CESAM, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
CESAM, Department of Chemistry, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
Sci Total Environ. 2021 Apr 10;764:144291. doi: 10.1016/j.scitotenv.2020.144291. Epub 2020 Dec 24.
This work aims to compare the performance of the continuous operation (CO) and intermittent operation (IO) of upflow anaerobic sludge blanket (UASB) reactors for the removal of estrone (E1) and 17α-ethinylestradiol (EE2) from wastewaters. Results suggest that the IO contribute to the improvement of the overall removal of estrogens (above 95% for E1 and EE2) when compared to CO (49% for E1 and 39% for EE2). For both CO and IO, biodegradation was the main removal mechanism for E1, while for EE2, adsorption to sludge was the major removal pathway. Moreover, a higher biodegradation of estrogens was obtained with the IO compared to CO (69.4% vs. 43.3% for E1 and 21.8% vs. 8.0% for EE2). The favourable effect of IO can be justified by effluent recirculation during the feedless period which promotes the adaptation of microbial biomass to estrogens' biodegradation.
本研究旨在比较上流式厌氧污泥床（UASB）反应器连续运行（CO）和间歇运行（IO）对废水中雌酮（E1）和 17α-乙炔基雌二醇（EE2）去除效果的差异。结果表明，与 CO（E1 为 49%，EE2 为 39%）相比，IO 有助于提高雌激素的整体去除率（E1 和 EE2 均高于 95%）。对于 CO 和 IO，生物降解是 E1 的主要去除机制，而 EE2 的主要去除途径是吸附到污泥上。此外，与 CO 相比，IO 对雌激素的生物降解率更高（E1 为 69.4%，EE2 为 21.8%）。IO 的有利影响可以通过在无进料期间进行回流来解释，这促进了微生物生物量对雌激素生物降解的适应。
