Departamento de Química Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul 7820436, Santiago, Chile.
Departamento de Química Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul 7820436, Santiago, Chile.
Bioresour Technol. 2024 Mar;395:130334. doi: 10.1016/j.biortech.2024.130334. Epub 2024 Jan 17.
Treating nitrogenous compounds in wastewater is a contemporary challenge, prompting novel approaches for ammonium (NH) conversion to molecular nitrogen (N). This study explores the classic anaerobic ammonium oxidation process (Anammox) coupled to the iron-dependent anaerobic ammonium oxidation process (Feammox) in a sequential discontinuous bioreactor (SBR) for NH removal. Feammox and Anammox cultures were individually enriched and combined, optimizing the coupling, and identifying key variables influencing the enrichment process. Adding sodium acetate as a carbon source significantly reduces Fe to Fe, indicating Feammox activity. Both Anammox and Feammox processes were successfully operated in SBRs, achieving efficient NH removal (Anammox: 64.6 %; Feammox: 43.4 %). Combining these pathways in a single SBR enhances the NH removal capacity of 50.8 %, improving Feammox efficiency. The Feammox process coupled with Anammox may generate the nitrite (NO) needed for Anammox. This research contributes to biotechnological advancements for sustainable nitrogenous compound treatment in SBRs.
处理废水中的含氮化合物是当前面临的一项挑战，促使人们寻求将氨（NH）转化为分子氮（N）的新方法。本研究在序批式间歇反应器（SBR）中探索了经典的厌氧氨氧化过程（Anammox）与铁依赖性厌氧氨氧化过程（Feammox）的耦合，以去除 NH。分别富集和组合了 Feammox 和 Anammox 培养物，优化了耦合，并确定了影响富集过程的关键变量。添加乙酸钠作为碳源可显著将 Fe 还原为 Fe，表明 Feammox 具有活性。Anammox 和 Feammox 工艺都成功地在 SBR 中运行，实现了高效的 NH 去除（Anammox：64.6%；Feammox：43.4%）。在单个 SBR 中结合这些途径可提高 50.8%的 NH 去除能力，提高 Feammox 的效率。Feammox 工艺与 Anammox 耦合可能会产生 Anammox 所需的亚硝酸盐（NO）。本研究为 SBR 中可持续的含氮化合物处理的生物技术进步做出了贡献。
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