CN108862585B - Device and method for starting and stably maintaining shortcut nitrification of municipal sewage - Google Patents
Device and method for starting and stably maintaining shortcut nitrification of municipal sewage Download PDFInfo
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- CN108862585B CN108862585B CN201810739334.9A CN201810739334A CN108862585B CN 108862585 B CN108862585 B CN 108862585B CN 201810739334 A CN201810739334 A CN 201810739334A CN 108862585 B CN108862585 B CN 108862585B
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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
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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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
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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
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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Abstract
A device and a method for starting and stably maintaining shortcut nitrification of municipal sewage belong to the field of municipal domestic sewage treatment. The device mainly comprises a raw water tank, a short-cut nitrification device for urban sewage, a whole-course nitrification device, a sludge treatment device and a sludge reflux device. The method is characterized in that after the activated sludge is treated at high temperature, the difference of AOB and NOB recovery rates is utilized to start short-cut nitrification, and the short-cut nitrification operation stability is improved by combining a sludge treatment device, so that the short-cut nitrification of the municipal sewage is started and stably operated. The device has the advantages of simple operation, high automatic control degree, short-cut nitrification, aeration quantity saving, low sludge yield and treatment cost reduction.
Description
Technical Field
The invention relates to a device and a method for starting and stably maintaining short-cut nitrification of municipal sewage, which belong to the field of biological treatment of municipal sewage and are suitable for denitrification treatment of the municipal sewage with low carbon ratio;
background
In recent years, the eutrophication problem of water bodies in China frequently occurs because nitrogen and phosphorus elements in the water bodies exceed standards, so that the treatment requirements of urban sewage treatment plants on nitrogen and phosphorus are higher and higher; compared with phosphorus removal, the nitrogen removal problem is more urgent, and the denitrification process is also urgently to be improved;
the short-cut nitrification and denitrification and short-cut nitrification anaerobic ammonia oxidation denitrification process which is started in recent years has a plurality of advantages, such as: the aeration quantity and the reaction time are saved, the carbon source required by denitrification is saved, the sludge yield is reduced, the treatment cost is saved, but a stable and effective short-cut nitrification quick start and stable operation method is lacked;
at present, methods for realizing short-cut nitrification mainly comprise high-concentration Free Ammonia (FA) and high-concentration Free Nitrite (FNA), low Dissolved Oxygen (DO), short sludge age (SRT) combined aeration time control, lack aerobic intermittent aeration means, addition of inhibitors and the like, although the methods can realize short-cut nitrification, the starting time is longer, short-cut operation is difficult to stably maintain, and once an over-aeration phenomenon occurs, the short cut is destroyed;
according to the invention, the activities of Ammonia Oxidizing Bacteria (AOB) and Nitrite Oxidizing Bacteria (NOB) are reduced through high-temperature inhibition, then the AOB activity is recovered faster than the NOB during recovery, the rapid start of short-cut nitrification is realized, and the long-term stable operation of the short-cut nitrification is strengthened and maintained by using a side sludge inhibition and recovery device;
disclosure of Invention
The invention aims to provide a method for starting and stably maintaining urban sewage shortcut nitrification, which utilizes high temperature to pretreat activated sludge, simultaneously reduces the activity of AOB and NOB, but in a recovery period, the recovery rate of the activity of AOB is faster than that of NOB, so that the oxidation rate of ammonia is higher than that of nitrite, and then when a reactor runs, a side high-temperature inhibition and recovery device is used for starting and stably maintaining the urban sewage shortcut nitrification.
A device and a method for starting and stably maintaining short-cut nitrification of municipal sewage are characterized in that: the system consists of an urban sewage raw water tank (1), an urban sewage short-cut nitrification device, a whole-course nitrification device, a sludge treatment device and a sludge reflux device;
the short-cut urban sewage nitrification device comprises a third aeration pump (28), a third flow meter (29), a third aeration head (31), a third stirrer (32), a third pH probe (33), a third DO probe (34), a third water quality analyzer (35), a third sampling valve (36), a third drain valve (39), a third drain pump (40) and the like;
the urban sewage full-process nitrification device comprises a first aeration pump (7), a first flowmeter (6), a first aeration head (5), a first stirrer (8), a first pH probe (9), a first DO probe (10), a first water quality analyzer (12), a first sampling valve (11), a first drainage valve (13), a first drainage pump (14) and the like;
the sludge treatment device comprises a second aeration pump (20), a second flowmeter (19), a second aeration head (18), a second stirrer (21), a second pH probe (22), a second DO probe (23), a second water quality analyzer (24), a second sampling valve (25), a second drain valve (44), a second drain pump (43) and the like;
the sludge reflux device consists of a reflux valve and a reflux pump;
the urban sewage short-cut nitrification device, the urban sewage whole-course nitrification device and the sludge treatment device are connected through three sets of sludge reflux devices.
The short-cut nitrification device for the municipal sewage firstly carries out preposed anoxic denitrification and then carries out short-cut nitrification to realize the removal of nitrogen, and after the reaction is finished, precipitation and drainage are carried out;
the device mainly provides activated sludge for the sludge treatment device and has a certain denitrification effect;
the sludge treatment device carries out high-temperature inhibition and recovery treatment after the full-course nitrified activated sludge enters, so that the full-course activated sludge is converted into short-course nitrified sludge to start and maintain the short-course nitrification of the municipal sewage;
the invention provides a device and a method for starting and stably maintaining shortcut nitrification of municipal sewage, which comprises the following steps:
sewage in an urban sewage raw water tank (1) enters a short-range nitrification device (30) through a third water inlet pump (37) and a third water inlet valve (38), and after water inlet, the single-period operation mode is as follows, water inlet is carried out for 20min, anoxic stirring is carried out for 90min, aeration is carried out for 120min, sedimentation is carried out for 30min, water drainage is carried out for 20min, the operation is carried out for 200min, 3 periods/day, the temperature is room temperature during the operation period, DO is greater than 3mg/L, the pH changes (6.8-7.5) along with the water quality of the inlet water, and the sludge concentration is maintained at 3500 +/-200 mg;
sewage in an urban sewage raw water tank (1) enters a full-course nitrification device (4) through a first water inlet pump (2) and a first water inlet valve (3), and after water enters, a single-period operation mode is as follows, water enters for 20min, anoxic stirring is carried out for 90min, aeration is carried out for 120min, sedimentation is carried out for 30min, water is drained for 20min, the operation is carried out for 200min, 3 periods/day, the temperature is room temperature during the operation period, DO is greater than 3mg/L, the pH changes (6.8-7.5) along with the quality of the water, and the sludge concentration is maintained at 4000 +/-200 mg/L;
the sludge treatment device mainly inhibits and recovers the activated sludge, and has the specific operation that after a sludge-water mixture with 50 percent of nitrification in the whole process enters the sludge treatment device through a first sludge pump (15) and a first sludge valve (16), the activated sludge is inhibited for 30min at a high temperature of more than 50 ℃, then enters the urban sewage through a second water inlet pump (45) and a second water inlet valve (46), starts aeration recovery, continuously aerates for 10 days, monitors a pH curve according to a water quality analyzer (24), when the inflection point of the pH curve is the ammonia valley point, the aeration is stopped, the urban sewage is fed again for aeration recovery, after 10 days, 50 percent of sludge-water mixture in the reactor enters the urban sewage short-cut nitrification device (30) through a second sludge pump (27) and a second sludge valve (26), meanwhile, the urban sewage short-cut nitrification device (30) returns 50 percent of sludge-water mixture to the urban sewage full-cut nitrification device (4) through a third sludge pump (41) and a third sludge valve (42);
and (5) finishing the single-period operation, and repeating the steps for operation.
The technical principle of the method of the invention is as follows: part of NOB can be killed by high-temperature treatment without affecting AOB, the activities of the treated AOB and NOB can be momentarily inhibited, but in a recovery period, the activity of the AOB is recovered faster than that of the NOB, so that the short-cut nitrification can be quickly started, and then a side high-temperature treatment device is utilized to continuously strengthen the short-cut nitrification process, so that the long-term short-cut nitrification can be maintained;
compared with the prior art, the device and the method for starting and stably maintaining the short-cut nitrification of the municipal sewage have the following advantages that:
the short-cut nitrification starting period is short, the operation is stable, no extra medicament adding cost exists, the main energy consumption comes from high temperature, and the problem of high temperature source can be solved by combining the sludge pyrohydrolysis waste heat;
the device is provided with three sets of SBR reactors, the operation control is convenient and simple, other auxiliary equipment is not needed in the long-term operation process, and the personnel management requirement and the cost are greatly reduced;
table 1 shows the city sewage quality.
Drawings
FIG. 1 is a graph showing changes in AOB and NOB activities before and during a recovery period of high-temperature treatment of activated sludge;
FIG. 2 is a diagram showing the long-term change of trinitrogen in the shortcut nitrification reactor;
FIG. 3 is a graph showing the change in ammonia nitrogen removal rate and nitrite accumulation rate during long-term operation of a short-cut nitrification reactor;
FIG. 4 is a diagram of a reactor apparatus;
Detailed Description
The technical scheme of the invention is further explained by combining experimental implementation;
the implementation steps of the invention are as follows;
sewage in an urban sewage raw water tank (1) enters a short-range nitrification device (30) through a third water inlet pump (37) and a third water inlet valve (38), and after water inlet, the single-period operation mode is as follows, water inlet is carried out for 20min, anoxic stirring is carried out for 90min, aeration is carried out for 120min, sedimentation is carried out for 30min, water drainage is carried out for 20min, the operation is carried out for 200min, 3 periods/day, the temperature is room temperature during the operation period, DO is greater than 3mg/L, the pH changes (6.8-7.5) along with the water quality of the inlet water, and the sludge concentration is maintained at 3500 +/-200 mg;
sewage in an urban sewage raw water tank (1) enters a full-course nitrification device (4) through a first water inlet pump (2) and a first water inlet valve (3), and after water enters, a single-period operation mode is as follows, water enters for 20min, anoxic stirring is carried out for 90min, aeration is carried out for 120min, sedimentation is carried out for 30min, water is drained for 20min, the operation is carried out for 200min, 3 periods/day, the temperature is room temperature during the operation period, DO is greater than 3mg/L, the pH changes (6.8-7.5) along with the quality of the water, and the sludge concentration is maintained at 4000 +/-200 mg/L;
the sludge treatment device mainly inhibits and recovers the activated sludge, and has the specific operation that after a sludge-water mixture with 50 percent of nitrification in the whole process enters the sludge treatment device through a first sludge pump (15) and a first sludge valve (16), the activated sludge is inhibited for 30min at a high temperature of more than 50 ℃, then enters the urban sewage through a second water inlet pump (45) and a second water inlet valve (46), starts aeration recovery, continuously aerates for 10 days, monitors a pH curve according to a water quality analyzer (24), when the inflection point of the pH curve is the ammonia valley point, the aeration is stopped, the urban sewage is fed again for aeration recovery, after 10 days, 50 percent of sludge-water mixture in the reactor enters the urban sewage short-cut nitrification device (30) through a second sludge pump (27) and a second sludge valve (26), meanwhile, the urban sewage short-cut nitrification device (30) returns 50 percent of sludge-water mixture to the urban sewage full-cut nitrification device (4) through a third sludge pump (41) and a third sludge valve (42);
and (5) finishing the single-period operation, and repeating the steps for operation.
After the short-cut nitrification is successfully started, the nitrification process is stabilized in the ammonia oxidation stage for a long time, and the average nitrite accumulation rate (NO) is2 --N/(NO2 --N+NO3 --N)]100%) is 84.32%, and can ensure that the ammonia nitrogen concentration is reduced to below 1mg/L after the aeration is finished;
the foregoing is a more detailed description of the invention, taken in conjunction with the detailed description of the invention, and is for the purpose of promoting an understanding and enabling others skilled in the art to make and use the invention, and it is not to be considered as limited to the details of construction and arrangement shown, since various modifications may be made without departing from the spirit and scope of the invention.
TABLE 1
Claims (1)
1. A method for starting and stably maintaining short-cut nitrification of municipal sewage is characterized by comprising the following steps: the device comprises an urban sewage raw water tank (1), a short-cut nitrification device, a whole-course nitrification device, a sludge treatment device and a sludge reflux device;
the short-cut nitrification device comprises a third aeration pump (28), a third flow meter (29), a third aeration head (31), a third stirrer (32), a third pH probe (33), a third DO probe (34), a third water quality analyzer (35), a third sampling valve (36), a third drain valve (39) and a third drain pump (40) device;
the full-range nitrification device comprises a first aeration pump (7), a first flow meter (6), a first aeration head (5), a first stirrer (8), a first pH probe (9), a first DO probe (10), a first water quality analyzer (12), a first sampling valve (11), a first drainage valve (13) and a first drainage pump (14) device;
wherein the sludge treatment device comprises a second aeration pump (20), a second flowmeter (19), a second aeration head (18), a second stirrer (21), a second pH probe (22), a second DO probe (23), a second water quality analyzer (24), a second sampling valve (25), a second drain valve (44) and a second drain pump (43) device;
wherein the sludge reflux device comprises a reflux valve and a reflux pump;
the urban sewage short-cut nitrification device, the urban sewage whole-course nitrification device and the sludge treatment device are connected through three sets of sludge reflux devices;
the operation steps are as follows:
1) sewage in an urban sewage raw water tank (1) enters a short-range nitrification device (30) through a third water inlet pump (37) and a third water inlet valve (38), and after water inlet, the single-period operation mode is as follows, water inlet is carried out for 20min, anoxic stirring is carried out for 90min, aeration is carried out for 120min, sedimentation is carried out for 30min, water drainage is carried out for 20min, the operation is carried out for 200min and 3 periods/day, the temperature is room temperature during the operation period, DO is greater than 3mg/L, the pH changes along with the water quality of the inlet water, and the sludge concentration is maintained at 3500 +/-200 mg;
2) sewage in an urban sewage raw water tank (1) enters a full-course nitrification device (4) through a first water inlet pump (2) and a first water inlet valve (3), and after water enters, a single-period operation mode is as follows, water enters for 20min, anoxic stirring is carried out for 90min, aeration is carried out for 120min, sedimentation is carried out for 30min, water is drained for 20min, the operation is carried out for 200min, 3 periods/day, the temperature is room temperature during the operation, DO is greater than 3mg/L, the pH changes along with the quality of the water entering, and the sludge concentration is maintained at 4000 +/-200 mg/L;
3) after the full-course nitrified 50% muddy water mixture enters a sludge treatment device through a first sludge pump (15) and a first sludge valve (16), inhibiting activated sludge for 30min at a high temperature of more than 50 ℃, then entering urban sewage through a second water inlet pump (45) and a second water inlet valve (46), starting aeration recovery, continuously aerating, monitoring a pH curve according to a second water quality analyzer (24), stopping aeration when an inflection point, namely a trough point, appears on the pH curve, re-entering the urban sewage for aeration recovery, after 10 days, enabling the 50% muddy water mixture in the reactor to enter a short-course nitrifying device (30) through a second sludge pump (27) and a second sludge valve (26), and simultaneously enabling the short-course nitrifying device (30) to flow back the 50% muddy water mixture to the full-course nitrifying device (4) through a third sludge pump (41) and a third sludge valve (42);
4) and (5) finishing the single-period operation, and repeating the steps for operation.
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| CN109607791B (en) * | 2019-01-15 | 2021-12-28 | 青岛大学 | Control system for deep denitrification of municipal sewage by two-stage SPNA (shortest Path bridging) process |
| CN110002691A (en) * | 2019-05-10 | 2019-07-12 | 北京工业大学 | UCT, which is improved, by intermittent aerating couples the apparatus and method that autotrophic denitrification realizes the dephosphorization of low carbon source urban sewage advanced nitrogen |
| CN110759466B (en) * | 2019-11-21 | 2021-11-26 | 北京工业大学 | Device and method for rapidly starting and stably maintaining shortcut nitrification of municipal sewage based on triclosan |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040244715A1 (en) * | 2003-04-03 | 2004-12-09 | Schreier Harold J. | Aquaculture nitrogen waste removal |
| CN101948176A (en) * | 2010-09-29 | 2011-01-19 | 重庆大学 | Method for realizing short-cut nitrification and denitrification through online monitoring and controlling SBR (Selective Beacon Radar) aeration duration on basis of HPR (High Performance Routing) |
| CN103588352A (en) * | 2013-09-03 | 2014-02-19 | 北京工业大学 | Two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage |
| CN106865773A (en) * | 2017-04-07 | 2017-06-20 | 北京工业大学 | Add the apparatus and method that azanol realizes part short distance nitration Anammox |
| CN106865768A (en) * | 2017-03-22 | 2017-06-20 | 北京工业大学 | The short-cut nitrification and denitrification dephosphorization of SBR parts couples the apparatus and method of Anammox |
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| JP6227509B2 (en) * | 2014-09-08 | 2017-11-08 | 株式会社日立製作所 | Waste water treatment apparatus and waste water treatment method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040244715A1 (en) * | 2003-04-03 | 2004-12-09 | Schreier Harold J. | Aquaculture nitrogen waste removal |
| CN101948176A (en) * | 2010-09-29 | 2011-01-19 | 重庆大学 | Method for realizing short-cut nitrification and denitrification through online monitoring and controlling SBR (Selective Beacon Radar) aeration duration on basis of HPR (High Performance Routing) |
| CN103588352A (en) * | 2013-09-03 | 2014-02-19 | 北京工业大学 | Two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage |
| CN106865768A (en) * | 2017-03-22 | 2017-06-20 | 北京工业大学 | The short-cut nitrification and denitrification dephosphorization of SBR parts couples the apparatus and method of Anammox |
| CN106865773A (en) * | 2017-04-07 | 2017-06-20 | 北京工业大学 | Add the apparatus and method that azanol realizes part short distance nitration Anammox |
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