Table 1. Membranes used for filtration of concentrated skim milk

Membrane code	10 kDa	30 kDa
Molecular mass cut-off (Da)	10,000	30,000
Membrane diameter (I.D/O.D)	0.9 mm/1.6 mm
Effective membrane area	0.14 m2
Membrane material	Polysulfone
Potting material	Urethane
Module case	Polyvinyl chloride (PVC)
Module diameter	Ø34 (25A)
Module length	320 mm (Approx.)
Filtration type	Cross-flow

I.D, inner diameter; O.D, outer diameter.