| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact laminated filter high in regeneration efficiency and easy to manufacture. SOLUTION: A large number of ring-shaped filter elements, each of which has a large number of through-holes 6 having a hole size large than the particle size of a suspended substance formed therein so as turned in the thickness direction thereof and has notches 5-1, 5-2 respectively formed to the inner and outer peripheral end parts thereof, are laminated and an inflow part of a liquid to be treated is provided on the side of one of an inner peripheral lamination surface and an outer peripheral lamination surface and an outflow part of the liquid to be treated is provided on the side of the other one of them and thin-walled parts gradually reduced in wall thickness toward the end edge direction of each filter element are provided to the inner and outer peripheral end parts of each filter element and the inflow and outflow parts are formed by the thin-walled parts and the notches 5-1, 5-2.
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