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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)
A rectangular block of material is subjected to stresses 65N/mm 2 (tensile) in x- direction and 35 N/mm 2 (tensile) in perpendicular direction. It is accompanied by shear stress
Tensile strength: What will be its ultimate tensile strength? Solution The condition for necking is = n = 0.3077 Hence using this value of , the true stress at ne
Q. Firing Rate Demand for Steam Generator? The firing rate for each Steam Generator is proportional to the feedwater flowing into that Steam Generator. Thus, the sum of the pa
For two waves period, determine the time response x(t) for the system (ignoring viscous damping effect only) Give=n: X0=0.09615 , θ(radians)=0.110*π , μk=0.80000 , μs=0.90000 , K=
(a) A four cylinder engine operates at 1200 rpm gave 18.6 KW brake power, the average torque when one cylinder was cut-off was 105 N-m. Evaluate the indicated thermal efficiency if
how to calculate machining time for milling operation
Types of Cooling System: Two types of cooling system are used in two wheelers. (a) Natural air-cooling. (b) Forced air-cooling.
Illustration of CAM A cam rotating at consisted angular velocity operates an oscillating follower. Draw cam profile for the given data: Angular displacement of the follower
Q. Application of hot service insulation? Provision for the expansion of hot equipment shall include the installation of expansion springs in circumferential banding securing i
Heat Treatment and Surface Treatment Processes Heat treatment processes are employed to improve of a work piece. The category includes the processes. Annealing, Normalizing,
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