Device capable of accelerating starting and stable operation of landfill leachate anaerobic ammonia oxidation process

Abstract

The utility model provides a device capable of accelerating starting and stable operation of a landfill leachate anaerobic ammonia oxidation process. The device comprises a landfill leachate biochemical treatment unit, a microorganism screening device and an incubator, the microorganism screening device is arranged outside the landfill leachate biochemical treatment unit; and the incubator is arranged in the aerobic tank. According to the device capable of accelerating the starting and stable operation of the landfill leachate anaerobic ammonia oxidation process provided by the utility model, an outer auxiliary facility and an inner auxiliary facility are additionally arranged on the basis of the landfill leachate biochemical treatment unit 1; wherein the external auxiliary facility is a microorganism screening device; the inner auxiliary facility is an incubator; through the two methods, the landfill leachate anaerobic ammonia oxidation treatment process can be rapidly started, stable operation of the landfill leachate anaerobic ammonia oxidation treatment process can be maintained, the anaerobic ammonia oxidation system can be rapidly recovered after instability, the biochemical total nitrogen removal capacity of the system is improved, carbon source addition is saved, and the operation cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and particularly relates to a device capable of accelerating the start-up and stable operation of the anaerobic ammonia oxidation process of landfill leachate. Background Art

[0002] The ammonia nitrogen and total nitrogen concentrations of landfill leachate are very high, basically exceeding 1000 mg / L. In the prior art, biochemical treatment methods are usually used to treat landfill leachate. However, in the prior art, the high-concentration influent ammonia nitrogen has an inhibitory effect on the biochemical system, and the high-concentration nitrite produced after nitrification is toxic to the biochemical system, showing that the biochemical treatment process of landfill leachate operates unstably, the system is prone to instability, and the operation control difficulty is greatly increased. Content of the Utility Model

[0003] Aiming at the defects existing in the prior art, the utility model provides a device capable of accelerating the start-up and stable operation of the anaerobic ammonia oxidation process of landfill leachate, which can effectively solve the above problems.

[0004] The technical solution adopted by the utility model is as follows:

[0005] The utility model provides a device capable of accelerating the start-up and stable operation of the anaerobic ammonia oxidation process of landfill leachate, including a landfill leachate biochemical treatment unit (1), a microorganism screening device (2) and an incubator (3);

[0006] The landfill leachate biochemical treatment unit (1) includes a denitrification tank (4), an aerobic tank (5) and a membrane tank (6); the inlet of the denitrification tank (4) is communicated with a sewage inlet pipeline (9); the outlet of the denitrification tank (4) is communicated with the inlet of the aerobic tank (5); the outlet of the aerobic tank (5) is communicated with the inlet of the membrane tank (6);

[0007] The microorganism screening device (2) is arranged outside the landfill leachate biochemical treatment unit (1); the sludge inlet of the microorganism screening device (2) is communicated with the middle-section sludge discharge outlet of the membrane tank (6) through an intermediate-section sludge conveying pipeline; a sludge lift pump (8) is installed on the intermediate-section sludge conveying pipeline; the microorganism screening device (2) is configured with a surplus sludge discharge pipeline (14) and a high-activity sludge reflux pipeline (13), and the other end of the high-activity sludge reflux pipeline (13) is communicated with the sludge reflux port of the aerobic tank (5);

[0008] The incubator (3) is installed inside the aerobic tank (5).

[0009] Preferably, a plurality of the incubators (3) are installed inside the aerobic tank (5), and the layout density of the incubators (3) is 1 unit / 5 - 10 m 2。

[0010] Preferably, the incubator (3) includes an incubation culture tank, an incubator lift pump (7), and a microbial population discharge port; the water inlet of the incubation culture tank is communicated with the incubator lift pump (7); the incubation culture tank is communicated with a plurality of the microbial population discharge ports.

[0011] Preferably, the membrane tank (6) is also communicated with the first reflux port of the denitrification tank (4) through a sludge-water reflux pipe (12); a sludge-water reflux pump (16) is installed on the sludge-water reflux pipe (12).

[0012] Preferably, the aerobic tank (5) is also communicated with the first reflux port of the denitrification tank (4) through a mixed liquor reflux pipe (11); a mixed liquor reflux pump (15) is installed on the mixed liquor reflux pipe (11).

[0013] Preferably, the membrane tank (6) is communicated with a sewage discharge pipeline (10).

[0014] The device for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate provided by the present utility model has the following advantages:

[0015] The device for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate provided by the present utility model adds external auxiliary facilities and internal auxiliary facilities on the basis of the landfill leachate biochemical treatment unit 1; among them, the external auxiliary facility is a microbial screening device; the internal auxiliary facility is an incubator; through the above two methods, the anaerobic ammonium oxidation treatment process of landfill leachate can be quickly started, the stable operation of the anaerobic ammonium oxidation treatment process of landfill leachate can be maintained, the anaerobic ammonium oxidation system can be quickly restored after instability, the biochemical total nitrogen removal capacity of the system can be improved, the carbon source addition can be saved, and the operation cost can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the device for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate provided by the present utility model.

[0017] Wherein: 1 - landfill leachate biochemical treatment unit, 2 - microbial screening device, 3 - incubator, 4 - denitrification tank, 5 - aerobic tank, 6 - membrane tank, 7 - incubator lift pump, 8 - sludge lift pump, 9 - sewage inlet pipeline, 10 - sewage discharge pipeline, 11 - mixed liquor reflux pipe, 12 - sludge-water reflux pipe, 13 - high-activity sludge reflux pipeline, 14 - surplus sludge discharge pipeline, 15 - mixed liquor reflux pump, 16 - sludge-water reflux pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] Referring to Figure 1 , the present utility model provides a device capable of accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate, including a landfill leachate biochemical treatment unit 1, a microorganism screening device 2 and an incubator 3;

[0020] The landfill leachate biochemical treatment unit 1 includes a denitrification tank 4, an aerobic tank 5 and a membrane tank 6; the inlet of the denitrification tank 4 is connected to the sewage inlet pipeline 9; the outlet of the denitrification tank 4 is connected to the inlet of the aerobic tank 5; the outlet of the aerobic tank 5 is connected to the inlet of the membrane tank 6; the membrane tank 6 is connected to a sewage discharge pipeline 10.

[0021] A microorganism screening device 2 is arranged outside the landfill leachate biochemical treatment unit 1; the sludge inlet of the microorganism screening device 2 is connected to the middle-section sludge discharge port of the membrane tank 6 through an intermediate-section sludge conveying pipeline; a sludge lift pump 8 is installed on the intermediate-section sludge conveying pipeline; the microorganism screening device 2 is equipped with a surplus sludge discharge pipeline 14 and a high-activity sludge reflux pipeline 13, and the other end of the high-activity sludge reflux pipeline 13 is connected to the sludge reflux port of the aerobic tank 5;

[0022] An incubator 3 is installed inside the aerobic tank 5. A plurality of incubators 3 are installed inside the aerobic tank 5, and the layout density of the incubators 3 is 1 unit / 5 - 10 m 2 . The incubator 3 includes an incubation culture box, an incubator lift pump 7 and a microorganism group discharge port; the water inlet of the incubation culture box is connected to the incubator lift pump 7; the incubation culture box is connected to a plurality of microorganism group discharge ports.

[0023] The membrane tank 6 is also connected to the first reflux port of the denitrification tank 4 through a sludge-water reflux pipe 12; a sludge-water reflux pump 16 is installed on the sludge-water reflux pipe 12. The aerobic tank 5 is also connected to the first reflux port of the denitrification tank 4 through a mixed liquor reflux pipe 11; a mixed liquor reflux pump 15 is installed on the mixed liquor reflux pipe 11.

[0024] The working process and principle of the device provided by the present utility model for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate are as follows:

[0025] (1) The landfill leachate to be treated enters the denitrification tank 4 through the sewage inlet pipeline 9; the denitrification tank 4 performs denitrification treatment on the landfill leachate, and the treated landfill leachate flows into the aerobic tank 5;

[0026] (2) In the aerobic tank 5, anaerobic ammonium oxidation bacteria are used to react with the organic pollutants in the landfill leachate to decompose and consume the organic pollutants;

[0027] In this application, an incubator 3 is additionally installed in the aerobic tank 5, so as to improve the proliferation rate of anaerobic ammonium oxidation bacteria, increase the internal circulation and strengthen the stirring, and improve the decomposition efficiency of organic pollutants. Specifically, the incubator lift pump 7 pumps the mud-water mixture in the aerobic tank 5 and transports it into the incubation and culture tank; the incubation and culture tank generates anaerobic ammonium oxidation bacteria and discharges them back into the aerobic tank 5 through the microbial population discharge port. Therefore, on the one hand, the proliferation rate of anaerobic ammonium oxidation bacteria in the aerobic tank 5 is improved; on the other hand, the internal circulation stirring effect in the aerobic tank 5 can be accelerated, and the contact area between the anaerobic ammonium oxidation bacteria and the mud-water mixture can be further increased, thereby improving the treatment efficiency of organic pollutants.

[0028] (3) The landfill leachate treated by the aerobic tank 5 is transported to the membrane tank 6; the membrane tank 6 separates the mud and water of the landfill leachate, and the intercepted activated sludge is transported to the microbial screening device 2 through the sludge lift pump 8;

[0029] (4) The microbial screening device 2 screens the activated sludge. After screening, the good activated sludge flows back into the aerobic tank 5 through the high-activity sludge return pipeline 13 to supplement the activated sludge in the aerobic tank 5, so that the microorganisms in the activated sludge carry out organic reactions on the landfill leachate in the aerobic tank 5; the poor activated sludge is discharged as surplus sludge through the surplus poor sludge discharge pipeline 14.

[0030] The screening ratio of the microbial screening device 2 is 50-70%, that is, the ratio of the amount of good activated sludge to the amount of poor activated sludge after screening is 1-3:1.

[0031] Through the microbial screening device 2, the good activated sludge is intercepted, and a large amount of anaerobic ammonium oxidation bacteria are contained in the good activated sludge; the poor activated inorganic sludge, heavy metal sludge, and aged sludge with poor coagulation are discharged. Therefore, through the microbial screening device 2, the activated sludge in the aerobic tank 5 is supplemented, and the sludge activity of the system can be improved.

[0032] In addition, under normal operating conditions, the mud-water mixture in the membrane tank 6 is refluxed into the denitrification tank 4 through the mud-water reflux pipe 12; the mixture in the aerobic tank 5 is refluxed into the denitrification tank 4 through the mixture reflux pipe 11, so as to form a continuous reflux state and circulate the treatment of the landfill leachate; finally, the qualified sewage mixture is discharged through the sewage discharge pipeline 10.

[0033] A device provided by the utility model can accelerate the startup and stable operation of the anaerobic ammonium oxidation process for landfill leachate. Based on the biochemical treatment unit 1 of landfill leachate, external auxiliary facilities and internal auxiliary facilities are added. Among them, the external auxiliary facility is a microorganism screening device, and the internal auxiliary facility is an incubator. Through the above two methods, the anaerobic ammonium oxidation treatment process for landfill leachate can be quickly started, the stable operation of the anaerobic ammonium oxidation treatment process for landfill leachate can be maintained, the anaerobic ammonium oxidation system can be quickly restored after instability, the biochemical total nitrogen removal capacity of the system can be improved, the addition of carbon source can be saved, and the operation cost can be saved.

[0034] The above is only the preferred embodiment of the utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. An apparatus capable of accelerating the start-up and stable operation of the anaerobic ammonium oxidation process for landfill leachate, characterized in that, It includes a biochemical treatment unit for landfill leachate (1), a microorganism screening device (2), and an incubator (3); The biochemical treatment unit for landfill leachate (1) includes a denitrification tank (4), an aerobic tank (5), and a membrane tank (6); the inlet of the denitrification tank (4) is connected to the sewage inlet pipeline (9); the outlet of the denitrification tank (4) is connected to the inlet of the aerobic tank (5); the outlet of the aerobic tank (5) is connected to the inlet of the membrane tank (6); The microorganism screening device (2) is arranged outside the biochemical treatment unit for landfill leachate (1); the sludge inlet of the microorganism screening device (2) is connected to the middle-section sludge discharge outlet of the membrane tank (6) through the middle-section sludge transfer pipeline; a sludge lift pump (8) is installed on the middle-section sludge transfer pipeline; the microorganism screening device (2) is configured with a surplus sludge discharge pipeline (14) and a highly active sludge reflux pipeline (13), and the other end of the highly active sludge reflux pipeline (13) is connected to the sludge reflux port of the aerobic tank (5); The incubator (3) is installed inside the aerobic tank (5).

2. The device for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate according to claim 1, wherein A plurality of the incubators (3) are installed inside the aerobic tank (5), and the arrangement density of the incubators (3) is 1 unit per 5 - 10 m 2 .

3. A device capable of accelerating the start-up and stable operation of the anaerobic ammonium oxidation process for landfill leachate, according to claim 1, characterized in that, The incubator (3) includes an incubation culture box, an incubator lift pump (7), and a microorganism group discharge port; the water inlet of the incubation culture box is connected to the incubator lift pump (7); the incubation culture box is connected to a plurality of the microorganism group discharge ports.

4. A device capable of accelerating the start-up and stable operation of the anaerobic ammonium oxidation process for landfill leachate, characterized in that, The membrane tank (6) is also connected to the first reflux port of the denitrification tank (4) through a sludge-water reflux pipe (12); a sludge-water reflux pump (16) is installed on the sludge-water reflux pipe (12).

5. The device for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate according to claim 1, characterized in that, The aerobic tank (5) is also connected to the first reflux port of the denitrification tank (4) through a mixed liquid reflux pipe (11); a mixed liquid reflux pump (15) is installed on the mixed liquid reflux pipe (11).

6. The device for accelerating the start-up and stable operation of the anaerobic ammonium oxidation process of landfill leachate according to claim 1, characterized in that, The membrane tank (6) is connected to a sewage discharge pipeline (10).

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