Population normalization with ammonium in wastewater-based epidemiology: application to illicit drug monitoring
Fluctuations in ammonium (NH4+), measured as NH4-N loads using an ion-selective
electrode installed at the inlet of a sewage treatment plant, showed a distinctive pattern
which was associated to weekly (ie, commuters) and seasonal (ie, holidays) fluctuations of
the population. Moreover, population size estimates based on NH4-N loads were lower
compared to census data. Diurnal profiles of benzoylecgonine (BE) and 11-nor-9-carboxy-
Δ9-tetrahydrocannabinol (THC–COOH) were shown to be strongly correlated to NH4–N …
electrode installed at the inlet of a sewage treatment plant, showed a distinctive pattern
which was associated to weekly (ie, commuters) and seasonal (ie, holidays) fluctuations of
the population. Moreover, population size estimates based on NH4-N loads were lower
compared to census data. Diurnal profiles of benzoylecgonine (BE) and 11-nor-9-carboxy-
Δ9-tetrahydrocannabinol (THC–COOH) were shown to be strongly correlated to NH4–N …
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