Normalization of Wastewater Quality to Estimate Infiltration/Inflow and Mass Flows of Metals
Publication: Journal of Environmental Engineering
Volume 142, Issue 11
Abstract
The quality of wastewater varies between catchments due to variation in urbanisation, sewer system properties, and pollution levels. This study was conducted to identify wastewater quality parameters that could be normalized to estimate levels of infiltration/inflow (I/I) in selected catchments and to investigate the geographic origins of metals entering sewer systems. Two sampling campaigns were conducted in the five catchments of the Gothenburg area focusing on 14 water quality parameters. Data from a reference study on domestic wastewater quality to normalize the mass flows associated with pure domestic wastewater was applied. The level of dilution due to I/I in wastewater entering Rya Wastewater Treatment Plant, estimated using Tot-N and Tot-P as indicators, provided the closest fit among the water quality parameters with results obtained by established methods for the two campaigns. The results from the study also indicated which catchments generated nondomestic wastewater with higher mass flows of specified metals.
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Acknowledgments
This study has been supported by Gryaab AB. The authors also would like to thank Lena Blom and Helene Ander at Kretslopp och Vatten, City of Gothenburg for providing background material on the catchments included in the study.
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Published In
Journal of Environmental Engineering
Volume 142 • Issue 11 • November 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Sep 16, 2015
Accepted: Jan 19, 2016
Published online: Apr 27, 2016
Discussion open until: Sep 27, 2016
Published in print: Nov 1, 2016
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