| 摘要 |
PROBLEM TO BE SOLVED: To flocculate a fine substance in water without adding a flocculant. SOLUTION: Columnar magnetic elements 3 are arranged in the cylindrical member 1 provided on the way of piping permitting water containing a fine substance to flow and water is allowed to flow through the annular passages 4 formed between the magnetic elements 3 and the inner wall surface 1a of the cylindrical member 1. |
