(1) to prevent fouling the membrane surface (including CaCO3, CaSO4, SrSO4, CaF2, SiO2, Fe and Al oxides, etc.);
(2) to prevent colloidal substances and solid particles suspended solids pollution blocking;
(3) to prevent contamination of organic material;
(4) to prevent microbial pollution blocking;
(5) to prevent the oxidation of substances on the oxidation of membrane
(6) to maintain stability in reverse osmosis water production plant.
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