| Project/Area Number |
06558086
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
環境保全
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
KURIHARA Norio Kyoto University, Radioisotope Research Center, Professor, 放射性同位元素総合センター, 教授 (00026428)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Kazumitu Shinsei Kako Co., Research Leader, 環境技術部, 主任研究員
AOKI Tohru Kyoto University, Radioisotope Research Center, Instructor, 放射性同位元素総合センター, 助手 (70027051)
SAITO Kazumi Kyoto University, Radioisotope Research Center, Associate Professor, 放射性同位元素総合センター, 助教授 (40027602)
KURAHASHI Kazuyoshi Kyoto University, Radioisotope Research Center, Associate Professor, 放射性同位元素総合センター, 助教授 (10025653)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥10,100,000 (Direct Cost: ¥10,100,000)
Fiscal Year 1995: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1994: ¥7,000,000 (Direct Cost: ¥7,000,000)
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| Keywords | Animal wastes containing radioisotopes / Dry-distilllation of solid wastes / Volume reduction by dry-distilllation / Weight reduction by dry-distilllation / Isotope distribution after the dry-distilllation / Recovery ratio of isotopes / Temperature control during dry-distilllation / Development of dry-distilllation apparatus for solid wastes |
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| Research Abstract |
(1) The original structure of the dry-distilllation apparatus was modified in order to keep the inner temperature homogeneous, to effectively cool the exhaust-gas, and to wash the inside-wall with an appropriate solvent.
By using this modified version of the apparatus, following results were obtained.
(2) Dry-distilllation of animal wastes containing ^3H,^<14>C,^<32>P,^<35>S,^<45>Ca, ^<51>Cr and ^<125>I produced a highly condensed residues that were stable during a long period of storage time.
(3) Recovery of the isotopes after the dry-distilllation was almost quantitative in every case.
(4) Dry-distilllation of non-animal solid wastes such as paper wastes and plastic wastes was also successful to substantially reduce the waste volume.
(5) In the process of dry-distilllation of solid wastes including papers and plastics, most radioisotopes tested could be recovered quantitatively. However, ^<35>S-labeled compounds were trapped inside of the pipe in the apparatus, and require further improvements of the process to completely recover them.
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