The invention relates to a method for reducing water consumption of a system (1) for processing a liquid or semi-liquid food product, after an interruption of said processing. The food product is a composition of a first sub-composition having a low concentration and a second sub-composition having a high concentration, wherein said high concentration is greater than said low concentration. The method comprising the steps of pushing said first sub-composition, said second sub-composition and said food product out of the system (1) using water until the system (1) substantially contains only water, sterilizing the system (1) by heating the water present in the system (1), and forming a new food product by adding a new second sub-composition to the sterile water, thereby using said sterile water as said first sub-composition.
