bcdd51df_Facts_and_figures___SciDev_Net__Importance
[Product] Nanofiltration membrane [How it works] Membrane made up of polymers with a pore size ranging from 0.1 to 10nm [Developer] Saehan Industries, Korea [Importance] 
Field tested to treat drinking water in China and desalinate water in Iran, using this membrane requires less energy than reverse osmosis
Nanotechnology for clean water: Facts and figures - SciDev.Net
Importance