polishing filter jonas gerson and ian swyer. background definition: polishing filters… …are used...
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Polishing Filter
Jonas Gerson and Ian Swyer
Background
• Definition:
Polishing filters…“…are used to separate liquids only having very
small quantities of solid impurities…”
In this case to filter out the impurities from the output stream from a centrifuge
Process Situation
Flowrate (kg/batch) Mass Comp % Conc. g/LIn FlowBiomass 2.9903 0.0213 0.209987Out FlowBiomass 2.9903 50 494.02
How it WorksIn-Line T-Line
Design Selection• Need:
– Maximum flowrate of 27.7 L/min– Pore size of 0.2 µm
• Available Options– Companies: Pall, Millipore, MKS
• Need both disposable filters and housing
• It was found that 1 In-Line / T-Line filter housings using 10 inch disposable cartridge filters provide the best utility for the money
– The membrane areas were compared to the maximum flowrate needed, and compared against equivalent flux.
– Optimized for pressure drop and cartridge costs
Pressure Drop and Flowrates for Millipore SHF Filters
Suppliers and Prices
Final Design
2000 Cartridge Housing
Millipore Express SHF Cartridge Filter
$859 per 3
$1,196 per unit,
Capital Cost for Unit: $ 1482Operating per Batch: $ 286Per Year: $ 7400