Manhole biofilter

Details Manhole biofilter Manhole biofilter

1997-07-28

1998-12-08

Woo, Jay H.

Gas separation

Flexible or collapsible bag type

Seaming, reinforcing or bag structure

553852, 55479, B01D 4630

Patent

active

058462740

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.

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patent: 4662900 (1987-05-01), Ottengraf
patent: 4734111 (1988-03-01), Hoffmann et al.
patent: 5316569 (1994-05-01), Heunermund
patent: 5431808 (1995-07-01), Zumbragel
patent: 5527454 (1996-06-01), Ponte et al.

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