CN211921026U - Wastewater treatment system based on anaerobic ammonium oxidation biological denitrification reaction device - Google Patents
Wastewater treatment system based on anaerobic ammonium oxidation biological denitrification reaction device Download PDFInfo
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- CN211921026U CN211921026U CN202020311969.1U CN202020311969U CN211921026U CN 211921026 U CN211921026 U CN 211921026U CN 202020311969 U CN202020311969 U CN 202020311969U CN 211921026 U CN211921026 U CN 211921026U
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Abstract
A wastewater treatment system based on an anaerobic ammonium oxidation biological denitrification reaction device comprises an anaerobic membrane biological reaction device, wherein wastewater to be treated undergoes an anaerobic reaction in the anaerobic membrane biological reaction device to obtain first wastewater; the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and the integrated anaerobic ammonium oxidation biological denitrification reaction device is used for carrying out anaerobic ammonium oxidation biological denitrification reaction on the first wastewater to obtain standard-reaching wastewater. After the wastewater of the utility model is treated by anaerobic-biological denitrification, the quality of the effluent water is stable and reaches the standard; the utility model discloses an integral type anaerobic ammonium oxidation biological denitrification can promote waste water denitrogenation load, improves the waste water treatment pollutant and gets rid of efficiency, realizes waste water discharge to reach standard.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, especially, relate to a effluent disposal system based on anaerobic ammonium oxidation biological denitrification reaction device.
Background
The culture wastewater has the pollution characteristics of high ammonia nitrogen, high-concentration organic compounds and the like, and the main treatment modes mainly comprise returning treatment, natural treatment and biological treatment modes. The biological nitrogen removal of the sewage still mainly adopts the conventional nitrification and denitrification nitrogen removal, and has the problems of low efficiency, high energy consumption, large residual sludge amount and the like. The anaerobic ammonium oxidation biological denitrification reaction is used as a novel biological denitrification technology, and has the advantages of aeration saving, low sludge yield, no need of adding a carbon source and the like.
The anaerobic ammonia oxidation process is mainly based on a biological rotating disc, a complete mixing type reactor and the like, is limited by hydraulic retention time, hydraulic load and the like, and when the aquaculture wastewater is treated, the effluent quality is greatly influenced by the inflow water quality, the denitrification effect of the system is poor, the impact load resistance is low, and the normal operation of the system is always in danger of collapse, so that a biological treatment method and a reactor device which can more effectively deal with the water quality fluctuation and the complex change of the water quantity of the aquaculture wastewater are required to be provided aiming at the existing defects.
SUMMERY OF THE UTILITY MODEL
In view of the above, one of the main objects of the present invention is to provide a wastewater treatment system based on an anammox biological denitrification reactor, so as to at least partially solve at least one of the above technical problems.
In order to achieve the above object, the utility model provides a wastewater treatment system based on integral type anammox biological denitrification reaction device, include:
the anaerobic membrane biological reaction device is used for generating anaerobic reaction in the wastewater to be treated to obtain first wastewater;
the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and
the integrated anaerobic ammonium oxidation biological denitrification reaction device is used for carrying out anaerobic ammonium oxidation biological denitrification reaction on the first wastewater to obtain standard-reaching wastewater.
Based on the technical scheme can know, the utility model discloses a waste water treatment system based on anaerobic ammonium oxidation biological denitrification reaction device has one of following advantage at least for prior art:
1. after the wastewater is subjected to anaerobic-biological denitrification treatment, the quality of the effluent water stably reaches the standard;
2. the wastewater treatment equipment is centralized, the occupied area is reduced, and the operation and management are convenient;
3. the two biological denitrification combined control modes adopted by the utility model have high automatic operation degree and simple operation and maintenance;
4. the utility model adopts a control mode to integrate process control and end point control, flexibly deal with the fluctuation situation of the ammonia nitrogen load of the inlet water, resist the ammonia nitrogen impact load and ensure the stable quality of the outlet water;
5. the ammonia nitrogen electrode is adopted to strictly control certain ammonia nitrogen residual concentration, and the accumulation of the nitrite can be avoided, so that the inhibition phenomenon of the anaerobic ammonia oxidizing bacteria can be effectively controlled, and the long-term stable operation of the reactor is facilitated.
Drawings
FIG. 1 is a schematic structural view of a wastewater treatment plant according to an embodiment of the present invention;
in the above figures, the reference numerals have the following meanings:
100-anaerobic membrane bioreactor; 101-a water inlet pump; 102-ultrafiltration membrane water inlet end; 103-a circulation pump; 104-ultrafiltration membrane; 105-pressure gauge; 106-ultrafiltration membrane water outlet end; 200-an intermediate regulating water tank; 300-an integrated anaerobic ammonium oxidation biological denitrification reactor; 301-a second water inlet pump; 302-stirring paddle; 303-an aeration sand disc; 304-dissolved oxygen probe; 305-pH probe; 306-ammonia nitrogen electrode probe; 307-water outlet pump; 308-biological aeration fan; 400-a PLC control unit; 500-water outlet tank.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
The utility model discloses a effluent disposal system based on anaerobic ammonium oxidation biological denitrification reaction device, include:
the anaerobic membrane biological reaction device is used for generating anaerobic reaction in the wastewater to be treated to obtain first wastewater;
the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and
the integrated anaerobic ammonium oxidation biological denitrification reaction device is used for carrying out anaerobic ammonium oxidation biological denitrification reaction on the first wastewater to obtain standard-reaching wastewater.
In some embodiments of the present invention, the anaerobic membrane biological reaction device comprises:
an anaerobic membrane bioreactor in which an anaerobic reaction occurs; and
and the filtering unit is arranged outside the anaerobic membrane bioreactor.
In some embodiments of the utility model, the filtering unit is provided with a filtering water outlet and a filtering return port, the filtering water outlet is connected with the intermediate regulating water tank, and the filtering return port is communicated with the anaerobic membrane bioreactor;
in some embodiments of the present invention, the filtration unit comprises an ultrafiltration membrane and a circulation pump.
In some embodiments of the present invention, the anammox biological denitrification reactor comprises:
the integrated anaerobic ammonium oxidation biological denitrification reactor is used for carrying out anaerobic ammonium oxidation biological denitrification reaction on the first wastewater;
the aeration unit is used for providing aeration for the denitrification reaction process of the anaerobic ammonium oxidation organisms;
the monitoring unit is used for monitoring the parameters of the mixed liquid in the integrated membrane bioreactor; and
a control unit for controlling the proceeding of the internal reaction of the anaerobic ammonium oxidation biological denitrification reaction device;
in some embodiments of the present invention, the monitoring unit comprises:
the ammonia nitrogen electrode probe is used for monitoring the ammonia nitrogen concentration value of the mixed liquid in the integrated anaerobic ammonia oxidation biological denitrification reactor;
the pH probe is used for monitoring the pH value of the mixed liquid in the integrated anaerobic ammonium oxidation biological denitrification reactor; and
and the dissolved oxygen probe is used for monitoring the dissolved oxygen amount of the mixed liquid in the integrated anaerobic ammonia oxidation biological denitrification reactor.
In some embodiments of the present invention, the control unit controls the anammox biological denitrification reactor to include automatic rotation between the stages of water feeding, reacting, stirring, precipitating and draining;
in some embodiments of the utility model, the start-up of the aeration unit is controlled to the control unit, and when the detecting element monitored that the ammonia nitrogen concentration of the first waste water in the integral anaerobic ammonium oxidation biological denitrification reactor falls to 25 to 35mg/L, the aeration unit is controlled to the control unit to stop the aeration.
The utility model also discloses a wastewater treatment method adopts as above wastewater treatment system, include:
carrying out anaerobic reaction on the wastewater to be treated in an anaerobic membrane biological reaction device to obtain first wastewater;
and (3) carrying out the anammox biological denitrification reaction on the first wastewater in the integrated anammox biological denitrification reaction device, thus finishing the wastewater treatment.
In some embodiments of the present invention, the reaction temperature of the anaerobic reaction is 25 to 35 ℃.
In some embodiments of the invention, the pH of the anaerobic reaction is between 7.2 and 8.5.
In some embodiments of the invention, the anaerobic member is a ring-shaped memberThe concentration of the sludge in the oxygen reaction is 15 to 25g/L, and the organic load in the sludge is 0.25 to 0.7 kgCOD/(m)3 d)。
In some embodiments of the present invention, the anammox biological denitrification step specifically comprises:
in some embodiments of the present invention, the control unit controls the aeration unit to start, and aerates the first wastewater in the integrated anammox biological denitrification reactor to ensure that the concentration of the nitrite in the first wastewater is less than or equal to 10 mg/L;
in some embodiments of the utility model, when the detecting element monitored the ammonia nitrogen concentration of first waste water and dropped to 25 to 35mg/L, the control unit control aeration unit stopped the aeration, then opened the stirring, accomplished promptly after the stirring anaerobic ammonium oxidation biological denitrification reaction.
In an exemplary embodiment, the utility model discloses a waste water treatment system based on anaerobic ammonium oxidation biological denitrification reaction device, including anaerobic membrane biological reaction device, middle surge tank, integral type anaerobic ammonium oxidation biological denitrification reaction device and PLC the control unit. The anaerobic membrane bioreactor comprises an anaerobic membrane bioreactor and a filtering unit arranged outside the anaerobic membrane bioreactor. The integrated anaerobic ammonium oxidation biological denitrification device comprises an integrated anaerobic ammonium oxidation biological denitrification reactor (SBR reactor), a detection unit and an aeration unit.
The middle adjusting water tank is communicated with the SBR reactor through a water inlet pump controlled by the PLC, and the water inlet pump is controlled to stop in a feedback mode after the logic judgment of the PLC control unit according to the set water inlet time; the SBR is provided with a stirring paddle which is controlled to start and stop through a PLC system; DO, pH and ammonia nitrogen online electrodes are arranged in the SBR, and the obtained data are transmitted into the PLC control unit in real time and are used for storing and monitoring the operation condition of the SBR; the bottom of SBR is provided with a microporous aeration disc.
The PLC automatic control system is provided with a field touch screen and a remote computer so as to carry out field operation and remote monitoring in the automatic operation process.
The biological denitrification reaction adopts a PLC unit to automatically control and operate a dissolved oxygen-ammonia nitrogen combined control mode or a pH-ammonia nitrogen combined control mode, adopts an SBR mode to operate, and comprises 5 stages of automatic rotation of water inlet, reaction, stirring, precipitation and drainage.
The utility model provides a method of combined control shortcut nitrification-anaerobic ammonia oxidation integral type SBR operation divide into dissolved oxygen-ammonia nitrogen combined control and pH-ammonia nitrogen combined control, and it includes:
the dissolved oxygen-ammonia nitrogen combined control is characterized in that a dissolved oxygen online electrode and an ammonia nitrogen online electrode are utilized, aeration quantity is controlled through the dissolved oxygen online electrode, and further the concentration level of the nitrite in the reactor is controlled, so that shortcut nitrification and anaerobic ammonia oxidation of ammonia nitrogen are synchronously carried out in the same reactor, and the ammonia nitrogen residual concentration in the reactor is monitored through the ammonia nitrogen online electrode;
the pH-ammonia nitrogen combined control is characterized in that a pH on-line electrode and an ammonia nitrogen on-line electrode are utilized, the aeration unit is controlled to stop through the amplitude delta pH1 of the pH in the nitrification stage, the aeration unit is controlled to start through the amplitude delta pH2 of the pH in the anaerobic ammonia oxidation stage, the short-cut nitrification and anaerobic ammonia oxidation reactions of ammonia nitrogen are alternately carried out in the same reactor, and the ammonia nitrogen residual concentration in the reactor is monitored through the ammonia nitrogen on-line electrode.
The wastewater treatment method adopting the wastewater treatment system based on the integrated anaerobic ammonium oxidation biological denitrification reaction device comprises the following steps:
(1) continuously feeding the pretreated wastewater into an anaerobic membrane bioreactor through a first water inlet pump for anaerobic treatment, wherein the COD (chemical oxygen demand) of the fed water is 3000-13000 mg/L, and NH (hydrogen) is4 +N is 200-1700 mg/L;
(2) the temperature of the anaerobic membrane bioreactor is controlled between 25 and 35 ℃, the pH is controlled between 7.2 and 8.5, the sludge concentration of the anaerobic membrane bioreactor is 15 to 25g/L, and the organic load of the inlet water is controlled between 0.25 and 0.7kgCOD/· (m)3d) HRT (hydraulic retention time) between 13 and 37.5 hours;
(3) filtering the wastewater treated in the anaerobic membrane bioreactor through an ultrafiltration membrane, wherein the aperture of the ultrafiltration membrane is 500-20000 daltons;
(4) the filtered wastewater enters an intermediate regulating water tank;
(5) the water in the intermediate regulating water tank enters a subsequent integrated anaerobic ammonia oxidation biological denitrification reactor for biological denitrification reaction treatment, wherein the reaction temperature of the biological denitrification reaction is 25-35 ℃, and the method comprises the following steps:
the method for controlling and realizing the shortcut nitrification-anaerobic ammonia oxidation integrated biological denitrification by operating the PLC system with the dissolved oxygen-ammonia nitrogen combined control mode comprises the following steps:
(1) and after the period of the previous round is finished, the stirring paddle is in a stop state. And after a new cycle begins, the PLC controls the water inlet pump to be started, and when the set water inlet time is reached, the PLC control unit controls the water inlet pump to be stopped.
(2) After the water inlet pump is stopped, the aeration unit is started, and the concentration of the nitrous in the SBR is ensured to be below 10mg/L by controlling the DO (dissolved oxygen) concentration in the SBR. Along with the simultaneous process of the shortcut nitrification process and the anaerobic ammonia oxidation process, the ammonia nitrogen on-line electrode reading for monitoring the ammonia nitrogen concentration change in the SBR in real time is continuously reduced.
(3) Controlling the residual concentration of ammonia nitrogen in the reactor to be 30mg/L, when the reading of the ammonia nitrogen on-line electrode is reduced to 30mg/L, the PLC controls the aeration unit to stop, the concentration of dissolved oxygen in the system is rapidly reduced to 0mg/L, and the SBR enters a stirring stage. If necessary, a large-flow air stripping measure can be added before the end of the precipitation stage, so that the sludge is ensured to have good sedimentation performance.
(4) And after the stirring stage is finished, the PLC controls the stirring paddle to stop working, the SBR enters a precipitation stage, and sludge is precipitated at the bottom of the reactor to realize mud-water separation.
(5) After the precipitation is finished, the PLC controls to start the drainage pump, the drainage stage is started, the liquid level is reduced, and after the set value is reached, the drainage pump is closed to wait for the beginning of the next period.
By utilizing the device, the method for controlling and realizing the integrated denitrification of the shortcut nitrification and the anaerobic ammonia oxidation by operating the PLC control unit with the pH-ammonia nitrogen combined control mode comprises the following steps:
and after the period of the previous round is finished, the stirring paddle is in a stop state. After a new cycle begins, the PLC controls the water inlet pump to be started, and when the set water inlet time is reached, the PLC controls the single-control water inlet pump to be stopped.
After the water inlet pump is stopped, the aeration unit is started, the reactor is in an aeration stage, ammonia nitrogen is subjected to nitrosation reaction, the pH value is continuously reduced, when the pH value reduction amplitude reaches preset delta pH value 1, the PLC controls the aeration unit to stop, and the DO concentration is rapidly reduced to 0 mg/L. Followed by a separate anammox reaction. And (3) the pH value of the anaerobic ammonia oxidation reaction is increased due to the consumption of hydrogen ions, when the pH value is increased to reach a preset value delta pH2, the PLC controls the aeration unit to be restarted to oxygenate the reactor, and the operation is circulated. In the period, along with the alternative proceeding of two reaction processes of nitrosation reaction and anaerobic ammonia oxidation, the ammonia nitrogen concentration in the reactor is continuously reduced, and the ammonia nitrogen online electrode reading is continuously reduced.
Controlling the residual concentration of ammonia nitrogen in the reactor to be 30mg/L, when the reading of the ammonia nitrogen on-line electrode is reduced to 30mg/L, the PLC controls the aeration unit to stop, the concentration of dissolved oxygen in the SBR reactor is rapidly reduced to 0mg/L, and the SBR enters a stirring stage. If necessary, a large-flow air stripping measure can be added before the end of the precipitation stage, so that the sludge is ensured to have good sedimentation performance.
And after the stirring stage is finished, the PLC controls the stirring to stop working, the SBR enters the precipitation stage, and the sludge is precipitated at the bottom of the reactor to realize mud-water separation.
After the precipitation is finished, the PLC controls to start the drainage pump, the drainage stage is started, the liquid level is reduced, and after the set value is reached, the drainage pump is closed to wait for the beginning of the next period.
The technical solution of the present invention is further explained by the following specific embodiments with reference to the attached drawings. It should be noted that the following specific examples are only illustrative, and the scope of the present invention is not limited thereto.
The test methods used in the following examples are all conventional methods unless otherwise specified.
Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
The wastewater treatment system of the combined anaerobic membrane bioreactor-integrated anaerobic ammonium oxidation biological denitrification reactor process adopted in the following examples, as shown in fig. 1, comprises an anaerobic membrane bioreactor and an integrated anaerobic ammonium oxidation biological denitrification reactor, wherein,
the anaerobic membrane biological reaction device comprises: a first water inlet pump 101, an anaerobic membrane bioreactor 100, a circulating pump 103 and an ultrafiltration membrane component 104. The first water inlet pump 101 is connected with the anaerobic membrane bioreactor 100, the anaerobic membrane bioreactor 100 is connected with a circulating pump 103 and a return pipe of an ultrafiltration membrane 104, the circulating pump 103 is connected with the ultrafiltration membrane 104, and the ultrafiltration membrane 104 is connected with the intermediate adjusting water tank 200.
Integral type anaerobic ammonium oxidation biological denitrification reaction device includes: the integrated anaerobic ammonia oxidation biological denitrification reactor comprises a second water inlet pump 301, a DO probe 304, a PH probe 305, an ammonia nitrogen online probe 306, an integrated anaerobic ammonia oxidation biological denitrification reactor 300, a PLC control unit 400 and an aerated sand tray 303, wherein the second water inlet pump 301 is connected with an intermediate regulating water tank 200, the integrated anaerobic ammonia oxidation biological denitrification reactor 300 is connected with the second water inlet pump 301, and the PLC control unit 400 monitors the operation condition in the integrated anaerobic ammonia oxidation biological denitrification reactor 300 in real time through the DO probe 304, the PH probe 305 and the ammonia nitrogen online probe 306.
In this embodiment, the inlet water is continuously fed into the anaerobic membrane bioreactor 100 through the first inlet pump 101. The effluent of the anaerobic membrane bioreactor 100 enters an ultrafiltration membrane 104 for filtration through a circulating pump 103, the return water of the ultrafiltration membrane 104 enters the anaerobic membrane bioreactor 100, and the filtered water enters an intermediate regulating water tank 200. The wastewater in the intermediate regulating water tank 200 intermittently enters the integrated anammox biological denitrification reactor 300 through a second water inlet pump 301. The PLC control unit 400 monitors the operation condition in the integrated anaerobic ammonia oxidation biological denitrification reactor 300 in real time through the DO probe 304, the PH probe 305 and the ammonia nitrogen online probe 306, biological denitrification is carried out by utilizing different control modes, and the aim of anaerobic ammonia oxidation biological denitrification is finally achieved.
Example 1
In this embodiment, the water inlet flow of the anaerobic membrane bioreactor is 7m3D, organic loading rate 1.3 (kg/m)3D), the hydraulic retention time is 3.5d, and the sludge retention time is 80 days; integrated anaerobic ammonium oxidation biological denitrification reactorAmmonia nitrogen inlet load is 0.64 (kg/m)3/d)。
The concentration and removal rate of pollutants in the wastewater before and after the treatment by the above steps are shown in table 1.
TABLE 1 results of wastewater treatment runs
ND: not detected out
As can be seen from the data in Table 1, after the wastewater is treated, the removal rate of COD reaches 97.5 percent and the removal rate of NH reaches4 +The removal rate of-N reaches 97.4 percent, which shows that the wastewater treatment method based on the integrated anaerobic ammonia oxidation biological denitrification reaction device has better treatment effect on pollutants.
Example 2
In this embodiment, the water inlet flow of the anaerobic membrane bioreactor is 9m3D, organic Loading ratio 1.6 (kg/m)3(d), the hydraulic retention time is 3.1d, and the sludge retention time is 80 days; ammonia nitrogen inlet load of the integrated anaerobic ammonia oxidation biological denitrification reactor is 0.3 (kg/m)3And d) the sludge retention time is 19 d.
The concentration and removal rate of pollutants in the wastewater before and after the treatment by the above steps are shown in Table 2.
TABLE 2 results of wastewater treatment runs
| Parameters (mg/L) | Inflow water | Discharging water | Average removal rate (%) |
| COD | 8372±203 | 315±78 | 96.3 |
| NH4 +-N | 1242±91 | 29.6±7 | 97.7 |
| NO2 --N | ND | ND | — |
| NO3 --N | 57±14 | 6±2 | 89.5 |
As can be seen from the data in Table 2, after the wastewater is treated, the removal rate of COD reaches 96.3 percent and the removal rate of NH reaches4 +The removal rate of-N reaches 97.7 percent, which shows that the wastewater treatment method based on the integrated anaerobic ammonia oxidation biological denitrification reaction device has better treatment effect on pollution.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A wastewater treatment system based on an anaerobic ammonium oxidation biological denitrification reaction device is characterized by comprising:
the anaerobic membrane biological reaction device is used for generating anaerobic reaction in the wastewater to be treated to obtain first wastewater;
the middle adjusting water tank is connected with a water outlet of the anaerobic membrane biological reaction device and is used for adjusting the first wastewater; and
the integrated anaerobic ammonium oxidation biological denitrification reaction device is used for carrying out anaerobic ammonium oxidation biological denitrification reaction on the first wastewater to obtain standard-reaching wastewater.
2. The wastewater treatment system according to claim 1,
the anaerobic membrane biological reaction device comprises:
an anaerobic membrane bioreactor in which an anaerobic reaction occurs; and
and the filtering unit is arranged outside the anaerobic membrane bioreactor.
3. The wastewater treatment system according to claim 2,
the filter unit is provided with a filter water outlet and a filter backflow port, the filter water outlet is connected with the intermediate regulating water tank, and the filter backflow port is communicated with the anaerobic membrane bioreactor.
4. The wastewater treatment system according to claim 2,
the filtration unit comprises an ultrafiltration membrane and a circulation pump.
5. The wastewater treatment system according to claim 1,
the anaerobic ammonium oxidation biological denitrification reaction device comprises:
the integrated anaerobic ammonium oxidation biological denitrification reactor is used for carrying out anaerobic ammonium oxidation biological denitrification reaction on the first wastewater;
the aeration unit is used for providing aeration for the denitrification reaction process of the anaerobic ammonium oxidation organisms;
the monitoring unit is used for monitoring the parameters of the mixed liquid in the integrated membrane bioreactor; and
and the control unit is used for controlling the internal reaction of the anaerobic ammonium oxidation biological denitrification reaction device.
6. The wastewater treatment system according to claim 5,
the monitoring unit includes:
the ammonia nitrogen electrode probe is used for monitoring the ammonia nitrogen concentration value of the mixed liquid in the integrated anaerobic ammonia oxidation biological denitrification reactor;
the pH probe is used for monitoring the pH value of the mixed liquid in the integrated anaerobic ammonium oxidation biological denitrification reactor; and
and the dissolved oxygen probe is used for monitoring the dissolved oxygen amount of the mixed liquid in the integrated anaerobic ammonia oxidation biological denitrification reactor.
7. The wastewater treatment system according to claim 5,
the control unit controls the anaerobic ammonium oxidation biological denitrification reaction device to automatically rotate among water feeding, reaction, stirring, precipitation and drainage stages.
8. The wastewater treatment system according to claim 5,
the control unit controls the aeration unit to start, and when the detection unit detects that the ammonia nitrogen concentration of the first wastewater in the integrated anaerobic ammonia oxidation biological denitrification reactor is reduced to 25-35 mg/L, the control unit controls the aeration unit to stop aeration.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113402130A (en) * | 2021-07-30 | 2021-09-17 | 南京环保产业创新中心有限公司 | Stepped electrochemical enhanced multi-cycle denitrification and decarbonization bioreactor and process thereof |
| CN114906930A (en) * | 2021-02-08 | 2022-08-16 | 清华大学 | Water treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114906930A (en) * | 2021-02-08 | 2022-08-16 | 清华大学 | Water treatment system |
| CN113402130A (en) * | 2021-07-30 | 2021-09-17 | 南京环保产业创新中心有限公司 | Stepped electrochemical enhanced multi-cycle denitrification and decarbonization bioreactor and process thereof |
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