A biological micro-electrolysis reaction system for hydrolytic acidification wastewater treatment

Abstract

The present invention discloses a biological micro-electrolysis reaction system for hydrolytic acidification wastewater treatment, which includes a biological micro-electrolysis reaction tank, an anode filler, and a cathode filtration device. A water inlet pipe is provided at a position near the bottom end on one side of the biological micro-electrolysis reaction tank, and a water outlet pipe is provided at a position near the top end on the side of the biological micro-electrolysis reaction tank away from the water inlet pipe. A sludge discharge system is arranged inside the biological micro-electrolysis reaction tank; the cathode filtration device includes a cuboid frame made of plastic pipes and a screen filter cover. The screen filter cover is wrapped outside the cuboid frame, and one of the six faces of the cuboid frame is not wrapped. The water outlet pipe is communicated with the inside of the cuboid frame. In the present invention, the carbon fiber filler of the anode is beneficial to microbial film formation and forms a micro-current environment, promoting the enrichment growth of conductive or electrophilic microorganisms. Through efficient direct electron transfer, it degrades the refractory organic matter in the water body, improves the hydrolytic acidification effect, and effectively treats high-concentration refractory complex wastewater.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrolytic acidification wastewater treatment, and particularly to a biological microelectrolysis reaction system for hydrolytic acidification wastewater treatment. Background Art

[0002] In recent years, the hydrolytic acidification technology has been widely used as a pretreatment means for some biological treatment processes (such as aerobic processes) in the treatment of high-concentration refractory complex wastewater, such as pharmaceutical wastewater, printing and dyeing wastewater, paper-making wastewater, and petrochemical wastewater. The hydrolytic acidification technology can utilize the unique conversion and degradation ability of anaerobic microorganisms for some refractory substances and toxic organic matters to reduce the biological toxicity of wastewater, convert refractory macromolecular organic matters into small molecular substances that are easily biodegradable, effectively improve the biodegradability of wastewater, and remove part of the organic matters at the same time, which can create stable and excellent influent conditions for subsequent biological treatment.

[0003] However, on the one hand, during the hydrolytic acidification process, the hydrolytic acidifying bacteria participating in substrate oxidation often use H 2 as an electron carrier to transfer the electrons generated by them to organic pollutants to achieve the reduction of core functional groups. The low solubility of H 2 in water greatly limits the electron transfer rate; on the other hand, it is difficult for hydrolytic acidifying bacteria to degrade organic matters containing a large number of heterocyclic or polycyclic organic matters. In recent years, it has been found that microorganisms can carry out direct electron transfer through redox proteins (such as cytochromes) in cell membranes or extracellular matrices, and conductive pili on cell membranes, etc., and its efficiency is higher than that of traditional interspecies electron transfer. Therefore, researchers have developed various methods to improve the extracellular electron transfer efficiency in anaerobic reactors, such as adding cheap and easily available conductive materials (biochar, activated carbon fiber, etc.) to provide carriers for anaerobic microorganisms to promote the extracellular electron transfer efficiency. Summary of the Invention

[0004] In order to solve the problems mentioned in the above background art, the present invention provides a biological microelectrolysis reaction system for hydrolytic acidification wastewater treatment.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A biological microelectrolysis reaction system for hydrolytic acidification wastewater treatment includes a biological microelectrolysis reaction tank, an anode filler, and a cathode filtration device. A water inlet pipe is provided at a position close to the bottom end on one side of the biological microelectrolysis reaction tank, a water outlet pipe is provided at a position close to the top end on the side of the biological microelectrolysis reaction tank away from the water inlet pipe, and a sludge discharge system is provided inside the biological microelectrolysis reaction tank;

[0007] The cathode filtration device includes a cuboid frame made of plastic pipes and a screen filter cover. The screen filter cover wraps around the outside of the cuboid frame, and one of the six sides of the cuboid frame is not wrapped. The water outlet pipe is connected to the inside of the cuboid frame. The bottom of the cathode filtration device is below the water surface, and the top of the cathode filtration device is above the water surface. The anode filler and the cathode filtration device are connected by a copper wire, and the copper wire is connected to an electrochemical workstation.

[0008] Preferably, the anode filler includes an anode support frame, on which a plurality of vertically arranged stainless steel wire ropes are fixed, and a plurality of carbon fiber fillers are equidistantly distributed from top to bottom on the stainless steel wire ropes.

[0009] Preferably, a height adjustment mechanism is further provided in the biological micro-electrolysis reaction tank. The height adjustment mechanism is used to adjust the height of the cathode filtration device to maintain its relative position with respect to the water surface. The height adjustment mechanism includes a turntable installed on the side wall of the biological micro-electrolysis reaction tank. The top end 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. The end of the first connecting pipe away from the first rotary joint penetrates through the edge position of the turntable and extends horizontally into the interior of the biological micro-electrolysis reaction tank, and the first connecting pipe is rotatably connected to the turntable.

[0010] Preferably, the end of the first connecting pipe away from the first rotary joint is rotatably connected to a second connecting pipe. The second connecting pipe is perpendicular to the first connecting pipe. 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 into the third connecting pipe movably. The end of the third connecting pipe away from the second connecting pipe extends into the interior of the cuboid frame and is provided with a plurality of water inlet holes below.

[0011] Preferably, a gear is fixed on the turntable, and a push rod motor is fixed on the outer wall of the biological micro-electrolysis reaction tank. A rack is fixed on the output shaft of the push rod motor, and the rack meshes with the gear.

[0012] Preferably, two vertically arranged first guide rods are fixed at the top end of the lifting bracket. A cross bar is fixed between the top ends of the two first guide rods. A guide sleeve is fixed on the outside of the first guide rod. A floating block is fixed on the guide sleeve. A first spring is provided at the top end of the guide sleeve. Top blocks are provided at the top and bottom ends of the floating block. An upper pressure switch is provided below the cross bar, and a lower pressure switch is provided at the top end of the lifting bracket. The upper pressure switch and the lower pressure switch are used to control the push rod motor.

[0013] Preferably, a flushing switcher is fixed to the top end of a section of the third connecting pipe located inside the cuboid frame. A backwashing pipe is connected to the flushing switcher, a distribution cross pipe is connected to the backwashing pipe, the distribution cross pipe is communicated with the plastic pipe, and a plurality of backwashing water outlet holes are arranged on the plastic pipe.

[0014] Preferably, a lifting disc is movably installed inside the flushing switcher. A lifting rod is fixed to the top end of the lifting disc. A second spring is fixed between the top end of the lifting disc and the inner wall of the top end of the flushing switcher. A first blocking plate is fixed to the bottom end of the lifting disc, and a second blocking plate is fixed to one side of the bottom end of the lifting disc close to the backwashing pipe.

[0015] Preferably, the top end of the lifting rod extends out of the flushing switcher and the screen filter cover movably, and a trigger strip is fixed to the inner wall of the biological microelectrolysis reaction tank. The position of the trigger strip corresponds to that of the lifting rod.

[0016] Preferably, one end of the water inlet pipe extending into the biological microelectrolysis reaction tank is connected with an annular water distribution pipe, and a plurality of water distribution holes are arranged on the annular water distribution pipe.

[0017] Preferably, the sludge discharge system includes a plurality of sludge collection grooves arranged on the inner wall of the bottom end of the biological microelectrolysis reaction tank. A sludge discharge branch pipe is rotatably installed in the sludge collection grooves, and a plurality of blades and sludge discharge holes are arranged on the sludge discharge branch pipe.

[0018] Preferably, one end of the sludge discharge branch pipe extends out of the biological microelectrolysis reaction tank. A sludge discharge main pipe is fixed to the outer part of the biological microelectrolysis reaction tank close to the bottom end. The sludge discharge branch pipe and the sludge discharge main pipe are connected through a second rotary joint. Adjacent sludge discharge branch pipes are synchronously driven by a belt and powered by a first rotary motor.

[0019] Preferably, a scraper is arranged in the biological microelectrolysis reaction tank. The bottom end of the scraper contacts the inner wall of the biological microelectrolysis reaction tank. Connecting rods are fixed to both sides of the top end of the scraper, and the top ends of the connecting rods extend out of the biological microelectrolysis reaction tank.

[0020] Preferably, a horizontal moving strip is fixed between the top ends of the two connecting rods. A second guiding rod is fixed to the top end of the biological microelectrolysis reaction tank, and the second guiding rod movably penetrates through the horizontal moving strip.

[0021] Preferably, a threaded rod is rotatably installed at the top end of the biological microelectrolysis reaction tank. The threaded rod is driven to rotate by a second rotary motor, and the threaded rod penetrates through the horizontal moving strip through a threaded hole.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. High-efficiency electron transfer and degradation: The carbon fiber filler in the anode is conducive to microbial film formation and forms a micro-current environment, promoting the enrichment and growth of conductive or electrophilic microorganisms. Through efficient direct electron transfer, it degrades refractory organic matter in water, improves the hydrolysis acidification effect, and effectively treats high-concentration refractory complex wastewater.

[0024] 2. Optimization of the cathode filtration device: The unique structure of the cathode filtration device and its connection design with the outlet pipe, combined with the use of a specific specification sieve mesh to utilize the capillary action of water to keep it moist for electron absorption, can effectively filter the treated water and prevent blockage, increasing the water inflow.

[0025] 3. Convenient and precise height adjustment: The height adjustment mechanism, through the cooperation of components such as a turntable, connecting pipe, and push rod motor, can actively and precisely adjust the height of the cathode filtration device to maintain an appropriate relative position with the water surface, overcoming the problems of height out-of-control and frequent maintenance caused by the accumulation of filter substances in the traditional buoyancy adjustment method.

[0026] 4. Automatic height maintenance stability: With the linkage of a floating block, guide sleeve, pressure switch, and height adjustment mechanism, it can automatically control the lifting of the cathode filtration device according to its relative height with the water surface, ensuring stable adjustment within a small range and maintaining the stable operation of the system.

[0027] 5. High-efficiency self-cleaning of the sieve mesh filter: The backwashing system composed of a flushing switch, backwashing pipe, distribution cross pipe, and backwashing outlet holes can automatically switch to the backwashing state when the cathode filtration device rises to a specific position, and efficiently clean the sieve mesh filter from the inside to ensure the filtration efficiency.

[0028] 6. Multifunctional and high-efficiency sludge discharge system: The combination of the sludge discharge branch pipe, blade, sludge discharge hole, and sludge discharge main pipe in the sludge discharge system can not only stir and break the sludge to prevent caking and blockage under the drive of the first rotating motor, but also introduce cleaning liquid for backwashing; the scraper can scrape the sludge to the sludge collection groove under the drive of the second rotating motor, threaded rod, etc. The two work together to improve the sludge discharge efficiency and effect, ensuring the normal operation of the reaction tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 is the overall schematic diagram of the present invention;

[0031] Figure 2 is the main perspective cross-sectional view of the biological micro-electrolysis reaction tank of the present invention;

[0032] Figure 3 Enlarged view of the distribution of the carbon fiber filler of the present invention on the stainless steel wire rope;

[0033] Figure 4 Schematic diagram of the distribution of the sludge discharge branch pipe of the present invention;

[0034] Figure 5 Schematic diagram of the bottom view of the biological microelectrolysis reaction tank of the present invention;

[0035] Figure 6 Schematic diagram of the scraper drive of the present invention;

[0036] Figure 7 is Figure 5 Enlarged detail view of position A in;

[0037] Figure 8 Enlarged detail view of the sludge discharge branch pipe of the present invention;

[0038] Figure 9 Schematic diagram of the first perspective of the height adjustment mechanism of the present invention;

[0039] Figure 10 Schematic diagram of the second perspective of the height adjustment mechanism of the present invention;

[0040] Figure 11 Schematic diagram of the state where the height adjustment mechanism of the present invention adjusts the cathode filter device to the highest height;

[0041] Figure 12 Schematic diagram of the state where the height adjustment mechanism of the present invention adjusts the cathode filter device to the middle height;

[0042] Figure 13 Enlarged detail view of the first perspective of the position of the floating block of the present invention;

[0043] Figure 14 Enlarged detail view of the second perspective of the position of the floating block of the present invention;

[0044] Figure 15 Enlarged detail view of the third perspective of the position of the floating block of the present invention;

[0045] Figure 16 Schematic diagram of the internal structure of the flushing switch of the present invention;

[0046] Figure 17 Schematic diagram of the connection relationship between the first sealing plate and the second sealing plate of the present invention;

[0047] In the figure: 1. Biological micro-electrolysis reaction tank; 101. Water inlet pipe; 1011. Annular water distribution pipe; 2. Water 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 filtration device; 301. Plastic pipe; 3011. Backwashing water outlet hole; 302. Screen filter; 4. Anode support frame; 401. Stainless steel wire rope; 402. Carbon fiber filler; 501. Mud collection trench; 502. Mud discharge branch pipe; 5021. Blade; 5022. Mud discharge hole; 503. Mud discharge main pipe; 5031. Second rotary joint; 504. Belt; 505. First rotary motor; 6. Vertical slide rail; 601. Lifting bracket; 6011. First guide rod; 6012. Guide sleeve; 6013. Floating block; 6014. Cross bar; 6015. First spring; 6016. Upper pressure switch; 6017. Top block; 6018. Lower pressure switch; 602. Third connecting pipe; 603. Water inlet hole; 604. Flushing switch; 6041. Lifting disc; 6042. Lifting rod; 6043. Trigger bar; 6044. Second spring; 6045. First plugging plate; 6046. Second plugging plate; 605. Backwashing pipe; 606. Distribution cross pipe; 7. Scraper; 701. Connecting rod; 702. Horizontal moving bar; 703. Second guide rod; 704. Second rotary motor; 705. Threaded rod. Detailed implementation mode

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] Embodiment 1

[0050] Refer to Figures 1-17 , a biological micro-electrolysis reaction system for hydrolytic acidification wastewater treatment, including a biological micro-electrolysis reaction tank 1, anode filler, and a cathode filtration device 3. A water inlet pipe 101 is provided at a position near the bottom on one side of the biological micro-electrolysis reaction tank 1, and a water outlet pipe 2 is provided at a position near the top on the side of the biological micro-electrolysis reaction tank 1 away from the water inlet pipe 101. A mud discharge system is provided inside the biological micro-electrolysis reaction tank 1;

[0051] The cathode filter device 3 includes a rectangular frame composed of a plastic tube 301 and a screen filter cover 302. The screen filter cover 302 is wrapped on the outside of the rectangular frame, and one side of the six faces of the rectangular frame is not wrapped. In order to increase the water intake, the water intake of the cathode filter device 3 and prevent blockage, the outlet pipe 2 is connected to the inside of the rectangular frame. The bottom of the cathode filter device 3 is located below the water surface, and the top of the cathode filter device 3 is located above the water surface. The molecular oxygen in the air can be directly used as an electron acceptor, and its electron receiving capacity is much greater than the combined oxygen or other electron acceptors in the traditional hydrolysis acidification anaerobic or anoxic environment, thereby further accelerating the degradation rate of pollutants. The anode filler and the cathode filter device 3 are connected by a copper wire, and the copper wire is connected to the electrochemical workstation. The screen filter cover 302 uses a stainless steel screen with a mesh size of 20-100. The use of a stainless steel screen of this specification can utilize the capillary action of water to keep the entire stainless steel screen moist, which is beneficial to the electron absorption of the cathode;

[0052] The anode filler comprises an anode support frame 4 , on which a plurality of vertically arranged stainless steel wire ropes 401 are fixed, and on the stainless steel wire ropes 401 , a plurality of carbon fiber fillers 402 are evenly distributed from top to bottom.

[0053] The carbon fiber filler 402 is conducive to the formation of microbial biofilm and acts as the anode of the electric field to form a microcurrent environment around the anode, which is selectively formed to facilitate the enrichment and growth of conductive or electrophilic microorganisms, degrade difficult-to-degrade organic matter in the water body, and better achieve the effect of hydrolysis and acidification. In the biological micro-electrolysis reaction pool 1, microorganisms can directly transfer electrons through redox proteins (such as cytochromes) in the cell membrane or extracellular matrix, conductive pili on the cell membrane, etc., and its efficiency is higher than that of traditional interspecies electron transfer. Wastewater enters through the water inlet pipe 101, and the treated water is filtered by the cathode filter device 3 and then flows out from the water outlet pipe 2, thereby continuously treating the sewage.

[0054] Example 2

[0055] Reference Figures 1-17 The difference between this embodiment and embodiment 1 is that a height adjustment mechanism is further provided in the biological micro-electrolysis reaction pool 1, and the height adjustment mechanism is used to adjust the height of the cathode filter device 3 to 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 reaction pool 1, and the top of the outlet pipe 2 is bent to a horizontal state and faces the center of the turntable 202, and is connected to a first connecting pipe 203 through a first rotating joint 201. One end of the first connecting pipe 203 away from the first rotating joint 201 penetrates from the edge of the turntable 202 and extends horizontally to the inside of the biological micro-electrolysis reaction pool 1, and the first connecting pipe 203 is rotatably connected to the turntable 202. When the turntable 202 rotates counterclockwise (refer to Figure 11( ) It can drive the first connecting pipe 203 to move along the arc line, thereby reducing the height of the first connecting pipe 203. After rotating counterclockwise by 90 degrees, it will rotate to Figure 12 height.

[0056] One end of the first connecting pipe 203 far from the first rotary joint 201 is rotatably connected with a 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 microelectrolysis 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 into the third connecting pipe 602 movably. The end of the third connecting pipe 602 far from the second connecting pipe 2031 extends into the interior of the cuboid frame and a plurality of water inlet holes 603 are opened below;

[0057] During the process of the first connecting pipe 203 converting between Figures 11 to 12 two states, due to the restriction of the third connecting pipe 602 on the second connecting pipe 2031, the second connecting pipe 2031 remains horizontal and moves downward, and moves horizontally relative to the third connecting pipe 602. At this time, it will drive the third connecting pipe 602 to move vertically downward, thereby driving the cathode filtration device 3 to move vertically downward. The cathode filtration device 3 can be driven to move downward by rotating the turntable 202 counterclockwise, and the cathode filtration device 3 can be driven to move upward by rotating the turntable 202 clockwise. Thus, the height of the cathode filtration device 3 can be adjusted actively, and it is convenient to keep the appropriate relative position height between the cathode filtration device 3 and the water surface. Compared with the traditional method of using the buoyancy of the cathode filtration device 3 itself or an external buoyancy object, the height is easier to control. In the traditional buoyancy automatic adjustment method, after using for a period of time, due to the filter material wrapped on the surface of the cathode filtration device 3, the overall weight increases, resulting in insufficient buoyancy, and it is necessary to perform cleaning and maintenance more frequently, or inflate the inflatable floating object with gas.

[0058] A gear 2021 is fixed on the turntable 202. A push rod motor 204 is fixed on the outer wall of the biological microelectrolysis 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 telescopic movement of the push rod motor 204, the rack 205 can be driven to move horizontally, and then the turntable 202 can be driven to rotate through the meshing of the rack 205 and the gear 2021.

[0059] Example 3

[0060] Refer to Figures 1-17, The difference between this embodiment and Embodiment 2 is that two vertically arranged first guide rods 6011 are fixed to the top end of the lifting bracket 601. A cross bar 6014 is fixed between the top ends of the two first guide rods 6011. A guide sleeve 6012 is fixed to the outside of the first guide rod 6011. A floating block 6013 is fixed to the guide sleeve 6012. A first spring 6015 is provided at the top end of the guide sleeve 6012. Top blocks 6017 are provided at both the top and bottom ends of the floating block 6013. An upper pressure switch 6016 is provided below the cross bar 6014. A lower pressure switch 6018 is provided at the top end of the lifting bracket 601. The upper pressure switch 6016 and the lower pressure switch 6018 are used to control the push rod motor 204;

[0061] After the floating block 6013 is completely submerged in water, at this time, the height of the cathode filtration device 3 is too low relative to the water surface. The buoyancy generated by the floating block 6013 will compress the first spring 6015, causing the top block 6017 to touch the upper pressure switch 6016, thereby turning on the upper pressure switch 6016. At this time, the push rod motor 204 will be controlled to extend, and then it can drive the turntable 202 to rotate clockwise, thereby driving the cathode filtration device 3 to move upward. When the floating block 6013 completely leaves the water surface, at this time, the height of the cathode filtration device 3 is too high relative to the water surface. At this time, due to the elastic force of the first spring 6015 plus the gravity of the floating block 6013 itself, it will push the top block 6017 to touch the lower pressure switch 6018, thereby turning on the lower pressure switch 6018. At this time, the push rod motor 204 will be controlled to shorten, and then it can drive the turntable 202 to rotate counterclockwise, thereby driving the cathode filtration device 3 to move downward, thereby achieving the purpose of automatic adjustment and ensuring that the relative position of the cathode filtration device 3 and the liquid level is automatically adjusted within a small range.

[0062] Embodiment 4

[0063] Refer to Figures 1-17 , The difference between this embodiment and Embodiment 3 is that a flushing switch 604 is fixed to the top end of one end of the third connecting pipe 602 located inside the cuboid frame. A backwashing pipe 605 is connected to the flushing switch 604. A distribution cross pipe 606 is connected to the backwashing pipe 605. The distribution cross pipe 606 is communicated with the plastic pipe 301, and a plurality of backwashing water outlet holes 3011 are provided on the plastic pipe 301;

[0064] After being used for a period of time, the mesh filter cover 302 outside the cathode filter device 3 will be blocked, affecting the filtering efficiency. At this time, the mesh filter cover 302 needs to be cleaned. It is only necessary to cut off the water inlet hole 603 through the flushing switch 604 to connect the third connecting pipe 602 with the backwashing pipe 605. At this time, the backwashing liquid is introduced through the outlet pipe 2. The backwashing liquid will enter the plastic pipe 301 after being evenly distributed through the distribution cross pipe 606, and will be sprayed out through each backwashing outlet hole 3011, so as to flush the mesh filter cover 302 from the inside, and the mesh filter cover 302 can be cleaned efficiently.

[0065] Among them, a lifting plate 6041 is movably installed inside the flushing switch 604, a lifting rod 6042 is fixed to the top of the lifting plate 6041, a second spring 6044 is fixed between the top of the lifting plate 6041 and the top inner wall of the flushing switch 604, a first blocking plate 6045 is fixed to the bottom of the lifting plate 6041, and a second blocking plate 6046 is fixed to the side of the bottom of the lifting plate 6041 close to the backwashing pipe 605;

[0066] When the second spring 6044 is in a relaxed state, it will pull the lifting plate 6041 to rise to the highest state. At this time, the second blocking plate 6046 just blocks the backwash pipe 605, and the water inlet hole 603 and the third connecting pipe 602 are connected to each other. At this time, it is a drainage state. When the cathode filter device 3 needs to be cleaned, it only needs to drive the cathode filter device 3 to move upward to the highest state. At this time, the cathode filter device 3 is separated from the water surface, and the top of the lifting rod 6042 is movably extended to the outside of the flushing switch 604 and the screen filter cover 302, and a trigger bar 6043 is fixed on the inner wall of the biological micro-electrolysis reaction cell 1. The position of the trigger bar 6043 corresponds to the lifting rod 6042. The trigger bar 6043 will overcome the elastic force of the second spring 6044 and press the lifting rod 6042 downward, so that the first blocking plate 6045 descends to block the water inlet hole 603, and the second blocking plate 6046 is staggered with the backwash pipe 605. At this time, it is a backwash state, which can achieve the purpose of automatic switching.

[0067] Among them, one end of the water inlet pipe 101 extending to the inside of the biological micro-electrolysis reaction tank 1 is connected to a ring-shaped water distribution pipe 1011, and a plurality of water distribution holes are opened on the ring-shaped water distribution pipe 1011 to achieve the purpose of uniform water distribution.

[0068] Example 5

[0069] Reference Figures 1-17, the difference between this embodiment and Embodiment 1 is that the sludge discharge system includes a plurality of sludge collection grooves 501 provided on the inner wall of the bottom end of the biological micro-electrolysis reaction tank 1. A sludge discharge branch pipe 502 is rotatably installed in the sludge collection groove 501. A plurality of blades 5021 and sludge discharge holes 5022 are provided on the sludge discharge branch pipe 502. One end of the sludge discharge branch pipe 502 extends to the outside of the biological micro-electrolysis reaction tank 1. A sludge discharge main pipe 503 is fixed at a position near the bottom end outside the biological micro-electrolysis reaction tank 1. The sludge discharge branch pipe 502 is connected to the sludge discharge main pipe 503 through a second rotary joint 5031. The adjacent sludge discharge branch pipes 502 are synchronously driven by a belt 504 and powered by a first rotary motor 505;

[0070] The first rotary motor 505 can drive the synchronous rotation of a plurality of sludge discharge branch pipes 502, and the blades 5021 can stir and break the sludge accumulated at the bottom of the biological micro-electrolysis reaction tank 1, so as to prevent the sludge from caking and blocking the sludge discharge holes 5022, ensuring that the sludge can be discharged more smoothly. The cleaning liquid can be introduced into the biological micro-electrolysis reaction tank 1 through the sludge discharge main pipe 503 for backwashing.

[0071] Wherein, a scraper 7 is provided in the biological micro-electrolysis reaction tank 1. The bottom end of the scraper 7 is in contact with the inner wall of the biological micro-electrolysis reaction tank 1. Both sides of the top end of the scraper 7 are fixed with connecting rods 701. The top ends of the connecting rods 701 extend to the outside of the biological micro-electrolysis reaction tank 1. A horizontal moving bar 702 is fixed between the top ends of the two connecting rods 701. A second guide rod 703 is fixed at the top end of the biological micro-electrolysis reaction tank 1. The second guide rod 703 movably penetrates the horizontal moving bar 702. A threaded rod 705 is rotatably installed at the top end of the biological micro-electrolysis reaction tank 1. The threaded rod 705 is driven to rotate by a second rotary motor 704, and the threaded rod 705 penetrates the horizontal moving bar 702 through a threaded hole;

[0072] When the second rotary motor 704 is turned on, it can drive the rotation of the threaded rod 705. With the guiding action of the second guide rod 703, the horizontal moving bar 702 can be driven to move horizontally, and then the scraper 7 can be driven to move horizontally, so as to scrape the sludge accumulated at the bottom of the biological micro-electrolysis reaction tank 1, and the sludge can be scraped into the sludge collection groove 501, which can improve the sludge discharge efficiency and effect.

[0073] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by 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. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0074] In the present invention, unless otherwise clearly specified and defined, the terms "set", "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] The control mode of the present invention is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The provision of power also belongs to the common general knowledge in the art. And the present invention is mainly used to protect mechanical devices, so the control mode and circuit connection of the present invention will not be further explained in detail.

[0076] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A bio-micro-electrolysis reaction system for treating hydrolysis acidified wastewater, comprising a bio-micro-electrolysis reaction cell (1), an anode filler and a cathode filtration device (3), characterized in that: A water inlet pipe (101) is provided on one side of the biological micro-electrolysis reaction pool (1) near the bottom, a water outlet pipe (2) is provided on the side of the biological micro-electrolysis reaction pool (1) away from the water inlet pipe (101) near the top, and a mud discharge system (5) is provided inside the biological micro-electrolysis reaction pool (1); The cathode filter device (3) comprises a rectangular parallelepiped frame formed of a plastic tube (301) and a screen filter cover (302); the screen filter cover (302) is wrapped around the outside of the rectangular parallelepiped frame, and one side of the six faces of the rectangular parallelepiped frame is not wrapped; the water outlet pipe (2) is connected to the inside of the rectangular parallelepiped frame; the bottom of the cathode filter device (3) is located below the water surface; the top of the cathode filter device (3) is located above the water surface; the anode filler and the cathode filter device (3) are connected via a copper wire, and the copper wire is connected to an electrochemical workstation; The biological micro-electrolysis reaction pool (1) is also provided with a height adjustment mechanism, which is used to adjust the height of the cathode filter device (3) to maintain its relative position with the water surface, and the height adjustment mechanism comprises a turntable (202) mounted on the side wall of the biological micro-electrolysis reaction pool (1), the top end of the water outlet pipe (2) is bent to a horizontal state and faces the center of the turntable (202), and is connected to a first connecting pipe (203) via a first rotating joint (201), an end of the first connecting pipe (203) away from the first rotating joint (201) passes through the edge of the turntable (202) and extends horizontally to the inside of the biological micro-electrolysis reaction pool (1), and the first connecting pipe (203) is rotatably connected to the turntable (202); The end of the first connecting tube (203) away from the first rotating joint (201) is rotatably connected to the second connecting tube (2031), the second connecting tube (2031) and the first connecting tube (203) are perpendicular to each other, a vertical slide rail (6) is fixed on the inner wall of the biological micro-electrolysis reaction pool (1), a lifting bracket (601) is slidably mounted on the vertical slide rail (6), a third connecting tube (602) is fixed on the lifting bracket (601), one end of the second connecting tube (2031) movably extends into the third connecting tube (602), one end of the third connecting tube (602) away from the second connecting tube (2031) extends to the inside of the rectangular parallelepiped frame and a plurality of water inlet holes (603) are provided at the bottom, the turntable (202) can drive the cathode filter device (3) to move downward by rotating counterclockwise, and the turntable (202) can drive the cathode filter device (3) to move upward by rotating clockwise; A gear (221) is fixed on the rotating disk (202), a push rod motor (204) is fixed on the outer wall of the biological micro-electrolysis reaction cell (1), a rack (205) is fixed on the output shaft of the push rod motor (204), and the rack (205) is meshed with the gear (2021); A flushing switch (604) is fixed to the top of a section of the third connecting pipe (602) located inside the rectangular parallelepiped frame, and a backwashing pipe (605) is connected to the flushing switch (604); A lifting plate (6041) is movably installed inside the flushing switch (604), a lifting rod (6042) is fixed to the top of the lifting plate (6041), a second spring (6044) is fixed between the top of the lifting plate (6041) and the inner wall of the top of the flushing switch (604), a first blocking plate (6045) is fixed to the bottom of the lifting plate (6041), and a second blocking plate (6046) is fixed to the side of the bottom of the lifting plate (6041) close to the backwashing pipe (605); The top end of the lifting rod (6042) movably extends to the outside of the flushing switch (604) and the screen filter cover (302), and a trigger bar (6043) is fixed on the inner wall of the biological micro-electrolysis reaction pool (1), and the position of the trigger bar (6043) corresponds to the lifting rod (6042).

2. The biological micro-electrolysis reaction system for treating acidified wastewater according to claim 1, characterized in that: The anode filler comprises an anode support frame (4), on which a plurality of vertically arranged stainless steel wire ropes (401) are fixed, and on which a plurality of carbon fiber fillers (402) are evenly distributed from top to bottom.

3. The biological micro-electrolysis reaction system for treating acidified wastewater according to claim 1, characterized in that: Two vertically arranged first guide rods (6011) are fixed to the top of the lifting bracket (601), a horizontal bar (6014) is fixed between the tops of the two first guide rods (6011), a guide sleeve (6012) is fixed to the outside of the first guide rod (6011), a floating block (6013) is fixed to the guide sleeve (6012), a first spring (6015) is provided at the top of the guide sleeve (6012), a top block (6017) is provided at the top and bottom of the floating block (6013), an upper pressure switch (6016) is provided below the horizontal bar (6014), and a lower pressure switch (6018) is provided at the top of the lifting bracket (601), and the upper pressure switch (6016) and the lower pressure switch (6018) are used to control the push rod motor (204).

4. The biological micro-electrolysis reaction system for treating acidified wastewater according to claim 3, characterized in that: The backwash pipe (605) is connected to a distribution transverse pipe (606), the distribution transverse pipe (606) is in communication with the plastic pipe (301), and the plastic pipe (301) is provided with a plurality of backwash water outlet holes (3011).

5. The biological micro-electrolysis reaction system for treating acidified wastewater according to claim 1, characterized in that: One end of the water inlet pipe (101) extending into the interior of the biological micro-electrolysis reaction pool (1) is connected to an annular water distribution pipe (1011), and a plurality of water distribution holes are provided on the annular water distribution pipe (1011).

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