Coffee wastewater treatment device

Abstract

This invention relates to the field of water treatment technology, and provides a coffee wastewater treatment device, including a shell, a reactor, a lighting component, and a stirring mechanism. The shell has an inner cavity and an opaque wall. The reactor is located in the inner cavity of the shell and includes a cover and a cylinder joined together. The cylinder includes a translucent wall, and a space exists between the reactor and the inner wall of the shell. The lighting component is disposed within the space and includes a lighting section facing the cylinder. The stirring mechanism is rotatably mounted on the cover and includes a stirring section extending into the bottom of the inner cavity of the cylinder. The reactor provides a suitable environment for anaerobic microorganisms to react with the coffee wastewater. The shell and the lighting section can respectively block external light and provide illumination to the reactor, effectively controlling the light power to regulate the activity of anaerobic microorganisms. Simultaneously, the stirring of the coffee wastewater by the stirring section ensures the efficiency of the reaction between the anaerobic microorganisms and the wastewater.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and specifically to a coffee wastewater treatment device. Background Technology

[0002] The primary processing of coffee into dried coffee beans from fresh coffee cherries mainly involves three methods: wet, semi-wet, and dry processing. Currently, most coffee bean producers use semi-wet and controlled-water wet processes, generating large amounts of wastewater and waste residue during processing. Coffee primary processing wastewater is characterized by high organic matter concentration, low pH, high suspended solids, high color, strong seasonality, and large fluctuations in water quality and quantity. If discharged indiscriminately without effective treatment, it will impact the ecological environment and human health. However, conventional wastewater treatment processes struggle to achieve compliant discharge of coffee wastewater, especially anaerobic devices such as upflow anaerobic sludge blanket reactors and internal circulation anaerobic reactors, which are unable to cope with the seasonality and large fluctuations in water quality and quantity. Therefore, treating coffee processing wastewater is difficult and challenging, and there is an urgent need for a method and device that can effectively purify coffee wastewater. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the shortcomings of existing wastewater treatment processes that cannot treat coffee wastewater with strong seasonality and large fluctuations in water quality and quantity, thereby providing a coffee wastewater treatment device.

[0004] To address the above problems, the present invention provides a coffee wastewater treatment device, comprising:

[0005] A shell having an inner cavity and an opaque wall; a reactor located in the inner cavity of the shell and including a cover and a cylinder joined together, the cylinder including a light-transmitting wall, and a space between the reactor and the inner wall of the shell; a lighting assembly disposed in the space, including a lighting section disposed toward the cylinder; and a stirring mechanism rotatably disposed on the cover, including a stirring section extending toward the bottom of the inner cavity of the cylinder.

[0006] Optionally, two or more of the lighting components are spaced apart within the space.

[0007] Optionally, the lighting assembly includes a bracket disposed on the inner wall of the housing, and the lighting section is disposed at one end of the bracket facing the cylinder.

[0008] Optionally, the bracket extends from top to bottom from the inner wall of the housing, and a plurality of the light-illuminating parts are spaced apart on the bracket.

[0009] Optionally, the illumination section is one or more of xenon lamps, LED lamps, incandescent lamps, and sodium lamps.

[0010] Optionally, the stirring mechanism includes a rotating rod, a drive motor is provided on the top of the cover, one end of the rotating rod is connected to the drive motor, and the other end extends to the bottom of the cylinder and is fixedly connected to the stirring part.

[0011] Optionally, the stirring part is a stirring paddle.

[0012] Optionally, the top of the cover is provided with a vent and a gas exchange device connected to the vent.

[0013] Optionally, the gas exchange device includes a gas pipe connected to the vent, and a three-way valve disposed at the end of the gas pipe.

[0014] Optionally, a gas pressure detection device is provided on the gas pipe.

[0015] The present invention has the following advantages:

[0016] 1. The coffee wastewater treatment device provided by the present invention includes a shell, a reactor, a light-emitting component, and a stirring mechanism. The shell has an inner cavity and an opaque wall. The reactor is located in the inner cavity of the shell and includes a cover and a cylinder joined together. The cylinder includes a light-transmitting wall and has a space between the reactor and the inner wall of the shell. The light-emitting component is disposed in the space and includes a light-emitting part facing the cylinder. The stirring mechanism is rotatably disposed on the cover and includes a stirring part extending into the bottom of the inner cavity of the cylinder.

[0017] In operation, a photocatalyst can be added to the cylinder to provide attachment support for anaerobic microorganisms, forming a biohybrid system. The anaerobic microorganisms are then added to the reactor. Coffee wastewater is introduced into the cylinder. When the wastewater level reaches a certain height, the illumination unit is activated. The light emitted from the illumination unit shines through the outer wall of the cylinder into the inner cavity, controlling the growth and metabolism of the anaerobic microorganisms through light, thereby controlling their activity. The opaque walls of the shell prevent light from escaping to the outside, reducing light power loss and preventing external light from entering the reactor and disrupting the predetermined illumination power. The stirring unit is rotated to ensure thorough mixing of the coffee wastewater, photocatalyst, and anaerobic microorganisms, guaranteeing a complete reaction between the anaerobic microorganisms and the coffee wastewater.

[0018] The coffee wastewater treatment device provided by this invention can provide a living environment for anaerobic microorganisms in the reactor, facilitating the reaction between anaerobic microorganisms and coffee wastewater. The shell and the illumination unit can respectively block external light and provide illumination to the reactor, effectively controlling the light power to regulate the activity of anaerobic microorganisms. Simultaneously, the stirring unit's agitation of the coffee wastewater ensures the efficiency of the reaction between anaerobic microorganisms and the wastewater.

[0019] 2. The coffee wastewater treatment device provided by the present invention comprises two or more light-emitting components spaced apart within an interval. The light-emitting sections of the two or more light-emitting components can provide illumination to the reactor at different angles, thereby improving light efficiency and enhancing the activity of anaerobic microorganisms.

[0020] 3. The coffee wastewater treatment device provided by the present invention includes a lighting component comprising a support, which is disposed on the inner wall of the housing, and the lighting unit is disposed at one end of the support facing the cylinder. The support being disposed on the inner wall of the housing, and the lighting unit being disposed on the support, facilitates control of the illumination direction of the lighting unit.

[0021] 4. The coffee wastewater treatment device provided by the present invention has a support extending from top to bottom from the inner wall of the shell, with multiple light-emitting units spaced apart on the support. These multiple light-emitting units can be arranged on the support in a top-to-bottom direction, thereby providing uniform irradiation to the side walls of the cylinder from top to bottom, improving light efficiency, and enhancing the activity of anaerobic microorganisms.

[0022] 5. The coffee wastewater treatment device provided by the present invention comprises one or more of the following: xenon lamps, LED lamps, incandescent lamps, and sodium lamps. All of these types of lamps can provide a lighting environment for anaerobic microorganisms.

[0023] 6. The coffee wastewater treatment device provided by the present invention includes a stirring mechanism comprising a rotating rod. A drive motor is installed on the top of the cover. One end of the rotating rod is connected to the drive motor, and the other end extends to the bottom of the cylinder and is fixedly connected to the stirring part. When the drive motor is working, it can drive the stirring part to rotate through the rotating rod. During the rotation of the stirring part, the coffee wastewater will flow, thereby facilitating the thorough mixing of the photocatalyst and anaerobic microorganisms with the wastewater.

[0024] 7. The coffee wastewater treatment device provided by the present invention has a vent on the top of the cover and a gas exchange device connected to the vent. Since anaerobic microorganisms require a certain gaseous environment to survive, the gas exchange device can introduce gas into the reactor to control the gas composition in the reactor and improve the activity of anaerobic microorganisms.

[0025] 8. The coffee wastewater treatment device provided by the present invention includes a gas exchange device comprising a gas pipe connected to a vent, and a three-way valve disposed at the end of the gas pipe. One end of the three-way valve can be connected to an exhaust pipe, and the other end can be connected to an inlet pipe. When the gas pressure in the reactor is too high, gas can be exhausted through the exhaust pipe; when the gas pressure in the reactor is insufficient, gas can be added through the inlet pipe.

[0026] 9. The coffee wastewater treatment device provided by the present invention includes a gas pressure detection device installed on the gas pipe. The gas pressure detection device allows for easy and intuitive observation of the gas pressure in the reactor, enabling flexible adjustments. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the coffee wastewater treatment device in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the top of the reactor in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the illumination component in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the reaction rates corresponding to different optical powers in an embodiment of the present invention;

[0032] Figure 5 This is a three-dimensional structural diagram of the reactor in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the control unit in an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Shell; 11. Spacer; 2. Reactor; 21. Cover; 211. Drive hole; 212. Vent; 22. Cylinder; 3. Illumination assembly; 31. Illumination section; 32. Support; 4. Stirring mechanism; 41. Stirring section; 42. Rotating rod; 5. Drive motor; 6. Gas exchange device; 7. Gas pressure detection element; 8. Control unit; 81. Stirring rate adjustment button; 82. Optical parameter adjustment button. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Before introducing the coffee wastewater treatment device provided by this invention, its working principle will first be explained. Coffee wastewater is characterized by high organic matter concentration, low pH, high suspended solids, high color, strong seasonality, and large fluctuations in water quality and quantity, making it difficult to treat using conventional wastewater treatment processes. The coffee wastewater treatment device provided by this invention overcomes the problem of difficult coffee wastewater treatment by utilizing photo-driven biological metabolism. Photo-driven biological metabolism is a method that can convert light energy into biochemical energy and has the effect of selectively enhancing bio-photoresponsive metabolism, featuring high efficiency, economy, environmental protection, precision, and flexibility.

[0041] Biohybrid systems are systems that combine organisms and photosensitive materials to enhance processes such as the biodegradation of organic matter. Based on the interaction between free radical-mediated chemical catalysis and photosynthesis, biohybrid systems can accelerate the conversion of light energy into chemical energy and even selectively regulate it. In biology, optogenetics is a method of controlling cellular behavior through optical and genetic techniques. Optical signals can be used to regulate microbial transcription, enzyme synthesis, and conformational changes, thereby controlling the growth and metabolism of the microbial community. By controlling light conditions, microbial activity can be effectively regulated to adapt to different water qualities and treatment loads. Natural and artificial cofactors and their regeneration play a crucial role in connecting photocatalysts and enzymes, and this process is influenced by various optical parameters, such as light intensity and light source.

[0042] To utilize the above principles to react microorganisms with coffee wastewater and achieve the goal of treating coffee wastewater, refer to... Figure 1 This invention provides a coffee wastewater treatment device, including a shell 1, a reactor 2, a lighting component 3, and a stirring mechanism 4. The shell 1 has an inner cavity and an opaque wall. The reactor 2 is located within the inner cavity of the shell 1 and includes a cover 21 and a cylinder 22 joined together. The cylinder 22 includes a translucent wall, and a space exists between the reactor 2 and the inner wall of the shell 1. The lighting component 3 is disposed within the space 11 and includes a lighting section 31 facing the cylinder 22. The stirring mechanism 4 is rotatably mounted on the cover 21 and includes a stirring section 41 extending towards the bottom of the inner cavity of the cylinder 22.

[0043] In detail, the housing 1 can be made of an opaque material, such as stainless steel. The housing 1 includes a cylindrical body and a top cover. During assembly, the top cover can be fastened to the top of the cylindrical body. Multiple through holes can be opened on the cylindrical body and the top cover to facilitate the entry of external wires and / or gas-liquid pipelines. The dimensions of the cylindrical body and the top cover can be manufactured according to actual needs.

[0044] When the cover 21 and the cylinder 22 of reactor 2 are fastened together, the inner cavity of reactor 2 is a sealed structure, which facilitates the isolation of the inner cavity of reactor 2 from the external environment, ensuring that the inner cavity of reactor 2 provides a controllable living environment for anaerobic microorganisms, especially for the effective control of gas composition and pressure in the reactor. A photocatalyst can be added to the cylinder 22 through impregnation, coating, deposition, immobilization, or nanoparticle dispersion. The photocatalyst can be carbon nitride, etc., which provides an environment supporting the attachment of anaerobic microorganisms, thereby forming a biohybrid system. To ensure that the external light source can effectively illuminate the inner cavity of reactor 2, the cylinder 22 can be made of a transparent material, such as glass, to facilitate the illumination of the inner cavity by the external light source, providing a light environment for the cylinder 22. The cover 21 can be made of stainless steel to facilitate drilling holes and / or setting other structures in the cover 21. Of course, a sealing structure can also be provided at the contact position between the cover 21 and the cylinder 22. For example, the cylinder 22 has an opening, and the bottom of the cover 21 can be fastened to the opening. A sealing ring is provided at the bottom of the cover 21 at the position corresponding to the opening of the cylinder 22.

[0045] The size of reactor 2 is smaller than that of shell 1, thus forming a space 11 in a certain area near the inner wall of shell 1. Illumination components 3 can be installed in this space 11, and the distance between the inner wall of shell 1 and the outer wall of cylinder 22 within the space 11 is sufficient for light from illumination component 31 to scatter onto cylinder 22, providing a more adequate lighting environment. It should be noted that the size of reactor 2 can also be adjusted according to actual needs.

[0046] When using the coffee wastewater treatment device provided by this invention, the top cover of the shell 1 can be opened first, followed by the opening of the cover 21 of the reactor 2. Then, a photocatalyst can be added to the cylinder 22 to provide attachment support for anaerobic microorganisms, thus coupling them to form a biohybrid system. The anaerobic microorganisms are then added to the cylinder 22. It should be noted that, generally, depending on the detection conditions of the coffee wastewater to be treated, the anaerobic microorganisms can be cultured externally under light for a certain period to ensure that the anaerobic microorganisms initially meet the conditions for reaction with the coffee wastewater.

[0047] After the anaerobic microbial reaction environment is established in reactor 2, the treatment of coffee wastewater can begin. First, the coffee wastewater is introduced into the cylinder 22. When the wastewater level reaches a certain height, the illumination unit 31 is turned on. The light emitted by the illumination unit 31 shines through the outer wall of the cylinder 22, illuminating the inner cavity of the cylinder 22. This light control regulates the growth and metabolism of the anaerobic microorganisms, thereby controlling their activity. The anaerobic microorganisms can react with the organic matter in the coffee wastewater. Furthermore, the opaque wall of the shell 1 prevents light from escaping to the outside, reducing light power loss and preventing external light from entering the reactor 2 and disrupting the predetermined illumination power. The stirring unit 41 is rotated to ensure thorough mixing of the coffee wastewater, photocatalyst, and anaerobic microorganisms, guaranteeing a full reaction between the anaerobic microorganisms and the coffee wastewater, further increasing the reaction rate.

[0048] It should be noted that the anaerobic microorganisms have been cultured in the external environment for a certain period of time. In reactor 2, the anaerobic microorganisms can continue to metabolize according to their living environment to iterate and develop a population of anaerobic microorganisms that is more suitable for treating coffee wastewater. This can further improve the reaction efficiency between anaerobic microorganisms and coffee wastewater, and improve the efficiency of treating organic matter in coffee wastewater.

[0049] The coffee wastewater treatment device provided by this invention can provide a living environment for anaerobic microorganisms in reactor 2, facilitating the reaction between anaerobic microorganisms and coffee wastewater. The shell 1 and the illumination unit 31 can respectively block external light and provide illumination to reactor 2, effectively controlling the light power to regulate the activity of anaerobic microorganisms. Simultaneously, the stirring unit 41's stirring of the coffee wastewater can improve the efficiency of the reaction between anaerobic microorganisms and wastewater.

[0050] refer to Figure 1 and Figure 2In one embodiment of the present invention, two or more illumination components are spaced apart within the space 11. For example, two illumination components 3 can be arranged opposite each other on the inner wall of the housing 1, with the illumination portions of the two illumination components 3 illuminating the reactor 2 from two opposite angles; alternatively, three, four, or more illumination components 3 can be arranged at intervals on the inner wall of the housing 1, with the distance between each pair of adjacent illumination components 3 being the same, and the illumination portion 31 of each illumination component 3 facing the reactor 2, thereby ensuring that the reactor 2 receives uniform illumination. Therefore, the illumination portions 31 of two or more illumination components 3 can provide illumination to the reactor 2 at different angles, thereby improving light efficiency and enhancing the activity of anaerobic microorganisms.

[0051] refer to Figure 1 and Figure 3 In one embodiment of the present invention, the illumination component 3 includes a support 32 disposed on the inner wall of the housing 1, and an illumination part 31 disposed on the end of the support 32 facing the cylindrical body. Specifically, the support 32 can be a column, the cross-section of which can be circular, rectangular, or rhomboid, etc., and the column has a hollow structure, which facilitates the arrangement of wires within the column. An installation port can be provided on one side of the column, allowing the illumination part 31 to be installed within the installation port. When the column is installed on the housing 1, the side of the column with the installation port can face the reactor 2. The support 32 being disposed on the inner wall of the housing 1, and the illumination part 31 being disposed on the support 32, facilitates control of the illumination direction of the illumination part 31.

[0052] refer to Figure 1 and Figure 3 In one embodiment of the present invention, the support 32 extends from top to bottom from the inner wall of the housing 1, and a plurality of light-emitting portions 31 are spaced apart on the support 32. Specifically, the light-emitting portions 31 can be arranged on the support 32 at predetermined intervals, that is, the light-emitting portions 31 are installed at mounting openings at predetermined intervals. The wires inside the cylinder can be connected to the light-emitting portions 31 and supply power to them. The plurality of light-emitting portions 31 can be arranged on the support 32 in a top-to-bottom direction, thereby providing uniform irradiation to the sidewalls of the cylinder 22 from top to bottom, improving light efficiency, and enhancing the activity of anaerobic microorganisms.

[0053] refer to Figure 1 and Figure 3 In one embodiment of the present invention, the illumination section 31 is one or more of xenon lamps, LED lamps, incandescent lamps, and sodium lamps. Specifically, since each type of lamp has a different light power range, one or more lamps can be selected as the illumination section 31 according to the needs of the current anaerobic microbial lighting environment, so as to facilitate the promotion of anaerobic microbial activity by adjusting the light power of the lamp.

[0054] Taking high-intensity xenon lamps, low-intensity xenon lamps, and white LED lamps as examples, the luminous power range of high-intensity xenon lamps is 80–120 mW / cm². 2 The luminous power range of low-intensity xenon lamps is 1–20 mW / cm². 2 The luminous power range of white LED lights is 2–6 mW / cm². 2 .

[0055] refer to Figure 4 Using coffee wastewater from high-altitude coffee-growing regions such as Pu'er in Yunnan as the experimental subject, the reaction rate of the coffee wastewater was slow under high-intensity xenon lamp irradiation, but faster under low-intensity xenon lamp or white LED lamp irradiation. This indicates that the coffee wastewater in this region is suitable for degradation by anaerobic microorganisms at lower light power, so low-intensity xenon lamps or white LEDs can be used as the illumination area 31. Of course, in other regions, the anaerobic microorganism reaction rate may be faster under higher light power, in which case high-intensity xenon lamps can be used as the illumination area 31.

[0056] As can be seen from the above, the illumination unit 31 can be flexibly adjusted by using lamps with different light power ranges. This greatly increases the coffee wastewater treatment capacity of the present invention, enabling it to adapt to coffee wastewater with different compositions. Furthermore, the illumination unit 31 has high controllability, such as within the range of 0–500 mW / cm². 2 The light power can be adjusted within a certain range, which can be achieved simply by replacing lamps with lamps of different light power, making it inexpensive and easy to produce and develop. Moreover, there is untapped wind and solar energy in high-altitude areas, and wind and solar power generation can power the coffee wastewater treatment plant, saving energy and operating costs.

[0057] In another embodiment of the invention, the plurality of illumination portions 31 can also be directly disposed on the inner wall of the housing 1, with multiple sets of illumination portions 31 arranged in a circular pattern on the inner wall of the housing 1 from bottom to top. Alternatively, the support 32 can be annular, with the outer wall of the annular shape fitting against the inner wall of the housing 1, and multiple illumination portions 31 spaced apart on the inner wall of the annular shape, with multiple annular supports arranged on the inner wall of the housing 1 from bottom to top. This arrangement can also achieve the purpose of uniformly irradiating the cylinder 22 of the reactor 2.

[0058] refer to Figure 1 and Figure 3 In one embodiment of the present invention, the stirring mechanism 4 includes a rotating rod 42, and a drive motor 5 is provided on the top of the cover 21. One end of the rotating rod 42 is connected to the drive motor 5 for transmission, and the other end extends to the bottom of the cylinder 22 and is fixedly connected to the stirring part 41.

[0059] Specifically, the drive motor 5 can be a stepper motor, and the model and specifications of the stepper motor can be selected according to the actual situation. A drive hole 211 is provided on the top of the cover 21, through which the rotating rod 42 extends to be connected to the drive motor 5 on the top of the cover 21. When the drive motor 5 is working, it can drive the stirring part 41 to rotate via the rotating rod 42. During the rotation of the stirring part 41, the coffee wastewater will flow, thereby facilitating the thorough mixing of the photocatalyst and anaerobic microorganisms with the wastewater.

[0060] refer to Figure 1 In one embodiment of the present invention, the stirring part 41 is a stirring paddle. The stirring paddle includes two stirring blades, which are set at different angles, thereby driving the flow of coffee wastewater. Of course, multiple stirring blades can also be set at different height positions of the rotating rod 42, which can also play the role of driving the flow of coffee wastewater. In addition, besides stirring blades, the stirring part 41 can also be a spiral stirring paddle or other structures commonly used in the art for driving water movement, which will not be listed here.

[0061] refer to Figure 1 and Figure 5 In one embodiment of the present invention, a vent 212 is provided on the top of the cover 21, and a gas exchange device 6 is connected to the vent 212. Since anaerobic microorganisms require a certain gaseous environment to survive, the gas exchange device 6 can introduce gas into the reactor to control the gas composition in the reactor 2 and improve the activity of anaerobic microorganisms.

[0062] refer to Figure 1 and Figure 5 In one embodiment of the invention, the gas exchange device 6 includes a gas pipe connected to the vent 212 and a three-way valve disposed at the end of the gas pipe. One end of the three-way valve can be connected to an exhaust pipe, and the other end can be connected to an inlet pipe. Furthermore, a piston can be provided on the three-way valve to seal the gas pipe. When the gas pressure in the reactor is too high, gas can be vented through the exhaust pipe; when the gas pressure in the reactor is insufficient, gas can be added through the inlet pipe, for example, a gaseous reaction substrate suitable for enhancing the activity of anaerobic microorganisms can be added through the inlet pipe.

[0063] In one embodiment of the present invention, a pressure detection element 7 is provided on the gas pipe. The pressure detection element 7 allows for easy and intuitive observation of the gas pressure in the reactor, enabling flexible adjustments. For example, the pressure detection element 7 can be a gas pressure gauge, which contacts the gas in the gas pipe through a diaphragm and displays the pressure data on the gauge dial. Of course, other pressure detection devices commonly used in the field of pressure monitoring can also be used, which will not be listed here.

[0064] refer to Figure 6In one embodiment of the present invention, the coffee wastewater treatment device includes a control unit 8, which can be connected to the electrical components in the coffee wastewater treatment device via wired or wireless connection. For example, the control unit 8 can be connected to the drive motor 5 and the illumination unit 31 via wired connection. The control unit can be a housing, and electrical components such as circuit boards are installed inside the control unit. The control unit 8 is equipped with a stirring rate adjustment button 81 and an optical parameter adjustment button 82. The stirring rate adjustment button 81 can adjust the rotation speed of the stirring unit 41; the optical parameter adjustment button 82 can adjust the light power range of the illumination unit 31, thereby making the reaction environment of anaerobic microorganisms more suitable for reasonable control and improving the activity of anaerobic microorganisms. Of course, the button can also be replaced with a knob or other structure for adjusting the level, which will not be listed here.

[0065] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A coffee wastewater treatment device, characterized in that, include: The shell (1) has an inner cavity and an opaque wall surface, which is used to prevent light from escaping to the outside, reduce light power loss, and prevent external light from irradiating into the reactor (2) to avoid damage to the predetermined light power. The reactor (2) is located in the inner cavity of the shell (1) and includes a cover (21) and a cylinder (22) joined together. The cylinder (22) includes a light-transmitting wall and has a space (11) between the reactor (2) and the inner wall of the shell (1). The inner cavity of the reactor (2) is adapted to provide a controllable living environment for anaerobic microorganisms. The top of the cover (21) is provided with a vent (212) and a gas exchange device (6) connected to the vent (212). The gas exchange device (6) includes a gas pipe connected to the vent (212) and a three-way valve provided at the end of the gas pipe. One end of the three-way valve is connected to an exhaust pipe, and the other end is connected to an inlet pipe. When the gas pressure in the reactor (2) is insufficient, the inlet pipe is adapted to add a gaseous reaction substrate that enhances the activity of anaerobic microorganisms. When the gas pressure in the reactor (2) is too high, the exhaust pipe is adapted to exhaust gas. Illumination components (3), two or more of the illumination components (3) are disposed in the space (11), including illumination parts (31) disposed in the direction of the cylinder (22), the illumination parts (31) are used to provide a light environment for anaerobic microorganisms in the inner cavity of the reactor (2), the illumination parts (31) are one or more of xenon lamps, LED lamps, incandescent lamps and sodium lamps with different light power ranges; The control unit (8) is connected to the electrical components of the coffee wastewater treatment device via wired or wireless connection. The control unit (8) is equipped with a stirring rate adjustment button (81) and an optical parameter adjustment button (82). The optical parameter adjustment button (82) is used to adjust the light power range of the illumination part (31) to control the reaction environment of anaerobic microorganisms and improve the activity of anaerobic microorganisms. The stirring mechanism (4) is rotatably mounted on the cover (21) and includes a stirring part (41) extending into the bottom of the inner cavity of the cylinder (22).

2. The coffee wastewater treatment device according to claim 1, characterized in that, The lighting component (3) includes a bracket (32) which is disposed on the inner wall of the housing (1), and the lighting part (31) is disposed at one end of the bracket (32) facing the cylinder (22).

3. The coffee wastewater treatment device according to claim 2, characterized in that, The bracket (32) extends from top to bottom from the inner wall of the housing (1), and a plurality of the illumination parts (31) are spaced apart on the bracket (32).

4. The coffee wastewater treatment device according to claim 1, characterized in that, The stirring mechanism (4) includes a rotating rod (42), and a drive motor (5) is provided on the top of the cover (21). One end of the rotating rod (42) is connected to the drive motor (5) for transmission, and the other end extends to the bottom of the cylinder (22) and is fixedly connected to the stirring part (41).

5. The coffee wastewater treatment device according to claim 4, characterized in that, The stirring part (41) is a stirring paddle.

6. The coffee wastewater treatment device according to claim 1, characterized in that, The gas pipe is equipped with a gas pressure detection device (7).

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