Mathematical Modelling of In-Sewer Processes as a Tool for Sewer System Design

Gaspare Viviani, Giorgio Mannina, Paolo S. Calabrò

Research output: Chapter in Book/Report/Conference proceedingChapter


The objective of this paper is to evaluate the potential impact of insewer processes (COD components transformation and hydrogen sulphideproduction) on the design of sewer systems. The tool used for such analysis is amathematical model derived from the WATS model (WastewaterAerobic/anaerobic Transformation in Sewers) able to describe the processesoccurring in the sewer system both under aerobic and anaerobic conditions. Themodel is applied to three catchments with, respectively, 10,000, 50,000 and250,000 inhabitants connected to gravity sewer systems different in terms oftype (separate or combined), slope, length, travel time, wastewater temperature.The simulation results enable to assess the effect of the in sewer transformationsin terms of hydrogen sulphide formation and transformation of the biodegradable organic matter that is necessary for biological nutrients removal at theWWTP.
Original languageEnglish
Title of host publicationSpringer Nature Switzerland AG 2019 G. Mannina (Ed.): UDM 2018, GREEN
Number of pages6
Publication statusPublished - 2019

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Management, Monitoring, Policy and Law
  • Industrial and Manufacturing Engineering


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