Pelaz L, Gómez A, Letona A, Garralón G, Fdz-Polanco M
Department of Chemical Engineering and Environmental Technology, Escuela de Ingenierías Industriales. Sede Dr. Mergelina, University of Valladolid, C/ Dr. Mergelina, s/n. P.C. 47011 Valladolid, Spain E-mail:
CADAGUA S. A., Gran Vía 45-7, P. C. 48011 Bilbao, Spain.
Water Sci Technol. 2018 Mar;77(5-6):1581-1590. doi: 10.2166/wst.2018.034.
This work presents the performance of a sequencing batch reactor (SBR) system used as a means of removing nitrogen from domestic wastewater containing a low chemical oxygen demand (COD) to nitrogen ratio due to pre-treatment with an anaerobic reactor. The aim of the work was to determine the feasibility of this system for the removal of nitrogen from the domestic wastewater. An SBR with a working volume of 5 L was investigated at different cycle times of 12, 8 and 6 h, at 18 °C. The efficiency of the SBR varied together with the duration of the cycle, where the optimum performance was seen in the 6 h cycle with the anoxic-aerobic-anoxic sequence. Due to the low quantity of organic matter present in the domestic wastewater after the anaerobic treatment, an additional supply of external carbon was necessary before the second anoxic stage. The removal efficiencies obtained were: 98% for total Kjeldahl nitrogen, 84% for total nitrogen and 77% for soluble COD. The reactor was thus shown to be viable, and it was concluded that this process may be successfully applied as a post-treatment for the removal of nitrogen from anaerobically treated domestic wastewater.
这项工作展示了序批式反应器（SBR）系统的性能，该系统被用作从经厌氧反应器预处理后化学需氧量（COD）与氮比例较低的生活污水中去除氮的一种手段。这项工作的目的是确定该系统从生活污水中去除氮的可行性。在18°C下，对一个工作体积为5升的SBR在12小时、8小时和6小时的不同循环时间下进行了研究。SBR的效率随循环持续时间而变化，其中在6小时循环且采用缺氧-好氧-缺氧顺序时观察到最佳性能。由于厌氧处理后生活污水中存在的有机物量较低，在第二个缺氧阶段之前需要额外供应外部碳源。获得的去除效率为：总凯氏氮98%、总氮84%和可溶性COD 77%。因此，该反应器被证明是可行的，并且得出结论，该工艺可成功用作厌氧处理后的生活污水中氮去除的后处理工艺。
