2005 Fiscal Year Final Research Report Summary
Development of novel on-site treatment system for medical solid wastes using supercritical water oxidation
Grant-in-Aid for Scientific Research (B)
|Allocation Type||Single-year Grants |
Environmental technology/Environmental materials
|Research Institution||The University of Tokyo |
OSHIMA Yoshito The University of Tokyo, Graduate School of Frontier Sciences, Professor -> 東京大学, 大学院・新領域創成科学研究科, 教授 (70213709)
YAMAMOTO Kazuo The University of Tokyo, Environmental Science Center, Professor, 環境安全研究センター, 教授 (60143393)
KARIMA Risuke The University of Tokyo, Environmental Science Center, Associate Professor, 環境安全研究センター, 助教授 (50281308)
SUZUKI Yosimitsu The University of Tokyo, Environmental Science Center, Associate Professor, 環境安全研究センター, 助教授 (40163026)
TSURU Satoko The University of Tokyo, Graduate School of Engineering, Associate Professor, 大学院・工学系研究科, 助教授 (80177328)
|Project Period (FY)
2004 – 2005
|Keywords||Medical Wastes / Supercritical Water Oxidation / Infectious Materials / Simultaneous Treatment / On-Site Treatment / Complete Destruction / Plastics / Risk Reduction|
The objective of this project was to obtain the fundamental engineering information on the on-site treatment of infectious medical wastes by supercritical water oxidation (SCWO). The outreaches of this project are summarized as follows.
1. For the degradation of polypropylene and disposable diapers, chosen as model medical supplies, the dependence of conversion on the reaction conditions (temperature, pressure, oxygen concentration) was experimentally investigated using a small batch reactor. As a result, it was demonstrated that these materials can be completely destructed Within 15 minutes of reaction time at 450℃ and 25 MPa.
2. The reaction progress of plastic degradation was directly observed by means of shadowgraph imaging.
3. It was experimentally confirmed that E.Coli DH5α,a model infectious substance, can be completely destroyed under supercritical water condition.
4. Supercritical water oxidation of methylamines was studied in order to obtain the basic kinetic information of nitrogenous organic compounds.
5. A semi-batch reactor system for the on-site treatment of infectious medical wastes was designed, taking the problems of corrosion and safety into consideration.
6. Interviews With several hospitals and medical institutions were carried out and the feasibility of this system was discussed.
Research Products (4 results)