METHOD FOR THE PURIFICATION OF WATER BY MEANS OF MEMBRANE FILTRATION

摘要

The present invention relates to a method for the purification of water by means of membrane filtration, in which a suspension of particles of a filtration aid which forms a deposit layer on the membrane is added to the water, the membrane is periodically cleaned in order to at least partially remove the deposited layer of filtration aid with pollutants caught therein, in which the filtration aid is only added during a part of the period between the periods in which the membrane is cleaned and the filtration aid is added in a relatively high concentration. The method of the invention makes a stable process operation at high flux possible in the ultra filtration of highly polluted water.