Department of Hydraulic and Environmental Engineering, Norwegian University of Science and Technology, Norway.
Water Sci Technol. 2012;66(3):588-93. doi: 10.2166/wst.2012.211.
A two-stage biofilm-membrane bioreactor (MBR) was developed in this study. High total nitrogen removal (maximum: 81.4% with recycle ratio = 3.5) was observed by recycling the suspension liquid between an anaerobic FBBR and an aerobic MBBR. Very low (less than 60 mg/L) suspended solids was kept in the membrane unit, which could improve the membrane filtration performance. Membrane fouling was further reduced by increasing the recycle ratio. When influent organic load increased, the membrane fouling rate increased, coupling with higher FCOD and suspended solids (SS) values in the feed solution around the membrane.
本研究开发了一种两级生物膜-膜生物反应器（MBR）。通过在厌氧 FBBR 和有氧 MBBR 之间循环悬浮液，实现了高总氮去除（最大：81.4%，循环比=3.5）。在膜单元中保持非常低（小于 60mg/L）的悬浮固体，可以改善膜过滤性能。通过增加循环比进一步减少了膜污染。当进水有机负荷增加时，膜污染速率增加，与膜周围进料溶液中更高的 FCOD 和悬浮固体（SS）值相关。
