Effect of Powdered Activated Carbon as Advanced Step in Wastewater Treatments on Antibiotic Resistant Microorganisms
Effect of Powdered Activated Carbon as Advanced Step in Wastewater Treatments on Antibiotic Resistant Microorganisms
复制标题
DOI：
10.2174/1389201020666190207095556
复制
发表时间：
2019-01
影响因子：
2.8
通讯作者：
D. Ravasi;Roger König;Pamela Principi;G. Perale;Antonella Demarta
中科院分区：
文献类型：
--
作者：
D. Ravasi;Roger König;Pamela Principi;G. Perale;Antonella Demarta
背景资料：传统的废水处理厂将大量的抗生素抗性细菌和抗生素抗性基因排放到自然水体中，导致抗生素抗性的传播。一些先进的废水处理技术已被证明可以有效地减少细菌的数量。然而，仍然缺乏关于这些治疗对抗生素耐药细菌和抗生素耐药基因的有效性的知识。据我们所知，没有具体的研究考虑粉末活性炭（PAC）处理如何对抗生素耐药性细菌起作用，尽管评估这种废水处理对抗生素耐药性细菌传播的影响至关重要。为了弥补这一差距，我们在一个实验室规模的模拟模型中评估了荧光标记的抗生素/抗真菌药耐药微生物的命运和分布，采用粉末活性炭作为废水深度处理的工艺配置。此外，我们研究了在实施PAC回收的处理过程中，天然存在的抗生素抗性细菌的可能增加。结果如下：荧光标记微生物的分析表明，PAC吸附处理在降低处理后的水中的敏感和抗性荧光微生物的负荷，达到99.70%的去除效率的有效性。此外，PAC的循环使用并没有增加污泥和处理后出水中可培养细菌的抗性特性。结论：结果表明，聚合氯化铝处理废水，不仅是一种很有前途的技术，以去除微污染物，而且它的效果，减少抗生素耐药菌的释放。
Background: Conventional wastewater treatment plants discharge significant amounts of antibiotic resistant bacteria and antibiotic resistance genes into natural water bodies contributing to the spread of antibiotic resistance. Some advanced wastewater treatment technologies have been shown to effectively decrease the number of bacteria. Nevertheless, there is still a lack of knowledge about the effectiveness of these treatments on antibiotic resistant bacteria and antibiotic resistant genes. To the best of our knowledge, no specific studies have considered how powdered activated carbon (PAC) treatments can act on antibiotic resistant bacteria, although it is essential to assess the impact of this wastewater treatment on the spread of antibiotic resistant bacteria Methods: To address this gap, we evaluated the fate and the distribution of fluorescent-tagged antibiotic/antimycotic resistant microorganisms in a laboratory-scale model simulat-ing a process configuration involving powdered activated carbon as advanced wastewater treatment. Furthermore, we studied the possible increase of naturally existing antibiotic re-sistant bacteria during the treatment implementing PAC recycling. Results: The analysis of fluorescent-tagged microorganisms demonstrated the efficacy of the PAC adsorption treatment in reducing the load of both susceptible and resistant fluores-cent microorganisms in the treated water, reaching a removal efficiency of 99.70%. Moreo-ver, PAC recycling did not increase the resistance characteristics of cultivable bacteria nei-ther in the sludge nor in the treated effluent. Conclusion: Results suggest that wastewater PAC treatment is a promising technology not only for the removal of micropollutants but also for its effect in decreasing antibiotic re-sistant bacteria release.