04

rd geometry of a stirred tank bioreactor

Ratio    ( ęTo^j /J£ic ) :

Height of liquid in reactor to height of reactor w1ęo£o$Ł s>tu9A_s<ne.cz.v j>o UWLCoioi fi.BA^TotZA

H_L/H_t

Typical values Remarks

..... ~(17-0.8

Hf

Height of reactor to diameter of tank

IĆEĄ^tcJCA-

H_t/Dt

-1 -2

&

Diameter of impeller to diameter if tank iA&utCA 7o/LB(VY bo

2,e>(0

D_a/Dt

1/3 - 1/2

Depends on the level of foaming

Jw : GG Li

during the

fermetnation

European -reactors tend to be taller than those

designed in the USA

Rushton Turbinę reactors are generał ly 1/3 of the tank

diameter. Axial flow impellers are iarger.

&	Diameter of baffies to diameter of tank	Db/Dt	r- d 00 o d 0 1
w	Impeller blade height to diameter of impeller	W/Da	0.2
&	Impeller blade width to diameter of impeller	L/Da	0.25
a	Distance between middle of impeller blade and impeller bbde height	E/W	1

A tank^łs heightrdiameter ratio is often referred to as its aspect ratio.

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