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Careful consideration of the bioreactor agitation and aeration system is required in order to maintain a homogeneous environment and provide sufficient oxygen transfer rates to meet cellular metabolic requirements.
Both agitation and aeration need to be considered together as they have an influence on the mechanical design of the fermenter, the oxygen transfer characteristics of the vessel and its power requirements.
There are a number of components that contribute to the aeration and agitation system efficiency including the height/diameter ratio. These are:
i. the impeller system (marine, flat-blade turbine etc) ii. the baffles (can also provide additional cooling capability) iii. the air sparger (ring, cross orifice, porous, nozzle) iv. the drive seal (mechanical, magnetic)
An open-loop control system has the following state-space model: (a) Determine the characteristic equation for the open-loop control system. (b) Determine the characte
Evaluate force and moment: What force and moment is transmitted to supporting wall at A A force of 15 KN is transmitted to wall along with anticlockwise mome
Choke: This is incorporated in the main air passage and used to control the air quantity to supply rich mixture. While starting an engine, the choke shuts off the air supply to th
Compute amplitude and frequency of the particle: The displacement of a particle is described by x = 5 + 3 cos 3 t. Determine the position of the particle at t = 3 seconds. Com
Does the selected system meet the requirements of the application (building purging, make-up air, filtration, ventilation)? Is the system suitable for the intended building usag
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Q. Explain about Fired Heaters and Combustion Engines? Fired heaters and combustion engines shall normally be located at a safe distance from hazardous areas as they provide po
Aircraft Characteristics For planning and designing airport facilities, it is necessary to be conversant with the following important characteristics: (a) speed (b) size
Q. Vessels resting on concrete foundations? For vessels resting on concrete foundations, the allowable concrete bearing stress shall be 750 psi (5 MPa). The design loadings fo
‘coefficient of insensitiveness’ of governors
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