Abstract
Odorous air from the dissolved air flotation (DAF) unit of a wastewater treatment plant was scrubbed through an activated carbon column and air samples analysed by gas chromatographic‐mass spectrometric techniques. Chromatographic profiles of the gases emitted at the DAF units were obtained. Compounds identified included mainly the aliphatic hydrocarbons from C9 to C14. The odorous compounds detected were toluene, meta‐, para‐ and ortho‐xylenes, phenol, dimethyl disulphide and dimethyl trisulphide, alkyl benzenes and chlorinated hydrocarbons such as chloroethylene and chlorobenzenes. Phenol and toluene were found to be the most dominant compounds detected.
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