Microbial extracellular electron strengthening device for hydrolytic acidification system

Abstract

The utility model discloses a microbial extracellular electron strengthening device for a hydrolytic acidification system, which comprises a biological micro-electrolysis reaction tank, an anode filler and a cathode filtering device, and a water inlet pipe is arranged on one side of the biological micro-electrolysis reaction tank close to the bottom end; a water outlet pipe is arranged on one side, far away from the water inlet pipe, of the biological micro-electrolysis reaction tank close to the top end, and a sludge discharge system is arranged in the biological micro-electrolysis reaction tank; the anode filler comprises an anode supporting frame, a plurality of vertically-arranged stainless steel wire ropes are fixed to the anode supporting frame, and a plurality of carbon fiber filler bodies are distributed on the stainless steel wire ropes from top to bottom at equal intervals. According to the utility model, the height adjusting mechanism can actively and accurately adjust the height of the cathode filtering device through the matching of the turntable, the connecting pipe, the push rod motor and other components, so that the cathode filtering device is kept at a proper relative position with the water surface, and the problems of out-of-control height and frequent maintenance caused by filter accumulation in the traditional buoyancy adjusting mode are solved.

Description

Technical Field

[0001] This utility model relates to the field of hydrolysis acidification wastewater treatment technology, and in particular to a microbial extracellular electron enhancement device for a hydrolysis acidification system. Background Technology

[0002] In recent years, hydrolysis acidification technology has been widely used as a pretreatment method for certain biological treatment processes (such as aerobic processes) to treat high-concentration, recalcitrant, and complex wastewater, such as pharmaceutical wastewater, dyeing and printing wastewater, papermaking wastewater, and petrochemical wastewater. Hydrolysis acidification technology utilizes the unique transformation and degradation capabilities of anaerobic microorganisms for certain recalcitrant substances and toxic organic matter to reduce the biotoxicity of wastewater. It also converts recalcitrant macromolecular organic matter into easily biodegradable small molecules, effectively improving the biodegradability of wastewater. Simultaneously, it removes some organic matter, creating stable and excellent influent conditions for subsequent biological treatment.

[0003] However, on the one hand, during the hydrolysis and acidification process, hydrolytic acidifying bacteria participating in substrate oxidation often use H2 as an electron carrier to transfer the electrons they generate to organic pollutants to achieve the reduction of core functional groups. The low solubility of H2 in water greatly limits the electron transfer rate. On the other hand, hydrolytic acidifying bacteria have difficulty degrading organic compounds containing large amounts of heterocyclic or polycyclic compounds. Recent studies have found that microorganisms can directly transfer electrons through redox proteins (such as cytochromes) in the cell membrane or extracellular matrix, or through electrically conductive pili on the cell membrane, with higher efficiency than traditional interspecies electron transfer. Therefore, researchers have developed various methods to improve the efficiency of extracellular electron transfer in anaerobic reactors, such as adding inexpensive and readily available conductive materials (biochar, activated carbon fibers, etc.) to provide a carrier for anaerobic microorganisms and promote extracellular electron transfer efficiency.

[0004] In existing technologies, cathode filtration devices generally float on the water surface through their own buoyancy or by using external buoyant objects. However, the filter material covering the surface of the cathode filtration device increases the overall weight, resulting in insufficient buoyancy. This necessitates more frequent cleaning and maintenance, or the introduction of air into the inflatable float to increase buoyancy. Utility Model Content

[0005] To address the problems mentioned in the background section, this invention provides a microbial extracellular electron enhancement device for a hydrolysis acidification system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A microbial extracellular electron enhancement device for a hydrolysis acidification system includes a biological microelectrolysis reaction cell, an anode packing and a cathode filter. The biological microelectrolysis reaction cell has an inlet pipe on one side near the bottom and an outlet pipe on the side away from the inlet pipe near the top. The biological microelectrolysis reaction cell is equipped with a sludge removal system inside.

[0008] The anode packing includes an anode support frame, on which multiple vertically arranged stainless steel wire ropes are fixed, and multiple carbon fiber packings are distributed at equal intervals from top to bottom on the stainless steel wire ropes.

[0009] Preferably, the biological micro-electrolysis reactor is further provided with a height adjustment mechanism. The height adjustment mechanism is used to adjust the height of the cathode filter device and maintain its relative position with the water surface. The height adjustment mechanism includes a turntable installed on the side wall of the biological micro-electrolysis reactor, the top of the water outlet pipe is bent to a horizontal state and faces the center of the turntable, and is connected to a first connecting pipe through a first rotary joint.

[0010] Preferably, the end of the first connecting pipe away from the first rotary joint passes through the edge of the turntable and extends horizontally into the interior of the biological micro-electrolysis reaction cell, and the first connecting pipe is rotatably connected to the turntable.

[0011] Preferably, a second connecting pipe is rotatably connected to the end of the first connecting pipe away from the first rotary joint. The second connecting pipe and the first connecting pipe are perpendicular to each other. A vertical slide rail is fixed on the inner wall of the biological micro-electrolysis reaction tank. A lifting bracket is slidably installed on the vertical slide rail. A third connecting pipe is fixed on the lifting bracket. One end of the second connecting pipe extends movably into the third connecting pipe.

[0012] Preferably, the end of the third connecting pipe away from the second connecting pipe extends into the interior of the cathode filter and has multiple water inlet holes below it.

[0013] Preferably, a gear is fixed on the turntable, a push rod motor is fixed on the outer wall of the biological micro-electrolysis reaction cell, and a rack is fixed on the output shaft of the push rod motor, with the rack meshing with the gear.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The carbon fiber packing in the anode is conducive to microbial biofilm formation and forms a microcurrent environment, which promotes the enrichment and growth of conductive or electrophilic microorganisms. Through efficient direct electron transfer, it degrades recalcitrant organic matter in water, improves hydrolysis and acidification effects, and effectively treats high-concentration, recalcitrant, and complex wastewater.

[0016] 2. The height adjustment mechanism, through the cooperation of components such as turntable, connecting pipe, push rod motor, etc., can actively and accurately adjust the height of the cathode filter device to maintain a suitable relative position with the water surface, overcoming the problems of height loss and frequent maintenance caused by the accumulation of filter material in traditional buoyancy adjustment methods. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first perspective view of the bio-microelectrolysis reactor of this utility model;

[0019] Figure 2 This is a front-view sectional view of the bio-microelectrolysis reactor of this utility model;

[0020] Figure 3 This is an enlarged view of the distribution of the carbon fiber filler of this utility model on a stainless steel wire rope;

[0021] Figure 4 This is a second perspective view of the bio-microelectrolysis reactor of this utility model;

[0022] Figure 5 This is a third perspective view of the bio-microelectrolysis reactor of this utility model;

[0023] Figure 6 A schematic diagram showing the cathode filter device adjusted to its highest height using the height adjustment mechanism of this utility model.

[0024] Figure 7 A schematic diagram showing the height adjustment mechanism of this utility model adjusting the cathode filter device to the intermediate height.

[0025] In the diagram: 1. Biological micro-electrolysis reactor; 101. Inlet pipe; 2. Outlet pipe; 201. First rotary joint; 202. Turntable; 2021. Gear; 203. First connecting pipe; 2031. Second connecting pipe; 204. Push rod motor; 205. Rack; 3. Cathode filter device; 301. Plastic pipe; 3011. Backwash outlet; 302. Screen filter cover; 4. Anode support frame; 401. Stainless steel wire rope; 402. Carbon fiber packing; 6. Vertical slide rail; 601. Lifting bracket; 602. Third connecting pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example

[0028] Reference Figure 1-7 A microbial extracellular electron enhancement device for a hydrolysis acidification system includes a biological micro-electrolysis reaction tank 1, an anode packing and a cathode filter device 3. An inlet pipe 101 is provided on one side of the biological micro-electrolysis reaction tank 1 near the bottom, and an outlet pipe 2 is provided on the side of the biological micro-electrolysis reaction tank 1 away from the inlet pipe 101 near the top. A sludge discharge system is provided inside the biological micro-electrolysis reaction tank 1.

[0029] The anode packing includes an anode support frame 4, on which multiple vertically arranged stainless steel wire ropes 401 are fixed. Multiple carbon fiber packings 402 are evenly distributed from top to bottom on the stainless steel wire ropes 401. The carbon fiber packings 402 are conducive to microbial biofilm formation and act as the anode of the electric field, forming a microcurrent environment around the anode. This selective formation is conducive to the enrichment and growth of conductive or electrophilic microorganisms, degrading recalcitrant organic matter in the water and achieving better hydrolysis and acidification effects. In the biological micro-electrolysis reactor 1, microorganisms can directly transfer electrons through redox proteins (such as cytochromes) in the cell membrane or extracellular matrix, or through conductive pili on the cell membrane. This process is more efficient than traditional interspecies electron transfer. Wastewater enters through the inlet pipe 101, and the treated water flows out through the outlet pipe 2 after being filtered by the cathode filter device 3, thus continuously treating wastewater.

[0030] The biological micro-electrolysis reactor 1 is also equipped with a height adjustment mechanism. The height adjustment mechanism is used to adjust the height of the cathode filter device 3 and maintain its relative position with the water surface. The height adjustment mechanism includes a turntable 202 installed on the side wall of the biological micro-electrolysis reactor 1. The top of the water outlet pipe 2 is bent to a horizontal state and faces the center of the turntable 202. It is connected to a first connecting pipe 203 through a first rotary joint 201.

[0031] The end of the first connecting pipe 203 furthest from the first rotary joint 201 passes through the edge of the turntable 202 and extends horizontally into the interior of the biological micro-electrolysis reaction cell 1. The first connecting pipe 203 is rotatably connected to the turntable 202. When the turntable 202 rotates counterclockwise (refer to...), Figure 6This can drive the first connecting pipe 203 to follow and move along the arc, thereby lowering the height of the first connecting pipe 203. When rotated 90 degrees counterclockwise, it will rotate to... Figure 7 The height.

[0032] The first connecting pipe 203, with one end away from the first rotary joint 201, passes through the edge of the turntable 202 and extends horizontally into the interior of the biological micro-electrolysis reaction tank 1. The first connecting pipe 203 is rotatably connected to the turntable 202. The end of the first connecting pipe 203 away from the first rotary joint 201 is rotatably connected to the second connecting pipe 2031. The second connecting pipe 2031 is perpendicular to the first connecting pipe 203. A vertical slide rail 6 is fixed on the inner wall of the biological micro-electrolysis reaction tank 1. A lifting bracket 601 is slidably installed on the vertical slide rail 6. A third connecting pipe 602 is fixed on the lifting bracket 601. One end of the second connecting pipe 2031 extends movably into the third connecting pipe 602. The end of the third connecting pipe 602 away from the second connecting pipe 2031 extends into the interior of the cathode filter device 3 and has multiple water inlet holes at the bottom.

[0033] The first connecting pipe 203 is made of Figures 6 to 7 During the transition between the two states, due to the restriction of the second connecting pipe 2031 by the third connecting pipe 602, the second connecting pipe 2031 remains horizontal and moves downwards, and moves horizontally relative to the third connecting pipe 602. At this time, it will drive the third connecting pipe 602 to move vertically downwards, thereby driving the cathode filter device 3 to move vertically downwards. The turntable 202 can drive the cathode filter device 3 to move downwards by rotating counterclockwise, and can drive the cathode filter device 3 to move upwards by rotating clockwise. This achieves active adjustment of the height of the cathode filter device 3, which can easily maintain a suitable relative height between the cathode filter device 3 and the water surface. Compared with the transmission method that relies on the buoyancy of the cathode filter device 3 itself or external buoyancy objects, the height is easier to control. Traditional automatic buoyancy adjustment methods are prone to insufficient buoyancy after a period of use due to the increase in overall weight caused by the filter material covering the surface of the cathode filter device 3. This requires more frequent cleaning and maintenance, or the injection of air into the inflatable float.

[0034] Among them, a gear 2021 is fixed on the turntable 202, and a push rod motor 204 is fixed on the outer wall of the biological micro-electrolysis reaction tank 1. A rack 205 is fixed on the output shaft of the push rod motor 204. The rack 205 meshes with the gear 2021. By controlling the extension and retraction of the push rod motor 204, the rack 205 can be driven to move horizontally. In turn, the meshing of the rack 205 with the gear 2021 can drive the turntable 202 to rotate.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A microbial extracellular electron enhancement device for hydrolytic acidification system, comprising a biological micro-electrolysis reaction tank (1), an anode filler and a cathode filter device (3), characterized in that: One side of the biological micro-electrolysis reaction tank (1) is provided with a water inlet pipe (101) near the bottom end, and the other side of the biological micro-electrolysis reaction tank (1) is provided with a water outlet pipe (2) near the top end, and the inside of the biological micro-electrolysis reaction tank (1) is provided with a sludge discharge system; The anode filler includes an anode support frame (4), and a plurality of stainless steel wire ropes (401) are fixed on the anode support frame (4) and arranged vertically, and a plurality of carbon fiber fillers (402) are equidistantly distributed on the stainless steel wire ropes (401) from top to bottom; The biological micro-electrolysis reaction tank (1) is also provided with a height adjusting mechanism, which is used for adjusting the height of the cathode filter device (3) and maintaining the relative position between the cathode filter device (3) and the water surface, and the height adjusting mechanism includes a rotating disc (202) installed on the side wall of the biological micro-electrolysis reaction tank (1), the top end of the water outlet pipe (2) is bent to a horizontal state and faces the center of the rotating disc (202), and a first connecting pipe (203) is connected through a first rotary joint (201).

2. The microbial extracellular electron enhancement device for hydrolysis acidification system according to claim 1, characterized in that: The first connecting pipe (203) is connected to the rotating disc (202) and extends horizontally into the biological micro-electrolysis reaction tank (1) from the edge of the rotating disc (202).

3. The microbial extracellular electron enhancement device for hydrolysis acidification system according to claim 2, characterized in that: The first connecting pipe (203) is connected to the rotating disc (202) and extends horizontally into the biological micro-electrolysis reaction tank (1) from the edge of the rotating disc (202).

4. The microbial extracellular electron enhancement device for hydrolysis acidification system according to claim 3, characterized in that: The first connecting pipe (203) is connected to the rotating disc (202) and extends horizontally into the biological micro-electrolysis reaction tank (1) from the edge of the rotating disc (202).

5. The microbial extracellular electron enhancement device for hydrolysis acidification system according to claim 4, characterized in that: The third connecting pipe (602) extends to the inside of the cathode filter device (3) and is provided with a plurality of water inlet holes below. The rotating disc (202) is fixed with a gear (2021), and the outer wall of the biological micro-electrolysis reaction tank (1) is fixed with a push rod motor (204), the output shaft of the push rod motor (204) is fixed with a rack (205), and the rack (205) is engaged with the gear (2021).

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