What is an uptake rate?
Uptake rate indicates the speed at which an organism takes in material from the medium. It is measured as the increase in concentration of material in the organism per unit of concentration in the medium per day.
How do you calculate oxygen uptake rate?
At steady state, the volumetric rate of oxygen uptake by the cells is equal to the volumetric rate of gas–liquid oxygen transfer, NA (Section 10.5. 2). Once NA is determined using Eq. (10.53), qO is found by dividing NA by the cell concentration x.
What is oxygen uptake rate?
The Specific Oxygen Uptake Rate (SOUR), also known as the oxygen consumption or respiration rate, is defined as the milligram of oxygen consumed per gram of volatile suspended solids (VSS) per hour.
What is OTR and our?
Under conditions of constant dissolved oxygen concentration, the OUR of the microorganism equals the OTR. 4. OUR is calculated by means of an oxygen mass balance around the reactor, and since OUR = OTR, OTR is quantified as a result. An oxygen mass balance around the reactor is conceptually defined in Equation 8.12.
How do you calculate maximum oxygen uptake?
Calculating VO2 Max
- VO2 max = maximum milliliters of oxygen consumed in 1 minute / body weight in kilograms.
- VO2 = (milliliters of air inhaled per minute)(percentage of oxygen in the air inhaled) / (milliliters of air exhaled per minute)(percentage of oxygen in the air exhaled)
- VO2 max = 15.3 x (MHR/RHR)
What is kLa in fermentation?
In submerged fermentation, four methods are available to estimate the overall oxygen mass transfer coefficient (KLa): the dynamic method, the stationary method based on a previous determination of the oxygen uptake rate (QO2 X), the gaseous oxygen balance and the carbon dioxide bal- ance.
How do you calculate kLa in Excel?
So, kLa=OUR/(C*-CL) and OUR is generally calculated as OUR=qO2*Cx. Therefore, kLa=qO2*Cx/(C*-CL), where qO2 is the specific oxygen uptake rate of oxygen and Cx is the biomass concentration.
What is kLa value?
kLa values generally increase as tip speed increases. However, tip speed is proportional to shear forces that can lead to cell death. Bioreactors, therefore, are designed with different impeller types, combinations, and locations to achieve target kLa values without creating these shear forces.
How do I calculate max heart rate?
You can estimate your maximum heart rate based on your age. To estimate your maximum age-related heart rate, subtract your age from 220. For example, for a 50-year-old person, the estimated maximum age-related heart rate would be calculated as 220 – 50 years = 170 beats per minute (bpm).
What is VO2 max formula?
The simplest formula to calculate VO2 max is VO2 max = 15 x (HRmax/HRrest). This method is considered to compare well with other common formulas. The units for VO2 max are milliliters of oxygen per kilogram of body weight per minute (mL/kg/min).
How do you calculate kLa?
If we assume steady state and no accumulation of oxygen inside the bioreactor, under such conditions OTR=OUR. So, kLa*(C*-CL)=OUR. So, kLa=OUR/(C*-CL) and OUR is generally calculated as OUR=qO2*Cx. Therefore, kLa=qO2*Cx/(C*-CL), where qO2 is the specific oxygen uptake rate of oxygen and Cx is the biomass concentration.