Department of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China.
Department of Environment and Spatial Informatics, China University of Mining and Technology, Xuzhou, China; CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China.
Chemosphere. 2020 Mar;243:125300. doi: 10.1016/j.chemosphere.2019.125300. Epub 2019 Nov 5.
The removal of nutrients in a combined modified University of Cape Town and post-anoxic/aerobic-membrane bioreactor (UCT-A/MBR) was investigated. Denitrifying phosphorus removal (DPR) and nitrate-dependent anaerobic ferrous oxidation (NAFO) were applied to enhance the nutrient removal performances. The results showed that NAFO with the addition of Fe(II) and DPR could promote nitrogen and phosphorus removal. The total nitrogen removal efficiency gradually increased from 71.05 ± 2.00% to 73.84 ± 1.74% and 75.70 ± 1.47% with no Fe(II) addition, addition to the post-anoxic tank, and addition to the anoxic tank, and the total phosphorus removal efficiency increased from 89.37 ± 1.91% to 95.21 ± 0.85% and 96.01 ± 1.10%, respectively. Gene sequencing was conducted, and Saprospiraceae was determined to be the dominant DPR-related bacteria, with its abundance increasing from 16.31% to 22.45% after Fe(II) addition. Additionally, the proportion of the NAFO-related bacteria Azospira increased from 0.58% to 1.91% after Fe(II) addition. The microbial succession caused by the addition of Fe(II) may have resulted in the enhanced removal performance.
研究了联合改良开普敦大学和缺氧/好氧膜生物反应器（UCT-A/MBR）中营养物质的去除情况。应用反硝化除磷（DPR）和硝酸盐依赖型厌氧亚铁氧化（NAFO）来增强营养物质去除性能。结果表明，添加 Fe(II) 的 NAFO 和 DPR 可以促进氮磷去除。总氮去除效率分别从无 Fe(II)添加、添加到缺氧池和添加到厌氧池时的 71.05±2.00%逐渐提高到 73.84±1.74%和 75.70±1.47%，总磷去除效率分别从 89.37±1.91%提高到 95.21±0.85%和 96.01±1.10%。进行了基因测序，确定 Saprospiraceae 是与 DPR 相关的优势细菌，添加 Fe(II) 后其丰度从 16.31%增加到 22.45%。此外，添加 Fe(II) 后，与 NAFO 相关的细菌 Azospira 的比例从 0.58%增加到 1.91%。添加 Fe(II) 引起的微生物演替可能导致了去除性能的增强。
