Preparation of Thin Film Composite (TFC) Charged Nanofiltration (NF) Membranes
This technology refers to a novel process for preparation of Thin Film Composite (TFC) charged nanofiltration (NF) membranes containing surface negative charge in the form of fixed sulfonic acid ( -SO3-H+) groups. This has tremendous potentials for applications in domestic water treatment, aqueous stream separations and other areas like pharmaceuticals and bio technological industries, downstream processing, food and beverage industries, dairy industry, waste water treatment.
Salient Features
- The flat sheet membranes give a unique performance in terms of solute rejections.
- These are particularly suitable for management of hardness (Ca and Mg containing solutes) and partial salinity in water for production of potable water as well as water for industrial purposes.
- Membranes of a range of performances, according to the need of any application, can be prepared by variation of chemical compositions.
Applications
- Water purification, particularly for production of drinking water by removal of hardness and partial removal of salinity from moderately brackish water.
- Removal of heavy metal impurities.
- Fractional separation of mixed systems containing monovalent and multivalent ions.
- Applications in aqueous stream separations in pharmaceutical, food and beverage industries, dairy industry, waste water treatment, etc.
