Insights into a novel nitrogen removal process based on simultaneous anammox and denitrification(SAD) following nitritation with in-situ NOB elimination  

作　　者：Jing Chen Jia Zeng Yiran He Shiquan Sun Haipeng Wu Yaoyu Zhou Zhenguo Chen Jianhui Wang Hong Chen 

机构地区：[1]School of Hydraulic and Environmental Engineering,Changsha University of Science&Technology,Changsha 410114,China [2]Engineering and Technical Center of Hunan Provincial Environmental Protection for River-Lake Dredging Pollution Control,Changsha 410114,China [3]College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China [4]School of Environment and Energy,South China University of Technology,Guangzhou 510006,China [5]School of Food science and Bioengineering,Changsha University of Science&Technology,Changsha 410114,China

出　　处：《Journal of Environmental Sciences》2023年第3期160-170,共11页环境科学学报（英文版）

基　　金：supported by the Open Research Fund of Engineering and Technical Center of Hunan Provincial Environmental Protection for River-Lake Dredging Pollution Control (No. EPD202002);Scientific Research Project of Education Department of Hunan Province (No. 20C0057);the Science and Technology Department of Hunan Province (Nos. 2021JJ10007, 2021NK2015)。

摘　　要：Simultaneous anammox and denitrification(SAD) is an efficient approach to treat wastewater having a low C/N ratio;however, few studies have investigated a combination of SAD and partial nitritation(PN). In this study, a lab-scale up-flow blanket filter(UBF) and zeolite sequence batch reactor(ZSBR) were continuously operated to implement SAD and PN advantages, respectively. The UBF achieved a high total nitrogen(TN) removal efficiency of over 70% during the start-up stage(days 1–50), and reached a TN removal efficiency of 96%in the following 90 days(days 51–140) at COD/NH_(4)^(+)-N ratio of 2.5. The absolute abundance of anammox bateria increased to the highest value of 1.58 × 107copies/μL DNA;Comamonadaceae was predominant in the UBF at the optimal ratio. Meanwhile, ZSBR was initiated on day 115 as fast nitritation process to satisfy the influent requirement for the UBF. The combined process was started on day 140 and then lasted for 30 days, during the combined process, between the two reactors, the UBF was the main contributor for TN(66.5% ± 4.5%)and COD(71.8% ± 4.9%) removal. These results demonstrated that strong SAD occurred in the UBF when following a ZSBR with in-situ NOB elimination. This research presents insights into a novel biological nitrogen removal process for low C/N ratio wastewater treatment.

关 键 词：Simultaneous anammox and DENITRIFICATION Up-flow blanket filter Zeolite sequence batch reactor Biological nitrogen removal Wastewater treatment 

分 类 号：X703[环境科学与工程—环境工程]