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http://dx.doi.org/10.4491/KSEE.2013.35.4.294

Partial Nitritation in an SBR Reactor by Alkalinity Control  

Lee, Chang-Kyu (Construction Environmental Research Division, Water Resources & Environment Research Department, Korea Institute of Construction Technology)
Publication Information
Journal of Korean Society of Environmental Engineers / v.35, no.4, 2013 , pp. 294-300 More about this Journal
Abstract
In this study, major parameter of partial nitritation was investigated for the stable operation. In order to establish partial nitritation system, prevailing parameters such as temperature, BA (bicarbonate alkalinity) and pH were evaluated. As a result, it is inferred that appropriate bicarbonate alkalinity ratio (mg $NaHCO_3{\cdot}L^{-1}/mg$ Inf. $NH_4{^+}-N{\cdot}L^{-1}$) drives stable 50% partial nitritation at $32^{\circ}C$ and ambient temperature, respectively. Alkalinity ratio was proposed as new strategy for 50% partial nitritation without pH control in both temperature regimes. Because of the results, it was added amound of BA required only for 50% nitritation to inhibit nitratation. The effluent $NO_2{^-}-N/NH_4{^+}-N$ ratio reached almost 100% when initial bicarbonate alkalinity ratios (mg $NaHCO_3{\cdot}L^{-1}/mg$ Inf. $NH_4{^+}-N{\cdot}L^{-1}$) were 6.8 (R1) and 6.7 (R2), respectively. Polymerase chain reaction and denaturing gradient gel electrophoresis (PCR-DGGE) results demonstrated that AOB was the dominant nitrifying bacteria and NOB was negligible after adopting process control.
Keywords
Partial Nitritation; ANAMMOX; AOB; NOB; Alkalinity;
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Times Cited By KSCI : 1  (Citation Analysis)
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