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The function of the impellers is to: (i) reduce bubble size thereby increasing the surface area for oxygen transfer, and (ii) maintain a uniform environment, nutrient supply and heat removal. The choice of impellers depends on: (i) type of fermentation and organism, (ii) impeller design, (iii) power input and (iv) mixing efficiency. Some typical impeller designs are shown below.
The ratio of the bioreactor tank:impeller diameter (Di/DT) is normally in the range 0.33 - 0.5. For radial flow impellers the diameter tends to be closer to 0.33 of the tank diameter and for axial mixers the diameter tends to be slightly larger. The location of the impellers is determined by geometric and mixing considerations.
First impeller: 0.33 - 0.5 tank diameter from base
Spacing: 1 - 2 impeller diameters (or 1 tank diameter)
Final impeller: 1 - 2 impeller diameters from the aerated liquid surface
Consequently consideration of the liquid level during the process needs to be taken into account, i.e. broth volume will increase with aeration and volume will increase in a fed-batch process.
Find distance of which wagon will travel before coming rest: A train of wagons is first pulled on level track from A to B and then up a 5 percent upgrade as shown in the figur
explain about pnp transistor
What type of low lube oil security recommended for API612 steam turbines.(Electronic/Mechanical). Please give refrences
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Context Level Data Flow Diagram In this section, the cell control model conversation in the former section is demonstrated by the data flow diagram as in following figure of co
velocity acceleration by relative method and intentan methodto be showed graphical on it?
Bench Vices: Bench vice is used to hold a job on a bench. It consists of a movable jaw, a fixed jaw, spindle and a lever. Figure shows a bench vice. The movable jaw is in the fron
Work done - thermodynamics: A free expansion process is a process in which system expands freely without experience any resistance. I.E. is constant at the time of state chang
Q. What are the Specific Issues with plant Layout? There are a large number of regulations and related material that impact the operating plant. API (American Petroleum Institu
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