Beijing International Scientific and Technological Cooperation Base of Water Pollution Control Techniques for Antibiotics and Resistance Genes, Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing 100044, PR China.
Beijing Capital Eco-Environment Protection Group Co., Ltd., Beijing 100044, PR China.
Bioresour Technol. 2022 Oct;361:127726. doi: 10.1016/j.biortech.2022.127726. Epub 2022 Aug 1.
Total nitrogen (TN) removal from municipal wastewater after organic recovery is challenging because of the low ratio of chemical oxygen demand (COD) to TN. Anaerobic ammonium oxidation (Anammox) is promising because it has no organic requirement, but its performance in treating effluents following COD captured remains unclear. This study used mainstream partial Anammox to remove nitrogen from effluent following magnetic separation within a continuous-flow anoxic-oxic reactor. Compared with traditional nitrification and denitrification, partial Anammox increased TN removal efficiency by 15.0% and contributed 23.6% of TN removal. Quantitative polymerase chain reaction revealed that the copy number of the Anammox gene (hzsB) increased substantially, while those of the nitrite oxidation (nxrA) and denitrification (narG and nirS) genes decreased. High-throughput sequencing identified Candidatus Brocadia as the dominant genus of anaerobic ammonium-oxidizing bacteria. These findings demonstrate the effectiveness of mainstream partial Anammox for treating COD-captured effluents and its potential in municipal wastewater treatment.
从经有机回收的城市废水中去除总氮（TN）具有挑战性，因为化学需氧量（COD）与 TN 的比例较低。厌氧氨氧化（Anammox）很有前景，因为它不需要有机物质，但它在处理 COD 捕获后的废水方面的性能尚不清楚。本研究在连续流缺氧-好氧反应器内使用主流部分 Anammox 从磁分离后的废水中去除氮。与传统的硝化和反硝化相比，部分 Anammox 将 TN 去除效率提高了 15.0%，并贡献了 23.6%的 TN 去除。定量聚合酶链反应显示 Anammox 基因（hzsB）的拷贝数显著增加，而亚硝酸盐氧化（nxrA）和反硝化（narG 和 nirS）基因的拷贝数则减少。高通量测序鉴定出 Candidatus Brocadia 为厌氧氨氧化菌的优势属。这些发现表明主流部分 Anammox 处理 COD 捕获废水的有效性及其在城市污水处理中的潜力。
