复合膜生物反应器处理生活污水的特性

Characteristics of domestic wastewater treated by combination submerged membrane bioreactor

通过对投加填料的膜生物反应器处理生活污水的特性进行了系统的研究 ,研究结果表明投加填料的膜生物反应器的上清液及系统出水COD浓度低于不加填料的 ;反应器稳定运行后膜的通透性随运行时间的延长而缓慢下降 ,且较投加填料前明显增大 ;反应器中 ,附着相和悬浮相污泥共存 ,并以附着生长的微生物为主 ,悬浮污泥浓度低可以有效的减缓膜过滤阻力的上升和膜的堵塞 .维持反应器内总污泥浓度较高的条件下 ,使随混合液进入膜分离的悬浮污泥量保持很低 ,减少了其对膜的通透能力的影响 .

By adding filler, the characteristics of domestic wastewater treated using membrane bioreactor was discussed. The results showed that COD of supernatant fluid and effluent of system in combination submerged membrane bioreactor was lower than non-adding filler's; membrane permeability at the steady state slowly declined with time, and obviously augmented by comparison with before adding filler;attach and suspended sludge coexist, and main microbe was attach growth, lower suspended sludge concentration can effectively reduce resistance of membrane filtration and membrane clog. In keeping higher total sludge concentration, suspended sludge mass entering into membrane separation with mixture liquid was low, thus decreased affect on membrane permeability.