Invention Grant
- Patent Title: Using continuous nitrate measurement to control aeration in an aerated-anoxic process
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Application No.: US14357595Application Date: 2012-11-16
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Publication No.: US09758410B2Publication Date: 2017-09-12
- Inventor: Michael L. Doyle , Michael Casey Whittier
- Applicant: Evoqua Water Technologies LLC
- Applicant Address: US PA Warrendale
- Assignee: Evoqua Water Technologies LLC
- Current Assignee: Evoqua Water Technologies LLC
- Current Assignee Address: US PA Warrendale
- International Application: PCT/US2012/065524 WO 20121116
- International Announcement: WO2013/074929 WO 20130523
- Main IPC: C02F3/00
- IPC: C02F3/00 ; C02F3/30 ; C02F3/08 ; C02F3/12

Abstract:
A method and system for treating wastewater is disclosed. In one embodiment the method includes introducing the wastewater into an aerated anoxic treatment unit, flowing an oxygen containing gas into the wastewater in the aerated anoxic treatment unit at a first flow rate, measuring a concentration of a nitrogen species in the wastewater in the aerated anoxic treatment unit, comparing the measured concentration of the nitrogen species to a target nitrogen species concentration, adjusting the flow of the oxygen containing gas into the wastewater in the aerated anoxic treatment unit to a second flow rate in response to a difference in the nitrogen species and the target nitrogen species concentrations, and maintaining the second flow rate for a time period sufficient for the wastewater to be treated in the aerated anoxic treatment unit and form an anoxically treated liquid having a reduced concentration of the nitrogen species.
Public/Granted literature
- US20140319055A1 Using Continuous Nitrate Measurement to Control Aeration in an Aerated-Anoxic Process Public/Granted day:2014-10-30
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