Zhou Yue, Wang Chao, Xu Xiaochen, Liu Lifen, Zhang Guoquan, Yang Fenglin
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environment Science and Technology, Dalian University of Technology, Ling Gong Road 2, Dalian 116024, PR China.
School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510006, PR China.
Bioresour Technol. 2024 Feb;393:130117. doi: 10.1016/j.biortech.2023.130117. Epub 2023 Nov 26.
A novel two-stage continuous-flow partial nitrification and denitrification coupled with simultaneous partial nitrification, anammox, and denitrification (PND-SNAD) process was developed to treat anaerobic sludge digestion liquor. During the stable phase, the total nitrogen and chemical oxygen demand (COD) removal efficiencies were 93 ± 3 % and 59 ± 7 %, respectively. Free ammonia suppression (26.2 ± 12.7 mg/L) and low dissolved oxygen (DO, 0.12 ± 0.07 mg/L) were key factors in the operation of the PND process, while the SNAD process was restricted successfully by limited oxygen (DO < 0.1 mg/L) and short solids retention time (9.7 d). The PND process was an important pretreatment process that could remove biodegradable dissolved COD by denitrification and supply ammonium-oxidizing bacteria (AOB) to the SNAD process. Nitrosomonas and Ca. Brocadia were the dominant AOB and anammox bacteria, respectively. Overall, this research presents a distinctive SNAD combined process for anaerobic sludge digestion liquor treatment.
开发了一种新型的两级连续流部分硝化和反硝化工艺，该工艺结合了同步部分硝化、厌氧氨氧化和反硝化（PND-SNAD），用于处理厌氧污泥消化液。在稳定阶段，总氮和化学需氧量（COD）的去除效率分别为93±3%和59±7%。游离氨抑制（26.2±12.7mg/L）和低溶解氧（DO，0.12±0.07mg/L）是PND工艺运行的关键因素，而SNAD工艺则通过有限的氧气（DO<0.1mg/L）和较短的固体停留时间（9.7d）成功受到限制。PND工艺是一个重要的预处理工艺，可通过反硝化去除可生物降解的溶解性COD，并为SNAD工艺提供氨氧化细菌（AOB）。亚硝化单胞菌属和嘉氏铁杆菌属分别是主要的AOB和厌氧氨氧化细菌。总体而言，本研究提出了一种独特的用于厌氧污泥消化液处理的SNAD联合工艺。
