Fig. 3: Decay of SARS-CoV-2 RNA in sewers.
From: Impact of sewer biofilms on fate of SARS-CoV-2 RNA and wastewater surveillance
a, Changes of SARS-CoV-2 RNA concentrations in samples collected from the Reactor, including wastewater mixture (Cww n = 11, independent samples; dark-blue filled circles), liquid (Cl n = 9, independent samples; light-blue unfilled circles), SS (Css n = 8, independent samples; grey filled triangles) and biofilm (Cbio n = 4, independent samples; orange unfilled triangles) phases. Data are presented as mean values with s.d. Transformation trends of Cww and Cl are fitted with first-order kinetics using equation (3). b, Changes of viral GC numbers in different sewer compartments of the Reactor, including wastewater mixture (Nww n = 11, independent samples; dark-blue filled circles), liquid (Nl n = 9, independent samples; light-blue unfilled circles), SS (Nss n = 8, independent samples; grey filled triangles), biofilm (Nbio n = 4, independent samples; orange unfilled triangles) phases and total GC number in the Reactor (Ntotal n = 4, independent samples; green unfilled diamonds). Data are presented as mean values with s.d. Transformation trends of Nww, Nl and Ntotal are fitted with first-order kinetics during the 24 h testing period using equation (4). Data are provided in source data.
