自生动态膜生物反应器处理城市污水

采用自生动态膜生物反应器（SFDMBR）处理城市污水，结果表明，在整个试验期间反应器对COD的平均去除率为81％，在稳定运行期间，对氨氮的平均去除率为87％，对总磷的平均去除率为70％；两边侧向曝气的效果明显优于单边侧向曝气，它不仅能够加大膜片间的错流流速，而且还能使错向流更加均匀；自生动态膜的形成较恢复快，且恢复速度随运行时间的延长呈递增趋势；出水水头、污泥浓度、膜通量、混合液粘度、膜面错流流速等对膜阻力有影响。

Self-forming Dynamic Membrane Bio-reactor for Domestic Wastewater Treatment

The test using self-forming dynamic membrane bio-reactor(SFDMBR) to treat municipal wastewater was carried out.The results show that in the whole treatment,the removal rate of COD is averaged at 81%,and after steady,there is an average NH_3-N removal rate of 87% and an average TP removal rate of 70%.Furthermore,it is found that both sides lateral aeration is obviously better than unilateral aeration.It can increase the cross-flow velocity along membrane surface,and make the distribution of velocity more symmetrically.The formation of self-forming dynamic membrane is faster than its recovery,and recovery velocity shows a tendency of increment with time.The parameters affecting the membrane efficiency include water head,MLSS,membrane flux,viscosity of mixing liquid,and cross-flow velocity.