Department of Chemical Engineering, University of Santiago of Chile, Santiago, Chile.
Environ Technol. 2012 Feb-Mar;33(4-6):607-22. doi: 10.1080/09593330.2011.586729.
Literature has paid scarce attention to the modelling of the integrated anoxic-anaerobic-aerobic process in upflow fixed-bed biofilm reactors used to treat wastewater. The present study developed a model for industrial salmon fishery wastewater treatment in an integrated anoxic-anaerobic-aerobic upflow fixed-bed biofilm reactor. The model successfully predicted the removal efficiency of both Chemical Oxygen Demand (COD) and nitrogen for two recycle ratios at steady state. The simulation study shows that the COD removal efficiency is not affected by any parameter under the studied conditions, while the nitrogen removal efficiency is affected by the hydraulic retention time (HRT) and the inlet COD concentration, where Total Ammonia Nitrogen (TAN) is the most sensitive variable of the anoxic-anaerobic-aerobic system. The conditions that best obtained removal efficiencies above 70% are: recycle rate between 1 and 2; HRT between 1.4 and 2.2 days and inlet COD concentrations lower than 2500 mg COD L(-1). Analysis of the model's sensitivity indicated that the parameters that exert most influence on the model for the system were micro(max,M), k(h), micro(max,H), eta(NO3-), micro(NOB), K(DO)NOB and D(DO).
文献对用于处理废水的上流式固定床生物膜反应器中缺氧-厌氧-好氧一体化工艺的建模关注甚少。本研究针对鲑鱼养殖废水处理，在上流式固定床生物膜缺氧-厌氧-好氧一体化反应器中建立了一个模型。该模型成功预测了在稳态下两种循环比下的化学需氧量（COD）和氮的去除效率。模拟研究表明，在研究条件下，COD 去除效率不受任何参数的影响，而氮去除效率受水力停留时间（HRT）和进水 COD 浓度的影响，其中总氨氮（TAN）是缺氧-厌氧-好氧系统中最敏感的变量。获得 70%以上去除效率的最佳条件为：循环比在 1 到 2 之间；HRT 在 1.4 到 2.2 天之间，进水 COD 浓度低于 2500mg COD/L。模型敏感性分析表明，对该系统模型影响最大的参数是 micro(max,M)、k(h)、micro(max,H)、eta(NO3-)、micro(NOB)、K(DO)NOB 和 D(DO)。
