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US 11,377,380 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 wastewater processing to reduce acidity and/or build alkalinity, reduce hydrogen sulfide release, and reduce phosphate in the effluent.
Claims9
A method of reducing gaseous H2S production from anaerobic waste water sludge comprising:
- in a sewage treatment plant, adding an effective amount of an alkaline form of an aluminum containing chemical to a waste water sludge to which no aluminum-containing chemical had been added, wherein the alkaline aluminum-containing chemical is selected from the group consisting of sodium aluminate, potassium aluminate, and mixtures thereof, wherein the addition of the alkaline aluminum-containing chemical occurs at a feed point, wherein the feed point is either immediately prior to an anaerobic digester or directly into an anaerobic digester.
Dependencies are inferred from the claim text.