METHOD AND APPARATUS FOR FILTERING AND SEPARATING SEWAGE

摘要

PROBLEM TO BE SOLVED: To provide a method and apparatus for filtering and separating sewage, capable of forming an always uniform dynamic filter layer on the surface of a filter without generating the excessive accumulation of sludge accompanied by the elapse of a treatment time and being affected by fluctuations in the flow of sludge in an aeration tank. SOLUTION: In the method and apparatus for filtering and separating sewage, one or a plurality of cylindrical filters each having a water permeable filter sheet bonded to the surface thereof are immersed and arranged in a treatment tank in which sewage flows and treated water is obtained from an intake pipe provided to the axial center part of each cylindrical filter by head pressure difference while each cylindrical filter is rotated around its axial center. It is preferable to be capable of adjusting the rotational speed and rotary direction of the cylindrical filter in the treatment tank.