💧What is SDI? Silt Density Index (SDI) is a measure of the fouling potential of feed water, especially important for RO membrane protection. It estimates how much particulate matter (silt, colloids, bacteria, etc.) would clog a 0.45 µm filter over a standard time. The SDI was introduced by ASTM as a standard fouling index to address the growing need for a reliable … [Read more...]
Overview of Pretreatment in Desalination Plants
Introduction to Pretreatment in Desalination Pretreatment refers to all the physical, chemical, and sometimes biological processes applied to the feedwater before it enters the main desalination units (such as RO membranes or thermal flash evaporators). The main objective is to remove contaminants—such as particulates, colloids, microorganisms, dissolved organics, and … [Read more...]