Graduate School of Science and Technology, Kumamoto University, 2-39-1 Kurokami, Kumamoto 860-8555, Japan.
Bioresour Technol. 2011 Feb;102(4):3761-7. doi: 10.1016/j.biortech.2010.12.008. Epub 2010 Dec 7.
In this study, a lab-scale swim-bed partial nitrification reactor was developed to treat ammonium-rich reject water to achieve an appropriate NO(2)(-)-N/NH(4)(+)-N mixture that could serve as a pretreatment for anaerobic ammonium oxidation (anammox). Strictly controlling the DO concentration was adopted as the main operational strategy. In addition, the influent concentrations of inorganic carbon/ammonium (IC/NH(4)(+)) and alkalinity/ammonium (Alk/NH(4)(+)) that were approximately 0.8 and 4.8, respectively, were regarded as the suitable ratios for the steady and high-rate operation of the reactor in this study. When reject water that was not diluted was introduced to this system, the maximum nitrogen loading rate was 5.9 kg-N/m(3)/day, the ammonium conversion rate was 3.1 kg-N/m(3)/day, and the effluent NO(2)-N/(NO(2)-N+NO(3)-N) percentage ratio was over 99.9%. Furthermore, DNA analysis confirmed the existence of AOB, which was responsible for the stable performance that was achieved in the PN reactor.
在这项研究中，开发了一种实验室规模的游泳床部分硝化反应器，以处理富含铵的废水，以获得适当的 NO(2)(-)-N/NH(4)(+)-N 混合物，作为厌氧氨氧化 (anammox) 的预处理。采用严格控制 DO 浓度作为主要操作策略。此外，进水无机碳/铵 (IC/NH(4)(+)) 和碱度/铵 (Alk/NH(4)(+)) 浓度分别约为 0.8 和 4.8，被认为是本研究中反应器稳定和高速运行的合适比例。当将未稀释的废水引入该系统时，最大氮负荷率为 5.9 kg-N/m(3)/天，铵转化率为 3.1 kg-N/m(3)/天，出水 NO(2)-N/(NO(2)-N+NO(3)-N) 百分比大于 99.9%。此外，DNA 分析证实了 AOB 的存在，这是 PN 反应器实现稳定性能的原因。
