Kiki Claude, Ye Xin, Li Xi, Adyari Bob, Hu Anyi, Qin Dan, Yu Chang-Ping, Sun Qian
CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100043, China; National Institute of Water, University of Abomey-Calavi, 01 BP: 526 Cotonou, Benin.
CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China.
J Hazard Mater. 2022 Jul 15;434:128910. doi: 10.1016/j.jhazmat.2022.128910. Epub 2022 Apr 14.
The attenuation of 10 mixed antibiotics along with nutrients in a continuous flow mode by four freshwater microalgae (Haematococcus pluvialis, Selenastrum capricornutum, Scenedesmus quadricauda, and Chlorella vulgaris) was examined in membrane photobioreactors (MPBRs). At lab-scale, consistent removal of both antibiotic and nutrient was shown by H. pluvialis and S. quadricauda, respectively. The system exhibited better performance with enhanced removal at HRT 24 h compared to 12 h and 48 h. The highest removal efficiency of antibiotics was observed in H. pluvialis MPBR, with the mean antibiotic removal values of 53.57%- 96.33%. Biodegradation was the major removal pathway of the antibiotics in the algal-MPBR (AMPBR), while removal by bioadsorption, bioaccumulation, membrane rejection, and abiotic was minor. Then, the bacterial feature was studied and showed significant influence from system hydrodynamics. The kinetics of continuous flow antibiotic removal followed Stover-Kincannon and Grau second-order models, which revealed great potential of AMPBR to withstand antibiotic load. The latter coupled with the computational fluid dynamic simulation was successfully applied for the residual antibiotic prediction and potential system optimization. Overall, these results provide an important reference for continuous flow antibiotic removal using AMPBR.
在膜光生物反应器（MPBRs）中，研究了4种淡水微藻（雨生红球藻、羊角月芽藻、四尾栅藻和普通小球藻）以连续流模式对10种混合抗生素以及营养物质的去除效果。在实验室规模下，雨生红球藻和四尾栅藻分别对抗生素和营养物质表现出持续的去除效果。与12小时和48小时相比，该系统在水力停留时间（HRT）为24小时时表现出更好的性能，去除效果增强。在雨生红球藻MPBR中观察到抗生素的最高去除效率，抗生素的平均去除值为53.57% - 96.33%。生物降解是藻类 - MPBR（AMPBR）中抗生素的主要去除途径，而生物吸附、生物积累、膜截留和非生物去除作用较小。然后，对细菌特性进行了研究，结果表明系统流体动力学对其有显著影响。连续流抗生素去除动力学遵循Stover - Kincannon模型和Grau二级模型，这表明AMPBR具有承受抗生素负荷的巨大潜力。后者与计算流体动力学模拟相结合，成功应用于残留抗生素预测和潜在的系统优化。总体而言，这些结果为使用AMPBR连续去除抗生素提供了重要参考。
