112 results about "Aeration rate" patented technology

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 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 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 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 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 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 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 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.

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

This invention relates to a device and method for rapidly starting a short-cut nitrification process, belonging to the field of water treatment. The invention involves inoculating a secondary sedimentation tank with sludge and adding a polyurethane biological sponge carrier into a sequencing batch reactor (SBR). First, a phased influent influent + incremental post-aeration strategy (increasing aeration time first, then increasing aeration rate) is adopted. This utilizes nitrate and a dynamic oxygen environment to drive the migration of *Candidatus Contendobacter* to the sponge carrier and complete its enrichment and acclimatization, reducing the obstruction of O2 on the endogenous denitrification process of *Candidatus Contendobacter* under aerobic conditions. The phased influent influent is then eliminated, and NH4 is introduced. + -N synthesis wastewater is treated using a low-alkalinity strategy (reducing influent KHCO3 concentration) + post-aeration with an initial increase followed by a decrease in aeration volume, combined with strong NO2 stimulation from Candidatus Contendobacter in a low dissolved oxygen environment. ‑ -N reducing power inhibits NOB growth, enabling rapid start-up of the short-cut nitration process.

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.

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 invention relates to a novel spiral-flow aeration device which comprises a slitting mechanism used for cutting bubbles, a gas injection mechanism used for carrying out spiral aeration on liquid is arranged at the liquid inlet end of the slitting mechanism, and a positioning mechanism used for fixing is arranged at the liquid outlet end of the slitting mechanism; the slitting mechanism comprises a slitting cylinder, a plurality of slitting rings arranged at intervals are installed in the slitting cylinder, the radial outer portions of the slitting rings are detachably connected with the interior of the slitting cylinder, a plurality of slitting rods extending towards the centers of the slitting rings are arranged in the radial inner portions of the slitting rings, and slitting heads are arranged at the outer ends of the slitting rods. A rotational flow groove is formed between every two adjacent slitting rings and the inner wall of the slitting cylinder. According to the aeration device, spiral aeration of liquid is realized, the resistance of the liquid in the aeration device is reduced, and meanwhile, the stability and the aeration rate of the aeration device are effectively improved.

The utility model relates to an efficient photoelectric Fenton treatment device. The efficient photoelectric Fenton treatment device structurally comprises a circulating water device, an aeration device, an electrode device and a photoelectric Fenton reaction device, wherein the photoelectric Fenton reaction device is formed by sequentially connecting a plurality of flange columns, and an iron anode or a stainless steel cathode is tightly pressed between the attached flange plates in a sealing manner; an inlet of the circulating water device is connected with the bottom of the photoelectric Fenton reaction device, and an outlet of the circulating water device is connected with the top of the photoelectric Fenton reaction device; a volume cavity is formed in the bottom of the flange column at the bottom and is connected with an aeration device; an opening is formed in the top of the flange column located at the top, and an ultraviolet lamp is arranged at the opening. According to the photoelectric Fenton treatment device, high-concentration organic wastewater can be treated with low energy consumption, high dissolved oxygen concentration on the surface of the electrode can be maintained with low aeration rate, meanwhile, a certain stirring effect is achieved, and the ultraviolet lamp is additionally arranged, so that H2O2 decomposition and conversion from Fe < 3 + > to Fe < 2 + > are facilitated, the reaction efficiency is improved, and the yield of iron mud is reduced.

The invention discloses an embedded composite wetland system and a method for intensively removing COD (Chemical Oxygen Demand), NH3-N and TN (Total Nitrogen). Comprising a primary regulating tank and a secondary regulating tank, wherein a first-stage aerobic regulating region and a first-stage anoxic region integrally arranged below the first-stage aerobic regulating region are arranged in the first-stage regulating tank; a second-stage aerobic adjusting area and a second-stage anoxic area integrally arranged below the second-stage aerobic adjusting area are arranged in the second-stage adjusting tank; and the first-stage anoxic zone and the second-stage anoxic zone are communicated through a communicating pipe. An aerobic zone and an anoxic zone at the same stage are embedded up and down, and two stages of regulating tanks are communicated through a communicating pipe and are connected in series; and a reflux pump is positioned in the second-stage aerobic zone and respectively flows back to the first-stage anoxic zone and the second-stage anoxic zone. By adjusting the aeration rate, the reflux ratio and the reflux quantity, target pollutants are removed in a targeted manner, and COD, NH3-N and TN are removed in an enhanced manner.

The invention relates to the technical field of sewage treatment, in particular to a low-carbon-nitrogen-ratio SOA sewage treatment denitrification process. According to the process method, a mixing tank, a separation tank, a first aerobic tank and an anoxic tank which are connected in sequence are adopted, part of sludge in a secondary sedimentation tank flows back to the mixing tank, part of the sludge flows back to the front end of the first aerobic tank, and meanwhile, the sludge at the bottom of the separation tank is conveyed to the front end of the anoxic tank; therefore, in the process disclosed by the invention, COD (Chemical Oxygen Demand) in the inlet water is adsorbed and solidified in the mixing tank through the activated sludge, and is settled in the separation tank, so that the separation of COD and nitrogen is realized; the COD is conveyed to the anoxic tank, so that the carbonization of the COD in the aerobic tank is avoided, the aeration rate is reduced, the nitrification of ammonia nitrogen is facilitated, and meanwhile, the sludge yield of the aerobic tank is also reduced; cOD is used as a carbon source for denitrification of the anoxic tank, so that the denitrification utilization rate of COD is increased; and the method has positive significance on resource saving, energy conservation and consumption reduction.

This invention provides a portable flotation aeration rate testing instrument and measurement method. The instrument includes a mechanical package and instruments installed within the mechanical package. The mechanical package includes a front cover, a middle cover, an inner cover, a rear cover, a battery cover, a variable diameter guide pipe, and an exhaust pipe. The front and rear covers are closed, with the middle cover located between them. The inner cover is fixed to the middle cover, and the battery cover is located inside the middle cover. The instruments include a miniature thermal flow meter, an LCD screen, a switch, a microcontroller, and a lithium battery power supply. The miniature thermal flow meter is fixed inside the middle cover with bolts, the LCD screen is fixed to the inner cover with adhesive, the switch is fixed to the inner cover, the microcontroller is fixed to the middle cover, and the lithium battery power supply is located inside the middle cover. This invention reduces testing steps and equipment weight during measurement, eliminates experimental errors caused by visual observation of liquid level changes and manual timing, avoids installing too many instruments, and saves costs.

The invention discloses an accurate aeration method for optimizing a BP neural network based on a chicken flock algorithm, and the method comprises the steps: firstly building a back propagation (BP) neural network model which takes a water inlet and outlet index and a historical aeration rate as inputs and takes a current aeration rate as an output for the key index dissolved oxygen of sewage treatment; and then the weight and the threshold value of the BP neural network are optimized through a chicken flock algorithm. According to the method, structural parameter optimization is carried out aiming at the defect that the BP neural network is easy to fall into a local minimum value, the robustness of a control process is improved, and the identification precision of the BP neural network is improved, so that the requirement on a precise aeration system in actual work of sewage treatment is met, and the energy consumption of a sewage plant is effectively reduced.