Liquid purification or separation – Processes – Treatment by living organism
Patent
1999-04-15
1999-11-02
Upton, Christopher
Liquid purification or separation
Processes
Treatment by living organism
210614, 210631, 210758, 210916, 481275, 95 12, 95136, B01D 5352, C02F 328
Patent
active
059763736
ABSTRACT:
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.
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Healy Herbert C.
Lesieur Roger R.
Spiegel Ronald J.
Trocciola John C.
International Fuel Cells LLC
Jones William W.
Upton Christopher
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