05916438 is referenced by 2 patents and cites 9 patents.

The effluent gas stream from anaerobic waste water treatment digesters is treated to remove trace amounts of hydrogen sulfide and other contaminants. The chemical equation involved relies on the reaction of hydrogen sulfide with oxygen to form water plus elemental sulfur. The removal system includes a variable control line for adding air to the effluent gas stream; a filter for removing solids, entrained liquids and bacteria from the oxygen-enriched gas stream; a blower for directing the filtered gas stream into a potassium promoted activated carbon bed wherein the above chemical reaction takes place; and sensors for measuring the content of oxygen and hydrogen sulfide at the entrance and exit of the activated carbon bed. When the hydrogen sulfide content of the exiting gas stream exceeds a predetermined level, the amount of air added to the gas stream is increased until the predetermined level of hydrogen sulfide is achieved in the exiting gas stream.

Title
Removal of hydrogen sulfide from anaerobic digester gas
Application Number
8/269518
Publication Number
5916438
Application Date
July 1, 1994
Publication Date
June 29, 1999
Inventor
Ronald J Spiegel
Chapel Hill
NC, US
Roger R Lesieur
Enfield
CT, US
Herbert C Healy
Hebron
CT, US
John C Trocciola
Glastonbury
CT, US
Agent
William W Jones
Assignee
International Fuel Cells
CT, US
IPC
B01D 53/04
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