CN201737811U - A2/O-BAF technique deep denitrification and dephosphorization real-time control device - Google Patents
A2/O-BAF technique deep denitrification and dephosphorization real-time control device Download PDFInfo
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- CN201737811U CN201737811U CN2010202498377U CN201020249837U CN201737811U CN 201737811 U CN201737811 U CN 201737811U CN 2010202498377 U CN2010202498377 U CN 2010202498377U CN 201020249837 U CN201020249837 U CN 201020249837U CN 201737811 U CN201737811 U CN 201737811U
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Abstract
The utility model discloses an A2/O-BAF technique deep denitrification and dephosphorization real-time control device mainly comprising a raw water tank (1), an A2/O reactor (2), a secondary settling tank (3), a BAF reactor (4) and a real-time control system (5). The control device overcomes the limitation of the traditional sewage biological denitrification and dephosphorization technique, is one of the most effective methods for conducting synchronous denitrification and dephosphorization when treating low C/N sewage, and is simple in structure, high in degree of automation, convenient in management and maintenance and low in labour intensity.
Description
Technical field
A
2/ O-BAF technology advanced nitrogen dephosphorization real-time control apparatus belongs to the activated sludge process sewage biological treatment system.
Background technology
The excessive emissions of nutritive elements such as nitrogen phosphorus is the major reason that causes water body " eutrophication ", and it has constituted serious threat for industrial and agricultural production and people's lives.A
2/ O has series of advantages such as simple structure, HRT weak point, design and operation experience maturation, the little and difficult generation sludge bulking of control complicacy as the simplest synchronous denitrogen dephosphorus technology, is the main process of China's town sewage plant.Yet, A
2Nitrifier among the/O, denitrifying bacteria and the polyP bacteria contradiction on organic loading, mud age and carbon source demand is difficult to obtain simultaneously in the single biochemical system good result of denitrogenation dephosphorizing, hampers the biological carbon and phosphorous removal The Application of Technology.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.But BAF exists the work period short, back flushing frequency height, blockage phenomenon easily.In addition, the natural C/N that exists is low for China's town sewage, how to improve the treatment effect of low C/N water quality, is the great and thorny difficult problem of pendulum in face of the water treatment worker.
A
2/ O-BAF technology collection A
2/ O and BAF advantage have successfully solved the competitive contradiction of polyP bacteria, denitrifying bacteria and nitrifier in the traditional biological denitrification dephosphorization technique in one, by shortening mud age, with nitrifying process from A
2Separate among/the O, it is nitrated to allow BAF realize; A
2/ O moves under short mud condition in age, brings into play the effective advantage of its dephosphorization and denitrification; BAF moves under long mud condition in age, does not only influence the phosphor-removing effect of system, helps the stable and efficient of nitrification effect all the better.A
2The Prepositive denitrification of/O-BAF technology structure provides enabling environment to growth and the enrichment of denitrification phosphorus-collecting bacterium (DPAOs); Simultaneously, A
2/ O-BAF technology is moved under low C/N condition of water quality, help DPAOs and become dominant bacteria, DPAOs is electron acceptor(EA) with the nitrate nitrogen, with PHAs is electron donor, when finishing denitrification denitrogenation, also realized dephosphorization, realized " carbon is dual-purpose ", alleviated the technical barrier that carbon source lacks in the municipal sewage treatment to greatest extent, also can save 30% aeration rate simultaneously, reduce by 50% sludge yield, make water quality treatment stably reach " urban wastewater treatment firm pollutant emission standard " one-level A standard (GB18918-2002).
Summary of the invention
The purpose of this utility model provides a kind of real-time control apparatus of advanced nitrogen dephosphorization.At the limitation of traditional wastewater biological denitrification phosphorous removal technique, A
2/ O-BAF technology collection A
2The advantage of/O and BAF is in one, A
2The major function of/O is dephosphorization and denitrification denitrogenation; The major function of BAF is to finish nitratedly, and BAF also is A
2The oxygen-starved area of/O provides competent electron acceptor(EA), and is favourable to denitrification dephosphorization, and denitrification dephosphorization is considered to one of most effectual way of handling low C/N sewage synchronous denitrification dephosphorizing.
Mechanism of the present utility model is: sewage and returned sluge at first enter A
2The anaerobic zone of/O, polyP bacteria utilize the synthetic internal carbon source PHAs of the voltaile fatty acid (VFAs) in the former water and are stored in the body, discharge a large amount of phosphorus simultaneously; Mixed solution enters the oxygen-starved area, and what enter simultaneously also has nitrification liquid from BAF, and denitrifying bacteria is electron acceptor(EA) with the nitrate nitrogen, with degradable COD is electron acceptor(EA), denitrification denitrogenation, DPAOs are electron acceptor(EA) with the nitrate nitrogen, are the electron donor denitrification dephosphorization with PHAs; Mixed solution enters aerobic zone, and the major function of aerobic zone is to remove remaining phosphorus and a spot of COD; Mixed solution enters second pond and carries out mud-water separation, and the supernatant liquor that is rich in ammonia nitrogen enters BAF, and under the effect of nitrifier, ammonia nitrogen is oxidized to nitrate nitrogen, and the part of BAF water outlet is back to the oxygen-starved area, another part discharging.
A
2/ O-BAF advanced nitrogen dephosphorization real-time control apparatus is mainly by former water tank (1), A
2/ O reactor (2), second pond (3), BAF reactor (4) and real-time control system (5) constitute, it is characterized in that, former water tank (1) is connected with anaerobic zone (7) through peristaltic pump (6), anaerobic zone (7) is connected with oxygen-starved area (8), oxygen-starved area (8) is connected with aerobic zone (9), aerobic zone (9) is connected with second pond (3), second pond (3) is connected with BAF (4) by high-pressure pump (10), BAF (4) is connected with oxygen-starved area (8) by peristaltic pump (20), second pond (3) bottom sludge outlet end is connected with anaerobic zone (7) through peristaltic pump (19), excess sludge discharges from mud discharging mouth (23), real-time control system (5) is by computer (24), process controller (25), variable-frequence governor (21), (22) constitute, BAF (4) is connected with water tank (11), DO transmitter (12) is installed in the water tank (11), ammonia nitrogen sensor (13), nitric nitrogen transmitter (14) and total phosphorus TP transmitter (15), described transmitter is connected with computer (24), computer (24) is connected with controller (25), process controller (25) and variable-frequence governor (21), (22) connect; Variable-frequence governor (21) is connected with air pump (18), and variable-frequence governor (22) is connected with peristaltic pump (20).
Utilize the utility model A
2/ O-BAF advanced nitrogen dephosphorization apparatus carries out real-time control method, may further comprise the steps:
1) former water enters anaerobic zone (7) by former water tank (1) by peristaltic pump (6), and what enter synchronously also has returned sluge from second pond (3).
2) mixed solution enters oxygen-starved area (8) from anaerobic zone (7), and what enter simultaneously also has nitrification liquid from BAF (4).
3) (8) enter second pond (3) through aerobic zone (9) and carry out mud-water separation mixed solution from the oxygen-starved area, and the supernatant liquor that is rich in ammonia nitrogen enters BAF (4) through high-pressure pump (10), and returned sluge is back to anaerobic zone (7) through peristaltic pump (19).
4) ammonia nitrogen concentration in ammonia nitrogen sensor (13) the online acquisition water tank (11), the computing by computer (24) obtains real time control variables, through process controller (25) control of conversion speed regulator (21), adjusts the aeration rate of air pump (18); As ammonia nitrogen concentration 〉=1mgL
-1The time, the increasing aeration rate is 0.8～1.0m
3H
-1, as ammonia nitrogen concentration≤0.1mgL
-1The time, the minimizing aeration rate is 0.5～0.8m
3H
-1Also can be by DO transmitter (12), as DO 〉=6mgL
-1The time, the minimizing aeration rate is 0.5～0.8m
3H
-1As DO≤4mgL
-1The time, the increase aeration rate is 0.8～1.0m
3H
-1DO transmitter (12) and ammonia nitrogen sensor (13) can be separately as controlled variable.
5) the nitric nitrogen concentration in nitric nitrogen transmitter (13) the online acquisition water tank (11), computing by computer (24) obtains real time control variables, through process controller (25) control of conversion speed regulator (22), adjust the reflux ratio of peristaltic pump (20), as nitric nitrogen concentration 〉=13mgL
-1The time, strengthening reflux ratio is 300%～400%, as nitric nitrogen concentration≤6.0mgL
-1The time, reduce reflux ratio 100%～200%.
6) the TP concentration in TP transmitter (15) the online acquisition water tank (11), computing by computer (24) obtains real time control variables, through the variable-frequence governor (22) of process controller (25) control, adjust the reflux ratio of peristaltic pump (20), as TP concentration 〉=1.0mgL
-1The time, strengthening reflux ratio is 200%～400%, as TP concentration≤0.1mgL
-1The time, reducing reflux ratio is 100%～200%.
The utility model A
2/ O-BAF technology advanced nitrogen dephosphorization real-time control apparatus is compared with existing advanced nitrogen dephosphorization technique, has following advantage:
1) polyP bacteria of lacking mud age and denitrifying bacteria have been realized separating with the nitrifier in long mud age, have solved their competitive contradiction, grow in each comfortable best environment that makes them, help the stable of system.
2) Prepositive denitrification of technology is configured to denitrification dephosphorization condition is provided, and has solved the technical difficult problem that carbon source lacks in the low C/N sewage treatment process, saves the dosage of outer carbon source to greatest extent, under the prerequisite that guarantees water quality treatment, has reduced running cost.
3) because A
2There is not nitrifier among the/O, under perfect condition, do not contain nitrate nitrogen in the returned sluge, fully release phosphorus for polyP bacteria absolute anaerobic environment is provided.
4) BAF is at A
2After/the O, COD in the sewage and SS obtain removing, and help the growth of nitrifier, have prolonged the backwashing period of BAF simultaneously.
5) A
2The aerobic zone HRT of/O is short, has reduced aeration rate, has reduced energy consumption.
6) ammonia nitrogen concentration in the ammonia nitrogen sensor on-line monitoring water tank guaranteeing to adjust aeration rate in real time under the water outlet ammonia nitrogen prerequisite up to standard, has reduced aeration energy consumption; Simultaneously also can adjust aeration rate in real time, further optimize real-time control strategy by DO concentration in the DO sensor online water tank.
7) nitric nitrogen concentration in the nitric nitrogen transmitter online acquisition water tank guaranteeing that water outlet TN satisfies under the prerequisite of emission standard, is adjusted the nitrification liquid reflux ratio in real time, and the energy avoids waste.
8) TP concentration in the TP transmitter online acquisition water tank satisfies under the condition of emission standard in water outlet TP concentration, controls the nitrification liquid reflux ratio in real time, has reduced energy consumption.
9) real-time control system is simple in structure, the level of automation height, and management maintenance is convenient, and labour intensity is low.
Description of drawings
Figure 1A
2/ O-BAF advanced nitrogen dephosphorization apparatus and real-time control method synoptic diagram
Among Fig. 1, the former water tank of 1-; 2-A
2/ O reactor; The 3-second pond; The 4-BAF reactor; The 5-real-time control system; The 6-peristaltic pump; The 7-anaerobic zone; The 8-oxygen-starved area; The 9-aerobic zone; The 10-high-pressure pump; The 11-water tank; The 12-DO transmitter; The 13-ammonia nitrogen sensor; 14-nitric nitrogen transmitter; The 15-TP transmitter; The 16-gas meter; The 17-gas meter; The 18-air pump; The 19-peristaltic pump; The 20-peristaltic pump; The 21-variable-frequence governor; The 22-variable-frequence governor; 23-excess sludge discharge mouth; The 24-computer; The 25-process controller.
Embodiment
In conjunction with Fig. 1, describe working procedure of the present utility model: A in detail
2/ O-BAF advanced nitrogen dephosphorization apparatus and real-time control system are mainly by former water tank (1), A
2/ O reactor (2), second pond (3), BAF reactor (4) and real-time control system (5) constitute.
1.A
2/ O-BAF advanced nitrogen dephosphorization apparatus
1) former water tank (1) is connected with anaerobic zone (7) through peristaltic pump (6), and anaerobic zone (7) is connected with oxygen-starved area (8), and oxygen-starved area (8) are connected with aerobic zone (9), and aerobic zone (9) is connected with second pond (3).
2) second pond (3) is connected with BAF (4) by high-pressure pump (10), and BAF (4) is connected with oxygen-starved area (8) by peristaltic pump (20).
3) second pond (3) is connected with anaerobic zone (7) through peristaltic pump (19), and excess sludge discharges from mud discharging mouth (23).
4) BAF (4) is connected with water tank (11), DO transmitter (12), ammonia nitrogen sensor (13), nitric nitrogen transmitter (14) and total phosphorus TP transmitter (15) are installed in the water tank (11), described transmitter is connected with computer (24) by real-time control system (5), and computer (24) is connected with controller (25).
5) real-time control system (5) is made of computer (24), process controller (25), variable-frequence governor (21), (22), and computer (24) is connected with process controller (25), and process controller (25) is connected with variable-frequence governor (21), (22); Variable-frequence governor (21) is connected with air pump (18), and variable-frequence governor (22) is connected with peristaltic pump (20).
2.A
2/ O-BAF advanced nitrogen dephosphorization apparatus real-time control method
(1) former water enters anaerobic zone (7) by former water tank (1) through peristaltic pump (6), and what enter synchronously also has returned sluge from second pond (3).
(2) mixed solution enters oxygen-starved area (8) from anaerobic zone (7), and what enter simultaneously also has nitrification liquid from BAF (4).
(3) (8) enter second pond (3) through aerobic zone (9) to mixed solution from the oxygen-starved area, and the supernatant liquor that is rich in ammonia nitrogen enters BAF (4) through high-pressure pump (10), and the water outlet of BAF (4) enters water tank (11).
(4) DO transmitter (12), ammonia nitrogen sensor (13), nitric nitrogen transmitter (14) and total phosphorus TP transmitter (15) are installed in the water tank (11), described transmitter is connected with real-time control system (5).
(5) real-time control system (5) is made of computer (24), process controller (25), variable-frequence governor (21), (22); Variable-frequence governor (21) is connected with air pump (18), and variable-frequence governor (22) is connected with peristaltic pump (20).
(6) ammonia nitrogen concentration in ammonia nitrogen sensor (13) the online acquisition water tank (11), the computing by computer (24) obtains real time control variables, through process controller (25) control of conversion speed regulator (21), adjusts the aeration rate of air pump (18).As ammonia nitrogen concentration 〉=1mgL
-1The time, the increasing aeration rate is 0.8～1.0m
3H
-1, as ammonia nitrogen concentration≤0.1mgL
-1The time, the minimizing aeration rate is 0.5～0.8m
3H
-1Also can be by DO transmitter (12), as DO 〉=6mgL
-1The time, the minimizing aeration rate is 0.5～0.8m
3H
-1As DO≤4mgL
-1The time, the increase aeration rate is 0.8～1.0m
3H
-1DO transmitter (12) and ammonia nitrogen sensor (13) can be separately as controlled variable.
(7) the nitric nitrogen concentration in nitric nitrogen transmitter (13) the online acquisition water tank (11) by the fortune of computer (24), is calculated, obtain real time control variables, through process controller (25) control of conversion speed regulator (22), adjust the reflux ratio of peristaltic pump (20), as nitric nitrogen concentration 〉=13mgL
-1The time, strengthening reflux ratio is 300%～400%, as nitric nitrogen concentration≤6.0mgL
-1The time, reduce reflux ratio 200%～300%.
(8) the TP concentration in TP transmitter (15) the online acquisition water tank (11), computing by computer (24) obtains real time control variables, through the variable-frequence governor (22) of process controller (25) control, adjust the reflux ratio of peristaltic pump (20), as TP concentration 〉=1.0mgL
-1The time, strengthening reflux ratio is 200%～300%, as TP concentration≤0.1mgL
-1The time, reducing reflux ratio is 100%～200%.With Beijing university teaching and administrative staff residential quarters septic tank sanitary sewage is former water, water quality characteristics table 1
Table 1 influent quality characteristics
Test conditions is: A
2The flooding velocity of/O reactor is 96Ld
-1, HRT is 7.5h (wherein anaerobic zone 0.8h, oxygen-starved area 5.0h, aerobic zone 1.7h), and SRT is controlled at 15d, and MLSS is 4.0gL
-1, BAF DO maintains 4～6mgL
-1, HRT is 0.5h.
In the nitrification liquid reflux ratio is 300% o'clock, NH in the water outlet
4 +-N, NO
3 -Technical indicators such as-N, TN and TP are respectively 0.2,9.0,9.6 and 0.1mgL
-1, be 400% o'clock in the nitrification liquid reflux ratio, NH in the water outlet
4 +-N, NO
3 -Technical indicators such as-N, TN and TP are respectively 0.9,8.2,8.7 and 0.1mgL
-1, above effluent index all reaches country-level A standard.
Claims (1)
1.A
2/ O-BAF advanced nitrogen dephosphorization real-time control apparatus is mainly by former water tank (1), A
2/ O reactor (2), second pond (3), BAF reactor (4) and real-time control system (5) constitute, it is characterized in that, former water tank (1) is connected with anaerobic zone (7) through peristaltic pump (6), anaerobic zone (7) is connected with oxygen-starved area (8), oxygen-starved area (8) is connected with aerobic zone (9), aerobic zone (9) is connected with second pond (3), second pond (3) is connected with BAF (4) by high-pressure pump (10), BAF (4) is connected with oxygen-starved area (8) by peristaltic pump (20), second pond (3) bottom sludge outlet end is connected with anaerobic zone (7) through peristaltic pump (19), excess sludge discharges from mud discharging mouth (23), real-time control system (5) is by computer (24), process controller (25), variable-frequence governor (21), (22) constitute, BAF (4) is connected with water tank (11), DO transmitter (12) is installed in the water tank (11), ammonia nitrogen sensor (13), nitric nitrogen transmitter (14) and total phosphorus TP transmitter (15), described transmitter is connected with computer (24), computer (24) is connected with controller (25), process controller (25) and variable-frequence governor (21), (22) connect; Variable-frequence governor (21) is connected with air pump (18), and variable-frequence governor (22) is connected with peristaltic pump (20).
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|---|---|---|---|
| CN2010202498377U CN201737811U (en) | 2010-06-25 | 2010-06-25 | A2/O-BAF technique deep denitrification and dephosphorization real-time control device |
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| CN2010202498377U CN201737811U (en) | 2010-06-25 | 2010-06-25 | A2/O-BAF technique deep denitrification and dephosphorization real-time control device |
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| CN201737811U true CN201737811U (en) | 2011-02-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105731630A (en) * | 2014-12-25 | 2016-07-06 | 川崎重工业株式会社 | Water Treatment System And Method For Controlling Aeration Air Quantity Thereof |
| CN109052638A (en) * | 2018-08-31 | 2018-12-21 | 浦华控股有限公司 | The automatic regulating system of sludge solid-liquid separator and biochemical reaction tank oxygen demand |
-
2010
- 2010-06-25 CN CN2010202498377U patent/CN201737811U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105731630A (en) * | 2014-12-25 | 2016-07-06 | 川崎重工业株式会社 | Water Treatment System And Method For Controlling Aeration Air Quantity Thereof |
| CN105731630B (en) * | 2014-12-25 | 2019-08-30 | 川崎重工业株式会社 | The aeration air quantity control method of water treatment system and the system |
| CN109052638A (en) * | 2018-08-31 | 2018-12-21 | 浦华控股有限公司 | The automatic regulating system of sludge solid-liquid separator and biochemical reaction tank oxygen demand |
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180420 Address after: 150090 room 1003, Huahong International Center, No. 75, Minjiang Road, Nangang District, Harbin, Heilongjiang Patentee after: Heilongjiang bishuiyuan Environmental Engineering Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology Effective date of registration: 20180420 Address after: 150090 room 1003, Huahong International Center, No. 75, Minjiang Road, Nangang District, Harbin, Heilongjiang Patentee after: Heilongjiang bishuiyuan Environmental Engineering Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology |
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Granted publication date: 20110209 |
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