Back to results
US 7,547,394 B2Granted
Wastewater treatment with aerobic granules
AssigneeZenon Technology Partnership
InventorPierre Lucien Cote
Life of this patent
Estimating the term…
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.
Claims7
A method of treating wastewater comprising steps of:
- a. providing a set of sequencing batch reactors;
- and
- b. feeding wastewater through a bed of granules in each reactor for a feed time, the feed time being part of a cycle time for each reactor;
- wherein the feed time for each reactor multiplied by the number of reactors is generally equal to the cycle time for each reactor.
1 more element
A method of treating wastewater comprising,
- (a) feeding wastewater to a zone having 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:
- (e) withdrawing treated wastewater from the zone;
- (f) mixing the granules and the wastewater during steps (b) and (c);
- and,
- (g) halting mixing the granules and the wastewater during step (d) to settle the granules.
5 more elements
Dependencies are inferred from the claim text.