A critical review and experimental verification of the correct use of the dynamic method for the determination of oxygen transfer in aerated agitated vessels to water, electrolyte solutions and viscous liquids

摘要: Abstract Inconsistencies are frequently observed in data for the volumetric mass transfer coefficient oxygen kla obtained by various dynamic methods. The reasons this phenomenon critically reviewed. On basis of our own experimental water, solutions electrolytes, glycerol and carboxy-methylcellulose, methods compared with result that only one variant gives correct results over a wide range power dissipated per unit volume. In variant, pure is introduced as step input to batch freed from any dissolved gas e.g. vacuum desorption. All method agree those measured steady state sulphite conform simple relation form ∼ en1. decrease slope n1 log(kla) vs. log e plot, or even increasing at higher values, reported number researchers, merely incorrect techniques used measurement.