OTR

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

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... 

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. 

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 ... 

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. 

Physiological effects of air pollution are deperrdent on dosage, the ability of the exposed organism to metabolize and excrete the pollution, and the type of pollutant. Many pollutants affect the futretiotring of the respiratory tract some change the structure and function of molecules others can enter the nucleus and turn getres otr or off atrd some cause chromosomal aberrations or mutations that result in cancer. 

In some cases, if necessary, a C(3)-regioselective addition of cuprate can be accomplished by the use of a sterically demanding protecting group - such as an -OTr or -OMMTr group - on C(l), as described in the synthesis of the polypropionate segment present in (-)-amphidinolide P and (+)-amphidinolide K [54]. 

Compare a) the minimum OTR and b) heat evolution rate of a continuous fermentation system based on n-alkanes operating at a dilution rate of 0.2 h 1 and a biomass concentration of 13.5 kg m 3, to a similar system based on carbohydrate. You may need to look back a few pages to get the relevant information concerning carbohydrate utilisation (Section 4.7). 

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