Method and system for improved biological nitrification of wastewater at low temperature
June 25, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNitrification-denitrification of wastewater Removal of phosphates and BOD from wastewaters Process for treating wastewater Method and apparatus for increasing sludge concentration in water purification installations Biological dephosphatization and (de)nitrification Wastewater treatment with enhanced biological phosphorus removal and related purification processes Filter element with regenerable bulk material filling and method for making same Method and apparatus for treating waste water Patent #: 5356537 InventorApplicationNo. 882607 filed on 06/25/1997US Classes:210/605, Anaerobically, with subsequently aerobically treating liquid210/607, Dividing, treating, and recombining liquid210/622, Of separated liquid210/625, Treating outside mainstream210/903NitrogenousExaminersPrimary: Upton, ChristopherAttorney, Agent or FirmInternational ClassC02F 003/30AbstractThe present invention entails a method and system for enhancing biological nitrification in a wastewater treatment process. The process entails both a mainstream wastewater process and a sidestream process wherein the sidestream process produces an abundant supply of supplemental nitrifiers that are in turn directed into the mainstream for assisting in carrying out the nitrification process in the mainstream. Specifically, the sidestream process includes directing a liquid stream (such as a dewatering liquid) having a high ammonia concentration at an elevated temperature into a sidestream nitrification zone which is operated at conditions which maximize production of nitrifiers therein. Afterwards, the resulting nitrifiers produced in the sidestream nitrification zone are directed into the mainstream where the nitrifiers function to enhance nitrification in the mainstream and allows operation at low sludge retention time conditions where nitrification otherwise could not be sustained.Other References
Field of SearchAnaerobically, with subsequently aerobically treating liquidDividing, treating, and recombining liquid And regulating temperature during biological step Of separated liquid And returning to or withdrawing from diverse treating zones Treating outside mainstream To mainstream oxygenation (e.g., activated sludge, etc.) And anaerobic treatment Nitrogenous Serially connected distinct treating or storage units With sediment recycle means directly to main stream Diverse type Diverse | |
