四川省桶装饮用水回收桶中铜绿假单胞菌的污染状况调查

目的 研究桶装饮用水回收桶中铜绿假单胞菌的污染情况以及清洗消毒工序消除铜绿假单胞菌的有效性。方法 参考GB 8538-2016《食品安全国家标准 饮用天然矿泉水检验方法》中铜绿假单胞菌滤膜过滤法, 对大中小型(各2家)桶装饮用水生产企业的清洗消毒工序前后的回收桶进行检测, 并对检出的微生物进行鉴定。 结果 大中小型生产企业的回收桶清洗消毒前的铜绿假单胞菌的检出率依次为75%、80%、70% (平均75%), 清洗消毒后的检出率依次为0、20%、45% (平均22%), 同时检出其他假单胞菌及不动杆菌。结论 桶装饮用水回收桶中铜绿假单胞菌的污染普遍比较严重, 中小型企业的现有清洗消毒工序不足以清除铜绿假单胞菌。

Investigation on the contamination of Pseudomonas aeruginosa in recycling barrels of barreled drinking water in Sichuan province

Objective To investigate the Pseudomonas aeruginosa pollution in recycling barrels of barreled drinking water and evaluate the efficiency of its cleaning and disinfection process. Methods According to the Pseudomonas aeruginosa filtration membrane filtration method in GB 8538-2016 National Food Safety Standard-Drinking natural mineral water inspection method, the recycling barrels before and after the cleaning and disinfection process of large, medium and small (each two) sized drinking water production enterprises were tested, and the detected microorganisms were identified. Results The detection rate of Pseudomonas aeruginosa before cleaning and disinfection process in the recycling barrels of large, medium and small production enterprises was 75%, 80% and 70%, respectively (the average value was 75%). After cleaning and disinfection process, the detection rate was 0, 20%, 45% (the average value was 22%), meanwhile other Pseudomonas and Acinetobacter were detected. Conclusion It is a prevalent severe pollution of P. aeruginosa in recycling barrels for these small and medium enterprises, and the prevailing process of cleaning and disinfection is not effective enough to disinfect P. aeruginosa.