5. Air-lift bioreactors are similar to bubble column reactors, but differ by the fact that they contain a draft tube. The draft tube is always an inner tube (this kind of air-lift bioreactor is called...

Extracted text: 5. Air-lift bioreactors are similar to bubble column reactors, but differ by the fact that they contain a draft tube. The draft tube is always an inner tube (this kind of air-lift bioreactor is called "air-lift bioreactor with an internal loop), fig. 4 illustrates the basic structure of an air-lift bioreactor with an internal loop. Direction of Liquid flow Air bubble Draft tuhe (mner fube) Perforated plate Compressed ur fig. 4 The circulation of the fermentation broth (average density p, and average viscocity : 4) is being maintained by injecting compressed air (pressure : Pir and volume flow rate : Qir) via a perforated plate (radius of openings : r), located just at the bottom of the central draft tube. As a potential Chemical Engineer you are asked to calculate the rate of circulation (volume flow rate) of the fermentation broth. State your assumptions clearly and assume any missing data if necessary. Please Turn Over