Bracklow U, Manigas L, Drews A, Vocks M, Barjenbruch M, Kraume M
Department of Urban Water Management TIB 1B-16, TU Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany.
Water Sci Technol. 2007;56(6):115-24. doi: 10.2166/wst.2007.641.
For membrane bioreactors (MBR) with enhanced nutrients removal, rather complex recirculation schemes based on the biological requirements are commonly recommended. The aim of this work was to evaluate other recirculation options. For a laboratory scale MBR, four different recirculation schemes were tested. The MBR was operated with COD degradation, nitrification, post-denitrification without carbon dosing and biological phosphorus removal. For all configurations, efficient COD, nitrogen and phosphorus removal could be achieved. There were no big differences in elimination efficiency between the configurations (COD elimination: 96.6-97.9%, nitrogen removal: 89.7-92.1% and phosphorus removal: 97.4-99.4%). Changes in the degradation, release and uptake rates were levelled out by the changes in contact time and biomass distribution. With relatively constant outflow concentrations, different configurations are still interesting with regard to oxygen consumption, simplicity of plant operation or support of certain degradation pathways such as biological phosphorus removal or denitrification.
对于具有强化营养物去除功能的膜生物反应器（MBR），通常会推荐基于生物需求的相当复杂的循环方案。这项工作的目的是评估其他循环选项。对于一个实验室规模的MBR，测试了四种不同的循环方案。该MBR在COD降解、硝化、无碳投加的后置反硝化和生物除磷条件下运行。对于所有配置，都能实现高效的COD、氮和磷去除。各配置之间的去除效率没有太大差异（COD去除率：96.6 - 97.9%，氮去除率：89.7 - 92.1%，磷去除率：97.4 - 99.4%）。降解、释放和吸收速率的变化通过接触时间和生物量分布的变化而趋于平稳。在流出物浓度相对恒定的情况下，不同配置在氧气消耗、装置操作的简易性或对某些降解途径（如生物除磷或反硝化）的支持方面仍然具有吸引力。
