Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.
Organo Food Tech Corporation, Saitama, Japan.
PLoS One. 2021 Jul 2;16(7):e0253595. doi: 10.1371/journal.pone.0253595. eCollection 2021.
Slightly acidic electrolyzed water (SAEW) was developed by Japanese companies over 20 years ago. SAEW has the advantage of potent sterilizing action while being relatively safe. This study evaluated the potential application of SAEW in spatial disinfection. Prior to experiments involving spatial spraying, the ability of SAEW to remove seven type of microorganisms that cause food poisoning was studied in vitro. Results indicated that free chlorine in SAEW, even at a low concentration (30 mg/L), was able to remove Cladosporium cladosporioides, a typical airborne fungus that degrades food, and spores such as Bacillus subtilis, a hardy bacterium. In an experiment involving spatial spraying, 3.43 log10 CFU/100 L of Staphylococcus epidermidis was sprayed in a room-sized space; the same space was then sprayed with SAEW. The number of settling microbes was measured and the sterilizing ability of SAEW was assessed. Results indicated that the concentration of S. epidermidis in the space was completely removed after 20 minutes of SAEW spraying. The above findings indicate that SAEW may be used to remove airborne microorganisms via spatial spraying.
微酸性电解水（SAEW）是 20 多年前由日本公司开发的。SAEW 具有强大的杀菌作用，同时相对安全。本研究评估了 SAEW 在空间消毒中的潜在应用。在进行空间喷雾实验之前，体外研究了 SAEW 去除七种引起食物中毒的微生物的能力。结果表明，SAEW 中的游离氯，即使浓度较低（30mg/L），也能去除典型的空气中真菌——破坏食物的枝孢霉，以及枯草芽孢杆菌等耐受力强的细菌孢子。在一项空间喷雾实验中，在一个房间大小的空间中喷洒了 3.43log10CFU/100L 的表皮葡萄球菌；然后用 SAEW 对同一空间进行喷雾。测量沉降微生物的数量并评估 SAEW 的杀菌能力。结果表明，SAEW 喷雾 20 分钟后，空间中表皮葡萄球菌的浓度完全被去除。上述结果表明，SAEW 可通过空间喷雾去除空气中的微生物。
