A fate model of pathogenic viruses in a composting toilet based
on coliphage inactivation |
| |
Authors: | Shinobu Kazam Narue Tameike Naoko Nakagawa and Masahiro Otaki |
| |
Institution: | 1. Department of Human Environmental Science, Ochanomizu University, 2-1-1 Bunkyo-ku Otsuka Tokyo 112-8610, Japan.E-mail: g0870506@edu.cc.ocha.ac.jp 2. INAX Co. 1-23-6, Yoshino-cho Kita-ku Satiama 331-0811, Japan 3. Department of Civil and Environmental Engineering, Tokyo Metropolitan University, 1-1 Minamiosawa Hachioji City, Tokyo 192-0397, Japan |
| |
Abstract: | A composting toilet using sawdust as a matrix has the potential to trap pathogens that might occasionally be contained in human
feces. Therefore, care should be taken when handling the sawdust. It should also be noted that pathogenic viruses tend to have stronger
tolerance than pathogenic bacteria. The fates of several species of coliphages, T4, , Q and MS2, in sawdust were investigated as
a viral model. The fates of coliphages were significantly different among them, and they changed in response to temperature and the
water content of the sawdust. As the results, T4 coliphage had the strongest tolerance and Q had the weakest one in sawdust. It was
estimated the days required to decrease virus to a safe level based on a risk assessment. According to the rates of Q and T4, 15 days
and 167 days were required respectively for a safe level of infection risk based on actually operated composting toilet condition. Thus,
it was significantly different depending on the species and sawdust conditions. |
| |
Keywords: | composting toilet viral indicator coliphage risk assessment |
本文献已被 维普 万方数据 PubMed 等数据库收录! |
| 点击此处可从《环境科学学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《环境科学学报(英文版)》下载免费的PDF全文 |
|