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Separation of Algae with Magnetic Iron(III) Oxide Particles Using Superconducting High Gradient Magnetic Field

Shin-ichi TAKEDA^*, Toshiyuki FURUYOSHI, Isao TARI, Atsushi NAKAHIRA^†, Yoshiharu KAKEHI^††, Tadaoki KUSAKA^††, Soichi OGAWA^††, Jyunji KATAYAMA^†††, Yoichi INNO^†††, Shigehiro NISHIJIMA^††††, Koso FUJINO^{†††††}, Kazuya OHMATSU^{†††††}

Faculty of Engineering, Okayama University; 3-1-1 Tsushima-Naka, Okayama-shi 700-8530 Japan

^† Faculty of Engineering, Kyoto Institute of Technology; Matsugasaki, Sakyo-ku, Kyoto-shi 606-8585 Japan

^†† Technology Research Institute of Osaka Prefecture; 2-7-1 Ayumino, Izumi-shi 594-1157 Japan

^††† Osaka Agricultural and Forestry Research Center; 442 Shakudo, Habikino-shi 583-0862 Japan

^†††† ISIR Osaka University; 8-1 Mihogaoka, Ibaraki-shi 567-0047 Japan

^{†††††} Sumitomo Electric Industries, Ltd; 1-1-3 Shimaya, Konohana-ku, Osaka-shi 554-0024 Japan

Algae in water was separated by using superconducting high gradient magnet after magnetization of algae by means of attaching the colloidal particles of hydrous iron(III) oxide. It is found that the percentage of recovery of algae depends on the added amount of oxide particles. The percentage of recovery was also found to reach almost 100% when the very small amount of particles was added to the algae suspensionDThese results demonstrate the feasibility of the magnetic separation of algae with no addition of polymer surfactant.

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