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Modelling the long-term effect of wastewater compositions on maximum sulfide and methane production rates of sewer biofilm.
- Source :
-
Water Research . Feb2018, Vol. 129, p58-65. 8p. - Publication Year :
- 2018
-
Abstract
- Reliable modelling of sulfide and methane production in sewer systems is required for efficient sewer emission management. Wastewater compositions affect sulfide and methane production kinetics through both its short-term variation influencing the substrate availability to sewer biofilms, and its long-term variation affecting the sewer biofilm structure. While the short-term effect is well considered in existing sewer models with the use of Monod or half-order equations, the long-term effect has not been explicitly considered in current sewer models suitable for network modelling. In this study, the long-term effect of wastewater compositions on sulfide and methane production activities in rising main sewers was investigated. A detailed biofilm model was firstly developed, and then calibrated and validated using experimental data measured during the entire biofilm development period of a laboratory sewer reactor. Based on scenario simulations using the detailed biofilm model, empirical equations describing the long-term effect of sulfate and sCOD (soluble chemical oxygen demand) concentrations on k H2S (the maximum sulfide production rate of sewer biofilm) and k CH4 (the maximum methane production rate of sewer biofilm) were proposed. These equations require further verification in future studies before their potential integration into network-wide sewer models. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00431354
- Volume :
- 129
- Database :
- Academic Search Index
- Journal :
- Water Research
- Publication Type :
- Academic Journal
- Accession number :
- 127284753
- Full Text :
- https://doi.org/10.1016/j.watres.2017.11.007