In oxygen absorption process the presence of microbial cells in the liquid enhances the rate of oxygen absorption. Dissolved oxygen in the liquid is picked up by microbial cells and consumed in metabolic processes. However, many other possible pathways of oxygen transfer in fermentation systems have been described (Tsao & Kemp, 1960, Bennet and Kempe, 1967, Muchmore, 1971; Tsao, 1970). [...]
Mixing and agitation are used for blending of liquid. Mixing, actually, describes more precisely an operation in which two or more materials are intermingled to attain a desired degree of uniformity. Agitation on the other hand describes those operations by which turbulence in a liquid is promoted. Mixing and agitation find wide applications in microbial engineering processes. Depending on the [...]
A concept of emulsified oxygen vector pathway for enhanced oxygen mass transfer in bioprocessing liquid has been proposed. According to this concept, the presence of a non-aqueous liquid phase may provoke a significant increase in the oxygen transfer rate from the gas phase to the bio-cells without necessitating an increased energy input. The principle of oxygen vectors consists of adding [...]