医疗废弃物电子束辐照灭菌处理效果

Sterilization of medical waste by electron beam

利用电子束对医疗废弃物进行不同剂量的辐照处理,并以短小芽孢杆菌和枯草芽孢杆菌作为微生物指示菌,通过微生物计数检验灭菌效果,分析吸收剂量和医疗废弃物材质对微生物灭活效果的影响。结果表明:吸收剂量与存活微生物菌对数值线性相关。短小芽孢杆菌和枯草芽孢杆菌的D_(10)值分别为2.45 kGy和1.22 kGy。吸收剂量为15 kGy时,医疗废弃物模拟物上的短小芽孢杆菌和枯草芽孢杆菌杀灭对数值达到6,满足现行医疗废弃物微波和化学消毒技术规范的处理要求。

To study the effectiveness of electron-beam sterilization of medical waste, medical wastes were irradiated with different doses of an electron beam, and Bacillus pumilus and Bacillus atrophaeus were used as microbial indicators. Microbial counting was used to analyze the effects of the absorbed dose and medical waste material on the inactivation of microorganisms. The results showed that the absorbed dose was linearly correlated with the logarithm of the total number of viable microbial colonies;the D_(10) values of Bacillus pumilus and Bacillus atrophaeus were 2.45 kGy and 1.22 kGy,respectively.When the absorbed dose was 15 kGy, the killing logarithm of Bacillus pumilus and Bacillus atrophaeus on the medical waste simulants reached 6, thereby meeting the current technical requirements for the microwave and chemical disinfection of medical waste.