Assessment of odour impact at a sewage treatment plant

Abstract

For small, urbanized city such as Singapore, where land is a scarce commodity, much of the effort and money are directed towards the control of odorous emissions at sewage treatment plants so as to minimize the expensive buffer zones typically set aside for such facilities. All existing process units in a number of municipal wastewater treatment plants in Singapore are being upgraded into covered units and odorous air within each covered unit are collected and treated at odor treatment scrubbers. In order to illustrate the impact of the cover and treatment strategy at one of the wastewater plants, modeling of the dispersion of hydrogen sulfide (H2S) is carried out for the conditions before and after the various process units are covered.