CHEE 450 March 30, 2009 Jeff DeMeza Blair Walker Richard Wong

 Removes particulates larger than a specified pore size from filtrate  Particulates accumulate as a filter cake  Batch operation  Flow properties change with time › Filtrate flux › Pressure drop

 Removes residual IBs, cell debris & biomass  Specifications › 1.25 hours filtration time, 23.3 kg filter cake/batch

3mm + 100% Safety Factor aste Permeate Filter A filter surface = 13.8 m 2

 Through Put  Pressure  Disposable

 Combined sterile filter and casing design  Dispose after each batch  Most expensive filter  Validation requirements are met  Low capital costs

 Disposable filter  Reusable Stainless steel casing  No contact of filtrate with casing  Casing does not need to be cleaned between batches  Initial validation required  Large initial capital cost of casing

Steel Casing and Disposable Filter Disposable Filter and Casing Capital Cost$50 000~$0 Cost of filter per batch $2 500$3 900 Total cost for year 1 $ $

Note: does not include validation costs

 Produced by Pall > ~ $2500 / batch > Area surface = 14m 2 > P = 3.5 bar > Pore size = 0.2  Quattro Flow pump manufactured by Triangle Process Equipment