METHOD OF FILTRATING LIQUID, AND FILTRATION APPARATUS FOR FILTRATING LIQUID

A method of filtrating liquid, the method comprising conducting a liquid through a filtering element, through an outlet line downstream of the filtering element and to a collection volume downstream of the outlet line; controlling a differential pressure of the liquid over the filtering element; and controlling a passing time of a filter flow of the liquid through the filtering element in conjunction with the differential pressure; wherein the control of the differential pressure and the passing time comprises controlling a collection volume liquid flow of the liquid out from the collection volume; and controlling a gas flow out from the collection volume. A filtration apparatus for filtrating liquid is also provided.