CN212198721U - Short-cut nitration reaction device - Google Patents
Short-cut nitration reaction device Download PDFInfo
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- CN212198721U CN212198721U CN201922275497.9U CN201922275497U CN212198721U CN 212198721 U CN212198721 U CN 212198721U CN 201922275497 U CN201922275497 U CN 201922275497U CN 212198721 U CN212198721 U CN 212198721U
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Abstract
The utility model relates to a sewage treatment field, concretely relates to short distance nitration device. The short-cut nitration reaction device comprises: a sewage pH adjusting component provided with a sewage water inlet and a dissolved oxygen adjusting component communicated with the sewage pH adjusting component, wherein the dissolved oxygen adjusting component comprises a reactor with air permeability, the reactor is in a hollow tubular shape, and the cross section area of the reactor is less than or equal to 40mm along the flowing direction of sewage2Wall of the reactorThe thickness is less than or equal to 2 mm; or the reactor is hollow plate-shaped, the distance between the plates is 1-6mm along the flowing direction of sewage, and the plate thickness is less than or equal to 4 mm. Through presetting the pH value of sewage, input sewage to the reactor again, can reduce the control and the regulation number of times to the short distance nitration pH value, can control dissolved oxygen concentration through the velocity of flow of control sewage in the reactor, reduced the degree of difficulty that realizes the short distance nitration.
Description
Technical Field
The utility model relates to a sewage treatment field, concretely relates to short distance nitration device.
Background
In recent years, with the continuous improvement of industrialization and urbanization, a large amount of nutrient substances such as nitrogen enter a water body, and the phenomenon of water body eutrophication is increasingly serious. Therefore, how to remove the nutrients in the sewage efficiently, economically and in an energy-saving manner has been the focus of research on sewage treatment technology.
Nitrifying bacteria are chemolithotrophic bacteria and mainly comprise Ammonia Oxidizing Bacteria (AOB) and Nitrite Oxidizing Bacteria (NOB), wherein the AOB is mainly used for converting ammonia nitrogen into nitrite nitrogen, and the NOB is used for converting the nitrite nitrogen into nitrate nitrogen. The biological method for treating ammonia nitrogen sewage by using nitrobacteria is widely applied due to the advantages of good treatment effect, high environmental friendliness, low treatment cost and the like. Generally, the biological method for treating ammonia nitrogen sewage mainly comprises a nitrification-denitrification technology, a short-cut nitrification/anaerobic ammonia oxidation technology and the like, wherein the short-cut nitrification/denitrification technology and the short-cut nitrification/anaerobic ammonia oxidation technology have better effects of energy conservation, economy, environmental friendliness and the like than the nitrification-denitrification technology, so that the biological method becomes the sewage denitrification technology with the most prospect in the future.
The basic principle of the shortcut nitrification/denitrification technology and the shortcut nitrification/anaerobic ammonia oxidation technology is to control the biological nitrification process at the ammonia oxidation stage, and then directly carry out shortcut denitrification or anaerobic ammonia oxidation reaction, thereby achieving the purposes of saving energy, reducing consumption and additional organic matters. Therefore, the shortcut nitrification is a key link for realizing the shortcut nitrification/denitrification technology and the shortcut nitrification/anaerobic ammonia oxidation technology.
If AOB is used as a strain for pure culture, the short-cut nitrification process is easy to realize, but in the actual sewage treatment process, the AOB pure culture process is not economically feasible, so how to effectively control the competition between AOB and NOB in the ammonia nitrogen nitrification process makes AOB become a dominant bacterium, and the accumulation of stably obtained nitrite nitrogen becomes the key of the short-cut nitrification process.
Because the environment suitable for the growth of AOB and NOB is different, for example, the suitable growth pH of AOB is around 8.0, the suitable growth pH of NOB is around 7.0, and under low dissolved oxygen conditions, the AOB has stronger affinity for dissolved oxygen than NOB, etc., the shortcut nitrification technology generally controls the operating conditions of pH, temperature, dissolved oxygen content, sludge age, free ammonia, free nitrous acid, etc. in the reaction process to effectively control the competition between AOB and NOB, so that AOB becomes dominant bacteria, thereby obtaining the accumulation of nitrite.
In the prior art, for controlling the pH value and the dissolved oxygen content, a dissolved oxygen concentration detector, a pH value detector, a fan, an aerator, a conditioning tank, a controller and other devices are usually arranged in a sewage tank, the dissolved oxygen concentration and the pH value in the sewage tank are detected in real time, the controller is used for controlling the on and off of the fan so as to adjust the dissolved oxygen concentration, the controller is used for controlling the on and off of the conditioning tank so as to adjust the pH value, more detecting instruments and more control devices are required to be arranged in the adjusting process, and the control method is complex.
Disclosure of Invention
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the process of adjusting dissolved oxygen concentration and pH among the prior art and need set up more detecting instrument and controlgear, leads to the complicated defect of control method to a short distance nitration reaction device is provided.
In order to solve the technical problem, the utility model discloses a technical scheme does:
a shortcut nitrification reaction apparatus, comprising:
the sewage pH adjusting component is provided with a sewage inlet and is used for pre-adjusting the pH of the sewage;
the dissolved oxygen adjusting assembly is communicated with the sewage pH adjusting assembly and is used for adjusting the concentration of the dissolved oxygen, the dissolved oxygen adjusting assembly comprises a plurality of reactors made of air-permeable materials, and the inner walls of the reactors are used for allowing microorganisms to adhere and grow;
the reactor is a hollow tubular structure, and the cross section area of the reactor is less than or equal to 40mm in the sewage flowing direction2The wall thickness of the reactor is less than or equal to 2 mm;
or the reactor is a hollow plate-shaped structure, the distance between plates is 1-6mm, and the thickness of the plate is 1-4mm along the flowing direction of sewage.
Further, the breathable material is silicon rubber.
Further, the sewage pH adjusting assembly comprises:
the sewage adjusting water tank is provided with a sewage inlet;
the medicine storage box is communicated with the sewage adjusting water tank and is used for loading alkali liquor or acid liquor for adjusting the pH value of the mixed liquor;
and the first valve is arranged at the water outlet of the medicine storage box and used for controlling the water outlet of the medicine storage box.
Further, first valve is the electrovalve, sewage pH adjusting part still includes:
the pH monitor is arranged in the sewage adjusting water tank;
and the controller is simultaneously electrically connected with the pH monitor and the first valve and is used for controlling the opening and closing of the first valve through a signal detected by the pH monitor.
Further, the sewage pH adjusting assembly also comprises a stirrer.
Furthermore, the short-cut nitrification reaction device also comprises a reflux pump, and the reflux pump is used for refluxing the part of the activated sludge falling off from the reactor into the reactor.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a short distance nitration reaction unit, through setting up sewage pH adjusting part and dissolved oxygen control assembly, wherein, dissolved oxygen control assembly includes a plurality of reactors that have the gas permeability, when the short distance is nitrified, the microorganism is attached to on the inner wall of reactor and grows, prescribe a limit to through the specification to the reactor, along with the consumption of microorganism to oxygen and the dissolved action of oxygen in aqueous, can form the concentration difference in the reactor inside and outside, thereby make the oxygen in the air under the effect of concentration difference, can follow the reactor outside and see through naturally and get into to the reactor inboardly, thereby nitrify the oxygen suppliment to the short distance in the reactor. Compared with the prior art, the utility model discloses only need the velocity of flow of control sewage in the reactor can realize the regulation to dissolved oxygen concentration, control method is simple and convenient easy operation. On the other hand, the sewage flows in the reactor unidirectionally, and the pH drop of the acid produced in the short-cut nitrification process does not influence the progress of the short-cut nitrification reaction. The utility model discloses a pH value to sewage is adjusted in advance, carries sewage to dissolved oxygen regulation subassembly again and carries out biochemical reaction, need not control pH again on the dissolved oxygen subassembly to can reduce the control and the regulation number of times to pH value, and then reduce the regulation degree of difficulty of short distance nitration in-process pH value, reduce the degree of difficulty that realizes short distance nitration. Additionally, the utility model discloses in owing to do not need mechanical equipment such as fan, aerator just can realize the transport and the infiltration of oxygen, saved sewage treatment's equipment cost and running cost, owing to need not compensate the short distance nitration process's the acid production, saved the alkali lye volume of pH regulation, also further reduced sewage short distance nitration's cost.
2. The utility model provides a dissolved oxygen regulating assembly through setting up the reactor into the silicon rubber pipe, and on the one hand, the oxygen permeability of silicon rubber material can form the environment of low dissolved oxygen concentration in the reactor to be favorable to the growth of nitrite bacteria, on the other hand, silicon rubber have good biocompatibility, are favorable to the microorganism to form the biomembrane on the pipe wall, thereby are favorable to going on of sewage biochemical treatment.
3. The utility model provides a short distance nitration device, through setting up sewage pH adjusting part into including sewage adjusting water tank, explosive box and first valve, in sewage treatment process, sewage is at first carried to sewage adjusting water tank in, through opening first valve, thereby it realizes the regulation of pH to make alkali lye or acidizing fluid of storage in the explosive box carried to sewage adjusting water tank in, then sewage is carried to carrying out biochemical reaction in the dissolved oxygen adjusting part again, the in-process of biochemical reaction carries out the regulation of dissolved oxygen content through the velocity of flow of control sewage in the reactor, the method is simple easily implemented.
4. The utility model provides a short distance nitration reaction unit, through set up pH monitor and controller in sewage pH adjusting part, the controller is connected with pH monitor and first valve electricity simultaneously, through the pH monitor in the monitoring sewage regulating water tank pH value of mixed liquid and with the signal transmission who detects for the controller, when the pH value that detects is less than the first default in the controller, the first valve of controller control is opened, thereby make alkali lye carried to carry out the regulation of pH value in the sewage regulating water tank, when the pH value that detects is higher than the second default in the controller, the first valve of controller control is closed, thereby realize the automatically regulated of the pH value in the sewage regulating water tank, and is simple and convenient high-efficient.
5. The utility model provides a short distance nitration device through set up the agitator in sewage pH adjusting part, makes alkali lye and mixed liquid can mix more evenly under the effect of agitator to be favorable to the regulation of pH value in the sewage adjusting water tank.
6. The utility model provides a short distance nitration reaction unit can compensate the microorganism of loss in the sewage treatment process through the backwash pump to make short distance nitration reaction can go on more stably, in addition, carry out recycle to activated sludge, thereby further saved the cost of sewage short distance nitration processing.
7. The utility model provides a short distance nitration of sewage technology controls at 15 minutes-6 hours through the water conservancy dwell time with sewage in the reactor, can realize growing for suitable AOB with the dissolved oxygen concentration control in the reactor to obtain the accumulation of required nitrite nitrogen, and then realize the short distance nitration technology of sewage.
8. The utility model provides a sewage short cut nitrification technology sets up the pH value through nitrifying the short cut into water to 8-9, and this pH value is suitable for AOB's growth to be favorable to AOB's competition, be favorable to going on of sewage short cut nitrification reaction.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a short-cut nitrification reactor in example 1 of the present invention;
reference numerals:
1. a reactor; 2. a sewage pH adjusting component; 21. a sewage regulating water tank; 22. a medicine storage box; 23. a pH detector; 3. a sedimentation tank; 4. a peristaltic pump; 5. a sewage inlet tank; 6. a reflux pump.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the following embodiments are provided for better understanding of the present invention, not limited to the best mode, and not for the limitation of the content and the protection scope of the present invention, and any product identical or similar to the present invention, obtained by combining the features of the present invention with other prior art, or any product in the teaching of the present invention, falls within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
Example 1
As shown in FIG. 1, the embodiment relates to a short distance nitration reaction device, which comprises a sewage pH adjusting component 2 and a dissolved oxygen adjusting component.
The sewage water inlet is seted up on sewage pH adjusting part 2, thereby sewage pH adjusting part 2 is used for adjusting the pH value of sewage and is suitable for nitrosation bacterium's existence, dissolved oxygen adjusting part and sewage pH adjusting part 2 switch-on, and dissolved oxygen adjusting part is used for the oxygen suppliment and adjusts the dissolved oxygen concentration in the mixed liquid to provide the place for the biochemical treatment of sewage.
Wherein, sewage is carried to sewage pH adjusting assembly 2 in from sewage intake case 5, and sewage pH adjusting assembly 2 includes sewage regulating tank 21, explosive box 22 and first valve (not shown in the figure), and wherein, the sewage water inlet sets up on sewage regulating tank 21, and the explosive box 22 is stored with alkali lye or acidizing fluid that are used for adjusting sewage pH value, and first valve setting is in the delivery port department of explosive box 22, and first valve is used for controlling the delivery of explosive box 22.
When sewage is treated, firstly, the sewage is conveyed into the sewage adjusting water tank 21, the pH detector 23 starts to work, when the pH value is detected to be not accordant with the preset value, the first valve is opened, so that alkali liquor or acid liquor is conveyed into the sewage adjusting water tank 21, the alkali liquor or the acid liquor and the sewage are mixed in the sewage adjusting water tank 21, the pH value of the mixed liquor is adjusted, and when the pH value in the sewage adjusting water tank 21 is adjusted to the preset value, the first valve is closed.
For the automatically regulated who realizes pH value, in this embodiment, set up first valve into the electrovalve, still include pH monitor and controller (not shown in the figure) in the sewage pH adjusting part 2, the pH monitor sets up in the sewage adjusting water tank 21 for the liquid pH value in the real-time supervision sewage adjusting water tank 21, controller and pH monitor and first valve electricity are connected simultaneously, and the controller is used for passing through the signal control that the pH monitor detected the opening and close of first valve.
The signal transmission that the pH monitor will detect gives the controller, when the pH value that detects is less than the first default in the controller, the first valve of controller control is opened to make alkali lye carry out the regulation of pH value in being carried to sewage adjusting water tank 21, when the pH value that detects is higher than the second default in the controller, the first valve of controller control is closed, thereby realizes the automatically regulated of the pH value in the sewage adjusting water tank 21, and is simple and convenient high-efficient.
In order to make the alkali liquor or the acid liquor and the mixed liquor mixed more fully, the sewage pH adjusting assembly is arranged to further comprise a stirrer (not shown in the figure), and the stirrer is used for stirring the alkali liquor and the mixed liquor or the acid liquor and the mixed liquor.
Specifically, the dissolved oxygen regulating assembly comprises a plurality of reactors 1 with air permeability, and the inner walls of the reactors 1 are used for the attachment and growth of microorganisms so as to carry out the biological treatment of sewage.
In this embodiment, the number of the reactors 1 is one, in other embodiments, the number of the reactors 1 can be adjusted by the amount of the sewage to be treated, it should be noted that, when the number of the reactors 1 is two or more, a water distributor may be disposed at the inlet of the reactor 1, and the water distributor is connected to the plurality of reactors 1 at the same time, so that the mixed liquid can be uniformly distributed in each reactor 1, thereby facilitating the uniform control of the reactors 1.
In the practical example, the reactor 1 may be a hollow tubular structure or a hollow plate-like structure, the shape of which is not limited, but when the reactor 1 is a hollow tubular structure, the cross-sectional area of the reactor 1 in the direction along which wastewater flows is 40mm or less2The wall thickness of the reactor 1 is less than or equal to 2 mm; when the reactor 1 is a hollow plate-shaped structure, the distance between plates is 1-6mm along the flowing direction of sewage, and the wall thickness is less than or equal to 4 mm. The material of the reactor 1 is selected to have good oxygen permeability, such as silicone rubber or glassy polymer (TMSP).
In this example, the reactor 1 was a hollow tubular silicone rubber tube, and the reactor 1 had an inner diameter of 2mm, an outer diameter of 4mm, a wall thickness of 1.0mm and a length of 1500 mm. The reactor 1 is shaped as a hollow tube, which facilitates its production; the reactor 1 adopts a silicon rubber tube, on one hand, the oxygen permeability of the silicon rubber material can ensure that the nitration reaction is in an environment with low dissolved oxygen concentration, thereby being beneficial to the growth of nitrite bacteria, and on the other hand, the silicon rubber has good biocompatibility, thereby being beneficial to microorganisms to form a biomembrane on the tube wall, and further being beneficial to the implementation of the biochemical treatment of sewage; the reactor 1 is designed to achieve the optimum oxygen permeation.
In the present embodiment, a reflux pump 6 is further provided in the shortcut nitrification reactor, and the reflux pump 6 is used to reflux a part of the activated sludge dropped from the reactor 1 into the reactor 1. The microorganisms lost in the biochemical process can be compensated for by the reflux pump 6. It should be noted that the water outlet end of the short-cut nitrification reactor is usually connected to the sedimentation tank 3 to collect the sewage after the short-cut nitrification treatment and the microorganisms lost from the reactor 1, in this embodiment, the reflux pump 6 is connected to the sedimentation tank 3, and the reflux pump 6 is used to reflux a part of the sludge collected in the sedimentation tank 3 to the reactor 1.
The principle of use of this embodiment is generally as follows:
when carrying out short distance nitration to sewage, at first inoculate activated sludge, then adjust the pH value of sewage, at last let sewage in to dissolve in the oxygen control assembly and carry out short distance nitration, through setting up sewage pH adjusting part 2 and dissolved oxygen control assembly, wherein, dissolved oxygen control assembly includes a plurality of reactors 1 that have gas permeability, when short distance nitration, the microorganism adheres to and grows on the inner wall of reactor 1, through prescribing a limit to the specification of reactor 1, along with the consumption of microorganism to oxygen and the dissolved action of oxygen in the aquatic, can form concentration difference in the reactor 1 inside and outside, thus make the oxygen in the air under the effect of concentration difference, can permeate naturally and enter to the reactor 1 inboard from the reactor 1 outside, thus to short distance nitration in the reactor 1 and supply oxygen, compare with prior art, the utility model discloses only need to control the velocity of flow of mixed liquid in the reactor 1 and can realize the regulation to dissolved oxygen concentration, control method simple prescription is convenient and easy to operate, on the other hand, because sewage is one-way flow in reactor 1, consequently the process that short distance nitration can not be influenced to the acid production in biochemical process, the utility model discloses a adjust the pH value of sewage in advance, carry sewage to dissolved oxygen again and carry out biochemical reaction in adjusting the subassembly, need not control pH again on the dissolved oxygen subassembly to can reduce the control and the regulation number of times to pH value, and then reduce the regulation degree of difficulty of short distance nitration in-process pH value, reduce the degree of difficulty that realizes short distance nitration. Additionally, the utility model discloses in owing to do not need mechanical equipment such as fan, aerator just can realize the transport and the infiltration of oxygen, saved sewage treatment's equipment cost and running cost, owing to need not compensate the acid production of biochemical process, saved the alkali lye volume of pH regulation, further reduced the cost of sewage short distance nitration.
Test example 1
The experimental example relates to a sewage shortcut nitrification process, which comprises the steps of inoculating activated sludge in the shortcut nitrification reaction device provided in the example 1, and then introducing sewage for shortcut nitrification. Wherein, the hydraulic retention time of the sewage in the reactor is controlled to be 40 minutes, and the pH value of the sewage entering the reactor is controlled to be 8.5.
Specifically, in this embodiment, the wastewater to be treated is prepared from ammonium sulfate and tap water, NH4 +The concentration of N was 120mg/L and the pH was 8.5. The activated sludge is mixed sludge of a Ganzhou water west sewage treatment plant as inoculated sludge of a reactor, and the concentration of the activated sludge is 2300 mg/L.
The sewage is conveyed to a short-distance nitration reaction device by a peristaltic pump for biochemical reaction, and the hydraulic retention time of the sewage in the reactor is 40 min.
And (3) processing results: good short-cut nitrification effect can be obtained after 10 days of starting, and NO is discharged from the reaction device2 --N concentration of 70mg/L to 75mg/L, NH4 +The concentration of N is 36mg/L-44mg/L, and the Nitrosomonas is the main enriched ammonia oxidizing bacteria, and the relative abundance of the Nitrosomonas is increased from 0.08% to 75% by detecting the biofilm in the reactor.
After the short-cut nitrification treatment of the sewage is completed, the sewage can be introduced into the short-cut denitrification reactor or the anaerobic ammonia oxidation reactor to perform the short-cut nitrification reaction or the anaerobic ammonia oxidation reaction, so that the denitrification treatment of the sewage is completed.
Test example 2
The experimental example relates to a sewage shortcut nitrification process, which comprises the steps of inoculating activated sludge in the shortcut nitrification reaction device provided in the example 1, and then introducing sewage for shortcut nitrification. Wherein the hydraulic retention time of the sewage in the reactor is controlled to be 30 minutes, and the pH value of the sewage entering the reactor is controlled to be 8.5.
Specifically, in this embodiment, the wastewater to be treated is prepared from ammonium sulfate and tap water, NH4 +The concentration of N was 80mg/L and the pH was 8.5. The activated sludge is mixed sludge of a Ganzhou water west sewage treatment plant as inoculated sludge of a reactor, and the concentration of the activated sludge is 2300 mg/L.
The sewage is conveyed to a short-distance nitration reactor by a peristaltic pump for biochemical reaction, and the hydraulic retention time of the sewage in the reactor is 30 min.
And (3) processing results: good short-cut nitrification effect can be obtained after 10 days of starting, and NO is discharged from the reaction device2 -NH with a concentration of-N of 42mg/L to 48mg/L4 +The concentration of N is 30mg/L-35mg/L, and the Nitrosomonas is a main enriched ammonia oxidizing bacterium detected by a biofilm in the reactor, and the relative abundance of the Nitrosomonas is increased from 0.08% to 74%.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (6)
1. A short-cut nitrification reaction apparatus, comprising:
the sewage pH adjusting component (2) is provided with a sewage inlet and is used for pre-adjusting the pH of the sewage;
and a dissolved oxygen adjusting component which is communicated with the sewage pH adjusting component (2) and is used for adjusting the concentration of the dissolved oxygen, the dissolved oxygen adjusting component comprises a plurality of reactors (1) made of air-permeable materials, the inner wall of each reactor (1) is used for the attachment and growth of microorganisms,
the reactor (1) is a hollow tubular structure, and the cross section area of the reactor (1) is less than or equal to 40mm in the sewage flowing direction2The wall thickness of the reactor (1) is less than or equal to 2 mm;
or the reactor (1) is of a hollow plate-shaped structure, the distance between plates is 1-6mm, and the thickness of the plate is 1-4mm along the flowing direction of sewage.
2. The short-cut nitrification reaction apparatus according to claim 1, wherein the gas-permeable material is silicone rubber.
3. The shortcut nitrification reaction apparatus according to claim 1 or 2, wherein the wastewater pH adjusting means (2) comprises:
a sewage adjusting water tank (21) which is provided with a sewage inlet;
the medicine storage box (22) is communicated with the sewage adjusting water tank (21) and is used for loading alkali liquor or acid liquor for adjusting the pH value of the mixed liquor;
and the first valve is arranged at the water outlet of the medicine storage box (22) and used for controlling the water outlet of the medicine storage box (22).
4. The shortcut nitrification reactor of claim 3, wherein said first valve is an electric valve, and said wastewater pH adjusting means further comprises:
the pH monitor is arranged in the sewage adjusting water tank (21);
and the controller is simultaneously electrically connected with the pH monitor and the first valve and is used for controlling the opening and closing of the first valve through a signal detected by the pH monitor.
5. The shortcut nitrification reactor of claim 4, wherein the wastewater pH adjustment component further comprises an agitator.
6. The shortcut nitrification reactor according to claim 1, further comprising a reflux pump (6), wherein the reflux pump (6) is used for refluxing a portion of the activated sludge fallen from the reactor (1) into the reactor (1).
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