Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Ecological and Environmental Science, Hainan University, Haikou 570228, China.
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou 570228, China.
Bioresour Technol. 2022 Aug;358:127378. doi: 10.1016/j.biortech.2022.127378. Epub 2022 May 26.
To achieve simultaneous biological nitrogen and phosphorus removal from municipal wastewater, the endogenous partial denitrification/anammox (EPDA) was combined with denitrifying dephosphatation in a complete biofilm reactor. Advanced nitrogen and phosphorus removal were achieved with effluent total nitrogen (TN) and PO-P concentrations of 7.77 ± 0.33 mg/L and 0.35 ± 0.10 mg/L, respectively. Anammox took a major role in the system, accounting for 76 ± 7% of nitrogen removal. 16S rRNA high-throughput sequencing results showed that the anammox bacteria co-existed with the denitrifying glycogen accumulating organisms (DGAOs) and the denitrifying phosphorus accumulating organisms (DPAOs). Anammox bacteria were mainly distributed in the inner layer, while DGAOs and DPAOs existed in the outer layer of EPDA biofilms. Furthermore, based on the EPDA biofilm system, a promising advanced nitrogen and phosphorus removal process was suggested to achieve lower requirements for energy and reagent consumption.
为了从城市废水中同时去除生物氮和磷，将内源性部分反硝化/厌氧氨氧化（EPDA）与完全生物膜反应器中的反硝化除磷相结合。先进的氮和磷去除，出水总氮（TN）和 PO-P 浓度分别为 7.77±0.33mg/L 和 0.35±0.10mg/L。厌氧氨氧化在系统中起着主要作用，占氮去除的 76±7%。16S rRNA 高通量测序结果表明，厌氧氨氧化菌与反硝化聚磷菌（DPAOs）和反硝化聚糖积累菌（DGAOs）共存。厌氧氨氧化菌主要分布在内层，而 DGAOs 和 DPAOs 存在于 EPDA 生物膜的外层。此外，基于 EPDA 生物膜系统，提出了一种有前途的先进氮磷去除工艺，以实现更低的能源和试剂消耗要求。
