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Water Supply Vol 1 No 5-6 pp 169–175 © IWA Publishing 2001
Advanced water treatment system using ozone and ozone resistant microfiltration module
M. Hashino*, Y. Mori**, Y. Fujii***, K. Nakatani****, H. Hori*****, K. Takahashi******, N. Motoyama*******, K. Mizuno******** and T. Minegishi*********
*Industrial Membranes Development Department, Asahi Chemical Industries Co. Ltd., 2-1, Samejima, Fuji, Shizuoka, 416-8501 Japan. E-mail: hashino.mc@om.asahi-kasei.co.jp
**Industrial Membranes Development Department, Asahi Chemical Industries Co. Ltd., 2-1, Samejima, Fuji, Shizuoka, 416-8501 Japan.
***Industrial Membranes Development Department, Asahi Chemical Industries Co. Ltd., 2-1, Samejima, Fuji, Shizuoka, 416-8501 Japan.
****Isomura Hosui Kiko Co. Ltd., 1-1-3, Toranomon, Minato-ku, Tokyo
*****Isomura Hosui Kiko Co. Ltd., 1-1-3, Toranomon, Minato-ku, Tokyo
******Fuji Electric Co. Ltd., 1 Fuji-machi, Hino-city, Tokyo
*******Fuji Electric Co. Ltd., 1 Fuji-machi, Hino-city, Tokyo
********NKK, 1-1 Minami-Watarida-cho, Kawasaki-ku, Kawasaki-city, Kanagawa
*********NKK, 1-1 Minami-Watarida-cho, Kawasaki-ku, Kawasaki-city, Kanagawa
ABSTRACT
In order to achieve an efficient and economical advanced drinking water system, the relationship between operating conditions, membrane filtration flux and water qualities was examined by using a pilot plant consisting of ozonation facility, ozone resistant microfiltration (MF) module and granular activated carbon (GAC) tower. It was found that keeping residual ozone of more than 0.3 mg/L on the membrane surface is necessary in order to obtain a high membrane filtration flux. Withy ozone dosage of 3 mg/L by ejector and filtration by dead-end mode, this new system provided a high membrane filtration flux of more than 5 m3/m2/day. Quality of the produced water from the GAC tower was meeting the drinking water standard.
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