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US 2007/0181493 A1Published application
Wastewater treatment with aerobic granules
AssigneeZenon Technology Partnership
InventorPierre Cote
Life of this patent
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Abstract
A wastewater treatment system using aerobic granules has a large number of sequencing batch reactor tanks with high volumetric exchange rate, a variable cycle length and constant batch volume. The batch reactors are operated for C, N removal and P is removed chemically, optionally under BioP enhanced conditions. SS are removed in a downstream separation step.
Claims4
A method of treating wastewater comprising steps of:
- a. treating wastewater anaerobically with granules;
- b. treating wastewater aerobically with granules;
- c. withdrawing anaerobic wastewater;
- d. precipitating phosphorous from the withdrawn anaerobic wastewater.
1 more element
A method of treating wastewater comprising steps of:
- a. providing a set of sequencing batch reactors each having a step of feeding wastewater through a bed of granules for a feed time as part of a cycle having a cycle time,
- wherein the feed time multiplied by the number of reactors is generally equal to the cycle time.
A method of treating wastewater comprising steps of,
- a. treating wastewater in a zone having granules;
- b. removing effluent from the zone;
- and,
- c. treating the removed effluent with a physical separation process to remove suspended solids from the removed effluent.
1 more element
A method of treating wastewater comprising,
- a. feeding wastewater to granules;
- b. treating wastewater under anaerobic conditions with the granules;
- c. treating wastewater under alternating anoxic and aerobic conditions with the granules;
- d. settling the granules;
- and,
- e. withdrawing treated wastewater.
3 more elements
Dependencies are inferred from the claim text.