System and Method for Indirect Measurement of Oxygen Utilization Rate and Influent Load for Aeration Control
AssigneeXylem Water Solutions U.S.A., Inc.
InventorsDennis Barnes, Wenjun Liu
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Abstract
A method of optimizing a wastewater treatment plant includes: providing an oxidation ditch having a dissolved oxygen set-point and including: an aeration system having an aerobic zone; and an anoxic zone; measuring the oxidation-reduction potential of the anoxic zone; and based on the measured oxidation-reduction potential: increasing or decreasing the dissolved oxygen set-point; increasing or decreasing a dose of supplemental nutrients; and/or increasing a dose of supplemental carbon or metal salts.
Claims19
A method of optimizing a wastewater treatment plant, comprising:
- providing an oxidation ditch having a dissolved oxygen set-point and comprising:
- an aeration system comprising an aerobic zone;
- and
- an anoxic zone;
- measuring the oxidation-reduction potential of the anoxic zone;
- and
- based on the measured oxidation-reduction potential:
- increasing or decreasing the dissolved oxygen set-point;
- increasing or decreasing a dose of supplemental nutrients;
- and/or
- increasing a dose of supplemental carbon or metal salts.
A wastewater treatment plant system, comprising:
- an inlet zone;
- an oxidation ditch having a dissolved oxygen set-point and comprising:
- an aeration system comprising an aerobic zone;
- and
- an anoxic zone comprising an oxidation-reduction potential probe;
- and
- wherein the dissolved oxygen set-point is varied and/or in response to receiving more or less intermittent influent that is nutrient or carbon deficient, a dose of supplemental nutrients or carbon or metal salts is varied, based on measurements from the oxidation-reduction potential probe.
A method of optimizing a wastewater treatment plant, comprising:
- providing a first reactor comprising a non-aerated anoxic zone and one or more downstream aeration reactors connected to the first reactor, wherein a mixed liquor containing oxygen is recirculated from the downstream aeration reactors to the first reactor;
- measuring the oxidation-reduction potential of the anoxic zone;
- and
- based on the measured oxidation-reduction potential:
- increasing or decreasing a dissolved oxygen set-point in the one or more downstream aeration reactors;
- and/or
- in response to receiving more or less intermittent influent that is nutrient deficient, increasing or decreasing, respectively a dose of supplemental nutrients;
- and/or
- in response to receiving more or less intermittent influent that is carbon deficient, increasing or decreasing, respectively a dose of supplemental carbon and/or metal salts.
Dependencies are inferred from the claim text.