Membran E is a liquid detergent based on enzymes for the detergency of all kinds of membranes utilized in food industries, dairy sector, beverage bottling, to be always used together with the alkaline formulations of the “Membran range”. Membran E is able to facilitate the removal of the organic matter in general and of the strongest protein components, with the settling down of limestone and the improvement of the cleaning effectiveness and the production efficiency. Membran E can be used both for extraordinary washing interventions for the recovery of the permeability optimal levels and for routine treatments, always combined with alkaline detergents.