Key result
Microfiltration removed pepper mild mottle virus by 0.0 to >0.9 log10, while slow sand filtration removed up to 2.8 log10, though its efficiency decreased to 0.0-1.0 log10 under cold water temperatures.
Why the study?
Evaluating enteric virus removal by full-scale drinking water treatment processes is important for assessing infection risk, but challenging due to low virus numbers and detection inhibitors.
Slow sand filtration effectively removes PMMoV from drinking water, but its efficiency is significantly reduced in cold water temperatures, whereas microfiltration has limited efficacy.
This is the authors' abstract. We don't add key points for this paper.
It is important to evaluate the removal of enteric viruses by drinking water treatment processes so that viral infection risk can be assessed and managed. However, evaluating the removal of enteric viruses by full-scale treatment processes can be challenging due to the low numbers of viruses and the presence of substances in the water samples that inhibit detection. In this study, we evaluated the removal of pepper mild mottle virus (PMMoV) by microfiltration (MF) and slow sand filtration (SSF) at two full-scale drinking water treatment plants in Japan, quantifying virus concentrations with real-time polymerase chain reaction (qPCR). The removal of PMMoV by MF ranged from 0.0 to >0.9 log10, although concentrations were below the detection limit for half of the treated water samples. SSF removed PMMoV by up to 2.8 log10; however, the removal efficiency decreased to 0.0–1.0 log10 under cold water temperatures. Process control showed that nucleic acid extraction and qPCR efficiency were inhibited in nearly 40% of water samples. Dilution, DAX-8, and ferrihydrite treatments for purification were effective in mitigating these inhibitory effects.
Answers are grounded in this paper and cite their sources.
Variable PMMoV removal by MF (0–>0.9 log) and temperature-sensitive SSF; leaves open its utility as enteric virus surrogate for full-scale risk assessment.
No takes yet. Share an insight, caveat, or question.
Cảnh et al. (2019) studied Viral contamination in drinking water (n=48). Microfiltration and slow sand filtration vs. Raw water was evaluated on Removal of pepper mild mottle virus (PMMoV) in log10. Microfiltration removed pepper mild mottle virus by 0.0 to >0.9 log10, while slow sand filtration removed up to 2.8 log10, though its efficiency decreased to 0.0-1.0 log10 under cold water temperatures.
Synapse has enriched 10 related papers. Consider them for comparative context: