CN202492432U - Device for denitrification by SBR combined with anaerobic ammoxidation of landfill leachate - Google Patents

Abstract

The utility model relates to a combination denitrification device of landfill leachate SBR and anaerobic ammonium oxidation, which belongs to the technical field of biological denitrification of landfill leachate with low carbon-to-nitrogen (C/N) ratio and high concentration ammonia nitrogen. The device is equipped with an integrated water tank, SBR short-range nitrification reactor, and anaerobic ammonium oxidation reactor; The water tank is connected to the bottom of the anammox reactor through an outlet pipe and a peristaltic pump, and the anammox reactor is provided with a self-circulation pipeline, and is connected to the SBR front water tank through an outlet pipe and a peristaltic pump; the method includes The following steps: start the SBR short-cut nitrification reactor, start the anaerobic ammonium oxidation reactor, and run the SBR short-cut nitrification reactor and the anaerobic ammonium oxidation reactor in series. The device of the utility model is suitable for the removal of organic matter and short-range denitrification of late-stage landfill leachate, and has advanced technology and obvious advantages of energy saving and consumption reduction.

Description

Combination denitrification device of landfill leachate SBR and anaerobic ammonium oxidation

technical field

The utility model relates to a combined denitrification device for landfill leachate SBR and anaerobic ammonium oxidation, which belongs to the technical field of biological denitrification of waste water with low carbon nitrogen (C/N) ratio and high concentration ammonia nitrogen, and is suitable for low C/N of late stage landfill leachate and the like. Biological denitrification of high ammonia-nitrogen wastewater with N ratio. the

Background technique

In recent years, with the increasing output of municipal solid waste, landfilling has gradually become the most widely used treatment and disposal method in the world. The leachate produced by landfill has the characteristics of complex composition, large changes in water quality and quantity, high concentration of organic matter and ammonia nitrogen, and imbalance of microbial nutrient elements, making its treatment one of the unsolved problems in the international scope. It is often impossible to treat leachate economically and efficiently by using a single treatment technology, and a combination of processes with different characteristics is required. The serious lack of organic carbon source is the barrier that the denitrification efficiency of late leachate cannot be improved, and the addition of organic carbon source will greatly increase the cost of sewage denitrification. Therefore, more effective denitrification devices and methods need to be proposed. the

Sewage biological denitrification converts NH ₄ ⁺ -N into NO ₃ ^- -N through nitrification, and then converts NO ₃ ^- -N into nitrogen through denitrification and escapes from the water. In the denitrification stage, NO ₃ ^- -N is used as the electron acceptor, organic matter is used as the electron donor, and ammonia nitrogen is converted into nitrogen to complete biological denitrification. However, for high NH ₄ ⁺ -N late stage landfill leachate denitrification, the C/N ratio is only about 1. Due to the serious shortage of organic carbon sources, the efficiency of traditional biological denitrification can only reach about 10%.

And anammox has the following advantages: Since anammox bacteria are autotrophic bacteria, carbonate/carbon dioxide is the inorganic carbon source required for their growth, so the oxidation of ammonia nitrogen does not require the participation of molecular oxygen, while the oxidation of nitrite nitrogen The reduction also does not require organic carbon sources, which will greatly reduce the operating costs of aerobic biological denitrification of sewage; the growth rate (doubling time of 11d) and production rate (0.11g[VSS]/g[NH ₄ ⁺ ]) of Anammox microorganisms are It is very low, so the sludge output is low, but the conversion rate of nitrogen is 0.25mg[N]/(mg[SS]·d), which is comparable to the traditional aerobic nitrification; under the condition of not adding any chemicals , can not only reduce the operating cost of the sewage treatment plant, but also realize the efficient removal of nitrogen. For the leachate landfill leachate with low C/N ratio and high ammonia nitrogen, the realization of anammox reaction is the best way to denitrify it, and it is also the most suitable denitrification technology for its water quality characteristics.

Utility model content

The purpose of this utility model is to solve the above-mentioned technical problems, and propose a combination denitrification device of landfill leachate SBR and anaerobic ammonium oxidation, that is, to firstly realize the short-range nitrification reaction of high-concentration NH ₄ ⁺ -N in the leachate of urban landfill sites , and then realize the anaerobic ammonium oxidation reaction, and finally realize the device and method of cost-effective autotrophic denitrification of landfill leachate.

The purpose of this utility model is achieved by the following technical solutions:

A combined denitrification device for landfill leachate SBR and anaerobic ammonium oxidation, characterized in that:

The device includes an integrated water tank, SBR short-range nitrification reactor, and anaerobic ammonium oxidation reactor; the integrated water tank includes a raw water tank, a rear water tank, a front water tank, and a heating device placed between the raw water tank, the rear water tank, and the front water tank. Water tank, the heating water tank is equipped with a temperature-controlled heating device; the raw water tank is connected to the front water tank through the first water inlet pipe and the first peristaltic pump, and the raw water tank is connected to the anaerobic ammonia oxidation reactor through the fourth water inlet pipe and the seventh peristaltic pump The front water tank in the integrated water tank is connected with the fourth peristaltic pump and the SBR short-range nitrification reactor through the second water inlet pipe, and the SBR short-range nitrification reactor is connected with the rear water tank through the first water outlet pipe and the fifth peristaltic pump. connection, the rear water tank is connected to the bottom of the anammox reactor through the third water inlet pipe and the third peristaltic pump, and the anammox reactor is provided with a second return pipe and a sixth peristaltic pump for self-circulation, anaerobic The ammonia oxidation reactor is connected with the first return pipe and the front water tank through the second peristaltic pump;

The SBR short-range nitrification reactor is equipped with several first sampling valves from top to bottom, the second water inlet pipe is equipped with a water inlet control valve; the first water outlet pipe is equipped with a drain valve; the SBR short-range nitrification reactor is equipped with a mechanical stirring device; There is an aeration head at the bottom of the SBR short-range nitrification reactor, and the aeration head is connected with the aeration pump through an aeration pipe. meter and pH meter;

The anaerobic ammonium oxidation reactor is equipped with a temperature-controlled heating belt device and a cylindrical sludge bed. The upper part of the anaerobic ammonium oxidation reactor is provided with a three-phase separator and a top sealing plate. The upper part of the three-phase separator is connected with the lye bottle, The second gas flowmeter is connected; the upper supernatant of the cylindrical sludge bed enters the bottom of the cylindrical sludge bed through the sixth peristaltic pump for circulation; part of the overflow water at the top of the cylindrical sludge bed is discharged through the second outlet pipe , part of which is returned to the front water tank, and several second sampling valves connecting the upper and lower sides of the sludge bed are arranged outside the anaerobic ammonium oxidation reactor. the

Utilize above-mentioned device to realize the method for combined denitrification of landfill leachate short-range nitrification and anaerobic ammonium oxidation, it is characterized in that comprising the following steps:

Step 1: Start the SBR short-cut nitrification reactor: use the nitrification sludge of the actual urban sewage treatment plant as the seed sludge to inject into the SBR short-cut nitrification reactor, and the sludge concentration is 5000kg MLSS/m ³ , and at the same time, use the actual urban waste landfill The on-site leachate is the original liquid and diluted with tap water and injected into the front water tank. The front water tank pumps the diluted leachate into the SBR short-range nitrification reactor through the second water inlet pipe and the fourth peristaltic pump; The aeration system composed of pumps and aeration pipes nitrifies the landfill leachate flowing into the SBR short-path nitrification reactor. During the reaction process, the dissolved oxygen DO is maintained at about 2mg/L, and the pH value is maintained at about 7.8. If the pH is too high or too low , then add NaHCO ₃ to maintain the pH value in this range, and maintain the NH ₄ ⁺ -N load of the SBR short-path nitrification reactor by adjusting the fourth peristaltic pump to about ALR=0.4kgNH ₄ ⁺ -N/m ³ d, The average free ammonia FA concentration in the SBR short-path nitrification reactor is 18 mg/L by keeping the pH value and ALR at the above-mentioned values; when the SBR short-path nitrification reactor is operated under the above-mentioned conditions, when the effluent nitrite nitrogen NO ₂ ^- -N accumulates When the rate is greater than 95%, the SBR short-cut nitrification can be realized and maintained, and the influent water quality requirements of the anammox reactor are met;

Step 2: Start the anammox reactor: add the sludge with certain anammox activity in the pilot anammox reactor of a sewage treatment plant to the anammox reactor, and the sludge concentration 5kg MLSS/m ³ ; the temperature of the anaerobic ammonium oxidation reactor is controlled at 35°C through a temperature-controlled heating belt device, and the effluent and leachate stock solution of the SBR short-range nitrification reactor are diluted with tap water to make the nitrite nitrogen and ammonia nitrogen The concentration is maintained at 100mg/L, and at the same time, the diluted mixed water is pumped into the anammox reactor at a flow rate of 20L/d; when the anammox reactor effluent NH ₄ ⁺ -N and NO ₂ ^- - When the N concentration is less than 15mg/L, the anammox reaction can be realized and maintained;

Step 3: After the SBR short-range nitrification reactor and the anaerobic ammonium oxidation reactor are started respectively, the two are operated in series: the water filling ratio of the SBR short-range nitrification reactor is 1:1, and the landfill leachate in the raw water tank and the anaerobic ammonium oxidation reactor The mixture of effluent and reflux liquid from the oxygen ammonia oxidation reactor is pumped into the front water tank through the first peristaltic pump and the second peristaltic pump. In the reactor, the carbon source of the leachate is used as the carbon source for denitrification to denitrify. During the denitrification stage, the ORP gradually decreases until a plateau appears, and when the pH value rises to the highest point and does not change, the SBR is turned off at this time. The mechanical stirring device of the short-range nitrification reactor stops anoxic stirring, stops denitrification, and then turns on the aeration pump for aeration and nitrification. With the generation of acid in the nitrification process, the pH gradually decreases. When the ammonia nitrogen is consumed, the concentration of nitrite It reached the maximum value, and then the pH gradually increased due to stripping; at the same time, the DO concentration increased rapidly, and ammonia valleys and DO jump points appeared on the pH and DO curves respectively. In addition, the ORP value also increased with the progress of nitrification The ORP does not change with the continuation of aeration until the ammonia nitrogen is consumed and the nitrite concentration reaches the maximum value; the appearance of the ORP platform indicates that the nitrate and nitrite no longer increase, and the nitrification is over. At this time, the aeration is stopped. Turn off the aeration pump; after nitrification is completed, settle still for 30 to 60 minutes to separate the mud and water, and turn on the fifth peristaltic pump 32 to pump the supernatant into the rear water tank; The bottom of the oxidation reactor is pumped in. When NO ₂ ^- -N/NH ₄ ⁺ -N>1.32, the flow rate from the raw water tank into the anammox reactor should be appropriately increased. On the contrary, when NO ₂ ^- -N/NH ₄ ⁺ - When N<1.32, appropriately reduce the flow rate from the raw water tank into the anammox reactor; the nitrification mixture flowing in from the SBR short-path nitrification reactor and the raw water tank enters the anammox reaction through the third and seventh peristaltic pumps The anammox reactor completes the anaerobic ammonium oxidation reaction; when the total nitrogen load of the anaerobic ammonium oxidation reactor reaches 0.8kg TN/m ³ d or more, and the removal rate of NH ₄ ⁺ -N and NO ₂ ^- -N in the system effluent is greater than 90%, the system The whole process of autotrophic denitrification of landfill leachate is realized.

Beneficial effect

Compared with the prior art, the landfill leachate SBR and anaerobic ammonium oxidation combined denitrification device of the present utility model has the following advantages:

The whole autotrophic denitrification process of leachate:

1) Under the condition of not adding any additional carbon source, the high-efficiency biological denitrification of landfill leachate is realized, which solves the problem of late leachate treatment with high concentration of ammonia nitrogen and low carbon-to-nitrogen ratio, and greatly reduces the operation and construction costs. the

2) The realization of short-range nitrification makes the conversion method of ammonia nitrogen different from the traditional nitrification method, reduces energy consumption, improves efficiency, and reduces sludge production. the

3) Grasp the process of short-range denitrification by online detection of ORP and pH value, and use the process control method to control the stirring time in real time, so as to achieve the purpose of energy saving. In the nitrification process, the ammonia valley, DO breakthrough point and ORP platform not only accurately indicate the end point of nitrification and save energy, but also avoid excessive aeration and maintain a high nitrous acid accumulation rate. the

4) After the technology is mature and running, it does not need to add additional chemicals, and does not need to add water to dilute the original solution, which simplifies the management process and can directly treat late-stage leachate with high ammonia nitrogen concentration. the

Description of drawings

Fig. 1 is a structural schematic diagram of a combination denitrification device for landfill leachate SBR and anaerobic ammonium oxidation of the present invention. the

In the figure: 1-integrated water tank; 2-raw water tank; 3-rear water tank; 4-front water tank; 5-water inlet control valve; 6-drain valve; 7-temperature control heating device; 8-second inlet Water pipe; 9-DO instrument; 10-first gas flow meter; 11-mechanical stirring device; 12-first sampling valve; 13-ORP instrument; 14-pH instrument; 15-anammox reactor; 16-the first Two sampling valves; 17-three-phase separator; 18-lye bottle; 19-second gas flow meter; 20-second outlet pipe; 21-first peristaltic pump; 22-first water inlet pipe; 23-second Peristaltic pump; 24-third peristaltic pump; 25-seventh peristaltic pump; 26-first outlet pipe; 27-first return pipe; 28-aeration pump; 29-third water inlet pipe; 30-SBR short-range nitrification reaction 31-the fourth water inlet pipe; 32-the fifth peristaltic pump; 33-the sixth peristaltic pump; 34-the second return pipe; 35-the fourth peristaltic pump; 36-aeration head; 37-heating water tank; 38- Aeration pipe; 39-temperature-controlled heating belt device; 40-cylindrical sludge bed; 41-top sealing plate;

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

As shown in Figure 1, the combined denitrification device for landfill leachate SBR and anammox of the present utility model includes an integrated water tank 1, an SBR short-range nitrification reactor 30, and anammox reactor 15; the integrated water tank includes the original The water tank 2, the rear water tank 3, the front water tank 4 and the heating water tank 37 placed in the middle of the original water tank 2, the rear water tank 3 and the front water tank 4, the heating water tank is provided with a temperature control heating device 7; the original water tank 2 passes through the first A water inlet pipe 22 and the first peristaltic pump 21 are connected to the front water tank 4, and the raw water tank 2 is connected to the anaerobic ammonium oxidation reactor 15 through the fourth water inlet pipe 31 and the seventh peristaltic pump 25; the front water tank in the integrated water tank The water tank 4 communicates with the fourth peristaltic pump 35 and the SBR short-path nitrification reactor 30 through the second water inlet pipe 8, and the SBR short-path nitrification reactor 30 is connected with the rear water tank 3 through the first water outlet pipe 26 and the fifth peristaltic pump 32 , the rear water tank 3 is connected with the bottom of the anammox reactor 15 through the third water inlet pipe 29 and the third peristaltic pump 24, and the anammox reactor 15 is provided with the second return pipe 34 and the sixth peristaltic pump 33. For self-circulation, the anammox reactor 15 is connected with the first return pipe 27 and the front water tank 4 through the second peristaltic pump 23;

The SBR short-range nitrification reactor 30 is provided with several first sampling valves 12 from top to bottom, the second water inlet pipe 8 is provided with a water inlet control valve 5; the first water outlet pipe 26 is provided with a drain valve 6; the SBR short-range nitrification reactor 30 is provided with a mechanical stirring device 11; an aeration head 36 is provided at the bottom of the SBR short-path nitrification reactor 30, and the aeration head 36 is connected with the aeration pump 28 through an aeration pipe 38, and the aeration pipe 38 is provided with a first gas flow rate Count 10; SBR short-range nitrification reactor 30 is matched with DO meter 9, ORP meter 13 and pH meter 14;

The anammox reactor 15 is provided with a temperature-controlled heating belt device 39 and a cylindrical sludge bed 40, and the upper part of the anammox reactor 15 is provided with a three-phase separator 17 and a top sealing plate 41, the three-phase separator 17 The upper part of the lye bottle 18 and the second gas flowmeter 19 are communicated; the supernatant liquid on the upper part of the cylindrical sludge bed 40 enters the bottom of the cylindrical sludge bed 40 through the sixth peristaltic pump 33 and circulates; the cylindrical sludge bed 40 is circulated; Part of the overflow water at the top of the mud bed 40 is discharged through the second outlet pipe 20, and part of it flows back to the front water tank 4. The anammox reactor 15 is provided with several second sampling valves 16 connected up and down with the sludge bed. the

Wherein, the integrated water tank 1 has a total volume of 52L and is divided into four parts, wherein the volumes of the raw water tank 2, the front water tank 4, the rear water tank 3, and the heating water tank 37 are 30L, 10L, 10L, and 2L respectively. The SBR short-path nitrification reactor 30 has an inner diameter of 12 cm, an outer diameter of 13 cm, a height of 40 cm, and a total effective volume of 4.5 L. The anammox reactor 15 is cylindrical and made of plexiglass. The inner diameter, outer diameter and height of the upper part are 80mm, 90mm and 450mm respectively, and the inner diameter, outer diameter and height of the lower part are 60mm, 70mm and 1450mm respectively. Parts are connected by a truncated plexiglass tube with a height of 50mm and an effective volume of 5.5L. The anaerobic ammonium oxidation reactor 15 is provided with a three-phase separator, the distance from the top is 200 mm, and starting from the bottom of the reactor, 5 sampling ports are arranged on the side wall at every interval of 200 mm. the

The leachate from a landfill in Beijing was taken. The ammonia nitrogen concentration was as high as 2200mg/L, and COD/NH ₄ ⁺ -N=1.4, which is a typical late-stage landfill leachate. The specific method is:

Step 1: Start the SBR short-cut nitrification reactor 30: Inject the nitrification sludge of the actual urban sewage treatment plant into the SBR short-cut nitrification reactor 30 with the sludge concentration of 5000kg MLSS/m ³ The landfill leachate is the stock solution and is diluted with tap water and injected into the front water tank 4, and the front water tank pumps the diluted leachate into the SBR short-range nitrification reactor 30 through the second water inlet pipe 8 and the fourth peristaltic pump 35; The aeration system composed of the aeration head 36, the aeration pump 28 and the aeration pipe 38 nitrifies the landfill leachate flowing into the SBR short-range nitrification reactor 30. During the reaction process, the dissolved oxygen DO is maintained at about 2 mg/L, and the pH value is maintained at About 7.8, if the pH is too high or too low, then add NaHCO ₃ to keep the pH value in this range, and maintain the NH ₄ ⁺ -N load of the SBR short-range nitrification reactor 30 by adjusting the fourth peristaltic pump 30. ALR= 0.4kgNH ₄ ⁺ -N/m ³ d or so, the average free ammonia FA concentration in the SBR short-cut nitrification reactor 30 is 18mg/L by keeping the pH value and ALR at the above-mentioned values; run the SBR short-cut nitrification reactor under the above-mentioned conditions 30. When the accumulation rate of nitrite nitrogen NO ₂ ^- -N in the effluent is greater than 95%, the SBR short-range nitrification can be realized and maintained, and the influent water quality requirements of the anaerobic ammonium oxidation reactor are met;

Step 2: start the anammox reactor 15: add the sludge with a certain anammox activity in the pilot anammox reactor of a certain sewage treatment plant to the anammox reactor 15, and the sludge The mud concentration is 5kg MLSS/m ³ ; the anaerobic ammonium oxidation reactor 15 makes the temperature control at 35°C through the temperature control heating belt device 39, and the effluent of the SBR short-range nitrification reactor 30 and the stock solution of the leachate are diluted with tap water to make it nitrous The concentrations of state nitrogen and ammonia nitrogen are both maintained at 100 mg/L, and the above-mentioned mixed water after dilution is pumped into the anammox reactor ₁₅ according to a flow rate of 20 L/d ^; When the -N and NO ₂ ^- -N concentrations are both less than 15mg/L, the anammox reaction can be realized and maintained;

Step 3: After the SBR short-range nitrification reactor 30 and the anammox reactor 15 are started respectively, they are operated in series: the water filling ratio of the SBR short-range nitrification reactor 30 is 1:1, and the garbage in the raw water tank 2 The mixture of the leachate and the effluent return liquid of the anammox reactor 15 is pumped into the front water tank 4 through the first peristaltic pump 21 and the second peristaltic pump 23, and the outlet water in the front water tank 4 is pumped in through the fourth peristaltic pump 35 SBR short-range nitrification reactor 30, in the SBR short-range nitrification reactor 30, the carbon source of the leachate is firstly used as the carbon source of denitrification for denitrification, and the oxidation-reduction potential ORP gradually decreases until a plateau appears in the denitrification stage, and the pH value rises at the same time When the highest point is no longer changed, turn off the mechanical stirring device 11 of the SBR short-path nitrification reactor 30 at this time, stop anoxic stirring, stop denitrification, and then open the aeration pump 28 to carry out aeration nitrification, along with the generation of acid in the nitrification process , the pH decreases gradually. When the ammonia nitrogen is consumed, the nitrite concentration reaches the maximum value, and then the pH gradually increases due to stripping; at the same time, the DO concentration increases rapidly, and the peak points of ammonia valley and DO appear at pH and DO respectively. On the curve, in addition, the ORP value also increases with the progress of nitrification until the ammonia nitrogen is consumed, and the ORP does not change with the continuation of aeration after the nitrite concentration reaches the maximum value; the appearance of the ORP platform indicates that nitrate and nitrous acid Salt no longer increases, nitrification ends, at this moment, stop aeration, close aeration pump 28; Water tank 3; the outlet water in the rear water tank 3 is pumped in from the bottom of the anammox reactor 15 through the third peristaltic pump 24, and when NO ₂ ^- -N/NH ₄ ⁺ -N>1.32, it is appropriately increased to enter from the raw water tank 2 The flow of the anammox reactor 15, on the contrary when NO ₂ ^- -N/NH ₄ ⁺ -N<1.32, appropriately reduce the flow from the raw water tank into the anammox reactor 15; the SBR short-path nitrification reactor 30 and the original The nitrification mixed liquid mixed into the water tank 2 enters the anammox reactor 15 through the third peristaltic pump 24 and the seventh peristaltic pump 25 to complete the anammox reaction; when the total nitrogen load of the anammox reactor reaches 0.8kg TN /m ³ d or more, and the removal rate of NH ₄ ⁺ -N and NO ₂ ^- -N in the system effluent is greater than 90%, the system realizes the whole autotrophic denitrification process of landfill leachate.

Under the condition that the average concentration of ammonia nitrogen in the landfill leachate is 2200mg/L and COD/NH ₄ ⁺ -N=1.4, the test results of stable operation show that the accumulation rate of NO ₂ ^- -N in the short-range nitrification reactor of the A/O reactor is 96 % or more, the total nitrogen TN of the system effluent is less than 48mg/L, the TN removal rate is greater than 81%, the effluent NH ₄ ⁺ -N and NO ₂ ^- -N are both less than 16mg/L, and the total nitrogen load of the anaerobic ammonium oxidation UASB is 0.7 About Kg TN/ ^m3 .

The above is a typical embodiment of the utility model, and the implementation of the utility model is not limited thereto. the

Claims (1)

1. A combined denitrification device for landfill leachate SBR and anammox, characterized in that the device includes an integrated water tank (1), an SBR short-path nitrification reactor (30), and anammox reactor (15) ;The integrated water tank includes the original water tank (2), the rear water tank (3), the front water tank (4) and the heating water tank placed between the original water tank (2), the rear water tank (3) and the front water tank (4) (37), the heating water tank is provided with a temperature-controlled heating device (7); the original water tank (2) is connected to the front water tank (4) through the first water inlet pipe (22) and the first peristaltic pump (21), and the original water tank (2) communicate with the anammox reactor (15) through the fourth water inlet pipe (31) and the seventh peristaltic pump (25); the front water tank (4) in the integrated water tank passes through the second water inlet pipe (8 ) is connected with the fourth peristaltic pump (35) and the SBR short-range nitrification reactor (30), and the SBR short-range nitrification reactor (30) is connected with the rear water tank ( 3) are connected, the rear water tank (3) is connected to the bottom of the anammox reactor (15) through the third water inlet pipe (29) and the third peristaltic pump (24), and the anammox reactor (15) The second return pipe (34) and the sixth peristaltic pump (33) are provided for self-circulation, and the anammox reactor (15) connects the first return pipe (27) and the front The water tanks (4) are connected; The SBR short-range nitrification reactor (30) is provided with several first sampling valves (12) from top to bottom, the second water inlet pipe (8) is provided with water inlet control valve (5); the first water outlet pipe (26) is provided with There is a drain valve (6); the SBR short-range nitrification reactor (30) is provided with a mechanical stirring device (11); the bottom of the SBR short-range nitrification reactor (30) is provided with an aeration head (36), and the aeration head (36) is connected with The aeration pump (28) is connected through the aeration pipe (38), and the first gas flow meter (10) is provided on the aeration pipe (38); the SBR short-range nitrification reactor (30) is matched with a DO meter (9), ORP meter (13) and pH meter (14); The anammox reactor (15) is equipped with a temperature-controlled heating belt device (39) and a cylindrical sludge bed (40), and the upper part of the anaerobic ammonium oxidation reactor (15) is equipped with a three-phase separator (17) and top The sealing plate (41), the upper part of the three-phase separator (17) communicates with the lye bottle (18) and the second gas flow meter (19); the supernatant in the upper part of the cylindrical sludge bed (40) passes through the sixth The peristaltic pump (33) enters the bottom of the cylindrical sludge bed (40) for circulation; part of the overflow water from the top of the cylindrical sludge bed (40) is discharged through the second outlet pipe (20), and part of it is returned to the front water tank ( 4), outside the anaerobic ammonium oxidation reactor (15), there are several second sampling valves (16) connected up and down with the sludge bed. the

Images