Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in sewage treatment plants.
Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) in sewage treatment plants.
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DOI：
10.1016/j.watres.2009.03.009
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发表时间：
2009-05
期刊：
影响因子：
12.8
通讯作者：
Jing Yu;Jiangyong Hu;Shuhei Tanaka;S. Fujii
中科院分区：
文献类型：
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作者：
Jing Yu;Jiangyong Hu;Shuhei Tanaka;S. Fujii
本研究对不同规模的城市污水处理厂生物单元中全氟辛烷磺酸和全氟辛烷磺酸的浓度进行了测定。从进水、一级出水、曝气池出水、最终出水、一级污泥、活性污泥、二级污泥和厌氧消化污泥的抓取样品，分5次取样，历时一年。本研究选择的两个污水处理厂(STP)包括A厂处理95%的生活污水，B厂处理60%的工业废水和40%的生活废水。B厂的水和污泥样品中全氟辛烷磺酸和全氟辛烷磺酸的浓度高于A厂。在B厂的常规活性污泥法(CAS)中，全氟辛烷磺酸的质量流量显著增加(平均为94.6%)，而在A厂的二次处理后，全氟辛烷磺酸的质量流量保持不变。我们的结果表明，在短污泥停留时间(SRT)下运行的活性污泥法处理后，这两种化合物的质量流量保持一致。A厂的原水全氟辛烷磺酸浓度存在季节变化，而A厂和B厂的全氟辛烷磺酸没有显著的季节变化。
In this study, the concentrations of PFOS and PFOA in the biological units of various full-scale municipal sewage treatment plants were measured. Samples of influent, primary effluent, aeration tank effluent, final effluent and grab samples of primary, activated, secondary and anaerobically digested sludge were collected by 5 sampling events over one year. The two sewage treatment plants (STPs) selected for this study include plant A receiving 95% domestic wastewater and plant B receiving 60% industrial wastewater and 40% domestic wastewater. PFOS and PFOA were observed at higher concentration in aqueous and sludge samples in plant B than that of plant A. Mass flow of PFOS increased significantly (mean 94.6%) in conventional activated sludge process (CAS) of plant B, while it remained consistent after the secondary treatment in plant A. Mass flow of PFOA increased 41.6% (mean) in CAS of plants A and B and 76.6% in membrane biological reactor (MBR), while it remained unchanged after the treatment of liquid treatment module (LTM). Our results suggest that mass flow of these two compounds remains consistent after treatment of activated sludge process operating at short sludge retention time (SRT). Seasonal variations of PFOS in concentrations of raw sewage were found in plant A, while PFOA did not have significant seasonal variation in both plants A and B.