Department of Civil Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada.
Department of Civil Engineering, University of Manitoba, Winnipeg, MB R3T 5V6, Canada.
Bioresour Technol. 2019 Oct;289:121742. doi: 10.1016/j.biortech.2019.121742. Epub 2019 Jul 2.
A novel partial nitritation-anammox (PNA) reactor configuration was piloted for 250 days. Primary effluent from full-scale municipal wastewater treatment plant was treated in a two-stage biofilm system incorporating innovative process control for cold partial nitritation. Partial nitritation was combined with carbon removal in a moving bed biofilm reactor (MBBR) to achieve high-rate treatment and nitritation was obtained with dissolved oxygen to total ammonium nitrogen (DO/TAN) ratio control and free ammonia (FA) for inhibition of nitratation. Effluent from MBBR was directed to an integrated fixed-film activated sludge (IFAS) reactor where nitrogen was removed via anammox. MBBR achieved partial nitritation at 2.0 ± 0.3 g-N m d and nitrogen removal in the IFAS reactor reached 0.45 ± 0.1 g-N m d (55 g-N m d). The process performed well at 19 ± 3 °C with an average effluent total inorganic nitrogen (TIN) concentration of 11 ± 4 mg L.
一种新型部分亚硝化-厌氧氨氧化（PNA）反应器构型经过 250 天的中试。采用创新的低温部分亚硝化过程控制，在两级生物膜系统中处理来自大型城市污水处理厂的原水。在移动床生物膜反应器（MBBR）中，将部分亚硝化与碳去除相结合，以实现高处理速率，并通过溶解氧与总铵氮（DO/TAN）比控制和游离氨（FA）抑制硝化作用来实现亚硝化。MBBR 的出水进入集成固定膜活性污泥（IFAS）反应器，通过厌氧氨氧化去除氮。MBBR 实现了 2.0±0.3g-N·m-d 的部分亚硝化，IFAS 反应器中的氮去除率达到 0.45±0.1g-N·m-d（55g-N·m-d）。该工艺在 19±3℃下运行良好，平均出水总无机氮（TIN）浓度为 11±4mg·L。
