Recycle, Purge, and Bypass

#bioreactor-design

1.0

Equations

Dilution rate, HRT, and washout

D = \frac{F}{V} \qquad\qquad \text{HRT} = \frac{V}{F} = \frac{1}{D}

$D$ — dilution rate (how fast the reactor volume is being flushed and replaced with fresh feed), $\text{h}^{-1}$
$F$ — feed flow rate, $\text{L/h}$
$V$ — reactor (working) volume, $\text{L}$
$\text{HRT}$ — hydraulic retention time (average time a parcel of liquid spends in the reactor before it flows out — pure plumbing, no biology involved), $\text{h}$

01 formula