An extensive measuring campaign targeted on sewer odor problems was undertaken in San Francisco. It was assessed whether a conceptual sewer process model could reproduce the measured concentrations of total sulfide in the wastewater and H2S gas in the sewer atmosphere, and to which degree such simulations have potential for further improving odor and sulfide management. The campaign covered measurement of wastewater sulfide by grab sampling and diurnal sampling, and H2S gas in the sewer atmosphere was logged. The tested model was based on the Wastewater Aerobic/Anaerobic Transformations in Sewers (WATS) sewer process concept, which never had been calibrated to such an extensive dataset. The study showed that the model was capable of reproducing the general levels of wastewater sulfide, wastewater pH, and sewer H2S gas. It could also reproduce the general variability of these parameters, albeit with some uncertainty. It was concluded that the model could be applied for the purpose in mind.
A detailed measuring campaign targeted on hydrogen sulfide (H 2 S) was undertaken in the Bayside drainage area of San Francisco. The purpose was to assess whether a conceptual sewer process model could reproduce H 2 S concentrations and other wastewater characteristics to a level where it could be applied to further improve odor and H 2 S management. The campaign covered 12 locations in the drainage area and included measurements in the wastewater as well as the sewer atmosphere. The tested model was based on the WATS sewer process concept, which previously had yielded promising results for catchment scale modelling, but never been calibrated to such an extensive dataset. The study showed that the model was capable of reproducing the general levels of wastewater H 2 S concentrations, wastewater pH values, and sewer H 2 S gas levels. It could also reproduce the general variability of these parameters, albeit with some uncertainty. It was consequently concluded that the model could be applied for the purpose in mind.
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