在现场卫生系统中减少病原体的系统审查和元分析
Isaac G Musaazi1, Shane McLoughlin2, Heather M Murphy2
1Department of Civil, Construction, and Environmental Engineering, San Diego State University, San Diego, CA 92182, United States.
安全的便污泥管理是减少全球疾病的关键. 这项研究发现,较高的温度,pH值和诸如石灰和尿素之类的添加剂显著改善了现场所的病原体减少.
科学领域:
- 环境科学 环境科学
- 公共卫生 公共卫生
- 微生物学 微生物学
背景情况:
- 现场卫生系统为全球34亿人提供服务.
- 关于影响便污泥中病原体生存的因素的知识有限.
- 对便污泥的安全管理对于减少传染病负担至关重要.
研究的目的:
- 系统地审查和分析便污泥中的病原体减少率.
- 研究设计,操作和环境因素对病原体生存的影响.
- 描述pH值,温度和添加剂在病原体灭活中的作用.
主要方法:
- 系统的文献综述和元分析.
- 从26篇文章 (243个实验) 中提取了1382个数据点.
- 分析了细菌,病毒,原生动物和虫的衰变速率和T99值.
主要成果:
- 平均T99值:细菌 (4.8天),病毒 (29天),原生动物 (>341天),虫蛋 (429天).
- 较高的pH值,温度和石灰的应用增加了病原体的减少.
- 石灰与尿素增强了阿斯卡里斯蛋的失活,比单独的石灰更多.
结论:
- 六个月的便污泥储存可以控制细菌和病毒的危害.
- 长时间的储存或性处理用尿素是需要的原生动物和虫.
- 需要对添加剂进行进一步的实地研究,并对原生动物病原体进行更多研究.
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