Ni Bing-Jie, Chen You-Peng, Liu Shao-Yang, Fang Fang, Xie Wen-Ming, Yu Han-Qing
Department of Chemistry, University of Science & Technology of China, Hefei, China.
Biotechnol Bioeng. 2009 Jun 15;103(3):490-9. doi: 10.1002/bit.22279.
A mathematical model was developed to describe the anaerobic ammonium oxidation (ANAMMOX) process in a granular upflow anaerobic sludge blanket (UASB) reactor. ANAMMOX granules were cultivated in the UASB reactor by seeding aerobic granules. The granule-based reactor had a great N-loading resistant capacity. The model simulation results on the 1-year reactor performance matched the experimental data well. The yield coefficient for the growth and the decay rate coefficient of the ANAMMOX granules were estimated to be 0.164 g COD g(-1) N and 0.00016 h(-1), respectively. With this model, the effects of process parameters on the reactor performance were evaluated. Results showed that the optimum granule diameter for the maximum N-removal should be between 1.0 and 1.3 mm and that the optimum N loading rate should be 0.8 kg N m(-3) d(-1). In addition, the substrate micro-profiles in the ANAMMOX granules were measured with a microelectrode to explore the diffusion dynamics within the granules, and the measured profiles matched the predicted results well.
建立了一个数学模型来描述颗粒状上流式厌氧污泥床（UASB）反应器中的厌氧氨氧化（ANAMMOX）过程。通过接种好氧颗粒在UASB反应器中培养ANAMMOX颗粒。基于颗粒的反应器具有很强的耐氮负荷能力。对该反应器一年性能的模型模拟结果与实验数据吻合良好。ANAMMOX颗粒生长的产率系数和衰减速率系数估计分别为0.164 g COD g(-1) N和0.00016 h(-1)。利用该模型，评估了工艺参数对反应器性能的影响。结果表明，实现最大氮去除的最佳颗粒直径应在1.0至1.3毫米之间，最佳氮负荷率应为0.8 kg N m(-3) d(-1)。此外，用微电极测量了ANAMMOX颗粒中的底物微剖面，以探索颗粒内的扩散动力学，测量的剖面与预测结果吻合良好。
