CN217351115U - Device for treating aged landfill leachate by continuous flow fixed bed autotrophic denitrification - Google Patents

Device for treating aged landfill leachate by continuous flow fixed bed autotrophic denitrification Download PDF

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CN217351115U
CN217351115U CN202221381013.4U CN202221381013U CN217351115U CN 217351115 U CN217351115 U CN 217351115U CN 202221381013 U CN202221381013 U CN 202221381013U CN 217351115 U CN217351115 U CN 217351115U
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pipe
water
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reaction chamber
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高大文
杨文博
程朗
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Beijing University of Civil Engineering and Architecture
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Beijing University of Civil Engineering and Architecture
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

A device for treating aged landfill leachate by continuous flow fixed bed autotrophic denitrification relates to a device for treating aged landfill leachate. The device comprises a water inlet tank, a peristaltic pump, a reaction chamber, a secondary sedimentation tank, a return pipe, a connecting pipe, an air pump, an aeration pipe, a water outlet pipe and a water inlet pipe; the water inlet tank is communicated with the peristaltic pump and the peristaltic pump is communicated with the reaction chamber through a water inlet pipe; the reaction chamber is communicated with the secondary sedimentation tank through a connecting pipe; the water outlet pipe is connected with the secondary sedimentation tank; a reflux pump is arranged between the secondary sedimentation tank and the water inlet pipe, and the secondary sedimentation tank is communicated with the reflux pump and the reflux pump is communicated with the water inlet pipe through a reflux pipe; the reaction chamber is divided into four chambers, namely a chamber A, a chamber B, a chamber C and a chamber D in sequence along the water flow direction; a construction clapboard is arranged between the chambers, and the construction clapboard is provided with holes; fixed packing module assemblies are arranged in the chamber A, the chamber B, the chamber C and the chamber D; microporous aeration heads are arranged in the chamber B, the chamber C and the chamber D; the air pump is connected with the microporous aeration head through an aeration pipe.

Description

Device for treating aged landfill leachate by continuous flow fixed bed autotrophic denitrification
Technical Field
The utility model relates to a handle old landfill leachate's device.
Background
ANAMMOX (ANAMMOX) is a novel biological denitrification process discovered in the last 90 th century. The method is a denitrification process in which Anaerobic ammonia oxidizing Bacteria (AnAOB) take nitrite nitrogen as an electron acceptor for reaction and ammonia nitrogen as an electron donor to perform an Oxidation-reduction reaction to directly oxidize the ammonia nitrogen into nitrogen and a small amount of nitrate under an Anaerobic condition. As the substrates required by the AnAOB in the anaerobic ammonia oxidation process are mainly ammonia nitrogen and nitrite nitrogen, and meanwhile, the nitrite nitrogen concentration in the landfill leachate is very low. Therefore, in practical applications, amammox is usually coupled with a short-cut nitrification process, and such a process system is called an autotrophic nitrogen removal process. Short-cut nitration provides the necessary substrate NO for the anammox process 2 - N, allowing the anammox process to directly convert NH 4 + Conversion of-N to N 2 Thereby realizing the purpose of sewage denitrification. Compared with the traditional biological denitrification process, the autotrophic denitrification process has obvious advantages, such as: no need of additional carbon source, low residual sludge yield, saving aeration energy consumption by over 60 percent, and saving greenhouse gas (CO) 2 And N 2 O) low yield, etc. The process is divided according to the number of reactors, and the implementation form of the process is mainly divided into two stages and a single stage, wherein the two stages are used for respectively realizing short-cut nitrification and anaerobic Ammonia oxidation reactions in two serially connected reactors, and the single stage is used for realizing the synergistic effect of Ammonia Oxidizing Bacteria (AOB) and ANAOB in one reactor. The latter is gradually becoming the main operation mode of autotrophic nitrogen removal due to less occupied area and more convenient regulation.
The old landfill leachate has the water quality characteristics of complex composition components due to high ammonia nitrogen, low biodegradability and high ammonia nitrogen content of the composition components according to the landfill time and different substances, so that the biological denitrification treatment of the landfill leachate is very difficult.
SUMMERY OF THE UTILITY MODEL
The utility model aims to construct a device for treating aged landfill leachate by continuous flow fixed bed autotrophic nitrogen removal, which can realize single-stage autotrophic nitrogen removal.
A device for treating old landfill leachate by continuous flow fixed bed autotrophic nitrogen removal comprises a water inlet tank (1), a peristaltic pump (2), a reaction chamber (23), a secondary sedimentation tank (7), a return pipe (10), a connecting pipe (19), an air pump (12), an aeration pipe (13), a water outlet pipe (8) and a water inlet pipe (3);
the water inlet tank (1) is communicated with the peristaltic pump (2), and the peristaltic pump (2) is communicated with the reaction chamber (23) through a water inlet pipe (3);
the reaction chamber (23) is communicated with the secondary sedimentation tank (7) by a connecting pipe (19);
the water outlet pipe (8) is connected with the secondary sedimentation tank (7); a reflux pump (16) is arranged between the secondary sedimentation tank (7) and the water inlet pipe (3), and the secondary sedimentation tank (7) is communicated with the reflux pump (16) and the reflux pump (16) is communicated with the water inlet pipe (3) through a reflux pipe (10);
the reaction chamber (23) is divided into four chambers, namely a chamber A, a chamber B, a chamber C and a chamber D in sequence along the water flow direction; a construction clapboard (26) is arranged between the chambers, and the construction clapboard (26) is provided with holes;
fixed packing module assemblies (25) are arranged in the chamber A, the chamber B, the chamber C and the chamber D;
microporous aeration heads (15) are arranged in the chamber B, the chamber C and the chamber D; the air pump (12) is connected with the microporous aeration head (15) through an aeration pipe (13).
The utility model discloses the device is at fixed filler module subassembly (25) formation biomembrane, and the biomass that keeps somewhere that can be better makes the reaction effect more stable, has the research to show that AnAOB abundance and population diversity in the biomembrane often obviously are higher than floc mud.
The utility model discloses beneficial effect: the utility model discloses old landfill leachate's device is handled in autotrophic denitrogenation of continuous flow fixed bed adopts the plug flow mode, and ammonia nitrogen concentration reduces gradually along the journey in old landfill leachate, all keeps very high surplus ammonia nitrogen concentration in every region of device inside, is favorable to the suppression to nitrite oxidizing bacteria to provide sufficient reaction substrate for anaerobic ammonium oxidation bacteria. The regional zone control method of the fixed filler module assembly in four chambers combined with a reaction chamber (23) (A, B, C, D) controls the water inlet load by adjusting a water inlet pump and controls the dissolved oxygen concentration by the aeration amount in each region, and then monitors the pH and the dissolved oxygen concentration along the water flow of the reaction device by inserting a pH and dissolved oxygen monitoring probe in each region, thereby avoiding the higher dissolved oxygen concentration from promoting the activity of nitrite oxidizing bacteria, avoiding the excessive aeration from promoting the growth and proliferation of the nitrite oxidizing bacteria and strengthening the stable operation of the single-stage autotrophic nitrogen removal system.
The utility model discloses can promote the transformation of following novel high-efficient low energy consumption sewage factory of traditional biological denitrogenation sewage factory to the current reaction facility of refuse landfill sewage treatment through reforming transform, practice thrift a large amount of capital construction costs simultaneously.
Drawings
FIG. 1 is a schematic diagram of an apparatus used in one embodiment of a method;
FIG. 2 is a schematic top view of the water bath incubator (22) of the apparatus used in one embodiment of the method.
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 invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The first embodiment is as follows: the continuous flow fixed bed autotrophic nitrogen removal device for treating aged landfill leachate according to the present embodiment is described with reference to fig. 1 and 2, and comprises a water inlet tank 1, a peristaltic pump 2, a reaction chamber 23, a secondary sedimentation tank 7, a return pipe 10, a connecting pipe 19, an air pump 12, an aeration pipe 13, a water outlet pipe 8 and a water inlet pipe 3;
the water inlet tank 1 is communicated with the peristaltic pump 2, and the peristaltic pump 2 is communicated with the reaction chamber 23 through a water inlet pipe 3;
the reaction chamber 23 is communicated with the secondary sedimentation tank 7 through a connecting pipe 19;
the water outlet pipe 8 is connected with the secondary sedimentation tank 7; a reflux pump 16 is arranged between the secondary sedimentation tank 7 and the water inlet pipe 3, and the secondary sedimentation tank 7 is communicated with the reflux pump 16 and the reflux pump 16 is communicated with the water inlet pipe 3 through a reflux pipe 10;
the method is characterized in that: the reaction chamber 23 is divided into four chambers, namely a chamber A, a chamber B, a chamber C and a chamber D in sequence along the water flow direction; a construction clapboard 26 is arranged between the chambers, and the construction clapboard 26 is provided with holes;
fixed packing module assemblies 25 are arranged in the chamber A, the chamber B, the chamber C and the chamber D;
microporous aeration heads 15 are arranged in the chamber B, the chamber C and the chamber D; the air pump 12 is connected with the microporous aeration head 15 through an aeration pipe 13.
The second embodiment is as follows: the present embodiment is different from the first embodiment in that: a water collecting tank 5 and a water outlet tank 6 are sequentially arranged between the reaction chamber 23 and the secondary sedimentation tank 7 along the water flow direction. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment is different from the first or second embodiment in that: the number of holes on each building baffle 26 is 2, and the diameter of the holes is 1 cm. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: this embodiment is different from the first, second, or third embodiment in that: the device also comprises a time relay 11, an air pump 12 is controlled by the time relay 11, and an aeration pipe 13 is provided with a gas flowmeter 14. The others are the same as in the first or second or third embodiment.
The fifth concrete implementation mode is as follows: the present embodiment is different from one of the first to fourth embodiments in that: the device also comprises a dissolved oxygen monitoring probe 17, a pH monitoring probe 18, a filler fixing screen plate 20 and a dissolved oxygen and pH monitor 24; the dissolved oxygen monitoring probe 17 is arranged in the cavity of the reaction chamber 23A; the pH monitoring probe 18 is arranged in the reaction chamber 23B; the dissolved oxygen monitoring probe 17 and the pH monitoring probe 18 are connected with a dissolved oxygen and pH monitor 24; the fixed packing module assemblies 25 are fixed below the packing retention screen 20. The rest is the same as one of the first to fourth embodiments.
The sixth specific implementation mode is as follows: the present embodiment is different from one of the first to fifth embodiments in that: the device also comprises a water bath heat preservation box 22, and the reaction chamber 23, the water collecting tank 5 and the water outlet tank 6 are all arranged in the water bath heat preservation box 22. The rest is the same as one of the first to fifth embodiments.
The seventh embodiment: the present embodiment is different from one of the first to sixth embodiments in that: the filler module component comprises nylon wires, K3 filler and activated carbon powder; the K3 filler is divided into two types, one type is a common K3 filler, and the other type is that the activated carbon powder is adhered to the surface of the K3 filler by using the water-based polyurethane. The fillers of the same type are respectively vertically connected in series into a string by using nylon wires, and the number of each string of the fillers is 20. The rest is the same as one of the first to sixth embodiments.
The specific implementation mode is eight: the present embodiment is different from the first to seventh embodiments in that: two strings of K3 packing and two strings of activated carbon modified K3 packing are arranged in each of the reaction chamber 23A chamber, the reaction chamber B chamber, the reaction chamber C chamber and the reaction chamber D chamber in a crossed manner, and the pH and dissolved oxygen monitoring probes inserted into the packing module assemblies are used for monitoring the dissolved oxygen and the pH in each region respectively. The rest is the same as one of the first to seventh embodiments.
The specific implementation method nine: the present embodiment is different from the first to eighth embodiments in that: the microporous aeration head is connected with an aeration pipe, inserted at the lowest end of the fixed filler module assembly, placed in the middle area of four strings of fillers in each chamber, connected with a gas flow meter, and connected with an air pump and a time relay to control the concentration of dissolved oxygen in B, C, D chambers. The rest is the same as the first to eighth embodiments.
The specific implementation mode is ten: the present embodiment is different from one of the first to ninth embodiments in that: the pH monitoring probe and the dissolved oxygen monitoring probe are inserted into the cavity of the reaction cavity 23A, the cavity of the reaction cavity B, the cavity of the reaction cavity C and the cavity of the reaction cavity D, and are used for measuring the pH and the dissolved oxygen concentration in different cavities. The rest is the same as one of the first to ninth embodiments.
Example 1
The device for treating the aged landfill leachate by continuous flow fixed bed autotrophic denitrification comprises a water inlet tank 1, a peristaltic pump 2, a reaction chamber 23, a secondary sedimentation tank 7, a return pipe 10, a connecting pipe 19, an air pump 12, an aeration pipe 13, a water outlet pipe 8 and a water inlet pipe 3;
the water inlet tank 1 is communicated with the peristaltic pump 2, and the peristaltic pump 2 is communicated with the reaction chamber 23 through a water inlet pipe 3;
the reaction chamber 23 is communicated with the secondary sedimentation tank 7 through a connecting pipe 19;
the water outlet pipe 8 is connected with the secondary sedimentation tank 7; a reflux pump 16 is arranged between the secondary sedimentation tank 7 and the water inlet pipe 3, and the secondary sedimentation tank 7 is communicated with the reflux pump 16 and the reflux pump 16 is communicated with the water inlet pipe 3 through a reflux pipe 10;
the reaction chamber 23 is divided into four chambers, namely a chamber A, a chamber B, a chamber C and a chamber D in sequence along the water flow direction; a construction clapboard 26 is arranged between the chambers, and the construction clapboard 26 is provided with holes;
fixed packing module assemblies 25 are arranged in the chamber A, the chamber B, the chamber C and the chamber D;
microporous aeration heads 15 are arranged in the chamber B, the chamber C and the chamber D; the air pump 12 is connected with the microporous aeration head 15 through an aeration pipe 13; the device also comprises a water bath insulation can 22, and the reaction chamber 23, the water collecting tank 5 and the water outlet tank 6 are all arranged in the water bath insulation can 22; the number of holes on each building baffle 26 is 2, and the diameter of the holes is 1 cm.
The method for treating the aged landfill leachate by using the device of the embodiment comprises the following steps:
establishing stage of continuous flow fixed bed autotrophic nitrogen removal system
The fixed filler module component 25 is inoculated with autotrophic denitrification sludge, and then manual water distribution is used as inlet water, and the hydraulic retention time in the reaction chamber 23 is controlled to be 48 hours;
firstly, the chamber of the reaction chamber 23A is not aerated, the chamber of the reaction chamber 23B, the chamber C and the chamber D are aerated, the aeration flow rates are respectively 30mL/min, 30mL/min and 30mL/min, the aeration time and the aeration stop time are respectively 120min and 240min, and the initial reflux ratio is 1000%; after the ammonia nitrogen removal rate in the effluent is stably increased and maintained, the aeration flow rates of the chamber 23B, the chamber C and the chamber D are respectively kept at 30mL/min, 30mL/min and 30mL/min, and the aeration time and the aeration stop time are gradually adjusted to 60min and 60 min; after the removal rate of ammonia nitrogen in the effluent is stably increased and is maintained to be stable again, the aeration flow rates of the chamber 23B, the chamber C and the chamber D are gradually adjusted to 60mL/min, 60mL/min and 60mL/min, the aeration time and the aeration stop time are kept to 60min and 60min, the reflux flow rate is reduced to be equal to the inflow rate, and the recovery of the continuous flow fixed bed autotrophic nitrogen removal system is completed until the ammonia nitrogen in the effluent is lower than 10mg/L, the total nitrogen in the effluent is lower than 35mg/L and the removal rate of the total nitrogen reaches more than 80%;
second, adaptation stage of continuous flow fixed bed autotrophic nitrogen removal system
Changing the water inlet into 10-time diluted landfill leachate ammonia nitrogen concentration to 400mg N/L, and gradually increasing the aeration quantity of a reaction chamber 23B chamber, a reaction chamber C chamber and a reaction chamber D chamber to 120mL/min, 120mL/min and 120 mL/min; until the water quality in the reaction chamber 23 is clear and no obvious suspended sludge exists, the aeration flow rates of the chamber B, the chamber C and the chamber D of the reaction chamber 23 are increased to 150mL/min, 150mL/min and 150 mL/min; when the ammonia nitrogen of the effluent is lower than 50mg/L, the total nitrogen of the effluent is lower than 70mg/L, and the total nitrogen removal rate reaches more than 80 percent, the adaptation of the continuous flow fixed bed autotrophic nitrogen removal system is realized;
thirdly, treating the aged landfill leachate
Taking old landfill leachate as inlet water, controlling the hydraulic retention time in the reaction chamber 23 to be 48h, not aerating the chamber of the reaction chamber 23A, aerating the chamber of the reaction chamber 23B, the chamber C and the chamber D, wherein the aeration flow rates are 150mL/min, 150mL/min and 150mL/min respectively; the reflux flow rate is equal to the feed water flow rate; namely, the treatment of the aged landfill leachate is realized;
wherein, ammonia nitrogen is 200mg N/L, sodium bicarbonate is 1700mg/L, magnesium sulfate is 200mg/L, calcium chloride is 150mg/L, and monopotassium phosphate is 27mg/L in the artificial water preparation in the step one.
The autotrophic nitrogen removal sludge in the embodiment is the autotrophic nitrogen removal sludge used for treating sludge digestive juice in the original municipal sewage treatment plant. The amount of autotrophic denitrification sludge inoculated sludge was 6.8L (MLSS 22.05g/L, MLVSS 9.12g/L), and the reaction chamber 23 had a volume of 6.6L for each of the four chambers.
In the embodiment, raw water in the water inlet tank 1 is input into a reaction chamber 23 of the plug-flow type fixed bed reaction device through the water inlet pipe 3 by the peristaltic pump 2, the inlet water flows among the reaction chambers through holes on the constructed partition plates, the outlet water overflows to a secondary sedimentation tank through an outlet weir on the outlet trough, and the constructed partition plates divide the reaction chamber 23 into four reaction chambers with equal size. The time relay controls the aeration and the aeration stop of the air pump, the gas flowmeter controls the aeration flow of the microporous aeration head, the dissolved oxygen monitoring probe and the pH monitoring probe which are connected with the dissolved oxygen and pH monitor are used for measuring DO and pH in the reaction chamber 23, and the water bath incubator is used for maintaining the operation temperature of the reaction chamber 23.
The operation principle of the device of the embodiment is as follows:
inoculating autotrophic denitrification sludge on the filler module assembly, and utilizing the water bath incubator 22 to ensure that the running temperature of the device for treating the aged landfill leachate by continuous flow fixed bed autotrophic denitrification reaches 28 +/-2 ℃. The three chambers of the reaction chamber 23B chamber, the C chamber and the D chamber are aerated through the microporous aeration head, the operation and the stop of the aeration pump are controlled by a time relay to adjust the aeration time, and the aeration flow in the three areas is adjusted by a gas flow meter. The water inlet load of the plug flow reaction device is adjusted by utilizing the flow rate of the water inlet pump. The single-stage autotrophic nitrogen removal system is started in the device by limiting the dissolved oxygen concentration of four chambers of the reaction chamber 23A, the B, the C and the D chambers and gradually increasing the water inlet load. The inlet water loops through four cavities of the reaction cavity 23A, the cavity B, the cavity C and the cavity D, and fully contacts with the biomembrane on the fixed filler module component 25 to convert nitrogen into nitrogen to escape from the upper part of the reaction device, the treated water enters the water outlet tank after passing through the overflow weir, the water in the water outlet tank enters the secondary sedimentation tank from the bottom of the secondary sedimentation tank, the backflow pipe is connected to the bottom of the secondary sedimentation tank and enters the reaction device again through the backflow pump, and the outlet water is discharged through the water outlet pipe at the top of the secondary sedimentation tank. In the process, the AOB and the anammox bacteria activity are synchronously recovered by low aeration (30mL/min) and intermittent aeration in the step one; after the ammonia nitrogen removal rate in the effluent water is stabilized for the first time, gradually reducing the aeration stopping time, gradually increasing the total aeration amount (the aeration flow is kept at 30mL/min, and the aeration time and the aeration stopping time are gradually adjusted to 60min and 60min), and converting half of ammonia nitrogen into nitrite in the process; and (3) after the ammonia nitrogen removal rate in the effluent obtained in the first step is stabilized for the second time, ensuring that the aeration time and the aeration stop time are unchanged, and improving the aeration flow (60mL/min) of the chambers of the reaction chamber 23B, the chamber C and the chamber D so as to balance the activities of anaerobic ammonium oxidation bacteria and reduce the accumulation condition of nitrite.
In this embodiment, the number of holes in each of the partition plates 26 is 2, and the diameter of each hole is 1 cm.
The device used in the embodiment also comprises a time relay 11, the air pump 12 is controlled by the time relay 11, and an air flow meter 14 is arranged on an aeration pipe 13. The device also comprises a dissolved oxygen monitoring probe 17, a pH monitoring probe 18, a filler fixing screen plate 20 and a dissolved oxygen and pH monitor 24; the dissolved oxygen monitoring probe 17 is arranged in the cavity of the reaction chamber 23A; the pH monitoring probe 18 is arranged in the reaction chamber 23B; the dissolved oxygen monitoring probe 17 and the pH monitoring probe 18 are connected with a dissolved oxygen and pH monitor 24; the fixed packing module assemblies 25 are fixed below the packing retention screen 20.
In the present embodiment, the reaction chamber 23A is set to pre-denitrification without aeration.
In the first step of the embodiment, the ammonia nitrogen removal rate in the effluent is maintained stable again, then the reflux flow is further reduced to be equal to the inflow flow, the running cost is reduced by controlling the rotating speed of the reflux pump, and the concentration of the effluent trinitrogen (ammonia Nitrogen (NH) 3 -N), nitrite Nitrogen (NO) 2 -N), nitrate Nitrogen (NO) 3 -N)) is not significantly changed and the nitrate nitrogen remains less than the theoretical stoichiometric ratio.
From the analysis of the conversion of the nitrogen along the reaction chamber 23, the total nitrogen removal capacities of the fixed packing module assemblies in different stages of the step I and the chambers A, B, C and D are not greatly different, the liquid mixing effect among different chambers is weakened due to the small hole area among the constructed partition plates in the step II, and the total nitrogen removal capacity difference is obvious (for example, the ammonia nitrogen, nitrite and nitrate nitrogen concentrations of the chamber A are 54.03mg N/L, 0.87mg N/L and 12.99mg N/L respectively, and the ammonia nitrogen, nitrite and nitrate nitrogen concentrations of the chamber B are 50.62mg N/L, 0.585mg N/L and 13.37mg N/L respectively when the step I is completed), so that the expected layering effect is achieved.

Claims (6)

1. A device for treating old landfill leachate by continuous flow fixed bed autotrophic nitrogen removal comprises a water inlet tank (1), a peristaltic pump (2), a reaction chamber (23), a secondary sedimentation tank (7), a return pipe (10), a connecting pipe (19), an air pump (12), an aeration pipe (13), a water outlet pipe (8) and a water inlet pipe (3);
the water inlet tank (1) is communicated with the peristaltic pump (2), and the peristaltic pump (2) is communicated with the reaction chamber (23) through a water inlet pipe (3);
the reaction chamber (23) is communicated with the secondary sedimentation tank (7) by a connecting pipe (19);
the water outlet pipe (8) is connected with the secondary sedimentation tank (7); a reflux pump (16) is arranged between the secondary sedimentation tank (7) and the water inlet pipe (3), and the secondary sedimentation tank (7) is communicated with the reflux pump (16) and the reflux pump (16) is communicated with the water inlet pipe (3) through a reflux pipe (10);
the method is characterized in that: the reaction chamber (23) is divided into four chambers, namely a chamber A, a chamber B, a chamber C and a chamber D in sequence along the water flow direction; a construction clapboard (26) is arranged between the chambers, and the construction clapboard (26) is provided with holes;
fixed packing module assemblies (25) are arranged in the chamber A, the chamber B, the chamber C and the chamber D;
microporous aeration heads (15) are arranged in the chamber B, the chamber C and the chamber D; the air pump (12) is connected with the microporous aeration head (15) through an aeration pipe (13).
2. The continuous flow fixed bed autotrophic nitrogen removal treatment plant for landfill leachate according to claim 1, characterized in that a water collection tank (5) and a water outlet tank (6) are sequentially arranged between the reaction chamber (23) and the secondary sedimentation tank (7) along the water flow direction.
3. The apparatus for continuous flow fixed bed autotrophic nitrogen removal treatment of landfill leachate according to claim 1, wherein the number of holes per construction partition (26) is 2, and the diameter of the holes is 1 cm.
4. The apparatus for continuous flow fixed bed autotrophic nitrogen removal treatment of landfill leachate according to claim 1, characterized in that the apparatus further comprises a time relay (11), the air pump (12) is controlled by the time relay (11), and the aeration pipe (13) is provided with a gas flow meter (14).
5. The apparatus for continuous flow fixed bed autotrophic nitrogen removal treatment of old landfill leachate according to claim 1, wherein the apparatus further comprises a dissolved oxygen monitoring probe (17), a pH monitoring probe (18), a packing fixing mesh plate (20), a dissolved oxygen, pH monitor (24); the dissolved oxygen monitoring probe (17) is arranged in a chamber A of the reaction chamber (23); the pH monitoring probe (18) is arranged in a cavity B of the reaction cavity (23); the dissolved oxygen monitoring probe (17) and the pH monitoring probe (18) are connected with a dissolved oxygen and pH monitor (24); the fixed packing module assembly (25) is fixed under the packing fixed screen (20).
6. The apparatus for continuous flow fixed bed autotrophic nitrogen removal treatment of old landfill leachate according to claim 2, characterized in that the apparatus further comprises a water bath incubator (22), wherein the reaction chamber (23), the water collection tank (5) and the water outlet tank (6) are all disposed in the water bath incubator (22).
CN202221381013.4U 2022-06-01 2022-06-01 Device for treating aged landfill leachate by continuous flow fixed bed autotrophic denitrification Active CN217351115U (en)

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