63 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.

The utility model belongs to the technical field of sewage treatment, and particularly relates to high-strength integrated large metal equipment for biological sewage treatment, which comprises a water inlet pipe, a water outlet pipe, sewage, activated sludge, an aeration oxygen supply device and a metal shell so as to form a pool-shaped biological sewage treatment system. A metal shell on the periphery of the pool-shaped biological sewage treatment system is composed of hollow double-layer metal composed of two layers of metal plates and a core pipe in the middle, the hollow double-layer metal is formed through hot air copper brazing of the core pipe, and an air channel and a flow channel are formed between the inner gap and the outer gap of the core pipe. The activated sludge is formed by combining an oxidation ditch and an MBR, the aeration oxygen supply device comprises a fixed rubber aeration pipe, and the metal shell is made of a stainless steel material.The device has a heat preservation measure, the sludge activity can be improved, the equipment strength is high, the overall installation efficiency of the equipment is high, rapid splicing is achieved, and the service life of the equipment is prolonged. Compared with other large-scale sewage biological treatment equipment, the cost is lower.

The invention discloses a sewage treatment device with an intelligent phosphorus removal agent adding system, which comprises a phosphorus removal agent adding system, an oxidation ditch structure and a secondary sedimentation tank, and the secondary sedimentation tank is communicated with the oxidation ditch structure; in the whole phosphorus removal agent adding process, the phosphorus removal agent can be automatically added according to the orthophosphate measured value measured by orthophosphate measuring equipment, and in the circulating regulation process, the influence of the initial orthophosphate demand value can be gradually reduced, so that the timeliness in the whole adding system is higher, the adding amount of the phosphorus removal agent is more accurate, and the phosphorus removal efficiency is improved. The orthophosphate index of the effluent of the secondary sedimentation tank is stable and close to the required value, and the dephosphorization effect is better; the stirring structure is arranged to mix water and iron salt on site and prepare the phosphorus removal agent, so that the iron salt content is more stable, the prepared phosphorus removal agent is temporarily stored in the agent temporary storage bin, the spiral shoveling plate is used for continuously mixing bottom liquid and upper liquid, the iron salt content is uniform, and the iron salt content in the added phosphorus removal agent is more accurate.

The invention relates to an induced granulation type oxidation ditch reactor for continuous flow aerobic granular sludge culture and a use method thereof, the induced granulation type oxidation ditch reactor comprises a reaction chamber, the reaction chamber is divided into an aerobic zone and an anoxic zone by a baffle plate, the top of the aerobic zone is connected with a support, a selector is arranged above the support, and the selector is communicated to the bottom of the aerobic zone through a selector water outlet pipe; the bottom of the side wall of one end of the selector is communicated with a sewage inlet pipe, a multi-tank sedimentation tank is arranged on one side in the anoxic zone and communicated with the selector through a gas stripping pipe, a sedimentation tank inlet is formed in one end of the multi-tank sedimentation tank, and a reactor water outlet pipe is arranged at the other end of the multi-tank sedimentation tank; the selector, the multi-tank sedimentation tank and the gas stripping system are integrated, sludge with different particle sizes or sedimentation properties is screened through the multi-tank sedimentation tank, and a sludge-water mixture directionally flows back to different positions in the selector in a gas stripping manner, so that the sludge with small particle sizes or poor sedimentation properties is mixed with high-matrix sewage to strengthen a satiation stage; and the large-particle-size sludge flows back to the low-matrix area, so that particle formation and stable operation of the system are promoted.

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 present invention discloses a biochemical aeration system for an oxidation ditch in a sewage treatment plant, which includes a first aeration pipe group (1) and a second aeration pipe group (2) located in the middle layer of the aerobic zone of the oxidation ditch. A swirl aerator (3) is arranged between the first aeration pipe group (1) and the second aeration pipe group (2); the first aeration pipe group (1) includes two symmetrically distributed first aeration pipes (101), and the first aeration pipes (101) are inclined; the second aeration pipe group (2) includes multiple concentrically arranged annular aeration pipes (201) up and down. An air delivery connecting pipe (202) is arranged between adjacent annular aeration pipes (201), and the diameters of the annular aeration pipes (201) decrease successively from bottom to top. The present invention has the characteristic of being able to effectively improve the overall aeration effect.

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 relates to a facultative anaerobic MSBR sewage treatment method. Raw water enters an anaerobic zone oxidation ditch to be subjected to anaerobic circulation baffling treatment; the sewage treated in the step A enters an oxidation ditch of an anoxic tank through a channel below a partition wall to be subjected to circulating baffling treatment; the sewage treated in the step B enters an oxidation ditch of a facultative tank through a pipeline below the partition wall to be subjected to circulating baffling treatment, and the facultative tank enables part of mixed liquid to flow back to the anoxic tank through a backflow pipe; the sewage treated in the step C enters an SBR pool through a channel below the partition wall to be treated, part of sludge flows back to the anaerobic zone oxidation ditch through a sludge pump, and part of sludge is discharged through a sewage pump; and discharging the clear water treated in the step D from a water outlet of the SBR tank. According to the invention, the nitrogen and phosphorus removal function is enhanced, the conditions that the TN of the effluent of the secondary biochemical pool in conventional sewage treatment is difficult to break through 10mg / L and the TP is difficult to discharge below 0.5 mg / L are overcome, and meanwhile, the requirements of energy conservation, consumption reduction and land conservation are met.

The utility model discloses a liftable aeration system for an oxidation ditch. The liftable aeration system comprises a bottom plate, an outer ditch and an inner ditch, a positioning frame is arranged at the top of the bottom plate, and an anoxic zone is formed in the positioning frame; the outer groove is formed in one side of the positioning frame, and a middle groove is formed in one side of the outer groove; the inner ditch is formed in one side of the outer ditch; according to the utility model, gas flows to the inside of the aeration pipe from the inside of the square head and the joint, and the gas is sprayed out from the surface of the aeration pipe to the inside of the outer ditch and the inside of the inner ditch, so that the aeration inside the outer ditch and the inner ditch is improved; the sealing ring is arranged between the joint and the square head to seal gas, so that the gas is prevented from flowing out from a gap between the joint and the square head; the aeration pipes are arranged in the outer ditch and the inner ditch, gas enters the aeration pipes through the gas inlet pipes, the gas is sprayed out from the interiors of the aeration pipes, aeration is increased, the oxidation rate is increased, the content of dissolved oxygen in water can be increased through aeration, and oxygen needs to be consumed when microorganisms degrade pollutants.

The invention discloses three-dimensional circulating oxidation ditch equipment which solves the problem of unicity of circulating flow of a mixed solution of sewage and activated sludge and improves the sewage treatment effect of different types of microorganisms. According to the technical scheme, the device comprises a shell, a treatment chamber and a settling chamber, the treatment chamber and the settling chamber are both arranged in the shell, and the settling chamber is arranged at one end of the treatment chamber; a shunting layer partition plate is arranged in the treatment chamber and is used for dividing the treatment chamber into an upper-layer channel and a lower-layer channel, an impeller aeration device is arranged at the top of the upper-layer channel, and a plug flow pump is arranged at one end, close to the settling chamber, of the lower-layer channel; a sewage inlet and a stirring shaft are vertically arranged in the middle of the settling chamber, the stirring shaft and the sewage inlet are coaxially arranged, a settling pond is arranged below the stirring shaft, a sludge pump is arranged at the bottom of the settling pond and communicated with the plug flow pump, and a water outlet is further formed in the side wall of the settling chamber.

The utility model relates to the related technical field of sewage treatment, in particular to an intensive oxidation ditch and sedimentation integrated pool which comprises a bottom plate and a pretreatment mechanism, the pretreatment mechanism is arranged on one side of the surface of the bottom plate, and an oxidation and sedimentation mechanism is arranged at one end of the bottom plate. According to the intensive oxidation ditch and sedimentation integrated pool, through the arrangement of the pretreatment mechanism, sewage enters the pretreatment mechanism through a first water inlet, firstly flows into a first box body, passes through a water inlet hopper, and is preliminarily filtered through a first filter frame and a filter screen mounted inside, so that large-particle impurities in water are removed; filtered water is conveyed to a first water pump through a first connecting pipe, the water pump pumps the water to a follow-up treatment unit, tempered glass of the pretreatment mechanism can protect the internal structure, the water flow state is easy to observe, and it is ensured that the filter frames are firmly fixed and convenient to disassemble and clean through the two filter frames and bolts distributed at equal intervals.

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 present invention relates to a device for transforming an oxidation ditch process based on pre-anoxic denitrification and nitrogen removal and a method for using the same, belonging to the field of sewage treatment. The transformation device comprises a pre-anoxic tank, an oxidation ditch, a secondary sedimentation tank and a double reflux system; by transforming the existing primary sedimentation tank into a pre-anoxic tank or newly building a pre-anoxic tank and simultaneously establishing double sludge reflux and two-stage nitrification liquid reflux to form a two-stage anoxic denitrification system, the anoxic residence time is effectively extended, and the full utilization of the raw water carbon source is realized; and by reasonably distributing the carbon source and effectively controlling the two-stage nitrification liquid reflux ratio, the nitrogen removal and phosphorus removal effects of the oxidation ditch process are improved simultaneously.

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 provides an improved oxidation ditch for sewage treatment, which comprises an oxidation ditch, a base, a float sludge collecting mechanism, an aeration tank bottom and an aeration pipe, the base is arranged on one side of the oxidation ditch, and the float sludge collecting mechanism is arranged on the oxidation ditch and the base; the aeration tank bottom is fixedly mounted at the bottom of the oxidation ditch, and the aeration tank bottom is communicated with the aeration pipe fixedly mounted on one side of the oxidation ditch; physical blocking and mechanical pushing are combined, the rectangular horn cover is used for guiding float sludge, the baffle deep into the water surface is used for preventing escape, the spiral rod driven by the waterproof motor efficiently pushes the float sludge to the collecting cover, the float sludge collecting box is stably installed, the float sludge is received and stored through the float sludge valve, automatic, efficient and reliable float sludge collection is achieved, and the water quality is guaranteed. And subsequent treatment and outward transportation are facilitated.