Short-cut denitrification and anaerobic ammonia oxidation stable coexisting low-temperature reactor

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a low-temperature reactor for stable coexistence of short-cut denitrification and anaerobic ammonia oxidation, which not only realizes the synergistic effect of short-cut denitrification and anaerobic ammonia oxidation through a partition design and a heat preservation structure to realize the efficient cooperation of two florae, but also precipitates and preserves sludge, so that the sewage treatment efficiency is improved. A proper growth environment is provided for anaerobic ammonium oxidation flora, and the sufficient number of the flora is ensured; comprising a low-temperature reactor; the device further comprises a heat exchange mechanism, a cleaning mechanism, a precipitation mechanism and a sludge discharging mechanism, the heat exchange mechanism is installed on the low-temperature reactor and facilitates heating of inlet water through waste heat, the cleaning mechanism is installed on the heat exchange mechanism and avoids sludge residue blocking, and the precipitation mechanism is installed on the low-temperature reactor and facilitates sludge precipitation culture of oxygen ammonia oxidizing flora. The sludge discharging mechanism is mounted on the precipitation mechanism and is used for discharging sludge.

Description

Technical Field

[0001] This utility model relates to the technical field of wastewater treatment, and in particular to a low-temperature reactor in which short-cut denitrification and anaerobic ammonia oxidation can coexist stably. Background Technology

[0002] In the field of wastewater treatment technology, a denitrification reactor suitable for low-temperature environments (15-25℃) is developed. Through structural optimization, it achieves stable coexistence of short-cut denitrification and anaerobic ammonia-oxidizing bacteria, thereby improving denitrification efficiency at low temperatures.

[0003] Existing low-temperature reactors, such as the wastewater denitrification reactor disclosed in utility model patent application number 202421329026.6, mainly include a reaction tank, a filter tank, and a retaining plate. The reaction tank is equipped with a filter tank, and the top and bottom sides of the filter tank are provided with grooves. The bottom of the retaining plate is engaged with the top groove of the filter tank, and one side of the retaining plate is engaged with the tank wall of the filter tank. The retaining plate is provided with a wall brush on the side of the retaining plate near the reaction tank and the filter tank wall. In use, the rotation of the stirring shaft drives the first stirring blade inside the filter tank and the retaining plate, causing the wastewater to carry the internal impurities to rotate in the filter tank, accelerating the filtration flow of the wastewater. At the same time, the retaining plate drives the filter tank brush to wash the filter holes of the filter tank, preventing the filter holes from being blocked by impurities and affecting the flow of wastewater.

[0004] However, existing reactors mostly operate with a single process or under mesotemperature conditions, making it difficult to achieve the synergistic effect of short-cut denitrification and anaerobic ammonia oxidation simultaneously at low temperatures. Moreover, the growth of anaerobic ammonia oxidation bacteria is slow, and they are easily lost with the sludge, making it difficult to form a sufficient number of bacteria. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a low-temperature reactor that not only enables short-cut denitrification and anaerobic ammonia oxidation to work synergistically through partitioned design and insulation structure, achieving efficient cooperation between the two bacterial communities, but also allows for sludge sedimentation and retention, providing a suitable growth environment for the anaerobic ammonia oxidation bacteria and ensuring a sufficient number of bacteria.

[0006] This invention relates to a low-temperature reactor for the stable coexistence of short-range denitrification and anaerobic ammonia oxidation, comprising a low-temperature reactor; and further comprising a heat exchange mechanism, a cleaning mechanism, a sedimentation mechanism, and a sludge discharge mechanism. The heat exchange mechanism is installed on the low-temperature reactor to facilitate the use of waste heat to heat the influent. The cleaning mechanism is installed on the heat exchange mechanism to prevent sludge residue from clogging the reactor. The sedimentation mechanism is installed on the low-temperature reactor to facilitate sludge sedimentation and the cultivation of ammonia oxidation bacteria. The sludge discharge mechanism is installed on the sedimentation mechanism to discharge the sludge. The heat exchange mechanism exchanges heat with the wastewater in the low-temperature reactor, and then the wastewater is sprayed into the low-temperature reactor. The cleaning mechanism prevents impurities in the wastewater from clogging the uniform dispersion box. The denitrifying bacteria on the low-temperature reactor convert nitrates into nitrites. The nitrites react with ammonia nitrogen in the wastewater to generate nitrogen gas under the action of anaerobic ammonia oxidation bacteria. The sludge in the wastewater settles in the sedimentation mechanism, facilitating the growth and reproduction of anaerobic ammonia oxidation bacteria. After a certain period of time, the sludge discharge mechanism discharges the sludge from the sedimentation mechanism.

[0007] Preferably, the cryogenic reactor includes an insulated shell, a nitrogen circulation pump, porous polyethylene biological packing material, a flow guide baffle, and a honeycomb ceramic carrier. The bottom of the insulated shell is connected to the ground, and a cavity is provided inside the insulated shell. The nitrogen circulation pump is installed on the insulated shell, and the porous polyethylene biological packing material is installed inside the cavity of the insulated shell. The flow guide baffle is installed inside the cavity of the insulated shell, and the honeycomb ceramic carrier is installed inside the cavity of the insulated shell. The nitrogen circulation pump is started to maintain the anaerobic environment inside the cavity of the insulated shell. The heat exchange mechanism, in conjunction with the cleaning mechanism, sprays out the sewage. The sewage is sprayed onto the porous polyethylene biological packing material, and denitrifying bacteria are loaded on the surface of the porous polyethylene biological packing material. The denitrifying bacteria convert nitrates into nitrites. Then, the sewage flows through the flow guide baffle to the surface of the honeycomb ceramic carrier. Anaerobic ammonia oxidizing bacteria are embedded inside the honeycomb ceramic carrier. Nitrites react with ammonia nitrogen in the sewage inside the honeycomb ceramic carrier to generate nitrogen gas.

[0008] Preferably, the insulation shell is a double-layer structure with an embedded polyurethane foam layer in the interlayer; this structure can keep the internal temperature fluctuation less than 2°C, ensuring that the microbial community is in a suitable growth reaction state.

[0009] Preferably, the heat exchange mechanism includes an inlet pipe, a heat exchange pipe, a sleeve, and a uniform dispersion box. The inlet pipe is internally connected to the sewage transfer pump. The heat exchange pipe is internally connected to the inlet pipe and is coiled and installed inside the cavity of the insulation shell. The sleeve is internally connected to the heat exchange pipe and is installed at the top of the cavity of the insulation shell. The top of the uniform dispersion box is internally connected to the bottom of the sleeve, and the uniform dispersion box has mesh openings. The sewage transfer pump transports sewage into the inlet pipe. The sewage exchanges heat with the sewage being treated inside the cavity of the insulation shell through the heat exchange pipe. Then, the sewage enters the uniform dispersion box through the sleeve and is evenly discharged through the mesh openings of the uniform dispersion box, increasing the contact area with the porous polyethylene biological packing material.

[0010] Preferably, the cleaning mechanism includes a first motor, a first reducer, a first drive shaft, and three sets of cleaning brushes. The bottom end of the first motor is connected to the top end of the insulation shell, the bottom end of the first reducer is connected to the top end of the insulation shell, the first drive shaft is rotatably installed inside the sleeve and longitudinally connected to the first reducer, and the three sets of cleaning brushes are all installed on the first drive shaft. When the first motor is started, the first motor drives the first drive shaft to rotate through the first reducer, and the first drive shaft drives the three sets of cleaning brushes to rotate and clean the mesh on the uniform dispersion box, so as to prevent impurities in the sewage from clogging the mesh.

[0011] Preferably, the sedimentation mechanism includes a sedimentation tank, a hinge, a sealing cover, a handle, a drain pipe, and a valve. The top of the sedimentation tank is connected to the bottom of the insulation shell. The hinge is installed on the sedimentation tank, the sealing cover is installed on the hinge, the handle is installed on the sealing cover, the drain pipe is installed on the sedimentation tank and connected to the interior of the sedimentation tank, and the valve is installed on the drain pipe. After the reaction is completed, the valve is opened, and the upper layer of clear water is discharged through the drain pipe. Sludge and other impurities in the sewage settle in the sedimentation tank, which facilitates the growth and reproduction of anaerobic ammonia oxidizing bacteria and ensures the number of bacteria.

[0012] Preferably, the sludge discharge mechanism includes a second motor, a second reducer, a second drive shaft, and spiral blades. The second motor is installed on the sedimentation tank, the second reducer is installed on the sedimentation tank, the second drive shaft is rotatably installed inside the sedimentation tank and is connected to the second reducer for transmission, and the spiral blades are installed on the second drive shaft. After a long period of treatment, if there is too much sludge, pull the handle to open the sealing cover, start the second motor, and the second motor drives the second drive shaft and spiral blades to rotate through the second reducer. The spiral blades push out the sludge.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: heat exchange mechanism and sewage in low temperature reactor exchange heat, and then the sewage is sprayed into the low temperature reactor. By setting a cleaning mechanism, impurities in the sewage are prevented from clogging the uniform dispersion box. Denitrifying bacteria on the low temperature reactor convert nitrates into nitrites. Nitrites and ammonia nitrogen in sewage generate nitrogen gas under the action of anaerobic ammonia oxidizing bacteria. Sludge in sewage settles in the sedimentation mechanism, which facilitates the growth and reproduction of anaerobic ammonia oxidizing bacteria. After a certain period of time, the sludge discharge mechanism discharges the sludge in the sedimentation mechanism. Attached Figure Description

[0014] Figure 1 This is a cross-sectional axonometric structural schematic diagram of this utility model;

[0015] Figure 2 This is a cross-sectional isometric structural diagram of the cryogenic reactor and heat exchange mechanism of this utility model;

[0016] Figure 3 This is a partially enlarged cross-sectional isometric structural schematic diagram of the cleaning mechanism of this utility model;

[0017] Figure 4 This is a partially enlarged cross-sectional isometric structural schematic diagram of the sedimentation mechanism of this utility model;

[0018] Figure 5 This is an enlarged cross-sectional isometric schematic diagram of the sludge discharge mechanism of this utility model.

[0019] The attached diagram is labeled as follows: 01, Low-temperature reactor; 11, Insulated shell; 12, Nitrogen circulation pump; 13, Porous polyethylene biological packing material; 14, Flow guide baffle; 15, Honeycomb ceramic carrier; 02, Heat exchange mechanism; 21, Inlet pipe; 22, Heat exchange tube; 23, Shell; 24, Uniform dispersion box; 03, Cleaning mechanism; 31, First electric motor; 32, First reducer; 33, First drive shaft; 34, Cleaning brush; 04, Sedimentation mechanism; 41, Sedimentation tank; 42, Hinge; 43, Sealing cover; 44, Handle; 45, Drain pipe; 46, Valve; 05, Sludge removal mechanism; 51, Second electric motor; 52, Second reducer; 53, Second drive shaft; 54, Spiral blade. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example

[0021] This invention relates to a low-temperature reactor for the stable coexistence of short-cut denitrification and anaerobic ammonium oxidation, comprising a low-temperature reactor 01; and further comprising a heat exchange mechanism 02, a cleaning mechanism 03, a sedimentation mechanism 04, and a sludge removal mechanism 05. The heat exchange mechanism 02 is installed on the low-temperature reactor 01 to facilitate the use of waste heat to heat the influent; the cleaning mechanism 03 is installed on the heat exchange mechanism 02 to prevent sludge residue from clogging the reactor; the sedimentation mechanism 04 is installed on the low-temperature reactor 01 to facilitate sludge sedimentation and cultivation of ammonium oxidation bacteria; and the sludge removal mechanism 05 is installed on the sedimentation mechanism 04 to discharge the sludge. The low-temperature reactor 01 includes an insulated shell 11, a nitrogen circulation pump 12, a porous polyethylene biological packing material 13, a flow guide baffle 14, and a honeycomb ceramic carrier 15. The bottom end of the insulated shell 11 is connected to the ground, and the interior of the insulated shell 11 has a cavity. The nitrogen circulation pump 12 is installed on the insulated shell 11, the porous polyethylene biological packing material 13 is installed inside the cavity of the insulated shell 11, the flow guide baffle 14 is installed inside the cavity of the insulated shell 11, and the honeycomb ceramic carrier 15 is installed... Inside the cavity of the insulation shell 11; the insulation shell 11 has a double-layer structure with a polyurethane foam layer embedded in the interlayer; the heat exchange mechanism 02 includes an inlet pipe 21, a heat exchange pipe 22, a sleeve 23, and a uniform dispersion box 24. The inlet pipe 21 is connected to the inside of the sewage transfer pump, the heat exchange pipe 22 is connected to the inside of the inlet pipe 21 and is coiled inside the cavity of the insulation shell 11, and the sleeve 23 is connected to the inside of the heat exchange pipe 22 and is installed at the top of the cavity of the insulation shell 11, uniformly dispersing... The top of the box 24 is connected to the bottom of the sleeve 23, and the mesh is evenly distributed on the box 24; the cleaning mechanism 03 includes a first motor 31, a first reducer 32, a first drive shaft 33 and three sets of cleaning brushes 34. The bottom of the first motor 31 is connected to the top of the insulation shell 11, the bottom of the first reducer 32 is connected to the top of the insulation shell 11, the first drive shaft 33 is rotatably installed in the sleeve 23 and longitudinally connected to the first reducer 32, and the three sets of cleaning brushes 34 are all installed on the first drive shaft 33;During operation, firstly, the nitrogen circulation pump 12 is started to maintain the anaerobic environment inside the cavity of the insulation shell 11. The sewage transfer pump delivers sewage to the inlet pipe 21. The sewage exchanges heat with the sewage being treated inside the cavity of the insulation shell 11 through the heat exchange pipe 22. Then, the sewage enters the uniform dispersion box 24 through the sleeve 23 and is evenly discharged through the mesh of the uniform dispersion box 24, increasing the contact area with the porous polyethylene biological packing material 13. The first motor 31 is started, and the first motor 31 drives the first transmission shaft through the first reducer 32. Rotation 33 drives the first drive shaft 33 to rotate three sets of cleaning brushes 34 to clean the mesh on the uniform dispersion box 24, preventing impurities in the sewage from clogging the mesh. The sewage is sprayed onto the porous polyethylene biological packing 13, whose surface is loaded with denitrifying bacteria. The denitrifying bacteria convert nitrates into nitrites. Then, the sewage flows through the guide baffle 14 to the surface of the honeycomb ceramic carrier 15. Anaerobic ammonia-oxidizing bacteria are embedded inside the honeycomb ceramic carrier 15. Nitrites react with ammonia nitrogen in the sewage inside the honeycomb ceramic carrier 15 to generate nitrogen gas. Example

[0022] like Figures 1 to 5As shown, this utility model discloses a low-temperature reactor for stable coexistence of short-cut denitrification and anaerobic ammonium oxidation, based on Example 1. The sedimentation mechanism 04 includes a sedimentation tank 41, a hinge 42, a sealing cover 43, a handle 44, a drain pipe 45, and a valve 46. The top of the sedimentation tank 41 is connected to the bottom of the insulation shell 11. The hinge 42 is mounted on the sedimentation tank 41, the sealing cover 43 is mounted on the hinge 42, the handle 44 is mounted on the sealing cover 43, the drain pipe 45 is mounted on the sedimentation tank 41 and communicates with the interior of the sedimentation tank 41, and the valve 46 is mounted on the drain pipe 45. The sludge removal mechanism 05 includes a second motor 51. The system consists of a second reducer 52, a second drive shaft 53, and a helical blade 54. A second motor 51 is mounted on the sedimentation tank 41. The second drive shaft 53 is rotatably mounted inside the sedimentation tank 41 and is connected to the second reducer 52. The helical blade 54 is mounted on the second drive shaft 53. During operation, firstly, the nitrogen circulation pump 12 is started to maintain the anaerobic environment within the cavity of the insulation shell 11. The sewage transfer pump transports sewage to the inlet pipe 21. The sewage exchanges heat with the sewage being treated within the cavity of the insulation shell 11 through the heat exchange pipe 22. Then, the sewage passes through the sleeve 23. The wastewater enters the uniform dispersion box 24 and is evenly discharged through the mesh of the uniform dispersion box 24, increasing the contact area with the porous polyethylene biological packing material 13. The first motor 31 is started, and the first motor 31 drives the first drive shaft 33 to rotate through the first reducer 32. The first drive shaft 33 drives three sets of cleaning brushes 34 to rotate and clean the mesh of the uniform dispersion box 24, preventing impurities in the wastewater from clogging the mesh. The wastewater is sprayed onto the porous polyethylene biological packing material 13, where denitrifying bacteria are loaded on the surface. The denitrifying bacteria convert nitrates into nitrites, and then the wastewater flows through the guide baffle 14 into the honeycomb. Anaerobic ammonia-oxidizing bacteria are embedded on the surface of the ceramic carrier 15 and inside the honeycomb ceramic carrier 15. Nitrite reacts with ammonia nitrogen in the sewage to generate nitrogen gas inside the honeycomb ceramic carrier 15. After the reaction is completed, the valve 46 is opened and the upper layer of clear water is discharged through the drain pipe 45. Sludge and other impurities in the sewage settle in the sedimentation tank 41, which facilitates the growth and reproduction of anaerobic ammonia-oxidizing bacteria and ensures the number of bacteria. After a long period of treatment, there is too much sludge. Pull the handle 44 to open the sealing cover 43 and start the second motor 51. The second motor 51 drives the second transmission shaft 53 and the spiral blade 54 to rotate through the second reducer 52. The spiral blade 54 pushes out the sludge.

[0023] The first electric motor 31, the first reducer 32, the second electric motor 51, and the second reducer 52 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cryogenic reactor for the stable coexistence of short-cut denitrification and anaerobic ammonia oxidation, comprising a cryogenic reactor (01); characterized in that, It also includes a heat exchange mechanism (02), a cleaning mechanism (03), a sedimentation mechanism (04), and a sludge discharge mechanism (05). The heat exchange mechanism (02) is installed on the low-temperature reactor (01) to facilitate the use of waste heat to heat the influent. The cleaning mechanism (03) is installed on the heat exchange mechanism (02) to prevent sludge residue from clogging. The sedimentation mechanism (04) is installed on the low-temperature reactor (01) to facilitate sludge sedimentation and cultivation of ammonia-oxidizing bacteria. The sludge discharge mechanism (05) is installed on the sedimentation mechanism (04) to discharge the sludge.

2. The low-temperature reactor with stable coexistence of short-cut denitrification and anaerobic ammonia oxidation as described in claim 1, characterized in that, The cryogenic reactor (01) includes an insulated shell (11), a nitrogen circulation pump (12), a porous polyethylene biological packing (13), a flow guide baffle (14), and a honeycomb ceramic carrier (15). The bottom end of the insulated shell (11) is connected to the ground. The interior of the insulated shell (11) is provided with a cavity. The nitrogen circulation pump (12) is installed on the insulated shell (11). The porous polyethylene biological packing (13) is installed in the cavity of the insulated shell (11). The flow guide baffle (14) is installed in the cavity of the insulated shell (11). The honeycomb ceramic carrier (15) is installed in the cavity of the insulated shell (11).

3. The low-temperature reactor with stable coexistence of short-cut denitrification and anaerobic ammonia oxidation as described in claim 2, characterized in that, It also includes a double-layer structure for the thermal insulation shell (11), with a polyurethane foam layer embedded in the interlayer.

4. The low-temperature reactor with stable coexistence of short-cut denitrification and anaerobic ammonia oxidation as described in claim 2, characterized in that, The heat exchange mechanism (02) includes an inlet pipe (21), a heat exchange pipe (22), a sleeve (23), and a uniform dispersion box (24). The inlet pipe (21) is connected to the inside of the sewage pump. The heat exchange pipe (22) is connected to the inside of the inlet pipe (21) and is coiled and installed in the cavity of the insulation shell (11). The sleeve (23) is connected to the inside of the heat exchange pipe (22) and is installed at the top of the cavity of the insulation shell (11). The top of the uniform dispersion box (24) is connected to the bottom of the sleeve (23) and has mesh openings.

5. The low-temperature reactor with stable coexistence of short-cut denitrification and anaerobic ammonia oxidation as described in claim 4, characterized in that, The cleaning mechanism (03) includes a first motor (31), a first reducer (32), a first drive shaft (33), and three sets of cleaning brushes (34). The bottom end of the first motor (31) is connected to the top end of the insulation shell (11), the bottom end of the first reducer (32) is connected to the top end of the insulation shell (11), the first drive shaft (33) is rotatably installed in the sleeve (23) and longitudinally connected to the first reducer (32), and the three sets of cleaning brushes (34) are all installed on the first drive shaft (33).

6. The low-temperature reactor with stable coexistence of short-cut denitrification and anaerobic ammonia oxidation as described in claim 2, characterized in that, The sedimentation mechanism (04) includes a sedimentation tank (41), a hinge (42), a sealing cover (43), a handle (44), a drain pipe (45), and a valve (46). The top of the sedimentation tank (41) is connected to the bottom of the insulation shell (11). The hinge (42) is installed on the sedimentation tank (41), the sealing cover (43) is installed on the hinge (42), the handle (44) is installed on the sealing cover (43), the drain pipe (45) is installed on the sedimentation tank (41) and is connected to the interior of the sedimentation tank (41), and the valve (46) is installed on the drain pipe (45).

7. The low-temperature reactor with stable coexistence of short-cut denitrification and anaerobic ammonia oxidation as described in claim 6, characterized in that, The sludge discharge mechanism (05) includes a second motor (51), a second reducer (52), a second drive shaft (53), and a spiral blade (54). The second motor (51) is installed on the sedimentation tank (41), the second reducer (52) is installed on the sedimentation tank (41), the second drive shaft (53) is rotatably installed in the sedimentation tank (41) and is connected to the second reducer (52) for transmission, and the spiral blade (54) is installed on the second drive shaft (53).

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