In this work, the variation of fluorescent dissolved organic matters (FDOM) of antibiotic wastewater in a full-scale treatment plant was studied. Fluorescent components of anaerobic, aerobic, Fenton stages were separately figured out by parallel factor analysis (PARAFAC) based on excitation emission matrix (EEM) dataset. Then, these components were pairwise quantitatively compared according to cosine similarity (CS). It was found that, after the anaerobic treatment, the major components showed remarkable similarity (CS > 0.97) to those of raw wastewater, although their maximum fluorescence intensity (F_max) decreased slightly or moderately (7%～54%). However, the aerobic treatment dramatically changed both the composition and content of fluorescent components, as all the protein-like components completely disappeared and only the humic-like components with much lower intensity were observed. After Fenton oxidation, all these humic-like components were remained (CS > 0.97) with fairly reduced F_max (51%～61%). For both aerobically treated and Fenton-oxidized wastewater, F_max correlated well with dissolved organic carbon (DOC). This suggested a dominant proportion of humic-like substances. The combination of PARAFAC based on separate EEM dataset of each treatment stage and CS assessment is a good approach to better understand FDOM variation and can be of much practical significance to monitor wastewater quality.

在这项工作中，研究了大规模污水处理厂中抗生素废水的荧光溶解有机物（FDOM）的变化。通过基于激发发射矩阵（EEM）数据集的并行因子分析（PARAFAC）分别计算出厌氧，好氧，Fenton阶段的荧光成分。然后，根据余弦相似度（CS）对这些成分进行成对定量比较。发现在厌氧处理后，主要成分与原废水的主要成分表现出显着的相似性（CS> 0.97），尽管它们的最大荧光强度（F _max）略有下降（7％〜54％）。然而，有氧处理极大地改变了荧光成分的组成和含量，因为所有的类蛋白成分都完全消失了，只观察到强度低得多的类腐殖质成分。Fenton氧化后，所有这些类腐殖质组分均保留下来（CS> 0.97），F _max降低了（51％〜61％）。对于需氧处理的和Fenton氧化的废水，F _max与溶解有机碳（DOC）的相关性很好。这表明占主导地位的是腐殖质样物质。基于每个处理阶段的单独EEM数据集和CS评估相结合的PARAFAC是更好地了解FDOM变化的好方法，并且对于监测废水质量具有重要的实际意义。