Mathematical Modelling of In-sewer Processes as a Tool for SewerSystem Design

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Abstract

The objective of this paper is to evaluate the potential impact of in-sewerprocesses (COD components transformation and hydrogen sulphide production) on thedesign of sewer systems. The tool used for such analysis is a mathematical model derivedfrom the WATS model (Wastewater Aerobic/anaerobic Transformation in Sewers) able todescribe the processes occurring in the sewer system both under aerobic and anaerobicconditions. The model is applied to three synthetic catchments with, respectively, 10,000,50,000 and 250,000 inhabitants connected to gravity sewer systems different in terms oftype (separate or combined), slope, length, travel time, wastewater temperature. Thesimulation results enable to assess the effect of the in sewer transformations in terms ofhydrogen sulphide formation and transformation of the biodegradable organic matter that isnecessary for biological nutrients removal at the WWTP.
Original languageEnglish
Pages961-964
Number of pages4
Publication statusPublished - 2018

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