Department of Public Health, Kitasato University, School of Allied Health Sciences.
Emeritus Professor, Miyagi University.
Biocontrol Sci. 2022;27(4):193-200. doi: 10.4265/bio.27.193.
Electrolyzed water is a novel disinfectant that is widely used in the food industry. We conducted an experimental model-based study to determine the effectiveness of neutral electrolyzed water (NEW) for the daily nozzle cleaning of artificially contaminated tankless and tank-type bidet toilet seats. The toilet seats were designed to automatically self-clean the spray nozzles using tap water or NEW after each use or at specified intervals. The numbers of Pseudomonas aeruginosa and Escherichia coli microorganisms in the spray water were measured twice or thrice per week. A Kruskal-Wallis test was used to compare the bacterial count in the spray water of various cleaning (NEW) and control (tap water) conditions. The number of bacteria was significantly lower in NEW conditions with and without periodic nozzle cleaning functions than in tap water conditions for both tank-type and tankless bidet toilet seats. Microorganisms were detected only on the surface area around the opening for ejecting spray water and not in the internal piping at the spray nozzle tip. These findings demonstrate that NEW has superior decontamination efficacy over tap water when used as a cleaning agent for the spray nozzles of warm-water bidet toilet seats.
电解水是一种新型消毒剂，广泛应用于食品工业。我们进行了一项基于实验模型的研究，以确定中性电解水（NEW）在日常喷嘴清洗人工污染的无水箱和水箱式智能马桶座圈中的有效性。马桶座圈设计为在每次使用后或在规定的间隔时间内使用自来水或 NEW 自动自我清洁喷雾喷嘴。每周两次或三次测量喷雾水中绿脓假单胞菌和大肠杆菌微生物的数量。使用 Kruskal-Wallis 检验比较各种清洁（NEW）和对照（自来水）条件下喷雾水中的细菌计数。无论是带有还是不带有定期喷嘴清洁功能的 NEW 条件下，细菌数量都明显低于水箱式和无水箱智能马桶座圈的自来水条件。微生物仅在喷射水的出口周围的表面积上检测到，而不在喷雾喷嘴尖端的内部管道中检测到。这些发现表明，NEW 作为温水智能马桶座圈喷雾喷嘴的清洁剂，其去污效果优于自来水。
