CN212459638U - Urban sewage short-cut nitrification effect prejudging device - Google Patents
Urban sewage short-cut nitrification effect prejudging device Download PDFInfo
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- CN212459638U CN212459638U CN202020894420.XU CN202020894420U CN212459638U CN 212459638 U CN212459638 U CN 212459638U CN 202020894420 U CN202020894420 U CN 202020894420U CN 212459638 U CN212459638 U CN 212459638U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a device is prejudged to municipal sewage short cut nitrification effect. The urban sewage shortcut nitrification effect prejudging device comprises an activated sludge detection system and a control and regulation system. The utility model discloses a maintain an optimum environment that does benefit to nitrite oxidizing bacteria growth and detect its activity power, can be applicable to the activity detection of certain fungus crowd in the activated sludge, process flow is simple, and control operation is nimble, and the degree of accuracy is high. The utility model discloses a device is judged in advance to short journey has simple structure, reasonable in design, flexible and convenient, the treatment effeciency is high, conveniently carries, the device operation is stable and advantages such as safe and reliable.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment bacterial activity detects, more specifically relates to a device is prejudged to municipal sewage short cut nitrification effect.
Background
The most common process for municipal sewage treatment is the activated sludge process. The traditional activated sludge method can realize the removal of various pollutants simultaneously by the alternate operation of activated sludge in an anoxic-aerobic environment. The microorganisms carry out nitration reaction in an aerobic environment and remove partial organic matters, and the organic matters are used for carrying out denitrification reaction under the anoxic condition to realize denitrification. The denitrification effect of the conventional nitrification and denitrification process is obviously influenced by organic matters, and the denitrification efficiency is generally low under the condition of low carbon-nitrogen ratio. The carbon nitrogen ratio of part of municipal sewage is generally lower, and the organic matter in the inlet water can not be efficiently utilized, so that the nitrogen element in the outlet water can not stably reach the standard, and the basic requirement of reclaimed water recycling can not be met.
The appearance of the shortcut nitrification/anaerobic ammonia oxidation process provides a new idea for the treatment and the regeneration of the municipal sewage. Partial ammonia nitrogen is oxidized into nitrite nitrogen by short-cut nitrification, and then the ammonia nitrogen and nitrite are directly converted into nitrogen by subsequent anaerobic ammonia oxidation. The process has the advantages of high treatment load, low energy consumption, no additional carbon source, low sludge yield and remarkable effect. The anaerobic ammonia oxidation process realizes the separation of carbon and nitrogen pollutants, changes the sewage treatment process flow and is a core technology for the development of future water treatment.
The technological process based on the anaerobic ammonia oxidation technology has higher requirements on the stability of the short-cut nitrification. The stable operation of the shortcut nitrification is a sufficient condition for stable operation of the anaerobic ammonia oxidation, and the ammonia nitrogen and nitrite nitrogen substrates required by the growth of the anaerobic ammonia oxidation can be provided for the subsequent anaerobic ammonia oxidation only by the stable shortcut nitrification reaction. If the shortcut nitrification can not be realized, the anaerobic ammonia oxidation can not be realized, so that whether the shortcut nitrification reaction can be stably operated is the key of success or failure of the anaerobic ammonia oxidation technology. In the current research process of the low ammonia nitrogen wastewater anammox technology at home and abroad, whether the shortcut nitrification reaction is stable or not can not be accurately judged, and the shortcut nitrification can be damaged, so that the anammox bacteria can lose activity. For the problem, how to rapidly and accurately monitor the stability of the shortcut nitrification reaction, and to pre-judge the trend of the shortcut nitrification reaction and timely make process adjustment to prevent the shortcut nitrification from being damaged should be considered. Therefore, the research on the urban sewage short-cut nitrification effect prejudging device has extremely important research significance.
SUMMERY OF THE UTILITY MODEL
The stability of nitrifying to municipal sewage short cut among the prior art is judged in advance inadequately, the utility model aims to: the utility model provides a device is prejudged to municipal sewage short cut nitrification effect, should prejudge the device and have simple structure, reasonable in design, flexible and convenient, the precision is high, portable and safe and reliable's advantage of operation use.
In order to achieve the purpose, the utility model provides a municipal sewage shortcut nitrification effect prejudging device, which comprises an activated sludge detection system and a control and regulation system;
the activated sludge detection system comprises a heating water tank, an aeration tank, a medicament tank and an air pump;
a temperature control heating rod for heating water in the heating water tank, an underwater propeller for stirring and a heating water tank emptying valve which is connected with the bottom of the heating water tank and is used for emptying liquid in the heating water tank are arranged in the heating water tank;
the aeration tank is provided with a sampling port, the bottom of the aeration tank is provided with an aeration disc, and the aeration disc is connected with an aeration pipe;
the reagent pool comprises an acid reagent pool, an alkali reagent pool and an ammonia reagent pool, and is respectively connected with the acid reagent pool emptying valve, the alkali reagent pool emptying valve and the ammonia reagent pool emptying valve and used for emptying the liquid medicine in the reagent pool;
the air pump is connected with an aeration pipe at the bottom of the aeration tank through an air flow regulating valve;
the control and regulation system comprises a controller, a dosing pump and an online water quality monitoring probe arranged in the aeration tank;
the controller is respectively connected with the online water quality monitoring probe, the air quantity regulating valve and the dosing pump through signal wires; the dosing pump injects corresponding medicaments into the aeration tank through an acid adding pipe, an alkali adding pipe and an ammonia adding pipe respectively;
the monitoring indexes of the online water quality monitoring probe comprise: NH (NH)4 +Concentration of-N, NO3 -And the N concentration, the pH value and the dissolved oxygen are adjusted in real time through the controller according to the data returned by the online water quality monitoring probe, and the dosage of the dosing pump and the opening of the gas flow adjusting valve are adjusted.
Preferably, a gas flow meter is further arranged between the gas quantity regulating valve and the aeration pipe.
Preferably, the aeration tank is provided with a plurality of aeration tanks, and each aeration tank can independently operate.
Preferably, the number of the aeration tanks is 3.
Preferably, each aeration tank is provided with at least two sampling ports, at least one sampling port is positioned at the bottom of the aeration tank, and at least one sampling port is positioned at the top of the aeration tank.
Preferably, each aeration tank is provided with 4 sampling ports.
Preferably, the 4 sampling ports are uniformly distributed along the vertical axis direction of the aeration tank.
Preferably, the top of the acid medicament pool is provided with a one-way sealing cover.
Preferably, the top of the alkali agent pool is provided with a one-way sealing cover.
Preferably, the top of the ammonia medicament pool is provided with a one-way sealing cover.
The utility model has the advantages that:
the utility model discloses a device is judged in advance to short journey has simple structure, reasonable in design, flexible and convenient, the treatment effeciency is high, conveniently carries, the device operation is stable and advantages such as safe and reliable. The utility model discloses an in-process of short distance prejudgement device using, the accessible maintains an optimum environment that does benefit to nitrite oxidizing bacteria growth and detects its activity power, can be applicable to the activity detection of certain fungus crowd in the activated sludge, and process flow is simple, and control flexible operation, the degree of accuracy is high.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout the exemplary embodiments of the present invention.
Fig. 1 shows a schematic structural diagram of a municipal sewage shortcut nitrification effect prejudging device according to an embodiment of the present invention;
fig. 2 shows a schematic diagram of a right-view structure of a municipal sewage shortcut nitrification effect prejudging device according to an embodiment of the present invention;
fig. 3 is a schematic top view of a municipal sewage shortcut nitrification effect prediction device according to an embodiment of the present invention;
description of reference numerals: 1-a heating water tank, 2-an aeration tank, 3-an aeration disc and 4-an air pump; a 5-acid agent pool; 6-alkali agent pool, 7-ammonia agent pool, 8-dosing pump, 9-controller, 10-gas flow regulating valve, 11-gas flowmeter, 12-submerged propeller, 13-temperature control heating rod, 14-online water quality monitoring probe, 15-sampling port, 16-heating water tank emptying valve, 17-acid agent pool emptying valve, 18-alkali agent pool emptying valve, 19-ammonia agent pool emptying valve, 20-alkali adding pipe, 21-acid adding pipe, 22-ammonia adding pipe and 23-aeration pipe.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The utility model provides a municipal sewage shortcut nitrification effect prejudging device, which comprises an activated sludge detection system and a control and regulation system;
the activated sludge detection system comprises a heating water tank, an aeration tank, a medicament tank and an air pump;
a temperature control heating rod for heating water in the heating water tank, an underwater propeller for stirring and a heating water tank emptying valve which is connected with the bottom of the heating water tank and is used for emptying liquid in the heating water tank are arranged in the heating water tank;
the aeration tank is provided with a sampling port, the bottom of the aeration tank is provided with an aeration disc, and the aeration disc is connected with an aeration pipe;
the reagent pool comprises an acid reagent pool, an alkali reagent pool and an ammonia reagent pool, is respectively connected with the acid reagent pool emptying valve, the alkali reagent pool emptying valve and the ammonia reagent pool emptying valve and is used for emptying the liquid medicine in the reagent pool;
the air pump is connected with an aeration pipe at the bottom of the aeration tank through an air flow regulating valve;
the control and regulation system comprises a controller, a dosing pump and an online water quality monitoring probe arranged in the aeration tank;
the controller is respectively connected with the online water quality monitoring probe, the air quantity regulating valve and the dosing pump through signal wires; the dosing pump respectively injects corresponding medicaments into the aeration tank through the acid adding pipe, the alkali adding pipe and the ammonia adding pipe;
monitor of on-line water quality monitoring probeThe measurement indexes comprise: NH (NH)4 +Concentration of-N, NO3 -And the N concentration, the pH value and the dissolved oxygen are adjusted in real time through the controller according to the data returned by the online water quality monitoring probe, and the dosage of the dosing pump and the opening of the gas flow adjusting valve are adjusted.
Preferably, a gas flow meter is arranged between the gas quantity regulating valve and the aeration pipe.
Preferably, the aeration tank is provided with a plurality of aeration tanks, and each aeration tank can independently operate. In the actual operation process, the number of the aeration tanks is more preferably 3.
Preferably, each aeration tank is provided with at least two sampling ports, at least one sampling port is positioned at the bottom of the aeration tank, and at least one sampling port is positioned at the top of the aeration tank. More preferably 4 sampling ports, which are uniformly distributed along the vertical axis direction of the aeration tank.
Preferably, the top of the acid medicament pool is provided with a one-way sealing cover.
Preferably, a one-way sealing cover is arranged at the top of the alkali agent pool.
As the preferred scheme, the top of the ammonia medicament pool is provided with a one-way sealing cover.
The one-way sealing cover can ensure that the medicament does not overflow and can keep the air pressure in and out of the medicament pool consistent.
As a preferable scheme, the flow rate of the dosing pump is constant, and the dosing flow rates of the three liquid medicaments are 10-40mL/min, such as 20mL/min, relative to a 3L aeration tank.
The using method of the urban sewage short-cut nitrification effect prejudging device comprises the following steps:
1) filling water into the heating water tank, opening a temperature control heating rod and a submerged propeller, and adjusting the temperature control heating rod to be 26-30 ℃; adding a hydrochloric acid solution into an acid medicament pool, adding a sodium bicarbonate solution into an alkali medicament pool, and adding an ammonia bicarbonate solution into an ammonia medicament pool;
2) cleaning activated sludge to be detected with water, pouring the cleaned activated sludge into an aeration tank, and adding water to dilute the activated sludge to the highest water level line of the aeration tank;
3) opening a controller and an air pump, transmitting a monitoring value to the controller by an online water quality monitoring probe, adjusting the opening of an air quantity adjusting valve in real time after being processed by the controller, and conveying the air to a corresponding aeration disc through an aeration pipe to ensure that the DO value in the aeration tank is maintained between 2.5 and 3 mg/L; meanwhile, the controller firstly adds the medicament in the ammonia medicament pool into the aeration tank through the ammonia adding pipe by controlling the medicament adding pump, and then injects the medicament in the acid medicament pool or the alkali medicament pool into the aeration tank through the corresponding acid adding pipe and the corresponding alkali adding pipe by controlling the medicament adding pump according to the pH value measured by the online water quality monitoring probe, so that the pH value in the aeration tank is stabilized between 6.8 and 7.2;
4) under the control conditions, the aeration tank is maintained to continuously operate, and when NH is monitored by the online water quality monitoring probe4 +N concentration reduced to 0mg/L and total oxidation to NO3 -After N, the total time is measured as H;
5) when H is more than or equal to 18H, the reaction of the activated sludge is stable without changing operation parameters;
when H is more than or equal to 12 and less than 18H, the risk of short-range damage of the activated sludge is indicated, and the concentration of dissolved oxygen in the aeration tank needs to be reduced to avoid short-range damage;
when H is more than or equal to 6 and less than 12H, indicating that the short-range damage of the activated sludge occurs, reducing the concentration of dissolved oxygen in the aeration tank and increasing the sludge discharge amount of the system;
when H is less than 6H, the short-cut nitrification reaction of the system is judged to be damaged, the dissolved oxygen concentration of the aeration tank needs to be immediately reduced, the sludge discharge amount of the system is increased, and meanwhile, a nitrite oxidizing bacteria inhibitor is added into the system, so that the short-cut nitrification reaction of the system is recovered, and the stable short-cut nitrification reaction is realized.
Preferably, in the step 5), the reduction of the dissolved oxygen concentration in the aeration tank means that the dissolved oxygen concentration is reduced from 2.5-3mg/L to 1-1.5 mg/L.
Preferably, after the total time is measured, the method further comprises the following steps:
and closing all power supplies of the device, opening the heating water tank emptying valve, the sampling port, the acid medicament pool emptying valve, the alkali medicament pool emptying valve and the ammonia medicament pool emptying valve, releasing all the solution in the device, cleaning and closing all the valves.
Examples
The embodiment is providedFor a municipal sewage short-cut nitrification effect prejudging device, fig. 1 shows a structural schematic diagram of a municipal sewage short-cut nitrification effect prejudging device according to an embodiment of the utility model, fig. 2 shows a right-side structural schematic diagram of a municipal sewage short-cut nitrification effect prejudging device according to an embodiment of the utility model, fig. 3 shows a top-side structural schematic diagram of a municipal sewage short-cut nitrification effect prejudging device according to an embodiment of the utility model, as shown in fig. 1, fig. 2 and fig. 3, the municipal sewage short-cut nitrification effect prejudging device comprises an activated sludge detection system and a control regulation system; the activated sludge detection system comprises a heating water tank 1, an aeration tank 2, a medicament tank and an air pump 4; a temperature control heating rod 13 for heating water in the heating water tank 1, an underwater propeller 12 for stirring and a heating water tank emptying valve 16 which is connected with the bottom of the heating water tank 1 and is used for emptying liquid in the heating water tank 1 are arranged in the heating water tank 1; the aeration tank 2 is provided with a sampling port 15, the bottom of the aeration tank is provided with an aeration disc 3, and the aeration disc 3 is connected with an aeration pipe 23; the agent pool comprises an acid agent pool 5, an alkali agent pool 6 and an ammonia agent pool 7 which are respectively connected with an acid agent pool emptying valve 17, an alkali agent pool emptying valve 18 and an ammonia agent pool emptying valve 19 and used for emptying the liquid medicine in the agent pool; the air pump 4 is connected with an aeration pipe 23 at the bottom of the aeration tank 2 through an air quantity regulating valve 10; the control and regulation system comprises a controller 9, a dosing pump 8 and an online water quality monitoring probe 14 arranged in the aeration tank 2; the controller 9 is respectively connected with the online water quality monitoring probe 14, the air quantity regulating valve 10 and the dosing pump 8 through signal wires; the dosing pump 8 injects corresponding medicaments into the aeration tank 2 through an acid adding pipe 21, an alkali adding pipe 20 and an ammonia adding pipe 22 respectively; the monitoring indexes of the online water quality monitoring probe 14 include: NH (NH)4 +Concentration of-N, NO3 -The N concentration, the pH value and the dissolved oxygen are adjusted in real time through the controller 9 according to the data returned by the online water quality monitoring probe 14, and the dosage of the dosing pump 8 and the opening of the gas amount adjusting valve 10 are adjusted. A gas flowmeter 11 is also arranged between the gas quantity regulating valve 10 and the aeration pipe 23. 3 aeration tanks 2 are provided, and each aeration tank can independently operate. Each aeration tank 2 is provided with 4 sampling ports 15 which are uniformly distributed along the vertical axis direction of the aeration tank 2. Acid medicament pool 5The tops of the alkali agent tank 6 and the ammonia agent tank 7 are provided with one-way sealing covers (not shown).
In the embodiment, the length of the activated sludge detection system is designed to be 70cm, the length of the control and regulation system is 35cm, the length of the urban sewage shortcut nitrification effect prejudgment device is 105cm, the width of the urban sewage shortcut nitrification effect prejudgment device is 26cm, the diameter of each aeration tank 2 is 15cm, and the distance between every two aeration tanks 2 is 5 cm.
The using method comprises the following steps, wherein the dosage of each medicament is the dosage relative to the 3L aeration tank 2:
1) filling purified water into the heating water tank 1, opening the temperature control heating rod 13 and the submerged propeller 12, and adjusting the temperature control heating rod 13 to 28 ℃; adding 250mL of 30% hydrochloric acid solution into an acid agent pool 5, adding 250mL of 20g/L sodium bicarbonate solution into an alkali agent pool 6, and adding 250mL of 15g/L ammonium bicarbonate solution into an ammonia agent pool 7;
2) activated sludge to be detected (including heterotrophic bacteria, ammonia-salt-oxidizing bacteria, nitrite-oxidizing bacteria and phosphorus-accumulating bacteria) is taken and washed with purified water (standard: the ammonia nitrogen concentration of the washed sludge is less than 5mg/L), then the sludge is poured into an aeration tank 2, and then water is added to dilute the sludge to the highest water level (3L) of the aeration tank 2;
3) the controller 9 and the air pump 4 are opened, the monitoring value is transmitted to the controller 9 by the online water quality monitoring probe 14, the opening degree of the air quantity regulating valve 10 is adjusted in real time after being processed by the controller 9, and the gas is conveyed to the corresponding aeration disc 3 through the aeration pipe 23, so that the DO value in the aeration tank 2 is kept between 2.5 and 3 mg/L; meanwhile, the controller 9 controls the dosing pump 8 to firstly add 10mL of the medicament in the ammonia medicament pool 7 into the aeration tank 2 through the ammonia adding pipe 22, and then controls the dosing pump 8 to inject the medicament in the acid medicament pool 5 or the alkali medicament pool 6 into the aeration tank 2 through the corresponding acid adding pipe 21 and the corresponding alkali adding pipe 22 according to the pH value measured by the online water quality monitoring probe 14, so that the pH value in the aeration tank 2 is stabilized between 6.8 and 7.2;
4) under the control conditions, the aeration tank 2 is kept running continuously, and when NH is monitored by the online water quality monitoring probe 144 +N concentration reduced to 0mg/L and total oxidation to NO3 -After N, the total time is measured as H;
5) closing all power supplies of the device, opening a heating water tank emptying valve 16, a sampling port 15, an acid medicament pool emptying valve 17, an alkali medicament pool emptying valve 18 and an ammonia medicament pool emptying valve 19, releasing all the solution in the device, cleaning and closing all the valves;
6) when H is more than or equal to 18H, the reaction of the activated sludge is stable without changing operation parameters;
when H is more than or equal to 12 and less than 18H, the risk of short-range damage of the activated sludge is indicated, and the concentration of dissolved oxygen in the aeration tank 2 needs to be reduced to avoid short-range damage;
when H is more than or equal to 6 and less than 12H, indicating that the short-range damage of the activated sludge occurs, the concentration of dissolved oxygen in the aeration tank 2 needs to be reduced, and the sludge discharge amount of the system needs to be increased;
when H is less than 6H, the short-cut nitrification reaction of the system is judged to be damaged, the dissolved oxygen concentration of the aeration tank (2) needs to be immediately reduced, the sludge discharge amount of the system is increased, and meanwhile, a nitrite oxidizing bacteria inhibitor is added into the system, so that the short-cut nitrification reaction of the system is recovered, and the stable short-cut nitrification reaction is realized.
Wherein, in the step 5), the reduction of the dissolved oxygen concentration of the aeration tank means that the dissolved oxygen concentration is reduced from 2.5-3mg/L to 1-1.5 mg/L.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A municipal sewage short-cut nitrification effect prejudging device is characterized by comprising an activated sludge detection system and a control and regulation system;
the activated sludge detection system comprises a heating water tank (1), an aeration tank (2), a medicament tank and an air pump (4);
a temperature control heating rod (13) for heating water in the heating water tank (1), a submerged propeller (12) for stirring and a heating water tank emptying valve (16) which is connected with the bottom of the heating water tank (1) and is used for emptying liquid in the heating water tank (1) are arranged in the heating water tank (1);
the aeration tank (2) is provided with a sampling port (15), the bottom of the aeration tank is provided with an aeration disc (3), and the aeration disc (3) is connected with an aeration pipe (23);
the medicament pool comprises an acid medicament pool (5), an alkali medicament pool (6) and an ammonia medicament pool (7), which are respectively connected with an acid medicament pool emptying valve (17), an alkali medicament pool emptying valve (18) and an ammonia medicament pool emptying valve (19) and used for emptying the liquid medicament in the medicament pool;
the air pump (4) is connected with an aeration pipe (23) at the bottom of the aeration tank (2) through an air quantity regulating valve (10);
the control and regulation system comprises a controller (9), a dosing pump (8) and an online water quality monitoring probe (14) arranged in the aeration tank (2);
the controller (9) is respectively connected with the online water quality monitoring probe (14), the air quantity regulating valve (10) and the dosing pump (8) through signal wires; the dosing pump (8) injects corresponding medicaments into the aeration tank (2) through an acid adding pipe (21), an alkali adding pipe (20) and an ammonia adding pipe (22) respectively;
the monitoring indexes of the online water quality monitoring probe (14) comprise: NH (NH)4 +Concentration of-N, NO3 -The N concentration, the pH value and the dissolved oxygen are adjusted in real time through the controller (9) according to data returned by the online water quality monitoring probe (14) and the dosage of the dosing pump (8) and the opening degree of the gas amount adjusting valve (10).
2. The urban sewage shortcut nitrification effect prejudging device of claim 1, wherein a gas flow meter (11) is further arranged between the gas amount regulating valve (10) and the aeration pipe (23).
3. The municipal sewage shortcut nitrification effect prejudging device according to claim 1, wherein the number of the aeration tanks (2) is plural, and each aeration tank can be operated independently.
4. The municipal sewage shortcut nitrification effect prejudging device according to claim 3, wherein the number of the aeration tanks (2) is 3.
5. The municipal sewage shortcut nitrification effect prejudging device according to claim 1, wherein each aeration tank (2) is provided with at least two sampling ports (15), at least one sampling port is located at the bottom of the aeration tank (2), and at least one sampling port is located at the top of the aeration tank (2).
6. The municipal sewage short-cut nitrification effect prejudging device according to claim 5, wherein each aeration tank (2) is provided with 4 sampling ports (15).
7. The municipal sewage short-cut nitrification effect prejudging device according to claim 6, wherein 4 sampling ports (15) are uniformly distributed along the vertical axis direction of the aeration tank (2).
8. The municipal sewage short-cut nitrification effect prejudging device according to claim 1, wherein a one-way sealing cover is arranged at the top of the acid agent tank (5).
9. The urban sewage short-cut nitrification effect prejudging device according to claim 1, wherein a one-way sealing cover is arranged at the top of the alkali agent tank (6).
10. The urban sewage short-cut nitrification effect prejudging device according to claim 1, wherein a one-way sealing cover is arranged at the top of the ammonia agent tank (7).
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