Bubble column bioreactors

An experimental study of gas void fraction in dilute alcohol solutions in annular gap bubble columns using a four-point conductivity probe

“…in the case of bubble column bioreactors, where salts, sugars and metabolic products, such as alcohols and organic acids are present in significant quantities in the culture medium (Schugerl et al, 1977;Jamialahmadi and Muller-Steinhagen, 1992). The addition of alcohol to the liquid phase has also been used to simulate the liquid phase behaviour in coal liquefaction and in bioreactors due to the presence of non-coalescing organic mixtures (Kelkar et al, 1983).…”

“…It is well known that the most significant difference between air-water and airaqueous solution systems is that, in the former, bubble coalescence rates are high, whilst, in the latter, the coalescence rates are low (Schugerl et al, 1977). The presence of relatively small amounts of alcohol increases the gas void fraction,  , in aqueous solutions in bubble columns (Camaras et al, 1999;Sijacki et al, 2009) by inhibiting coalescence.…”

New Approaches for Theoretical Estimation of Mass Transfer Parameters in Both Gas-Liquid and Slurry Bubble Columns

“…(1) (especially the numerical coefficient 6) is valid only for spherical bubbles (Schügerl et al, 1977). The formula for calculation of the interfacial area depends on the bubble shape.…”

Caracterización De Una Columna De Burbujeo

“…Esto se debe a que no hay suficiente información disponible sobre su operación y manejo (Schügerl, 1977).…”