138 results about "Aeration rate" patented technology

The invention discloses a method for realizing high-efficiency low-consumption micro-aerobic hydrolytic acidification of petrochemical wastewater by regulating and controlling the aeration rate in combination with a space-time diagram neural network and reinforced learning, and relates to a method for realizing high-efficiency low-consumption micro-aerobic hydrolytic acidification of petrochemical wastewater by regulating and controlling the aeration rate. The method comprises the following steps of: 1, collecting and cleaning data; 2, constructing a graph data set; 3, training the ST-GNN model; 4, constructing a deep Q reinforcement learning model; 5, the trained ST-GNN model is embedded into an automatic control system of a sewage treatment plant, and the model outputs the optimal aeration rate of the current time step and predicts the micro-aerobic hydrolytic acidification effect through interaction of the current working condition and historical data; and adjusting operation parameters of aeration equipment according to the output of the model, and carrying out hydrolytic acidification treatment. The method is high in regulation and control efficiency and low in operation error, and can be applied to the field of digital and intelligent management of sewage treatment plants.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment control process based on dynamic regulation and control of aeration and carbon source addition, which comprises the following steps: acquiring microbial metabolism heat change data in real time; biochemical treatment: monitoring the dielectric constant of a water body and the Reynolds number of sewage flow in real time, and constructing a multi-parameter coupling regulation and control model and dynamically regulating and controlling the aeration rate in combination with microbial metabolism heat change data obtained in the pretreatment step; accurately adding the carbon source according to a calculation result of the carbon source demand prediction model; sewage subjected to biochemical treatment is subjected to ultrafiltration through a nanofiber membrane and then subjected to combined disinfection treatment through ultraviolet rays and ozone, treatment parameters are regulated and controlled in real time according to the membrane flux attenuation trend in the treatment process, and dynamic and accurate control over sewage treatment is achieved. According to the method, the problem of energy consumption waste caused by excessive aeration or low degradation efficiency caused by insufficient aeration in a traditional process is solved, and accurate matching of dissolved oxygen supply and microbial requirements is realized.

The embodiment of the invention relates to electrochemical enhanced biological integrated intelligent regulation and control equipment for treating organic wastewater. The electrochemical enhanced biological integrated intelligent regulation and control equipment comprises an electrochemical enhanced biodegradation module and an intelligent control system, the electrochemical enhanced biodegradation module comprises a porous membrane electrode assembly, a power supply control system, an electrolyte adding system, a fixed bed biological membrane, an aeration system and a carbon source adding system; the intelligent control system comprises a data acquisition and remote monitoring module and a PLC (Programmable Logic Controller); the data acquisition and remote monitoring module acquires parameters such as COD (Chemical Oxygen Demand), dissolved oxygen concentration, ammonia nitrogen, total nitrogen and conductivity of the electrochemical enhanced biodegradation module and transmits the parameters to the PLC; and the PLC receives the parameters, and automatically adjusts one or more of voltage, current density, aeration rate and carbon source dosage based on a preset model established by a support vector regression and neural network machine learning algorithm. The intelligent regulation and control equipment can keep an optimal treatment state under different wastewater characteristics and load conditions, and has strong adaptability to environment or load fluctuation.

The invention relates to a continuous flow AOA whole-course anaerobic ammonia oxidation self-enrichment enhanced denitrification system and method, and the system comprises a front anoxic tank, an aerobic tank and a rear anoxic tank which are connected in series, and is filled with a biological filler; the monitoring aeration device comprises an ammonia nitrogen detector and an aeration unit which are connected with the aerobic tank; the reflux device is used for communicating a reflux outlet of the rear anoxic tank with water distribution of the front anoxic tank; and the PID control unit is connected with the monitoring aeration device, the backwashing control valve and the reflux device. The method comprises the following steps: sewage flows into the front anoxic tank, the aerobic tank and the rear anoxic tank; regulating and controlling the reflux ratio to domesticate the biological membrane of the aerobic tank; the ammonia nitrogen concentration of effluent of the aerobic tank is detected in real time through an ammonia nitrogen detector, and the PI D control unit dynamically adjusts the aeration rate of the aerobic tank according to the ammonia nitrogen concentration value and a preset target value, so that the aerobic tank and the rear anoxic tank form an anaerobic ammonium oxidation bacteria self-enrichment environment; the backflow device is used for enabling effluent of the rear anoxic tank to flow back to the front anoxic tank according to a preset proportion, so as to form a whole-process anaerobic ammonia oxidation self-enrichment environment.

The invention relates to the technical field of sewage treatment, in particular to an aeration device for sewage treatment, which comprises an aerator, an adjusting unit for adjusting the aeration rate according to the water quantity, and a treatment unit for cleaning and collecting scum on the water surface, the adjusting unit comprises an outer pipe for supplying air to the aeration machine, an inner pipe and an air inlet piece for controlling the inner pipe to supply air to the outer pipe. According to the invention, through the arrangement of the lower floating plate, the upper floating plate and the connecting floating plate, the inner pipe is driven to adjust the height, the situation that when the water level is relatively low, the air inlet pipe of the aerator is exposed and shakes under the influence of wind power in strong wind weather to cause damage is avoided, and meanwhile, the aeration rate of the aerator can be naturally adjusted according to the water quantity without manual adjustment, so that the aerator is more convenient; as the lower floating plate, the upper floating plate and the connecting floating plate float on the water surface, scum on the water surface can be collected and treated, meanwhile, leaves blown to the water surface in strong wind weather can be collected and treated, and the use effect is good.

The invention relates to the technical field of aeration rate control systems, and discloses an intelligent aeration rate control system and an aeration rate control method, and the system comprises a sensor module, a data acquisition module, a control module, an adjustment module and a display module. The sensor module is connected with the data acquisition module, the data acquisition module is connected with the control module, the control module is connected with the adjusting module, and the adjusting module is connected with the display module; an algorithm unit of the control module is combined with a control algorithm and an energy-saving optimization algorithm, intelligent calculation and decision can be carried out according to real-time monitoring data and preset parameters, the aeration rate can be automatically adjusted to adapt to aeration requirements under different water quality and flow conditions, frequent manual intervention is not needed, and the aeration efficiency is improved. The automation level and the intelligent degree of the system are improved, and the display module displays the operation state and the monitoring data of the system in real time, so that an operator can visually know the working condition of the system, discover abnormal conditions in time and take corresponding measures.

The invention provides a sewage treatment aeration control method and system based on a deviation compensation hybrid model, and relates to the technical field of intelligent optimization control of a sewage treatment process, a mechanism model driving layer in the hybrid model outputs a benchmark predicted value of effluent quality, and a process deviation compensation layer performs uncertain quantitative estimation on the benchmark predicted value, so that an aeration control result is obtained. Performing process deviation compensation on the reference predicted value; establishing an aeration optimization objective function by taking the minimum aeration rate as an optimization objective, solving to obtain the optimal aeration rate, outputting a control signal to an air blower according to the optimal aeration rate so as to adjust the rotating speed of the air blower or the opening degree of a valve, change the air supply rate to a reaction tank, and simultaneously, collecting inlet water quality data and operation parameters of an aeration system in real time; and updating the optimal aeration rate, and updating the control signal to form a feedback closed loop. Highly intelligent, stable, reliable, energy-saving and efficient aeration control can be realized, and the sewage treatment plant is ensured to stably realize that the effluent quality reaches the standard and the energy consumption is reduced to the greatest extent under complex working conditions.

The invention relates to the field of sewage treatment, in particular to a sewage treatment optimization method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring treatment parameters such as inlet water quality data, instantaneous flow, sewage types and outlet water quality requirements, matching corresponding treatment process constraint conditions according to the sewage types, and formulating differentiated treatment strategies according to characteristics of different types of sewage such as industrial wastewater, domestic wastewater and medical wastewater; the method comprises the following steps: determining sewage treatment data by combining instantaneous flow, effluent quality requirements and treatment process constraint conditions, calculating an aeration rate regulation value, sludge reflux and chemical agent dosage, realizing dynamic optimization of treatment parameters, generating a control instruction based on the optimized sewage treatment data, and issuing the control instruction to a sewage treatment system. The sewage treatment efficiency is effectively improved, and multi-target collaborative optimization sewage treatment is realized.

The invention belongs to the technical field of data processing, and provides a breeding tail water treatment method and system of rice straw modified biochar, and the method specifically comprises the following steps: firstly, arranging a flow sensor at a water inlet of a fluidized bed, reading the water inlet flow, and obtaining the aeration rate from an aeration device of the fluidized bed in real time; then, when the change rate of the water inlet flow exceeds a threshold value, self-adaptive aeration rate regulation intervention is carried out; wherein the self-adaptive aeration rate regulation intervention process comprises the following steps: constructing an aeration adaptive model through the water inlet flow and the aeration rate to obtain an adaptive pairing amount; and controlling the aeration rate according to the adaptive pairing amount. The occurrence risk of collapse of the fluidizing medium particles caused by water inlet flow change and aeration rate transition during culture tail water treatment of the fluidizing medium particles constructed by the rice straw modified biochar is dynamically quantified; fluidizing medium particles constructed by the rice straw modified charcoal are prevented from being crushed due to excessive aeration or sharp increase of water flow, and the operation quality and the service life of the fluidized bed are improved.

The invention relates to the technical field of control scheme design for precise aeration of a sewage treatment plant, in particular to a control method and system for precise aeration of a sewage treatment plant and electronic equipment. The control method comprises the following steps: acquiring real-time operation data of a sewage treatment process through the data acquisition device, constructing an accurate aeration mathematical model and a mechanism model, performing data mining and analysis by using the control module, calculating the optimal aeration rate, and dynamically adjusting the operation state of the aeration equipment. The system has real-time data processing and control functions. According to the system, the aeration energy consumption is reduced, the effluent quality is guaranteed to reach the standard, the system has the characteristics of intelligence, automation, energy conservation and consumption reduction, through deep integration of multidisciplinary technologies, the intelligent level of aeration control of a sewage treatment plant is remarkably improved, an economic, efficient and reliable solution is provided for the industry, and the system is worthy of popularization and application. The method has wide application prospects and remarkable economic benefits.

The invention discloses an aeration rate control method, device, equipment and product for sewage treatment, and the method comprises the steps: obtaining a predicted aeration efficiency value at the current time through a neural network model; determining a current required aeration rate value for removing unit ammonia nitrogen; and finally calculating an actual aeration rate value. According to the aeration rate control method, device, equipment and product for sewage treatment disclosed by the invention, rapid reaction can be carried out according to the actual change condition in the region in the aerobic tank corresponding to aeration, the aeration rate value in the region can be immediately adjusted, and the aeration rate control method, device, equipment and product have the advantages of high aeration rate control reaction speed and high aeration rate control precision; the sewage treatment efficiency and quality are effectively improved.

The invention relates to the technical field of sewage treatment, and aims to solve the problems that an existing mode of manually adjusting the frequency of a fan and the opening degree of a valve is rough and not fine, the aeration rate is easy to excessively increase and the energy consumption is increased, and an existing precise aeration control system adopts a water quality analysis model and a fuzzy neural network controller and is small in application range, complex and high in investment cost. The invention provides a precise aeration control method and system based on an AAO process. The method comprises the steps that S1, water inlet data, water outlet data and process instrument data are monitored and collected; s2, setting an aerobic tank dissolved oxygen target value according to effluent ammonia nitrogen online monitoring data; s3, calculating the corresponding fan frequency or valve opening according to the difference between the actual value of the dissolved oxygen in the aerobic tank and the target value of the dissolved oxygen in the aerobic tank; s4, the fan frequency or the valve opening degree is automatically adjusted according to the fan frequency or the valve opening degree determined in the step S3; and S5, judging whether the adjustment of the fan frequency and the valve opening degree reaches the standard or not according to the effluent ammonia nitrogen data.

The utility model relates to the technical field of sewage treatment, and provides an aerobic granular sludge densification preparation device and a sewage treatment system.The aerobic granular sludge densification preparation device comprises a body, a sludge inlet pipe and a sludge outlet pipe, an inlet of the anoxic zone is suitable for being communicated with an external sewage source; the baffling reaction area is provided with a plurality of first channels and second channels which are connected; an inlet of the aerobic zone is communicated with an outlet of the baffling reaction zone, and an outlet of the aerobic zone is communicated with an outlet of the anoxic zone. According to the aerobic granular sludge densification preparation device, aerobic granular sludge can be generated, compared with flocculent sludge, the granular sludge has good settleability, and the increase of the cost of post-stage precipitation separation is avoided. Moreover, the biomass of the granular sludge is increased, and the granular sludge is rich in variety, so that the treatment load can be improved under the same aeration rate. In addition, technical improvement and upgrading can be achieved under the condition that existing technological conditions are not affected, and the risk of production halt construction or operation with water is avoided.

The invention provides a goethite composite treatment agent and a preparation method and application thereof. The goethite composite treating agent is composed of goethite, MnO and Mn2O3, the ammonia nitrogen oxygenase activity of ammoxidation microorganisms is improved in the sludge composting process, and then the ammonia loss and nitrogen volatilization of compost products are reduced. Straws are also added into the sludge to increase the oxygen content in the composting process of the sludge. In addition, the iron ore, the manganese oxide and the component mixing proportion in the goethite composite treating agent are screened, and the adding amount of the goethite composite treating agent and the straw in the sludge composting process and the moisture content and the aeration rate of a pile body are screened. The sludge composting method provided by the invention has the advantages of simplicity in operation, high treatment efficiency, good effect and the like, is suitable for large-scale high-quality preparation of sludge composting products, is suitable for large-scale application, and solves the problems of serious nitrogen loss, large emission of harmful nitrogen gas and the like in the existing sludge aerobic composting.

The invention provides a liquid manure fermentation dynamic optimization control system and method. The system comprises a pretreatment module, a fermentation module, a dynamic regulation and control module, an aeration stirring module, an environment control module and a safety monitoring module. Wherein the pretreatment module comprises a solid-liquid separation unit, a PH regulation unit and an impurity interception unit; the fermentation module comprises a sectional fermentation tank group and an inter-tank conveying system; the dynamic regulation and control module comprises a parameter sensing array and an aeration rate regulating valve group; the aeration stirring module comprises a suspended aeration unit and a mechanical-pneumatic dual-mode stirrer; the environment control module comprises a heat exchange system and a humidity maintaining unit; the safety monitoring module comprises a gas early warning subsystem and a pressure balancing device, and a three-in-one technical route of'multi-mode sensing, staged regulation and control and energy closed loop 'is provided to solve the two core problems of insufficient dynamic adaptability and low system energy efficiency in the prior art.

The invention provides plant fermented oil with moistening and soothing effects and a preparation method thereof. The preparation method comprises the following steps: fermenting aspergillus in a fermentation culture medium 1, adding candida albicans, inoculating into a fermentation culture medium 2, carrying out primary fermentation under the ventilation capacity of 2-4 L / min, carrying out secondary fermentation under the ventilation capacity of 0.2-0.5 L / min, separating, and sterilizing to obtain the plant fermented oil. The aspergillus and candida mellifera are mixed and fermented according to a specific sequence, so that the obtained plant fermented oil has excellent soothing and moistening effects. Besides, compared with products obtained through fermentation in other modes, the plant fermentation oil has more excellent soothing and moistening effects and is very suitable for being used as and / or used for preparing cosmetics or medical compositions.

The invention discloses a rural sewage aeration treatment device which comprises a treatment pond, a plurality of supporting legs are fixedly connected to the bottom side wall of the treatment pond, a mounting box is fixedly connected to the bottom side wall of the treatment pond, a motor is fixedly connected to the interior of the mounting box, a rotating rod is fixedly connected to an output shaft of the motor, and the rotating rod is fixedly connected to the bottom side wall of the treatment pond. The rotating rod penetrates and extends into the treatment tank, the rotating rod is rotationally connected to the bottom side wall of the treatment tank through a sealing bearing, a laser rotating speed sensor is mounted on the inner side wall of the mounting box, and the laser rotating speed sensor faces the bottom of the rotating rod and is used for detecting the rotating speed of the rotating rod; the interior of the rotating rod is hollow, and a plurality of hollow air guide pipes are fixedly connected to the side wall of the rotating rod. The sewage stirring speed and the aeration rate are dynamically adjusted according to the turbidity, the pH, the dissolved oxygen concentration and the chemical oxygen demand value of sewage, so that the high efficiency of sewage treatment is ensured, and the practicability is high.

The invention provides an aeration control method and device based on sewage treatment and related equipment.The method comprises the steps that water inlet data of a reaction tank in a sewage plant are collected in real time, the water inlet data comprise the water inlet amount and the water inlet quality, and the water inlet quality comprises the chemical oxygen demand (COD), the ammonia nitrogen concentration, the dissolved oxygen content (DO) and the mixed liquid suspended solid concentration (MLSS); inputting the current water inlet data of the reaction tank into a preset detection model to obtain the water inlet load of the reaction tank in the first time period; inputting the water inlet load into a preset mixed logic model to obtain a target aeration rate required by the reaction tank in the first time period; and based on the target aeration rate, controlling the frequency of the fan and / or the opening degree of the electrically operated valve in the first time period. By applying the method provided by the embodiment of the invention, the aeration rate in a period of time in the future can be predicted through the detection model and the mixed logic model, so that the fan power and the electric valve are accurately controlled according to the predicted aeration rate, and energy waste is avoided.

The utility model discloses a self-cleaning perforated aeration device which comprises an air blower, a main air supply pipe, a connecting pipe, a flow regulating valve and a perforated aeration pipe, the perforated aeration pipe comprises a self-cleaning release pipe, a first elbow, a horizontal perforated pipe and a second elbow, the first elbow and the second elbow are respectively arranged at two ends of the horizontal perforated pipe, the opening direction of the first elbow faces downwards and is connected with the self-cleaning release pipe, and the opening direction of the second elbow faces upwards; a main aeration hole and an auxiliary aeration hole are formed in the horizontal perforated pipe. The main aeration holes and the auxiliary aeration holes in different numbers are formed in different positions of the horizontal perforated pipe, and the self-cleaning release pipe is arranged at the tail part of the horizontal perforated pipe, so that when the main aeration holes are blocked, the aeration rate can be ensured through the auxiliary aeration holes, and when the main aeration holes are seriously blocked, the aeration rate can be ensured. And the horizontal release pipe can be cleaned through the self-cleaning release pipe.

The invention relates to the technical field of sewage treatment, in particular to an efficient denitrification sewage treatment system and a sewage treatment method. The efficient denitrification sewage treatment system comprises an adjusting tank, an MABR tank, an AOA tank, an MBR tank, a conveying module, a detection module, a doser and an aeration rate regulator. Sewage is conveyed by the conveying module through the adjusting tank, the MBAR tank, the AOA tank and the MBR tank in sequence, water quality data of the sewage is detected by the detection module, and chemicals are added into the adjusting tank and the MBR tank by the chemical feeder, so that impurities in the sewage are separated according to particle sizes, and a biological membrane is prevented from being blocked by the impurities with large particle sizes; the treatment pressure of membrane aeration separation, aerobic and anaerobic separation and membrane separation is reduced. According to the invention, the aeration rate in the MABR tank is optimized through the aeration rate regulator, so that the optimal cooperation of the denitrification rate and the aeration rate is realized, the denitrification efficiency and the denitrification effect are effectively improved, the treatment cost is reduced, and the water quality is further optimized.

The invention relates to the technical field of water treatment, and discloses a continuous flow self-circulation aerobic granular sludge-membrane bioreactor constructed based on a satiation-starvation alternating strategy and application thereof, and the continuous flow self-circulation aerobic granular sludge-membrane bioreactor comprises an aerobic zone and an anaerobic zone which are arranged in series. The method is characterized in that in the anaerobic zone, raw sewage and aerobic granular sludge are in full contact and react through the shearing force of a stirring paddle and the separation effect of gravity selection pressure, and a satiation period is formed. And then, under the aeration action of the aerobic zone, the mud-water mixture further reacts to form a starvation period. The liquid level difference and the sludge density difference formed between the two areas provide self-driven backflow power for the system. According to the scheme, the reactor adopts three-low operation conditions (low aeration rate, low circulation rate and low stirring rate), rapid in-situ culture and high granulation rate of the aerobic granular sludge are realized in a continuous flow mode, the obtained granular sludge has the characteristics of large particle size, smooth surface, compact structure and the like, and the effluent quality reaches the surface water class III standard.

The invention relates to the technical field of sewage treatment, and discloses a gradually-decreasing aeration and mechanical stirring coupled plug-flow type aeration device which comprises a plug-flow type aeration device body, an air distribution main pipe and aeration branch pipes are installed in the plug-flow type aeration device body, and the installation density of the aeration branch pipes is gradually decreased along the way of the plug-flow type aeration device body; the air blower is connected with the air distribution main pipe; the gas flow meter is mounted on the gas distribution main pipe; the microporous aerators are mounted on the aeration branch pipes; and the stirring system is mounted at the middle-rear section of the aeration tank with insufficient aeration stirring effect, and is used for enhancing the stirring effect to keep the activated sludge mixed liquid in a suspended state and enhancing the oxygen mass transfer efficiency. According to the present invention, the aeration rate is accurately controlled through the gradually-reduced aeration mode according to the oxygen demand of the sewage at different positions of the plug-flow type aeration device, such that the excessive aeration at the rear section in the traditional aeration mode is avoided, the power consumption is effectively reduced, the energy saving purpose is achieved, and the biochemical system can stably operate.

The invention discloses a haematococcus culture dissolved oxygen coupling regulation and control method for a corrosion-resistant photoreactor, relates to the field of bioengineering, and builds a photoreactor made of a corrosion-resistant material and a matched regulation and control system; preparing a special improved BG-11 culture medium for haematococcus and injecting the culture medium into the photoreactor; oxygen transfer coefficients under different ventilation rates are calibrated through a dynamic method, a ternary equation of light intensity, cell density and oxygen production rate is fitted by combining photosynthetic characteristics of haematococcus, and a basic model for dynamic prediction of dissolved oxygen is established. According to the method, the photoreactor made of a corrosion-resistant material and a matched regulation and control system are built, so that the interference of material dissolution on the culture medium is effectively avoided, and the stability of a haematococcus culture environment is guaranteed. Based on a ternary fitting equation of an oxygen transfer coefficient calibrated by a dynamic method, light intensity, cell density and oxygen production rate, a basic model for dynamic prediction of dissolved oxygen is constructed, and accurate coupling regulation and control of dissolved oxygen are realized by combining model prediction control and reinforcement learning agents.

The invention particularly relates to a regulating valve provided with a flow velocity detection device and capable of accurately controlling aeration flow, which is characterized by comprising a polygonal flow regulating valve and the flow velocity detection device, and the flow velocity detection device is arranged on the polygonal flow regulating valve. And a detection head of the flow velocity detection device is positioned in a valve body flow channel of the polygonal flow regulating valve. According to the accurate aeration rate control valve, the defects in the prior art are overcome, the aeration rate in an accurate aeration system can be accurately controlled, the requirements of all process stages for the aeration rate are completely met, and therefore energy can be further saved while the sewage treatment quality is guaranteed; and a good foundation is laid for comprehensive popularization of the accurate aeration system in the sewage treatment industry.

The invention is applicable to the technical field of urban sewage treatment, and provides a robust fault-tolerant control method for dissolved oxygen concentration in an urban sewage treatment process, which comprises the following steps of: constructing a control system kinetic model containing faults and disturbance, establishing a nonlinear observer to estimate the faults and the disturbance, and constructing a fuzzy neural network to estimate an unknown nonlinear function. And designing a robust fault-tolerant controller based on self-adaptive dynamic programming, optimizing a control law through strategy iteration, neural network implementation and an experience playback mechanism, and finally realizing dissolved oxygen concentration control by adjusting the aeration rate. Experimental results show that the method can effectively cope with actuator faults and external disturbance, it is ensured that the dissolved oxygen concentration stably tracks the set value, and the robustness of a sewage treatment system and the effluent quality standard-reaching rate are improved.

The invention relates to the technical field of sewage treatment, and particularly discloses a sewage treatment control method based on AI intelligent driving, and the method comprises the following steps: S1, collecting parameters in real time; s2, inputting the parameters into a pre-trained random forest model to obtain an output aeration rate set value, a sludge reflux ratio and a carbon source feeding rate; s3, adjusting the rotating speed of an aeration fan of the aerobic tank according to an aeration rate set value, adjusting the frequency of a sludge reflux pump according to a sludge reflux ratio, and adjusting a metering pump to add a sodium acetate solution according to a carbon source adding rate; and S4, when the turbidity of the MBR membrane pool exceeds a turbidity threshold value, giving out an early warning, further judging whether the transmembrane pressure difference of the MBR membrane pool exceeds a transmembrane pressure difference threshold value or whether the membrane flux attenuation exceeds a membrane flux attenuation threshold value, and if so, starting a pulse backwashing program.

The invention provides a recycling cooperative treatment system and method for three wastes in large-scale livestock and poultry breeding. The system comprises a pretreatment unit, a grating and a solid-liquid separator, wherein the solid-liquid separator is used for carrying out solid-liquid separation on livestock and poultry manure, and wastewater is coagulated and settled in a primary settling tank; the wastewater recycling unit is used for removing high-concentration organic matters from wastewater in a UASB reactor, purifying and utilizing generated biogas, settling the wastewater in an anaerobic settling tank, then feeding the wastewater into an AO-Anammox tank for denitrification, saving the aeration rate by 62.5%, feeding the wastewater into a final settling tank for dosing and dephosphorization, carrying out ozone oxidation treatment, and discharging most treated water into a municipal pipe network; in the circulating deodorization unit, a small part of treated water flows into a reclaimed water recycling workshop and is pumped into a deodorization room through a recycling water pump to remove breeding waste gas, and the outflowing deodorized water is converged into the anaerobic sedimentation tank to be continuously treated; and manure residues and sludge generated by the solid waste recycling unit and the pretreatment unit and concentrated sludge generated by the biochemical pool are subjected to dehydration treatment, composting and returning to the field.

This invention pertains to microbial fermentation, specifically a method for preparing a fermentation broth containing β-1,3 / α-1,3-glucan. The method involves inoculating *Rhizobium spp.* into a sterilized fermentation medium containing carbon sources, nitrogen sources, and essential nutrients, followed by aerated fermentation. The carbon source in the fermentation medium is sucrose, and the nitrogen source is soy protein isolate. The aeration rate is controlled in stages, and nitrogen sources and hydrogen peroxide are supplemented during fermentation. This invention solves the problem of low fermentation yield in existing technologies, offering advantages such as high fermentation broth viscosity, a fermentation yield of 25 g / L to 30 g / L, and good water solubility of the prepared product.

Methods, systems, and apparatuses for anaerobic digestion of waste fibrous material and the recovery of nutrients are provided. Methods, systems, and apparatuses disclosed herein provide mechanisms to release dissolved gases from anaerobic digester effluent. Methods, systems and apparatuses disclosed herein can recover one or more nutrients from anaerobic digested effluent using a range of temperatures, aeration rates, aeration times, pH ranges, and settling times.

The utility model discloses an aeration mechanism for urban sewage treatment, which relates to the technical field of aeration for sewage treatment and comprises a rotating cover, the rotating cover is connected with a fixed base through a rotating component, the fixed base is positioned below the rotating cover, the top end surface of the rotating cover is spherical and is provided with a plurality of air holes, and the air holes are communicated with the rotating cover. A multi-nozzle air injection assembly penetrating to the position above the fixed base is installed at the bottom end of the fixed base, and a plurality of baffles are fixedly installed on the lower portion of the inner wall of the rotating cover and distributed at equal intervals in the circumferential direction. By arranging the multi-nozzle air injection assembly, the rotating assembly and the baffle, the spherical rotating cover can be driven to rotate in the aeration process, and air overflows outwards in a spiral motion state along with the rotation of the rotating cover, so that the aeration range is enlarged, and the aeration operation efficiency is improved.