Patent · US Active

Method and apparatus for nitrogen removal in wastewater treatment

US9340439B2 · kind B2 · utility

0Cited by

7References

12Claims

0Family size

Assignees

D.C. Water and Sewer Authority · US
Hampton Roads Sanitation District · US

Inventors

Bernhard Wett · Innsbruck, AT
Ahmed Omari · Washington, US
Pusker Regmi · Virginia Beach, US
Mark A. Miller · Hutchinson, US
Charles Bott · Virginia Beach, US
Sudhir N. Murthy · Herndon, US

Key dates

Filing date	Sep 13, 2013
Grant date	May 17, 2016
Priority date	—
Expiry date	May 14, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC02F2209/22
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A reactor and control method thereof for nitrogen removal in wastewater treatment achieves a measured control of maintaining high ammonia oxidizing bacteria (AOB) oxidation rates while achieving nitrite oxidizing bacteria (NOB) repression, using various control strategies, including: 1) ammonia and the use of ammonia setpoints, 2) operational DO and the proper use of DO setpoints, 3) bioaugmentation of a lighter flocculant AOB fraction, and 4) proper implementation of transient anoxia within a wide range of reactor configurations and operating conditions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.