School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin 300384, China; Tianjin Key Laboratory of Aqueous Science and Technology, Tianjin 300384, China; Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-857, Japan.
School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; Joint Research Centre for Protective Infrastructure Technology and Environmental Green Bioprocess, School of Environmental and Municipal Engineering, Tianjin 300384, China; Tianjin Key Laboratory of Aqueous Science and Technology, Tianjin 300384, China.
Bioresour Technol. 2021 Feb;321:124432. doi: 10.1016/j.biortech.2020.124432. Epub 2020 Nov 20.
A novel internal circulation contact oxidation membrane bioreactor (ICCOMBR) was constructed to investigate a three steps startup strategy of single-stage partial nitritation-anammox (SPNA) system. A stable nitrite accumulation rate (NAR) of 86.60% was achieved with NH-N over 250 mg/L in nitritation process. The partial nitritation process could be effectively achieved by reducing the aeration rate (AR) by about 50% in the nitritation process, with an effluent NO-N/NH-N ratio of 1.15 ± 0.04. The SPNA system was started up in 27 days following the inoculated anammox granular sludge. A total nitrogen removal efficiencies of 82% was achieved at a NLR of 0.60 gN/L/d and dissolved oxygen (DO) concentration below 0.55 mg/L. Anammox function genus (Ca.Kuenenia and Ca. Anammoximicrobium) abundance accounted for 20.77% in the biofilm, which is approximately equal to 22.2% in the suspended sludge. Nitrosomon as the dominant AOB genera, was detected in the biofilm (6.5%) and suspended sludge (13.3%).
构建了一种新型内循环接触式氧化膜生物反应器（ICCOMBR），以研究单级部分亚硝化-厌氧氨氧化（SPNA）系统的三步启动策略。在硝化过程中，当 NH-N 超过 250mg/L 时，可实现稳定的亚硝积累率（NAR）为 86.60%。通过在硝化过程中降低约 50%的曝气率（AR），可以有效地实现部分硝化过程，出水 NO-N/NH-N 比为 1.15±0.04。接种厌氧氨氧化颗粒污泥后 27 天即可启动 SPNA 系统。在 NLR 为 0.60gN/L/d 和溶解氧（DO）浓度低于 0.55mg/L 的条件下，可实现总氮去除效率 82%。生物膜中厌氧氨氧化功能属（Ca.Kuenenia 和 Ca.Anammoximicrobium）丰度占 20.77%，与悬浮污泥中的 22.2%大致相当。生物膜（6.5%）和悬浮污泥（13.3%）中均检测到亚硝化单胞菌作为优势 AOB 属。
