Inhibition and delay of deposit formation in membrane processes

Process for carrying out the treatment of an aqueous feed using at least one membrane, wherein the aqueous feed contains inorganic and organic scale forming ingredients and the process inhibits or delays scale formation on the at least one membrane, comprising adding polyaspartic acids in a mixture with surfactants or emulsifiers to the aqueous feed in an effective amount to inhibit or delay scale formation by the inorganic and organic ingredients, the polyaspartic acids mixture being used in an amount of 1 to 50,000 ppm, based on the aqueous feed.