How to Select Modules
Key Point of Selection
- 1 -
Molecular Weight Cut Off
The types of substances that can be separated by a separation membrane depend on the pore size of the membrane.
Select membrane products according to the target substance since the manufacturer-specified nominal molecular weight cut-off is determined for each separation membrane.
Key Point of Selection
- 2 -
Module Types
The liquids that a separation membrane module can treat vary by type of module.
The flow path and resistance differ for each internal structure of the module. Accordingly, select a suitable separation membrane module according to the respective liquid properties.
-
Hollow Fiber
-
Tubular Type
-
Spiral Type
- ＊The graphs are simplified representations of characteristic tendencies according to the module type, which differ from individual product specifications.
Summary of How to Select Separation Membrane Modules
| Item | Hollow fiber module | Tubular type module | Spiral type module |
|---|---|---|---|
| Go to the product page | |||
| Applicable liquid properties | Low to medium viscosity, low to medium turbidity Acidic to alkaline |
High viscosity, high turbidity Acidic to mildly alkaline |
Low viscosity, low turbidity Acidic to mildly alkaline |
| Molecular weight cut-off （UF range） |
10,000～500,000 | 20,000～100,000 | ー |
| NaCl rejection rate （NF/RO range） |
ー | 70～90％ | 85～99％ |
| Typical applications | Purification and concentration in the food and chemical industries Bacteria and turbidity rejection in the water purification field Pyrogen removal in pharmaceutical water production |
Solid-liquid separation of activated sludge water Volume reduction of oil-containing wastewater Concentration in the food and chemical industries |
Pure water production in the artificial dialysis field Seawater desalination Purification and concentration in the functional food field |
