lecture notes-growth kinetics-3-heat evolution

Lecture - amounts of heat released 1/Y H Glucose 2.38 kcal/g cell produced ethanol 5.55 kcal/g cell produced Methanol 8.33 kcal/g cell produced

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Batch Growth Heat generation by microbial growth For actively growing cells, the maintenance requirement is low, and heat evolution is directly related to growth . The heat of combustion of the substrate is equal to the sum of the metabolic heat and the heat of combustion of the cellular material. H S X Y c H Y s H 1 / + = s H Is the heat of combustion of the substrate (kJ/g substrate) S X Y / is the cell mass yield per substrate consumption (g cell/g substrate) c H is the heat of combustion of cells (kJ/g cells) H Y 1 is the metabolic heat evolved per gram of cell mass produced (kJ/g cells)
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Batch Growth Heat generation by microbial growth Re-arrange the above equation: The higher degree of oxidation of the substrate has lower
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Unformatted text preview: amounts of heat released: 1/Y H Glucose: 2.38 kcal/g cell produced ethanol: 5.55 kcal/g cell produced Methanol: 8.33 kcal/g cell produced Methane: 16.34kcal/g cell produced c H Y s H Y S X H ∆-∆ = / 1 Batch Growth Heat generation by microbial growth c H Y s H Y S X H ∆-∆ = / 1 The total rate of heat evolution in a batch fermentation Q GR is H net L GR Y X V Q 1 μ = X is the cell mass concentration (g/L); L V is the liquid volume (L) (kJ/h) Heat removal : by circulating cooling water through a cooling coil or cooling jacket in the fermentation....
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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 - amounts of heat released 1/Y H Glucose 2.38 kcal/g cell produced ethanol 5.55 kcal/g cell produced Methanol 8.33 kcal/g cell produced

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