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A fermentation reactor is charged with a sterile feed of growth media at 35 °C and inoculated with a batch of microorganisms. The batch is allowed to grow for 10 days. During the growth period the temperature is maintained at 37 °C by circulating cold water through a jacket on the vessel. Sterile air is spared into the fermenter to maintain a desired dissolved oxygen concentration. The pH of the fermenter is controlled by periodic addition of a dilute solution of sodium hydroxide. At the end of the growth period the batch is discharged from the reactor to the harvesting section of the process.
a. Sketch a P&I diagram of the reactor and feed section.
b. What pressure would you choose for operation of the fermenter, and how would you control it?
What is element X? Propose a name for H2X? To completely neutralize a sample of H2X, 35.6 mL of 0.175 M OH solution was required. What was the mass of the H2X sample used?
The value of the product is $14.08 per pound, and the plant operates 300 days per year. Assuming no costs are involved other than those mentioned, what is the maximum annual profit that can be obtained under these conditions?
Technical specialists at the company have flagged part of an internal calculation by a junior engineer as potentially erroneous. The excerpt is given below. Please prepare a brief memo for our Quality Assurance department describing the errors and pr..
A gas present in a cylinder fitted with a frictionless piston expands against a constant pressure of 1 atm from a volume of 2 liters to a volume of 6 liters. it absorbs 800 j heat from surroundigs .determine increase in internal energy of process.
Make a practice HAZOP study of the plant section and add any instrumentation that is needed to develop the full P and I diagram.
The pressure is 1 bar, the relative humidity is 75%, and the dew temperature is 25 °C. What is the mol fraction of water vapor in the air?
3.5 Calculate the reactor volumes required to process I043 liter/min of 3 molar .4 in the aqueous reaction A -+ 2B for PFTR and CSTR reactors. (a) 90% conversion, k 2 min-I (b) 99% conversion, k = 2 mole liter-' min-(c) 99.9% conversion, k 2 mole lit..
Implement a traffic light controller FSM with a state encoding where GNS=00, YNS = 01, GEW = 10, and YEW = 11. Show Karnaugh maps for the next state variables and output variables and a gate level schematic for the FSM.
For honey, which is Newtonian, the plot should be linear with the slope equal to the viscosity. Calculate the viscosity (or let Excel do it for you). Do a little Google or literature searching and see if you can find a value for the viscosity of h..
Example introduced a heat exchange system revamp problem. If the plate heat exchanger E101 in Figure 2.19 is the gasketed-plate type, then the exchanger area can be increased by adding plates to the exchanger. How much additional area must be adde..
In a specific rectification process , operating on ethanol and water mixtures, the vapor and liquid streams entering and leaving the column are those given in the table ethanol water mole% moles liquid entering top 75.1 24.9 liquid leaving bottom ..
Suppose the value of 25 is changed to 10 in the equation, defining am and a current pulse of 10mA (hyperpolarizes the membrane) is passed through the membrane of a squid giant axon for a very long time. At time t¼0, the current pulse is removed. S..
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