【摘要】 采用活性污泥数学模型和阶跃响应分析方法从幅度(相对灵敏度)和动力学(响应时间)两方面开展了缺氧/厌氧/好氧(倒置AAO)工艺的特性分析,以筛选灵敏度高、响应速度快的操作变量,用以指导工艺运行优化。结果表明,进水流量(Q_f)、剩余污泥排放量(WAS)、污泥回流比(RAS)和混合液回流比(MLR)对出水水质的灵敏度较高。硝化作用对WAS和RAS变化最为敏感;溶解氧(DO)浓度则适合于出水氨氮浓度的快速调整; RAS、MLR和WAS对出水总氮和总磷浓度均有显著影响;而进水分配比对出水污染物浓度和功能性微生物含量影响不大。更多还原

【Abstract】 Characteristics of the anoxic/anaerobic/aerobic (reversed AAO) process were analyzed from two aspects including amplitude (relative sensitivity) and kinetics (response time) by using activated sludge mathematical model and step response method,so as to select the operating variables with high sensitivity and fast response to guide the process optimization. The results indicated that pollutants concentrations of the effluent were highly sensitive to influent flow rate (Qf),waste activated sludge (WAS), returned activated sludge (RAS) and mixed liquor recirculation (MLR). The nitrification process was most sensitive to WAS and RAS,while the DO was suitable for short-term adjustment of the effluent ammonia nitrogen. RAS,MLR and WAS were all had significant effects on total nitrogen and total phosphorus of the effluent. However,the step feeding ratio had an insignificant effect on the effluent pollutants concentrations and functional biomass in the reversed AAO process.更多还原