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. 2021 Feb 2;772:145268. doi: 10.1016/j.scitotenv.2021.145268

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© 2021 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 1 — Simplified description of Ourense WWTP layout and sampling points (circled numbers corresponding to Table 2 labels) in the water and sludge line. Measured flowrates (in m³/d) during a representative dry weather period (here taken as 21st April) are shown next to the corresponding streams and nominal residence times are next to the corresponding unit.