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

In Flow

Biomass

Out Flow

Biomass Flowrate (kg/batch) Mass Comp % 2.9903

2.9903

0.0213

50 Conc. g/L 0.209987

494.02

In-Line

How it Works

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 $1,196 per unit, $859 per 3 Capital Cost for Unit: $ 1482 Operating per Batch: $ 286 Per Year: $ 7400