| 摘要 |
PROBLEM TO BE SOLVED: To provide a filtration element excellent in pressure proof and durability at a low cost, a filtration element unit by using the same and a purification tank which can be operated stably. SOLUTION: A filtration element 1 is equipped with two plane boards 2 placed oppositely and frame materials 4, 5 and 6 which seal the rim of the hollow part formed between these two boards, a filtrate path passing into the hollow part is formed in at least a part of the frame materials, and at least one of the plane boards 2 is a sintered filter. Further, a filtration element unit uses this element and also a purification tank sets this element.
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