Specialists in the Control of Odors and Corrosion in Sewer Systems and Wastewater Treatment Plants.

CONTAINING ODORS

The control of odors from wastewater treatment facilities often requires the use of covers or enclosures to contain the odors prior to treatment and dispersion.  The objectives of odor containment are as follows:

• prevent the escape of odorous gas to the atmosphere
• minimize the volume of air to be treated
• allow reasonable access to process for inspection and maintenance
• ensure worker safety

The table below provides a summary of various types of containment alternatives applicable to wastewater treatment facilities.  These range from simple, flat plates to large geodesic domes.  Common materials of construction include aluminum, fiberglass reinforced plastic (FRP), concrete, and synthetic membranes.

SUMMARY OF ODOR CONTAINMENT OPTIONS
Type Applications Advantages Disadvantages
Flat plates Channels, grit chambers, effluent launders Minimizes air volume for treatment Reduces access; may accelerate corrosion; limited spans
Flat plates with integral or external reinforcement Longer spans -- e.g. aeration basins, rectangular primary clarifiers Minimizes air volume for treatment Reduces access; may accelerate corrosion
Full domes Circular clarifiers, thickeners, holding tanks Easily accessible by workers Results in very high air volumes requiring treatment; high capital cost
Low-profile domes or arches RBCs, clarifiers, sludge holding tanks, thickeners Reduced air volumes More limited access to process
Domes with suspended ceilings Circular clarifiers, thickeners, holding tanks Somewhat reduced air volumes; easily accessible by workers High capital cost
Equipment enclosures Sludge dewatering and conveyance equipment, screens, mixing tanks, etc. Minimizes air volumes; improves working conditions Access to equipment may be somewhat more difficult.