Gitter Anna, Mena Kristina D, Lisle John T
Department of Epidemiology, Human Genetics and Environmental Sciences, University of Texas Health Science Center-Houston School of Public Health, Houston, TX 77030, USA.
U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL 33701, USA.
Int J Environ Res Public Health. 2023 Sep 26;20(19):6833. doi: 10.3390/ijerph20196833.
Aquifer storage and recovery (ASR) can augment water supplies and hydrologic flows under varying climatic conditions. However, imposing drinking water regulations on ASR practices, including pre-treatment before injection into the aquifer, remains arguable. Microbial inactivation data-, , poliovirus type 1 and -were used in a human health risk assessment to identify how the storage time of recharged water in the Floridan Aquifer enhances pathogen inactivation, thereby mitigating the human health risks associated with ingestion. We used a quantitative microbial risk assessment to evaluate the risks for a gastrointestinal infection (GI) and the associated disability-adjusted life years (DALYs) per person per year. The risk of developing a GI infection for drinking water no longer exceeded the suggested annual risk threshold (1 × 10) by days 31, 1, 52 and 80 for each pathogen, respectively. DALYs per person per year no longer exceeded the World Health Organization threshold (1 × 10) by days 27, <1, 43 and 72. In summary, storage time in the aquifer yields a significant reduction in health risk. The findings emphasize that considering microbial inactivation, caused by storage time and geochemical conditions within ASR storage zones, is critical for recharge water treatment processes.
含水层储能与回灌（ASR）能够在不同气候条件下增加供水和水文流量。然而，对ASR实践施加饮用水法规，包括在注入含水层之前进行预处理，仍存在争议。在一项人类健康风险评估中，使用了微生物灭活数据、脊髓灰质炎病毒1型等，以确定补给的水在佛罗里达含水层中的储存时间如何增强病原体的灭活，从而降低与摄入相关的人类健康风险。我们使用定量微生物风险评估来评估胃肠道感染（GI）的风险以及每人每年相关的伤残调整生命年（DALYs）。对于每种病原体，分别在第31天、1天、52天和80天时，饮用再生水引发胃肠道感染的风险不再超过建议的年度风险阈值（1×10）。每人每年的伤残调整生命年分别在第27天、<1天、43天和72天时不再超过世界卫生组织的阈值（1×10）。总之，含水层中的储存时间可显著降低健康风险。研究结果强调，考虑由ASR储存区内的储存时间和地球化学条件导致的微生物灭活，对于回灌水的处理过程至关重要。
