2005 Fiscal Year Final Research Report Summary
Development of bioremediation and biorefinery process for rare metal using metal-oxoanion reducing and accumulating bacteria
| Project/Area Number |
15310056
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Osaka University |
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Principal Investigator |
IKE Michihiko Osaka University, Gradate School of Engineering, Professor, 大学院・工学研究科, 教授 (40222856)
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| Co-Investigator(Kenkyū-buntansha) |
YAMASHITA Mitsuo Osaka University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (40220347)
SEI Kazunari Osaka University, Graduate School of Engineering, Assistant Professor, 大学院・工学研究科, 助手 (80324177)
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| Project Period (FY) |
2003 – 2005
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| Keywords | rare metal / wastewater treatment / soil purification / selenium / arsenicum / dissimilatory reduction / Bacillus sp.SF-1 |
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| Research Abstract |
For the prevention of environmental pollution by and exhaustion of rare metals which are increasingly consumed in high-tech industries, novel rare metal reducing and accumulating bacteria were screened and applied to rare metal removal/recovery processes.
In the first year, selenate containing wastewater treatment reactor was developed utilizing Bacillus sp.SF-1 which can reduce selenate to elemental selenium via selenate. Model wastewater containing 1-2 mM selenate could be treated with less than 1 day of the hydraulic retention time, and elemental selenium was completely removed and recovered when combining with simple coagulation sedimentation or ultrafiltration.
In the second year, arsenate reduction ability of Bacillus sp.SF-1 was characterized in detail and the feasibility of the bioremediation process for arsenate contaminated soil utilizing Bacillus sp.SF-1 was evaluated. Bacillus sp.SF-1 could utilize various carbon sources and did not require stringent anaerobic condition for s
… More
elenate reduction. These characteristics were remarkable benefit for the actual bioremediation process. In addition, Bacillus sp.SF-1 could reduce arsenate even selenate and/or nitrate were coexisting. Thus, it was implied that Bacillus sp.SF-1 has separate reductases which are individually induced by arsenate, selenate and nitrate.
In the final year, lab-scale slurry phase batch reactor experiment was performed. It was confirmed that both high-inoculum concentration of Bacillus sp.SF-1 and agitation were not needed. Therefore, continuous soil packed column reactor, which allows low cost treatment, was investigated to treat model arsenate contaminated soil. This reactor could purify the model arsenate contaminated soil (300 mg-As/kg-soil) to below a soil content standard of arsenate (150 mg-As/kg-soil) with hydraulic retention time of inoculum culture fluid at 1 day when combined with washing by phosphate buffer.
These results indicate the feasibility of the development of arsenate removal/recovery process utilizing metal-oxoanion reducing/accumulating bacteria. Less
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[Journal Article] Reduction kinetics of As(V) to As(III) by a dissimilatory arsenate-reducing bacterium, Bacillus sp.SF-1.2006
Author(s)
Soda, O.S., Yamamura, S., Zhou, H., Ike, M., Fujita,M.
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Journal Title
Biotechnology and Bioengineering Vol.93(No.4)
Pages: 812-815
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Reduction of As(V) to As(III) by a dissimilatory arsenate-reducing bacterium, Bacillus sp.SF-1.2006
Author(s)
Soda, O.S., Yamamura, S., Zhou, H., Ike, M., Fujita, M.
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Journal Title
Biotechnology and Bioengineering 93-4
Pages: 812-815
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Characterizing kinetics of transport and transformation of selenium in water-sediment microcosm free from selenium contamination using a simple mathematical model.2005
Author(s)
Fujita, M., Ike, M., Hashimoto, R., Nakagawa, T., Yamaguchi, K., Soda,O.S.
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Journal Title
Chemosphere Vol.58(No.6)
Pages: 705-714
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Characterizing kinetics of transport and transformation of selenium in water-sediment microcosm free from selenium contamination using a simple mathematical model.2005
Author(s)
Fujita, M., Ike, M., Hashimoto, R., Nakagawa, T., Yamaguchi, K., Soda, O.S.
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Journal Title
Chemosphere 58-6
Pages: 705-714
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Characterization of arsenate-, selenate- and nitrate-reducing activities in Bacillus sp.SF-12004
Author(s)
Yamamura, S., Terashi, S., Ike, M., Yamashita, M., Fujita,M.
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Journal Title
Japanese Journal of Water Treatment Biology Vol.40(No.4)
Pages: 161-168
Description
「研究成果報告書概要(和文)」より
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[Journal Article] Characterization of arsenate-, selenate- and nitrate-reducing activities in Bacillus sp.SF-1.2004
Author(s)
Yamamura, S., Terashi, S., Ike, M., Yamashita, M., Fujita, M.
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Journal Title
Japanese Journal of Water Treatment Biology 40-4
Pages: 161-168
Description
「研究成果報告書概要(欧文)」より
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