DO和填料对多级A/O工艺同步硝化反硝化的影响  

Effect of DO and Fillers on Simultaneous Nitrification and Denitrification in Multistage A/O Process

作　　者：张智[1,2] 刘亚琴[1,2] 傅斌[1,2] 章叶川[3] 陈杰云 

机构地区：[1]重庆大学城市建设与环境工程学院,重庆400045 [2]三峡库区生态环境教育部重点实验室,重庆400045 [3]西北工业大学动力与能源学院,陕西西安710072 [4]重庆市建龙环保工程有限公司,重庆401120

出　　处：《中国给水排水》2013年第17期11-15,共5页China Water & Wastewater

摘　　要：为了解决低碳源污水脱氮效果不佳的问题,挖掘多级A/O工艺强化脱氮的潜力,在小试装置中开展了多级A/O工艺同步硝化反硝化的研究。结果表明,随着DO浓度的升高,同步硝化反硝化率呈现下降的趋势,低DO浓度(0.5 mg/L)下的同步硝化反硝化率高达37.4%。在系统中投加填料之后,系统的同步硝化反硝化脱氮能力得到提升。但是随着DO浓度的升高,填料对同步硝化反硝化的影响逐渐减弱。通过试验,提出了多级A/O工艺在较低溶解氧浓度下的梯级曝气运行控制模式,并确定了最佳运行工况,即各好氧区的最佳DO分别为0.5、1.0、1.5 mg/L,在低曝气能耗下实现了对氨氮的去除与较大程度的同步硝化反硝化。To improve the efficiency of nitrogen removal from the low carbon sewage, and excavate the potential of multistage A/O process for enhancing nitrogen removal, a small-scale experimental study on simultaneous nitrification and denitrification in multistage A/O process was carried out. The results showed that the simultaneous nitrification and denitrification rates exhibited a downward trend along with the rise in dissolved oxygen concentration. The rate was 37.4% at a low dissolved oxygen of 0.5 mg/L. The rate of simultaneous nitrification and denitrification was improved after adding fillers into the system. However, with the rise in dissolved oxygen concentration, the effect of fillers on simultaneous nitrification and denitrification was gradually weakened. Based on tests, the low oxygen cascade aeration operation control mode in the multistage A/O process was proposed, and the optimal operation conditions were de- termined. The optimal dissolved oxygen concentrations were 0.5 rag/L, 1.0 mg/L and 1.5 mg/L respec- tively. Ammonia nitrogen removal and a greater degree of simultaneous nitrification and denitrification were achieved with low energy consumption in the aeration zones.

关 键 词：同步硝化反硝化 DO 填料 多级A O工艺 

分 类 号：X703[环境科学与工程—环境工程]