National Engineering Research Center for Urban Pollution Control, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
National Engineering Research Center of Urban Water Resources, Shanghai National Engineering Research Center of Urban Water Resources Co. Ltd, Shanghai 200082, PR China.
Sci Total Environ. 2016 Nov 1;569-570:1289-1298. doi: 10.1016/j.scitotenv.2016.06.205. Epub 2016 Jul 16.
In order to improve our understanding of bio-activated carbon (BAC) filter, the water quality of influent and effluent treated with BAC in a drinking water treatment plant (DWTP) of Shanghai during 2015 was valued. Combining the results from UV254, SUVA254, dissolved organic carbon (DOC) and scanning electron microscopic (SEM), it is found that performance of BAC treatment will be affected by characteristics of activated carbon (AC), which is relevant to the type of activated carbon (including shape and operating time) in this study. Fluorescence excitation-emission matrix (FEEM) shows that the humification index (HIX) and index of recent autochthonous contribution (BIX) is a reliable indicator to descript the variation of dissolved organic matter (DOM) during BAC process. The pattern of variation in BIX and HIX implies that soluble microbial products (SMPs) are formed and humic-like substances are removed during BAC treatment, which is also confirmed by the change of peaks of FEEM in BAC effluent. Large, positive correlations between SUVA254 and disinfection by-products formation potential yield (DBPFP yield) demonstrate that UV-absorbing DOM is directly related to the generation of DBPs. Poor correlations of HIX with DBPFP suggest that non-humic substances with UV-absorbing properties play an important role in the generation of DBPs in water with low SUVA254. Finally, strong but negative correlations between BIX and DBPFP suggest that vigorous microbial metabolism of BAC results in a decrease in DBPFP. However, the DBPFP yield will be enhanced for the generation of SMPs by BAC, especially in summer.
为了增进对生物活性炭（BAC）过滤器的了解，评估了 2015 年上海某饮用水处理厂（DWTP）中 BAC 处理进水和出水的水质。结合 UV254、SUVA254、溶解有机碳（DOC）和扫描电子显微镜（SEM）的结果发现，BAC 处理的性能会受到活性炭（AC）特性的影响，这与研究中活性炭的类型（包括形状和运行时间）有关。荧光激发-发射矩阵（FEEM）表明，腐殖化指数（HIX）和近期自生源贡献指数（BIX）是描述 BAC 过程中溶解有机物（DOM）变化的可靠指标。BIX 和 HIX 的变化模式表明，在 BAC 处理过程中形成了可溶性微生物产物（SMPs）并去除了腐殖质样物质，这也得到了 BAC 出水中 FEEM 峰变化的证实。SUVA254 与消毒副产物生成潜力（DBPFP 生成）之间存在较大的正相关，表明具有紫外吸收特性的 DOM 与 DBPs 的生成直接相关。HIX 与 DBPFP 之间的相关性较差表明，在低 SUVA254 水中，具有紫外吸收特性的非腐殖质物质在 DBPs 的生成中起着重要作用。最后，BIX 与 DBPFP 之间存在强烈但负相关，表明 BAC 强烈的微生物代谢会降低 DBPFP。然而，由于 BAC 会产生 SMPs，DBPFP 的生成会增加，尤其是在夏季。
