新型移动床膜生物反应器处理PVA废水的实验研究

将移动床生物膜反应器（MBBR）与膜生物反应器（MBR）有机结合，形成一体化式新型移动床膜生物反应器（M—MBBR）。采用M—MBBR对PVA废水的处理效果进行了研究，介绍了反应器的结构，并考察了水力停留时间、COD容积负荷及曝气量等操作条件对处理效果的影响。实验结果表明，在水力停留时间8h，气水比为120：1，COD容积负荷在1．4—2．8kg／（m^3·d）范围内变化时处理效果最佳且出水保持稳定。在此操作条件下，M—MBBR对PVA和COD的去除率可分别达到54％和69％左右。

Study on the Treatment Effect of PVA-size Waste Waterby Membrane-moving Bed Biofilm Reactor

Membrane - moving bed biofilm reactor（ M - MBBR） is the combination of moving bed biofilm reactor（MBBR） and membrane bioreactor（MBR）. The performance of M - MBBR for the treatment of PVA - size wastewater was studied. The reactor＇s structure was introduced, and the changes of operation conditions including hydraulic retention time, volumetric organic loading and ventilation quantity on the treating effects were investigated. The results showed that if volumetric organic loading varied between 1.4 -21 8 kg/（m^3 · d）in the experiment which was carried out at hydraulic retention time 8 h and gas -water ratio 120 ： 1, the PVA -size wastewater could be most effectively treated and keep stability. Correspondingly, M -MBBR may remove as much as 54% and 69% of PVA and COD repectively.