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20160419 Wageningen UR – Deterministic Ratcheting for Fractionation of Suspensions

Last updated 876 days ago by Albert Verver

Group of Users of Technology for Separation in the Netherlands


20160419 Wageningen UR – Mr. Jaap Dijkshoorn; Maarten Schutyser – “Deterministic Ratcheting for Fractionation of Suspensions”

The Food Process Engineering Group at WUR has developed ratcheting to a workable process for separating more or less rigid suspended particles. In ratcheting particles with a smaller diameter follow the liquid flow around the obstacles while larger ones move away from it. The solids density is similar to that of the liquid. The suspension has to stay below a concentration where particles interact and Reynolds should be in the laminar regime, where higher flowrates improve separation. 35 µm can be separated from 105 µm. Target is 5 µm. Pressure drop distribution is critical.

Design rules need to be derived with focus on large scale application. Bench scale design is underway. The use of sieves (Veco) mimicking obstacles leads to higher capacities. www.wur.nl


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