CN212476266U - Anaerobic ammonia oxidation sewage autotrophic denitrification device based on pulse aeration - Google Patents

Anaerobic ammonia oxidation sewage autotrophic denitrification device based on pulse aeration Download PDF

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CN212476266U
CN212476266U CN202021473371.9U CN202021473371U CN212476266U CN 212476266 U CN212476266 U CN 212476266U CN 202021473371 U CN202021473371 U CN 202021473371U CN 212476266 U CN212476266 U CN 212476266U
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aeration
sewage
reaction tank
monitor
ammonia oxidation
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吴毅晖
吴光学
潘国强
林阳
郭昉
华锐
李天乐
马方
欧阳兆丰
李连伟
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Kunming Dianchi Water Co ltd
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Kunming Dianchi Water Co ltd
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Abstract

The utility model provides an anaerobic ammonia oxidation sewage autotrophic denitrification device based on pulse aeration, relating to the technical field of sewage treatment. The anaerobic ammonia oxidation denitrification device based on pulse aeration comprises: a pulse aeration control system, a nitrosation reaction system and an anaerobic ammonia oxidation reaction system; the pulse aeration control system comprises: autonomous system and NH connected to the autonomous system4 +Monitor, DO monitor, NO2‑N/NO3-N integrated monitors; the nitrosation reaction system includes: a nitrosation reaction tank, an aeration disc, a gas flow regulating valve, a fan and a gas pipe; the anaerobic ammonia oxidation reaction system comprises: anaerobic ammoxidation reactionThe device comprises a pool, a stirrer, a sludge discharge pipe, a water outlet pipe, an exhaust pipe and a heating device; the automatic control system is also connected with the air flow regulating valve and the fan; the automatic control system is used for controlling the flow of NH4 +、NO2‑N/NO3N, DO, and controlling NH in the sewage in the nitrosation reaction tank by controlling the aeration rate of the aeration disc by controlling the air flow regulating valve and/or the fan4 +And NO2-concentration ratio of N.

Description

Anaerobic ammonia oxidation sewage autotrophic denitrification device based on pulse aeration
Technical Field
The utility model relates to a sewage treatment technical field especially relates to an anaerobic ammonium oxidation sewage autotrophic denitrification device based on pulse aeration.
Background
The anaerobic ammonia oxidation (Anammox) process has a wide application prospect in the field of biological denitrification of wastewater due to the advantages of high efficiency and low consumption. The reaction principle of the Anammox process is to control the nitration process in a short-cut nitration stage and to nitrify the generated NO2 --N and remaining NH4 +-N is metabolically reduced to N by Anammox2. Based on this reaction principle, the Anammox process can be divided into a separation process and an integrated process. Separate processes, e.g. Sharon-Anamox process, for shortcut nitration and Anammox the reactions are respectively carried out in different reactors; an integrated process, such as a canon (complex automatic reagent removal over nitrate) process, allows the shortcut nitrification and the Anammox reaction to be carried out in the same reactor by controlling the conditions of DO (dissolved oxygen) and the like.
In recent years, many processes based on the Anammox reaction have been continuously studied and applied. For example, the Anammox reaction is applied to antibiotic-containing wastewater, landfill leachate, pharmaceutical wastewater, anaerobic digester effluent, pig-raising plant wastewater, and the like. Enrichment of Anammox bacteria is mainly realized by immobilized technologies such as granular sludge or biological membranes under the conditions of high water inflow load and high temperature. The related technology shows that the main factors influencing the anaerobic ammonia oxidation reaction include temperature, ammonia nitrogen and nitrite concentration and dissolved oxygen, and NH in the anaerobic ammonia oxidation reaction4 +-N : NO2 --N : NO3 -The proportion of-N is 1:1.31:0.22, and the NO content in the effluent of the anaerobic ammonia oxidation reaction is 100mg/L2 -N completely inhibits the activity of Anammox, but NO2 -After complete removal of-N, the Anammox activity can be fully restored, that is, the Anammox bacteria are reversibly inhibited. In the practical integrated Anammox process flow, NH in the reaction is caused due to slow growth rate of Anammox bacteria and large fluctuation of water inlet4 +-N : NO2 --N : NO3 -The proportion relation of-N is difficult to maintain at 1:1.31:0.22, the microorganism has inhibition effect on the functioning microorganism, and the treatment of sewage with large fluctuation in a low ammonia nitrogen municipal sewage system is the main technical difficulty of the application.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an anammox sewage autotrophic denitrification device based on pulse aeration can solve NH among the anammox technology4 +-N : NO2 -The proportional relation of-N is difficult to maintain.
In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:
the embodiment of the application provides anaerobic ammonia oxidation sewage based on pulse aerationAn autotrophic nitrogen removal device, comprising: a pulse aeration control system, a nitrosation reaction system and an anaerobic ammonia oxidation reaction system; the pulse aeration control system comprises: autonomous system and NH connected to the autonomous system4 +Monitor, DO monitor, NO2-N/NO3-N integrated monitors; the nitrosation reaction system includes: a nitrosation reaction tank, an aeration disc, a gas flow regulating valve, a fan and a gas pipe; the aeration disc is positioned in the nitrosation reaction tank and is connected with the fan through the air pipe, and the air quantity regulating valve is arranged on the air pipe; the anaerobic ammonia oxidation reaction system comprises: the anaerobic ammonia oxidation reaction tank, the stirrer, the sludge discharge pipe, the water outlet pipe, the exhaust pipe and the heating device; the anaerobic ammonia oxidation reaction tank is communicated with the nitrosation reaction tank; the NH4 +Monitor, DO monitor, NO2-N/NO3-N integrated monitors are positioned in the nitrosation reaction tank and are respectively used for monitoring NH in the sewage of the nitrosation reaction tank4 +、DO、NO2-N/NO3-detecting the concentration of N; the automatic control system is also connected with the air quantity regulating valve and the fan; the automatic control system is used for controlling the NH according to the NH4 +Monitor, NO2-N/NO3-N integrated monitor, NH detected by said DO monitor4 +、NO2-N/NO3N, DO, and controlling NH in the sewage in the nitrosation reaction tank by controlling the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc4 +And NO2-concentration ratio of N.
By adopting the anaerobic ammonia oxidation sewage autotrophic nitrogen removal device, NH in a nitrosation reaction tank is treated by a pulse aeration control system4 +、DO、NO2-N/NO3The concentration of-N is monitored and is dependent on NH4 +、DO、NO2-N/NO3The concentration of N controls the air flow regulating valve and/or the fan to regulate the aeration rate of the aeration disc, and the N of the sewage in the nitrosation reaction tank is subjected to alternate operation of aerobic/anoxic pulsesH4 +And NO2The molar concentration ratio of N to N is controlled to quickly start the Anammox reaction, effectively shorten the reaction time, increase the impact load resistance of the anaerobic ammoxidation reactor, realize the short-cut nitrification denitrification without adding a carbon source and ensure the effluent quantity and the water quality stability of the sewage; namely, NH in the anaerobic ammonia oxidation process in the prior art is avoided4 +-N : NO2 --N : NO3 -The proportional relation of-N is difficult to maintain, and various disadvantages are caused.
In some possible embodiments, the nitrosation reaction system further comprises an air flow meter and a pressure sensor; the air flow meter and the pressure sensor are arranged on the air pipe, and the air flow meter and the pressure sensor are connected with the automatic control system.
In some possible embodiments, the controlling NH in the wastewater in the nitrosation reaction tank4 +And NO2-a concentration ratio of N comprising: controlling NH in the sewage in the nitrosation reaction tank4 +And NO2The molar concentration ratio of-N is 0.65:1 to 1: 1.35.
In some possible embodiments, the autonomous system is configured to determine the NH based on the NH4 +Monitor, NO2-N/NO3-N integrated monitor, NH detected by said DO monitor4 +、NO2-N/NO3N, DO, and controlling the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc, comprising: the automatic control system is in NH4 +With NO2When the molar concentration ratio concentration of N is more than 1:1.35, controlling the air quantity regulating valve and/or the fan to increase the aeration quantity of the aeration disc; the automatic control system is in NH4 +With NO2At a molar concentration of N less than 0.65:1, or, NO3Molar concentration of-N over NO2When the molar concentration of N is higher than the preset DO value, or the rising speed of the DO concentration exceeds the preset DO value, the air flow regulating valve and/or the fan are controlled to reduce the aeration of the aeration discAmount of the compound (A).
The embodiment of the application also provides an anaerobic ammonia oxidation sewage autotrophic nitrogen removal method based on pulse aeration, which comprises the following steps:
sewage enters a nitrosation reaction tank through a water inlet pipe, an aeration disc in a pulse aeration mode is adopted to aerate the sewage, nitrosation reaction treatment is carried out on the sewage, and ammonia nitrogen in the sewage is oxidized into nitrite nitrogen; NH to the sewage in the nitrosation reaction tank4 +、DO、NO2-N、NO3The concentration of-N is detected separately and is dependent on the detected NH4 +、DO、NO2-N、NO3-N concentration, adjusting the aeration rate of the aeration disc, and controlling NH in the sewage of the nitrosation reaction tank4 +And NO2The molar concentration ratio of-N is 0.65:1 to 1: 1.35; the sewage treated by the nitrosation reaction enters an anaerobic ammonia oxidation reaction tank from the nitrosation reaction tank, the sewage is heated to 25-35 ℃ at the water inlet through a heating device, the dissolved oxygen is controlled below 0.1mg/L, and NO in the sewage2-N and NH4 +Reacting with Anammox bacteria attached to the filler to generate nitrogen, and slowly stirring by a stirrer to fully react; nitrogen generated in the anaerobic ammonia oxidation reaction tank is discharged through an exhaust pipe, and a small amount of sludge generated is discharged through a sludge discharge pipe.
By adopting the sewage treatment method based on anaerobic ammonia oxidation denitrification under pulse aeration, NH in the nitrosation reaction tank is treated by the pulse aeration control system4 +、DO、NO2-N/NO3The concentration of-N is monitored and is dependent on NH4 +、DO、NO2-N/NO3The concentration of N is used for controlling the aeration quantity of the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc, and NH of sewage in the nitrosation reaction tank is treated by the alternate operation of aerobic/anoxic pulses4 +And NO2The molar concentration ratio of-N is controlled to quickly start the Anammox reaction, effectively shorten the reaction time, increase the impact load resistance of the anaerobic ammoxidation reactor, realize the short-cut nitrification denitrification without adding a carbon source, and ensure the stable water yield and quality of the sewageQualitative determination; namely, NH in the anaerobic ammonia oxidation process in the prior art is avoided4 +-N : NO2 -The proportional relation of-N is difficult to maintain, and various disadvantages are caused.
In some possible embodiments, the NH of the wastewater in the nitrosation reaction tank4 +、DO、NO2-N、NO3The concentration of-N is detected separately and is dependent on the detected NH4 +、DO、NO2-N、NO3-N concentration, adjusting the aeration rate of the aeration disc, and controlling NH in the sewage of the nitrosation reaction tank4 +And NO2-N in a molar concentration ratio of 0.65:1 to 1:1.35, comprising: by NH4 +Monitor, DO monitor, NO2-N、NO3NH of-N integrated monitor to sewage in nitrosation reaction tank4 +、DO、NO2-N、NO3The concentration of-N is detected separately, and the automatic control system is based on the detected NH4 +、DO、NO2-N、NO3The concentration of N, the aeration quantity of the aeration disc is adjusted by controlling a gas quantity adjusting valve and/or a fan, and NH in the sewage of the nitrosation reaction tank is controlled4 +And NO2The molar concentration ratio of-N is 0.65:1 to 1: 1.35.
In some possible embodiments, the autonomous system is based on detected NH4 +、DO、NO2-N、NO3The concentration of N, the aeration quantity of the aeration disc is adjusted by controlling a gas quantity adjusting valve and/or a fan, and NH in the sewage of the nitrosation reaction tank is controlled4 +And NO2-N in a molar concentration ratio of 0.65:1 to 1:1.35, comprising:
at NH4 +With NO2When the molar concentration ratio of N is more than 1:1.35, the automatic control system controls the air quantity regulating valve and/or the fan to increase the aeration quantity of the aeration disc; at NH4 +With NO2At a molar concentration of-N of less than 0.65:1, or, NO3Molar concentration of-N over NO2At a molarity of N or at a rate of increase of DO concentration exceeding DAnd when the O preset value is set, the automatic control system controls the air quantity regulating valve and/or the fan to reduce the aeration quantity of the aeration disc.
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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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 diagram of an anaerobic ammonia oxidation denitrification device based on pulse aeration according to an embodiment of the application;
fig. 2 is a flow chart of a sewage treatment method based on anaerobic ammonia oxidation and desorption under pulse aeration according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar terms in the embodiments of the invention do not denote any order, quantity, or importance, but rather the embodiments are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "upper," "lower," "left," "right," "horizontal," and "vertical" are used merely for relative terms as to the orientation of the elements in the drawings, and these directional terms are relative terms, which are used for descriptive and clarity relative to the elements and which can vary accordingly depending on the orientation in which the elements in the drawings are placed.
The embodiment of the application provides an anaerobic ammonia oxidation sewage autotrophic nitrogen removal device based on pulse aeration, as shown in figure 1, the anaerobic ammonia oxidation nitrogen removal device comprises: a pulse aeration control system 1, a nitrosation reaction system 2 and an anaerobic ammoxidation reaction system 3.
The pulse aeration control system 1 includes: autonomous system 10 (also referred to as a controller) and NH connected to autonomous system 104 +Monitor 11, DO monitor 12, NO2-N/NO3-N integrated monitor 13. It is understood that NH4 +Monitor 11 for detecting NH in liquid4 +The DO monitor 12 is used to detect the concentration of dissolved oxygen, NO, in the liquid2-N/NO3-N integrated monitor 13 for detecting NO in liquid2-N、NO3-the concentration of N.
Nitrosation reaction system 2 includes: a nitrosation reaction tank 20, an aeration disc 21, an air quantity regulating valve 22, a fan 23 and an air pipe H; wherein, the aeration disc 21 is arranged in the nitrosation reaction tank 20, the aeration disc 21 is connected with a fan 23 through an air pipe H, and an air quantity regulating valve 22 is arranged on the air pipe H.
Wherein, the nitrosation reaction tank 20 includes a water inlet and a water outlet, in some embodiments, as shown in fig. 1, a water inlet flow meter 26 may be disposed on a water inlet pipe T1 of the water inlet of the nitrosation reaction tank 20 to monitor the water inlet flow rate, so as to control the whole sewage treatment process.
It can be understood that the wastewater is nitrosated in the nitrosation reaction tank 20 to remove ammonia Nitrogen (NH) from the wastewater4 +-N) to nitrate Nitrogen (NO)2-N、NO3-N）。
The anammox reaction system 3 includes: anaerobic ammonia oxidation reaction tank 30, heating device 31 (such as heating rod), stirrer 32, exhaust pipe 33, water outlet pipe 34 and sludge discharge pipe 35.
It is understood that the wastewater is subjected to the Anammox reaction in the Anammox reaction tank 30, and NO generated in the nitrosation reaction stage is treated by Anammox bacteria2 --N and remaining NH4 +Reduction of-N metabolism to nitrogen (N)2）。
The anaerobic ammonia oxidation reaction tank 20 is communicated with a nitrosation reaction tank 30. Illustratively, the water outlet of the anammox reaction tank 20 may be connected to the water inlet of the nitrosation reaction tank 30 via a pipe, but is not limited thereto.
In addition, NH in the pulse aeration control System 14 + Monitor 11, DO monitor 12, NO2-N/NO3an-N integrated monitor 13 is arranged in the nitrosation reaction tank 2, NH4 +Monitor 11, DO monitor 12, NO2-N/NO3the-N integrated monitor 13 is respectively used for NH of the sewage in the nitrosation reaction tank 204 +、DO、NO2-N/NO3The concentration of-N is measured.
As shown in fig. 1, the autonomous system 10 is further connected to an air quantity adjusting valve 22 and a blower 23. The autonomous system 10 is adapted to operate in accordance with NH4 +Monitor 11, DO monitor 12, NO2-N/NO3NH detected by-N integrated monitor 134 +、DO、NO2-N/NO3The concentration of N, and the aeration quantity of the aeration disc 21 is adjusted by controlling the air quantity adjusting valve 22 and/or the fan 23 so as to control NH in the sewage of the nitrosation reaction tank 204 +And NO2-molar ratio of N.
The related art shows that NH in the sewage4 +And NO2The Anammox reaction can be rapidly started when the molar concentration ratio of-N is about 1:1. Based on this, in some possible implementations, nitrosation reactions may be controlledNH in sewage in reaction tank4 +And NO2The molar concentration ratio of N to NH is 1:1, and considering that the concentration of each ion in the wastewater is constantly in dynamic change, it is difficult to accurately control NH4 +And NO2The molar concentration ratio of-N is absolutely equal to 1:1, and NH in sewage in a nitrosation reaction tank can be controlled in practice4 +And NO2The molar concentration ratio of N to N is 0.65: 1-1: 1.35, so that the rapid start of the anaerobic ammonia oxidation reaction in the subsequent anaerobic ammonia oxidation reaction tank is ensured, and the reaction time is effectively shortened.
It should be noted that "and/or" in this application, which is used to describe the association relationship of the associated object, means that three relationships may exist, for example, "a and/or B" may mean: only A, only B and both A and B are present, wherein A and B may be singular or plural.
Illustratively, the above-mentioned adjusting the aeration amount of the aeration disc 21 by controlling the air amount adjusting valve 22 and/or the fan 23 may be adjusting the aeration amount of the aeration disc 21 by controlling the air amount adjusting valve 22, may also be adjusting the aeration amount of the aeration disc 21 by controlling the fan 23, and may also be adjusting the aeration amount of the aeration disc 21 by controlling the air amount adjusting valve 22 and the fan 23 together.
In conclusion, by adopting the anaerobic ammonia oxidation sewage autotrophic nitrogen removal device, NH in the nitrosation reaction tank is treated by the pulse aeration control system4 +、DO、NO2-N/NO3The concentration of-N is monitored and is dependent on NH4 +、DO、NO2-N/NO3The concentration of N is used for controlling the aeration quantity of the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc, and NH of sewage in the nitrosation reaction tank is treated by the alternate operation of aerobic/anoxic pulses4 +And NO2The molar concentration ratio of-N is controlled to quickly start the Anammox reaction, effectively shorten the reaction time, increase the impact load resistance of the anaerobic ammonia oxidation reactor, realize the short-cut nitrification denitrification without adding a carbon source, and ensure the effluent quantity and water quantity of the sewageThe quality is stable; namely, NH in the anaerobic ammonia oxidation process in the prior art is avoided4 +-N : NO2 --N : NO3 -The proportional relation of-N is difficult to maintain, and various disadvantages are caused.
In some embodiments, as shown in FIG. 1, the nitrosation reaction system 2 further includes an air flow meter 24 and a pressure transducer 25. Wherein, air flowmeter 24 and pressure sensor 25 set up on trachea H, and air flowmeter 24 and pressure sensor 25 all are connected with autonomous system 10. In this way, the autonomous system 10 can detect the air flow rate and the pressure in the air pipe H in real time, and can effectively control the aeration amount of the aeration disk 21 by controlling the air amount adjusting valve 22 and/or the blower 23.
Illustratively, in some possible embodiments, as shown in fig. 1, the nitrifying reaction system 2 may have a plurality of aeration disks 21, in which case, the air pipe H may include a main pipe and branch pipes, each aeration disk 21 is connected to the main pipe through a branch pipe, an air volume adjusting valve 22 is disposed on each branch pipe connected to each aeration disk 21, and an air flow meter 24 and a pressure sensor 25 are disposed on the main pipe.
The automatic control system 10 is used for controlling NH in the sewage in the nitrosation reaction tank 20 by controlling the air flow regulating valve 22 and/or the fan 23 to regulate the aeration rate of the aeration disc 214 +And NO2Specifically, the molar concentration ratio of-N is 0.65:1 to 1: 1.35.
Autonomous system 10 at NH4 +With NO2When the molar concentration ratio concentration of N is more than 1:1.35, controlling the air quantity regulating valve 22 and/or the fan 23 to increase the aeration quantity of the aeration disc 21.
It is understood here that NH is present in the effluent4 +With NO2When the molar concentration ratio concentration of N to NO is more than 1:1.35, the DO concentration in the sewage is increased by increasing the aeration quantity of the aeration disc 21, so that the oxidation of ammonia nitrogen into nitrite nitrogen (namely NO) can be accelerated2Oxidation of-N to NO3-N), thereby reducing NO in the wastewater2-the concentration of N.
Autonomous system 10 at NH4 +With NO2At a molar concentration of N less than 0.65:1, or, NO3Molar concentration of-N over NO2And when the molar concentration of N is lower than the preset value, or the rising speed of the DO concentration exceeds the preset value of DO, controlling the air quantity regulating valve 22 and/or the fan 23 to reduce the aeration quantity of the aeration disc 21.
It is understood here that NH is present in the effluent4 +With NO2At a molar concentration of N less than 0.65:1, or, NO3Molar concentration of-N over NO2When the molar concentration of N is below the threshold, or the DO concentration rises at a rate exceeding the predetermined DO value, the DO concentration in the wastewater is reduced by reducing the aeration rate of the aeration plate 21, and the oxidation of nitrite nitrogen to nitrate nitrogen (i.e., NO) can be prevented2Oxidation of-N to NO3-N) to inhibit the nitrosation reaction and thereby increase NH in the wastewater4 +The concentration of (c).
It should be noted that the above-mentioned DO preset value can be set according to actual requirements. For example, the DO preset value may be selected based on experience of one skilled in the art. Illustratively, the DO preset value may be 0.1 mg/L.
In combination with the apparatus for autotrophic denitrification of anammox sewage based on pulsed aeration provided in the foregoing embodiments (refer to fig. 1), the present application also provides a method for autotrophic denitrification of anammox sewage based on pulsed aeration, as shown in fig. 2, the method may include:
step 101, the sewage enters a nitrosation reaction tank 20 through a water inlet pipe, an aeration disc 21 in a pulse aeration mode is adopted to aerate the sewage, and the nitrosation reaction treatment is carried out on the sewage to oxidize ammonia nitrogen in the sewage into nitrite nitrogen.
Step 102, NH of sewage in the nitrosation reaction tank 204 +、DO、NO2-N、NO3The concentration of-N is detected separately and is dependent on the detected NH4 +、DO、NO2-N、NO3Concentration of-N, adjusting aeration amount of the aeration plate 21, and controlling NH in the sewage of the nitrosation reaction tank 204 +And NO2The concentration ratio of-N is 0.65:1 to 1: 1.35.
103, enabling the sewage treated by the nitrosation reaction to enter an anaerobic ammonia oxidation reaction tank 30 from a nitrosation reaction tank 20, heating the sewage to 25-35 ℃ at a water inlet through a heating device 31, controlling the dissolved oxygen to be below 0.1mg/L and NO in the sewage2-N and NH4 +Reacts with the Anammox bacteria attached to the packing C to generate nitrogen gas, and is slowly stirred by the stirrer 32 to sufficiently react.
Illustratively, in some possible implementations, the wastewater is heated to 30 ℃ at the point of influent by heating means 31 to ensure that the Anammox reaction is sufficiently carried out. In some possible implementations, the controlling dissolved oxygen below 0.1mg/L may be: the dissolved oxygen was controlled at 0.05mg/L to ensure that the Anammox reaction proceeded well.
In step 104, nitrogen generated in the anammox reaction tank 30 is discharged through the gas discharge pipe 33, and a small amount of sludge generated is discharged through the sludge discharge pipe 35.
In conclusion, by adopting the anaerobic ammonia oxidation sewage autotrophic nitrogen removal method based on pulse aeration, NH in the nitrosation reaction tank is treated by the pulse aeration control system4 +、DO、NO2-N/NO3The concentration of-N is monitored and is dependent on NH4 +、DO、NO2-N/NO3The concentration of N is used for controlling the aeration quantity of the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc, and NH of sewage in the nitrosation reaction tank is treated by the alternate operation of aerobic/anoxic pulses4 +And NO2The molar concentration ratio of N to N is controlled to quickly start the Anammox reaction, effectively shorten the reaction time, increase the impact load resistance of the anaerobic ammoxidation reactor, realize the short-cut nitrification denitrification without adding a carbon source and ensure the effluent quantity and the water quality stability of the sewage; namely, NH in the anaerobic ammonia oxidation process in the prior art is avoided4 +-N : NO2 --N : NO3 -The proportional relation of-N is difficult to maintain, and various disadvantages are caused.
The above-mentioned sewage treatment method (steps 101 to 104) based on anammox denitrification under pulse aeration includes, but is not limited to, the anammox denitrification apparatus provided in the above-mentioned embodiments, and any anaerobic ammoxidation denitrification apparatus based on pulse aeration using the above-mentioned sewage treatment method should be covered by the scope of protection of the present application.
Illustratively, in some possible implementation manners, referring to fig. 1, the step 102 may be: by NH4+Monitor 11, DO monitor 12, NO2-N/NO3NH of sewage in nitrosation reaction tank by-N integrated monitor 134 +、DO、NO2-N/NO3The respective N concentrations are detected, and the autonomous system 10 (or controller) is adapted to detect NH4 +、DO、NO2-N/NO3The concentration of N, and NH in the sewage of the nitrosation reaction tank 20 is controlled by controlling the aeration rate of the aeration disc 21 by controlling the air flow regulating valve 22 and/or the fan4 +And NO2The concentration ratio of-N is 0.65:1 to 1: 1.35.
Specifically, the autonomous system 10 is responsive to a detected NH4 +、DO、NO2-N/NO3The concentration of N, the aeration quantity of the aeration disc is adjusted, and NH in the sewage of the nitrosation reaction tank is controlled4 +And NO2The concentration ratio of N is 0.65: 1-1: 1.35, and the N can comprise:
at NH4 +With NO2When the molar concentration ratio concentration of N is more than 1:1.35, the automatic control system 10 controls the air quantity regulating valve 22 and/or the fan 23 to increase the aeration quantity of the aeration disc 21.
At NH4 +With NO2At a molar concentration of N less than 0.65:1, or, NO3Molar concentration of-N over NO2When the molarity of N is negative, or the rising speed of the DO concentration exceeds the DO preset value, the automatic control system 10 controls the air quantity adjusting valve 22 and/or the fan 23 to reduce the aeration quantity of the aeration disc 21.
For the related contents (for example, the DO preset value) of the above-mentioned method for treating sewage by anammox denitrification under pulse aeration, reference may be made to the above-mentioned apparatus for anammox denitrification under pulse aeration, and details thereof are not repeated herein.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (4)

1. An anaerobic ammonia oxidation sewage autotrophic denitrification device based on pulse aeration is characterized by comprising: a pulse aeration control system, a nitrosation reaction system and an anaerobic ammonia oxidation reaction system;
the pulse aeration control system comprises: autonomous system and NH connected to the autonomous system4 +Monitor, DO monitor, NO2-N/NO3-N integrated monitors;
the nitrosation reaction system includes: a nitrosation reaction tank, an aeration disc, a gas flow regulating valve, a fan and a gas pipe; the aeration disc is positioned in the nitrosation reaction tank and is connected with the fan through the air pipe, and the air quantity regulating valve is arranged on the air pipe;
the anaerobic ammonia oxidation reaction system comprises: the anaerobic ammonia oxidation reaction tank, the stirrer, the sludge discharge pipe, the water outlet pipe, the exhaust pipe and the heating device; the anaerobic ammonia oxidation reaction tank is communicated with the nitrosation reaction tank;
the NH4 +Monitor, DO monitor, NO2-N/NO3-N integrated monitors are positioned in the nitrosation reaction tank and are respectively used for monitoring NH in the sewage of the nitrosation reaction tank4 +、DO、NO2-N/NO3-detecting the concentration of N;
the automatic control system is also connected with the air quantity regulating valve and the fan;
the automatic control system is used for controlling the NH according to the NH4 +Monitor, NO2-N/NO3-N integral monitor, saidNH detected by DO monitor4 +、NO2-N/NO3N, DO, and controlling NH in the sewage in the nitrosation reaction tank by controlling the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc4 +And NO2-concentration ratio of N.
2. The anaerobic ammonia oxidation sewage autotrophic nitrogen removal device based on pulse aeration according to claim 1, wherein the nitrosation reaction system further comprises an air flow meter and a pressure sensor; the air flow meter and the pressure sensor are arranged on the air pipe, and the air flow meter and the pressure sensor are connected with the automatic control system.
3. The device for autotrophic nitrogen removal of anaerobic ammonia oxidation sewage based on pulse aeration according to claim 1, wherein said control of NH in sewage in said nitrosation reaction tank4 +And NO2-a concentration ratio of N comprising:
controlling NH in the sewage in the nitrosation reaction tank4 +And NO2The molar concentration ratio of-N is 0.65:1 to 1: 1.35.
4. The device for autotrophic nitrogen removal of anaerobic ammonia oxidation sewage based on pulse aeration according to claim 3, wherein,
the automatic control system is used for controlling the NH according to the NH4 +Monitor, NO2-N/NO3-N integrated monitor, NH detected by said DO monitor4 +、NO2-N/NO3N, DO, and controlling the air quantity regulating valve and/or the fan to regulate the aeration quantity of the aeration disc, comprising:
the automatic control system is in NH4 +With NO2When the molar concentration ratio concentration of N is more than 1:1.35, controlling the air quantity regulating valve and/or the fan to increase the aeration quantity of the aeration disc;
the automatic control systemIs integrated in NH4 +With NO2At a molar concentration of N less than 0.65:1, or, NO3Molar concentration of-N over NO2And N, or controlling the air quantity regulating valve and/or the fan to reduce the aeration quantity of the aeration disc when the DO concentration rising speed exceeds a DO preset value.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111732195A (en) * 2020-07-23 2020-10-02 昆明滇池水务股份有限公司 Anaerobic ammonia oxidation sewage autotrophic denitrification device and method based on pulse aeration

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111732195A (en) * 2020-07-23 2020-10-02 昆明滇池水务股份有限公司 Anaerobic ammonia oxidation sewage autotrophic denitrification device and method based on pulse aeration

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