DEVELOPMENT OF TRITIUM GAS ELIMINATING SYSTEM BY IMMOBILIZED BACTERIA

1993 Fiscal Year Final Research Report Summary

• Project/Area Number: 04558027
• Research Category: Grant-in-Aid for Developmental Scientific Research (B)
• Allocation Type: Single-year Grants
• Research Field: Nuclear engineering
• Research Institution: IBARAKI UNIVERSITY
• Principal Investigator: ICHIMASA Michiko IBARAKI UNIVERSITY,FACULTY OF SCIENCE,PROFESSOR, 理学部, 教授 (60007557)
• Co-Investigator(Kenkyū-buntansha): NISHIKAWA Masafumi KYUSHU UNIVERSITY,FACULTY OF TECHNOLOGY,PROFESSOR, 工学部, 教授 (90026229) ; SUZUKI Eiji IBARAKI UNIVERSITY,FACULTY OF SCIENCE,RESEARCH ASSOCIATE, 理学部, 助手 (60211984)
• Project Period (FY): 1992 – 1993
• Keywords: Tritium / Tritium gas / Biological oxidation / Hydrogen-oxidizing bacteria / Immobilized bacteria

Research Abstract

In this study we investigated the possibility and development of elimination system of tritium gas by immobilized tritium gas-oxidizing bacteria as a catalyst. Among various hydrogen (tritium gas) -oxidizing bacterial strains tested, an actinomycetes with highest oxidation activity was chosen and culture conditions to make immobilized cells were examined. Tritium gas oxidizing activity in immobilized cells with fiberm was kept for a long time at low temparature and the oxidation activity of immobilized cells was recovered after washing and recultivation. Tritium gas elimination system consisted of a column packed with immobilized cells, -60ﾟC cold trap, molecular sieves and silica gel traps, and a tritium monitor.