A novel A-B process for enhanced biological nutrient removal in municipal wastewater reclamation.
A novel A-B process for enhanced biological nutrient removal in municipal wastewater reclamation.
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DOI：
10.1016/j.chemosphere.2017.09.049
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发表时间：
2017-12
期刊：
影响因子：
8.8
通讯作者：
Guangjing Xu;Han Wang;Jun Gu;Nan Shen;Z. Qiu;Yan Zhou;Yu Liu
中科院分区：
文献类型：
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作者：
Guangjing Xu;Han Wang;Jun Gu;Nan Shen;Z. Qiu;Yan Zhou;Yu Liu
本研究开发了一种创新的 A-B 工艺，用于增强城市废水回收中营养物的去除，其中微曝气移动床生物膜反应器作为 A 阶段，步进进料序批式反应器 (SBR) 作为 B 阶段。 A阶段去除了55%的COD和15%的氨氮，通过亚硝化和反亚硝化去除了88%以上的总氮，B阶段去除了93%的磷，其中氨氧化菌活性明显高于亚硝酸氧化菌活性。同时，在 B 阶段 SBR 中也观察到大量聚磷酸盐积累生物（PAO）的表型。荧光原位杂交显示，Accumulibacter 是 PAO 的优势菌，而 Competibacter 检测不到。与传统的活性污泥工艺相比，所提出的 A-B 工艺可以提供一种更具成本效益的替代方案，以更少的能耗增强城市废水中生物营养物的去除。
This study developed an innovative A-B process for enhanced nutrients removal in municipal wastewater reclamation, in which a micro-aerated moving bed biofilm reactor served as A-stage and a step-feed sequencing batch reactor (SBR) as B-stage. In the A-stage, 55% of COD and 15% of ammonia nitrogen was removed, while more than 88% of the total nitrogen was removed via nitritation and denitritation, together with 93% of phosphorous removal at the B-stage where ammonia oxidizing bacteria activity was significantly higher than nitrite oxidizing bacteria activity. Meanwhile substantial phenotype of polyphosphate accumulating organisms (PAOs) was also observed in the B-stage SBR. Fluorescencein situhybridization revealed thatAccumulibacterwas the dominant PAOs with undetectableCompetibacter. Compared to the conventional activated sludge process, the proposed A-B process could offer a more cost-effective alternative for enhanced biological nutrients removal from municipal wastewater with less energy consumption.