Modelling micropollutant fate in sewer systems – A new systematic approach to support conceptual model construction based on in-sewer hydraulic retention time
| Autor: | Fabio Polesel, Zhen Zhang, Manuela Antonelli, Kerstin J. F. von Borries, Andrea Turolla, Luca Vezzaro, Riccardo Delli Compagni |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Hydraulic retention time 0208 environmental biotechnology Wastewater-based epidemiology 02 engineering and technology Wastewater 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Civil engineering Cluster analysis Emerging contaminants Geographical information system Sewer system modelling Cities Weather Waste Management and Disposal 0105 earth and related environmental sciences Sewage Conceptual model (computer science) General Medicine Wastewater based epidemiology Models Theoretical Flow pattern Mixture model 020801 environmental engineering Wastewater systems Objective approach Environmental science Sewage treatment |
| Zdroj: | Delli Compagni, R, Polesel, F, von Borries, K J F, Zhang, Z, Turolla, A, Antonelli, M & Vezzaro, L 2019, ' Modelling micropollutant fate in sewer systems – A new systematic approach to support conceptual model construction based on in-sewer hydraulic retention time ', Journal of Environmental Management, vol. 246, pp. 141-149 . https://doi.org/10.1016/j.jenvman.2019.05.139 |
| DOI: | 10.1016/j.jenvman.2019.05.139 |
| Popis: | Conceptual sewer models are useful tools to assess the fate of micropollutants (MPs) in integrated wastewater systems. However, the definition of their model structure is highly subjective, and obtaining a realistic simulation of the in-sewer hydraulic retention time (HRT) is a major challenge without detailed hydrodynamic information or with limited measurements from the sewer network. This study presents an objective approach for defining the structure of conceptual sewer models in view of modelling MP fate in large urban catchments. The proposed approach relies on GIS-based information and a Gaussian mixture model to identify the model optimal structure, providing a multi-catchment conceptual model that accounts for HRT variability across urban catchment. This approach was tested in a catchment located in a highly urbanized Italian city and it was compared against a traditional single-catchment conceptual model (using a single average HRT) for the fate assessment of reactive MPs. Results showed that the multi-catchment model allows for a successful simulation of dry weather flow patterns and for an improved simulation of MP fate compared to the classical single-catchment model. Specifically, results suggested that a multi-catchment model should be preferred for (i) degradable MPs with half-life lower than the average HRT of the catchment and (ii) MPs undergoing formation from other compounds (e.g. human metabolites); or (iii) assessing MP loads entering the wastewater treatment plant from point sources, depending on their location in the catchment. Overall, the proposed approach is expected to ease the building of conceptual sewer models, allowing to properly account for HRT distribution and consequently improving MP fate estimation. |
| Databáze: | OpenAIRE |
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