膜生物反应器处理印染废水的试验研究

Study on Treatment of Dyeing Wastewater by Membrane Bio-Reactor

通过对印染废水试验研究，使用一体式膜生物反应器（MBR）工艺处理该类废水，采用单因素试验优化工艺参数，并获得最佳工艺参数。试验结果表明，本 MBR 系统处理印染废水的最佳工艺条件是：污泥浓度5~10 g/L，溶解氧2~4 mg/L，污泥容积负荷0.7~0.8 kg COD/（m3·d），水力停留时间15~20 h，出水的COD去除率在90%上下。

The performance of membrane bio-reactor （MBR） for treating dyeing wastewater was studied. The optimal operation parameters were determined as follows： the concentration of mixed liquid suspended solids （MLSS） 5~10 g/L, the concentration of dissolved oxygen （DO） 2~4 mg/L, the sludge volume loading 0.7~0.8 kg COD/（m3·d）, hydraulic retention time （HRT） 15~20 h. Under above conditions, the removal efficiency of COD was about 90%.