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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?
If the capital costs in the adipic acid example described in Example 9.5 are known to within -10% to +30%, and the cash flow from operations is predicted within ±10%, estimate the mean and standard deviation of the 10-year NPV. Is there a greater ..
What is the order of the overall transfer function, G(s) = V(s)/U(s)? (b) What is the gain of G(s)? Under what condition(s) is the process gain negative?
Volume of Air Required for Combustion of a Natural Gas Mixture, A natural gas has the following analysis by volume:
Develop a series of design graphs that can be used to demonstrate acceptable combinations of tubes dimensions
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Five different batches of a commercial plastic are sampled to determine the variation of inert additives between batches. Since each batch consists of several thousand pounds of material, several samples are taken from each batch to determine the ..
question 1a describe the main purpose of the globally harmonised system of classification and labelling of chemicalsb
Consider the accompanying diagram. Ball A is allowed to fall and strike ball B. Assume that all of ball A's energy is transferred to ball B, at point I, and that there is no loss of energy to other sources.
Develop a project plan and schedule of tasks for each engineer. Be sure to allow sufficient time for equipment sizing, costing, and optimization. What intermediate deliverables would you specify to ensure that the project stays on track?
Write a comprehensive report about HT Nitriding of the form of corrosion, the report include and discerption of the corrosion form
Determine the temperature and phase of water from the following information. If the phase is a vapor-liquid mixture, report the fraction of vapor and liquid.
A sinusoidal signal, with amplitude of 3.25 volts, is applied to a uniform quantizer of the mid-tread type whose output takes on the values 0, ±1, ±2, ±3 volts. Sketch the waveform of the resulting quantizer output for one complete cycle of the in..
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