悬浮填料内循环脱氮除磷效能分析

Efficiency Analysis of Nitrogen and Phosphorus Removal by Internal Recycling Process with a Suspended Carrier

以校园生活污水为处理对象,在SBR(Sequencing Batch Reactor)反应池中投加悬浮填料进行脱氮除磷效能研究。填料填充率为30%,池底采用边缘对称曝气,填料在气力推动下进行对称逆循环流动,在时间顺序和在空间位置上循环经历好氧及微好氧过程,此工艺对COD的去除率可达95.2%,NH3-N(氨氮)去除率达95%以上,TP(总磷)去除率达75%。试验通过分析DO(溶解氧)及pH突变点规律,验证并指示该工艺中碳源降解及脱氮除磷过程进行得较为完全。

Nitrogen and phosphorus removal efficiencies were studied by infusing the campus sanitary sewage and suspended carrier into a Sequencing Batch Reactor （SBR） reactor using a carrier fill rate of 30 percent. The aeration pipes were laid symmetrically on the margin of the pond bottom. Driven by air currents, the carrier flowed anticircularly and symmetrically. In the pond, aerobic respiration and anaerobic respiration replaced one another period- ically, both spatially and temporally. The removal rate of COD, NH3-N and TP reached over 95.2%, 95% and 75%, respectively. Experimental DO and pH curve-point analyses validated this process and showed the degradation of organic carbon and nitrogen and phosphorus removal to be complete.