id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-296661-6ndn2qxc	Lu, Dingnan	Primary concentration – The critical step in implementing the wastewater based epidemiology for the COVID-19 pandemic: A mini-review	2020-07-25		.txt	text/plain	6214	304	42	This review provides new insights into the primary concentration methods that have been adopted by the eighteen recently reported COVID-19 wastewater detection studies, along with a brief discussion of the mechanisms of the most commonly used virus concentration methods, including the PEG-based separation, electrostatically charged membrane filtration, and ultrafiltration. The PEG-based separation is the most used technique (7 out of 18) among all concentration methods, and all four studies that adopted this concentration method showed positive results regarding the SARS-CoV-2 detection in wastewater samples (Bar Or et al., 2020; Hata et al., 2020; La Rosa et al., 2020b; Wu et al., 2020) . As previously mentioned, using electrostatically charged membranes filtration to concentrate viruses from turbid water, such as raw wastewater, can be subject to a significant reduction of virus recovery efficiency due to the presence of organic matter and high turbidity, which can lead to a preferential attachment to the charged filters and raise the risk of detrimental clogging.	./cache/cord-296661-6ndn2qxc.txt	./txt/cord-296661-6ndn2qxc.txt