过氧乙酸气体餐具消毒柜消毒效果的观察

OBSERVATION ON DISINFECTION EFFICACY OF PERACETIC ACID GAS TABLEWARE DISINFECTOR

研制的过氧乙酸气体餐具消毒柜对大肠杆菌和白色葡萄球菌，使用１ｇ／ｍ３过氧乙酸；对枯草杆菌黑色变种芽胞，使用２．５ｇ／ｍ３过氧乙酸，熏蒸６０分钟，杀灭率均达９９．９％以上。对现场的污染餐具，按１ｇ／ｍ３过氧乙酸，熏蒸６０分钟，合格率达８０％以上。

In order to provide a new method for disinfection of tableware,the peracetic acid gastableware disinfector was developed.The disinfector is made of wood,has two layers of doorsand is 1.0m3 in size. It is separated by a holed septum into upper and lower parts.Aperacetic acid evaporator is put in the lower part for evaporating peracetic acid by heating.30ml of peracetic acid is used and evaporated for 60 min each time. The stock solution ofperacetic acid used is 19% in concentration and is diluted to optimal concentration accordingto requirement during disinfection. It was indicated in laboratory experiment that 99.99 %～100.00 % of Escherichia coli and Staphylococcus aureus on cloth strip could be killed when peracetic acid 1 g / m3 with60一minute contact time was used.These results met the requirements of disinfection(killingrate > 99.9%).For Bacillus subtilis var.niger spore,the dose of peracetic acid should be in-creased to2.5 g/ m3 to attain the same efficacy. The on一the一spot observation in restaurants indicated that the eligible rate of disinfectedtableware was higher than 80% when peracetic acid 1 g / m3 with a 60-minute contact time was used.