✦ LIBER ✦

Mixing times in an external-loop airlift bioreactor with static mixers

✍ Scribed by M. Gavrilescu; R.-V. Roman

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 463 KB
Volume: 16
Category: Article
ISSN: 0138-4988
DOI: 10.1002/abio.370160208

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✦ Synopsis

The influence of static mixers on mixing time and circulation time in an external-loop airlift bioreactor with gas-induced and forced-liquid circulation was investigated. The study was camed out with water and three viscous, non-Newtonian starch solutions. The mixing time was determined for the overall flow loop using a classical tracer response technique. It was found that the mixing time is highly dependent on the superficial gas velocity and the presence of static mixers. The shortest mixing time is achieved in a forced-loop airlift reactor without static mixers, where the average mixing time value is only '13 of the time necessary for mixing in the airlift reactor with gas-induced liquid circulation and static mixers. The pseudoplasticity of the liquid phase insignificantly influences the mixing time and the circulation time.

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