Uncertainty analysis of rising sewer models with respect to input parameters and model structure using Monte Carlo simulations and computational fluid dynamics
Autor: | Domenico Santoro, Christopher T. DeGroot, Damien J. Batstone, Ahmed Khalil |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Environmental Engineering
0208 environmental biotechnology Monte Carlo method standardized regression coefficient method 02 engineering and technology computational fluid dynamics wats model 010501 environmental sciences Computational fluid dynamics 01 natural sciences Environmental technology. Sanitary engineering Settling Sanitary sewer Sensitivity (control systems) Uncertainty analysis TD1-1066 0105 earth and related environmental sciences Water Science and Technology Sewage business.industry Uncertainty Mechanics Models Theoretical 6. Clean water 020801 environmental engineering sewers Transformation (function) Scientific method Hydrodynamics Environmental science business uncertainty/sensitivity analysis Monte Carlo Method |
Zdroj: | Water Science and Technology, Vol 83, Iss 10, Pp 2486-2503 (2021) |
ISSN: | 1996-9732 0273-1223 |
Popis: | Modelling conversion processes in sewers can help minimize odour and pipe corrosion issues, but model uncertainties and errors must be understood. In this study, the Wastewater Aerobic/Anaerobic Transformation in Sewers (WATS) model is implemented in two different frameworks; 1-D (CSTR-in-series) and computational fluid dynamics (CFD) to study the uncertainties due to model parameters and its mathematical form. The 1-D model is used to conduct uncertainty/sensitivity analysis using Monte Carlo simulations. Time-averaged outputs were represented using a general linearized model to quantify the importance of specific parameters. The sulfide formation rate per unit area of the biofilm is the most influential parameter. Parameters controlling anaerobic hydrolysis and fermentation are also significant. Uncertainty due to model structure is studied using CFD to explore the influences of non-homogeneous surface reactions and solids settling. These showed that the 1-D model provides a reasonable characterisation of the process for simple flows in pressure mains. HIGHLIGHTS Monte Carlo simulations reveal the most important parameters in sewer model.; Sulfide formation, anaerobic hydrolysis, fermentation parameters are most significant.; Fluid dynamics simulations show biofilm reaction homogenization is appropriate.; Solids settling can be neglected in pressure mains with continuous flow. |
Databáze: | OpenAIRE |
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