National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Bioresour Technol. 2023 Sep;384:129347. doi: 10.1016/j.biortech.2023.129347. Epub 2023 Jun 17.
For achieving efficient and robust treatment of domestic sewage with C/N around 2.8, this study innovatively developed an integrated fermentation, partial-nitrification, partial-denitrification and anammox (IFPNDA) process based on the Anaerobic Baffled Reactor and Continuous-flow Stirred Tank Reactor (ABR-CSTR) bioreactor. Desirable N-removal efficiency of 87.5 ± 2.1% was obtained without external organics, correspondingly effluent total nitrogen (TN) concentration reached 6.1 ± 0.7 mg/L. The N-removal stability was greatly facilitated by the effective linkage between partial nitrification (PN) process and partial denitrification (PD) process in emergency. Highly enriched hydrolytic bacteria (6.9%) and acidogenic bacteria (5.7%) in A1, especially Comamonas (2.8%) and Longilinea (3.5%), induced the significant increase of volatile fatty acids (VFAs) in domestic sewage. Thauera (6.1%) in A2 and Nitrosomonas (5.4%) in A3 acted as the dominant flora of nitrite supplies for anammox in IFPNDA process. Candidatus_Brocadia (2.4%) dominated the advanced nitrogen removal. The IFPNDA process exhibited much potential for achieving energy neutrality during wastewater treatment.
为实现 C/N 约为 2.8 的生活污水的高效、稳定处理，本研究创新性地基于厌氧折流板反应器（ABR）和连续流搅拌槽式反应器（CSTR）生物反应器，开发了一种集成发酵、部分硝化、部分反硝化和厌氧氨氧化（IFPNDA）工艺。在无需外加有机物的情况下，获得了 87.5±2.1%的理想脱氮效率，相应的出水总氮（TN）浓度达到 6.1±0.7mg/L。在紧急情况下，部分硝化（PN）工艺和部分反硝化（PD）工艺之间的有效联系极大地促进了脱氮的稳定性。A1 中高度富集的水解细菌（6.9%）和产酸细菌（5.7%），特别是 Comamonas（2.8%）和 Longilinea（3.5%），导致生活污水中挥发性脂肪酸（VFAs）的显著增加。A2 中的 Thauera（6.1%）和 A3 中的 Nitrosomonas（5.4%）作为 IFPNDA 工艺中厌氧氨氧化的亚硝酸盐供应的优势菌群。Candidatus_Brocadia（2.4%）主导了高级脱氮。IFPNDA 工艺在污水处理过程中表现出实现能量中性的巨大潜力。
