Bacterial dynamics in drinking water distribution systems and flow cytometry monitoring scheme optimization
نویسندگان
چکیده
Water biostability is desired within drinking water distribution systems (DWDSs) to limit microbiologically-related operational, aesthetic and, eventually, health-related issues. However, variations in microbiological quality can take place both spatially along DWDS pipelines and temporally at single locations due biofilm detachment, seasonality other processes. In this study, long- short-term trends of bacterial concentration community structure were investigated a secondary branch an unchlorinated for several months using high-frequency flow cytometry (FCM) traditional laboratory monitoring campaigns. Long-term concentrations structures likely caused by changes the physical-chemical (i.e. pH conductivity). Short-term daily pattern, instead, resulted significant between different hours, detachment loose deposits resuspension related local flow. These patterns, however, showed broad did not persist during entire campaign presumably stochasticity instantaneous demand seasonal consumption. During periods without sensible long-term trends, sampling hours explain comparable or larger fraction diversity compared dates. The observed with FCM poorly detected analyses, as correlation two rather weak, highlighting limited information provided approaches. On hand, data correlated conductivity, underlining relation quality. Such results suggest that advanced control could minimize variations. Moreover, planning should into account time reduce noise fluctuations and/or assess overall Finally, costs are one barriers which prevent more widespread use FCM, scheme optimization strategy was developed. employs from initial period select maximize composition.
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ژورنال
عنوان ژورنال: Journal of Environmental Management
سال: 2021
ISSN: ['0301-4797', '1095-8630']
DOI: https://doi.org/10.1016/j.jenvman.2021.112151