46 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 utility model discloses an oxidation ditch for sewage treatment, which relates to the field of sewage treatment and comprises an oxidation pond, a water pumping pipe and a water inlet pipe are respectively arranged on two sides of one end of the oxidation pond, mounting sleeves are fixed on two sides of one end of the oxidation pond and in the middle of one side of the oxidation pond, and the water pumping pipe and the water inlet pipe are connected with the mounting sleeves; a filter part is arranged in one side of one end of the oxidation pond, and a biological treatment assembly is arranged at the other end of the oxidation pond and is used for treating sewage in the oxidation pond; a sludge pumping assembly is arranged on one side of the filtering part, is arranged on one side of the oxidation pond and is used for pumping and treating sludge settled in the oxidation pond. According to the sewage treatment device, the filtering piece is arranged in the oxidation pond, and the coarse filtering plate on the filtering piece plays a role in preliminarily filtering sewage, so that large foreign matters in the sewage can be filtered out, and workers can intensively fish out the large foreign matters conveniently.

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 sludge bulking prevention equipment for an oxidation ditch, which belongs to the technical field of oxidation ditch equipment and particularly comprises an oxidation ditch, an aeration component and a clearing component, the removing assembly comprises an alkaline assembly which is arranged below the oxidation groove and is connected with the oxidation groove through a pipeline, and a scraping assembly which swings in the oxidation groove is arranged above the injection end of the alkaline assembly; the aeration assembly comprises a fixing rod which is arranged above the scraping assembly and is in the horizontal transverse direction, the surface of the fixing rod is sleeved with a plurality of fixing rings, the upper ends and the lower ends of the fixing rings are rotationally connected with rotating rods in the direction perpendicular to the fixing rod, and one end of each rotating rod is rotationally connected with a sleeve plate; the rotating end of the sleeve plate is rotatably connected with a push plate, one end of the push plate is fixedly connected with a double-acting air cylinder, and the surface of the rotating rod is rotatably connected with a swing blade. The swing type sludge water body aeration device can swing sludge water body aeration, improve the sludge treatment effect, and meanwhile can alkalify to reduce sludge formation and prevent sludge bulking.

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 discloses an oxidation ditch type energy-saving carbon-reducing efficient denitrification reaction tank and a sewage treatment method. The reaction tank comprises an anaerobic zone, a first anoxic zone, a first aerobic zone, a second aerobic zone and a second anoxic zone; sewage sequentially flows through the anaerobic zone, the first anoxic zone, the first aerobic zone, the second aerobic zone and the second anoxic zone to be treated, and part of nitrification liquid in the first aerobic zone flows back to the first anoxic zone in the treatment process. The existing oxidation ditch type A2 / O process town sewage treatment plant is transformed, the area of the aerobic zone is reduced, and the reduced aerobic zone is transformed into the second aerobic zone and the second anoxic zone which are connected end to end and circularly flow, so that the consumption of excessive carbon sources in the aerobic stage is avoided, the denitrification performance is improved, and the denitrification efficiency is improved. The aeration energy consumption, external carbon source and indirect carbon emission in the town sewage treatment process are reduced, so that the operation cost of a town sewage treatment plant is reduced.

The utility model relates to the technical field of sewage treatment, in particular to oxidation ditch pool surface scum cleaning and collecting equipment which comprises an oxidation ditch pool body with a liquid guide pipe arranged at the middle end of the bottom, and a plurality of supporting sleeves distributed at equal intervals are fixedly connected to the left end of the bottom of the inner side of the oxidation ditch pool body. A rotating rod is movably connected to the middle end of the top of the supporting sleeve through a bearing, guiding sliding grooves are formed in the left side and the right side of the upper end of the rotating rod, a fixing sleeve is slidably connected to the upper end of the outer surface of the rotating rod, and limiting sliding blocks sliding in the guiding sliding grooves are fixedly connected to the left side and the right side of the lower end of an inner cavity of the fixing sleeve. Under the action of the guide vanes, the collecting and deslagging seat, the guide floating disc, the fixed sleeve, the rotating rod and the floating sleeve, the collecting equipment has the advantages of simplicity in cleaning and low use cost, and solves the problems that scum on the pool surface of an existing oxidation ditch is very complicated to clean, the cleaning cost is higher, and inconvenience is brought to manufacturers.

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.

This invention discloses an adaptive control method for micro-aeration oxidation ditches driven by a process simulation model. A process simulation model is constructed using process parameters, and continuous operating data is used for model calibration and verification. Steady-state and dynamic simulations are performed using the process simulation model. The optimal steady-state mode is selected using a nitrogen and phosphorus removal potential index analysis method, and the optimal dynamic mode is selected using an additional reagent cost index analysis method. An adaptive control system is designed, and by setting instrument components, field control components, backtracking time, and scenario boundaries, the optimal operating mode is automatically matched and switched. This safe and efficient adaptive control method can dynamically monitor water quality changes, rationally judge and match the optimal operating mode, and continuously optimize wastewater treatment effects through precise control while ensuring system stability. This not only reduces the need for human intervention but also significantly improves the system's operating efficiency and stability.

The utility model relates to an anti-deformation aerator pipe applied to a large-span oxidation ditch, which comprises a horizontal transverse pipe, reinforcing flat steel is arranged on the horizontal transverse pipe, binding holes are arranged at two ends of the reinforcing flat steel, a connecting pipe is arranged below the horizontal transverse pipe, and a flange plate is arranged at the bottom end of the connecting pipe. The lower part of the connecting pipe is connected with a liftable aerator which is connected with the flange plate; according to the utility model, the horizontal transverse pipe can be applied to a large-span pool without deformation by additionally arranging the reinforcing flat steel, and the horizontal transverse pipe is more stable due to the arrangement of the binding holes.

The utility model relates to a low energy consumption aeration system suitable for oxidation ditch, including fan, main pipeline, oxidation ditch, be equipped with the gas pipeline and aerator on the oxidation ditch, said fan is connected with the main pipeline, the main pipeline is connected with the gas pipeline through the bend pipe, the gas pipeline is connected with the aerator; the aerator is a pipe type aerator capable of being lifted; according to the utility model, the advantage of high dissolved oxygen of the lifting type tubular aerator is utilized, and compared with the traditional aeration device, the air supply of the fan saves energy consumption, so that the power of the fan is reduced, the air supply path is reduced, meanwhile, the maintenance cost of the lifting type tubular aerator is low, and the low-energy-consumption operation of an oxidation ditch sewage plant is ensured.

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.

The utility model relates to the technical field of sewage treatment, in particular to a water treatment device and an oxidation ditch. Comprising a ditch body, an outer side wall and a central guide wall, the outer side wall is arranged outside the ditch body, and the central guide wall is arranged inside the ditch body; the aeration part comprises a rotating shaft and an aeration rotating brush, the two ends of the rotating shaft are matched with the inner wall of the center guide wall and the inner wall of the outer side wall respectively, and the aeration rotating brush is fixedly arranged on the rotating shaft; the protruding pieces are fixedly arranged on the outer side wall and the center guide wall. The side wall of the oxidation ditch is modified, so that the gas content in the oxidation ditch is improved, sediment deposition is avoided, and the treatment performance of the oxidation ditch is improved.

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 utility model discloses an Orbal oxidation ditch aeration system which comprises an outer ditch aeration and data acquisition unit, a middle ditch aeration and data acquisition unit, an inner ditch aeration and data acquisition unit, a dissolved oxygen control unit and a PLC (Programmable Logic Controller) control unit. According to the utility model, the air volume of the magnetic suspension fan and the starting number of the rotating disc aerators in the outer ditch and the inner ditch can be comprehensively calculated and controlled through the data of the water inlet flow meter, the water inlet online detection data and the PLC (programmable logic controller). According to historical data of an oxidation ditch dissolved oxygen meter, a sludge concentration meter, a gas flow meter and other online instruments, the PLC automatically calculates and corrects parameters in a timed mode, the gas supply amount of the magnetic suspension draught fan and the starting number of the rotating disc aerators are adjusted, and the intelligent aeration effect is achieved.

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.

An integrated large-scale metal device for high-intensity wastewater biological treatment, comprising inlet and outlet pipes, wastewater, activated sludge, an aeration oxygen supply apparatus, and a metal housing, thereby forming a tank-shaped wastewater biological treatment system. The metal housing surrounding the tank-shaped wastewater biological treatment system is composed of a hollow double-layer metal formed by two layers of metal plates (1) and core tubes (2) in between. The hollow double-layer metal is formed by hot air copper wire welding and forming of the core tubes (2). An air channel and a flow channel are formed between the inner and outer gaps of the core tubes (2). The activated sludge is formed by combining an oxidation ditch and MBR. The aeration oxygen supply apparatus comprises a fixed rubber aeration tube. The metal housing is made of stainless steel.

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.