Development of novel on-site treatment system for medical solid wastes using supercritical water oxidation

本项目的目的是获得超临界水氧化(SCWO)现场处理感染性医疗废物的基本工程信息。本项目的外展工作总结如下：1.以聚丙烯和一次性尿布为模型医用材料，在小型间歇反应器中考察了反应条件(温度、压力、氧气浓度)对转化率的影响。结果表明，在450℃和25 Mpa的反应时间内，这些材料可以在15分钟内完全摧毁。用阴影成像法直观地观察了塑料降解的反应过程。实验证实，在超临界水条件下，模型感染性物质E.Coli DH5α可以完全被破坏。为了获得含氮有机化合物的基本动力学信息，对甲胺的超临界水氧化进行了研究。考虑到腐蚀和安全问题，设计了半间歇式反应器系统，用于现场处理感染性医疗废物。对几家医院和医疗机构进行了访谈，并讨论了该系统的可行性。

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.