Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 76, 100-44 Stockholm, Sweden.
Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 76, 100-44 Stockholm, Sweden; IVL Swedish Environmental Institute, Valhallavägen 81, 114 28 Stockholm, Sweden.
Bioresour Technol. 2015 Dec;198:478-87. doi: 10.1016/j.biortech.2015.08.123. Epub 2015 Sep 12.
In this study the system based on the combination of biofilm and activated sludge (IFAS - integrated fixed film activated sludge) was tested and compared with a system that relies only on biofilm (MBBR - moving bed biofilm reactor) for nitrogen removal from municipal wastewater by deammonification process. By introduction of suspended biomass into MBBR the nitrogen removal efficiency increased from 36 ± 3% to 70 ± 4% with simultaneous 3-fold increase of nitrogen removal rate. Results of batch tests and continuous reactor operation showed that organotrophic nitrate reduction to nitrite, followed by anammox reaction contributed to this high removal efficiency. After sCOD/NH4-N ratio decreased from 1.8 ± 0.2 to 1.3 ± 0.1 removal efficiency decreased to 52 ± 4%, while still maintaining 150% higher removal rate, comparing to MBBR. Activity tests revealed that affinity of NOB to oxygen is higher than affinity of AOB with half-saturation constants of 0.05 and 0.41 mg/L, respectively.
在这项研究中，基于生物膜和活性污泥（IFAS - 集成固定膜活性污泥）组合的系统进行了测试，并与仅依靠生物膜（MBBR - 移动床生物膜反应器）的系统进行了比较，以通过脱氨过程从城市废水中去除氮。通过将悬浮生物质引入 MBBR，氮去除效率从 36 ± 3%提高到 70 ± 4%，同时氮去除速率提高了 3 倍。批量测试和连续反应器运行的结果表明，有机硝酸盐还原为亚硝酸盐，随后进行厌氧氨氧化反应，促成了这种高去除效率。当 sCOD/NH4-N 比从 1.8 ± 0.2 降低到 1.3 ± 0.1 时，去除效率降低到 52 ± 4%，但与 MBBR 相比，仍保持 150%更高的去除率。活性测试表明，NOB 对氧气的亲和力高于 AOB，半饱和常数分别为 0.05 和 0.41 mg/L。
