FILTRATION APPARATUS AND FILTRATION METHOD

摘要

An object is to provide a filtration apparatus which has a simplified pipe arrangement mechanism and has excellent uniform cleanability of a filter layer unit by backwashing. Provided is a filtration apparatus including: a filter layer unit that filters raw water,' a plurality of water collection pipes that collect permeate permeating through the filter layer unit! and a pressure conduit that pressure-feeds water into the plurality of water collection pipes, the filter layer unit being backwashed by water transferred into the water collection pipes from the pressure conduit, wherein a communicating section for communication between the respective water collection pipes is provided so as to transfer water, which has been transferred into the water collection pipes from the pressure conduit, between the respective water collection pipes by a difference in pressure applied to the respective water collection pipes.