ANTISCALANT AND SCALE INHIBITION METHOD FOR REVERSE OSMOSIS MEMBRANES

摘要

Provided are an antiscalant and scale inhibition method for osmotic membranes, which are capable of preventing the adhesion of calcium carbonate scale that is generated in osmotic membrane treatment without increasing the phosphorus concentration in the wastewater, and which do not generate minute deposits of gels, etc. An antiscalant having a non-phosphorus-containing water-soluble maleic acid polymer, which has a mass average molecular weight of 1.2 x 10³ to 1.8 x 10³ and comprises 50 mol% or more of maleic acid units, as the main component is added to the reverse osmosis membrane water treatment system. When doing so, for example, polymaleic acid, a copolymer of maleic acid with isobutylene, a terpolymer of maleic acid, ethylacrylate and vinyl acetate, etc. is used as the water-soluble polymer.