—The analysis of the influence by the impeller type
in a stirred hybrid airlift bioreactor was performed in relation
to the gas holdup, and mass transfer. The comparative study
was performed using three-bladed marine and Lightnin A310
(axial flow impellers), and six-bladed Rusthon turbine and
six-bladed Smith turbine (radial flow impellers). The
experiments were conducted using distilled water at 250C and a
constant rotation velocity of 800 rpm, as well as in the absence
of agitation (airlift mode); the superficial gas velocity varied
from 0.0157 to 0.0262 ms-1. The gas holdup and oxygen transfer
coefficient was higher with the use of radial impellers; however,
the mechanical power input required while using radial
impellers is 730-1400% higher than with axial impellers.
—Axial Impeller, hydrodynamics, mass transfer,
radial impeller, stirred airlift bioreactor.
S. S. de Jesus, A. Santana and R. Maciel Filho are with the School of
Chemical Engineering, University of Campinas, Campinas, CP 6066 Brazil
(tel.: 55-19-3521-3958; fax: 55-19-3521-3965; e-mail: firstname.lastname@example.org).
Cite: Sérgio S. de Jesus, Aline Santana, and Rubens Maciel Filho, "Hydrodynamic and Mass Transfer Study in a Mechanically
Stirred Hybrid Airlift Bioreactor Based on Impeller Type," International Journal of Chemical Engineering and Applications vol. 5, no. 1, pp. 41-45, 2014.