Back to results
US 5,846,274 AGranted
Manhole biofilter
AssigneeCity of Albuquerque
InventorSherisse R. Smelser
Life of this patent
Estimating the term…
Abstract
A biofilter for use in a manhole of a sanitary sewer system which allows sewer gases to escape from the system driven by the pressure differential between the aboveground atmosphere and the underground pressure. Sewer gases are chemically changed by their passage through the compost filter media, and odors associated with the gases are thereby eliminated.
Claims15
A biofilter for use inside a neck of a manhole of a sanitary sewer system, said biofilter comprising:
- air-permeable basket means for holding a loose filter media inside said basket means;
- means for removably positioning said basket means in the neck of the manhole;
- and
- means for providing two-directional flow of gas upward and downward through said filter media.
1 more element
Dependencies are inferred from the claim text.