In contrast to pathogens, the effects of environmental microbes on the water quality in baths have not yet been examined in detail. We herein focused on a public bath in which groundwater was pumped up as bath water and disinfected by chlorination. Ammonia in groundwater is oxidized to nitrite, thereby reducing residual chlorine. A batch-culture test and bacterial community ana-lysis revealed that ammonia-oxidizing bacteria accumulated nitrite and had higher resistance to chlorination than nitrite-oxidizing bacteria. These results demonstrate that the difference in resistance to chlorination between ammonia-oxidizing and nitrite-oxidizing bacteria may lead to the accumulation of nitrite in baths using groundwater.

中文翻译：

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日本氯化公共浴池系统中使用的城市地下水中硝化细菌产生的亚硝酸盐。

与病原体不同，环境微生物对浴场水质的影响尚未得到详细研究。我们在这里重点介绍了一个公共浴室，其中抽取地下水作为沐浴水并通过氯化消毒。地下水中的氨被氧化成亚硝酸盐，从而减少余氯。分批培养试验和细菌群落分析表明，氨氧化细菌积累亚硝酸盐，比亚硝酸盐氧化细菌具有更高的氯化抵抗力。这些结果表明，氨氧化细菌和亚硝酸盐氧化细菌在耐氯化作用方面的差异可能导致使用地下水的浴池中亚硝酸盐的积累。