...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biotechnology and Bioengineering >Sequencing batch membrane biofilm reactor for simultaneous nitrogen and phosphorus removal: Novel application of membrane-aerated biofilm
【24h】

Sequencing batch membrane biofilm reactor for simultaneous nitrogen and phosphorus removal: Novel application of membrane-aerated biofilm

机译：顺序分批膜生物膜反应器可同时去除氮和磷：膜曝气生物膜的新应用

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

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%. (c) 2006 Wiley Periodicals, Inc.
机译：开发了一种测序批膜生物膜反应器（SBMBfR），用于同时去除废水中的碳，氮和磷。该反应器由两个功能部分组成：（1）在其上形成硝化生物膜的透气膜;（2）悬浮有细菌的本体溶液，细菌主要是反硝化的聚磷酸盐积累生物（DNPAOs）。该反应器在厌氧条件下依次运行，然后在一个膜曝气条件下运行一个循环。在厌氧期间，DNPAOs消耗了有机碳。这伴随着磷酸盐的释放。在随后的膜曝气期间，硝化细菌利用了从膜内部直接供应给它们的氧气。因此，亚硝酸盐和硝酸盐产物扩散到本体溶液中，DNPAO将其用作磷酸盐吸收的电子受体。在长期测序分批操作中，稳态条件下的总有机碳（TOC），总氮（TN）和总磷（TP）的平均去除效率分别为99％，96％和90％ 。此外，荧光原位杂交（FISH）清楚地表明了膜生物膜和悬浮污泥之间细菌群落结构的差异：属于亚硝基梭菌属的氨氧化细菌在整个手术过程中在膜附近区域占主导地位，并且悬浮污泥中著名的聚磷酸盐累积生物（PAO）假丝酵母“磷酸盐累积杆菌”的占有率逐渐提高到最大值37％。 （c）2006年Wiley Periodicals，Inc.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号