A/O膜生物反应器生活污水回用处理中试研究

Pilot Study on the Domestic Wastewater Treatment and Reuse Using an A/O Membrane Bioreactor

采用中试规模的缺氧-好氧一体式膜生物反应器(A/O MBR)对生活污水处理回用进行了试验研究。试验结果表明,该工艺处理效果优良,系统对COD、氨氮的平均去除率分别为94.7%和99.08%,膜分离截留对COD的去除起到了决定性作用,生物对NH4+-N的去除占主要作用,膜本身对NH4+-N的直接去除作用不大。出水COD、氨氮的浓度分别为16.02 mg/L和0.35 mg/L,出水水质优于城市杂用水水质标准(GB/T l8920-2002)和河道景观环境用水水质标准(GB/T l8921-2002)。该系统运行稳定,具有较强的抗冲击负荷能力,工艺基本无污泥排放。

The pilot-scale of anaerobic-aerobic submerged membrane bioreactor （A/O MBR） for the treatment and reuse of the domestic wastewater was introduced in this paper. The experimental results showed that the system＇s ability was good for the removal of COD and NH^＋4^-N, The average removal efficiencies of COD and NH^＋4^-N were 94.7% and 99.08% respectively, Membrane separation and holding played a decisive role on the removal of COD, biological reaction played an important role on the removal of NH^＋4^-N. The concentration of COD and NH^＋4^-N in the effluent were 16.02 mg/L and 0.35 mg/L respectively. The quality of the effluent was better than the requirements of national standards （GB/T 18920-2002）and （GB/T18921-2002）, The stability of the operation showed its good ability to against the load impact, and there was almost no sludge produced,