Anaerobic biofilm reaction device

Abstract

The embodiment of the utility model provides an anaerobic biofilm reaction device, and relates to the technical field of wastewater treatment. The anaerobic biofilm reaction device comprises a reactor body, wherein a feeding pipe, a gas outlet pipe and a sludge discharge pipe are arranged on the reactor body; the solid-liquid separation mechanism is arranged outside or inside the reactor body, the solid-liquid separation mechanism is provided with an input end, a liquid phase output end and a solid phase output end, and the solid phase output end is communicated with the inside of the reactor body; and the driving mechanism is used for conveying the mixed liquid in the reactor body into the solid-liquid separation mechanism along the input end, so that the solid-liquid separation mechanism performs solid-liquid separation on the mixed liquid. The anaerobic biofilm reaction device adopts the solid-liquid separation mechanism to perform active solid-liquid separation on the mixed liquid, so that the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to an anaerobic biofilm reactor. Background Technology

[0002] Untreated wastewater contains a large number of pollutants, especially industrial wastewater. If it is simply treated and discharged directly into natural environments such as rivers, lakes, and soil, it will cause black and smelly water bodies, soil pollution, and the death of aquatic organisms, disrupting the balance and stability of the ecosystem. If it seeps into the ground or enters drinking water sources, it will spread diseases, harm human health, and threaten the safety of residents' drinking water. Therefore, it is crucial to adopt efficient and stable treatment technologies to purify industrial wastewater. Anaerobic biofilm reactors are one important treatment method.

[0003] In related technologies, industrial wastewater treatment devices include a reactor body, which is equipped with an inlet pipe, an outlet pipe, an air outlet pipe, and a sludge discharge pipe. The industrial wastewater to be treated enters the reactor body through the inlet pipe and undergoes anaerobic degradation reaction in an anaerobic environment. The mixed liquid formed after the reaction naturally settles in the reactor body, and solid-liquid stratification is achieved by gravity. The solid phase products slowly settle to the bottom of the reactor body and are discharged as needed through the sludge discharge pipe, while the liquid phase products collect at the top of the reactor body and are finally discharged through the outlet pipe.

[0004] However, in actual industrial wastewater treatment, the natural sedimentation process relies on gravity separation, which takes a long time. Furthermore, industrial wastewater often contains a lot of suspended solids and high sludge concentration, which further restricts sedimentation efficiency and makes it difficult to meet the efficiency requirements of continuous, large-scale industrial wastewater treatment, thus becoming a bottleneck to improving overall treatment capacity. Utility Model Content

[0005] This application provides an anaerobic biofilm reactor to address the technical problem that in the actual treatment of industrial wastewater, the natural sedimentation process relies on gravity separation, which is time-consuming. Furthermore, industrial wastewater often contains a large amount of suspended solids and high sludge concentration, which further restricts sedimentation efficiency and makes it difficult to meet the efficiency requirements of continuous, large-scale industrial wastewater treatment.

[0006] This application provides an anaerobic biofilm reactor, comprising:

[0007] The reactor body is equipped with a feed pipe, an air outlet pipe, and a sludge discharge pipe.

[0008] A solid-liquid separation mechanism is disposed outside or inside the reactor body. The solid-liquid separation mechanism has an input end, a liquid phase output end, and a solid phase output end, and the solid phase output end is connected to the interior of the reactor body.

[0009] A drive mechanism is provided to transport the mixture in the reactor body along the input end to the solid-liquid separation mechanism, so that the solid-liquid separation mechanism can perform solid-liquid separation on the mixture.

[0010] In some embodiments, the solid-liquid separation mechanism includes a membrane module.

[0011] In some embodiments, the solid-liquid separation mechanism is disposed outside the reactor body;

[0012] A reflux mechanism is provided between the solid output end and the reactor body. The reflux mechanism is used to transport the solid product output from the solid output end to the interior of the reactor body.

[0013] In some embodiments, the recirculation mechanism includes:

[0014] A reflux pipeline, one end of which is connected to the solid phase output end, and the other end of which is connected to the reactor body.

[0015] In some embodiments, the drive mechanism includes:

[0016] A first delivery pipeline, one end of which is connected to the reactor body, and the other end of which is connected to the input end;

[0017] A first delivery pump is connected to a first delivery pipeline. The first delivery pump is used to deliver the mixture in the reactor body to the solid-liquid separation mechanism along the first delivery pipeline and the input end.

[0018] In some embodiments, the solid-liquid separation mechanism is disposed inside the reactor body, and the solid phase output end is disposed inside the reactor body to communicate with the interior of the reactor body.

[0019] In some embodiments, the drive mechanism includes a negative pressure delivery pump, which is connected to the liquid phase output terminal;

[0020] The negative pressure delivery pump is used to extract the liquid phase product from the liquid phase output end to create a negative pressure at the input end, thereby driving the mixture in the reactor body to enter the interior of the solid-liquid separation mechanism along the input end.

[0021] In some embodiments, a gas distribution mechanism is further included, which is disposed inside the reactor body and connected to the solid-liquid separation mechanism, and is used to supply gas to the solid-liquid separation mechanism.

[0022] In some embodiments, a gas delivery mechanism is further included, which is connected between the gas distribution mechanism and the gas outlet pipe, and is used to deliver a portion of the gas in the gas outlet pipe to the interior of the gas distribution mechanism.

[0023] In some embodiments, the gas delivery mechanism includes:

[0024] The second conveying pipeline has one end connected to the air outlet pipe and the other end connected to the air distribution mechanism.

[0025] The second delivery pump is connected to the second delivery pipeline and is used to deliver a portion of the gas in the outlet pipe to the interior of the gas distribution mechanism along the second delivery pipeline.

[0026] This application provides an anaerobic biofilm reactor that actively transports the mixed liquid in the reactor body to a solid-liquid separation mechanism for forced solid-liquid separation via a drive mechanism. Compared to existing technologies that rely on the natural sedimentation of solid products by gravity, this method shortens the time required for solid-liquid separation and prevents process blockage caused by excessively long natural sedimentation times. The synergistic effect of active transport and forced separation improves the separation efficiency of the mixed liquid and the retention rate of solid products. This allows the liquid products to be quickly discharged through the liquid output end of the solid-liquid separation mechanism, while the retained solid products are returned to the reactor body through the solid output end. This prevents some microorganisms from being discharged with the liquid products, thereby maintaining a stable microbial concentration in the reactor body to maintain the efficiency of the anaerobic degradation reaction and improving the wastewater treatment efficiency of the anaerobic biofilm reactor. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 Schematic diagram of the anaerobic biofilm reactor provided in this application Figure 1 ;

[0029] Figure 2 Schematic diagram of the anaerobic biofilm reactor provided in this application Figure 2 .

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Reactor body; 110. Feed pipe; 120. Gas outlet pipe; 130. Sludge discharge pipe;

[0032] 200. Solid-liquid separation mechanism; 210. Input end; 220. Liquid phase output end; 230. Solid phase output end;

[0033] 300. Drive mechanism; 310. First delivery pipeline; 320. First delivery pump;

[0034] 400. Return mechanism;

[0035] 500. Air distribution mechanism;

[0036] 600. Gas delivery mechanism; 610. Second delivery pipeline; 620. Second delivery pump.

[0037] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0039] In related technologies, wastewater treatment devices include a reactor body, which is equipped with a feed pipe, an outlet pipe, an air outlet pipe, and a sludge discharge pipe. The wastewater to be treated enters the reactor body through the feed pipe and undergoes anaerobic degradation reaction in an anaerobic environment. The mixed liquid formed after the reaction settles naturally in the reactor body, and solid-liquid stratification is achieved by gravity. The solid phase products slowly settle to the bottom of the reactor body and are discharged as needed through the sludge discharge pipe, while the liquid phase products collect at the top of the reactor body and are finally discharged through the outlet pipe.

[0040] However, the solid-liquid separation process of this technology relies entirely on the natural settling of the mixed liquor under static conditions. That is, it utilizes the density difference between the solid particles (mainly microbial flocs) and the liquid phase, which slowly sink under the action of gravity, eventually forming a high-concentration sludge layer at the bottom of the reactor body, while a relatively clear liquid phase layer forms at the top. This process is not only time-consuming, occupying a considerable portion of the entire treatment process and leading to a prolonged hydraulic retention time, but the settling effect is also easily affected by factors such as fluctuations in influent water quality, sludge properties (such as sludge bulking and granulation degree), temperature changes, and short-circuiting, resulting in unstable separation efficiency and reducing the wastewater treatment efficiency of the wastewater treatment device.

[0041] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0042] Combination Figure 1 and Figure 2 This application provides an anaerobic biofilm reactor, including a reactor body 100, a solid-liquid separation mechanism 200, and a drive mechanism 300. The reactor body 100 is provided with a feed pipe 110, an exhaust pipe 120, and a sludge discharge pipe 130. The solid-liquid separation mechanism 200 is located outside or inside the reactor body 100. The solid-liquid separation mechanism 200 has an input end 210, a liquid phase output end 220, and a solid phase output end 230. The solid phase output end 230 is connected to the interior of the reactor body 100. The drive mechanism 300 is used to transport the mixed liquid in the reactor body 100 along the input end 210 to the solid-liquid separation mechanism 200 so that the solid-liquid separation mechanism 200 can perform solid-liquid separation on the mixed liquid.

[0043] By adopting the above technical solution, the mixed liquid in the reactor body 100 is actively transported to the solid-liquid separation mechanism 200 for forced solid-liquid separation through the drive mechanism 300. Compared with the existing technology that relies on the natural sedimentation of solid products by gravity, this shortens the time required for solid-liquid separation of the mixed liquid and prevents the problem of process blockage caused by excessive natural sedimentation time. The synergistic effect of active transport and forced separation can improve the separation efficiency of the mixed liquid and the retention rate of solid products. The liquid products are quickly discharged through the liquid output end 220 of the solid-liquid separation mechanism 200, while the retained solid products are returned to the reactor body 100 through the solid output end 230. This prevents some microorganisms from being discharged with the liquid products, thereby maintaining the stability of the microbial concentration in the reactor body 100 to maintain the anaerobic degradation reaction efficiency and improve the wastewater treatment efficiency of the anaerobic biofilm reactor.

[0044] The solid-liquid separation mechanism 200 includes a membrane module.

[0045] In this embodiment, the membrane module is a microfiltration membrane, an ultrafiltration membrane, a hollow fiber membrane, or a flat sheet membrane.

[0046] By adopting the above technical solutions, microfiltration membranes and ultrafiltration membranes can achieve precise retention based on the particle size difference of solid particles in the mixed liquor, and can separate solid products such as activated sludge flocs and microbial communities in the mixed liquor after anaerobic degradation, thereby improving the clarity of liquid products. Hollow fiber membranes have the characteristics of large specific surface area and high membrane area per unit volume, which can provide higher separation flux within a limited installation space and improve solid-liquid separation efficiency. Flat sheet membrane modules have the advantages of stable structure, strong anti-fouling ability, and easy cleaning and maintenance, and can adapt to working conditions with high suspended solids concentration and large water quality fluctuations in anaerobic reaction mixed liquor.

[0047] like Figure 1 As shown, the solid-liquid separation mechanism 200 is located outside the reactor body 100;

[0048] A reflux mechanism 400 is provided between the solid output end 230 and the reactor body 100. The reflux mechanism 400 is used to transport the solid product output from the solid output end 230 to the interior of the reactor body 100.

[0049] In this embodiment, the feed pipe 110 is located at the top of the reactor body 100, the gas outlet pipe 120 is located at the top of the reactor body 100, and the sludge discharge pipe 130 is located at the bottom of the side wall of the reactor body 100.

[0050] By adopting the above technical solution, when the solid-liquid separation mechanism 200 is set outside the reactor body 100, the solid-liquid separation is physically isolated from the anaerobic degradation reaction inside the reactor body 100, preventing the separation process from interfering with the stability of the anaerobic environment and the activity of the microbial community inside the reactor body 100; operators do not need to enter the reactor body 100, thus facilitating offline cleaning, maintenance and replacement of the membrane module, reducing the operation and maintenance cost and downtime of the equipment.

[0051] A reflux mechanism 400 is set between the solid output end 230 and the reactor body 100 to transport the solid products such as activated sludge and microbial communities retained by the solid-liquid separation mechanism 200 back into the reactor body 100. This can continuously maintain a high concentration of functional microbial communities in the reactor body 100 and maintain the stable progress of the anaerobic degradation reaction. The refluxed solid products can be mixed with the new wastewater to improve the degradation rate of pollutants.

[0052] The return mechanism 400 includes:

[0053] The reflux pipeline has one end connected to the solid phase output end 230 and the other end connected to the reactor body 100.

[0054] By adopting the above technical solution and using a reflux pipeline, relying on the active power output of the drive mechanism 300, solid products can be output along the solid output end 230 and liquid products can be output along the liquid output end 220. This achieves precise and controllable control over the solid product reflux process. Based on the real-time control requirements of microbial concentration and mixed liquor sludge age within the reactor body 100, the operating power and frequency of the drive mechanism 300 can be flexibly adjusted to regulate the reflux rate and flow rate of the solid products. This ensures that the reactor body 100 always maintains a suitable concentration of functional microorganisms and a stable anaerobic degradation reaction environment, preventing microbial loss or excessively high concentrations due to unstable natural reflux rates.

[0055] The drive mechanism 300 includes:

[0056] The first conveying pipeline 310 has one end connected to the reactor body 100 and the other end connected to the input end 210.

[0057] The first delivery pump 320 is connected to the first delivery pipeline 310. The first delivery pump 320 is used to deliver the mixture in the reactor body 100 to the solid-liquid separation mechanism 200 along the first delivery pipeline 310 and the input end 210.

[0058] By adopting the above technical solution, relying on the active power output of the first transfer pump 320, the mixed liquid that has completed anaerobic degradation in the reactor body 100 is transported to the membrane module for solid-liquid separation, shortening the solid-liquid separation cycle. By adjusting the operating parameters of the first transfer pump 320, the delivery rate of the mixed liquid can be flexibly controlled to match the separation flux of the membrane module, preventing membrane module blockage caused by excessively fast mixed liquid feeding or low separation efficiency caused by excessively slow feeding. Furthermore, the operating power and frequency of the first transfer pump 320 can be flexibly adjusted to regulate the reflux rate and reflux volume of the solid product. The external arrangement of the first delivery pipeline 310 and the first transfer pump 320 facilitates inspection, maintenance, and troubleshooting by operators, eliminating the need to disassemble the reactor body 100 and reducing the difficulty of operation and maintenance.

[0059] In some embodiments, the membrane module is installed at a position higher than the liquid level of the reactor body 100, and the solid output end 230 of the solid-liquid separation mechanism 200 is connected to the reactor body 100 via a non-powered reflux pipeline. The solid products retained by the membrane module can naturally flow back to the reactor body 100 through the reflux pipeline by gravity, thus eliminating the need to install a transfer pump to transport the solid products.

[0060] like Figure 2As shown, in some embodiments, the solid-liquid separation mechanism 200 is disposed inside the reactor body 100, and the solid phase output end 230 is disposed inside the reactor body 100 to communicate with the interior of the reactor body 100.

[0061] By adopting the above technical solution, when the solid-liquid separation mechanism 200 is located inside the reactor body 100 and the solid output end 230 is located inside the reactor body 100, the solid products retained after solid-liquid separation do not need to rely on the reflux mechanism 400 and can fall directly back inside the reactor body 100. This eliminates the need for pipelines and pumps between the membrane module and the reactor body 100, reducing operating energy consumption and pipeline laying costs. Furthermore, it can quickly replenish the functional microbial community inside the reactor body 100 and maintain a stable microbial concentration in the system. The solid-liquid separation mechanism 200 being located inside the reactor body 100 reduces the floor space required, making it more suitable for applications with limited installation space.

[0062] The drive mechanism 300 includes a negative pressure delivery pump, which is connected to the liquid phase output end 220;

[0063] The negative pressure transfer pump is used to extract the liquid phase product in the liquid phase output end 220 to form a negative pressure in the input end 210, thereby driving the mixture in the reactor body 100 to enter the solid-liquid separation mechanism 200 along the input end 210.

[0064] By adopting the above technical solution, when the solid-liquid separation mechanism 200 is set inside the reactor body 100, the liquid phase product is extracted by a negative pressure delivery pump, and a negative pressure is formed at the input end 210 of the solid-liquid separation mechanism 200. This drives the mixed liquid inside the reactor body 100 to spontaneously flow into the membrane module to complete the solid-liquid separation. There is no need to configure an additional pump to transport the mixed liquid from inside the reactor body 100 to the input end 210 of the solid-liquid separation mechanism 200, which reduces operating energy consumption and equipment purchase costs. The negative pressure drive method can also adjust the flow rate of the mixed liquid by controlling the suction power of the negative pressure delivery pump, adapting it to the separation flux of the membrane module, and preventing membrane fouling caused by too fast feeding or low separation efficiency caused by too slow feeding.

[0065] The anaerobic membrane bioreactor also includes a gas distribution mechanism 500, which is located inside the reactor body 100 and is connected to the solid-liquid separation mechanism 200. The gas distribution mechanism 500 is used to supply gas to the solid-liquid separation mechanism 200.

[0066] In this embodiment, the air distribution mechanism 500 is a microporous aerator, a jet aerator, or an annular perforated air distribution pipe.

[0067] By adopting the above technical solution, the gas distribution mechanism 500 generates bubbles by supplying gas to the surface or surrounding area of ​​the membrane module. The shear force generated during the rise of the bubbles washes over the surface of the membrane module, while simultaneously driving the mixed liquid inside the reactor body 100 to form a turbulent flow. This breaks down pollutants such as sludge flocs and colloidal particles attached to the surface of the membrane module, preventing membrane pore blockage and filter cake layer thickening. It eliminates the need for frequent disassembly of the membrane module for offline cleaning, reducing membrane fouling control costs and downtime for equipment maintenance. The rising bubbles and turbulent flow field can enhance the mass transfer efficiency between the substrate and microorganisms in the mixed liquid, increasing the anaerobic degradation reaction rate. Compared with chemical cleaning and other methods, physical aeration cleaning is more environmentally friendly, has no risk of secondary pollution, can extend the service life of the membrane module, and improve the long-term stable operation and comprehensive treatment efficiency of the anaerobic biofilm reactor.

[0068] The gas distribution mechanism 500 is located at the bottom of the solid-liquid separation mechanism 200.

[0069] By adopting the above technical solution, the gas distribution mechanism 500 is set at the bottom of the solid-liquid separation mechanism 200 immersed in the reactor body 100. This allows the bubbles released by the gas distribution mechanism 500 to uniformly disperse upwards along the surface of the membrane module, forming a continuous gas-liquid scouring flow field from bottom to top. The shear force generated during the rising of the bubbles physically peels off pollutants such as sludge flocs and colloidal particles from the surface of the membrane module, improving the coverage area when cleaning the membrane module and preventing cleaning blind spots. At the same time, the upward flow of bubbles can drive the mixed liquid in the reactor body 100 to form a stable upward turbulent flow, enhancing the contact efficiency between the mixed liquid and the membrane module, improving the solid-liquid separation rate, reducing the deposition of solid products at the bottom of the membrane module, and reducing the risk of membrane fouling.

[0070] The anaerobic membrane bioreactor also includes a gas delivery mechanism 600, which is connected between the gas distribution mechanism 500 and the gas outlet pipe 120. The gas delivery mechanism 600 is used to deliver a portion of the gas in the gas outlet pipe 120 to the interior of the gas distribution mechanism 500.

[0071] By adopting the above technical solution, the gas conveying mechanism 600 is connected between the gas distribution mechanism 500 and the gas outlet pipe 120. The biogas generated by the anaerobic degradation reaction is used as the gas source for the gas distribution mechanism 500 and transported to the gas distribution mechanism 500. By recycling the biogas, there is no need to configure an additional air compressor or purchase an external gas source, which reduces the operating energy consumption and gas source cost of the device. At the same time, the inert nature of biogas will not introduce oxygen into the reactor body 100, which can prevent the aerobic environment from inhibiting and destroying the activity of anaerobic bacteria and maintain the stability of the anaerobic reaction conditions in the reactor body 100.

[0072] The gas delivery mechanism 600 includes:

[0073] The second conveying pipe 610 has one end connected to the air outlet pipe 120 and the other end connected to the air distribution mechanism 500.

[0074] The second delivery pump 620 is connected to the second delivery pipeline 610. The second delivery pump 620 is used to deliver part of the gas in the gas outlet pipe 120 to the inside of the gas distribution mechanism 500 along the second delivery pipeline 610.

[0075] In this embodiment, a portion of the second delivery pipeline 610 is disposed inside the reactor body 100.

[0076] By adopting the above technical solution, a portion of the biogas in the gas outlet pipe 120 is transported to the gas distribution mechanism 500 using the second delivery pipeline 610 and the second delivery pump 620. The delivery rate and distribution volume of biogas are regulated by the power output of the second delivery pump 620, which is adapted to the online cleaning requirements of the membrane module and prevents the problem of membrane fouling aggravated due to insufficient gas distribution or the problem of excessive gas distribution disturbing the anaerobic reaction system.

[0077] The anaerobic biofilm reactor provided in this application, when the membrane module is set outside the reactor body 100, the wastewater to be treated enters the reactor body 100 through the feed pipe 110, and completes the anaerobic degradation reaction to form a mixed liquid in an anaerobic environment. Then, the mixed liquid in the reactor body 100 is actively transported to the membrane module for solid-liquid separation by the first conveying pipeline 310 and the first conveying pump 320. The liquid phase product is discharged through the liquid phase output end 220 of the membrane module, and the retained solid phase product is transported back to the reactor body 100 through the solid phase output end 230 and the return pipeline. The biogas generated during the anaerobic degradation process is discharged through the gas outlet pipe 120.

[0078] When the membrane module is installed inside the reactor body 100, the wastewater to be treated enters the reactor body 100 through the feed pipe 110 and completes the anaerobic degradation reaction to form a mixed liquid in an anaerobic environment. The negative pressure delivery pump connected to the liquid phase output end 220 is started. By extracting the liquid phase product, a negative pressure is formed at the input end 210 of the membrane module, which drives the mixed liquid in the reactor body 100 to flow into the membrane module for solid-liquid separation. The separated liquid phase product is discharged through the liquid phase output end 220. The retained solid phase product does not require an additional reflux mechanism 400 and falls directly back inside the reactor body 100. The biogas generated by anaerobic degradation is discharged through the gas outlet pipe 120. Part of the biogas is delivered to the gas distribution mechanism 500 set at the bottom of the membrane module through the second delivery pipeline 610 and the second delivery pump 620. The released bubbles escape from bottom to top along the surface of the membrane module and use the bubble shear force to flush the membrane surface online.

[0079] The mixed liquid in the reactor body 100 is transported to the solid-liquid separation mechanism 200 for forced solid-liquid separation. Compared with the existing technology that relies on the natural sedimentation of solid products by gravity, this shortens the time required for solid-liquid separation of the mixed liquid and improves the wastewater treatment efficiency of the anaerobic biofilm reactor.

[0080] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. An anaerobic biofilm reactor, characterized in that, include: The reactor body (100) is provided with a feed pipe (110), an exhaust pipe (120) and a sludge discharge pipe (130); A solid-liquid separation mechanism (200) is provided outside or inside the reactor body (100). The solid-liquid separation mechanism (200) has an input end (210), a liquid phase output end (220) and a solid phase output end (230). The solid phase output end (230) is connected to the interior of the reactor body (100). A drive mechanism (300) is used to transport the mixture in the reactor body (100) along the input end (210) to the solid-liquid separation mechanism (200) so that the solid-liquid separation mechanism (200) can perform solid-liquid separation on the mixture.

2. The anaerobic biofilm reactor according to claim 1, characterized in that, The solid-liquid separation mechanism (200) includes a membrane module.

3. The anaerobic biofilm reactor according to claim 1 or 2, characterized in that, The solid-liquid separation mechanism (200) is located outside the reactor body (100); A reflux mechanism (400) is provided between the solid output end (230) and the reactor body (100). The reflux mechanism (400) is used to transport the solid product output from the solid output end (230) to the interior of the reactor body (100).

4. The anaerobic biofilm reactor according to claim 3, characterized in that, The return mechanism (400) includes: The return pipeline has one end connected to the solid phase output end (230) and the other end connected to the reactor body (100).

5. The anaerobic biofilm reactor according to claim 3, characterized in that, The drive mechanism (300) includes: A first delivery pipeline (310) is connected at one end to the reactor body (100) and at the other end to the input end (210). A first delivery pump (320) is connected to a first delivery pipeline (310). The first delivery pump (320) is used to deliver the mixture in the reactor body (100) along the first delivery pipeline (310) and the input end (210) to the solid-liquid separation mechanism (200).

6. The anaerobic biofilm reactor according to claim 1 or 2, characterized in that, The solid-liquid separation mechanism (200) is located inside the reactor body (100), and the solid phase output end (230) is located inside the reactor body (100) to communicate with the interior of the reactor body (100).

7. The anaerobic biofilm reactor according to claim 6, characterized in that, The drive mechanism (300) includes a negative pressure delivery pump, which is connected to the liquid phase output end (220); The negative pressure delivery pump is used to extract the liquid phase product in the liquid phase output end (220) to form a negative pressure in the input end (210), thereby driving the mixture in the reactor body (100) to enter the interior of the solid-liquid separation mechanism (200) along the input end (210).

8. The anaerobic biofilm reactor according to claim 6, characterized in that, It also includes a gas distribution mechanism (500), which is disposed inside the reactor body (100) and connected to the solid-liquid separation mechanism (200). The gas distribution mechanism (500) is used to supply gas to the solid-liquid separation mechanism (200).

9. The anaerobic biofilm reactor according to claim 8, characterized in that, It also includes a gas delivery mechanism (600), which is connected between the gas distribution mechanism (500) and the gas outlet pipe (120). The gas delivery mechanism (600) is used to deliver a portion of the gas in the gas outlet pipe (120) to the interior of the gas distribution mechanism (500).

10. The anaerobic biofilm reactor according to claim 9, characterized in that, The gas delivery mechanism (600) includes: The second delivery pipe (610) has one end connected to the air outlet pipe (120) and the other end connected to the air distribution mechanism (500). The second delivery pump (620) is connected to the second delivery pipeline (610). The second delivery pump (620) is used to deliver part of the gas in the gas outlet pipe (120) to the interior of the gas distribution mechanism (500) along the second delivery pipeline (610).

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