lecture notes-growth kinetics-2-oxygen supply for growth

lecture notes-growth kinetics-2-oxygen supply for growth -...

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Batch Growth Kinetics Effect of factors: aerobic growth is more efficient. - Dissolved oxygen (DO) - aerobic fermentation requires oxygen - oxygen gas is sparingly soluble in water - specific growth rate may be limited by DO if DO is below a critical oxygen concentration. Critical oxygen concentration : the growth rate becomes independent of DO concentration. bacteria and yeast: 5%-10% of the saturated DO mold: 10%-50% of the saturated DO The saturated DO in aqueous solution is 7 ppm at 25 o C and 1 atm.
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Batch Growth Kinetics Effect of factors: - Dissolved oxygen (DO) The rate of oxygen transfer (OTR) from the gas to liquid phase is given by: OTR = No 2 = K L a (C*-CL) K L is the oxygen transfer coefficient (cm/h), a is the gas-liquid interfacial area (cm 2 /cm 3 ) K L a is the volumetric oxygen transfer coefficient (h -1 ) C* is saturated DO concentration (mg/l); C L is the actual DO concentration (mg/l); No 2 is the rate of oxygen transfer (OTR) (mgO 2 /l.h)
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Batch Growth Kinetics Effect of factors:
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This note was uploaded on 02/13/2012 for the course CHM 3210 taught by Professor Kennell during the Fall '11 term at University of Florida.

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lecture notes-growth kinetics-2-oxygen supply for growth -...

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