MBR处理微污染河水试验

采用絮凝沉淀+缺氧/膜生物反应器(Anoxic/Membrane Bioreactor，A/MBR)工艺对劣Ⅴ类微污染河水的处理进行了中试研究，探讨了该工艺对低碳高氮磷河水处理效果的保证措施. 结果表明:系统处理规模为10 m3/d，在曝气量为8 m3/h，平流沉淀池、缺氧池和膜池水力停留时间分别为25 min，0.8 h和2.5 h，污泥ρ(MLSS)为6.0～6.5 g/L的运行条件下，向缺氧池投加约为理论量2倍的甲醇，在平流沉淀池与膜池分别投加10和5 mg/L的聚合氯化铝(PAC)，出水ρ(COD_Cr)，ρ(BOD₅)，ρ(NH₃-N)和ρ(TP)达到《地表水环境质量标准》(GB3838—2002)Ⅲ类水体标准，ρ(TN)<15 mg/L. 

Treatment of Micro-Polluted River Water by MBR

A pilot study was carried out to treat inferior Ⅴ grade micro-polluted river water by Anoxic/Membrane bioreactor (A/MBR) combined with pretreatment with coagulation and sedimentation. The process conditions and measures were investigated to achieve good effluent quality in terms of treating the micro-polluted river water with high concentrations of nitrogen and phosphorus and low concentrations of carbon. The pilot system with a capacity of 10 m3/d worked at air flow-rate 8 m3/h and HRT of the sedimentation tank, anoxic tank and membrane tank at 25 min, 0.8 h and 2.5 h respectively, and under the additional conditions of MLSS concentration 6.0～6.5 g/L. The polymeric aluminums (PAC) were dosed 10 mg/L in the sedimentation tank and 5 mg/L in the membrane tank respectively, and about two times the theoretical methanol quantity was dosed in the anoxic tank. The results showed that the mass concentrations of COD_Cr, BOD₅, NH₃-N and TP in the effluent could meet the grade Ⅲ standards of Environmental Quality Standards for Surface Water (GB3838-2002), and TN was less than 15 mg/L.