Recirculation of fully nitrified effluent from a laboratory horizontal-flow biofilm reactor (HFBR) to a mixed pre-denitrification reactor (DR) was used to remove organic carbon and nitrogen from synthetic dairy wastewater. Three recirculation ratios of 2, 4, and 6 were examined in this study and the average filtered chemical oxygen demand (CODf) and total nitrogen (TN) removals were up to 97.4% and 85.5%, respectively, at 11 °C. In the DR, the nitrate nitrogen removal efficiencies and rates were 86-96% and 22-34 g N/m3 d. In the HFBR, the ammonium nitrogen removal rates were 293-337 mg N/m2 d. © 2006 Elsevier Ltd. All rights reserved.
CITATION STYLE
Xiao, L. W., Rodgers, M., & Mulqueen, J. (2007). Organic carbon and nitrogen removal from a strong wastewater using a denitrifying suspended growth reactor and a horizontal-flow biofilm reactor. Bioresource Technology, 98(4), 739–744. https://doi.org/10.1016/j.biortech.2006.04.015
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