Han Yue-Mei, Liu Feng-Xia, Xu Xiao-Fei, Yan Zhuo, Liu Zhi-Jun
R&D Institute of Fluid and Powder Engineering, Dalian University of Technology, Dalian 116024 China E-mail:
Water Sci Technol. 2018 Mar;77(5-6):1483-1492. doi: 10.2166/wst.2017.572.
This study developed a partial nitrification (PN) and anaerobic ammonia oxidation (Anammox) process for treating high-ammonia wastewater using an innovative biofilm system in which ammonia oxidizing bacteria grew on fluidized Kaldnes (K1) carriers and Anammox bacteria grew on fixed acryl resin carriers. The airlift loop biofilm reactor (ALBR) was stably operated for more than 4 months under the following conditions: 35 ± 2 °C, pH 7.5-8.0 and dissolved oxygen (DO) of 0.5-3.5 mg/L. The results showed that the total nitrogen removal efficiency reached a maximum of 75% and the total nitrogen removal loading rate was above 0.4 kg/(d·m). DO was the most efficient control parameter in the mixed biofilm system, and values below 1.5 mg/L were observed in the riser zone for the PN reaction, while values below 0.8 mg/L were observed in the downer zone for the Anammox reaction. Scanning electron microscopy and Fluorescence In Situ Hybridization images showed that most of the nitrifying bacteria were distributed on the K1 carriers and most of the Anammox bacteria were distributed within the acryl resin carriers. Therefore, the results indicate that the proposed combined biofilm system is easy to operate and efficient for the treatment of high-ammonia wastewater.
本研究开发了一种部分硝化（PN）和厌氧氨氧化（Anammox）工艺，用于处理高氨废水，采用了一种创新的生物膜系统，其中氨氧化细菌生长在流化的Kaldnes（K1）载体上，厌氧氨氧化细菌生长在固定的丙烯酸树脂载体上。气升式循环生物膜反应器（ALBR）在35±2°C、pH值7.5 - 8.0和溶解氧（DO）为0.5 - 3.5 mg/L的条件下稳定运行了4个多月。结果表明，总氮去除效率最高达到75%，总氮去除负荷率高于0.4 kg/(d·m)。溶解氧是混合生物膜系统中最有效的控制参数，在PN反应的上升区观察到溶解氧值低于1.5 mg/L，而在Anammox反应的下降区观察到溶解氧值低于0.8 mg/L。扫描电子显微镜和荧光原位杂交图像显示，大多数硝化细菌分布在K1载体上，大多数厌氧氨氧化细菌分布在丙烯酸树脂载体内。因此，结果表明所提出的组合生物膜系统易于操作且对高氨废水处理高效。
