Disadvantages of the Gravity Draining, Air Drying Bed
Requires at least 3-4 days between operating cycles at loadings of +/- 12” of liquid
Requires large surface area of media to process solids load
Typically only produces 8-10% solids for most bio-solids, with recommended cycle time of one week
Care required by loader operator not to damage plates
Periodic removal of plates necessary to clean solids buildup due to passing through the slots