Hitachi, Ltd.

Hiroaki Okajima

Norihide Saho

Minoru Morita

Hisashi Isogami

Koichi Tsuzuki

A magnetic separation apparatus which coagulates substances to be removed in liquid by adding magnetic substances and a flocculent to liquid to be treated and adsorbs and captures the thus obtained magnetic aggregates by utilizing magnetic field of magnetic substances which move relative to the liquid to be treated, and other magnetic separation apparatus comprising a magnetic filter which contains charging magnetic metallic elements placed in a magnetic field and which magnetically adsorbs and captures the magnetic aggregates, are appropriately combined to remove the magnetic aggregates from the liquid to be treated with good efficiency. Substances to be removed in liquid can be removed with further good efficiency by employing a method of separating the magnetic aggregates separated by the magnetic filter from liquid with a centrifugal separator.

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Kamagaya, Japan

Hiroaki Okajima