Composite biological activated carbon for wastewater treatment and methods for applying it to treat wastewater

Abstract

This invention discloses a composite biological activated carbon for wastewater treatment, comprising biological activated carbon and original bacteria. The biological activated carbon is obtained by first modifying activated carbon to generate acidic groups on its surface, followed by second modification to generate sulfonic acid groups on its surface. The original bacteria are filtered and screened, then mixed with an encapsulating agent to solidify and form adsorption-encapsulation composite immobilized microbial particles, which are then combined with the modified biological activated carbon. This invention also provides a method for treating wastewater using the above-mentioned composite biological activated carbon. This invention loads the bacterial agent and the required carbon source onto activated carbon, which is beneficial for the reproduction of microbial communities, allowing the modified treatment agent to fully contact pollutants in the wastewater while improving the adsorption of pollutants.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a composite biological activated carbon for wastewater treatment and a method for treating wastewater using the same. Background Technology

[0002] In the process of nitrogen and phosphorus removal by microbial communities, a large amount of organic carbon source is consumed, and denitrification also requires a certain concentration of organic matter as an electron donor. However, there is a general problem of insufficient carbon source in domestic wastewater and polluted water bodies. Therefore, it is necessary to add additional carbon source to meet the carbon source requirements of microbial phosphorus uptake and denitrification. However, directly adding carbon source may cause the organic carbon content in the water body to be too high in the early stage and too low in the later stage, leading to problems such as imbalance of microbial metabolism, which is not conducive to the growth and reproduction of beneficial microorganisms. Activated carbon, as a carrier of microorganisms, has few surface functional groups and does not contain hydrophilic groups (-COOH, -OH), so its dispersibility in water is poor, which hinders the full contact with pollutants in wastewater. Moreover, it is difficult to form electrostatic interactions with nitrogen-containing substances containing hydrogen bonds and lone pairs of electrons, so it cannot fully exert the adsorption effect of carbon-based carriers on pollutants. Summary of the Invention

[0003] The technical problem of this invention is to provide a composite biological activated carbon for wastewater treatment and a method for treating wastewater using the same. This invention loads the bacterial agent and the required carbon source onto the activated carbon, which is conducive to the reproduction of microbial communities, so that the modified treatment agent can fully contact the pollutants in the wastewater while improving the adsorption of pollutants.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an activated carbon containing a composite bacterial agent for wastewater treatment, comprising biological activated carbon and original bacteria, wherein the biological activated carbon is obtained by first modifying activated carbon to generate acidic groups on its surface, and then performing a second modification treatment to generate sulfonic acid groups on its surface; the original bacteria are filtered and screened, then mixed and solidified with an encapsulating agent to form adsorption-encapsulation composite fixed microbial particles, which are then combined with the modified biological activated carbon.

[0005] A method for treating wastewater using composite biological bacteria and activated carbon includes the following steps:

[0006] 1) Crushing: Place the lumps of activated carbon into the crushing equipment;

[0007] 2) Mix the pulverized activated carbon with the compound microbial agent;

[0008] 3) Stirring: Mix the combined bio-activated carbon with the wastewater.

[0009] The pulverizing equipment includes a mixing tube, a processing tube fixedly installed at the upper end of the mixing tube, a central protrusion fixedly installed inside the processing tube, a permeation plate fixedly installed between the lower end of the processing tube and the central protrusion, a connecting frame horizontally rotatably installed at the upper end of the central protrusion, and a pulverizing component provided on the connecting frame. The pulverizing component removes the obstruction when pulverizing large-volume particles and small-volume particles, so that large-volume and small-volume particles are pulverized simultaneously. A lifting seat is provided at the lower end of the mixing tube, and a stirring component is provided on the lifting seat. The stirring component effectively prevents particles from settling at the bottom during the mixing process. An inlet pipe is fixedly installed on one side of the mixing tube.

[0010] The pulverizing assembly includes a gear ring, a side connecting rod, and an upper mounting shaft. The gear ring is fixedly mounted on the upper end of the mixing tube. The side connecting rod is rotatably mounted on the end of the connecting frame near the gear ring. Multiple sets of side stirring blades are fixedly mounted on the side connecting rod. The upper end of the upper mounting shaft is rotatably mounted on the connecting frame. A horizontally extending upper mounting plate is rotatably mounted on the lower end of the upper mounting shaft. A middle mounting shaft is rotatably mounted on the end of the upper mounting plate away from the upper mounting shaft. A horizontally extending lower mounting plate is rotatably mounted on the lower end of the middle mounting shaft. A lower mounting shaft is rotatably mounted on the end of the lower mounting plate away from the middle mounting shaft. Pulverizing blades are fixedly mounted on the upper mounting shaft, the middle mounting shaft, and the lower mounting shaft. A transmission assembly is provided between the side stirring blades and the upper mounting shaft.

[0011] Furthermore, the transmission assembly includes a transmission rod rotatably mounted on the connecting frame. A movable gear is fixedly mounted on the upper end of the transmission rod, and the movable gear meshes with the gear ring. Transmission gears are fixedly mounted on the transmission rod, the side connecting rod, and the transmission shaft. A transmission chain is sleeved on the transmission gear. A side transmission component is provided between the transmission shaft and the upper mounting shaft. Upper transmission components are provided on the upper mounting shaft and the middle mounting shaft at positions corresponding to the upper mounting plate. Lower transmission components are provided on the middle mounting shaft and the lower mounting shaft at positions corresponding to the lower mounting plate.

[0012] Furthermore, an abrasive block is fixedly installed at the lower end of the side connecting rod, and a plurality of abrasive protrusions are fixedly installed on the lower surface of the abrasive block, with the lower surface of the abrasive protrusions contacting the upper surface of the permeation plate.

[0013] Furthermore, a movable partition is slidably installed at the upper end of the mixing tube, and multiple connection holes are provided on the movable partition. A rotating component is provided at the middle position of the movable partition, and the upper surface of the rotating component is an inclined convex surface.

[0014] Furthermore, the stirring assembly includes a rotary motor, which is fixedly installed inside the lifting seat. The output end of the rotary motor extends to the upper surface of the lifting seat and is fixedly mounted with a drive gear. A connecting shaft is fixedly mounted on the upper surface of the drive gear, and the upper end of the connecting shaft is fixedly connected to the rotating component.

[0015] Furthermore, multiple driven gears are rotatably mounted on the upper surface of the lifting seat. The driven gears mesh with the driving gear. A threaded rod is fixedly mounted on the upper surface of the driven gear. The threaded rod matches the connecting hole. The inner wall of the connecting hole is also provided with a thread. A drive motor is fixedly mounted on the upper end of the intermediate protrusion. The output end of the drive motor is fixedly connected to the connecting frame.

[0016] In this invention, lumps of activated carbon are directly added into the processing tube, where they are pulverized into fine powder. This conversion of lumpy activated carbon into fine powder increases the contact area and reaction rate between the activated carbon and the composite microbial agent, allowing for the rapid production of modified activated carbon for wastewater treatment. The powdered activated carbon falls onto a movable baffle in a mixing tube, where a rotating component mixes the composite microbial agent with the powdered activated carbon. This reaction between the activated carbons modifies them, improving the wastewater treatment effect and quality. Furthermore, the powdered activated carbon has a more sufficient contact area with the wastewater, reducing the loss of activated carbon due to insufficient contact during wastewater treatment. This invention also loads the microbial agent and the required carbon source onto the activated carbon, promoting microbial community growth and ensuring that the modified treatment agent can fully contact pollutants in the wastewater while improving pollutant adsorption. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating a preferred embodiment of a wastewater treatment method using activated carbon containing composite bacterial agents according to the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of the crushing equipment;

[0019] Figure 3 for Figure 2 A partial structural diagram at point A in the middle;

[0020] Figure 4 This is a cross-sectional view of the crushing equipment.

[0021] Figure 5 For the present invention Figure 4 A partial structural diagram at point B in the middle;

[0022] Figure 6 For the present invention Figure 4 A partial structural diagram at point C;

[0023] Figure 7 For the present invention Figure 4 A partial structural diagram at point D;

[0024] Figure 8 This is a schematic diagram of the internal structure of the processing tube in the crushing equipment;

[0025] Figure 9 For the present invention Figure 8 A partial structural diagram at point E in the middle;

[0026] Figure 10 For the present invention Figure 8 A partial structural diagram at point F.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Mixing tube; 2. Lifting seat; 3. Processing tube; 4. Inlet tube; 5. Gear ring; 6. Drive motor; 7. Movable gear; 8. Connecting frame; 9. Side connecting rod; 10. Side stirring blade; 11. Upper mounting shaft; 12. Crushing blade; 13. Middle mounting shaft; 14. Lower mounting shaft; 15. Middle protrusion; 16. Permeation plate; 17. Threaded rod; 18. Connecting shaft; 19. Driven gear; 20. Drive gear; 21. Rotating motor; 22. Movable partition; 23. Rotating component; 24. Connecting hole; 25. Grinding block; 26. Upper mounting plate; 27. Lower mounting plate; 28. Upper transmission component; 29. ​​Lower transmission component; 30. Grinding protrusion; 31. Transmission rod; 32. Side transmission component; 33. Transmission chain; 34. Transmission gear. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention provides activated carbon containing compound bacterial agents for wastewater treatment, comprising biological activated carbon and original bacteria. The biological activated carbon undergoes primary modification treatment to generate acidic groups on the surface of the carbon material, obtaining an intermediate. The intermediate undergoes secondary modification treatment to generate sulfonic acid groups on the surface of the intermediate. The resulting activated carbon can provide a loading environment for microbial communities, facilitating the adsorption, growth, and reproduction of microorganisms. At the same time, it has a large biomass and a large number of bacterial species, which can participate in PACT reactions and also in the treatment of wastewater with high ammonia nitrogen and phosphorus content. The original bacteria (such as anaerobic, facultative, and aerobic bacteria) are screened to filter out strains with strong shock load recovery, short stabilization time, and high decomposition rate. These strains are then mixed with an encapsulating agent and solidified to form immobilized particles, creating adsorption-encapsulation composite immobilized microbial particles. Furthermore, bio-activated carbon with high pore size distribution characteristics is selected from the treated bio-activated carbon and combined with the adsorption-encapsulation composite immobilized microbial particles. This reduces problems such as easy adhesion of microbial particles, high bacterial damage rate, poor biocompatibility, and easy death of bacteria during initial hydraulic disturbance, thereby improving the removal efficiency of COD, ammonia nitrogen, TN, and TP in wastewater.

[0031] Please refer to Figure 1 As shown, the present invention also provides a wastewater treatment method using activated carbon containing composite microbial agents, the method comprising the following structural steps:

[0032] Step S1: Crushing, placing the clumps of activated carbon into the crushing equipment;

[0033] Step S2: Mix the pulverized powdered activated carbon with the compound microbial agent;

[0034] Step S3: Stirring, mix the activated carbon with the wastewater.

[0035] Please refer to further information. Figures 2-10 As shown, the pulverizing equipment includes a mixing tube 1, a processing tube 3 is fixedly installed at the upper end of the mixing tube 1, a middle protrusion 15 is fixedly installed inside the processing tube 3, a permeation plate 16 is fixedly installed between the lower end of the processing tube 3 and the middle protrusion 15, a connecting frame 8 is rotatably installed at the upper end of the middle protrusion 15, and a pulverizing component is provided on the connecting frame 8. The pulverizing component removes the obstruction when pulverizing large-volume particles and small-volume particles, so that large-volume and small-volume particles are pulverized simultaneously. A lifting seat 2 is provided at the lower end of the mixing tube 1, and a stirring component is provided on the lifting seat 2. The stirring component effectively prevents particles from settling at the bottom during the mixing process. An inlet pipe 4 is fixedly installed on one side of the mixing tube 1.

[0036] The crushing assembly includes a gear ring 5, a side connecting rod 9, and an upper mounting shaft 11. The gear ring 5 is fixedly mounted on the upper end of the mixing tube 1. The side connecting rod 9 is rotatably mounted on the end of the connecting frame 8 near the gear ring 5. Multiple sets of side stirring blades 10 are fixedly mounted on the side connecting rod 9. The upper end of the upper mounting shaft 11 is rotatably mounted on the connecting frame 8. The lower end of the upper mounting shaft 11 is rotatably provided with a horizontally extending upper mounting plate 26. The end of the upper mounting plate 26 away from the upper mounting shaft 11 is rotatably mounted with a middle mounting shaft 13. The lower end of the middle mounting shaft 13 is rotatably provided with a horizontally extending lower mounting plate 27. The end of the lower mounting plate 27 away from the middle mounting shaft 13 is rotatably mounted with a lower mounting shaft 14. Crushing blades 12 are fixedly mounted on the upper mounting shaft 11, the middle mounting shaft 13, and the lower mounting shaft 14. A transmission assembly is provided between the side stirring blades 10 and the upper mounting shaft 11.

[0037] The transmission assembly includes a transmission rod 31, which is rotatably mounted on a connecting frame 8. A movable gear 7 is fixedly mounted on the upper end of the transmission rod 31, and the movable gear 7 meshes with a gear ring 5. Transmission gears 34 are fixedly mounted on the transmission rod 31, the side connecting rod 9, and the transmission shaft. A transmission chain 33 is sleeved on the transmission gears 34. A side transmission component 32 is provided between the transmission shaft and the upper mounting shaft 11. Upper transmission components 28 are provided on the upper mounting shaft 11 and the middle mounting shaft 13 at positions corresponding to the upper mounting plate 26. Lower transmission components 29 are provided on the middle mounting shaft 13 and the lower mounting shaft 14 at positions corresponding to the lower mounting plate 27.

[0038] A grinding block 25 is fixedly installed at the lower end of the side connecting rod 9. A plurality of grinding protrusions 30 are fixedly installed on the lower surface of the grinding block 25. The lower surface of the grinding protrusions 30 is in contact with the upper surface of the permeation plate 16.

[0039] A movable partition 22 is slidably installed on the upper end of the mixing pipe 1. Multiple connection holes 24 are provided on the movable partition 22. A rotating component 23 is provided in the middle of the movable partition 22. The upper surface of the rotating component 23 is an inclined convex surface.

[0040] The stirring assembly includes a rotary motor 21, which is fixedly installed inside the lifting seat 2. The output end of the rotary motor 21 extends to the upper surface of the lifting seat 2 and is fixedly installed with a drive gear 20. A connecting shaft 18 is fixedly installed on the upper surface of the drive gear 20, and the upper end of the connecting shaft 18 is fixedly connected to the rotating component 23.

[0041] Multiple driven gears 19 are rotatably mounted on the upper surface of the lifting seat 2. The driven gears 19 mesh with the driving gear 20. A threaded rod 17 is fixedly mounted on the upper surface of the driven gear 19. The threaded rod 17 matches the connecting hole 24. The inner wall of the connecting hole 24 is also provided with a threaded line. A drive motor 6 is fixedly mounted on the upper end of the middle protrusion 15. The output end of the drive motor 6 is fixedly connected to the connecting frame 8.

[0042] In this invention, lumps of activated carbon are directly added into the processing tube 3, where they are pulverized into fine powder. This conversion of lumpy activated carbon into fine powder increases the contact area and reaction rate between the activated carbon and the composite microbial agent, allowing for the rapid acquisition of modified activated carbon for wastewater treatment. The powdered activated carbon falls onto the movable baffle 22 of the mixing tube 1, and the rotating component 23 mixes the composite microbial agent with the powdered activated carbon, causing a reaction between the activated carbons to modify and improve the wastewater treatment effect and quality. Furthermore, the contact area between the powdered activated carbon and the wastewater is more sufficient, reducing the loss of activated carbon due to insufficient contact during wastewater treatment. Loading the microbial agent and the required carbon source onto the activated carbon promotes the growth of microbial communities, enabling the modified treatment agent to fully contact pollutants in the wastewater while improving the adsorption of pollutants.

[0043] The blocky activated carbon is placed inside the processing tube 3. The drive motor 6 is turned on, and the drive motor 6 drives the connecting frame 8 to rotate. The movable gear 7 rotates with the connecting frame 8. The rotation of the movable gear 7 interacts with the gear ring 5. Under the action of the gear ring 5, the movable gear 7 continuously rotates. The rotation of the movable gear 7 drives the transmission rod 31 to rotate. The transmission rod 31 drives the upper transmission shaft and the side connecting rod 9 to rotate through the transmission gear 34 and the transmission chain 33. The rotation of the side connecting rod 9 drives the side stirring blade 10 to rotate. The rotation of the upper transmission shaft, together with the upper transmission component 28 and the lower transmission component 29, drives the middle transmission shaft and the lower transmission shaft to rotate simultaneously. This causes the pulverizing blades on the upper transmission shaft, the middle transmission shaft, and the lower transmission shaft to rotate. The 12 rotating blade crushes the block activated carbon. In other crushing equipment, the large-volume activated carbon isolates the small particles of activated carbon between the gaps. Under the isolation effect of the large-volume activated carbon, the crushing blade 12 can only crush the large-volume activated carbon first and then crush the small-volume activated carbon. The crushing efficiency of activated carbon is limited. In this setting, under the action of the middle protrusion 15, the upper and lower ends are crushed to be on different axes. The small particles fall to the bottom of the processing tube 3 under the action of the middle protrusion 15, so that the bottom grinding block 25 and grinding protrusion 30 crush the small particles. The activated carbon of different volumes is graded and crushed at the same time, which improves the crushing efficiency of activated carbon and shortens the forming time of activated carbon powder.

[0044] The molded powder falls onto the movable partition 22. The rotating motor 21 drives the rotating component 23 to rotate, so that the powder and the compound microbial agent are mixed, thereby improving the adsorption capacity of the activated carbon. Then the lifting seat 2 rises, so that the threaded rod 17 is embedded into the connecting hole 24. Then the rotating motor 21 is turned on again, and the rotating motor 21 drives the threaded rod 17 to rotate. The rotation of the threaded rod 17 drives the partition to move down, and the moving partition causes the activated carbon to fall into the mixing tube 1.

Claims

1. A method for treating wastewater with composite biological activated carbon, comprising the following steps: 1) Crushing: Place the lumps of activated carbon into the crushing equipment; 2) Mixing: Mix the pulverized activated carbon with the compound microbial agent; 3) Stirring: Mix the combined bio-activated carbon with the wastewater. The device is characterized by the following features: a mixing tube is included, a processing tube is fixedly installed at the upper end of the mixing tube, a central protrusion is fixedly installed inside the processing tube, a permeation plate is fixedly installed between the lower end of the processing tube and the central protrusion, a connecting frame is horizontally rotatably installed at the upper end of the central protrusion, a crushing component is provided on the connecting frame, the crushing component removes the obstruction when crushing large-volume particles and small-volume particles, so that large-volume and small-volume particles are crushed simultaneously, a lifting seat is provided at the lower end of the mixing tube, a stirring component is provided on the lifting seat, the stirring component can effectively prevent particles from settling at the bottom during the mixing process, and an inlet tube is fixedly installed on one side of the mixing tube. The pulverizing assembly includes a gear ring, a side connecting rod, and an upper mounting shaft. The gear ring is fixedly mounted on the upper end of the mixing tube. The side connecting rod is rotatably mounted on the end of the connecting frame near the gear ring. Multiple sets of side stirring blades are fixedly mounted on the side connecting rod. The upper end of the upper mounting shaft is rotatably mounted on the connecting frame. A horizontally extending upper mounting plate is rotatably mounted on the lower end of the upper mounting shaft. A middle mounting shaft is rotatably mounted on the end of the upper mounting plate away from the upper mounting shaft. A horizontally extending lower mounting plate is rotatably mounted on the lower end of the middle mounting shaft. A lower mounting shaft is rotatably mounted on the end of the lower mounting plate away from the middle mounting shaft. Pulverizing blades are fixedly mounted on the upper mounting shaft, the middle mounting shaft, and the lower mounting shaft. A transmission assembly is provided between the side stirring blades and the upper mounting shaft.

2. The method for treating wastewater with composite biological activated carbon according to claim 1, characterized in that: The transmission assembly includes a transmission rod rotatably mounted on the connecting frame. A movable gear is fixedly mounted on the upper end of the transmission rod, and the movable gear meshes with the gear ring. Transmission gears are fixedly mounted on the transmission rod, the side connecting rod, and the transmission shaft. A transmission chain is sleeved on the transmission gear. A side transmission component is provided between the transmission shaft and the upper mounting shaft. Upper transmission components are provided on the upper mounting shaft and the middle mounting shaft at positions corresponding to the upper mounting plate. Lower transmission components are provided on the middle mounting shaft and the lower mounting shaft at positions corresponding to the lower mounting plate.

3. The method for treating wastewater according to claim 2, characterized in that: A grinding block is fixedly installed at the lower end of the side connecting rod, and a plurality of grinding protrusions are fixedly installed on the lower surface of the grinding block. The lower surface of the grinding protrusions is in contact with the upper surface of the permeation plate.

4. The method for treating wastewater according to claim 3, characterized in that: A movable partition is slidably installed at the upper end of the mixing tube. The movable partition has multiple connection holes. A rotating component is located in the middle of the movable partition. The upper surface of the rotating component is an inclined convex surface.

5. The method for treating wastewater according to claim 4, characterized in that: The stirring assembly includes a rotary motor, which is fixedly installed inside the lifting base. The output end of the rotary motor extends to the upper surface of the lifting base and is fixedly mounted with a drive gear. A connecting shaft is fixedly mounted on the upper surface of the drive gear, and the upper end of the connecting shaft is fixedly connected to the rotating component.

6. The method for treating wastewater according to claim 5, characterized in that: Multiple driven gears are rotatably mounted on the upper surface of the lifting seat. The driven gears mesh with the driving gear. A threaded rod is fixedly mounted on the upper surface of the driven gear. The threaded rod matches the connecting hole. The inner wall of the connecting hole is also provided with a thread. A drive motor is fixedly mounted on the upper end of the intermediate protrusion. The output end of the drive motor is fixedly connected to the connecting frame.

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