Title: Assessment of the water quality of rainfall collected from State University of Rio de Janeiro in the Maracanã district

Authors: Gabrielle Nunes Da Silva; Isabella Escobar Dos Santos; Rayssa Vogeler Berquó Jacob; Roberta Santos De Souza; Lívia De Oliveira Ganem; Daniele Maia Bila; Sergio Machado Corrêa; Alfredo Akira Ohnuma Jr.

Addresses: Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil ' Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil ' Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil ' Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil ' Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil ' Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil ' Faculty of Technology, State University of Rio de Janeiro, 20537-000 Resende, RJ, Brazil ' Faculty of Engineering, State University of Rio de Janeiro, 20559-900 Rio de Janeiro, RJ, Brazil

Abstract: The composition of rainwater is influenced by natural and anthropogenic sources. Here we evaluate the water after passage through a rainwater capture system (SAP) installed in the State University of Rio de Janeiro (UERJ), Rio de Janeiro in the period from November 2016 to April 2017, at points defined as first-flush 1, first-flush 2 and dead water. The fundamental parameters were pH, conductivity, total dissolved solids and turbidity by turbidimeter and multiparameter probe. It is verified that the quality of the rainwater is changed after passing through the catchment system, the results of the physical-chemical analysis indicated nonconformity with the Municipal Law of Niterói (2856/2011) and of the NBR (Brazilian Regulatory norms) 15527 standards, mainly for turbidity of 5 UNT. Microfiltration is suggested for turbidity equation. It is also recommended that an in-depth analysis should be conducted of the quality of the rainfall to characterise the samples of microbiological parameters, pollutants and metals.

Keywords: water quality; rainwater harvesting; first flush.

DOI: 10.1504/IJEE.2021.118447

International Journal of Environmental Engineering, 2021 Vol.11 No.2, pp.132 - 143

Received: 22 Jan 2020
Accepted: 19 Nov 2020
Published online: 26 Oct 2021 *

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