Efficient bioreactor

Abstract

The utility model relates to the technical field of sewage treatment, and particularly discloses an efficient bioreactor which is characterized in that an inner cavity of a reaction box body is provided with a reaction cavity I, a reaction cavity II, a reaction cavity III, a reaction cavity IV and an MBR membrane cavity, a water passing hole I is formed between the bottoms of the reaction cavity I and the reaction cavity II, a water passing hole II is formed between the tops of the reaction cavity II and the reaction cavity III, and a water passing hole III is formed between the bottoms of the reaction cavity III and the reaction cavity IV; a fourth water passing hole is formed between the fourth reaction cavity and the top of the MBR membrane cavity; the water inlet system is used for introducing to-be-treated sewage into the reaction cavity I; the guide cylinders are respectively and vertically arranged in the first reaction cavity, the second reaction cavity, the third reaction cavity and the fourth reaction cavity; the MBR membrane component is arranged in the MBR membrane cavity; the aerator is arranged in the middle of the inner cavity of the guide cylinder; the aeration head is arranged below the MBR membrane component; the aeration system supplies air to the aerator and the aeration head; the water outlet system is used for pumping clean water at the water outlet end of the MBR membrane component; the sludge discharge system is used for refluxing sludge at the bottom of the MBR membrane cavity to the reaction cavity I and discharging the sludge; the problems of low sewage treatment efficiency and high input cost are well solved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a high-efficiency bioreactor. Background Technology

[0002] With the acceleration of urbanization and the continuous development of industrialization, the amount of sewage discharged is increasing year by year, and the demand for sewage treatment services is also growing. At the same time, due to water scarcity and the increasing attention paid to water environmental quality by the public, enterprises and residents are also raising their requirements for sewage treatment.

[0003] Currently, biological wastewater treatment methods used both domestically and internationally are mainly divided into activated sludge processes and biofilm processes. Common processes include oxidation ditches, A / B processes, and A... 2 Activated sludge treatment processes include anaerobic, anoxic, aerobic, and sedimentation processes, as well as biological rotating discs and biological contact oxidation. Most wastewater treatment plants employ a main process flow that includes anaerobic, anoxic, aerobic, and sedimentation processes. Depending on the influent water quality, effluent requirements, and application scenarios, these processes are typically combined and optimized to achieve better pollutant removal. Specifically, currently, the most commonly used activated sludge treatment processes in most wastewater treatment plants mainly include the following:

[0004] (1)A 2 / O+ Sedimentation Tank

[0005] A 2 The / O process enables the degradation of organic matter while simultaneously removing nitrogen and phosphorus. After pretreatment, wastewater enters the anaerobic zone. The effluent from the anaerobic zone merges with the mixed liquor returned from the aerobic tank and enters the anoxic zone. After the reaction in the anoxic zone, the wastewater enters the aerobic zone. The effluent from the aerobic zone enters the secondary sedimentation tank for sludge-water separation. A portion of the sludge is returned to the front end of the anaerobic zone, while the remaining sludge is discharged into the sludge treatment system. The wastewater then continues to be processed in subsequent stages.

[0006] (2) Oxidation ditch + sedimentation tank

[0007] An oxidation ditch typically consists of a ditch body, aeration equipment, inlet and outlet water devices, and flow guiding and mixing equipment. Its aeration tank is a closed channel, and its hydraulic flow pattern differs from the traditional activated sludge process. It is a circulating flow aeration ditch with interconnected ends, utilizing the contact between water flow and oxygen to achieve the biochemical functions of microorganisms. Then, the wastewater enters a sedimentation tank to achieve sludge-water separation.

[0008] (3) Sequencing batch activated sludge process

[0009] The Sequencing Batch Reactor (SBR) is a newly developed activated sludge process in recent years, both domestically and internationally. Its key feature is that it integrates primary sedimentation, biodegradation, and secondary sedimentation into a single tank, eliminating the need for a sludge return system. The biochemical reactions occur in batches, with a basic operating cycle consisting of five steps: influent, aeration, sedimentation, effluent discharge, and idle period, thus achieving pollutant degradation.

[0010] In summary, currently widely used wastewater treatment systems typically integrate anaerobic, anoxic, and aerobic treatment components into different reaction tanks, resulting in a long process chain. This undoubtedly leads to problems such as large footprint, non-compact structure, unreasonable carbon source allocation and utilization, low wastewater treatment efficiency, high energy consumption, high overall equipment investment costs, and demanding operation and management requirements. Therefore, improving wastewater treatment rates and levels while reducing wastewater treatment costs has become a top priority. Utility Model Content

[0011] The purpose of this invention is to provide a high-efficiency bioreactor to solve the problems of low wastewater treatment efficiency and high investment costs.

[0012] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency bioreactor, wherein the internal cavity of the reaction chamber is provided with reaction chamber one, reaction chamber two, reaction chamber three, reaction chamber four, and an MBR membrane chamber; a water passage one is provided between the bottom of reaction chamber one and reaction chamber two, a water passage two is provided between the top of reaction chamber two and reaction chamber three, a water passage three is provided between the bottom of reaction chamber three and reaction chamber four, and a water passage four is provided between reaction chamber four and the top of the MBR membrane chamber; the water inlet system is used to introduce the wastewater to be treated into reaction chamber one; Multiple guide tubes are vertically arranged in reaction chamber one, reaction chamber two, reaction chamber three, and reaction chamber four, respectively; the MBR membrane module is arranged in the MBR membrane chamber; the aerators are respectively arranged in the middle of the inner cavity of the guide tubes; the aeration head is arranged below the MBR membrane module; the aeration system is used to supply air to the aerators and aeration heads respectively; the effluent system is used to pump out the clean water from the effluent end of the MBR membrane module; the sludge discharge system is used to return a portion of the sludge at the bottom of the MBR membrane chamber to reaction chamber one and to discharge the remaining sludge.

[0013] Preferably, it also includes a dosing system for adding a drug to the MBR membrane cavity.

[0014] Preferably, it also includes a carbon source system for replenishing carbon sources into the first reaction chamber, the second reaction chamber, the third reaction chamber, and the fourth reaction chamber, respectively.

[0015] Preferably, the reaction chamber is a vertically oriented cylindrical shell structure, the MBR membrane cavity is located in the middle of the reaction chamber, and the reaction chamber one, reaction chamber two, reaction chamber three and reaction chamber four are arranged circumferentially around the MBR membrane cavity.

[0016] Preferably, the reaction chamber has a water inlet interface on the top of the side wall corresponding to the reaction chamber one, which is connected to the output end of the water inlet system.

[0017] Preferably, a sludge discharge pipe is provided on the bottom surface of the reaction chamber corresponding to the middle of the MBR membrane cavity, and a sludge return interface is provided on the side wall of the reaction chamber corresponding to the top of the reaction cavity. The sludge discharge system includes a sludge pump whose input end is connected to the sludge discharge pipe port and a sludge pipeline connected to the output end of the sludge pump. The sludge pipeline includes a branch pipe connected to the sludge return interface, a branch pipe for external sludge discharge, and valves provided on the two branch pipes.

[0018] Preferably, the aeration system includes a blower and a duct assembly. The duct assembly includes a main duct with its input end connected to the air outlet of the blower, branch ducts with their input ends connected to the main duct, and vertical ducts with their top ends connected to the output ends of the branch ducts and their bottom ends connected to the input ends of the aerator and the aeration head, respectively.

[0019] Preferably, the water outlet system includes a suction pump and an outlet pipe connected between the input end of the suction pump and the outlet of the MBR membrane module.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This utility model relates to a high-efficiency bioreactor that integrates anaerobic, anoxic, and aerobic treatment processes with MBR into a single bioreactor, which can significantly reduce the footprint and lower investment.

[0022] 2. When the high-efficiency bioreactor involved in this utility model is used, the bubbles generated by aeration form an internal circulation flow in the reactor, avoiding a large amount of backflow and mechanical stirring, thereby significantly reducing energy consumption.

[0023] 3. The high-efficiency bioreactor involved in this utility model has a simple overall structure, easy-to-adjust control method, and convenient operation and management.

[0024] 4. The high-efficiency bioreactor involved in this utility model enhances the mass transfer effect of the reaction system through internal circulation flow, and the multi-stage biological reaction process can significantly improve the denitrification and phosphorus removal effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the system structure of this utility model;

[0026] Figure 2 This is a top view of the overall structure of this utility model;

[0027] Figure 3 This utility model Figure 2 Schematic diagram of the sectional structure of the middle AA section;

[0028] Figure 4 This utility model Figure 2 Schematic diagram of the cross-sectional structure of the middle BB.

[0029] In the diagram: 1-Reaction chamber; 1.1-Reaction chamber one; 1.2-Reaction chamber two; 1.3-Reaction chamber three; 1.4-Reaction chamber four; 1.5-MBR membrane chamber; 1.6-Water passage one; 1.7-Water passage two; 1.8-Water passage three; 1.9-Water passage four; 1.10-Sludge discharge pipe; 1.11-Inlet port; 1.12-Sludge return port;

[0030] 2-Water inlet system;

[0031] 3-Guide tube;

[0032] 4-MBR membrane module;

[0033] 5-Aeration system; 5.1-Blower; 5.2-Duct assembly; 5.2.1-Main duct; 5.2.2-Branch duct; 5.2.3-Vertical duct;

[0034] 6-Aerator;

[0035] 7-Aeration head;

[0036] 8-Water outlet system; 8.1-Suction pump; 8.2-Water outlet pipe;

[0037] 9-Sludge discharge system; 9.1-Sludge pump; 9.2-Sludge pipeline;

[0038] 10-Dosing system;

[0039] 11-Carbon source system;

[0040] 12-Fixing ring. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] Please see Figure 1-4 This utility model provides a technical solution: a high-efficiency bioreactor, wherein the inner cavity of the reaction chamber 1 is provided with reaction chamber one 1.1, reaction chamber two 1.2, reaction chamber three 1.3, reaction chamber four 1.4 and MBR membrane chamber 1.5; a water passage one 1.6 is provided between the bottom of reaction chamber one 1.1 and reaction chamber two 1.2; a water passage two 1.7 is provided between the top of reaction chamber two 1.2 and reaction chamber three 1.3; a water passage three 1.8 is provided between the bottom of reaction chamber three 1.3 and reaction chamber four 1.4; and a water passage four 1.9 is provided between reaction chamber four 1.4 and the top of MBR membrane chamber 1.5; the inlet system is used to introduce the wastewater to be treated. Water is introduced into reaction chamber 1.1; multiple guide tubes 3 are vertically arranged in reaction chambers 1.1, 1.2, 1.3, and 1.4 respectively; the MBR membrane module 4 is located in the MBR membrane chamber 1.5; aerators 6 are respectively located in the middle of the inner cavity of the guide tubes 3; aeration heads 7 are located below the MBR membrane module 4; the aeration system 5 is used to supply air to the aerators 6 and aeration heads 7 respectively; the effluent system 8 is used to pump out the clean water from the effluent end of the MBR membrane module 4; the sludge discharge system 9 is used to return a portion of the sludge at the bottom of the MBR membrane chamber 1.5 to reaction chamber 1.1 and to discharge the remaining sludge. It also includes a dosing system 10 for adding chemicals to the MBR membrane chamber 1.5 and a carbon source system 11 for supplementing carbon sources to reaction chambers 1.1, 1.2, 1.3, and 1.4 respectively.

[0043] The reaction chamber 1 is a vertically oriented cylindrical shell structure. The MBR membrane chamber 1.5 is located in the middle of the reaction chamber 1. Reaction chamber 1.1, reaction chamber 2.2, reaction chamber 3.3, and reaction chamber 4.4 are arranged circumferentially around the MBR membrane chamber 1.5. A water inlet interface 1.11, connected to the output end of the water inlet system 2, is located on the top side wall of the reaction chamber 1 corresponding to the top of reaction chamber 1.1. A sludge discharge pipe 1.10 is located on the bottom surface of the reaction chamber 1 at the middle position of the MBR membrane chamber 1.5. A sludge return interface 1.12 is located on the side wall of the reaction chamber 1 at the top position of reaction chamber 1.1. The sludge discharge system 9 includes a sludge pump 9.1 connected to the port of the sludge discharge pipe 1.10 at its input end and a sludge pipeline 9.2 connected to the output end of the sludge pump 9.1. The sludge pipeline 9.2 includes a branch pipe connected to the sludge return interface 1.12, a branch pipe for external sludge discharge, and valves on both branch pipes. The aeration system 5 includes a blower 5.1 and a duct assembly 5.2. The duct assembly 5.2 includes a main duct 5.2.1 with its input end connected to the outlet of the blower 5.1, branch ducts 5.2.2 with their input ends connected to the main duct 5.2.1, and vertical pipes 5.2.3 with their top ends connected to the outlets of the branch ducts 5.2.2 and their bottom ends connected to the input ends of the aerator 6 and the aerator head 7, respectively. The effluent system 8 includes a suction pump 8.1 and an effluent pipe 8.2 connected between the input end of the suction pump 8.1 and the outlet of the MBR membrane module 4.

[0044] In summary, wastewater enters reaction chamber 1.1 from inlet system 2 via inlet interface 1.11. The wastewater then sequentially passes through water tunnel 1.6 into reaction chamber 2.2, through water tunnel 2.7 into reaction chamber 3.3, through water tunnel 3.8 into reaction chamber 4.4, and finally through water tunnel 4.9 into MBR membrane chamber 1.5.

[0045] Blower 5.1 supplies air to aerator 6 and aeration head 7 through main air duct 5.2.1, branch air duct 5.2.2 and vertical pipe 5.2.3 respectively. Air passing through aerator 6 generates microbubbles at the bottom of the inner cavity of guide pipe 3. Sewage and microbubbles mix and oxygenate in the limited space of the guide tube. Due to the air lift effect generated by the bubbles, the bubbles and mud-water mixture rise to the top of the guide tube. Microbubbles collide and merge with each other in the guide tube and are released to the water surface, while the mud-water mixture sinks and flows, and then re-enters the guide tube, forming a circulation flow from the center to the periphery of the guide tube.

[0046] Each reaction chamber is equipped with a guide tube 3 and an aerator 6. The gas and sludge mixture are thoroughly mixed in the guide tube 3, removing some organic matter. Simultaneously, ammonia nitrogen and organic nitrogen react with nitrifying bacteria to produce nitrates, and polyphosphate-accumulating bacteria absorb excess phosphorus. As pollutants degrade and oxygen is consumed, anoxic and anaerobic zones are formed within the reaction zone. Raw water enters the anoxic zone (DO≤0.5mg / L), where denitrifying bacteria use undecomposed carbonaceous organic matter in the wastewater as a carbon source, reducing nitrates to N2 and releasing it. After passing through the anaerobic zone, polyphosphate-accumulating bacteria release phosphorus during this stage, while some organic matter undergoes ammoniation. Ultimately, simultaneous removal of carbon, nitrogen, and phosphorus is achieved. Furthermore, the agitation of bubbles and the continuously circulating sludge mixture within the internal circulation bioreactor further enhance the mass transfer between pollutants and microorganisms, ensuring the effective removal of carbon, nitrogen, and phosphorus.

[0047] Finally, the treated wastewater enters the MBR membrane chamber 1.5, where the MBR membrane module 4 replaces the traditional secondary sedimentation tank, retaining activated sludge in the water and maintaining a high concentration of activated sludge in the bioreactor, thus increasing the load on the biological treatment system. Simultaneously, the excellent filtration performance of the membrane module removes residual suspended solids and microorganisms, ensuring that the effluent meets reuse standards. The MBR membrane chamber 1.5 contains the MBR membrane module 4, with aeration heads 7 at the bottom. Most of the COD in this section is further degraded. Simultaneously, the MBR membrane module 4 performs sludge-water separation, and the treated raw water is discharged from the reactor through the effluent system 8. At the same time, a sludge discharge pipe 1.10 is located at the bottom of the MBR membrane chamber 1.5. The sludge generated in the MBR membrane chamber 1.5 is returned to the reaction chamber 1.1 via the sludge discharge system 9, and the remaining sludge is discharged to the sludge treatment facility for treatment and then transported off-site.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency bioreactor, characterized in that, include: The reaction chamber (1) has a cavity containing a reaction chamber 1 (1.1), a reaction chamber 2 (1.2), a reaction chamber 3 (1.3), a reaction chamber 4 (1.4), and an MBR membrane chamber (1.5). A water passage 1 (1.6) is provided between the bottom of the reaction chamber 1 (1.1) and the bottom of the reaction chamber 2 (1.2). A water passage 2 (1.7) is provided between the top of the reaction chamber 2 (1.2) and the top of the reaction chamber 3 (1.3). A water passage 3 (1.8) is provided between the bottom of the reaction chamber 3 (1.3) and the bottom of the reaction chamber 4 (1.4). A water passage 4 (1.9) is provided between the top of the reaction chamber 4 (1.4) and the top of the MBR membrane chamber (1.5). Water inlet system (2), the water inlet system being used to introduce the wastewater to be treated into the reaction chamber (1.1); The guide tubes (3) are arranged vertically in the reaction chamber one (1.1), reaction chamber two (1.2), reaction chamber three (1.3) and reaction chamber four (1.4); MBR membrane module (4), wherein the MBR membrane module (4) is disposed within the MBR membrane cavity (1.5); Aerators (6) are respectively located in the middle of the inner cavity of the guide tube (3); An aeration head (7) is located below the MBR membrane module (4); An aeration system (5) is provided for supplying air to the aerator (6) and the aeration head (7) respectively. Water outlet system (8), the water outlet system (8) is used to pump out the clean water from the outlet end of the MBR membrane module (4); The sludge discharge system (9) is used to return a portion of the sludge at the bottom of the MBR membrane chamber (1.5) to the reaction chamber (1.1) and to discharge the remaining sludge.

2. The high-efficiency bioreactor according to claim 1, characterized in that: It also includes a dosing system (10) for adding a drug to the MBR membrane cavity (1.5).

3. The high-efficiency bioreactor according to claim 1, characterized in that: It also includes a carbon source system (11) for replenishing carbon sources into the first reaction chamber (1.1), the second reaction chamber (1.2), the third reaction chamber (1.3) and the fourth reaction chamber (1.4) respectively.

4. The high-efficiency bioreactor according to claim 1, characterized in that: The reaction chamber (1) is a vertically placed cylindrical shell structure. The MBR membrane cavity (1.5) is located in the middle of the reaction chamber (1). The reaction cavities 1 (1.1), 2 (1.2), 3 (1.3) and 4 (1.4) are arranged circumferentially around the MBR membrane cavity (1.5).

5. A high-efficiency bioreactor according to claim 4, characterized in that: The reaction chamber (1) has a water inlet (1.11) on the top of the side wall corresponding to the reaction chamber (1.1) that is connected to the output end of the water inlet system (2).

6. A high-efficiency bioreactor according to claim 4, characterized in that: The bottom surface of the reaction chamber (1) is provided with a sludge discharge pipe (1.10) at the position corresponding to the middle of the MBR membrane chamber (1.5). The side wall of the reaction chamber (1) is provided with a sludge return interface (1.12) at the position corresponding to the top of the reaction chamber (1.1). The sludge discharge system (9) includes a sludge pump (9.1) whose input end is connected to the port of the sludge discharge pipe (1.10) and a sludge pipeline (9.2) connected to the output end of the sludge pump (9.1). The sludge pipeline (9.2) includes a branch pipe connected to the sludge return interface (1.12), a branch pipe for external sludge discharge, and valves provided on the two branch pipes.

7. A high-efficiency bioreactor according to claim 1, characterized in that: The aeration system (5) includes a blower (5.1) and a duct assembly (5.2). The duct assembly (5.2) includes a main duct (5.2.1) with its input end connected to the air outlet of the blower (5.1), branch ducts (5.2.2) with their input ends connected to the main duct (5.2.1), and vertical pipes (5.2.3) with their top ends connected to the output ends of the branch ducts (5.2.2) and their bottom ends connected to the input ends of the aerator (6) and the aeration head (7).

8. The high-efficiency bioreactor according to claim 1, characterized in that: The water outlet system (8) includes a suction pump (8.1) and an outlet pipe (8.2) connected between the input end of the suction pump (8.1) and the outlet of the MBR membrane module (4).

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