CN210163206U - Short-range biological nitrogen and phosphorus removal system - Google Patents
Short-range biological nitrogen and phosphorus removal system Download PDFInfo
- Publication number
- CN210163206U CN210163206U CN201920927588.3U CN201920927588U CN210163206U CN 210163206 U CN210163206 U CN 210163206U CN 201920927588 U CN201920927588 U CN 201920927588U CN 210163206 U CN210163206 U CN 210163206U
- Authority
- CN
- China
- Prior art keywords
- gas supply
- aerobic
- zone
- low
- main pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model discloses a short-range biological nitrogen and phosphorus removal system, which belongs to the technical field of sewage treatment. The short-range biological nitrogen and phosphorus removal system comprises an anaerobic zone, an anoxic zone, an aerobic middle gas supply zone, an aerobic low gas supply zone and an aerobic high gas supply zone which are sequentially connected in series, wherein a stirrer is arranged in the aerobic low gas supply zone; the aerobic high-gas supply area is connected with a secondary sedimentation tank, the bottom of the secondary sedimentation tank is connected with a water inlet main pipe through a pipeline, a sludge reflux pump is arranged on the pipeline, and the upper part of the secondary sedimentation tank is connected with a water outlet main pipe; the tail end of the aerobic low gas supply area is provided with an internal reflux pump, and the internal reflux pump is connected with the starting end of the anoxic area. The utility model discloses the air supply volume of good oxygen pond divides in, low, three high subregion air feed modes, sets up short dwell time's high air feed district behind low air feed district, has solved short distance nitrification and denitrification well and must control under low DO concentration condition, nevertheless gathers phosphorus fungus and must accomplish this contradiction to the absorption of phosphorus under high DO concentration condition below.
Description
Technical Field
The utility model relates to a short-range biological nitrogen and phosphorus removal system, which belongs to the technical field of sewage treatment.
Background
Due to the use of a large amount of fertilizer and the dischargeVarious sewages already cause a plurality of lakes, and river water body nitrogen and phosphorus are seriously polluted to cause water body eutrophication, the water body eutrophication is one of the major environmental problems facing the current society, the economic and effective control of the water body eutrophication becomes an environmental problem to be solved urgently, and the nitrogen and phosphorus removal of the sewage can effectively prevent and control the water body eutrophication. The biological treatment of sewage is developing towards high efficiency and low energy consumption, the short distance nitration can save aeration energy consumption, the traditional A method2In the O biological dephosphorization and denitrification process, the short-cut nitrification and denitrification must be controlled under the condition of low DO concentration, but the phosphorus accumulating bacteria must be capable of completing the absorption of phosphorus under the condition of high DO concentration, thereby generating contradiction.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect, provide a short distance biological nitrogen and phosphorus removal system, the air supply volume of good oxygen pond divides in, low, high three subregion air feed mode, sets up short dwell time's high air feed district behind low air feed district, has solved the short distance well and has nitrified the denitrification must be controlled under low DO concentration condition, nevertheless gathers phosphorus fungus and must accomplish this contradiction to the absorption of phosphorus under high DO concentration condition below.
In order to solve the technical problem, the utility model provides a short-range biological nitrogen and phosphorus removal system which is characterized by comprising an anaerobic zone, an anoxic zone, an aerobic middle gas supply zone, an aerobic low gas supply zone and an aerobic high gas supply zone which are sequentially connected in series, wherein the anaerobic zone, the anoxic zone and the aerobic low gas supply zone are all provided with a stirrer; the aerobic high-gas supply area is connected with a secondary sedimentation tank, the bottom of the secondary sedimentation tank is connected with a water inlet main pipe through a pipeline, a sludge reflux pump is arranged on the pipeline, the pipeline is also connected with a pipeline for discharging excess sludge, and the upper part of the secondary sedimentation tank is connected with a water outlet main pipe; the tail end of the aerobic low gas supply area is provided with an internal reflux pump, and the internal reflux pump is connected with the starting end of the anoxic area.
Preferably, the aerobic middle gas supply zone, the aerobic low gas supply zone and the aerobic high gas supply zone are respectively connected with a gas supply main pipe from a gas supply main pipe, and electric regulating valves are respectively arranged on the gas supply main pipes to regulate the gas supply ratio of each aerobic subarea.
Preferably, the DO of the aerobic low air supply zone is controlled within the range of 0.2-0.8 mg/L, and the DO of the aerobic high air supply zone is controlled within the range of 2-3 mg/L.
Preferably, the air supply main pipe is connected with the air blower, an air flow meter is installed on the air supply main pipe, and the total air supply quantity of the air blower is dragged by frequency conversion and is controlled by a PLC.
Preferably, the internal reflux ratio of the internal reflux pump is greater than 4, and the internal reflux ratio is continuously adjusted through PLC control.
Preferably, the internal reflux pump is a weir outlet fan blade water pump.
Preferably, the agitator is a bi-directional circulation agitator.
Preferably, the anaerobic zone is provided with a cell, the anoxic zone is provided with three cells, the aerobic middle air supply zone is provided with two cells, the aerobic low air supply zone is provided with three cells, and the aerobic high air supply zone is provided with a cell.
Preferably, the aerobic low gas supply area and the aerobic high gas supply area are respectively provided with a DO instrument, the anoxic area is provided with an ammonia nitrogen instrument, a pH instrument and a temperature on-line instrument, the aerobic low gas supply area is provided with a nitrate on-line instrument, and the aerobic high gas supply area is provided with a sludge concentration instrument; the water inlet main pipe is provided with a COD (chemical oxygen demand), total nitrogen and ammonia nitrogen online instrument and a water inlet flow meter; the water outlet main pipe is provided with a COD (chemical oxygen demand), total nitrogen and ammonia nitrogen online instrument; a sludge reflux flowmeter is arranged on the pipeline for installing the sludge reflux pump.
The utility model discloses the beneficial effect who reaches:
1. the DO concentration is controlled by adopting zone air supply in an aerobic section, the air supply amount of an aerobic pool is divided into a middle zone air supply mode, a low zone air supply mode and a high zone air supply mode, the DO of the aerobic low air supply zone is controlled within the range of 0.2-0.8 mg/L, the DO of the aerobic high air supply zone is controlled within the range of 2-3 mg/L, a high air supply zone with short retention time is arranged behind the low air supply zone, the DO concentration in the aerobic section is characterized by 'two low zones and one high zone', the two low DO concentration zones can stably realize short-range biological denitrification, and the high DO concentration zone ensures the realization of biological phosphorus removal characteristics, thereby solving the contradiction that the short-range nitrification denitrification needs to be controlled under the condition of low DO concentration, but the phosphorus accumulating bacteria needs to be capable of absorbing phosphorus under the condition of high DO concentration. In order to maintain the low DO concentration characteristic of the aerobic low-air-supply area, a stirrer is arranged to meet the requirement of a mixing and stirring function.
2. The utility model discloses a reflux ratio in the super large (internal reflux ratio > 4), the super large internal reflux ratio is compared total nitrogen and is gone out the water concentration and reduce and realize through the ammonia nitrogen concentration that reduces when mixed liquid gets into the aerobic section, and super large internal reflux makes sewage organic carbon pass through oxygen deficiency aerobic environment along with the backward flow many times, has improved the biodegradability of organic carbon to the utilization ratio of former sewage carbon source has been increased. Meanwhile, the total nitrogen concentration of the effluent can be far lower than the current national discharge standard, the result is realized under the condition of utilizing the low C/N ratio of the original sewage (without adding a carbon source), the operation cost of a sewage treatment plant is greatly reduced, on one hand, the energy consumption is saved by about 30 percent, and simultaneously, the high removal rate of the total nitrogen is realized.
3. After the ammonia oxidation dominant bacteria colony of the short-range biological denitrification is formed, the system has the impact resistance of high DO concentration due to the fact that the number of nitrite oxidation bacteria colony in the system is greatly small, the impact resistance duration can reach several hours or even tens of hours, and low DO control is very easy to achieve.
4. The influence of the temperature on the short-range biological denitrification is only expressed in the biological reaction rate, and in the actual application, the concentration of the activated sludge can be increased to offset the influence of the reduction of the biological reaction rate caused by low temperature, so that the biological reaction capacity of the system is improved. When the water temperature is lower than 18 ℃, the daily discharge amount of the residual sludge of the system is reduced, the concentration of the activated sludge in the system is improved, the adverse effect of low environmental temperature in winter is adapted, and the effluent is ensured to reach the standard.
Drawings
FIG. 1 is a schematic structural diagram of the short-range biological denitrification and dephosphorization system of the present invention;
FIG. 2 is monitored data during a startup phase;
FIG. 3 is a graph of the effect of temperature on total nitrogen removal;
FIG. 4 is a graph of DO concentration versus nitrite accumulation rate;
figure 5 is the effect of internal reflux ratio on total nitrogen of effluent.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in figure 1, a short-range biological nitrogen and phosphorus removal system comprises an anaerobic zone 3, an anoxic zone 4, an aerobic middle air supply zone 5, an aerobic low air supply zone 6 and an aerobic high air supply zone 7 which are sequentially connected in series, wherein a stirrer 10 is installed in the anaerobic zone 3, the anoxic zone 4 and the aerobic low air supply zone 6, the stirrer 10 is a bidirectional circulation stirrer, the stirrer can ensure that no dead angle exists in the stirring of unit cells, and meanwhile, the low flow rate of surface flow of the unit cells can be realized, so that the oxygen charging amount of the surface flow is reduced.
The aerobic high-air-supply area 7 is connected with a secondary sedimentation tank 9 through an outlet pipe 8, the bottom of the secondary sedimentation tank 9 is connected with a water inlet main pipe 18 through a pipeline, a sludge reflux pump 14 is arranged on the pipeline, and the sludge reflux ratio is continuously adjustable from 0% to 50%. The pipeline is also connected with a pipeline for discharging excess sludge, and the upper part of the secondary sedimentation tank 9 is connected with a water outlet main pipe 19. Activated sludge is subjected to mud-water separation by adopting a secondary sedimentation tank 9, and the sludge reflux pump 14 arranged in a sludge reflux pump room (well) ensures A2O-bioreactor microbial biomass while discharging excess sludge. The water inlet main pipe 18 is connected with the water inlet pump room 1, and the water inlet pump 2 is arranged in the water inlet pump room 1.
The terminal of the good oxygen low air supply district 6 is equipped with interior reflux pump 12, interior reflux pump 12 is connected with the open end of anoxic zone 4 for the open end that the mixed liquid of the terminal of the good oxygen low oxygen supply district 6 flows back to anoxic zone 4, interior reflux ratio of interior reflux pump 12 >4, and interior reflux ratio passes through PLC control and realizes continuous regulation. The internal reflux pump 12 is a weir outlet flow fan blade water pump which can reduce the phenomenon of effluent falling and oxygenation to the maximum extent, and simultaneously, a check valve is cancelled, thereby reducing energy consumption.
The aerobic middle air supply area 5, the aerobic low air supply area 6 and the aerobic high air supply area 7 are respectively connected with an air supply main pipe from an air supply main pipe, and the air supply main pipe is respectively provided with an electric regulating valve 11 so as to regulate the air supply ratio of each aerobic subarea. The dissolved oxygen of each aerobic zone is controlled within a required range by real-time measurement value real-time adjustment of a DO instrument. The air supply main pipe is connected with the air blower 15, the air flow meter 13 is installed on the air supply main pipe, the total air supply quantity of the air blower 15 is dragged by frequency conversion and is controlled by the PLC, and the total air supply quantity can be adjusted in real time.
The experimental control of the residence time is realized by arranging different unit cells in each zone. The total retention time of the test is controlled to be 12-16 hours, and each unit cell is 1-2 hours. The method specifically comprises the following steps: the anaerobic zone 3 is provided with a cell, the anoxic zone 4 is provided with three cells, the aerobic middle air supply zone 5 is provided with two cells, the aerobic low air supply zone 6 is provided with three cells, and the aerobic high air supply zone 7 is provided with a cell. When the cell of each unit meets the requirement of no water break, only the diversion requirement of the same water level is met.
The detection instrument is provided with: the aerobic low gas supply area 6 and the aerobic high gas supply area 7 are respectively provided with a DO instrument, the anoxic area 4 is provided with an ammonia nitrogen instrument, a pH instrument and a temperature on-line instrument, the aerobic low gas supply area 6 is provided with a nitrate on-line instrument, and the aerobic high gas supply area 7 is provided with a sludge concentration instrument; the water inlet main pipe 18 is provided with a COD, total nitrogen and ammonia nitrogen online instrument and a water inlet flow meter 16; the water outlet main pipe 19 is provided with a COD, total nitrogen and ammonia nitrogen online instrument; a sludge reflux flowmeter 17 is arranged on the pipeline for installing the sludge reflux pump 14. All power equipment is automatically controlled by a PLC.
The control method of the short-range biological nitrogen and phosphorus removal system comprises the following steps:
(1) the sludge is concentrated by adopting a secondary sedimentation tank of a sewage plant at the beginning of starting, water is not fed in a few days at the beginning, ammonium carbonate is directly added at regular time, and the ammonia nitrogen concentration and alkalinity in water are improved so as to meet the growth environment of ammonia oxidizing bacteria.
(2) And starting a sludge reflux pump to enable activated sludge to enter an anaerobic zone, an anoxic zone, an aerobic middle air supply zone, an aerobic low air supply zone and an aerobic high air supply zone which are sequentially connected in series.
(3) Starting each stirrer and an internal reflux pump, maintaining the DO in the aerobic low-air-supply area to be controlled within the range of 0.2-0.8 mg/L, and enabling microorganisms which are not suitable for the low-DO environment to generate an autolysis phenomenon, so that the water quality is turbid, and the autolyzed microorganisms supplement nutrients required by the propagation of ammonia oxidizing bacteria such as a mixed liquid carbon source, phosphorus and the like. The DO of the aerobic high-air-supply area is controlled within the range of 2-3 mg/L, and the requirement of phosphorus-accumulating bacteria on the absorption of phosphate is met. The internal reflux ratio of the internal reflux pump is adjusted to be more than 4, so that the availability of the carbon source of the original sewage can be improved, and the high removal rate of the total nitrogen is realized.
The aerobic low gas supply area and the aerobic high gas supply area supply gas through the blowers, and the PLC adjusts the DO values of the aerobic low gas supply area and the aerobic high gas supply area in real time through the electric adjusting valve according to the real-time measurement value of the DO instrument under the condition that the total gas supply quantity meets the requirement. The total air supply quantity of the blower is obtained by the PLC according to the calculation of the COD of the inlet water, the total nitrogen, the ammonia nitrogen concentration, the inlet water flow and the activated sludge concentration, the PLC calculates once every 2 hours and sends a control instruction to the blower; and after the instruction is sent for 15 minutes, the PLC finely adjusts and corrects the total air supply quantity according to the concentration of the DO meter, and then the PLC corrects the total air supply quantity every 15 minutes.
(4) Opening a valve of a water inlet pump to continuously feed water, and monitoring COD and NH of the water quality of the discharged water and the internal reflux water4 +-N、NO2 --N、NO3 --the value of N.
Fig. 2 shows monitoring data during the start-up phase. Using conventional A2The sludge of the O process is enriched into dominant flora by ammonia oxidizing bacteria, and the enrichment needs about half a month. FIG. 2 shows that the accumulation rate of nitrite is greater than 80% at the 12 th day of start, which indicates that the enrichment of ammonia oxidizing bacteria is substantially completed, and the experiment proves that the short-range biological denitrification is realized by only controlling the adjustment of the air supply amount and the adjustment of the air supply ratio of each subarea to accurately control the DO value of the aerobic tank.
(5) When the water temperature is lower than 18 ℃, the daily discharge amount of the residual sludge of the system is reduced, and the concentration of the activated sludge in the system is improved. The relation between the concentration of the activated sludge and the temperature is calculated by the parameters of COD (chemical oxygen demand), total nitrogen, ammonia nitrogen concentration, daily sewage treatment capacity, activated sludge concentration and water temperature of inlet and outlet water to obtain the relation between the temperature and the biochemical reaction rate, and the activated sludge concentration at low temperature is calculated according to the biochemical reaction rate.
Example 1 Effect of temperature on Total Nitrogen removal
FIG. 3 shows the accumulation of Total Nitrogen (TN) and nitrite nitrogen in effluent at different ambient temperatures, with three experimental data from 10-12 months. The test finds that: the influence of temperature on the shortcut nitrification and denitrification is very limited, which is mainly reflected in the influence on the biological reaction rate, which is consistent with the general rule of biological reaction. Satisfactory results are obtained in the effluent TN and nitrosation accumulation test data of 3 temperature sections, but the biological reaction rate is obviously reduced when the temperature is lower than 15 ℃, and the effluent TN concentration is increased. After the system reduces the discharge amount of the residual sludge for several days continuously, the concentration of the activated sludge (MLSS) of the system is increased from 2140mg/L to 3250mg/L, the TN concentration of the effluent returns to the original state, and the TN of the effluent is stable at 5-6 mg/L. In the actual operation of the municipal sewage treatment plant, the temperature can not be controlled generally, the adverse effect of low environmental temperature in winter can be adapted by adjusting the MLSS concentration, and the effluent can reach the standard.
Example 2 Effect of Dissolved Oxygen (DO)
FIG. 4 is a graph of DO concentration versus nitrite accumulation rate. Data from a single high DO shock test run for 2 months of stable operation. The impact time is 16 hours, the impact DO concentration is 1.2-2.0 mg/L, and experiments show that: and (3) impacting for 16 hours without destroying the dominant flora of the ammonia oxidizing bacteria, wherein the nitrite accumulation rate of the system is still in an interval of more than 80% during the impacting period.
Example 3 influence of internal reflux ratio
Mixed reflux ratio (also known as internal reflux ratio R)1) The design specification and engineering practice usually adopt 200% -400%. In A2In the O process flow, the organic nitrogen and ammonia nitrogen contained in the inlet water TN may partially change the existing form of the inlet water TN in the anoxic section, but the TN content generated by the inlet water TN cannot be changed, and the ammonia nitrogen and the organic nitrogen are mainly converted into nitrite and nitrate in the reaction of the aerobic section. And nitrite and nitrate in TN are removed only by denitrification reaction in an anoxic zone.
If the ammonia nitrogen concentration in the internal reflux water is ignored (usually less than 1 mg/L), according to the constant calculation of materials, the ammonia nitrogen concentration in the mixed solution entering the aerobic zone is about the ammonia nitrogen concentration of the inlet water and is diluted into 1/(1+ R1) by the internal reflux, and the nitrate nitrogen generated by the aerobic reaction of the ammonia nitrogen at the moment is the main component of the outlet water TN.
FIG. 5 is a graph showing the comparison of different internal reflux ratios with the output water TN concentration. The curves show that: the internal reflux ratio directly affects the removal rate of TN. Through the test, the following results are found: firstly, the reduction of the concentration of the TN effluent by the oversized internal reflux ratio is realized by reducing the concentration of ammonia nitrogen when the mixed liquid enters an aerobic section. And secondly, the oversized internal reflux enables organic carbon in the sewage to pass through an anoxic and aerobic environment for many times along with the reflux, so that the biodegradability of the organic carbon is improved, and the utilization rate of an original sewage carbon source is increased.
Example 4 Effect of aerobic zone zoned air feed on shortcut biological Denitrification stability
The biological phosphorus and nitrogen removal function is A2The greatest advantage of the O process, however, the short-range biological denitrification needs to control DO in a low concentration state so as to form a stable Ammonia Oxidizing Bacteria (AOB) dominant flora, and phosphorus absorption of phosphorus accumulating bacteria needs high DO, which creates a contradiction between the two. The utility model adopts a partitioned air supply scheme to solve the problem in the aerobic section, and the scheme divides the aerobic section into a middle air supply area, a low air supply stirring area and 3 high air supply areas.
The DO is monitored in the middle gas supply area of the first half section (3 aerobic units) of the aerobic section, wherein the water quality indexes are relatively high, the ammonia oxidation oxygen consumption rate is maximum, and the DO concentration of the area is always below 0.5mg/L no matter how large the gas supply amount is, which is mainly caused by that the oxygen supply rate is smaller than the biological oxygen consumption rate.
The air supply control in the low air supply stirring area is a key link for realizing short-range biological denitrification. Most (or complete) ammonia nitrogen is oxidized into nitrite through the oxidation of the middle gas supply area, only a small part of ammonia oxidation needs to be carried out in the area, therefore, the gas demand change of the area is the largest, the gas demand can be zero when the gas demand is the smallest (an automatic control system can reduce the total gas supply), the mixing and stirring function realized through aeration is lost, and a stirrer needs to be added in the area. In the area, the dissolved oxygen concentration of the mixed liquid is continuously tracked by an online DO instrument, and the DO is controlled between 0.2 and 0.8mg/L by automatically adjusting the air supply amount through a PLC.
The first two areas of the aerobic section account for 83 percent (accounting for 50 percent of the total volume) of the volume of the aerobic section, and are key monitoring areas for short-range biological denitrification. The aerobic low air feed, low DO concentration zone of 1/3 is actually monitored and controlled.
The high oxygen supply area (high oxygen area) of the aerobic section is arranged at A2At the end of the O process, this zone represents 10% of the total cell volume. The region is set to meet the requirement of phosphate absorption by the phosphorus accumulating bacteria. In this zone, the dissolved oxygen concentration of the mixed solution was rapidly increased to about 2 to 3 mg/L by supplying a high amount of gas. The nitrite oxidizing bacteria oxidation phenomenon is found in the area, but the nitrite oxidizing bacteria oxidation phenomenon does not damage the stability of the ammonia oxidizing bacteria of the system to become dominant flora due to the short residence time in the area. The whole system is still in a short-range biological denitrification state and has a dephosphorization function.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (9)
1. A short-range biological nitrogen and phosphorus removal system is characterized by comprising an anaerobic zone, an anoxic zone, an aerobic middle gas supply zone, an aerobic low gas supply zone and an aerobic high gas supply zone which are sequentially connected in series, wherein mixers are arranged in the anaerobic zone, the anoxic zone and the aerobic low gas supply zone; the aerobic high-gas supply area is connected with a secondary sedimentation tank, the bottom of the secondary sedimentation tank is connected with a water inlet main pipe through a pipeline, a sludge reflux pump is arranged on the pipeline, the pipeline is also connected with a pipeline for discharging excess sludge, and the upper part of the secondary sedimentation tank is connected with a water outlet main pipe; the tail end of the aerobic low gas supply area is provided with an internal reflux pump, and the internal reflux pump is connected with the starting end of the anoxic area.
2. The system of claim 1, wherein the aerobic middle gas supply zone, the aerobic low gas supply zone and the aerobic high gas supply zone are respectively connected to a gas supply main pipe from a gas supply main pipe, and electric control valves are respectively arranged on the gas supply main pipe to adjust the gas supply ratio of each aerobic sub-zone.
3. The system of claim 1, wherein the aerobic low-gas-supply zone DO is controlled within a range of 0.2-0.8 mg/L, and the aerobic high-gas-supply zone DO is controlled within a range of 2-3 mg/L.
4. The system of claim 2, wherein the main gas supply pipe is connected to a blower, an air flow meter is installed on the main gas supply pipe, and the total gas supply amount of the blower is dragged by frequency conversion and is controlled by a PLC.
5. The system of claim 1, wherein the internal reflux ratio of the internal reflux pump is greater than 4, and the internal reflux ratio is continuously adjusted by PLC control.
6. The system of claim 1, wherein the internal reflux pump is a weir exit flow vane pump.
7. The system of claim 1, wherein the agitator is a bi-directional circulation agitator.
8. The system of claim 1, wherein the anaerobic zone has one cell, the anoxic zone has three cells, the aerobic middle gas supply zone has two cells, the aerobic low gas supply zone has three cells, and the aerobic high gas supply zone has one cell.
9. The system of claim 1, wherein the aerobic low gas supply zone and the aerobic high gas supply zone are respectively provided with a DO instrument, the anoxic zone is provided with an ammonia nitrogen instrument, a pH instrument and a temperature on-line instrument, the aerobic low gas supply zone is provided with a nitrate on-line instrument, and the aerobic high gas supply zone is provided with a sludge concentration instrument; the water inlet main pipe is provided with a COD (chemical oxygen demand), total nitrogen and ammonia nitrogen online instrument and a water inlet flow meter; the water outlet main pipe is provided with a COD (chemical oxygen demand), total nitrogen and ammonia nitrogen online instrument; a sludge reflux flowmeter is arranged on the pipeline for installing the sludge reflux pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920927588.3U CN210163206U (en) | 2019-06-19 | 2019-06-19 | Short-range biological nitrogen and phosphorus removal system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920927588.3U CN210163206U (en) | 2019-06-19 | 2019-06-19 | Short-range biological nitrogen and phosphorus removal system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210163206U true CN210163206U (en) | 2020-03-20 |
Family
ID=70171038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920927588.3U Active CN210163206U (en) | 2019-06-19 | 2019-06-19 | Short-range biological nitrogen and phosphorus removal system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210163206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127848A (en) * | 2019-06-19 | 2019-08-16 | 太仓市捷宏节能环保科技有限公司 | A kind of short range biological denitrification dephosphorization system and its control method |
-
2019
- 2019-06-19 CN CN201920927588.3U patent/CN210163206U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127848A (en) * | 2019-06-19 | 2019-08-16 | 太仓市捷宏节能环保科技有限公司 | A kind of short range biological denitrification dephosphorization system and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11339069B2 (en) | Anaerobic ammoxidation synergistic nitrogen removal process device of municipal sewage main and side streams and application method thereof | |
| CN107162193B (en) | Device and method for treating domestic sewage by low-oxygen nitrification coupled with short-range denitrification anaerobic ammonia oxidation | |
| CN106830324B (en) | Sectional water inlet A2Device and method for enhancing biological nitrogen and phosphorus removal by adopting/O (oxygen/phosphorus) process | |
| CN110002594B (en) | Device and method for realizing shortcut nitrification-anaerobic ammonia oxidation based on hydroxylamine side inhibition | |
| CN101759290B (en) | Method for rapidly realizing and stably maintaining shortcut nitrification in continuous flow process | |
| CN108439593B (en) | Device and method for treating urban domestic sewage by continuous flow segmented water inlet DEAMOX combined sludge fermentation | |
| CN113998783B (en) | Low-carbon nitrogen and phosphorus removal device and method for municipal sewage based on partial return sludge deep anaerobic treatment | |
| CN108409033B (en) | Device and method for advanced nitrogen and phosphorus removal of segmented water inlet UCT by FNA (nitrogen rich aeration) enhanced short-cut nitrification | |
| US20240166542A1 (en) | Method and device for in-situ enriching anammox bacteria by conventional activated sludge | |
| Beylier et al. | 6.27-Biological nitrogen removal from domestic wastewater | |
| CN109205954A (en) | Light electrolysis catalysis oxidation, biochemical treatment high-concentration waste hydraulic art | |
| CN112250175A (en) | Device and method for realizing deep denitrification of municipal sewage by virtue of integrated shortcut nitrification-anaerobic ammonia oxidation coupling with endogenous shortcut denitrification | |
| CN104129853A (en) | Starting method for rapid and efficient short-cut nitrification | |
| CN112875859A (en) | Sewage nitrogen and phosphorus removal control system based on AOA technology | |
| CN113233593A (en) | Sewage treatment process and sewage treatment device | |
| CN111661925A (en) | Enhanced denitrification system and method for treating low C/N urban sewage continuous flow | |
| CN103833134A (en) | Method for achieving short-cut denitrification by continuous flow sewage treatment system | |
| CN210163206U (en) | Short-range biological nitrogen and phosphorus removal system | |
| CN113233586A (en) | Multi-mode micro-aerobic aeration AAO-MBR high-efficiency energy-saving sewage treatment device and method | |
| CN102198978A (en) | Apparatus for realizing short-cut nitrification by membrane bioreactor and method thereof | |
| CN116589096A (en) | Multi-mode AAO-MBR (anaerobic-anoxic-oxic-Membrane biological reactor) technical process control system and method | |
| CN115403150B (en) | Device and method for treating low-carbon-nitrogen-ratio urban sewage by using IFAS-SBR | |
| CN216997850U (en) | Carbon source adding device for AAO process sewage treatment | |
| CN115028265A (en) | Device and method for treating urban sewage by continuous flow sectional water inlet coupling pretreatment and fermented sludge sectional backflow reinforcement PD/A | |
| CN110127848A (en) | A kind of short range biological denitrification dephosphorization system and its control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |