The development of environmental rehabilitation techniques of lakes and rivers by purification system based on substances circulation
| Project/Area Number |
12794003
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| Research Category |
Grant-in-Aid for University and Society Collaboration
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| Allocation Type | Single-year Grants |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | Akita Prefectural University (2001-2002)
The University of Tokyo (2000) |
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Principal Investigator |
MATSUMOTO Satoshi MATSUMOTO,Satoshi, 生物資源科学部, 教授 (20032295)
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| Co-Investigator(Kenkyū-buntansha) |
OHTSUKI Hitoshi (財)琵琶湖淀川水系保全機構事務局, 事務局長
ISHIKAWA Yuichi Akita Prefectural University, 助手 (60315603)
UEDA Tohru Akita Prefectural University, 助教授 (60243945)
SUZUKI Teruhiko 鉄建建設(株), エンジニアリング部, 技術課長
TAKAO Keiichi 東洋電化工業(株), 環境事業本部・本部長
大塚 重人 東京大学, 大学院・農学生命科学研究科, 助手 (10313074)
西山 雅也 東京大学, 大学院・農学生命科学研究科, 助教授 (50263801)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 2002: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥6,500,000 (Direct Cost: ¥6,500,000)
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| Keywords | eutrophication / water pollution / filtration material for nitrogen elimination / filtration material for phosphorus elimination / microhabitats / treatment for a large amount of foul water / ceramic filtration materials / charcoal granular / リン除去濾剤 / 凝集沈殿剤 / プレス脱水 / 湖沼底質土の回収 / 水質浄化装置 / 浄化資材 / 底質凝集剤 / 富栄養塩除去 / アルミニウム / COD / ポリ塩化アルミニウム |
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| Research Abstract |
In the former of the study period using the purification water equipment by the natural circulation system which is composed by only natural materials, the development of high performance filtration material was tried to attain the discharge concentration of less than 0.5mg/l for nitrogen and less than 0.01mg/l for phosphorus. For the nitrogen, the ceramic filtration material obtained by heat-treated mixtures of charcoal granular and zeolite powder succeeded to reduce the nitrogen discharge concentration to less than 0.5mg/l in regular working time. However, for the phosphorus, the filtration materials mainly composed of calcium silicate could not attain the limitation. On the other hand, at the pond where is suffered from the heavy pollution with foul water it was cleared that the pollution originates from the nutrients decomposed gradually from a large quantity of the mud sediments (sludge). For the effective collection of the pond sludge, calcium silicate materials was newly developed as a cohesive and safety ones instead of usual poly aluminum chloride (PAC), and we demonstrated that this method is effective for the collection of pond sludge as a dehydrated cake. In the later of the study period, studies were conducted to heavily polluted rivers at urban area. In these studies, a filtration material was developed to eliminate only BOD and SS in the short time treatment for a large amount of foul water. As results, we succeeded to produce a ceramic small ball having charcoal granular treated with chitosan built-in and demonstrated that this ceramic material coated with clay can display in short time and for a large amount of foul water the discharge water with very high transparency.
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Report
(4 results)
Research Products
(11 results)
