31 results about "Oxidation ditch" patented technology

The invention discloses an oxidation ditch sludge state monitoring method and system, and relates to the field of computers, and the method comprises the steps: obtaining image data; generating unique metadata for each piece of image data; performing data annotation on the image data; recognizing the image data according to the image recognition model to obtain a recognition result; the metadata and the recognition result are fused, and cue words are constructed; inputting the cue word into the large model to obtain an analysis result; and generating a diagnosis report according to the analysis result. Through high-precision image monitoring and the deep reasoning analysis capability of a large model, the sludge state change is mastered in real time, so that the real-time, accurate and intelligent monitoring and diagnosis of key indexes such as sludge structure stability and filamentous bacteria abundance are realized.

This invention discloses a method for treating high-COD benzene-containing wastewater from phenol and acetone production, comprising sequential pretreatment and biological treatment. The pretreatment includes a single-effect falling film evaporator, a first-effect evaporator, a second-effect evaporator, and a third-effect evaporator. The biological treatment includes an acidification hydrolysis tank, an oxidation ditch, a primary aerobic tank, a secondary aerobic tank, a primary sedimentation tank, a secondary sedimentation tank, and a sludge thickening tank. This invention achieves chain-breaking degradation and carbon reduction, effectively treating the wastewater and ensuring that the final effluent meets the prescribed discharge requirements.

The invention provides a rotary disc aerator with spiral plug flow, which overcomes the tedious structure of an oxidation ditch rotary disc aerator, is reasonable in design and good in aeration effect, and comprises a driving motor, a speed reducer, a mounting frame, a rotating shaft, a main shaft and a rotary disc which are connected in sequence, the main shaft is longitudinally distributed and is driven by a motor, and the core is that the rotating disc aerator and the water impeller are combined into a whole, so that the unification of surface flow pushing and mechanical aeration is realized.

The utility model discloses an oxidation ditch type sewage nitrogen and phosphorus removal device, and relates to the technical field of sewage treatment. The oxidation ditch type sewage nitrogen and phosphorus removal device comprises a sewage aeration tank and a defoaming mechanism, the defoaming mechanism comprises a mounting plate, a threaded rod, a driving motor, a sliding block, a connecting rod, a fixing frame, a limiting strip and a rotating baffle, the mounting plate is fixedly connected to the surface of the sewage aeration tank, and the threaded rod is rotationally connected to the surface of the mounting plate; the driving motor is fixedly connected to the surface of the mounting plate, the output end of the driving motor is fixedly connected with the threaded rod, floating foam can be scraped into the foam treatment pond through movement of the rotating baffle, the water surface cleanliness is improved, the rotating baffle rotates on the outer surface of the connecting rod under water flow resistance when resetting, and the rotating baffle is driven to rotate. And therefore, a gap is formed between the rotating baffle and the fixing frame, floating foam can be discharged from the gap, the situation that the floating foam is scraped to the other side during resetting is avoided, the device is cleaner, and the cleaning difficulty is reduced.

The utility model discloses an air push flow type bottom exposure oxidation ditch system belongs to biochemical treatment technical field of sewage treatment plant. The system includes oxidation ditch pool body, and oxidation ditch pool body is by the water inlet pipe, anaerobic area, anoxic area, aerobic area and water outlet pipe who links to each other in proper order is formed, and its characterized in that: the aeration assembly and push flow subassembly are equipped in the aerobic area, and the gas supply subassembly that supplies the aeration assembly and push flow subassembly is equipped with in the pool body side of aerobic area, and the aeration assembly and push flow subassembly are respectively by multiple aeration ware units and air push flow unit who set up along the pool body longitudinal interval are formed, and the air push flow unit includes gas supply cross pipe, and multiple gas supply vertical pipes who extend to the pool bottom and can be dismantled are arranged at the gas supply cross pipe interval, and the bottom push flow ware and middle push flow ware are all installed on the gas supply vertical pipe. The oxidation ditch system is the novel oxidation ditch system that sets high -efficient aeration, air push flow, convenient repair as a whole.

The invention discloses an oxidation ditch effluent total nitrogen control method based on a precise aeration system. The method comprises the following steps: constructing a mathematical model between oxidation ditch effluent total nitrogen and ammonia nitrogen concentration; calculating the corresponding ammonia nitrogen concentration as a control target through a mathematical model according to the target value of the effluent total nitrogen; the accurate aeration system calculates the initial aeration amount required by the oxidation ditch according to the control target; measuring the real-time ammonia nitrogen concentration of the effluent through an ammonia nitrogen on-line measuring instrument arranged at the water outlet end of the oxidation ditch; the accurate aeration system determines the actual air demand according to the control target and the real-time ammonia nitrogen concentration, and adjusts the horizontal shaft surface aeration equipment in combination with the initial aeration quantity to realize the total nitrogen control of the effluent of the oxidation ditch. According to the method, a mathematical model between oxidation ditch effluent total nitrogen and ammonia nitrogen is established, the oxidation ditch effluent total nitrogen is controlled by applying an accurate aeration system, denitrification optimal distribution between secondary treatment and deep treatment is realized, and quality improvement and efficiency improvement of a reclaimed water plant are assisted.

The application relates to the technical field of sewage treatment, and discloses a denitrification oxidation ditch, which comprises a plurality of ring channels, the ring channels are sequentially sleeved from inside to outside, a channel is formed between two adjacent ring channels, the channel is divided into a first channel, a second channel and a third channel, the first channel and the third channel are both communicated with the second channel, the first channel is provided with a water inlet, the third channel is provided with a water outlet one, and the dissolved oxygen concentration ratio of the first channel, the second channel and the third channel is (0.5-1):(0-0.5):(2-3). Through the technical scheme, the problem of low total nitrogen removal efficiency of the outlet water of the Orbal oxidation ditch in the prior art is solved.

The utility model discloses an oxidation ditch type A2 / O nitrogen and phosphorus removal device, and relates to the technical field of treatment of water, wastewater, sewage or sludge. An oxidation ditch type A2 / O nitrogen and phosphorus removal device comprises a non-aeration oxidation ditch, an aeration oxidation ditch and a sedimentation tank which are connected through pipelines, and a foam fishing structure which is located on the aeration oxidation ditch and comprises a discharging pipe, a fishing frame, a plurality of fishing plates and a gear ring. The discharging pipe is fixedly connected to the interior of the aeration oxidation ditch, one end of the discharging pipe rotationally extends to the exterior of the aeration oxidation ditch, under the cooperation of the discharging pipe, the salvage frame, the salvage plates, a gear ring and a gear, the salvage frame can drive the multiple salvage plates to salvage foam floating on the sewage surface, and therefore sewage in the salvage plates can be discharged through water filtering holes; and the salvage plate can discharge the salvaged foam into the discharge pipe, so that the foam can be salvaged continuously and effectively.

The utility model relates to an oxidation ditch convenient for sewage treatment, which comprises an oxidation ditch body, a driving device is arranged outside the oxidation ditch body, the driving device comprises a mounting rod, the mounting rod is fixedly mounted on the outer surface of the oxidation ditch body, a threaded rod is rotatably connected inside the mounting rod, and the threaded rod is fixedly connected with the oxidation ditch body. And a driving motor is fixedly mounted on the left side of the mounting rod. According to the oxidation ditch convenient for sewage treatment, a U-shaped frame is controlled to move through an arranged driving device, so that a treatment device on the U-shaped frame is driven to move, an electric sliding rail is matched with a hinge rod to drive a lifting plate to move, so that the treatment device on the lifting plate is driven to move up and down, and then the sewage treatment effect is enhanced through the arranged treatment device; meanwhile, the generated floating foam is treated, and the oxidation ditch body is cleaned, so that the purposes of conveniently treating the sewage, cleaning the generated floating foam and cleaning the device are achieved.

The invention relates to the technical field of sewage treatment, in particular to a non-stop oxidation ditch-MBR sewage treatment upgrading and reconstruction device and method.The non-stop oxidation ditch-MBR sewage treatment upgrading and reconstruction device comprises an MBR aeration membrane assembly, the MBR aeration membrane assembly is arranged at the bottom of an oxidation ditch and located in front of a water impeller, and the MBR aeration membrane assembly comprises a lower aeration body, a top plate, a membrane assembly, an inner aeration body and an outer aeration body; the two outer aeration bodies are arranged on the two sides of the top end of the lower aeration body respectively, the multiple inner aeration bodies are evenly arranged at the positions, located between the two outer aeration bodies, of the top end of the lower aeration body, the top plate is arranged at the top ends of the two outer aeration bodies and the multiple inner aeration bodies, and the multiple membrane assemblies are evenly arranged between the top plate and the lower aeration body respectively. The inner aeration bodies are separated from one another through a plurality of inner aeration bodies; the inner aeration body and the outer aeration body are arranged in parallel and form an included angle alpha with the X direction of the oxidation ditch; the invention provides a sewage treatment upgrading and reconstruction device and method capable of effectively reducing activated sludge attached to the surface of a membrane and reducing membrane pollution.

The invention relates to the technical field of sewage treatment, in particular to an anti-precipitation oxidation ditch aeration device and an aeration method.The anti-precipitation oxidation ditch aeration device comprises two first aerators, two second aerators and two third aerators, the two first aerators are arranged on the inner sides of the inlet ends of two inner flow guide walls respectively, and the two second aerators are arranged on the inner sides of the inlet ends of the two inner flow guide walls respectively; the sewage at the outlet of the inner flow channel is accelerated and sludge at the bottom of the pool is flushed; the two second aerators are arranged at the inner side ends of the two outer flow guide walls respectively, the two third aerators are arranged on the outer sides of the two inner flow guide walls respectively, and the two second aerators are arranged opposite to the two third aerators respectively and used for aerating sewage to prevent sludge from precipitating; according to the invention, the first aerator with a washing function is arranged in the inner flow channel of the aerobic tank, and the second aerator and the third aerator which are used for preventing precipitation are arranged in the outer flow channel, so that the precipitation prevention effect at the bend of the aerobic tank of the oxidation ditch is effectively improved, and the aeration effect is enhanced.

The application discloses a method for full-load operation of an oxidation ditch system during a sludge expansion period, and the oxidation ditch system comprises a pretreatment zone, an oxidation ditch and a secondary sedimentation tank, and comprises the following steps: opening a water inlet valve of the oxidation ditch, and re-injecting sewage treated by the pretreatment zone; meanwhile, clear water in the upper layer of the oxidation ditch is discharged to the secondary sedimentation tank; the water inlet valve of the oxidation ditch is closed, all pushers in the oxidation ditch are opened, the newly-injected sewage is mixed with the original sludge-water mixture, and the mixture is circulated and flows in the oxidation ditch to perform an anaerobic reaction and release phosphates; then, an aeration system in the oxidation ditch is opened, and the sewage in the oxidation ditch is circulated to perform an aerobic-anoxic working condition; the aeration system and the pushers in the oxidation ditch are closed to perform static sedimentation; and the intermittent operation is repeated. The application controls the expanded sludge in the oxidation ditch, thereby reducing the influence of the expanded sludge on the secondary sedimentation, and enabling the oxidation ditch process to normally produce at full load during the sludge expansion period in winter.

The invention provides a Carrousel oxidation ditch denitrification operation method which comprises the following steps: step S10, mounting positions are preset on the pool wall of a tail end area of an oxidation ditch, two efficient submersible internal reflux pumps are fixed, and the internal reflux pumps are provided with frequency conversion control systems; s20, a traditional surface inverted umbrella aerator is dismantled, distributed aeration discs are installed at the bottom of the oxidation ditch pool according to the matrix type layout, and a magnetic suspension centrifugal blower is arranged in a matched mode to serve as an aeration air source; and step S30, transforming the internal structure of the oxidation ditch pool body, adjusting the space ratio of the anoxic zone to the aerobic zone from the original 2: 3 to 1: 1, prolonging the retention time tA of the anoxic zone to 8.6 h, and synchronously adjusting the retention time tO of the aerobic zone to 8.6 h so as to meet the dynamic requirements of denitrification reaction. According to the technical scheme, the problems that in the prior art, backflow in the Carrousel oxidation ditch cannot be accurately metered, and the fixed proportion of the anoxic section and the aerobic section does not meet the dynamic requirement of the denitrification reaction can be effectively solved.

The utility model discloses an oxidation ditch scum duckweed cleaning device relates to oxidation ditch field, including oxidation ditch body, the upper end of oxidation ditch body all is fixedly connected with the mounting panel, the inboard of mounting panel is provided with the blanking assembly, the inboard of mounting panel is provided with the salvage assembly, the salvage assembly includes the drive motor of setting in the mounting panel outside. The utility model adopts the above -mentioned structure, through starting drive motor makes driving axle stem rotation, and under the rotation of driving axle stem under the action of driving belt makes multiple drive wheel rotation, and under the rotation of drive wheel driving belt rotation makes the filter grid rotation, and the other end of filter grid is connected with the bottom of oxidation ditch body, can be transported to the transmission effect to the big impurity in the oxidation ditch body inside under the effect of salvage grid, and then can conveniently clean the effect of the impurity in the oxidation ditch body inside.

This utility model relates to the field of jet aerators, specifically a Carrousel-type oxidation ditch jet aerator, comprising a jet aerator, a jet aeration head, a seamless steel pipe air inlet pipe, a nozzle, a throat pipe, and a steel structure basket. The jet aerator is connected to and installed with the jet aeration head. The seamless steel pipe air inlet pipe is installed on the upper side of the jet aeration head, the nozzle is installed inside the jet aeration head, and the throat pipe is welded to the side end of the jet aeration head. The jet aerator is installed in the middle of the steel structure basket by a crane. Based on the structure and operating characteristics of the oxidation ditch, the jet aerator solution was selected after extensive research and comparison. The jet aerator uses the negative pressure generated by the high-speed jet to draw in air, and through processes such as mixing, diffusion, and dissolution, transfers oxygen from the air into the water to achieve the purpose of aeration, thereby improving the effect of ammonia nitrogen treatment. The jet aerator has a simple structure, is easy to maintain, is inexpensive, and has the dual effects of aeration and propulsion, which is very suitable for the operating characteristics of oxidation ditches.

The application discloses an oxidation ditch flow state sedimentation method, which is applied to an oxidation ditch flow state and comprises a sedimentation unit and a pushing device, and at least two stages of solid-liquid separators are arranged at intervals in the sedimentation unit; the specific steps are as follows: the oxidation ditch flow state is pushed by using the self-flow velocity of the oxidation ditch flow state or by the pushing device, so that a certain circulation velocity of the oxidation ditch flow state is generated; the sludge liquid with a certain flow velocity is separated layer by layer through the solid-liquid separators in the sedimentation unit, a circulation is formed in the cavity region between adjacent solid-liquid separators, and the particle content of the sludge liquid to the next stage of solid-liquid separator is reduced; the supernatant is discharged through the effluent weir of the sedimentation unit, the organic matter sludge liquid is backflowed to the sedimentation tank through the solid-liquid separator, and solid-liquid separation is realized; the oxidation ditch flow state is originally proposed in the method, and a high-efficiency sedimentation method is provided for the oxidation ditch flow state; compared with the traditional fixed and static sedimentation, the surface load is at least 2 m 3 / ㎡h.

The application discloses a kind of ultraviolet coupling immobilized microorganism reactor and its use.The main structure is quartz column reactor, inside design is ultraviolet lamp quartz sleeve, the column wall of reactor and the ultraviolet lamp quartz sleeve inside form a cavity, which is equipped with the immobilized microorganism material prepared from in-situ effluent of sewage treatment plant and sludge;The top of reactor is movable cover plate, movable cover plate is connected with aeration system, and aeration system is composed of air pump and aeration pipe, and the aeration pipe is connected with the aeration stone at the bottom of reactor.The application uses the activated sludge collected from oxidation ditch of sewage treatment plant to remove typical endocrine disruptor substances, and the removal efficiency is high.

The invention provides an aeration system and an aeration method for sewage treatment, and the aeration system comprises a detection module which is used for detecting water quality parameters of inlet water in an oxidation ditch; the processing module is used for acquiring equipment parameters of the aeration execution mechanism, performing fine adjustment on the equipment parameters according to a plurality of preset constraint conditions, and generating a plurality of candidate equipment parameter sets; the processing module is also used for generating a predicted effluent quality parameter corresponding to each candidate equipment parameter set through a pre-trained prediction model according to the effluent quality parameter and the plurality of candidate equipment parameter sets; the processing module is also used for inputting each candidate equipment parameter set and the corresponding predicted outlet water quality parameter into a preset objective function to obtain a corresponding objective function value; and screening all the candidate equipment parameter sets based on the target function value, taking the screened candidate equipment parameter sets as a control sequence, and controlling an aeration execution mechanism to operate according to the control sequence. According to the invention, refined operation management of the aeration process can be realized.

The invention discloses an oxidation ditch operation observation credibility evaluation method and device, equipment and a medium, and relates to the technical field of oxidation ditch operation monitoring, and the method comprises the steps: collecting an image, carrying out the difference elimination processing to obtain a standardized image, extracting each index to form an image quality feature vector, carrying out the truncation constraint processing of the vector, obtaining a standardized quality vector, and carrying out the observation credibility evaluation of the oxidation ditch operation. Environment disturbance vectors are extracted from the continuous image sequence, smooth disturbance vectors are obtained through time window weighted smoothing processing, and the standardized quality vectors are subjected to weighted fusion based on preset weights to obtain image quality scores; determining an environment modulation factor in combination with the smooth disturbance vector, calculating the observation credibility of the current moment by fusing the image quality score and the environment modulation factor, generating a credibility difference value through time sequence analysis, and obtaining the target observation credibility through an average value and a standard deviation in a sliding window. The efficiency of evaluating the observation credibility of the operation monitoring process of the oxidation ditch is improved.

A method of optimizing a wastewater treatment plant includes: providing an oxidation ditch having a dissolved oxygen set-point and including: an aeration system having an aerobic zone; and an anoxic zone; measuring the oxidation-reduction potential of the anoxic zone; and based on the measured oxidation-reduction potential: increasing or decreasing the dissolved oxygen set-point; increasing or decreasing a dose of supplemental nutrients; and / or increasing a dose of supplemental carbon or metal salts.

The application provides a sewage treatment reconstruction system and method based on an AA0 / oxidation ditch process. The sewage treatment reconstruction system comprises: a first pool body, which is physically separated into a first anoxic zone, an anaerobic zone and an aerobic zone, and the first anoxic zone, the anaerobic zone and the aerobic zone are arranged in sequence and are hydraulically connected; a second pool body, which is spaced from the first pool body, and the second pool body constitutes a second anoxic zone, and the second anoxic zone is hydraulically connected with the aerobic zone and the first anoxic zone respectively; and a separation and precipitation device, which is arranged in the aerobic zone and is used for realizing mud-water separation to obtain clarified water, so that the aerobic zone becomes an aerobic precipitation coupling zone. The sewage treatment reconstruction system provided by the application can solve the problem that system expansion is often difficult to implement under the condition that the site condition is limited.

The invention discloses an oxidation ditch sludge state monitoring method, device and equipment and a medium, and relates to the technical field of computer vision, and the method comprises the following steps: collecting a sludge surface image; performing histogram equalization processing on a sludge area in the image by using an adaptive edge detection algorithm to obtain a to-be-processed image; determining a visual feature vector by using a feature encoder, obtaining a process parameter to generate a parameter coding vector, and carrying out weighted fusion on the parameter coding vector and the visual feature vector to obtain a target feature vector; constructing a historical mode set to determine a deviation index between the target feature vector and a feature vector of a historical stable mode, and determining a process parameter anomaly score between the process parameter and the process parameter baseline; and determining the modal deviation degree based on the deviation degree index and the abnormal score so as to construct a time sequence trend chart and determine the deviation rate change speed of adjacent moments, so that a state monitoring result is determined based on the modal deviation degree, and the efficiency of monitoring the oxidation ditch sludge state is improved.

The utility model provides oxidation ditch sewage treatment equipment with a sludge collection function, which relates to the technical field of sewage treatment and comprises a moving frame arranged on an oxidation ditch, a mounting frame is arranged on one side of the top of the moving frame, a driving roller and a driven roller are arranged on the mounting frame, and a filter screen belt is connected between the driving roller and the driven roller. A dirt suction mechanism is arranged at the top of the moving frame on one side of the mounting frame, a water collecting tank is arranged in the filter screen belt, and a sludge scraping and discharging mechanism is arranged below the output end of the filter screen belt; according to the utility model, the filtering mechanism consisting of the mounting frame, the driving roller, the driven roller and the filter screen belt is arranged at the top of the movable frame on the oxidation ditch, so that sludge can be quickly filtered, and the sludge intercepted on the filter screen belt can be quickly discharged when running to the sludge scraping and discharging mechanism and is synchronously guided out of equipment along with sewage treatment; the operation of equipment is not influenced by the weight of sludge, the energy consumption can be effectively reduced, and the sewage treatment efficiency is improved.

The invention relates to the technical field of sewage treatment, in particular to an anti-precipitation oxidation ditch aeration device and an aeration method.The anti-precipitation oxidation ditch aeration device comprises two first aerators, two second aerators and two third aerators, the two first aerators are arranged at the inner side ends of two drainage walls respectively, the second aerators are arranged at the inner side ends of two drainage walls respectively, and the third aerators are arranged at the inner side ends of two drainage walls respectively. The sewage at the outlet of the inner flow channel is accelerated and sludge at the bottom of the pool is flushed; the two second aerators are arranged at the inner side ends of the two outer flow guide walls respectively, the two third aerators are arranged on the outer sides of the two inner flow guide walls respectively, and the two second aerators are arranged opposite to the two third aerators respectively and used for aerating sewage to prevent sludge from precipitating; according to the invention, the first aerator with a washing function is arranged in the inner flow channel of the aerobic tank, and the second aerator and the third aerator which are used for preventing precipitation are arranged in the outer flow channel, so that the precipitation prevention effect at the bend of the aerobic tank of the oxidation ditch is effectively improved, and the aeration effect is enhanced.

The invention relates to the technical field of sewage treatment, in particular to an MBR sewage treatment device and method.The MBR sewage treatment device comprises a top plate, a bottom plate, a first aeration device, a second aeration device, a third aeration device, a first fixing chain, a fixing frame, an MBR aeration membrane assembly, a lower aeration body and a second fixing chain; the fixing frame is supported at the bottom of the oxidation ditch; the bottom plate is connected below the top plate through a first fixing chain, and the four groups of MBR aeration membrane assemblies are arranged between the top plate and the bottom plate and are respectively and sequentially sleeved on the outer side of the first aeration device, between the first aeration device and the second aeration device, between the second aeration device and the third aeration device and on the inner side of the third aeration device from outside to inside; the lower aeration body is arranged at the bottom of the oxidation ditch, and the top end of the lower aeration body is connected with the bottom end of the bottom plate through a second fixing chain. The MBR sewage treatment device and method can effectively reduce activated sludge attached to the membrane surface.

This invention relates to the field of wastewater treatment technology, and discloses an intelligent control method, system, storage medium, and equipment for blowers in aeration tanks of wastewater treatment plants. It aims to solve the problems of slow response and high energy consumption in traditional manual control, and the poor adaptability, excessive complexity, or insufficient accuracy of existing automatic control systems. This method is based on the flow characteristics and biochemical reaction requirements of a closed-loop circulating corridor aeration tank. It achieves precise automatic regulation of blower airflow through a dual-mechanism coupling of "dynamic DO grading feedback + theoretical airflow quantitative prediction," combined with a seasonally adapted DO control benchmark. The system, through a full-process design of data acquisition, grading calculation, airflow optimization, automatic execution, and closed-loop verification, ensures that dissolved oxygen remains stable within the set range while reducing energy consumption and operation and maintenance costs. This invention is compatible with various processes such as AAO, SBR, oxidation ditch, multi-stage AO, and MBR. It has strong resistance to shock loads, is easy to operate, and has low implementation costs, making it suitable for wastewater treatment plants of all sizes and possessing high promotional value.

The invention discloses a compound oxidation ditch intelligent sewage treatment system which is characterized by comprising a compound oxidation ditch and an intelligent control unit, the composite oxidation ditch is composed of a ditch I, a ditch II and a ditch III, and the three ditch bodies are communicated in pairs through communicating holes. Wherein the ditch I is provided with a water inlet, the ditch III is provided with a water outlet, and the ditch II is provided with a water inlet; the intelligent control unit is composed of an upper computer and a lower computer. A sludge backflow system is additionally arranged between a middle ditch and two side ditches of the oxidation ditch, in the sedimentation stage of the side ditches of the ditch I and the ditch III, the sludge concentration of the middle ditch and the change of inflow water quality are monitored according to sensor indexes, a proper amount of sludge in the side ditches is extracted to flow into the middle ditch, and the sludge backflow amount is adjusted in real time; the sludge concentration of the middle ditch is kept at the optimal sludge concentration required by the aerobic biochemical reaction, so that the microorganisms are in the optimal active state; when a proper amount of sludge in the side ditches is extracted to flow into the middle ditch, the sludge return system in one side ditch is opened, and the sludge return system in the other side ditch is closed.

The invention provides an MABR and MBR effective coupling sewage treatment device and a treatment process, the sewage treatment device sequentially comprises a pretreatment system, an adjusting tank, an MABR tank, a biochemical reaction tank, an MBR tank, a mixed liquid backflow system and a gas supply system, a mixed liquid in the MBR tank flows back to the rear section of the MABR tank through the mixed liquid backflow system, and the gas supply system is used for supplying gas to the MABR tank. And the biochemical reaction tank is one or a combination of more of an aerobic tank, an anoxic tank, a deoxidation tank and an oxidation ditch. According to the invention, the problem of sufficient contact between microorganisms on the MABR membrane and sewage due to MBR high sludge concentration is solved, the influence of MBR high-power flow reflux on the anoxic environment of the MABR system is solved, the reflux quantity of the system is reduced, the nitrogen and carbon removal effects of the MABR are ensured, the influence of drug residues on the MABR biological membrane system in the MBR cleaning process is solved, the stable operation of the system is ensured, and the service life of the system is prolonged. The combination mode of the MABR and the MBR is simplified, and the MABR and the MBR do not correspond to each other in operation and are simple to control.

The invention discloses an oxidation ditch scum fishing device which comprises a flow guide part, the flow guide part comprises a flow guide groove, the flow guide groove comprises an inclined plate and a bottom plate, the bottom of the inclined plate and the bottom plate are sequentially arranged from left to right, an N-shaped frame is fixedly connected to the top of a side plate of the flow guide groove, and a scum guide part is arranged at the bottom of the N-shaped frame and located in the flow guide groove; and the fishing piece comprises a flow guide cover arranged on the bottom plate, the three crushing cavities are formed in the upper surface of the flow guide cover at equal intervals from left to right, and rotatable crushing pieces are arranged in the three crushing cavities correspondingly. According to the oxidation ditch scum fishing device, by arranging the flow guide piece composed of the flow guide groove, the N-shaped frame and the scum guide piece, scum (such as grease, foam and plastic bags) floating on the water surface of an oxidation ditch can be actively guided and gathered to a fishing area, the traditional passive fishing mode is changed, and the initial collection efficiency is improved.

The application provides an aeration system and method for sewage treatment. The aeration system comprises a detection module for detecting water quality parameters in an oxidation ditch; a processing module for obtaining device parameters of an aeration execution mechanism, fine-tuning the device parameters according to a plurality of preset constraint conditions, and generating a plurality of candidate device parameter sets; the processing module is further configured to generate predicted effluent water quality parameters corresponding to each candidate device parameter set according to the water quality parameters and the plurality of candidate device parameter sets through a pre-trained prediction model; the processing module is further configured to input each candidate device parameter set and the corresponding predicted effluent water quality parameters into a preset objective function to obtain a corresponding objective function value; all candidate device parameter sets are screened based on the objective function values, and the screened candidate device parameter sets are used as control sequences to control the operation of the aeration execution mechanism. The application can realize fine operation management of the aeration process.