复合A/O工艺在城市污水处理厂除磷脱氮中的应用研究

摘要

To explore the feasibility of the application of a hybrid A/O process in municipal wastewater treatment plant,the removal efficiency of organic matter,total nitrogen(TN)and total phosphorus(TP)in municipal wastewater by a hybrid A/O process was investigated.More than 9 months of productive experiments were carried out.The results showed that the influent COD,TN,NH4+-N,TP,SS concentration were 16.0～428.0,2.0～40.6,0.3～35.8,0.4～5.0,107.0～157.0 mg/L.The effluent parameter were 0.4～58.5,0.4～20,0.1～30.7,0.1～1.0,3.0～18.0 mg/L.The averaged removal rate of COD,TN,NH4+-N,TP and SS were 64.6％,40.7％,79.3％,57.5％and 91.8％.The hybrid A/O process has a good efficiency of the removal of phosphorus and nitrogen,the effluent was clear,the effluent water qualities were more lower than pollutant discharge standard of urban sewage treatment plants(GB 18918-2002),which indicates that the hybrid A/O process is suitable for application in wastewater treatment plants.%为了探讨复合A/O工艺在城市污水处理厂应用的可行性,考察了复合A/O工艺对城市污水中有机物、TN和TP等去除效果,并进行了9个多月的生产性试验研究.结果表明:进水COD,TN,NH4+-N,TP,SS质量浓度范围分别为 16.0～428.0,2.0～40.6,0.3～35.8,0.4～5.0,107.0～157.0 mg/L,出水指标分别为 0.4～58.5,0.4～20.0,0.1～30.7,0.1～1.0,3.0～18.0 mg/L.COD,TN,NH4+-N,TP,SS平均去除率为64.6％,40.7％,79.3％,57.5％和91.8％.复合A/O工艺具有良好的除磷脱氮效果,出水清澈,出水水质稳定低于GB 18918-2002《城镇污水处理厂污染物排放标准》,说明复合A/O工艺适合在污水处理厂中应用.