Dynamic membranes (DMs) defined as cake layer forms on a support material such as filter cloth have been of great interest in recent years. The usage of DMs can reduce the capital cost significantly and energy consumption during wastewater treatment by replacing the conventional membrane. The formation of an active dynamic cake layer is highly related to the retention of particles on the support material surface. In this study, different pore sizes of monofilament woven filter cloth made of polypropylene (PP; 20, 40, and 60 μm) were installed as a flat sheet in a DM bioreactor (DMBR) to treat high strength food wastewater [>1,000 mg/L chemical oxygen demand (COD)]. The wastewater treatment performances, namely COD, turbidity, total solid separation, and total ammonia nitrogen removal efficiencies, were assessed daily. The system achieved average COD removals higher than 80% and 70% for smaller pore size and larger pore size, respectively. Based on the results (duration of 4 days), the 20 μm pore size monofilament filter cloth was found most suitable for the cake layer development. The results also demonstrate that the biofilm composed of the cake layer of the DM on smaller pore size significantly concurs with the high treatment efficiency compared with the larger pore size.

中文翻译：

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好氧膜生物反应器技术作为动态膜过滤支撑材料的单丝机织滤布孔径对性能的影响

近年来，被定义为诸如过滤布之类的支撑材料上的滤饼层形式的动态膜（DM）引起了人们的极大兴趣。DM的使用可以通过替换传统的膜来显着降低废水处理过程中的投资成本和能耗。活性动态滤饼层的形成与颗粒在载体材料表面上的保留高度相关。在这项研究中，将不同孔径的聚丙烯制成的单丝编织滤布（PP； 20、40和60μm）作为平板安装在DM生物反应器（DMBR）中，以处理高强度食品废水[> 1,000 mg / L化学需氧量（COD）]。每天评估废水处理性能，即化学需氧量，浊度，总固体分离度和总氨氮去除效率。对于较小的孔径和较大的孔径，该系统的平均COD去除率分别高于80％和70％。根据结果​​（历时4天），发现20μm孔径的单丝滤布最适合滤饼层的显影。结果还表明，与较大孔径相比，由较小孔径的DM滤饼层组成的生物膜具有较高的处理效率。