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http://dx.doi.org/10.15681/KSWE.2011.27.6.4

The Evaluation of Temperature Effects on Biofilm Nitritation System with Various Organic and Solid Concentrations for High Strength Reject Water Treatment  

Lee, Hansaem (Department of Environmental Engineering, Korea University)
Lee, Sangil (Korean Environment Institute)
Yun, Zuwhan (Department of Environmental Engineering, Korea University)
Publication Information
Journal of Korean Society on Water Environment / v.27, no.6, 2011 , pp. 769-775 More about this Journal
Abstract
An experimental study of biofilm nitritation system for high-strength ammonium wastewater has been carried out to examine the temperature effect on different organic and solid concentration. Operating temperature varied from $35^{\circ}C$ to $15^{\circ}C$. The influent N concentration of identical three reactors was adjusted to about $300mg\;NH_4-N/L$. A control unit fed with a synthetic wastewater, while the others were fed with reject water which is consisted of the supernatant of both digester and thickener. The results indicated that nitrite accumulation was stable in temperature range of $35^{\circ}C$ to $25^{\circ}C$. However, nitritation was significantly reduced at below $20^{\circ}C$. Free ammonia (FA) and free nitrous acid (FNA) were major inhibitors to the nitrite oxidizer for nitrite accumulation in lower temperature. From the estimation of temperature coefficient (${\Theta}$) of biofilm and suspended nitritation system, biofilm nitritation system could absorb the negative temperature effect compared with suspended nitritation system.
Keywords
Biofilm; Nitritation; Reject water; Temperature effect;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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