摘要
通过使用GPS-X软件模拟传统A^2/O工艺、倒置A^2/O工艺和分点进水倒置A^2/O工艺的脱氮除磷效果,分析确定在建设投资、运行成本相同时处理效果最佳的工艺。根据模拟结果,三种工艺均实现了对有机物和营养物的有效去除,除倒置A^2/O工艺在低碳源进水时对TP的去除效果较差外,各工艺在低、中、高碳源进水时的各项出水水质指标均能够满足一级B排放标准。对COD、NH_4^+-N、TN、TP的去除率分别达到(92.07%~93.32%)、(95.26%~96.49%)、(72.92%~77.72%)和(81.50%~88%)。其中,两种倒置A^2/O工艺由于缺氧池碳源充足,脱氮效率较高,而传统A^2/O工艺由于厌氧池聚磷菌所需VFA充足和缺氧池反硝化除磷作用,除磷效果更好。
The nitrogen and phosphorus removal efficiencies of the traditional A^2/O process, the simply reversed A^2/O process and the step-feed reversed A^2/O process were simulated by the GPS-X software to determine the best process under the same conditions of construction investment and running cost. According to the simulation results, all three kinds of processes could achieve the effective removal of organic matter and nutrients. Except for the poor TP removal efficiency of the simply reversed A^2/O process under low carbon source concentration, the indexes of effluent quality of the three kinds of processes under low, medium and high levels of carbon source could meet the first B level criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Plant （ GB 18918 - 2002）. The removal rates of COD, NH4^＋ - N, TN and TP were 92.07% to 93.32% 95.26% to 96.49%, 72.92% to 77.72% and 81.50% to 88%, respectively. Due to the sufficient carbon source in the anoxic tank, the two kinds of reversed A^2/O processes had higher nitrogen removal efficiency, while the traditional A^2/O process had higher phosphorus removal efficiency, owing to the sufficient VFA for phosphorus-accumulating bacteria in anaerobic tank and the denitrifying phosphorus removal in anoxic tank.
出处
《中国给水排水》
CAS
CSCD
北大核心
2016年第19期26-30,共5页
China Water & Wastewater
