Back to results
US 9,067,812 B1Granted
Methods for managing sulfide in wastewater systems
OwnerHenry Wilmore Cox, Jr.inventor
Life of this patent
Estimating the term…
Abstract
Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to, in a treatment zone, reacting an oxygen-comprising gas, one or more selected ferric/ferrous chelates, one or more selected nitrates and/or nitrites, and/or anaerobic wastewater.
Claims31
A method comprising:
- in a treatment zone of a manmade container, reacting one or more selected ferric/ferrous chelates, an anaerobic aqueous solution, and an oxygen-comprising gas and/or one or more selected nitrates and/or nitrites,
- wherein:
- a mass-to-mass ratio of oxygen in the oxygen-comprising gas when entering the treatment zone to available sulfide in the anaerobic aqueous solution when entering the treatment zone is at least approximately 1.5 and less than approximately 3.0;
- and
- when entering the treatment zone, a concentration of the one or more selected ferric/ferrous chelates is in a range of approximately 0.004 M per 1.0 M of sulfide to approximately 0.02 M per 1.0 M of sulfide.
2 more elements
A method comprising:
- in a treatment zone of a manmade container, reacting one or more selected ferric/ferrous chelates, an anaerobic aqueous solution, and an oxygen-comprising gas and/or one or more selected nitrates and/or nitrites,
- wherein:
- a mass-to-mass ratio of oxygen in the oxygen-comprising gas when entering the treatment zone to available sulfide in the anaerobic aqueous solution when entering the treatment zone is at least approximately 1.5 and less than approximately 3.0;
- and
- a concentration of the one or more selected nitrates and/or nitrites, when within the treatment zone, and a concentration of the one or more selected ferric/ferrous chelates when entering the treatment zone, are sufficient to reduce available sulfide in the anaerobic aqueous solution.
2 more elements
Dependencies are inferred from the claim text.