Hoekstra Maaike, Geilvoet Stefan P, Hendrickx Tim L G, van Erp Taalman Kip Charlotte S, Kleerebezem Robbert, van Loosdrecht Mark C M
a Department of Biotechnology, Faculty of Applied Sciences , Delft University of Technology , Delft , Netherlands.
b Waterschap Hollandse Delta , Ridderkerk , Netherlands.
Environ Technol. 2019 May;40(13):1721-1733. doi: 10.1080/09593330.2018.1470204. Epub 2018 May 10.
The aim of this research was to study the biological feasibility of the Partial Nitritation/Anammox (PN/A) technology to remove nitrogen from municipal mainstream wastewaters. During stable process operations at summer temperatures (23.2 ± 1.3°C), the total nitrogen removal rate was 0.223 ± 0.029 kg N (md) while at winter temperatures (13.4 ± 1.1°C) the total nitrogen removal rate was 0.097 ± 0.016 kg N (m d). Nitrite-oxidizing bacteria (NOB) suppression was successfully achieved at the complete temperature range of municipal mainstream wastewater. Despite the presence of NOB as observed in activity tests, their activity could be successfully suppressed due to a relative low dissolved oxygen concentration. An overcapacity of ammonia-oxidizing bacteria and anammox activity was always present. Long-term stability is a focus point for future research, especially in relation to the stability of the biological oxygen demand removing step, preceding the PN/A reactor.
本研究的目的是探讨亚硝化/厌氧氨氧化（PN/A）技术去除城市污水中氮的生物可行性。在夏季温度（23.2±1.3°C）稳定运行期间，总氮去除率为0.223±0.029 kg N/（m·d），而在冬季温度（13.4±1.1°C）下，总氮去除率为0.097±0.016 kg N/（m·d）。在城市污水的整个温度范围内，亚硝酸盐氧化菌（NOB）的抑制均成功实现。尽管在活性测试中观察到了NOB的存在，但由于溶解氧浓度相对较低，其活性能够被成功抑制。氨氧化菌和厌氧氨氧化活性始终存在过剩能力。长期稳定性是未来研究的重点，特别是与PN/A反应器之前的生物需氧量去除步骤的稳定性相关。
