Sep 12, 2014
41. Which compounds are stable to Dow FILMTEC membranes?Membrane stability depends on many factors, such as temperature, pressure, concentration, pH, trace organic minerals (oils), bacteria, oxidants,...
Sep 12, 2014
The molecular formula of water is H₂O, with a relative molecular weight of 18.015. Hydrogen makes up 11.9% of the water molecule, and oxygen makes up 88.81%.Water salinity: also known as mineralizati...
Sep 12, 2014
Phase Inversion Method for Ultrafiltration MembranesCurrently, most commercially available ultrafiltration membranes are prepared using polymer materials via the phase inversion method. Commonly used ...
Sep 12, 2014
I. Quartz stone has a silica content of 98.5% or higher; silica stone with a silica content below 98.5% is called silica.II. Quartz stone, after being crushed, is called quartz sand. Quartz sand is cl...
Sep 12, 2014
51. How to replace older nanofiltration (NF) membrane elements in a system with larger product water tubing from the newer series NF90-400, NF270-400, and NF200-400 nanofiltration elements?You can pla...
Sep 12, 2014
Magnetization: The treatment of water using the effect of a magnetic field is called water magnetization.Mineralization: This refers to adding beneficial minerals to clean water. It is particularly im...
Sep 12, 2014
Composite ultrafiltration membranes, also known as asymmetric composite membranes, are fabricated by depositing an extremely thin, dense layer onto a microporous support layer through physical casting...
Sep 12, 2014
61. Which product should I choose when replacing an NF255-400?NF270-400 is the most suitable.62. Can I buy Dow wet membrane elements?Yes, but most Dow FILMTEC elements are dry membrane elements. It...
Sep 12, 2014
71. Oil or other hydrophobic substances are harmful to membranes, so why can silicone grease be used as a lubricant?This is because the high viscosity of Dow Corning 111 prevents these substances from...
Sep 12, 2014
Sterilization and Disinfection: Water disinfection methods can be divided into chemical and physical methods. Physical disinfection methods include heating, ultraviolet (UV) light, and ultrasound; che...
