78 results about "Oxygen uptake rate" patented technology

The present invention provides a resin composition having an oxygen scavenging function. The resin composition comprises a gas barrier resin (A), a thermoplastic resin (B) other than the gas barrier resin (A), and a compatibilizer (C), wherein the gas barrier resin (A) has an oxygen transmission rate of 500 ml.20 mum/m2.days.atm (20° C., 65% RH) or less, the thermoplastic resin (B) has a carbon-carbon double bond, and an oxygen absorption rate of the resin composition is 0.001 m/m2.day or more.

The present invention allows biomass and/or biomass-produced components to be obtained at high yields by executing numeric simulation of flow to reasonably identify the running conditions suitable for a fermenter. The control device according to the present invention comprises an input means for entering measured data from a measurement means, which measures nutrient components, the concentrations of oxygen, carbon dioxide, and biomass in a culture medium; a computation means for calculating nutrient components uptake rate, oxygen uptake rate and carbon dioxide exhaust rate per unit amount of biomass from the measured data entered at the aforementioned input means, as well as volumetric mass transfer coefficient kLa from turbulent energy k and a turbulent energy dissipation rate e, both of which are calculated by a transport equation, as well as a diffusion coefficient D, followed by calculating the concentrations of the nutrient components, dissolved oxygen, and dissolved carbon dioxide in any area in the fermenter using an algorithm to numerically integrate a differential equation describing variations in medium components over time from the calculated nutrient components uptake rate, the calculated oxygen uptake rate, the calculated carbon dioxide exhaust rate, and the calculated volumetric mass transfer coefficient kLa; and a display means for displaying concentration distributions of the nutrient components, dissolved oxygen, and dissolved carbon dioxide in the fermenter based on the concentrations of the nutrient components, dissolved oxygen, and carbon dioxide in any area of the fermenter calculated at aforementioned computation means.

An advanced control system for a membrane bioreactor based wastewater treatment plant is disclosed. The disclosed control system comprises a membrane bioreactor (MBR) system and a microprocessor based controller that receives signals corresponding to selected measured MBR parameters and calculates or estimates one or more MBR calculated parameters including Membrane Conductivity (Fxc); and/or Oxygen Uptake Rate (OUR). The microprocessor based controller compares one or more calculated or estimated MBR parameters to prescribed setpoints or desired ranges and governs one or more pumps and valves in the MBR system to adjust the cleaning cycle the MBR system, the MBR flows in the MBR system, or the influent flow to the biological basin in response thereto.

A system for monitoring municipal saprobia inhibitive ability in real time based on oxygen uptake rate (OUR) comprises an aeration siphon device communicated with a sewage supplying system and a sludge supplying system. The aeration siphon device is composed of an aeration groove and a siphon groove in adjoining mode, the wall of the aeration groove is higher than that of the siphon groove, the aeration groove is communicated with the sewage supplying system and the sludge supplying system, and the siphon groove is communicated with an inlet of a closed coiler flow-pushing type bioreactor through a siphon tube. A dissolved oxygen (DO) detection system detects DO values of the inlet and an outlet of the closed coiler flow-pushing type bioreactor, and the signal output end of the DO detection system is connected onto a programmable logic controller (PLC) control system which is connected with an alarm system. The core part of system for monitoring municipal saprobia inhibitive ability in real time adopts the closed coiler flow-pushing type bioreactor so as to monitor the DO value of the inlet and the DO of the outlet in real time, automatically calculate mutation condition of activated sludge OUR, determines OUR mutation rate with different inhibition degree through plenty of experiments, and judge inhibitable degree of the saprobia by comparing automatically calculated OUR mutation rate with a preset value.

The invention discloses an aeration control system. The system comprises a data acquisition unit, a PLC (programmable logic controller) control unit and an aeration unit, wherein the data acquisition unit comprises an OUR (oxygen uptake rate) tester and a DO (dissolved oxygen) tester, and the aeration unit comprises an air blower, a micropore aeration head and a flowmeter. The invention further provides an aeration control method adopting the aeration control system. System automatic control software calculates the aeration quantity required to be supplied in combination with the OUR value and DO value automatically acquired by an online tester as well as the OTE value calculated according to the OUR value and the aeration quantity by inputting an automatic control algorithm, a signal is output to change the flow of air blowing, the DO is stabilized at the set value, the deviation doesn't exceed 0.5 mg/L, dynamic balance of supply and demand of oxygen is realized, the problem of poorer effluent quality due to insufficient oxygen supply can be solved completely, besides, energy waste caused by excessive aeration can also be reduced, and the function of evaluating the performance of the aeration system is realized.

The invention relates to a method for monitoring the biological treatment oxygen uptake rate of sewage and controlling the aeration quantity. The method comprises the following steps: determining the oxygen transfer coefficient KLa(d<-1>) of aeration oxygenation and the saturated dissolved oxygen concentration mg/L under different air flow q, temperature and preset sludge concentration conditions, finding relation of the oxygen transfer coefficient KLa to the air supply amount q and the temperature T, fitting the dissolved oxygen change curve within a period of time under the preset oxygen transfer coefficient KLa(d<-1>) and dissolved oxygen concentration conditions in order to find the oxygen uptake rate within the period of time, utilizing the oxygen uptake rate of a last period of time as the possible oxygen uptake rate of a next period of time, finding the lowest aeration quantity q of the next period time for reaching the preset dissolved oxygen concentration, applying the above found air quantity q into a reactor within a following period of time, determining the dissolved oxygen change curve of the following period of time, and finding the oxygen uptake rate within the following period of time. The method overcomes the defects of large equipment investment, complex construction, low test frequency and the like existing in the prior art. The method enables OUR (oxygen uptake rate) to be continuously monitored only through using a dissolved oxygen probe without an extra auxiliary reactor, an extra dissolved oxygen probe or a sewage transmission device.

A waste treatment method includes the concentration of selected strains of bacteria in a selected medium in the presence of nutrients and water, under aerobic conditions. This concentrated batch is thereafter discharged for downstream applications in wastewater remediation. The present invention employs a cultivation chamber having inlet ports and a circular vent port that allows for adequate air introduction and heat release. Aeration is achieved by recirculation of the fluid medium from the top of the apparatus through a pipe that runs the length of the inner wall and is specially configured at the top to minimize cell damage. Fluid can be routed tangentially in both the clockwise and counterclockwise directions within the chamber. The conical bottom also has an orifice allowing for recirculation of the fluid medium tangentially to the sidewalls. Upon completion of the batch cultivation, the medium and bacteria are discharged for downstream applications in wastewater remediation of paper mill, chemical plant, oil refinery, and other industrial effluents. The aeration and circulation of the fluids is designed to limit cells shearing and damage yet achieve critical cell mass (e.g. between 10⁷ and 10¹⁰ cfu (colony forming units) per milliliter (ml)) and dissolved oxygen uptake rates (e.g. between about 50 and 1500) during cultivation.

The present invention relates to fungal host cells that are transformed with a nucleic acid construct encoding a fungal oxygen-binding proteins or fragments thereof that comprise the oxygen-binding domain. Upon transformation of the host cell with the construct, the oxygen-binding protein confers to the host cell improved fermentation characteristics as compared to untransformed host cells. These characteristics include e.g. increases in oxygen uptake rates, biomass densities, volumetric productivities and/or product yields. The invention further relates to fermentation processes in which the host cells are used and to fungal oxygen binding proteins, in particular fungal flavohemoglobins and hemoglobin domains, and to nucleotides sequences encoding these proteins.

The invention discloses a method for evaluating the toxicity and the biodegradability of chemical wastewater and belongs to the field of water pollution control. Relative oxygen consumption is adopted to evaluate the biodegradability and the toxicity of chemical wastewater: (1) if STOD of a water sample to be detected is larger than 1, a matrix in wastewater has no toxicity and is biodegradable, and the larger the STOD value is, the better the biodegradability is; (2) if STOD of the water sample to be detected is equal to 1, the matrix in wastewater has no toxicity but is non-degradable; and (3) if STOD of the water sample to be detected is smaller than 1, the matrix in wastewater has toxicity and is non-degradable, and the smaller the STOD value is, the stronger the toxicity is. A method for measuring the oxygen consumption and the oxygen uptake rate of microbes in real time is adopted, so that errors caused by adopting a dilution multiple method to measure BOD5 are avoided, the problem that BOD5 cannot evaluate the toxicity of wastewater is solved, and the method provided by the invention is convenient and quick and can acquire measurement results within 20 min.

A method and system for controlling dissolved oxygen levels in a secondary treatment system of a wastewater treatment facility that can employ a membrane bioreactor in which oxygen introduction into mixed liquor is controlled to prevent bulking and minimize generation of extra cellular polymeric substances. The control is exercised by insuring that dissolved oxygen levels within the mixed liquor do not fall below a minimum system level at which microorganism stress would occur. This is done by setting a minimum dissolved oxygen level control point equal to a sum of the minimum system level and an adjustment factor determined on the basis of oxygen uptake rate and time delays inherent in sensing oxygen levels and changes thereof within the mixed liquor. The minimum system dissolved oxygen level can be continually calculated on the basis of an inferred food to mass ratio that would vary with sensed mixed liquor suspended solids.

The invention provides a method for optimizing and scaling up the fermentation process using a bioreactor device. The method comprises the following steps: 1. measuring physiological parameters and the related characteristics or combined characteristics of the physiological parameters of the fermentation process of the bioreactor device, wherein the physiological parameters are selected from the following parameters: dissolved oxygen, oxygen uptake rate, pH, carbon dioxide excretion rate, respiratory quotient, living cell rate or cell shape, consumption of measured metabolic product or matrix or combined characteristics; and 2. comparing the physiological parameters and the related characteristics or combined characteristics which are measured in the step 2, with preset physiological parameters and the related characteristics or combined characteristics; selecting a bioreactor device of which data are most similar to the preset values; and determining the optimized and scaled-up bioreactor device, wherein the physiological parameters are shown in the step 1.

The present application discloses an adjustment method and adjustment device for a slope and speed of a treadmill based on cardiorespiratory fitness. The method comprises the following steps: estimating the maximum oxygen uptake rate of a user based on basic information of the user; classifying the exercise risk and age of the user based on the basic information of the user, and obtaining initialvalues of three-level load of the user in a submaximal test mode based on the exercise risk, age and maximum oxygen uptake rate of the user; and obtaining a load value of the submaximal test of the user based on the maximum oxygen uptake rate, comparing a load value with a set threshold value of each-level load to determine the exercise state, and obtaining the speed and slope of the treadmill test under each-level load according to the relationship of each-level load value and the speed and the slope in different exercise states. The method provided by the present application can classify thetest load in a personalized manner based on the exercise risk and age, and facilitates avoiding the occurrence of cardiovascular events due to irrational intensity during the test; and meanwhile, themethod can quickly obtain the test speed and slope value.

The invention specifically relates to a preparation method for a composite inhibitor used for preventing and handling serf-combustion of coal, belonging the technical field of prevention of serf-combustion of coal. The preparation method comprises the following steps: with sodium-based montmorillonite as a raw material, carrying out ultrasonic dispersion and then subjecting the dispersed sodium-based montmorillonite to ion exchange with ferric trichloride; then with cetyl trimethyl ammonium bromide as an intercalator, preparing high-dispersibility modified iron-based montmorillonite; subjecting reduced iron powder, graphite and copper powder to ball milling and alloyage and carrying out physical combination under the action of pressure to form a short-circuit corrosion microbattery together so as to improve an oxygen uptake rate; then loading modified iron-based montmorillonite with magnesium chloride; and then carrying out compounding with carboxymethyl cellulose, ethyl acetate, gelatin and the like so as to obtain the composite inhibitor used for preventing and handling serf-combustion of coal. The composite inhibitor used for preventing and handling serf-combustion of coal can deeply enter the pores of coal, consumes oxygen in a surrounding environment, reduces the temperature of coal due to its water absorption performance, decreases contact between coal and oxygen and lowers the possibility of serf-combustion of coal.

The invention discloses a device and method for online detecting oxygen and carbon dioxide in a biological fermentation tail gas. The device comprises a water removing device, a gas detecting chamber, a singlechip, a heat radiating fan, a power supply and a PC (Personal Computer) terminal, wherein the gas detecting chamber comprises a gas inlet end and a gas outlet end, the gas inlet end is connected with a gas outlet, the gas detecting chamber is internally provided with an oxygen sensor and a carbon dioxide sensor, the singlechip is connected with the oxygen sensor and the carbon dioxide sensor, the power supply is connected with the oxygen sensor, the carbon dioxide sensor and the heat radiating fan, and the PC terminal is connected with the singlechip. The invention further provides a method for online detecting the oxygen and the carbon dioxide in the biological fermentation tail gas. The device is simple in structure, strong in practicability, low in manufacturing cost, capable of continuously online operating for a long time, and capable of simultaneously completing online detection of contents of oxygen and carbon dioxide; the influence of the water in the tail gas is eliminated, and thus important respiratory metabolism parameters such as CER (Carbon dioxide Evolution Rate), OUR (Oxygen Uptake Rate) and RQ (Respiratory Quotient) in a fermentation process are obtained.

The invention provides an online measuring device for specific oxygen uptake rate (SOUR) of activated sludge in a sewage treatment system. The online measuring device is characterized by comprising a pre-aeration unit, an SOUR metering unit, a biomass metering unit, and a data control and calculation unit, wherein the pre-aeration unit comprises a first electric control valve, a first water pump, a second water pump, a pre-aeration tank and an aeration system, wherein the SOUR metering unit comprises a second electric control valve, a third electric control valve, an airtight breathing chamber, a dissolved oxygen meter and an electromagnetic stirrer, the biomass metering unit comprises a fourth electric control valve, a fifth electric control valve and an active micro-biomass online detection system, and the data control and calculation unit comprises a data acquisition card, a computer and a software program system. According to the online measuring device, the total active micro-biomass in the activated sludge system is adopted for replacing mixed liquor suspended solids (MLSS) or mixed liquor volatile suspended solids (MLVSS) in a conventional SOUR calculation method so as to accurately measure the SOUR of the activated sludge.

Systems and method are provided for monitoring a patient during surgery. An anesthetic machine includes a ventilator configured to provide breathable gas to a patient, an oxygen concentration sensor configured to monitor the concentration of oxygen in gas inhaled and exhaled by the patient, and a respiratory monitor configured to monitor a respiratory rate and a tidal volume of the patient. An uptake rate estimator is configured to estimate a pulmonary oxygen uptake rate (ViO2) for the patient from the concentration of oxygen in gas inhaled and exhaled by the patient and a minute volume of the patient. A risk score calculator is configured to determine a risk score for the patient at each interval as a function of the estimated ViO2 value. An output device is configured to provide the determined risk score to a human operator.

The invention discloses an optimization method of a fermentation process of salinomycin, and particularly relates to a process for producing salinomycin by glucose supplement and fermentation based on a metabolic parameter OUR (oxygen uptake rate). The fluid glucose supplement is processed when fermentation enters a thalli metabolism stationary phase, namely OUR stationary phase after sugar oil conversion is finished so as to reduce the 'glucose effect', so the valence of the product is improved, and the production cost is reduced at the same time. The process disclosed by the invention has a mature technology and is suitable for industrial large-scale production.

The embodiment of the invention provides an oxygen exposure control method and device in sewage treatment. The method comprises the following steps: collecting actual dissolved oxygen concentration inan aerobic tank, and computing the oxygen uptake rate OUR when the microorganism in the aerobic tank degrades an organic matter in the aerobic tank based on the actual dissolved oxygen concentration;computing the given aeration rate based on the OUR and the preset given dissolved oxygen concentration, wherein the given aeration rate is the aeration rate required by the microorganism in the aerobic tank to maintain the organic matter degradation in OUR and ensure that the dissolved oxygen concentration in the aerobic tank is maintained at the given dissolved oxygen concentration; and adjusting the current actual aeration rate as the given aeration rate. Through the scheme provided by the embodiment of the invention, the aeration rate can be precisely given into the aerobic tank, thereby maintaining the dissolved oxygen concentration in the aerobic tank as the given value, and then guaranteeing the sewage treatment efficiency and realizing precise control.