Stoichiometric equations are used to represent growth of microorganisms provided a ' molecular formula' for the cells is available. The molecular formula for biomass is obtained by measuring the amounts of C, N, H, O and other elements in cells. For a particular bacterial strain, the molecular formula was determined to be C4.4H7.30 1.2N0.86 . These bacteria are grown under aerobic conditions with hexadecane (C16H34) as substrate. The reaction equation describing growth is:

                             

You have been put in charge of a small fermenter for growing the bacteria and aim to produce 2.5 kg of cells for inoculation of a pilot-scale reactor. What minimum amount of hexadecane substrate must be contained in your culture medium? 

#Question id: 14175

#Section 5: Bioprocess Engineering and Process Biotechnology

The growth of S. cerevisiae on glucose under anaerobic conditions can be described by the following overall reaction

Determine the biomass yield coefficient YX/S? 

#Question id: 14176

#Section 5: Bioprocess Engineering and Process Biotechnology

 The growth of S. cerevisiae on glucose under anaerobic conditions can be described by the following overall reaction

Determine the product yield coefficient YEtOH/S 

#Question id: 14177

#Section 5: Bioprocess Engineering and Process Biotechnology

The growth of S. cerevisiae on glucose under anaerobic conditions can be described by the following overall reaction

Determine the product yield coefficients YCO2/S 

#Question id: 14178

#Section 5: Bioprocess Engineering and Process Biotechnology

#Question id: 14179

#Section 5: Bioprocess Engineering and Process Biotechnology

The growth of S. cerevisiae on glucose under anaerobic conditions can be described by the following overall reaction: 

Determine the coefficient R. 

#Question id: 14180

#Section 5: Bioprocess Engineering and Process Biotechnology

Aerobic degradation of benzoic acid by a mixed culture of microorganisms can be represented by the following reaction.

                Determine a, b, c, d, and e if RQ = 0.9.