National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
Bioresour Technol. 2022 Feb;345:126539. doi: 10.1016/j.biortech.2021.126539. Epub 2021 Dec 11.
A continuous plug-flow reactor with anaerobic/front-aerobic/anoxic/post-aerobic zones, where partial nitrification occurred in the front-aerobic zone, followed by simultaneous anammox and endogenous denitrification in the anoxic zone (PN-SAED), was built up to treat municipal wastewater. Alternating anoxic/aerobic conditions and longer anoxic duration facilitated stable partial nitrification. The nitrite accumulation ratio (NAR) was maintained at 97.4 ± 1.2%, with temperatures between 13.3℃ to 19.8℃. Candidatus Brocadia were naturally enriched in-situ from the anoxic zone with relative abundances of 31.93% and 6.67% on the agitator blade and carriers, respectively. High removal efficiencies of total inorganic nitrogen (TIN) (95.1 ± 1.9%) and effluent TIN (2.6 ± 1.1 mg N/L) were acquired from low COD/TIN (3.4 ± 0.4) municipal wastewater with anammox contribution of 13.5%±5.8% to TIN removal. The PN-SAED process is a promising mainstream nitrogen removal method.
建立了一个具有厌氧/前置好氧/缺氧/后置好氧区的连续推流式反应器，其中前置好氧区发生部分硝化，随后在缺氧区同时进行厌氧氨氧化和内源性反硝化（PN-SAED），用于处理城市污水。交替的缺氧/好氧条件和更长的缺氧时间有利于稳定的部分硝化。亚硝酸盐积累比（NAR）保持在 97.4±1.2%，温度在 13.3℃至 19.8℃之间。缺氧区中的Candidatus Brocadia 自然原位富集，在搅拌器叶片和载体上的相对丰度分别为 31.93%和 6.67%。从 COD/TIN（3.4±0.4）较低的城市污水（含 13.5%±5.8%的厌氧氨氧化贡献）中获得了总无机氮（TIN）的高去除效率（95.1±1.9%）和出水 TIN（2.6±1.1mgN/L）。PN-SAED 工艺是一种很有前途的主流脱氮方法。
