Prepared discussion of: Reducing the Fouling Rate of Surface and Waste Water RO Systems

摘要

In the beginning of the 1960's the first RO membrane was developed, which could be used economically to remove salts from water. It was made of cellulose acetate (CA), and has been improved through the years. In the late 1970's a thin film composite polyamide (PA) membrane, called FT30, was developed. It had a higher water permeability (lower operating pressure at the same permeate flux), and a lower salt permeability (a higher salt rejection) than CA membranes. The FT30 membrane and its clones soon became the predominant RO membranes. However, there are two areas where the CA membranes still have had an advantage over the FT30 type membranes; they tolerate chlorination for disinfection, and they are generally less fouling sensitive. The LFC membrane seems to combine the advantages with the FT30 type membranes with the fouling resistance of CA membranes.