the water tank (6), and what finish in this stage is that denitrification and anoxic are inhaled the phosphorus effect;
(3) mixed solution of oxygen-starved area enters A subsequently
2The aerobic zone of O (2);
(4) from A
2The mixed solution of O (2) process section enters second pond (3), realize the mud-water separation of mixed solution, mixed solution flow into intermediate water tank (4) from second pond, the supernatant liquor that is rich in ammonia nitrogen is pumped among the BAF (5) by intermediate water tank (4) through high-pressure pump (8), and sedimentary mud is back to A again in second pond (3) bucket
2The anaerobic zone of O (2);
(5) enter BAF (5) through the isolating supernatant liquor of second pond (3), BAF (5) realizes the nitrification of aerobic nitrification microbial film to ammonia nitrogen;
(6) BAF (5) water outlet finally enters out water tank (6), and the nitrification liquid that goes out in the water tank (6) is back to A
2The oxygen-starved area of O (2), nitrification liquid reflux ratio are 200%-300%, another part discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010204702 CN101921040A (en) | 2010-06-11 | 2010-06-11 | Device and method for processing C/N urban household wastewater by A2O-BAF (Biological Aerated Filter) process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010204702 CN101921040A (en) | 2010-06-11 | 2010-06-11 | Device and method for processing C/N urban household wastewater by A2O-BAF (Biological Aerated Filter) process |
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| CN101921040A true CN101921040A (en) | 2010-12-22 |
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| CN 201010204702 Pending CN101921040A (en) | 2010-06-11 | 2010-06-11 | Device and method for processing C/N urban household wastewater by A2O-BAF (Biological Aerated Filter) process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531298A (en) * | 2012-03-02 | 2012-07-04 | 北京工业大学 | Sewage treatment device and method for enhanced denitrification A/A/O (Anodic Aluminum Oxide) and deoxygenation BAF (Biological Aerated Filter) |
| CN102583743A (en) * | 2012-03-02 | 2012-07-18 | 北京工业大学 | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method |
| CN103663867A (en) * | 2013-12-02 | 2014-03-26 | 北京工业大学 | Device and method of residual sludge alkaline fermentation and inner carbon source development technology coupled with A-A-O nitrogen and phosphorous removal system |
| WO2016021766A1 (en) * | 2014-08-06 | 2016-02-11 | 경기도 | System for advanced sewage and wastewater treatment using optimum microorganisms for pollutants and method therefor |
| CN105585226A (en) * | 2016-03-04 | 2016-05-18 | 云南大学 | AAONAO continuous flow two-sludge denitrification advanced nitrogen removal and dephosphorization device and technology based on online control |
| CN112225397A (en) * | 2020-09-28 | 2021-01-15 | 北京恩菲环保技术有限公司 | Sewage treatment system and method based on double-sludge denitrification dephosphorization and biological filter tower |
-
2010
- 2010-06-11 CN CN 201010204702 patent/CN101921040A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 《中国给水排水》 20060430 缪佳等 短好氧泥龄下A2/O和BAF联合工艺的脱氮除磷特性 第69-73页 1-2 第22卷, 第7期 2 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531298A (en) * | 2012-03-02 | 2012-07-04 | 北京工业大学 | Sewage treatment device and method for enhanced denitrification A/A/O (Anodic Aluminum Oxide) and deoxygenation BAF (Biological Aerated Filter) |
| CN102583743A (en) * | 2012-03-02 | 2012-07-18 | 北京工业大学 | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method |
| CN102583743B (en) * | 2012-03-02 | 2013-10-23 | 北京工业大学 | Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method |
| CN103663867A (en) * | 2013-12-02 | 2014-03-26 | 北京工业大学 | Device and method of residual sludge alkaline fermentation and inner carbon source development technology coupled with A-A-O nitrogen and phosphorous removal system |
| WO2016021766A1 (en) * | 2014-08-06 | 2016-02-11 | 경기도 | System for advanced sewage and wastewater treatment using optimum microorganisms for pollutants and method therefor |
| CN105585226A (en) * | 2016-03-04 | 2016-05-18 | 云南大学 | AAONAO continuous flow two-sludge denitrification advanced nitrogen removal and dephosphorization device and technology based on online control |
| CN105585226B (en) * | 2016-03-04 | 2018-02-06 | 云南大学 | A kind of AAONAO continuous flow double sludge denitrification advanced nitrogen dephosphorization apparatus and technique based on On-line Control |
| CN112225397A (en) * | 2020-09-28 | 2021-01-15 | 北京恩菲环保技术有限公司 | Sewage treatment system and method based on double-sludge denitrification dephosphorization and biological filter tower |
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Application publication date: 20101222 |