Full-Scale Nitrogen Removal from Digester Liquid with Partial Nitritation and Anammox in One SBR

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• 作者：Adriano Joss ; David Salzgeber ; Jack Eugster ; Roger Knig ; Karin Rottermann ; Sabine Burger ; Peter Fabijan ; Susanne Leumann ; Joachim Mohn ; Hansruedi Siegrist
• 刊名：Environmental Science & Technology
• 出版年：2009
• 出版时间：July 15, 2009
• 年：2009
• 卷：43
• 期：14
• 页码：5301-5306
• 全文大小：175K
• 年卷期：v.43,no.14(July 15, 2009)
• ISSN：1520-5851

文摘

Full-scale application of partial nitritation and anammox in a single suspended-growth sequencing batch (SBR) reactor presented here confirm the process suitable for removing nitrogen from ammonium-rich wastewater with low concentrations of BOD and suspended solids: details of simple and robust process control based on online ammonium or conductivity signals are discussed by describing the full-scale startup at three municipal plants (five reactors in total). Ammonium oxidation rates of up to 500 gN m⁻³d⁻¹ with conversion to N₂ of over 90% are achieved in a full-scale plant, but pilot results indicate that significantly higher rates are feasible. With continuous aeration at dissolved oxygen concentrations <1 mgO₂·L⁻¹, the nitrite oxidation and the anammox reaction occur simultaneously, allowing increased overall performance and simplified process control compared to separate aerobic and anaerobic phases (segregated either temporally or in different reactors). Sedimentation of the sludge requires special attention only during startup. Although the observed N₂O emissions were slightly higher than in conventional nitrogen removal, the overall greenhouse gas emissions were lower, mainly due to energy-saving.