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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)
Describe the key terms i. Write two differences between boiler and turbine. ii. Compare the rankine cycle with carnot cycle in terms of efficiency and work ratio iii.
Two insulated and identical tanks are filled with nitrogen. One tank is at 1 bar, 250 o C and the other is at 5 bar, 25 o C. If the two tanks are connected with a pipe and the v
Evaluate the normal and tangential stresses: Q. 20: At the point in stressed body, the principal stresses are σ x = 80 kN/m 2 and σ y = 40 kN/m 2 . Determine the norma
I have a project due in 20 hours and I need help please.
offset method to draw parabola
F AC T OR S AFFECTING THE SELECTION OF BOILER: - Working Pressure and amount of steam needed. - Floor area required. - Operating and Maintenance Required
Three basic types for microbial systems: Porous, nozzle and orifice Porous sparger Laboratory operation, usually constructed from sintered glass or metal. Disadvantages a
About zeroth law of thermodynamics
EXPALIN PREPARATION OF LYOPHILIC AND LYPHOBIC SOLS
Q. Soil conditions for plant layout? Soil conditions affect the foundation requirements, drainage, type of substructure used and may limit the size and shape of the facility. T
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