Method and apparatus for nitrogen removal in wastewater treatment
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United States of America Patent
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May 17, 2016
Grant Date -
Mar 13, 2014
app pub date -
Sep 13, 2013
filing date -
Sep 13, 2012
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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.
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