Abstract: A non-woven membrane bioreactor (NWMBR) was established to treat bathing wastewater. The experimental results showed that COD，BOD5，LAS，NH3-N and turbidity in effluent were less than 20 mg/L，3 mg/L，0.3mg/L，0.5 mg/L and 0.5 NTU，respectively under conditions of the loading=0.64 kgCOD/(m3?d)，MLSS=5 g/L，HTR=6.3 h and membrane flux=13 L/(m2?h). A loose cake layer formed with the weight of 9.3 g/m2 after NWMBR stable run fifty days at 13 L/(m2?h) conditions. A dense cake layer consisting of carboxylic acid，proteins，polysaccharides and inorganic crystalline formed under the condition of membrane flux=18 L/(m2?h). Various chemical reagents and cleaning methods were examined to prevent membrane fouling. And the backwash style using sodium hypochlorite performed better than other reagents in the prevention of membrane fouling. This method could recover 98% water flux and restore the average pore size from 8.25 μm to 47.2 μm.

Key words: Membrane bioreactor, Non-woven membrane, Bathing wastewater, Membrane fouling, membrane bioreactor, non-woven membrane, bathing wastewater, membrane fouling

摘要： 利用自行开发的无纺布膜生物反应器（NWMBR）处理洗浴废水。结果表明，在有机负荷0.64 kgCOD/(m3?d)、污泥浓度5 g/L、水力停留时间6.3 h和膜通量13 L/(m2?h)条件下，出水可始终稳定在COD<20 mg/L，BOD5<3 mg/L，LAS<0.3 mg/L，NH3-N<0.5 mg/L以及浊度<0.5 NTU。在13 L/(m2?h)通量下膜表面形成松散的泥饼层，反应器稳定运行约50天后泥饼层泥量达到9.3 g/m2时导致膜污染的发生；当通量升至18 L/(m2?h)时迅速形成密实的泥饼层导致膜污染。经过分析发现，膜表面污染物主要由亲水有机物、羧酸类、多糖类、蛋白质类等有机物质组成，也存在少量的由Na、Ca、Si、Al等元素形成的无机污染。采用次氯酸钠反冲式清洗，可使无纺布膜的清水通量恢复率达98%，膜平均孔径可从8.25 μm恢复至47.2 μm。

关键词: 膜生物反应器, 无纺布, 洗浴废水, 膜污染, 膜生物反应器, 无纺布, 洗浴废水, 膜污染