71 results about "Oxygen transfer" patented technology

The invention discloses an enhanced denitrification method and device for a constructed wetland with a high-void-ratio filler, and aims to create favorable conditions for deep nitrification by screening light materials and constructing a high-low-high gradient resistance layer and inducing flow velocity differentiation to form an oxygen concentration fluctuation zone. Function switching type microorganisms with nitrification-denitrification bidirectional conversion capacity are cultured, and a seasonal flora switching mechanism and a complementary symbiotic network are established to adapt to annual temperature change; multi-point distributed water supply is designed to form a river branch type water flow path, and bionic water flow distribution is achieved; the periodic change of the water level of pulsating water inlet is used for driving gas exchange in the filler to form a tidal breathing effect, and deep oxygen supply can be realized without mechanical aeration; and real-time monitoring is carried out based on an intermittent operation time table, and operation parameters are dynamically optimized. According to the invention, the problems of limited oxygen transfer and seasonal performance fluctuation of the traditional constructed wetland are solved, and a technical scheme with low energy consumption and high stability is provided for nitrogen-containing wastewater treatment.

The invention belongs to the technical field of black and odorous water treatment, and particularly relates to a method for repairing and treating rural black and odorous water. According to the invention, aquatic plants, aquatic animals and microbial communities are configured in the system, and hydrodynamic optimization is combined, so that an underwater forest ecological system with self-maintenance capability is constructed, biological self-purification of the black and odorous water body and long-acting stability of the ecological system are realized, and the system is suitable for black and odorous water body treatment of rural rivers and ponds. The ecological balance of a water body is maintained through closed-loop feedback of excessive plankton, enhancement of fish ingestion, promotion of plant growth by excrement and absorption of excessive nutritive salt, meanwhile, oxygen is supplied through photosynthesis of submerged plants, and zero external energy consumption is achieved by combining stepped oxygen transfer without external aeration. In addition, the raw material of the carrier is derived from agricultural wastes, so that the treatment cost is reduced, and the recycling of rural solid wastes can be effectively promoted.

This invention discloses a wastewater treatment bioreactor, primarily relating to the technical field of bioreactors. It includes a reaction tank with an inlet and an outlet at the bottom and top, respectively. An aeration tank is located at the top of the reaction tank, containing several aeration pipes. A biofilm is located at the bottom of the aeration tank. The tops of the aeration pipes pass through the reaction tank and connect to it. An air inlet is located on the aeration tank. A movable frame is vertically slidably connected inside the reaction tank, and several rotating blocks, fitted around the aeration pipes, are rotatably connected to the movable frame. Several first brushes, which cooperate with the aeration pipes, are located on the inner sides of the rotating blocks. The beneficial effects of this invention are: solving the problem of membrane pores being easily clogged, hindering oxygen transfer; improving the oxygen transfer efficiency and aeration effect of the membrane module; improving pollutant removal efficiency; and ensuring the quality of the reactor effluent.

The invention discloses a multistage pretreatment-enhanced biochemical coupled high-fluctuation chemical sewage treatment system, which relates to the technical field of sewage treatment, and comprises a negative pressure monitoring module, a bubble phase analysis module, a bubble blockage identification module, a ventilation control planning module and a reverse ventilation regulation module, a negative pressure change signal is collected at a water inlet end of the sewage treatment system, a synchronous change curve of a gas flow signal and a liquid flow signal is extracted, a complete operation time chain is formed according to an operation time sequence, and a negative pressure characteristic curve is generated according to the operation time chain to establish a pressure fluctuation monitoring reference. Real-time regulation and control of gas-liquid flow are achieved through negative pressure monitoring and bubble phase analysis, and oxygen transfer stability and dissolved oxygen balance are improved; through bubble blockage identification, ventilation control planning and reverse ventilation adjustment, the gas flow direction and the exhaust rhythm are optimized, blockage and pressure accumulation are prevented, and continuous and stable operation of the high-fluctuation sewage treatment process is ensured.

The utility model discloses a low-energy-consumption and low-carbon-nitrogen-ratio sewage treatment device based on an MABR, and relates to the technical field of sewage treatment devices, in particular to the low-energy-consumption and low-carbon-nitrogen-ratio sewage treatment device based on the MABR, which is arranged on a foundation ground with a certain gradient. Comprising an anaerobic tank, an MABR membrane tank, an aerobic tank, a sedimentation tank and a disinfection tank which are formed by pouring building components, the oxygen transfer efficiency is improved through the MABR membrane assembly in the MABR membrane tank, the improvement of the oxygen transfer efficiency can effectively reduce the energy consumption, simultaneous nitrification and denitrification is realized, and ammonia nitrogen and total nitrogen in water are effectively removed; the aerobic tank is aerated through the aeration assembly, dissolved oxygen in water is increased, and metabolism of aerobic microorganisms is promoted, so that decomposition of organic matters is accelerated, and the nitrification effect is enhanced. According to the technical scheme, the MABR process and other sewage treatment processes are effectively combined, the sewage treatment effects of low energy consumption and low carbon nitrogen ratio are achieved, and compared with the prior art, the overall structure is simple, and the sewage treatment process is simple, convenient and efficient.

The application discloses an aeration dynamic balance digital control method and system for coping with flow state distortion, relates to the technical field of sewage treatment, and comprises the following steps: constructing a sewage treatment aerobic tank multi-point dissolved oxygen and flow state synchronous monitoring system, continuously collecting spatial distribution data of dissolved oxygen, water flow velocity and density in the tank, and generating a flow state distribution graph reflecting the flow state distribution characteristics in the tank; based on the flow state distribution graph, the collected water flow velocity gradient and dissolved oxygen difference are subjected to collaborative feature extraction, and an abnormal area with flow state distortion is identified. Through multi-point monitoring and dynamic weighted control, the application realizes real-time identification of the flow state of the aerobic tank and accurate regulation of the air quantity, maintains the balance of the dissolved oxygen distribution, improves the oxygen transfer efficiency and the operation stability; by introducing a fluid correction factor and a time sequence prediction model, a control closed loop with self-learning and energy-saving optimization capabilities is established, and the intelligence and economy of the aeration process are improved.

The present application relates to a kind of circadian rhythm-based circulating water aquaculture fish pond dissolved oxygen mechanism modeling method, including the influence of fish respiration consumption, water surface atmospheric reoxygenation, circulating water flow, mechanical aeration factor on dissolved oxygen dynamic change;According to oxygen transfer equation, considering the influence of the above four factors on fish pond dissolved oxygen, the dissolved oxygen mechanism model of circulating water aquaculture fish pond is established;Combined with oxygen transfer equation and the characteristics of fish respiratory activity changes between day and night, the influence of fish respiratory circadian rhythm on the model is analyzed, and the model is verified.The present application can more accurately reflect the high and low peak value in different time periods and also capture the dynamic changes presented in the whole cycle, and effectively avoid the loss and risk caused by the inaccurate model description to the aquaculture industry in extreme breeding environment or abnormal environment.

The present invention provides an efficient submersible aeration method, which includes the following steps: Step 10) Install the submersible aerator into the water body; Step 20) Start the submersible aerator, and the first impeller forms a negative pressure in the mixing chamber of the mixing disk, so that the air on the water surface enters the mixing chamber and mixes with the water to form the first-generation steam-water mixture, realizing the first aeration; Step 30) The steam-water mixture is tangentially ejected from each flow channel of the mixing disk around the axis of the submersible motor pump, and is circumferentially injected into the water body on the vertical plane perpendicular to the axis of the submersible motor pump, continuously mixes with the water body, and integrates the air in the steam-water mixture into the surrounding water body to realize oxygen transfer; The steam-water mixture ejected from each flow channel oxygenates the water body in the depth direction; The flow fields generated after the steam-water mixtures ejected from different flow channels enter the water body interact with each other and integrate. The present invention provides an efficient submersible aeration method, which enables the dissolved oxygen effects at the bottom, middle and upper parts of the water body to be evenly distributed and increases the dissolved oxygen efficiency.

The application provides an industrial wastewater denitrification pollution treatment equipment operation state intelligent monitoring system, and belongs to the technical field of wastewater denitrification pollution treatment. The industrial wastewater denitrification pollution treatment equipment operation state intelligent monitoring system is characterized in that it comprises a dissolved oxygen collection module, which collects dissolved oxygen concentration data of each spatial sampling point in real time; an oxygen spectrum generation and identification module, which is used for mapping the dissolved oxygen concentration data to a three-dimensional spatial coordinate system corresponding to a target nitrification tank, and constructing an oxygen spatial distribution spectrum of the target nitrification tank; an analysis and calculation module, which constructs an oxygen demand load factor; and a comprehensive analysis module, which is used for correlating the oxygen consumption factor and the oxygen demand load factor, constructing an oxygen transfer efficiency factor, and performing evaluation and optimization. Through layering of the water body and adjustment of the Roots blower air supply, precise oxygen supply is realized, and energy waste and denitrification efficiency reduction caused by excess or insufficient oxygen are avoided.

The application relates to a sewage aeration energy-saving control method based on oxygen transfer efficiency coupling constant DO, and relates to the field of sewage treatment. The method comprises the following steps: carrying out multi-factor clean water aeration test, fitting the relationship between the aeration quantity Q A and the oxygen transfer efficiency OTE, constructing a basic OTE control algorithm; collecting basic data of a sewage aeration system, optimizing and formulating a targeted OTE control curve, and embedding a reasonable dissolved oxygen DO range to couple a constant DO control strategy; determining the aeration quantity Q A_OTE based on the OTE control curve, and comparing the energy-saving benefits with the aeration quantity Q A_DO under the constant DO control strategy; and adjusting the aeration fan power consumption and the aeration pipeline flow distribution by selecting the optimal Q A . The method couples the constant DO control strategy by formulating the OTE control curve, controls the aeration quantity Q A in a reasonable range, and achieves the stable and energy-saving targets.

The present application belongs to the technical field of black and odorous water treatment, and particularly relates to a method for repairing and treating black and odorous water in rural areas. The present application configures aquatic plants, aquatic animals and microbial communities through a system, combines with water power optimization, and constructs an underwater forest ecological system with self-maintenance capability, so as to realize biological self-purification and long-term stability of the ecological system of the black and odorous water, and is suitable for the treatment of black and odorous water in rural rivers and ponds. Through the closed-loop feedback of excess plankton -> enhanced fish feeding -> excrement promoting plant growth -> absorbing excess nutrients, the ecological balance of the water body is maintained, and the oxygen supply of the photosynthesis of submerged plants is combined with the step-by-step oxygen transfer, so that external aeration is not needed, and zero external energy consumption is realized. In addition, the carrier raw material of the present application is derived from agricultural waste, which reduces the treatment cost and effectively promotes the resource utilization of rural solid waste.

The invention provides an aeration method based on an efficient submersible jet aerator, which comprises the following steps: step 10, a water pump operates, and generated fluid flows into a first nozzle; step 20, the fluid flows in the first nozzle, the speed is gradually increased, most of the fluid is sprayed into the mixing chamber through an outlet of the first nozzle, and a small part of the fluid is sprayed into the mixing chamber through the first aeration hole group; negative pressure is formed in the mixing chamber, and air above the liquid level is sucked into the mixing chamber through the air inlet pipe and is mixed with the fluid to form steam-water mixed liquid; 30, the steam-water mixed liquid in the mixing chamber flows into a second nozzle; 40, the steam-water mixed liquid flows in a second nozzle, the speed is gradually increased, and the steam-water mixed liquid is sprayed into a throat pipe through an outlet of the second nozzle; and step 50, enabling the steam-water mixed liquid in the throat pipe to flow into a water body through a diffusion pipe, and carrying out an oxygen transfer process. According to the aeration method based on the efficient submersible jet aerator, the amount of aeration entering the mixing chamber can be increased, and the oxygen dissolving efficiency is improved.

The invention discloses an excrement sampling and collecting device, belongs to the technical field of excrement sampling devices, and aims to solve the problems that a sample is easy to contact and react with air from sampling to transferring, the accuracy of a subsequent detection result is influenced, and a sampling part and a collecting part cannot be isolated from oxygen when multiple and massive sampling is carried out. The device comprises a collection tank and a mounting seat fixed to the middle of the upper portion of the collection tank, a mounting sleeve is mounted in the mounting seat, and a sampling mechanism is slidably arranged in the middle of the inner side of the mounting sleeve. According to the invention, the movable pinch-off mechanism is arranged on the sampling mechanism, so that the excessive adhesion part during extraction of the sampling mechanism can be moved and pinched off, the possibility of adhesion is avoided, when the sampling mechanism is subsequently transferred, the possibility of dripping and contact with air of a sample remained in an interlayer on the innermost side of the sampling mechanism is avoided, and anaerobic transfer can be realized, so that the accuracy during sample detection is ensured.

To provide a method for producing aspartic acid that enables improvement of the yield of aspartic acid in microbial production of aspartic acid.SOLUTION: A method for producing aspartic acid includes a step of generating aspartic acid by reacting an aspartic acid raw material with an aspartic acid-producing microorganism in a reaction liquid housed in a reaction vessel which allows control of an aeration rate and a stirring speed. The aeration rate and the stirring speed during the reaction are controlled so as to satisfy the following condition (i) and at least one of the following conditions (ii) and (iii): (i) the oxygen transfer capacity coefficient (kLa) is in the range of 30 / h to 60 / h; (ii) the agitation power per unit volume without aeration (P / V) is less than 2 kg m2 s-3; (iii) the aeration rate per unit volume is 0.2 vvm or more.SELECTED DRAWING: None

The utility model discloses a kind of gradient porosity MABR membrane silk assembly structures, including tube sheet, the bottom of the tube sheet is fixedly installed with hydrophobic layer, the inner wall of the hydrophobic layer is fixedly attached with vertical support layer, the hydrophobic layer and vertical support layer are all perforated with air hole, the inside of the vertical support layer is perforated with through hole, the diameter of the straight hole of the one end of tube sheet close to through hole is larger by being set, the one end of tube sheet is gas inlet end, so the gas pressure of the one end of tube sheet close is smaller, the diameter of the through hole of far away gas inlet end is smaller, so the passage cross-sectional area of the one end of tube sheet close is reduced, gas compression leads to gas pressure greater than gas inlet end, so the oxygen content dissolved into external water in unit time will rise, compensate terminal biofilm due to biofilm thickening leads to dissolved oxygen content low Problem, the air hole density of gas outlet end is larger, enhance the oxygen diffusion capacity of terminal, compensate oxygen transfer attenuation due to biofilm thickening, avoid terminal anoxia, promote outer layer denitrifying bacteria enrichment.

The invention discloses fermentation equipment, and a preparation production line and a production process of in-vitro cultured calculus bovis, and relates to the field of fermentation equipment. According to the invention, the fermentation tank is provided with the biological detection analyzer capable of detecting the number and the state of the strains in the fermentation tank, and the oxygen supply amount of the oxygen inlet pipe to the fermentation tank can be adjusted according to the detected number and the state of the strains in the fermentation tank, so that the oxygen supply amount in the fermentation tank is always in a suitable range; the influence on the fermentation efficiency and the product quality due to the damage to microbial metabolic balance caused by excessive or insufficient oxygen supply is prevented; fermentation liquid is stirred through the stirring assembly, the gas-liquid contact area is increased, the oxygen transfer rate is increased, and the gas guide assembly and the gas distribution assembly which are communicated with the oxygen inlet pipe are arranged in the stirring assembly, so that when the stirring assembly rotates and stirs in the fermentation tank, the oxygen transfer rate is increased; oxygen conveyed by the oxygen inlet pipe can be uniformly distributed and conveyed into the fermentation tank through the gas guide assembly and the gas distribution assembly, so that the mixing uniformity of fermentation liquor and oxygen is improved.

The invention relates to the field of coal-bed gas well drainage and mining, in particular to a biological protease fermentation device which comprises a rotatable fermentation tank, and a mixing module capable of evenly stirring fermentation materials is fixedly arranged in the middle of the interior of the fermentation tank. A tearing module matched with the mixing module to scatter internal deposits is fixedly arranged in the fermentation tank, and a plurality of crushing modules capable of crushing large fermented materials are fixedly arranged on the inner wall of the fermentation tank. Through cooperation with oxygen transmission, growth of microorganisms and synthesis of enzymes are promoted, dead corners in the fermentation tank are reduced, the problem of poor local fermentation is avoided, internal deposits can be scattered, the fermentation materials are prevented from being accumulated at the bottom or on the wall of the tank, uniform distribution of the fermentation materials is ensured, and the fermentation efficiency is improved. Meanwhile, large-sized fermented materials can be effectively filtered and crushed, large particles are prevented from blocking or influencing the fermentation efficiency, and all the fermented materials can be ensured to be in full contact with a culture medium.

The application discloses a system and method for preparing CO gas by CO2 carbon-free deoxidation, a steelmaking induction furnace is transformed into a closed gas making furnace, CO2 or industrial tail gas containing high concentration CO2 is taken as raw gas and is introduced into an oxygen-saturated iron-based melt at 1600-1800 DEG C through a bottom blowing element, high concentration CO gas is prepared, FeO deoxidation product of CO2 is migrated to a slag phase and oxygen removal and iron reduction regeneration are realized through an external electric field mode, a new method for preparing CO by CO2 carbon-free deoxidation is constructed with the oxygen-saturated iron-based melt solute iron element as an oxygen transfer medium, meanwhile, the energy required by CO2 decomposition endothermic and molten slag electrochemical reduction can be generated through photovoltaic, wind, hydraulic or nuclear power generation devices, green electricity is used as an energy carrier to realize efficient quality-energy conversion of CO2 and CO under the condition of no additional carbon input, a carbon neutral cycle process of steel-chemical cogeneration coupling is opened up, and the application has good application and development prospect.

The invention provides a BioWin-based MABR aeration control system and a BioWin-based MABR aeration control method. A set of control method suitable for the MABR aeration system is established, water quality indexes and operation parameters which are measured in real time are input into BioWin software, theoretical oxygen demand and actual oxygen transfer rate are obtained through calculation by using a BW controller, regulation and control quantity is obtained through PID control calculation, regulation and control signals are transmitted to a PLC system by the BW controller, and the PLC system is used for controlling the aeration of the MABR aeration system. And the PLC system regulates and controls the regulating valve and the aeration fan and receives a feedback signal, so that accurate control on the aeration system is finally realized. The system has the advantages that real-time data are input into the BW controller through online monitored water quality indexes and operating parameters, theoretical oxygen demand and actual oxygen transfer rate are obtained through calculation, and the aeration air volume is optimized, the denitrification efficiency is improved and the aeration energy consumption is reduced through PID (Proportion Integration Differentiation) control; water quality indexes and operation parameters are changed, the variation trend of theoretical oxygen demand and actual oxygen transfer rate is predicted, the aeration air volume is regulated and controlled, and air volume waste is reduced.

This application relates to a monitoring method, apparatus, computer equipment, and storage medium for fermentation equipment. The method includes: monitoring the current stirring speed and current aeration rate of the fermentation equipment; determining the target oxygen transfer rate per unit volume for the fermentation equipment based on the current stirring speed and current aeration rate; and displaying the current stirring speed, current aeration rate, and the corresponding target oxygen transfer rate per unit volume on the fermentation equipment, wherein the target oxygen transfer rate per unit volume reflects the current fermentation efficiency and quality of the fermentation equipment. Using this method, the fermentation efficiency and quality of the fermentation equipment can be accurately reflected through the target oxygen transfer rate per unit volume.

The invention discloses an energy-saving control method and system for a sewage treatment aeration system based on working condition adaptation, and relates to the technical field of sewage treatment energy conservation. According to the method, through full-process substance trajectory analysis, operating environments are divided into four types of high-temperature sunny days, high-temperature rainy days, low-temperature sunny days and low-temperature rainy days, and COD removal rates of all sections of a biochemical pool under different working conditions are quantified; a theoretical oxygen demand dynamic calculation model is constructed based on the principle of conservation of substances, and the actual oxygenation amount is monitored in real time in combination with an intelligent aeration monitor; a staged aeration optimization strategy is adopted, and the aeration rate is adjusted in sequence, so that DO is maintained at 1.0-2.0 mg / L; and energy-saving effect quantification and feedback adjustment are realized by monitoring indexes in real time. The device comprises an intelligent monitoring module, a working condition adaptation calculation module, a subsection control execution module and a data feedback module. The method solves the problems of poor working condition adaptability, extensive calculation of oxygen transfer efficiency and the like of a traditional method, and realizes accurate energy saving of an aeration system and stable and standard water quality.

The invention relates to the technical field of sewage treatment, and discloses sewage treatment equipment based on an MPF process and a control system thereof, the sewage treatment equipment comprises a tank body, a filter layer arranged in the tank body and used for filtering sewage, and a filler mechanism arranged in the tank body and used for removing sewage pollutants, and the aerator is arranged on the outer wall of the tank body and is used for aerating the filling mechanism. According to the sewage treatment equipment based on the MPF process, organic matters in sewage are metabolized through the MPF filler body and are converted into harmless substances, and the sewage is aerated by using the aerator, so that the organic matters in the sewage can be oxidized and decomposed into harmless substances such as carbon dioxide and water, and the sewage treatment efficiency is improved. And through the arrangement, the direct and uniform aeration of the MPF filler body is realized, the oxygen transmission efficiency is greatly improved, and sufficient oxygen supply for microbial communities is ensured, so that the degradation process of organic pollutants is accelerated, and the sewage treatment efficiency is remarkably improved.

Provided is an ozone supply device comprising: a plurality of ozone generators (3a, 3b, 3c) that generate ozone from supplied oxygen; adsorption devices (41a, 41b) that are provided in a smaller number than the total number of the ozone generators (3a, 3b, 3c) and that separate, from a mixed gas that is supplied from the ozone generators (3a, 3b, 3c) and that is composed of oxygen and ozone, oxygen contained in the mixed gas by adsorbing ozone; oxygen transfer devices (42) that are provided in a smaller number than the total number of the ozone generators (3a, 3b, 3c) and that transfer oxygen separated from the mixed gas by the adsorption devices (41a, 41b) to the ozone generators (3a, 3b, 3c); first shared piping (10a) for connecting, in a shared manner, the outlet side of the oxygen transfer devices (42) and the inlet side of the ozone generators; and second shared piping (10b) for connecting, in a shared manner, the inlet side of the adsorption devices (41a, 41b) and the outlet side of the ozone generators.

To provide an ozone supply device improved in energy saving, and an operation method of the ozone supply device.SOLUTION: A plurality of ozone generators (3a, 3b, 3c) configured to generate ozone from the supplied ozone; the ozone is supplied from the ozone generators (3a, 3b, 3c); An adsorption unit (41a, 41b) configured to adsorb ozone from a gas mixture composed of air and ozone to separate air from the gas mixture, an air transfer unit (42) configured to transfer air separated from the gas mixture by the adsorption unit (41a, 41b) to an ozone generator (3a, 3b, 3c), and a first common pipe (10a) configured to commonly connect an outlet side of the air transfer unit (42) and an inlet side of the ozone generator; And a second common pipe (41a) commonly connecting an inlet side of the adsorption device (10b, 41b) and an outlet side of the ozone generator.SELECTED DRAWING: Figure 2

The utility model discloses a combined stirring device for sewage treatment. The combined stirring device comprises an assembling bracket, a driving motor, a stirring rotating shaft and an air supply device, the driving motor is in transmission connection with the stirring rotating shaft, and the stirring rotating shaft is connected with the stirring assembly, provided with the aeration assembly and connected with the air supply device. And the bottom end of the rotating shaft is connected with the base. The stirring assembly comprises a first transverse connecting part, a second transverse connecting part and a vertical stirring rod, and an aeration pipe of the aeration assembly is arranged on the second vertical stirring rod and is connected with an air supply disc and an air supply device through an air supply connecting hose and a rotary air supply structure. The second transverse connecting part is provided with a telescopic rod piece and a driving structure. And a guide plate is arranged at the bottom end of the rotating shaft. The device adopts the combination of fixed and adjustable movable stirring structures and the ingenious arrangement of the aeration pipe, realizes the synchronization of stirring and aeration, overcomes the problems of stirring dead angles, low efficiency, poor aeration and the like of the existing stirring device, improves the efficiency and quality of oxygen transfer and sewage treatment of the aerobic reaction tank, and has remarkable technical and application values.

A modular hyperbaric chamber system with a reversible control section is disclosed, providing enhanced flexibility in chamber placement and orientation within various spatial constraints. The system includes a modular cylindrical vessel composed of a cylindrical body section, a head section, and a door section, with the body section featuring a reversible control section. This reversible control section, equipped with mirrored control inlets and windows, allows for 180-degree rotation, altering the chamber's orientation. The chamber maintains an internal pressure of at least 3 atmospheres and includes a flow control system for oxygen transfer from an external source into the chamber. A control panel with a housing and multiple controls is operably connected to the flow control system and can be secured to either the interior or exterior mirrored control inlets. The system's design accommodates custom configurations and ensures patient and operator convenience and safety.

The invention discloses an efficient cyclone aeration energy-saving treatment system for pulping and papermaking wastewater. The efficient cyclone aeration energy-saving treatment system comprises an aeration tank, array aerators, an oxidation decoloration tank, a first anti-corrosion air supply manifold, a high-pressure air supply nozzle and an activated carbon filter layer, a tank cavity is formed in the aeration tank, array aerators are uniformly arranged on the inner surface of the bottom in the tank cavity, and a discharge port is formed in the inner wall of one side of the upper end of the tank cavity; modular design is adopted, deep purification and stable operation of pulping and papermaking wastewater are achieved through system overall structure optimization and core assembly collaborative design, aerators arranged in the aeration tank in an array mode can form a spiral ascending flow state and a bottom negative pressure entrainment effect on the basis of the fluid dynamics principle, and the aeration effect is improved. The particle size of bubbles is effectively refined, the gas-liquid contact time is prolonged, the oxygen transfer efficiency is greatly improved, and the uniform distribution of dissolved oxygen in the tank can be ensured through the distributed layout of multiple groups of anti-corrosion gas supply manifolds and high-pressure gas supply nozzles in the oxidation decoloration tank.

The invention discloses a power distribution network voltage collaborative optimization method considering the load of an oxygen pumping machine, and the method comprises the steps: 1, building a reference model of the active power of the load of the oxygen pumping machine, and building a dynamic correction model of the active power of the load of the oxygen pumping machine by considering the influence of water temperature and water depth; 2, establishing a dissolved oxygen kinetic model, a relationship between the mechanical oxygenation rate of the load of the oxygenator and the standard oxygen transfer rate, and a dissolved oxygen concentration safety constraint; 3, establishing a power flow model of the power distribution network; 4, establishing an oxygen pumping machine control-water quality dynamic-power grid voltage cooperative control model and a target function; and 5, solving the cooperative control model to obtain node voltage and photovoltaic output which enable the dissolved oxygen concentration of the aquaculture pond to be maintained in a safe range. According to the method, the collaborative model containing the load of the oxygen pumping machine can be constructed, so that accurate control and optimal scheduling of the power distribution network-aquaculture pond system are realized.

The application relates to the technical field of sewage treatment, and discloses sewage treatment equipment based on an MPF process and a control system thereof, which comprises a tank body, a filter layer arranged in the tank body and used for filtering sewage, a filler mechanism arranged in the tank body and used for removing sewage pollutants, and an aerator arranged on the outer wall of the tank body and used for aerating the filler mechanism. The sewage treatment equipment based on the MPF process metabolizes organic matters in sewage through an MPF filler body, and converts the organic matters into harmless substances; meanwhile, the aerator is used for aerating the sewage, so that the organic matters in the sewage can be oxidized and decomposed into harmless substances such as carbon dioxide and water; the direct and uniform aeration of the MPF filler body is realized through the arrangement, the oxygen transfer efficiency is greatly improved, sufficient oxygen supply is ensured for the microbial community, the degradation process of the organic pollutants is accelerated, and the sewage treatment efficiency is remarkably improved.

The invention relates to the field of drinking water purification, in particular to a nanobubble liquid preparation device. A first cavity and a second cavity which are communicated through a communication opening are formed in a shell of the device, a movable assembly is connected with a cutting assembly, and the movable assembly tends to push the cutting assembly under the elastic effect of the movable assembly; the cutting assembly is made to abut against the communicating opening and seal the communicating opening; the gas-water mixture in the first cavity is accumulated in the first cavity, so that the first cavity forms a pressure difference relative to the second cavity and extrudes the movable assembly; and the movable assembly can be pushed when the pressure difference exceeds a threshold value so as to drive the cutting assembly to move and open the communicating opening, so that the gas-water mixture is injected into the second cavity, and at least part of the gas-water mixture is cut into nano bubble liquid. Compared with the prior art, the device is compact in structure and lower in energy consumption, stable and continuous production is achieved through cooperation of the cutting assembly and the movable assembly, and the device is particularly suitable for drinking water purification, sewage treatment and other scenes needing efficient oxygen transfer.