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.