Oxygen-transfer rates

Oxygen solubility Oxygen tents Oxygen transfer Oxygen transfer rate Oxygen transport Oxyhalide Oxyhemoglobin... [Pg.714]

Aerator type Materials of constmction Oxygen transfer efficiency, OTE, % Oxygen transfer rate, OTR, g/(W-h)... [Pg.340]

Oxygen transfer rate (OTR) is estimated by the foUowiag standard procedure (12), where the rate of mass transfer per unit volume of Hquid is taken to be directly proportional to the driving force of the system... [Pg.342]

The oxygen transfer rate for aerators is normally reported at standard conditions. Thus, ia order to make meaningful comparisons, the ORT under working or field conditions should be adjusted to standard conditions oxygen requirement for treatment (SORT) by means of... [Pg.342]

The SORT value when divided by the standard conditions oxygen transfer rate (OTR) given for a mechanical aerator yields the oxygen concentration required for treatment. [Pg.342]

As the oxygen transfer rate under steady-state conditions must equal oxygen uptake, K a may be calculated ... [Pg.2139]

Except as an index of respiration, carbon dioxide is seldom considered in fermentations but plays important roles. Its participation in carbonate equilibria affects pH removal of carbon dioxide by photosynthesis can force the pH above 10 in dense, well-illuminated algal cultures. Several biochemical reactions involve carbon dioxide, so their kinetics and equilibrium concentrations are dependent on gas concentrations, and metabolic rates of associated reactions may also change. Attempts to increase oxygen transfer rates by elevating pressure to get more driving force sometimes encounter poor process performance that might oe attributed to excessive dissolved carbon dioxide. [Pg.2139]

The oxygen transfer rate (OTR), or the rate at which oxygen is transferred from the gas to the liquid phase, must be a least equal to the peak oxygen load (OUR) at steady state, and can be determined from Equation 11-40 ... [Pg.871]

Oxygen transfer rate (OTR) The product of volumetric oxygen transfer rate kj a and the oxygen concentration driving force (C - Cl), (ML T ), where Tl is the mass transfer coefficient based on liquid phase resistance to mass transfer (LT ), a is the air bubble surface area per unit volume (L ), and C and Cl are oxygen solubility and dissolved oxygen concentration, respectively. All the terms of OTR refer to the time average values of a dynamic situation. [Pg.905]

Figure 4.11 Typical relationship between minimum oxygen-transfer rates and yield coefficients at various productivities (methanol as substrate).

Figure 7.4 The effect of viscosity on oxygen transfer rates. Adapted from Biochemical and Biotechnology Handbook. B Atkinson and F Mavituna, (Eds) 1991, Stockton press.

For slightly soluble gases, H is defined as a large value (4.2 X 104 bar mol-1 that is the mole fraction of oxygen in H20). The liquid phase controls, kL = Kv For the oxygen transfer rate, the interface area is important. For oxygen bubbles, the surface area of bubbles is defined as ... [Pg.25]

CASE STUDY OXYGEN TRANSFER RATE MODEL IN AN AERATED TANK FOR PHARMACEUTICAL WASTEWATER... [Pg.43]

The industrial wastewater used in the experiment is considered as having non-coalescing air electrolyte dispersion. Thus the equations discussed above would be used as a theoretical model for the estimation of oxygen transfer rate in the liquid phase, and compared with the experimental data obtained. [Pg.46]

Oxygen transfer rate (mass transfer coefficient). [Pg.160]

A 20 m3 working volume of a bioreactor is used for producting penicillin. What would be the sugar concentration (S0) you choose if oxygen transfer rate is not the limiting reactant Given data ... [Pg.166]

The simple equation for oxygen transfer rate is based on driving forces existing for the equilibrium value for oxygen concentration and the dissolved oxygen available in the liquid phase. That is ... [Pg.277]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...