厨余垃圾分类设备表面细菌和致病菌检测及杀菌效果研究

Study on Detection and Germicidal Effect of Bacteria and Pathogenic Bacteria on the Surface of Kitchen Waste Sorting Equipments

对厨余垃圾分类设备表面细菌、致病菌随气温变化规律及杀菌效果进行研究,用平板计数法和筛选平板分别对设备表面喷洒杀菌剂前后的菌落总数、致病菌和杀菌效果进行6个月的取样检测。结果表明:厨余垃圾分类设备表面菌落总数、致病菌种类和检出率主要受温度影响,温度最高的9月和最低的11月,厨余垃圾分类设备表面平均菌落总数分别是2.4×10^(6)、3.6×10^(4)cfu/cm^(2);5种厨余垃圾分类设备表面检测到4种常见的致病菌,其中金黄色葡萄球菌和致泻大肠埃希氏菌的平均检出率较高,分别是60%和37%;厨余垃圾分类设备表面喷洒杀菌剂后,作用10 min可达到99.77%的杀菌效果。

The variation rule of bacteria and pathogenic bacteria on the surface of kitchen waste sorting equipments with temperature and the bactericidal effect were studied.The total number of bacterial colonies,pathogenic bacteria and bactericidal effect on the surface of equipment before and after spraying fungicide were sampled by plate counting method and pathogenic bacteria screening tablet respectively for six months.The results showed that the total number of bacteria colonies and pathogenic microorganism species on the surface of kitchen waste sorting equipments were highly correlated with outside temperature.In September with the highest temperature and November with the lowest temperature,the total number of bacteria colonies on the surface of the kitchen waste sorting equipments were 2.4×10^(6) and 3.6×10^(4)cfu/cm^(2) respectively.Four different pathogens were detected on the surface of five different kinds of kitchen waste sorting equipments,and the total detection rates of Staphylococcus aureus and diarrheagenic Escherichia coli were 60% and 37%,respectively.After spraying fungicide on the surface of kitchen waste sorting equipments,the bactericidal effect of 99.77% could be reached after ten minutes.