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1 disk stack centrifuge daniel, emily, etienne presented by

2 the outline purpose of centrifugation types of centrifuges properties disk stack centrifugation how it works equipment parts design considerations our design cost estimation questions and answers of our presentation

3 meeting the challenge a key role in many industrial processes, including the production of insulin, is to separate liquid phases and solids from each other centrifugation can be utilized to separate the cellular debris from the released protein purpose of the centrifugation

4 many fish in the sea types of centrifuges decanter centrifuge disk stack centrifuge

5 one of a kind properties of the disk stack centrifugation ideal for a wide range of separation tasks that involve particle (biomass) size – 1.5 microns biomass percentage – 0.6% total solid percentage % process! lower solids concentrations smaller particle sizes

6 working principles how a disk stack centrifuge works separates solids and liquid phases in a continuous process uses extremely high centrifugal forces denser solids are forced outwards against the solid bowl wall less dense liquid phases form concentric inner layers inserting special plates provides additional surface settling area

7 working principles how a disk stack centrifuge works

8 the whole is the sum of parts parts of the disk stack centrifuge inlet zone reduces shear forces and amount of foaming increases and avoids disturbances of the separation processes occurring in the bowl liquid discharge section important that oxygen pick-up is kept to a minimum temperature increases in the liquid must be avoided to prevent problems later in the process solids discharge section remove solids by continuous solids discharge, intermittent solids discharge or manual removal

9 the whole is the sum of parts parts of the disk stack centrifuge disk stack area heart of the centrifuge key to good separation performance lies in the efficiency of the disk stack layout and design of the distribution holes ensure that the process flow is evenly spread among all the disks

10 keys to exceptional performance design considerations efficiency depends on solids volume fraction sedimentation area rotational speed efficiency can be improved if particle diameter is increased (coagulation, flocculation) residence time distance for sedimentation

11 keys to exceptional performance design considerations desirables high centrifuge speed large particle size large density difference between solids and liquids large radius small viscosity

12 our very own our design solid wall continuous liquids discharge batch manual solids discharge throughput density difference liquids viscosity sedimentation area disk diameter height speed G motor power number of disks L/min cP 35 m m 0.16 m rpm hp 120

13 time for shopping cost estimations disk stack centrifuge technology meticulous control, low cost and high reliability unit cost $ CAD installation cost $ CAD

14 he said, she said references pictures websites books Belter P.A., Cussler E.L., Hu W.S. Bioseparations : downstream processing for biotechnology. New York : Wiley, Lydersen B.K., DElia N.A.., Nelson K.L. Bioprocess engineering : systems, equipment and facilities. New York : Wiley, Perry, R.H.; Green, D.W. (1997). Perry's Chemical Engineers' Handbook (7th Edition). McGraw-Hill.

15 thank you! questions?


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