TY - JOUR
T1 - Release of hydrogen sulfide under intermittent flow conditions – the potential of simulation models
AU - Matias, Natércia
AU - Matos, Rita Ventura
AU - Ferreira, Filipa
AU - Vollertsen, Jes
AU - Matos, José Saldanha
PY - 2018/2/1
Y1 - 2018/2/1
N2 - For engineering purposes it is especially useful to be able to predict and control sewer corrosion rates and odor impacts as well as to design effective measures aiming to reduce effects related to hydrogen sulfide formation and release. Doing so, it is important to use modeling tools that are capable of assessing variations of dissolved oxygen, dissolved sulfide and hydrogen sulfide gas concentrations for a wide range of environmental scenarios. Two such models were assessed: AEROSEPT, an empirical formulation, and WATS, a conceptual and more complex approach. The models were applied to evaluate the effects of transitions between pressure mains and gravity sewers in the air–liquid mass transfer of hydrogen sulfide at the Ericeira sewer system in Portugal. This network is known to have odor and corrosion problems, especially during summer. Despite the unavoidable uncertainties due to the unsteady flow rate and the quantification of air velocity and turbulence, the simulation results obtained with both models have been shown to adequately predict the overall behavior of the system.
AB - For engineering purposes it is especially useful to be able to predict and control sewer corrosion rates and odor impacts as well as to design effective measures aiming to reduce effects related to hydrogen sulfide formation and release. Doing so, it is important to use modeling tools that are capable of assessing variations of dissolved oxygen, dissolved sulfide and hydrogen sulfide gas concentrations for a wide range of environmental scenarios. Two such models were assessed: AEROSEPT, an empirical formulation, and WATS, a conceptual and more complex approach. The models were applied to evaluate the effects of transitions between pressure mains and gravity sewers in the air–liquid mass transfer of hydrogen sulfide at the Ericeira sewer system in Portugal. This network is known to have odor and corrosion problems, especially during summer. Despite the unavoidable uncertainties due to the unsteady flow rate and the quantification of air velocity and turbulence, the simulation results obtained with both models have been shown to adequately predict the overall behavior of the system.
KW - Air–water mass transfer
KW - Hydrogen sulfide gas
KW - Intermittent discharges
KW - Modeling
KW - Turbulence
KW - Air–water mass transfer
KW - Hydrogen sulfide gas
KW - Intermittent discharges
KW - Modeling
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=85042229839&partnerID=8YFLogxK
U2 - 10.2166/wst.2017.595
DO - 10.2166/wst.2017.595
M3 - Journal article
SN - 0273-1223
VL - 77
SP - 777
EP - 787
JO - Water Science and Technology
JF - Water Science and Technology
IS - 3
ER -