A sewer process model as planning and management tool--hydrogen sulfide simulation at catchment scale

The collection system of a major city at the Persian Gulf was simulated for bulk water hydrogen sulfide and the release of sewer gas to the urban atmosphere. Geometry data on 870 km of sanitary sewer and data on dry weather flow entering all nodes in the catchment was exported from a Mike Urban data...

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Bibliographic Details
Published in:Water science and technology 2011-01, Vol.64 (2), p.348-354
Main Authors: Vollertsen, J, Nielsen, L, Blicher, T D, Hvitved-Jacobsen, T, Nielsen, A H
Format: Article
Language:English
Subjects:
Biological activity
Calibration
Catchment area
Catchment scale
Computer simulation
Control equipment
Data
Flowmeters
Freshwater
Gas sensors
Gauges
Hydrogen sulfide
Hydrogen Sulfide - chemistry
Hydrogen sulphide
Iron
Measuring instruments
Models, Theoretical
Monitoring
Monitoring systems
Salts
Sewage
Sewer gas
Spectrometers
Sulphides
Ultraviolet radiation
Urban atmosphere
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Summary:The collection system of a major city at the Persian Gulf was simulated for bulk water hydrogen sulfide and the release of sewer gas to the urban atmosphere. Geometry data on 870 km of sanitary sewer and data on dry weather flow entering all nodes in the catchment was exported from a Mike Urban database and imported to the sewer process model WATS. The process model then routed sewage and sewer gas through the system and simulated relevant physical, chemical and biological processes. In its non-calibrated state, the model was used as a planning tool to identify problem areas and to identify locations to install monitoring equipment and make preliminary choices for control strategies in terms of dosing of nitrate and iron salts. The monitoring equipment consisted of flow meters, level gauges, UV-Vis spectroscopes, and H2S gas sensors. Data from the first set of installed monitoring equipment were applied to calibrate and validate the model. It was illustrated how the calibrated model can be applied to assess compliance with quantitative formulated service levels and to design control strategies in terms of dosing of iron and nitrate salts.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2011.717