PRETREATING APPARATUS FOR SUPPLYING SEAWATER TO APPARATUS DESALTING OR CONCENTRATING SALT IN SEAWATER BY USING FILM

摘要

PROBLEM TO BE SOLVED: To provide a pretreating apparatus capable of reducing a water production cost containing a running cost without using chemicals.SOLUTION: The apparatus 10 for pretreating seawater fed to an apparatus 16 for removing or concentrating salt in seawater by membrane filtration is characterized by including a biofilm 17 comprising a particle filtering material and removing fine particles in seawater and also removing BOD components by passing seawater.