A newly isolated Bacillus subtilis HHT-1 has the ability to oxidize manganese ions. We attempted to immobilize the cells on the microfiltration membrane and remove manganese ions from the raw water as manganese oxides. After subculturing, the broth was filtered with NTF-5200 (pore size 0.2 μm), Nitto, Japan. The filter was set in Nitto Membrane Master RUM-2, Nitto, Japan and used as the bioreactor. Manganese sulfate was dissolved in distilled water to become 1 mg/l or 0.2 mg/l of the final manganese ion concentration, and used as the raw water. The volume of the bioreactor was 10 ml. The flow rate, pressure, retention time of the bioreactor, and circulation frequency were, 0.08 l/min, 0.4 kgf/cm2, 7.5 sec, and 0.04 time/min, respectively. Removal rate of manganese ions rose with increasing cell mass immobilized. The bioreactor was active even at low concentration of initial manganese (0.2 mg/l) and 0.04 mg/l or less of manganese ion concentration in the treated water was obtained.
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Research Article|
March 01 2001
Application of a membrane bioreactor immobilized with Bacillus subtilis HHT-1 for removing manganese ions in water
K. Takamizawa;
1Department of Bioprocessing, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
E-mail: [email protected]
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Y.C. Chang;
Y.C. Chang
1Department of Bioprocessing, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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J. Hattori;
J. Hattori
1Department of Bioprocessing, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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M. Kani;
M. Kani
1Department of Bioprocessing, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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K. Mori;
K. Mori
1Department of Bioprocessing, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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M. Hatsu
M. Hatsu
1Department of Bioprocessing, Faculty of Agriculture, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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Water Supply (2001) 1 (2): 183–189.
Citation
K. Takamizawa, Y.C. Chang, J. Hattori, M. Kani, K. Mori, M. Hatsu; Application of a membrane bioreactor immobilized with Bacillus subtilis HHT-1 for removing manganese ions in water. Water Supply 1 March 2001; 1 (2): 183–189. doi: https://doi.org/10.2166/ws.2001.0036
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