PF-MBR处理城市生活污水的试验研究

Study on Municipal Domestic Sewage Treatment with PF-MBR

为进一步提高膜生物反应器中污染物的生化降解效率,自行设计制作铁氧体粉末膜生物反应器(PF-MBR),并用之处理城市生活污水。结果表明,随着DO浓度的增加,系统对COD及NH4+-N的去除率逐渐增大;当HRT>6 h时,其对COD及NH4+-N去除率的影响不大;随着铁氧体粉末投加量的增加,系统对COD和NH4+-N的去除率均明显增大,表明增加铁氧体粉末投加量有利于系统对COD和NH4+-N的去除;随着铁氧体粉末的比饱和磁化强度的增加,系统对COD和NH4+-N的去除率均增大,但幅度不大。PF-MBR稳定运行期间对COD的平均去除率达到了96.0%,对NH4+-N的平均去除率为93.3%。机理分析表明,膜生物反应器中加入铁氧体粉末后,在微生物降解、磁场能等共同作用下,实现了对污染物去除率的提高。

In order to increase the biochemical treatment efficiency of pollutants in MBR, a MBR with powdered ferrite （PF-MBR） was designed and used to treat municipal domestic sewage. The results show that the removal rates of COD and NH4＋ - N increase with the increase of DO. The removal rates of COD and NH4＋ - N are not significantly affected by HRT when it is more than 6 h. The removal rates of COD and NH4 - N increase markedly with the increase of the dosage of powdered ferrite. It indicates that the increase of powdered ferrite dosage is useful for the removal of COD and NH4 - N. The removal rates of COD and NH4＋ - N increase with the increase of the specific saturation magnetization intensity of powdered ferrite, but not by much. During stable operation, the removal rates of COD and NH4 - N are 96.0% and 93.3% respectively. The mechanism analysis shows that the increasing of the removal rates of pollutants is due to the combined action of microbial degradation and magnetic field energy after adding powdered ferrite to MBR.