Performance Evaluation of Sewer System Upgrade in an Old Residential Area in Ningbo, China
Publication: Journal of Environmental Engineering
Volume 148, Issue 8
Abstract
The aging of sewer networks in old residential neighborhoods in China causes frequent problems with their integrity and functionality, such as sanitary sewer overflows and hydraulic overloading of wastewater treatment plants. In order to assess the performance of the sewer system in an old residential area in Ningbo, China, and to evaluate the effectiveness of the sewer system upgrade, the sewer system was continuously monitored for about 8 months. The quantity and quality of wastewater were comprehensively analyzed. The rainfall-derived inflow and infiltration (RDII) characterization was identified in the sewershed by using the method and the triangle method. The before and after the sewer upgrade were about 28% and 7%, respectively. The effects of the sewer upgrade were also quantified through comparing the concentration of pollutants before and after the program. The findings of this study will help to understand the performance of small-scale urban drainage systems, especially in old residential areas and/or in developing countries, and to provide guidance for future system upgrades.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published paper.
Acknowledgments
This work was partially funded by the Natural Science Foundation of Ningbo (202003N4134), the Natural Science Foundation of Zhejiang Province (LY21E090003), the Key Research and Development Program of Zhejiang Province (2020C03082), and the Fundamental Research Funds for the Provincial Universities of Zhejiang (SJLZ2021004).
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Information & Authors
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Published In
Journal of Environmental Engineering
Volume 148 • Issue 8 • August 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Mar 14, 2022
Accepted: Apr 12, 2022
Published online: Jun 10, 2022
Published in print: Aug 1, 2022
Discussion open until: Nov 10, 2022
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