In: Chemistry
Provide single word , or short sentence answers to the following ( no explanation , no equations ) .
1. What would be the expected separation factor for an ultrafiltration membrane separating proteins from liquid ?
2. What is the MWCO ?
3. If a cyclone is not achieving the desired cut size , the main way in which it is adjusted during operation is by altering ....
4. In membrane separations : what is the MSA ?
5. In a centrifuge : what is the ESA ?
6. The difference between thickening and clarification is that .... ( don't just copy from the notes please ; use your own words ) .
7. The terminal settling velocity of a solid , spherical particle is affected by its ( a ) mass , ( b ) density or ( c ) both mass and density .
8. Disk - bowl centrifuges are preferred to tubular bowl centrifuges in this application ..... ( name one ) for the follow ing reason : .....
9. A good general reference on separation processes is ....
Solution
1. Very high , or infinite
2. Molecular weight cut off ( the molecular weight which will be retained by the membrane at 90 % concentration in the retentate )
3. The underflow velocity ; then the entry velocity
4. The membrane itself
5. The energy to drive to the centrifuge , i.e. electricity
6. Clarification aims for a clear overflow , thickening aims for a highly concentrated solids in the underflow
7. Both mass ( via Dp ) and density
8. Beverage clarification for aseptic operation .
9. Perry's Handbook , or any of the other references that keep appearing in the course notes .