| Project/Area Number |
20404003
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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 | 海外学術 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Osaka Sangyo University |
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Principal Investigator |
SUGAHARA Masataka Osaka Sangyo University, 人間環境学部, 教授 (60026119)
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| Co-Investigator(Kenkyū-buntansha) |
OZAKI Hiroaki 大阪産業大学, 工学部, 教授 (40135520)
HAMASAKI Tatsuhide 大阪産業大学, 人間環境学部, 教授 (50340617)
FUJIKAWA Yoko 京都大学, 原子炉実験所, 教授 (90178145)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2010: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2008: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
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| Keywords | 砒素 / 鉄 / 鉄バクテリア / 水処理 / 地下水 / ベトナム / ネパール / 浄化実験 / 鉄バクテリア法 / マンガン / アンモニア / 除去 / ハノイ / アジア |
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| Research Abstract |
We have developed the biological filtration system for simultaneous removal of iron, As, manganese and ammonia from water after 7 years of pilot test in Japan. It can be used in drinking water treatment plant as well as in individual household. Recently, the technique was successfully applied to treat As containing well water in Hanoi, Vietnam. In average, the raw water at the Hanoi site contained 9.6±3.1 mg/L of Fe and 59±8 μg/L of As during the term of the experiment. Ca. 90% of the total arsenic was As(III). The average As removal in the operation from Nov. 4, 2009 to Sep 27, 2010 was 84±6%, during which the flow rate was changed from 100 m/day to 400 m/day. Raw water feeding was continuous for the first 5 months, and was changed to intermittent mode (operate for 1 hr and stop for 3 hrs) because of the reduced groundwater level. When the flow rate was increased to 600 m/day after Sep 27, 2011, the removal was decreased to 67% probably because the filter bead height was small (less than 1 m) compared to the pilot test conducted in Japan (1.5m bead height). The results of the pilot-test showed that the biological filtration technology could efficiently remove As in groundwater from Hanoi.
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