FIELD: methods of prevention and retardation of forming deposits on membranes. SUBSTANCE: used as inhibitor are mixtures of polyaspartic acids with emulsifying agent selected from group including alkyl sulfonates and alkoxylates. Polyaspartic acids are used in the amount of from 1 to 50000 part/million for starting aqueous solution. Average mass of polyaspartic acids ranges from 500 to 50000. They are uses as sodium salts. Used as emulsifying agents are linear alkyl sulfonates with 12-17 carbon atoms and polyethers on base of unsaturated and/or saturated alkonols with 10- 20 carbon atoms and 6-60 ethylene oxide components. Polyasparic acids and emulsifying agents are used in weight ratio of 1:99. Used as membranes are nanofiltering and ultrafiltering membranes or inverse- osmotic membranes with selective separating polyamide layer. Membrane processes are performed at pH ranging from 4.5 to 11. EFFECT: enhanced efficiency. 12 cl, 2 dwg, 3 ex
