Gassed power fermenter

Gas seal system, blast furnace, 14 507 Gassed power draw, during fermentation, 11 39 0... 

Calculate mass transfer, gas hold up, gassed and ungassed power for the fermenter with the given data ... 

Taguchi and Miyamoto (1966) showed that for non-Newtonian fermentation broth, the power requirement in the turbulent flow regime was well correlated by the above correlation of Michel and Miller (1962). Broth from the production of gluco-amylase by Endomyces species and carboxymethyl-cellulose solutions were used as non-Newtonian fluids. For non-Newtonian fluids in laminar and transition regions, particularly for fluids with apparent viscosities greater than 300 cP, the impeller diameter and impeller blade width had considerable effects on power consumption in a non-gassed system. They proposed... 

The Prochem Hydrofoil stirrer shown in Fig. 1.13 exhibited a much improved pumping effect over conventional turbine stirrers, which makes them more efficient particularly for gas/liquid mass transfer in viscous material systems (e.g. fermentation with micelles). Pilot plant experiments (D = 0.8 m) in ungassed liquids at Re > 2 X 10 yielded Ne = 6.5 for the classical turbine stirrer and Ne = 1.1 for the Hydrofoil stirrer [150]. The power loss due to gassing, the Ne(Q) dependence, was found, however, to be identical for the two stirrer types. 

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