Nanofiltration (NF) is a de novo class offiltrations with unique properties ranging from ultrafiltration to reverse osmosis. This Special Issue on “Nanofiltration Membranes: Recent Advances and Environmental Applications” of the Membranes seeks to include but is not limited to recent progress in emerging NF membranes fabrication and modification, polymeric and ceramic , is well suited for environments where the corrosion resistance at competitive prices is required.The inherent characteristic of wood being strong and flexible provided the perfect material for early designs.There were problems however as wood can easily be damaged by woodpeckers, dust and stones, and even rain causing the to swell leading to severe vibrations from an out of balance rotor system.When the RO system is working or there is pressure in the frp , it is strictly prohibited to knock, disassemble or move the membrane housings. In order to ensure the inner surface of the fiberglass membrane housing clean, use a neutral cleaning solution to clean. It is strictly forbidden to use concentrated hydrochloric acid, concentrated sulfuric acid, etc. as cleaning fluid.