| |
Channel size |
Cross-flow velocity |
Reynolds number |
Cleanability |
Surface area to volume ratio |
Liquid hold-up |
Energy consumption |
|
Tubular |
Large |
2-6 m/s |
>104 |
Easy to clean
(Membrane replacement is simple) |
Low |
High |
High |
|
Hollow fibre |
Narrow |
0.5-2.5 m/s |
500-3000 |
Easy to clean
(high membrane cost) |
High |
Low |
Low |
|
Spiral wound |
Narrow |
0.5-1.5 m/s |
500-1000 |
Reasonably economic
(membrane can collapse) |
High |
Low |
Low |
|
Flat sheet |
Open/
narrow |
2-3 m/s |
>104 |
Easy to clean (Membrane replacement is simple) |
Low |
moderate |
moderate |
| Vibrating Membrane |
Open/ Narrow |
2-3 m/s |
>104 |
Easy to clean but Membrane replacement is difficult |
Low |
moderate |
High |
