Journal
BIORESOURCE TECHNOLOGY
Volume 101, Issue 6, Pages 1762-1768Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2009.10.032
Keywords
Anaerobic ammonium oxidation (Anammox); Organic matter; Denitrification; Substrate competition; Electron acceptor
Funding
- Natural Science Foundation of China [30770039]
- National High-Tech Research and Development Plant of China [2006AA06Z332]
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The effect of organic matter on the nitrogen removal performance of anaerobic ammonium oxidation (Anammox) process was investigated in an upflow anaerobic sludge blanket (UASB) reactor fed with nitrogen loading rate of 13.92 kg N m(-3) day(-1) at an HRT of 0.83 h. Mass balance showed that the heterotrophic denitrification prevailed in the UASB reactor, and became the dominant reactions when high influent COD/NO2--N ratios of 2.92 were applied. The Anammox bacterial growth was significantly suppressed by denitrifying communities under high organic matter content due to the weaker competition for nitrite (electron acceptor) and living space. Long-term operation of the Anammox UASB reactor under relatively high organic content resulted in weak recovery performance. (C) 2009 Elsevier Ltd. All rights reserved.
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