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US 12,365,614 B2Granted
Method for wastewater treatment
AssigneeInland Environmental Resources, Inc.
InventorDouglas G. Kelley
Life of this patent
Estimating the term…
Abstract
Compositions, systems, and methods of using alkaline-producing Aluminate salts in the sludge collection and digestion steps of zoo wastewater processing to reduce acidity and/or build alkalinity, reduce hydrogen sulfide release, and reduce phosphate in the effluent.
Claims3
A method of reducing gaseous hydrogen sulfide production from an anaerobic waste water sludge comprising:
- adding an effective amount of an alkaline aluminum-containing chemical having a pH of at least about 11 to the anaerobic waste water sludge prior to entering anaerobic digester or in the anaerobic digester, where the addition of the effective amount of the alkaline aluminum-containing chemical occurs at a feed point, and further wherein the feed point is into an influent stream, wherein the influent stream introduces the anaerobic waste water sludge into the anaerobic digester.
A method of reducing gaseous hydrogen sulfide production from an anaerobic waste water sludge comprising:
- adding an effective amount of an alkaline aluminum-containing chemical having a pH of at least about 11 to the anaerobic waste water sludge nor to entering an anaerobic digester or in the anaerobic digester, where the addition of the effective amount of the alkaline aluminum-containing chemical occurs at a feed point, and further wherein the feed point is into a recirculation stream that recirculates the anaerobic waste water sludge within the anaerobic digester.
Dependencies are inferred from the claim text.