Method and apparatus for maximizing nitrogen removal from wastewater
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United States of America Patent
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Oct 18, 2016
Grant Date -
Apr 3, 2014
app pub date -
Oct 1, 2013
filing date -
Oct 1, 2012
priority date (Note) -
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Abstract
A reactor and control method thereof to maximize nitrogen removal and minimize aeration requirement through control of transient anoxia and aerobic SRT, repression of NOB, and control of dynamic DO concentrations or aeration interval by keeping the reactor NH4 and NOx concentrations approximately equal has been proposed. Controls described in this invention maximizes the potential for TIN removal through nitrification, limited nitritation, nitritation, denitrification, limited denitritation, denitritation making use of 1) real time measurement of ammonia, nitrite, nitrate, 2) operational DO and the proper use of DO setpoints, and 3) proper implementation of transient anoxia within a wide range of reactor configurations and operating conditions.
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