混合填料生物接触氧化法处理生活污水的研究

Treatment of Domestic Wastewater Using Mixed Submersed Carrier Biological Contact Oxidation

采用混合型（火山岩和陶瓷环）填料生物接触氧化工艺处理实际生活污水,研究了混合型填料挂膜情况,不同HRT、DO和进水COD浓度对水质净化效果的影响。实验结果表明：混合型填料挂膜效果好,15 d后反应器达到稳定状态,对COD的去除率达到75%以上;在水温为20~32℃,HRT为12 h,DO为5~6 mg/L的条件下,对COD、氨氮、TN和TP的平均去除率分别达到了75.8%、71.8%、45.9%和35.7%;当进水COD浓度为100~400 mg/L时,各个指标的去除率随着COD浓度的升高而升高,可见进水COD浓度会对污水净化效果产生影响。

A contact oxidation process with mixed submersed carrier （volcanic rock and ceramic ring） was applied to treating domestic wastewater to study influence on water quality decontamination under different HRT, DO and influent COD concentrations. Results showed that mixed submersed carrier was good for biofilm colonizing, removal efficiency of COD could be above 75% and reactor achieved stable condition after 15days. Under the condition of water temperature 20-32℃, HRT 12 h and DO concentration of 5-6 mg/L, average removal rates of COD, NH4＋N, TN and TP were 75.8%, 71.8%,45.9% and 35.7% respectively. When the concentration of influent COD was between 100mg/L and 400 mg/L, average removal efficiency of COD, NH4＋-N, TN and TP increased with the elevation influent COD concentrations, which indicated that the concentration of influent COD could affect water quality decontamination.