CN102086062A - Device and method for processing aerobic biofilm bypass flow A2O (Anaeroxic-Anoxic-Oxic) process of low C/N (Carbon-Nitrogen) urban sewage - Google Patents
Device and method for processing aerobic biofilm bypass flow A2O (Anaeroxic-Anoxic-Oxic) process of low C/N (Carbon-Nitrogen) urban sewage Download PDFInfo
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- CN102086062A CN102086062A CN 201010597286 CN201010597286A CN102086062A CN 102086062 A CN102086062 A CN 102086062A CN 201010597286 CN201010597286 CN 201010597286 CN 201010597286 A CN201010597286 A CN 201010597286A CN 102086062 A CN102086062 A CN 102086062A
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Abstract
The invention discloses a device and method for processing the aerobic biofilm bypass flow A2O (Anaeroxic-Anoxic-Oxic) process of low C/N (Carbon-Nitrogen) urban sewage, belonging to the field of sewage treatment. The method comprises the following steps of: enabling partial raw water and the returned sludge of a secondary sedimentation tank to together enter a pre-anoxic zone of an A2O reactor; removing nitric nitrogen in the refluxed sludge by denitrifying bacteria through denitrification; enabling the raw water to simultaneously enter an anaerobic zone of the A2O reactor, absorbing a great amount of biodegradable organic matter by poly-p bacteria in the anaerobic zone, storing in vivo in a PHAs mode and releasing a great amount of phosphor; and enabling mixed liquid and nitrified liquid from the aerobic terminal to together enter the anoxic zone of the A2O reactor, carrying out denitrification by using the denitrifying bacteria with the nitric nitrogen as an electronic receptor and organic matter as an electronic donator, and carrying out denitrification dephosphorization by using denitrification dephosphorization bacteria with the nitric nitrogen as the electronic receptor and the in-vivo PHAs as the electronic donator. The aerobic zone of the A2O reactor is mainly used for nitrification.
Description
Technical field
The present invention relates to a kind of urban sewage treating device and method, can make low C/N sewage reach the advanced nitrogen dephosphorization, belong to sewage treatment area.
Background technology
" eutrophication " that nutritive element excessive emissions such as nitrogen phosphorus are caused constitutes a serious threat for people's ordinary production life, 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.Carbon source is to influence one of important factor of sewage disposal, 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 has series of advantages such as simple structure, flexible operation, design and operation experience maturation, the little and difficult generation sludge bulking of control polygamy and is widely used in domestic and international large-scale wastewater treatment plant as one of a kind of most common synchronization denitrogenation dephosphorizing list mud technology.Yet, nitrobacteria and polyP bacteria be difficult to make A in the same system because living in
2O technology denitrogenation dephosphorizing is stable to reach a good state, and this transforms and optimization and upgrading at the deficiency of its technology with regard to requiring us.
At A
2The existing defective of O technology has proposed suspension aerobic biologic membrane by-pass flow A
2O technology, this technology is put into aerobic zone with floated biologic packing material, and its main purpose is effectively to finish nitrification.
Summary of the invention
The objective of the invention is to provide a kind of aerobic biologic membrane by-pass flow A
2O (aerobic biofilm A
2O system) method and apparatus of the low C/N municipal effluent of art breading will solve the advanced nitrogen dephosphorization technique that hangs down C/N sewage.
Technical scheme of the present invention: a kind of aerobic biologic membrane by-pass flow A that handles low C/N municipal effluent
2The O process unit comprises the water tank inlet 1, the A that are linked in sequence
2O reactor 2, second pond 3, go out water tank 4, peristaltic pump 5 and biofilm packing 6 constitutes, wherein A
2O reactor 2 is divided into pre-oxygen-starved area 7, anaerobic zone 8, oxygen-starved area 9 and aerobic zone 10, and oxygen-starved area 7, anaerobic zone 8 and oxygen-starved area 9 are respectively equipped with whipping appts in advance, at the bottom and the A of second pond 3
2The O reactor is communicated with mud return line, A between the 2 pre-oxygen-starved areas
2Be communicated with the nitrification liquid return line between the aerobic zone 10 of O reactor 2 and the oxygen-starved area 9.
Utilize above-mentioned device to handle the aerobic biologic membrane by-pass flow A of low C/N municipal effluent
2The O processing method, this sewage water treatment method has following step:
(a) former water pumps into A through peristaltic pump 5 respectively in two separate ranks from water tank inlet 1
2The pre-oxygen-starved area 7 of O reactor 2 and anaerobic zone 8, enter into the returned sluge of also having of pre-oxygen-starved area 7 simultaneously from second pond 3, its former water ratio that enters into pre-oxygen-starved area 7 and anaerobic zone 8 is 1: 4, anaerobic zone 8 polyP bacterias absorb the organism in the former water, and be stored in its organism with the form of PHAs, discharge a large amount of phosphorus simultaneously;
(b) mixed solution of anaerobic zone 8 enters A
2The oxygen-starved area 9 of O reactor 2, what enter oxygen-starved area 9 simultaneously also has from A
2The nitrification liquid of O reactor 2 aerobic zones 10 ends;
(c) mixed solution of oxygen-starved area enters A subsequently
2The aerobic zone 10 of O reactor 2 carries out nitration reaction, and further absorbs oxygen-starved area 9 and do not suck remaining phosphorus, removes the organism of 2-5% simultaneously;
(d) from A
2The mixed solution that the O reactor is 2 sections enters second pond 3, realizes the mud-water separation of mixed solution, and supernatant liquor flow into out water tank 4, finally by going out water tank 4 dischargings.
In the processing method of above-mentioned processing mud, step (b) nitrification liquid control of reflux ratio is 200%, and the return sludge ratio of step (a) is 50%-100%, A
2 Aerobic zone 10 dissolved oxygens of O technology remain on 3mg/L, sludge age 15d, hydraulic detention time 8h.
Beneficial effect of the present invention:
Adopt aerobic biologic membrane by-pass flow A
2The O art breading is hanged down the C/N municipal effluent, can solve A
2The problem of polyP bacteria and nitrobacteria sludge age contradiction in the O technology.Filler is placed A
2The aerobic zone nitrobacteria of O technology can be attached on the biologic packing material, thereby can effectively prolong the sludge age of nitrobacteria, and then improves nitrated rate.The present invention can be widely used in big-and-middle cities and towns municipal sewage treatment, is specially adapted to adopt A
2The sewage work of O technology.The residence time that can reduce aerobic zone simultaneously promptly reduces the length of aerobic zone.Aerobic biologic membrane by-pass flow A of the present invention
2The method of the low C/N municipal effluent of O 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, and the advanced nitrogen dephosphorization of sewage provides effective theoretical foundation under the low C/N condition.
The present invention has the following advantages:
(1) traditional A
2O technology places same Sludge System with denitrogenation and dephosphorization, topmost problem is the contradiction that has polyP bacteria and nitrobacteria sludge age, and this technology nitrification is mainly finished on biologic packing material, thereby dephosphorization has then solved the nitrobacteria contradiction different to the sludge age requirement with polyP bacteria by Sludge System.
(2) traditional A
2The very long aerobic zone of O arts demand carries out nitrification, and its generation time of mainly considering nitrobacteria is longer, and this combination process nitrification is mainly carried out on the biologic packing material in aerobic zone, thereby has reduced the length of aerobic zone.
(3) when handling the sanitary sewage of low C/N ratio, A
2O technology 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) this technological design its main purpose of pre-oxygen-starved area be to utilize the organism in the part water inlet that the nitric nitrogen in the returned sluge is removed, can avoid nitric nitrogen anaerobic zone to be released the influence of phosphorus effect like this.Release the clearance that phosphorus fully could guarantee phosphorus.
Description of drawings
Fig. 1 is aerobic biologic membrane by-pass flow A
2O process unit and schematic flow sheet;
1-water tank inlet among the figure; 2-A
2The O reactor; The 3-second pond; 4-goes out water tank; The 5-peristaltic pump; The 6-filler; The pre-oxygen-starved area of 7-; The 8-anaerobic zone; The 9-oxygen-starved area; The 10-aerobic zone.
Embodiment
Embodiment 1
A kind of aerobic biologic membrane by-pass flow A that handles low C/N municipal effluent
2The device of O technology comprises water tank inlet 1, the A that is linked in sequence
2O reactor 2, second pond 3, go out water tank 4 and constitute.A
2O reactor 2 is divided into pre-oxygen-starved area 7, anaerobic zone 8, oxygen-starved area 9 and aerobic zone 10.A
2The pre-oxygen-starved area 7 of O reactor, anaerobic zone 8 and oxygen-starved area 9 are respectively equipped with whipping appts, and mud return line road, second pond 3 sludge bucket bottom is by reflux pump and A
2Pre-oxygen-starved area 7 feed-water ends of O reactor 2 are connected A
210 water outlets of O2 aerobic zone are by nitrification liquid return line and reflux pump and A
2Oxygen-starved area 9 feed-water ends of O reactor 2 are connected.
This sewage water treatment method has following step:
(a) former water pumps into A through peristaltic pump respectively in two separate ranks from water tank inlet 1
2The pre-oxygen-starved area 7 of O reactor 2 and anaerobic zone 8, enter into the returned sluge of also having of pre-oxygen-starved area 7 simultaneously from second pond 3, pre-oxygen-starved area 7 denitrifying bacterias with returned sluge in the residue nitric nitrogen remove, in order to avoid influence the phosphorus effect of releasing of anaerobic zone 8, its former water ratio that enters into pre-oxygen-starved area 7 and anaerobic zone 8 is 1: 4.Anaerobic zone 8 polyP bacterias absorb the organism in the former water, and are stored in its organism with the form of PHAs, discharge a large amount of phosphorus simultaneously.
(b) mixed solution of anaerobic zone 8 enters A
2The oxygen-starved area 9 of O reactor 2, what enter oxygen-starved area 9 simultaneously also has from A
2The nitrification liquid of O reactor 2 aerobic zones 10 ends, what finish in this stage is that denitrification and anoxic are inhaled the phosphorus effect.
(c) mixed solution of oxygen-starved area 9 enters A subsequently
2The aerobic zone 10 of O reactor 2, the main effect in this stage is a nitrification, and further absorbs oxygen-starved area 9 and do not suck remaining phosphorus, removes the organism of 2-5% simultaneously.
(d) from A
2The mixed solution that the O reactor is 2 sections enters second pond 3, realizes the mud-water separation of mixed solution, and supernatant liquor flow into out water tank 4, finally by going out water tank 4 dischargings.
Raw water tubes, water tank inlet, pump, A
2O reactor, second pond, rising pipe are connected in proper order:
Pre-oxygen-starved area, anaerobic zone and oxygen-starved area are built-in with whipping appts;
Between second pond bottom and pre-anoxic pond, be communicated with mud return line;
A
2Be communicated with the nitrification liquid return line between the Aerobic Pond of O and the anoxic pond;
The nitrification liquid control of reflux ratio is 200%, and return sludge ratio is 50%-100%, A
2The aerobic zone dissolved oxygen of O remains on 3mg/L, sludge age 15d, hydraulic detention time 8h.
This suspension aerobic biologic membrane by-pass flow A
2O advanced nitrogen dephosphorization apparatus is by the 1-water tank inlet; 2-A
2The O reactor; The 3-second pond; 4-goes out water tank; The 5-peristaltic pump; The 6-filler.
Idiographic flow of the present invention is: the aerobic biologic membrane by-pass flow A that handles low C/N municipal effluent
2The device of O technology, the returned sluge of partial raw water and second pond enters A together
2The pre-oxygen-starved area of O technology, denitrifying bacteria is removed the nitric nitrogen in the returned sluge by denitrification; The parallel connection simultaneously of former water enters A
2The O anaerobic zone, the organism that absorbs a large amount of easy degradeds at the anaerobic zone polyP bacteria is stored in vivo with the form of PHAs, and discharges a large amount of phosphorus; Mixed solution and enter A together from the nitrification liquid of aerobic end
2The oxygen-starved area of O reactor, 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
2What the aerobic zone of O reactor mainly carried out is nitrification.
The present invention can be widely used in big-and-middle cities and towns municipal sewage treatment, is specially adapted to adopt A
2The sewage work of O technology.At first filler is placed A
2O technology aerobic zone has formed microbial film through one month on the filler, determines 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 volume of each section, return sludge ratio, nitrification liquid 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 3.8 for pH=6.4-7.5, COD=235-343mg/L).A
2The O reactor is made of 9 lattice chambers, and total useful volume is 30.5L, and first lattice chamber is pre-oxygen-starved area, subsequently 2 is anaerobic zone, the anaerobic zone back is 2 oxygen-starved areas, and remaining 4 is aerobic zone, and the volumetric ratio of promptly pre-oxygen-starved area, anaerobic zone, oxygen-starved area and aerobic zone is 1: 2: 2: 4.The treatment scheme of sewage: enter into pre-oxygen-starved area together from the returned sluge of the part of contaminated water of water tank inlet and second pond and finish the removal of returned sluge nitric nitrogen at this; Enter anaerobic zone from the most sewage of the mixed solution of pre-oxygen-starved area, what mainly carry out at anaerobic zone is the phosphorus effect of releasing of polyP bacteria; The nitrification liquid of mixed solution and aerobic zone backflow subsequently enters into the oxygen-starved area simultaneously and finishes denitrification denitrogenation and dephosphorization function; Mixed solution enters the nitrification that aerobic zone is finished nitrobacteria by the oxygen-starved area subsequently; Mixed solution is finally from A
2The O reactor enters into second pond, finishes mud-water separation in second pond, and supernatant liquor flow into out water tank and discharges.A in the process of the test
215.2 ℃ of the water inlet medial temperatures of O, flooding quantity is 3.8L/h, and DO is controlled at 3mg/L, and corresponding HRT is 8h, and MLSS is about about 4000mg/L, and SRT is 15d, and nitrification liquid refluxes 200%, and mud refluxes 100%.Less than 15mg/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 (3)
1. handle the aerobic biologic membrane by-pass flow A that hangs down the C/N municipal effluent for one kind
2The O process unit comprises the water tank inlet (1), the A that are linked in sequence
2O reactor (2), second pond (3), go out water tank (4), peristaltic pump (5) and biofilm packing (6) constitutes, it is characterized in that A
2O reactor (2) is divided into pre-oxygen-starved area (7), anaerobic zone (8), oxygen-starved area (9) and aerobic zone (10), and pre-oxygen-starved area (7), anaerobic zone (8) and oxygen-starved area (9) are respectively equipped with whipping appts, at the bottom and the A of second pond (3)
2O reactor (2) is communicated with mud return line, A between the pre-oxygen-starved area
2Be communicated with the nitrification liquid return line between the aerobic zone (10) of O reactor (2) and oxygen-starved area (9).
2. utilize the described device of claim 1 to handle the aerobic biologic membrane by-pass flow A of low C/N municipal effluent
2The O processing method is characterized in that, this sewage water treatment method has following step:
(a) former water pumps into A through peristaltic pump (5) respectively in two separate ranks from water tank inlet (1)
2The pre-oxygen-starved area (7) of O reactor (2) and anaerobic zone (8), enter into the returned sluge of also having of pre-oxygen-starved area (7) simultaneously from second pond (3), its former water ratio that enters into pre-oxygen-starved area (7) and anaerobic zone (8) is 1: 4, anaerobic zone (8) polyP bacteria absorbs the organism in the former water, and be stored in its organism with the form of PHAs, discharge a large amount of phosphorus simultaneously;
(b) mixed solution of anaerobic zone (8) enters A
2The oxygen-starved area (9) of O reactor (2), what enter oxygen-starved area (9) simultaneously also has from A
2The nitrification liquid that O reactor (2) aerobic zone (10) is terminal;
(c) mixed solution of oxygen-starved area enters A subsequently
2The aerobic zone (10) of O reactor (2) carries out nitration reaction, and further absorbs oxygen-starved area (9) and do not suck remaining phosphorus, removes the organism of 2-5% simultaneously;
(d) from A
2The mixed solution of O reactor (2) section enters second pond (3), realizes the mud-water separation of mixed solution, and supernatant liquor flow into out water tank (4), finally by going out water tank (4) discharging.
3. the aerobic biologic membrane by-pass flow A of the low C/N municipal effluent of processing according to claim 2
2The O processing method is characterized in that, wherein step (b) nitrification liquid control of reflux ratio is 200%, and the return sludge ratio of step (a) is 50%-100%, A
2The aerobic zone of O technology (10) dissolved oxygen remains on 3mg/L, sludge age 15d, hydraulic detention time 8h.
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| CN 201010597286 CN102086062A (en) | 2010-12-21 | 2010-12-21 | Device and method for processing aerobic biofilm bypass flow A2O (Anaeroxic-Anoxic-Oxic) process of low C/N (Carbon-Nitrogen) urban sewage |
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| CN 201010597286 CN102086062A (en) | 2010-12-21 | 2010-12-21 | Device and method for processing aerobic biofilm bypass flow A2O (Anaeroxic-Anoxic-Oxic) process of low C/N (Carbon-Nitrogen) urban sewage |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105461061A (en) * | 2015-12-31 | 2016-04-06 | 华南理工大学 | A<2>/O-biology synchronous nitrogen and phosphorus removal device and method for urban sewage |
| CN106064865A (en) * | 2016-05-31 | 2016-11-02 | 安徽黄河水处理科技股份有限公司 | Multifrequency sound energy generator, ultra micro acoustic energy integrated effluent disposal system and processing method |
| CN106145355A (en) * | 2016-08-31 | 2016-11-23 | 华仪环保有限公司 | A kind of nitrification liquid mud reflux respectively |
| CN106587544A (en) * | 2017-02-09 | 2017-04-26 | 山东建筑大学 | Enhanced phosphate removal and sludge reduction type sewage treatment apparatus |
| CN107364969A (en) * | 2017-08-16 | 2017-11-21 | 贵州博凡环境科技有限公司 | The energy-saving sewage processing method and its device of a kind of high-efficient denitrification and dephosphorization |
| CN108423826A (en) * | 2018-04-11 | 2018-08-21 | 中国环境科学研究院 | A kind of improvement A2O and sulphur autotrophy combined denitrification dephosphorizing reactor and sewage water treatment method |
| CN108623004A (en) * | 2018-07-09 | 2018-10-09 | 北京恩菲环保技术有限公司 | Ozone comprehensively utilizes sewage disposal system and method |
| CN109748450A (en) * | 2017-11-06 | 2019-05-14 | 天津万品科技有限公司 | A kind of integrated sewage disposal small testing device and process |
| CN114105301A (en) * | 2021-12-06 | 2022-03-01 | 北京工业大学 | Device and method for realizing efficient denitrification of low C/N sewage by enhancing endogenous denitrification through anoxic MBR (membrane bioreactor) |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105461061A (en) * | 2015-12-31 | 2016-04-06 | 华南理工大学 | A<2>/O-biology synchronous nitrogen and phosphorus removal device and method for urban sewage |
| CN106064865A (en) * | 2016-05-31 | 2016-11-02 | 安徽黄河水处理科技股份有限公司 | Multifrequency sound energy generator, ultra micro acoustic energy integrated effluent disposal system and processing method |
| CN106145355A (en) * | 2016-08-31 | 2016-11-23 | 华仪环保有限公司 | A kind of nitrification liquid mud reflux respectively |
| CN106587544A (en) * | 2017-02-09 | 2017-04-26 | 山东建筑大学 | Enhanced phosphate removal and sludge reduction type sewage treatment apparatus |
| CN106587544B (en) * | 2017-02-09 | 2023-03-14 | 山东建筑大学 | Enhanced phosphorus removal and sludge reduction type sewage treatment device |
| CN107364969A (en) * | 2017-08-16 | 2017-11-21 | 贵州博凡环境科技有限公司 | The energy-saving sewage processing method and its device of a kind of high-efficient denitrification and dephosphorization |
| CN109748450A (en) * | 2017-11-06 | 2019-05-14 | 天津万品科技有限公司 | A kind of integrated sewage disposal small testing device and process |
| CN108423826A (en) * | 2018-04-11 | 2018-08-21 | 中国环境科学研究院 | A kind of improvement A2O and sulphur autotrophy combined denitrification dephosphorizing reactor and sewage water treatment method |
| CN108423826B (en) * | 2018-04-11 | 2020-10-09 | 中国环境科学研究院 | Improvement A2O and sulfur autotrophic combined nitrogen and phosphorus removal reactor and sewage treatment method |
| CN108623004A (en) * | 2018-07-09 | 2018-10-09 | 北京恩菲环保技术有限公司 | Ozone comprehensively utilizes sewage disposal system and method |
| CN114105301A (en) * | 2021-12-06 | 2022-03-01 | 北京工业大学 | Device and method for realizing efficient denitrification of low C/N sewage by enhancing endogenous denitrification through anoxic MBR (membrane bioreactor) |
| CN114105301B (en) * | 2021-12-06 | 2024-03-29 | 北京工业大学 | Device and method for realizing high-efficiency denitrification of low-C/N sewage by strengthening endogenous denitrification through anoxic MBR (Membrane biological reactor) |
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Application publication date: 20110608 |