| Project/Area Number |
08650900
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
化学工学一般
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| Research Institution | KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY |
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Principal Investigator |
SAITO Riichiro KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CIVIL ENGINEERING,PROFESSOR, 土木工学科, 教授 (00037821)
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| Co-Investigator(Kenkyū-buntansha) |
MIHARA Megumi KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CHEMISTRY,RESEARCH ASSIST, 一般科目, 助手 (40190722)
OKABAYASHI Takumi KAGOSHIMA NATIONAL COLLEGE OF TECHNOLOGY,DEPARTMENT OF CIVIL ENGINEERING,ASSOCIA, 土木工学科, 助教授 (40044630)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1997: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Shirasu / Volcanic ash / Mt.Sakurajima volcano / Rain water / Domestic sewage except night soil / Filtration / Adsorption / Purification |
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| Research Abstract |
1. Rain water and domestic sewage except night soil were gathered in some cities. The characteristics were examined by measuring the concentration of cations and anions and pH.The pH in the rain water showed becoming low by ash issuing from Sakurajima volcano. The sewages of bath and cleaning showed basicity. The concentration of both cations and anions in the rain water were low. The concentration of Na^+ amd Ca^<2+> in the sewages of bath and that of Na^+ in the sewages of cleaning were high respectively. The sewages of bath and cleaning contain Cl^-, NO_3^- and SO_4^<2-> abundantly. The total of NO_3^- and NO_2^- exceeded water quality criteria value of tap water. The consequence is thought about with influence of pollutes, soap and wash.
2. The adsorbent was prepared by using volcanic ejecta (Shirasu). The adsorption characteristics about cations, anions and suspended solid (SS) were examined for the rain water and domestic sewage except night soil. Na^+, Mg^<2+>, Ca^<2+>, Cl^-, NO_3^- and SO_4^<2-> decresed approximately 30-40% for the sewages of bath and cleaning. It is expected that purification capacity can be raised in operation of filtration carrying out improvement.
3. The adsorbent was prepared by using volcanic ejecta (Shirasu and volcanic ash). The adsorption characteristics about organic matter (TOC) were examined for the domestic sewage except night soil (the sewages of kitchen and cleaning). The rate of removal by Shirasu was greater than that by volcanic ash for both sewages. The rate of removal of the sewages of kitchen was greater than that of the sewages of cleaning for both adsorbents (Shirasu and volcanic ash). It is expected that an increase in purification rate is possible in amelioration of the operating condition.
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