Proper granular activated carbon (GAC) selection could improve the performance of biological activated carbon (BAC) filters through a combination of adsorption and biodegradation, while the GACs used in BAC filters are now mainly selected according to adsorption function, ignoring biodegradation. In this study, sand filter effluent obtained from a drinking water treatment plant was fed into continuous-flow bench-scale BAC columns operated in parallel over 245 days to examine the effects of GAC pore-size distribution on BAC filter performance, in terms of the dissolved organic carbon (DOC) and disinfection byproduct (DBP) precursors. A metagenomic analysis indicated that bacterial community structure played an important role in BAC filter performance. A significant correlation was found between metabolism-related proteins and the volume of micro-level macropores based on metaproteomic analysis. It is suggested that the adsorption saturation was dynamic and that adsorption played a role in the performance of the BAC filters throughout the 245-day operating period. Renewed adsorption capacity, or bioregeneration, was driven by bacterial metabolic activity. Such activity largely depended on the organic matter adsorbed by the GAC, in which micro-level macropores, especially those with diameters of 0.2-10 μm, played an important but previously unrecognized role. The results suggest that more attention should be paid to well-developed pores and pore-size distribution in the production and selection of GAC used for full-scale drinking water biofilters.

中文翻译：

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颗粒活性炭孔径分布对生物活性炭过滤性能的影响。

正确选择颗粒状活性炭（GAC）可以通过吸附和生物降解相结合来提高生物活性炭（BAC）过滤器的性能，而现在BAC过滤器中使用的GAC主要根据吸附功能来选择，而忽略了生物降解。在本研究中，将从饮用水处理厂获得的砂滤池废水进料到连续运行245天的连续流台式BAC色谱柱中，以考察GAC孔径分布对BAC滤池性能的影响，溶解的有机碳（DOC）和消毒副产物（DBP）前体。宏基因组分析表明，细菌群落结构在BAC过滤器性能中起着重要作用。基于元蛋白质组学分析，发现代谢相关蛋白与微级大孔的体积之间存在显着相关性。这表明吸附饱和是动态的，并且在整个245天的运行期间，吸附在BAC过滤器的性能中发挥了作用。细菌的代谢活性驱动着新的吸附能力或生物再生。此类活性很大程度上取决于被GAC吸附的有机物，其中微级大孔（尤其是直径为0.2-10μm的大孔）起着重要但以前未被认识的作用。结果表明，在用于全尺寸饮用水生物滤池的GAC的生产和选择中，应更加注意发达的孔和孔径分布。这表明吸附饱和是动态的，并且在整个245天的运行期间，吸附在BAC过滤器的性能中发挥了作用。细菌的代谢活性驱动着新的吸附能力或生物再生。此类活性很大程度上取决于被GAC吸附的有机物，其中微级大孔（尤其是直径为0.2-10μm的大孔）起着重要但以前未被认识的作用。结果表明，在用于全尺寸饮用水生物滤池的GAC的生产和选择中，应更加注意发达的孔和孔径分布。这表明吸附饱和是动态的，并且在整个245天的运行期间，吸附在BAC过滤器的性能中发挥了作用。细菌的代谢活性驱动着新的吸附能力或生物再生。此类活性很大程度上取决于被GAC吸附的有机物，其中微级大孔（尤其是直径为0.2-10μm的大孔）起着重要但以前未被认识的作用。结果表明，在用于全尺寸饮用水生物滤池的GAC的生产和选择中，应更加注意发达的孔和孔径分布。细菌的代谢活性驱动着新的吸附能力或生物再生。此类活性很大程度上取决于被GAC吸附的有机物，其中微级大孔（尤其是直径为0.2-10μm的大孔）起着重要但以前未被认识的作用。结果表明，在用于全尺寸饮用水生物滤池的GAC的生产和选择中，应更加注意发育良好的孔和孔径分布。细菌的代谢活性驱动着新的吸附能力或生物再生。此类活性很大程度上取决于被GAC吸附的有机物，其中微级大孔（尤其是直径为0.2-10μm的大孔）起着重要但以前未被认识的作用。结果表明，在用于全尺寸饮用水生物滤池的GAC的生产和选择中，应更加注意发达的孔和孔径分布。