To purify the domestic water with respect to microorganism, colour, odour, suspended solids and organics.
Briefly, the process involves preparation of a membrane casting solution consisting of basic polymer, selected additive and solvent, and then coating of a polymeric film from this solution on a porous support by phase inversion process. Rest of the things are simple assembly of this membrane filter in appropriate housing etc.
All the raw materials like polysulfone polymers, additives and solvents are produced within the country and are available in local market.
A small room with window air-conditioner/dehumidifier is needed to coat ultrafiltration membrane unit. All the steps in the presented technology are manual in nature and hence does not require electrical power for process. Constant source of water is needed to produce and test the membrane device.
One Chemist and one technician to observe the process and two skilled workers would be adequate to produce about 25 water purifiers per day.