Efforts to control odors from sewage treatment
facilities are on the rise as residential areas continue to
expand. Historically, odor treatment revolved around adsorption
(activated carbon), absorption (chemical wet scrubbing) and
biotechnology (bio filters). All are effective to some degree when
applied correctly, but each has specific limitations inherent to the
process.
Recent innovations in activated carbon media and system design offer
municipalities new options. Ultimately, a range of
application-specific factors should be considered — flow rate,
contaminant concentration, space requirements, downtime and
maintenance, operational hazards and disposal of spent materials
— before selecting any odor treatment technology.
Authors: Leo P. Zappa, Calgon Carbon
Corporation, Pittsburgh, Pennsylvania, USA.
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