School of Public Health, University of São Paulo, Av. Dr Arnaldo 715, 1°andar, 01246-904 São Paulo, Brazil; NARA - Center for Research in Environmental Risk Assessment, Av. Dr Arnaldo 715, 1°andar, 01246-904 São Paulo, Brazil.
School of Public Health, University of São Paulo, Av. Dr Arnaldo 715, 1°andar, 01246-904 São Paulo, Brazil; NARA - Center for Research in Environmental Risk Assessment, Av. Dr Arnaldo 715, 1°andar, 01246-904 São Paulo, Brazil.
Environ Pollut. 2020 Feb;257:113545. doi: 10.1016/j.envpol.2019.113545. Epub 2019 Nov 2.
This study aimed to quantify Giardia and Cryptosporidium in disinfected water reuse samples from two Wastewater Treatment Plants (A and B), which were quantified by USEPA 1693/2014 Method. Giardia was found in 35.8% of the total samples (<0.03 to 16 cysts/L) while Cryptosporidium in 30.2% (<0.03 to 25.8 oocysts/L). This study highlights the presence of both parasites in water for reuse despite treatment processes for their removal, which means there is a challenge to overcome. Their presence is preoccupant even though in low concentrations because the infectivity dose is low coupled with high prevalence in the global population. The practice of water recycling is valuable for sustainable water management and it is in line with Sustainable Developments Goals but should not threaten human health. Tackling this issue is more critical in developing countries because treatment processes are often more limited, the monitoring data from water reuse are not always available, the lack of regulation for water reuse quality and the lack of planning for its sustainable usage.
本研究旨在通过美国环保署 1693/2014 方法量化来自两个污水处理厂（A 和 B）的消毒水再利用样本中的贾第虫和隐孢子虫。在总样本中发现 35.8%的样本中存在贾第虫（<0.03 至 16 个囊胞/升），30.2%的样本中存在隐孢子虫（<0.03 至 25.8 个卵囊/升）。尽管有去除寄生虫的处理过程，但本研究强调了这两种寄生虫在再利用水中的存在，这意味着存在需要克服的挑战。尽管浓度较低，但它们的存在令人担忧，因为感染剂量低，加上全球人口中的高流行率。水再利用的实践对于可持续水资源管理是有价值的，并且符合可持续发展目标，但不应威胁人类健康。在发展中国家，解决这个问题更为关键，因为处理过程通常更为有限，水再利用的监测数据并不总是可用，水再利用质量的法规缺乏以及对其可持续利用的规划不足。
