Sequencing batch membrane biofilm reactor for simultaneous nitrogen and phosphorus removal: Novel application of membrane‐aerated biofilm
Sequencing batch membrane biofilm reactor for simultaneous nitrogen and phosphorus removal: Novel application of membrane‐aerated biofilm
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DOI：
10.1002/bit.20887
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发表时间：
2006-07
影响因子：
3.8
通讯作者：
A. Terada;Tetsuya Yamamoto;S. Tsuneda;A. Hirata
中科院分区：
文献类型：
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作者：
A. Terada;Tetsuya Yamamoto;S. Tsuneda;A. Hirata
设计了一种间歇式膜生物反应器（SBMBfR），用于同时去除废水中的碳、氮、磷。该反应器由两个功能部分组成：(1)形成硝化生物膜的透气膜和(2)悬浮细菌（主要是反硝化聚磷生物（DNPAOs））的散装溶液。反应器在厌氧和膜曝气条件下依次运行一个循环。厌氧过程中，有机碳被DNPAOs消耗；这伴随着磷酸盐的释放。在随后的膜曝气过程中，硝化细菌利用从膜内部直接提供给它们的氧气。因此，亚硝酸盐和硝酸盐产物扩散到体溶液中，在那里它们被DNPAOs用作磷酸吸收的电子受体。在长期测序间歇操作中，稳态条件下总有机碳（TOC）、总氮（T‐N）和总磷（T‐P）的平均去除率分别为99%、96%和90%。此外，荧光原位杂交（FISH）清楚地显示了膜生物膜与悬浮污泥之间细菌群落结构的差异：在整个操作过程中，亚硝化单胞菌群的氨氧化细菌在靠近膜的区域占主导地位，而众所周知的聚磷酸盐积累菌（PAO）候选菌在悬浮污泥中的占比逐渐增加，最高可达37%。©2006 Wiley期刊公司
A sequencing batch membrane biofilm reactor (SBMBfR) was developed for simultaneous carbon, nitrogen, and phosphorus removal from wastewater. This reactor was composed of two functional parts: (1) a gas‐permeable membrane on which a nitrifying biofilm formed and (2) a bulk solution in which bacteria, mainly denitrifying polyphosphate‐accumulating organisms (DNPAOs), were suspended. The reactor was operated sequentially under anaerobic condition and then under membrane aeration condition in one cycle. During the anaerobic period, organic carbon was consumed by DNPAOs; this was accompanied by phosphate release. During the subsequent membrane aeration period, nitrifying bacteria utilized oxygen supplied directly to them from the inside of the membrane. Consequently, the nitrite and nitrate products diffused into the bulk solution, where they were used by DNPAOs as electron acceptors for phosphate uptake. In a long‐term sequencing batch operation, the mean removal efficiencies of total organic carbon (TOC), total nitrogen (T‐N), and total phosphorus (T‐P) under steady‐state condition were 99%, 96%, and 90%, respectively. In addition, fluorescence in situ hybridization (FISH) clearly demonstrated the difference in bacterial community structure between the membrane biofilm and the suspended sludge: ammonia‐oxidizing bacteria belonging to the Nitrosomonas group were dominant in the region adjacent to the membrane throughout the operation, and the occupation ratio of the well‐known polyphosphate‐accumulating organism (PAO) Candidatus “Accumulibacter phosphates” in the suspended sludge gradually increased to a maximum of 37%. © 2006 Wiley Periodicals, Inc.