1. Jonas Gerson and Ian Swyer
Polishing Filter
Jonas Gerson and Ian Swyer

2. 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

3. Process Situation

4. How it Works
In-Line
T-Line

5. Design Selection Need: Available Options
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

6. Pressure Drop and Flowrates for Millipore SHF Filters

7. Suppliers and Prices Final Design 2000 Cartridge Housing
Millipore Express SHF Cartridge Filter
Suppliers and Prices
Final Design
$1,196 per unit,
$859 per 3
Capital Cost for Unit: $ 1482
Operating per Batch: $ 286
Per Year: $ 7400