Catalytic treatment device and process for recycling coffee fruit fermentation degumming wastewater

Abstract

The application relates to the technical field of coffee processing, in particular to a catalytic treatment device and process for recycling coffee fresh fruit fermentation degumming sewage, which comprises a pretreatment assembly, a catalytic treatment assembly and a sedimentation tank arranged in sequence along the sewage flow direction. The catalytic treatment device and process for recycling coffee fresh fruit fermentation degumming sewage can intercept large-particle impurities in the sewage through the rotatable arc-shaped filter plate. When the reciprocating wire rod rotates to the upper area of the filter groove along with the rotating roller, the third gear and the arc-shaped gear rack are automatically self-rotated through the meshing effect, and then the scraper is axially slid along the surface of the arc-shaped filter plate, so that the impurities adhered to the arc-shaped filter plate can be automatically scraped off during the filtering process, and the impurities can be uniformly collected.

Description

Technical Field

[0001] This invention relates to the field of coffee processing technology, and more specifically, to a catalytic treatment device and process for recycling wastewater from the fermentation and degumming of fresh coffee cherries. Background Technology

[0002] During the initial processing of fresh coffee cherries, the peeling and fermentation / degumming steps generate a large amount of high-concentration organic wastewater. The fully wet processing method produces 5-10 tons of wastewater per ton of fresh coffee cherries processed. This wastewater is acidic and highly concentrated organic, containing large amounts of pectin, sugars, organic acids, and other pollutants.

[0003] Utility model patent document CN216445146U discloses a coffee fruit processing wastewater equalization tank, including a tank body, a screening trough, a heating plate, and an air-guiding and stirring mechanism. The tank body is a rectangular cavity structure with an open top, and the interior of the tank body is divided into two chambers by a partition. The chambers of the tank body are equipped with a heating plate and a deodorization unit. The air-guiding and stirring mechanism is installed inside the tank body, and includes a fixed plate, a disturbance rod, a first drive motor, a first air-guiding pipe, and an air-guiding pump. The fixed plate is fixedly installed on the upper part of the tank body, and the disturbance rod is installed on the upper part of the fixed plate. The disturbance rod is connected to the first drive motor through a connector. Several first air-guiding pipes are installed at the bottom of the tank body, and the first air-guiding pipes are connected to an air-guiding box through second air-guiding pipes. A screening trough and a material guiding unit are installed at one end of the tank body. This technical solution is used to solve the problems of existing wastewater equalization tanks being unable to remove impurities and having limited functionality.

[0004] It is evident that existing coffee processing wastewater treatment equipment, after filtering large particulate impurities, allows these impurities to easily adhere to the surface of the filter structure, requiring manual shutdown for cleaning, which affects wastewater treatment efficiency. At the same time, the existing catalytic treatment process is not effective in degrading organic pollutants such as pectin in wastewater, making it difficult to directly reuse the treated wastewater in the production process, thus failing to meet the production demand for wastewater recycling and reuse.

[0005] In view of this, we propose a catalytic treatment device and process for recycling wastewater from the fermentation and degumming of fresh coffee cherries. Summary of the Invention

[0006] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a catalytic treatment device and process for recycling wastewater from the fermentation and degumming of fresh coffee cherries.

[0007] In a first aspect, this application provides a catalytic treatment device for recycling wastewater from the fermentation and degumming of fresh coffee cherries, comprising a pretreatment component, a catalytic treatment component, and a sedimentation tank arranged sequentially along the wastewater flow direction. The pretreatment assembly includes a filter tank, a rotating roller rotatably connected to the filter tank, and several arc-shaped filter plates regularly fixed to the outer wall of the rotating roller; scrapers are slidably connected to the arc-shaped filter plates, and reciprocating screws are rotatably connected to the outer wall of the rotating roller at corresponding positions on the arc-shaped filter plates, with the scrapers on the corresponding sides being threadedly connected to the reciprocating screws. The catalytic treatment assembly includes a catalytic tank and a stirring roller rotatably connected inside the catalytic tank; an aeration disc is installed at the bottom of the catalytic tank.

[0008] This design takes into account that after the existing filter structure traps large particles of impurities, the impurities tend to adhere to the filter surface, requiring manual shutdown for cleaning, which affects the wastewater treatment efficiency. By setting up an arc-shaped filter plate that can rotate with the rotating roller, and a scraper that can slide on the arc-shaped filter plate, the impurities trapped on the arc-shaped filter plate can be automatically cleaned during the filtration operation.

[0009] At the same time, ozone is injected into the catalytic tank through the aeration disc, and the ozone is catalyzed by the composite catalyst to generate hydroxyl radicals, which can efficiently oxidize and degrade organic pollutants such as pectin, organic acids, and sugars in wastewater, improve the degradation effect, and enable the treated water quality to meet the requirements for reuse in the production process.

[0010] According to the technical solution provided in the embodiments of this application, an arc-shaped rack is welded and fixed to the top of one side wall of the filter tank. The center of the arc-shaped rack is located on the central axis of the rotating roller. A third gear is coaxially welded and fixed to one side end of the reciprocating screw. The third gear meshes with the arc-shaped rack.

[0011] This feature allows the reciprocating screw to automatically rotate when it reaches the area above the filter tank via the meshing of the third gear and the arc-shaped rack, thereby driving the scraper to slide axially along the surface of the arc-shaped filter plate and automatically completing the scraping and cleaning operation.

[0012] According to the technical solution provided in the embodiments of this application, multiple sets of fixing frames are welded and fixed on the outer wall of the rotating roller, the reciprocating screw is rotatably connected to the fixing frame, the fixing frame is provided with a sliding rod, and the scraper end is provided with a threaded hole and a sliding hole respectively adapted to the reciprocating screw and the sliding rod.

[0013] This setting guides and limits the sliding of the scraper, ensuring more stable scraper movement and preventing the scraper from rotating with the reciprocating screw, thus ensuring smooth scraping operations.

[0014] According to the technical solution provided in the embodiments of this application, a guide plate is welded and fixed to the top of both side walls of the filter tank, and a collection box is placed on the outer side of the filter tank at the outer end of the guide plate.

[0015] This feature allows for the diversion of impurities scraped off by the scraper, facilitating their collection into a collection box for subsequent centralized processing.

[0016] According to the technical solution provided in the embodiments of this application, a first gear is coaxially welded and fixed to the end of the rotating shaft of the rotating roller, and a second gear is rotatably connected to the outer wall of the filter tank, the second gear meshing with the first gear.

[0017] According to the technical solution provided in the embodiments of this application, a first motor is installed on one side of the filter tank, and the output shaft of the first motor is coaxially connected to the second gear.

[0018] These two settings can be achieved by the first motor working, which drives the second gear to rotate, and then drives the rotating roller to rotate stably through the meshing first gear, providing sufficient rotational power for the rotating roller.

[0019] According to the technical solution provided in the embodiments of this application, the top of the catalytic tank is provided with a liquid inlet and a feeding port, and the bottom of the side wall of the catalytic tank is provided with a drain pipe.

[0020] This feature facilitates the introduction of filtered wastewater, the addition of lime slurry for pH adjustment, and the addition of the composite catalyst required for the catalytic reaction. The drain pipe also facilitates the discharge of wastewater after catalytic treatment.

[0021] According to the technical solution provided in the embodiments of this application, a spiral blade is welded and fixed to the outer wall of the stirring roller, and a plurality of stirring rods are regularly welded and fixed to the outer wall of the stirring roller. A fourth gear is coaxially welded and fixed to the top of the stirring roller after it extends out of the catalytic tank. A fifth gear is rotatably connected to one side of the top of the catalytic tank, and the fifth gear meshes with the fourth gear.

[0022] In this setup, the spiral blades can cause the bottom wastewater in the tank to tumble upwards. Combined with the stirring action of the stirring rod, this ensures that the lime slurry, catalyst, and wastewater are thoroughly mixed, guaranteeing a complete reaction.

[0023] According to the technical solution provided in the embodiments of this application, a second motor is installed at the top of the catalytic tank, the output shaft of the second motor is coaxially connected to the fifth gear, and an air guide pipe is provided at the top of the aeration disc. The air guide pipe passes through the cavity of the stirring roller and is connected to an external ozone generator.

[0024] This design allows the stirring roller to rotate stably via a second motor, while the gas guide pipe extends from inside the stirring roller, thus not occupying extra space in the catalytic converter, resulting in a more rational layout.

[0025] On the other hand, this application also provides a catalytic treatment process for recycling wastewater from coffee cherry fermentation and degumming. Using the aforementioned catalytic treatment device for recycling wastewater from coffee cherry fermentation and degumming, the process includes the following steps: S1. First, the wastewater from the fermentation and degumming of fresh coffee fruit flows through the filter tank. The first motor is started, and through the meshing first and second gears, the rotating roller is driven to rotate, which in turn drives the arc-shaped filter plate to rotate. This causes large particles of impurities such as fruit peel and pulp in the wastewater to adhere to the arc-shaped filter plate and rotate with the rotating roller. S2. As the rotating roller rotates, the third gear moves to mesh with the arc-shaped rack, which causes the reciprocating screw to rotate as the rotating roller rotates. The scraper slides axially with the reciprocating screw, scraping off the impurities attached to the arc-shaped filter plate and pushing the impurities to one side until they detach from the arc-shaped filter plate and fall onto the guide plate, and finally into the collection box. S3. Next, the filtered wastewater enters the catalytic tank through the inlet. The second motor is started, and the meshing fourth and fifth gears drive the stirring roller to rotate. The spiral blades drive the bottom wastewater to flow to the top, and the stirring rod stirs the wastewater. S4. Add lime slurry into the catalytic tank through the feeding port, and stir it with the rotating stirring roller to adjust the pH value of the wastewater to neutral. S5. Then, start the external ozone generator and inject ozone into the aeration disc through the air pipe for aeration. Then, put a composite catalyst composed of manganese dioxide and cerium dioxide into the catalytic tank through the feeding port. Under the catalytic action, a large number of hydroxyl radicals are generated, which oxidize and degrade organic pollutants such as pectin, organic acids, and sugars in the wastewater. S6. Finally, the wastewater after catalytic treatment flows into the sedimentation tank through the drain pipe. The suspended solids and a small amount of flocs generated by the reaction in the wastewater settle to the bottom of the tank. The clarified liquid at the top of the sedimentation tank is introduced into the clear water tank and then pumped to the recycled water pipeline of the coffee fresh fruit fermentation and degumming process by the reuse pump, so as to realize the recycling of wastewater.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The catalytic treatment device and process for recycling wastewater from fresh coffee fruit fermentation and degumming uses a rotatable arc-shaped filter plate to trap large particulate impurities in the wastewater. When the reciprocating screw rotates with the rotating roller to the area above the filter tank, it automatically rotates through the meshing of the third gear and the arc-shaped rack, thereby driving the scraper to slide axially along the surface of the arc-shaped filter plate. This allows the impurities attached to the arc-shaped filter plate to be automatically scraped off during the filtration process and collected uniformly.

[0027] 2. The catalytic treatment device and process for recycling wastewater from coffee fresh fruit fermentation and degumming involves injecting ozone into the wastewater in the catalytic tank, which, in conjunction with a composite catalyst composed of manganese dioxide and cerium dioxide, generates a large number of highly oxidizing hydroxyl radicals. These radicals fully oxidize and degrade organic pollutants such as pectin, organic acids, and sugars in the wastewater, effectively reducing the COD content and ensuring that the treated water meets the reuse requirements of the coffee fresh fruit fermentation and degumming process. This achieves wastewater recycling and reuse, reducing water waste. Attached Figure Description

[0028] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of the invention; Figure 2 This is a schematic diagram of the pretreatment component structure in the invention; Figure 3 For invention Figure 2 Enlarged view of the structure of A in the middle; Figure 4 This is an exploded view of the pretreatment component structure in the invention; Figure 5 This is an exploded view of the catalytic treatment component structure in the invention; Figure 6 This is an exploded view of the catalytic treatment component structure in the invention; In the picture: 100. Pretreatment component; 110. Filter tank; 111. Guide tray; 112. Arc-shaped rack; 113. Collection box; 120. Rotating roller; 121. Fixing frame; 130. Arc-shaped filter plate; 140. First gear; 150. Second gear; 160. Scraper; 170. Reciprocating screw; 171. Third gear; 180. Slide bar; 190. First motor; 200. Catalytic treatment component; 210. Catalytic tank; 211. Liquid inlet; 212. Feeding port; 213. Drain pipe; 220. Stirring roller; 221. Spiral blade; 222. Stirring rod; 230. Fourth gear; 240. Fifth gear; 250. Aeration disc; 251. Air guide pipe; 260. Second motor; 300. Sedimentation tank. Detailed Implementation

[0029] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Please see Figure 1 As shown, a catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming includes a pretreatment component 100, a catalytic treatment component 200, and a sedimentation tank 300 arranged sequentially along the wastewater flow direction.

[0032] In this embodiment, please refer to Figures 2-4 As shown, the pretreatment assembly 100 includes a filter tank 110, a rotating roller 120 rotatably connected to the filter tank 110, and several arc-shaped filter plates 130 regularly fixed to the outer side wall of the rotating roller 120; scrapers 160 are slidably connected to the arc-shaped filter plates 130, and reciprocating screws 170 are rotatably connected to the outer side wall of the rotating roller 120 at corresponding positions on the arc-shaped filter plates 130, and the corresponding scrapers 160 are threadedly connected to the reciprocating screws 170.

[0033] Considering that existing filtration structures trap large particles of impurities, which easily adhere to the filter surface and require manual cleaning, thus affecting wastewater treatment efficiency, this technical solution uses an arc-shaped filter plate 130 that can rotate with the rotating roller 120 to continuously filter and intercept wastewater. In conjunction with a scraper 160 that can slide on the arc-shaped filter plate 130, the impurities trapped on the arc-shaped filter plate 130 can be automatically cleaned during the filtration process.

[0034] Furthermore, an arc-shaped rack 112 is welded and fixed to the top of one side wall of the filter tank 110. The center of the arc-shaped rack 112 is located on the central axis of the rotating roller 120. A third gear 171 is coaxially welded and fixed to one side end of the reciprocating screw 170. The third gear 171 meshes with the arc-shaped rack 112.

[0035] When the reciprocating screw 170 rotates with the rotating roller 120 to the area above the filter tank 110, the third gear 171 will mesh with the arc-shaped rack 112, thereby driving the reciprocating screw 170 to rotate automatically while revolving with the rotating roller 120. This causes the scraper 160, which is threadedly connected to the reciprocating screw 170, to slide axially along the surface of the arc-shaped filter plate 130, automatically scraping away large particles of impurities trapped by the arc-shaped filter plate 130.

[0036] Secondly, multiple sets of fixed frames 121 are welded and fixed on the outer wall of the rotating roller 120. The reciprocating screw 170 is rotatably connected to the fixed frame 121. The fixed frame 121 is provided with a slide rod 180. The end of the scraper 160 is provided with a threaded hole and a sliding hole that are adapted to the reciprocating screw 170 and the slide rod 180 respectively. The slide rod 180 passes through the sliding hole at the end of the scraper 160, which can limit and guide the sliding direction of the scraper 160, prevent the scraper 160 from rotating with the reciprocating screw 170, ensure that the scraper 160 slides stably along the axial direction, and make the scraping of impurities proceed smoothly.

[0037] Furthermore, a first gear 140 is coaxially welded to the end of the rotating shaft of the rotating roller 120, and a second gear 150 is rotatably connected to the outer wall of the filter tank 110. The second gear 150 meshes with the first gear 140. A first motor 190 is installed on one side of the filter tank 110, and the output shaft of the first motor 190 is coaxially connected to the second gear 150.

[0038] When the first motor 190 is working, it drives the second gear 150 to rotate. The second gear 150 drives the first gear 140 to rotate through meshing, which in turn drives the rotating roller 120 to rotate stably on the filter tank 110, providing power for the rotation of the arc-shaped filter plate 130 and automatic cleaning.

[0039] Secondly, guide plates 111 are welded and fixed to the top of both side walls of the filter tank 110, and a collection box 113 is placed on the outer side of the filter tank 110 at the outer end of the guide plate 111. When the scraper 160 scrapes the impurities intercepted on the arc-shaped filter plate 130 onto the guide plate 111, the impurities will automatically slide down the inclined surface of the guide plate 111 into the collection box 113, completing the unified collection of impurities. This facilitates the centralized processing of the collected impurities and prevents impurities from scattering randomly and affecting the working environment.

[0040] like Figures 5-6 As shown, the catalytic treatment assembly 200 includes a catalytic tank 210 and a stirring roller 220 rotatably connected inside the catalytic tank 210; an aeration disc 250 is installed at the bottom inside the catalytic tank 210.

[0041] Furthermore, a spiral blade 221 is welded and fixed to the outer wall of the stirring roller 220, and several stirring rods 222 are regularly welded and fixed to the outer wall of the stirring roller 220. A fourth gear 230 is coaxially welded and fixed to the top of the stirring roller 220 after extending out of the catalytic tank 210. A fifth gear 240 is rotatably connected to one side of the top of the catalytic tank 210, and the fifth gear 240 meshes with the fourth gear 230. A second motor 260 is installed at the top of the catalytic tank 210, and the output shaft of the second motor 260 is coaxially connected to the fifth gear 240. An air guide pipe 251 is provided at the top of the aeration disc 250, and the air guide pipe 251 passes through the hollow cavity of the stirring roller 220 and is connected to an external ozone generator.

[0042] The second motor 260 operates, driving the fifth gear 240 to rotate. The fifth gear 240, through meshing, drives the fourth gear 230 to rotate, which in turn drives the stirring roller 220 to rotate stably inside the catalytic tank 210. The spiral blades 221 can cause the sewage at the bottom of the catalytic tank 210 to turn upward. With the continuous stirring of the stirring rod 222, the added lime slurry, composite catalyst and sewage can be fully mixed, ensuring that the catalytic oxidation reaction is fully carried out. At the same time, the gas guide pipe 251 passes through the hollow cavity of the stirring roller 220, without occupying additional reaction space inside the catalytic tank 210. The overall device layout is more compact and reasonable.

[0043] Furthermore, the top of the catalytic tank 210 is provided with an inlet 211 and a feeding port 212, and the bottom of the side wall of the catalytic tank 210 is provided with a drain pipe 213; the inlet 211 facilitates the flow of filtered wastewater into the catalytic tank 210, the feeding port 212 facilitates the addition of lime slurry for pH adjustment and composite catalyst required for catalytic reaction, and the drain pipe 213 facilitates catalytic treatment.

[0044] The catalytic treatment process for recycling coffee fresh fruit fermentation and degumming wastewater of this application uses the aforementioned catalytic treatment device for recycling coffee fresh fruit fermentation and degumming wastewater, and includes the following steps: S1. First, the wastewater from the fermentation and degumming of fresh coffee fruit flows through the filter tank 110. The first motor 190 is started, and through the meshing first gear 140 and second gear 150, the rotating roller 120 is driven to rotate, which in turn drives the arc-shaped filter plate 130 to rotate, so that large particles of impurities such as fruit peel and pulp in the wastewater are attached to the arc-shaped filter plate 130 and rotate with the rotating roller 120. S2. As the rotating roller 120 rotates, the third gear 171 moves to mesh with the arc-shaped rack 112, which causes the reciprocating screw 170 to rotate as the rotating roller 120 rotates. The scraper 160 slides axially with the reciprocating screw 170, scraping off the impurities attached to the arc-shaped filter plate 130, pushing the impurities to one side until they detach from the arc-shaped filter plate 130 and fall onto the guide plate 111, and finally into the collection box 113. S3. Next, the filtered wastewater enters the catalytic tank 210 through the inlet 211. The second motor 260 is started, and the stirring roller 220 is driven to rotate through the meshing fourth gear 230 and fifth gear 240. The spiral blades 221 drive the bottom wastewater to flow to the top layer, and the stirring rod 222 stirs the wastewater. S4. Lime slurry is added into the catalytic tank 210 through the feeding port 212 and stirred by the rotating stirring roller 220 to adjust the pH value of the wastewater to neutral. S5. Then, start the external ozone generator and inject ozone into the aeration disc 250 through the air pipe 251 for aeration. Then, put a composite catalyst composed of manganese dioxide and cerium dioxide into the catalytic tank 210 through the feeding port 212. Under the catalytic action, a large number of hydroxyl radicals are generated, which oxidize and degrade organic pollutants such as pectin, organic acids, and sugars in the wastewater. S6. Finally, the wastewater after catalytic treatment flows into the sedimentation tank 300 through the drain pipe 213. The suspended solids and a small amount of flocs generated by the reaction in the wastewater settle to the bottom of the tank. The clarified liquid at the top of the sedimentation tank 300 is introduced into the clear water tank and then pumped to the recycled water pipeline of the coffee fresh fruit fermentation and degumming process by the reuse pump, so as to realize the recycling of wastewater.

[0045] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with, but not limited to, technical features disclosed in this application that have similar functions.

Claims

1. A catalytic treatment device for recycling wastewater from coffee cherry fermentation and degumming, characterized in that: It includes a pretreatment component (100), a catalytic treatment component (200), and a sedimentation tank (300) arranged sequentially along the direction of sewage flow. The pretreatment assembly (100) includes a filter tank (110), a rotating roller (120) rotatably connected to the filter tank (110), and several arc-shaped filter plates (130) regularly fixed to the outer side wall of the rotating roller (120); a scraper (160) is slidably connected to the arc-shaped filter plate (130), and a reciprocating screw (170) is rotatably connected to the outer side wall of the rotating roller (120) at the corresponding position of the arc-shaped filter plate (130), and the scraper (160) on the corresponding side is threadedly connected to the reciprocating screw (170); The catalytic treatment assembly (200) includes a catalytic tank (210) and a stirring roller (220) rotatably connected inside the catalytic tank (210); an aeration disc (250) is installed at the bottom inside the catalytic tank (210).

2. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 1, characterized in that: An arc-shaped rack (112) is welded and fixed to the top of one side wall of the filter tank (110). The center of the arc-shaped rack (112) is located on the central axis of the rotating roller (120). A third gear (171) is coaxially welded and fixed to one side end of the reciprocating screw (170). The third gear (171) meshes with the arc-shaped rack (112).

3. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 2, characterized in that: Multiple sets of fixing frames (121) are welded and fixed on the outer wall of the rotating roller (120). The reciprocating screw (170) is rotatably connected to the fixing frame (121). The fixing frame (121) is provided with a slide rod (180). The scraper (160) has a threaded hole and a sliding hole at its end that are adapted to the reciprocating screw (170) and the slide rod (180), respectively.

4. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 3, characterized in that: The top of both sides of the filter tank (110) are welded and fixed with a guide plate (111), and a collection box (113) is placed on the outside of the filter tank (110) at the outer end of the guide plate (111).

5. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 4, characterized in that: The first gear (140) is coaxially welded to the end of the rotating shaft of the rotating roller (120), and the second gear (150) is rotatably connected to the outer wall of the filter tank (110). The second gear (150) meshes with the first gear (140).

6. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 5, characterized in that: A first motor (190) is installed on one side of the filter tank (110), and the output shaft of the first motor (190) is coaxially connected to the second gear (150).

7. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 6, characterized in that: The catalyst tank (210) is provided with a liquid inlet (211) and a feeding port (212) at the top, and a drain pipe (213) is provided at the bottom of the side wall of the catalyst tank (210).

8. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 7, characterized in that: Spiral blades (221) are welded and fixed to the outer wall of the stirring roller (220). Several stirring rods (222) are regularly welded and fixed to the outer wall of the stirring roller (220). A fourth gear (230) is coaxially welded and fixed to the top of the stirring roller (220) after it extends out of the catalytic tank (210). A fifth gear (240) is rotatably connected to one side of the top of the catalytic tank (210). The fifth gear (240) meshes with the fourth gear (230).

9. The catalytic treatment device for recycling wastewater from coffee fresh fruit fermentation and degumming according to claim 8, characterized in that: The catalyst tank (210) is equipped with a second motor (260) at the top. The output shaft of the second motor (260) is coaxially connected to the fifth gear (240). The aeration disc (250) is provided with an air guide pipe (251) at the top. The air guide pipe (251) passes through the cavity of the stirring roller (220) and is connected to an external ozone generator.

10. A catalytic treatment process for recycling wastewater from coffee cherry fermentation and degumming, using the catalytic treatment device for recycling wastewater from coffee cherry fermentation and degumming as described in claim 9, characterized in that, Includes the following steps: S1. First, the wastewater from the fermentation and degumming of fresh coffee fruit flows through the filter tank (110). The first motor (190) is started, and through the meshing first gear (140) and second gear (150), the rotating roller (120) is driven to rotate, which in turn drives the arc-shaped filter plate (130) to rotate, so that large particles of impurities such as fruit peel and pulp in the wastewater adhere to the arc-shaped filter plate (130) and rotate with the rotating roller (120). S2. As the rotating roller (120) rotates, the third gear (171) moves to mesh with the arc-shaped rack (112), which causes the reciprocating screw (170) to rotate as the rotating roller (120) rotates. The scraper (160) slides axially with the reciprocating screw (170), scraping off the impurities attached to the arc-shaped filter plate (130), pushing the impurities to one side until they detach from the arc-shaped filter plate (130) and fall onto the guide plate (111), and finally into the collection box (113). S3. Next, the filtered wastewater enters the catalytic tank (210) through the inlet (211). The second motor (260) is started, and the stirring roller (220) is driven to rotate through the meshing fourth gear (230) and fifth gear (240). The spiral blades (221) drive the bottom wastewater to flow to the top layer, and the stirring rod (222) stirs the wastewater. S4. Lime slurry is added into the catalytic tank (210) through the feeding port (212), and stirred with the rotation of the stirring roller (220) to adjust the pH value of the wastewater to neutral. S5. Then, start the external ozone generator and inject ozone into the aeration disc (250) through the air pipe (251) for aeration. Then, put a composite catalyst composed of manganese dioxide and cerium dioxide into the catalytic tank (210) through the feeding port (212). Under the catalytic action, a large number of hydroxyl radicals are generated to oxidize and degrade organic pollutants such as pectin, organic acids, and sugars in the wastewater. S6. Finally, the wastewater after catalytic treatment flows into the sedimentation tank (300) through the drain pipe (213). The suspended solids and a small amount of flocs generated by the reaction in the wastewater settle to the bottom of the tank. The clarified liquid at the top of the sedimentation tank (300) is introduced into the clear water tank and then transported to the recycled water pipeline of the coffee fresh fruit fermentation and degumming process by the reuse pump, so as to realize the recycling of wastewater.

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