a process has been found which increases the efficiency and effectiveness of the overall filtration system , by reducing the fouling of the microfiltration system , thereby increasing its permeability and reducing the frequency of cleanings necessary . according to one embodiment of the invention , cationic coagulant is used to treat water in the early stages of a water treatment system , and to coagulate and flocculate the contaminants , and thereby resulting in reduced fouling of the microfiltration system , resulting in increase flux , less deposit of colloidal and particulate solids and dissolved organics on the surface of the microfiltration membrane , thereby reducing the frequency and duration of the membrane cleaning and ultimate replacement