#Question id: 14165
#SCPH05 I Biotechnology
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:
Assuming 100% conversion, what is the yield of cells from oxygen in g g-l?
#Question id: 14166
#SCPH05 I Biotechnology
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: 14167
#SCPH05 I Biotechnology
Corn-steep liquor contains 2.5 % invert sugars and 50% water; the rest can be considered solids. Beet molasses containing 50% sucrose, 1% invert sugars, 18% water and the remainder solids, is mixed with corn-steep liquor in a mixing tank. Water is added to produce a diluted sugar mixture containing 2% (w/w) invert sugars. 125 kg corn-steep liquor and 45 kg molasses are fed into the tank.
How much water is required?
#Question id: 14168
#SCPH05 I Biotechnology
Corn-steep liquor contains 2.5 % invert sugars and 50% water; the rest can be considered solids. Beet molasses containing 50% sucrose, 1% invert sugars, 18% water and the remainder solids, is mixed with corn-steep liquor in a mixing tank. Water is added to produce a diluted sugar mixture containing 2% (w/w) invert sugars. 125 kg corn-steep liquor and 45 kg molasses are fed into the tank.
What is the concentration of solids in the final mixture?
#Question id: 14169
#SCPH05 I Biotechnology
Unsweetened condensed milk is a shelf-stable canned milk product. If 100kg of fresh milk, containing 87% water and the rest milk solids, is condensed using an evaporator to remove 60% of the water from the fresh milk, calculate:
The mass of water evaporated
#Question id: 14170
#SCPH05 I Biotechnology
Unsweetened condensed milk is a shelf-stable canned milk product. If 100kg of fresh milk, containing 87% water and the rest milk solids, is condensed using an evaporator to remove 60% of the water from the fresh milk, calculate:
The final mass and composition of condensed milk produced