Department of Chemical and Nuclear Engineering, Universitat Politècnica de València, C/Camino de Vera, s/n, 46022, Valencia, Spain.
Instituto Ingeniería del Agua y Medio Ambiente, Universitat Politècnica de València, C/Camino de Vera, s/n, 46022, Valencia, Spain.
J Environ Manage. 2020 Jun 1;263:110368. doi: 10.1016/j.jenvman.2020.110368. Epub 2020 Mar 19.
Nowadays, alternative options to conventional wastewater treatment should be studied due to rising concerns emerged by the presence of pharmaceuticals compounds (PhCs) in the aquatic environment. In this work, a combined system including biological treatment by activated sludge plus adsorption with activated carbon is proposed to remove three selected drugs (acetaminophen (ACT), caffeine (CAF) and ibuprofen (IBU)) in a concentration of 2 mg L of each one. For it three sequencing batch reactors (SBR) were operated. SBR-B treated a synthetic wastewater (SWW) without target drugs and SBR-PhC and SBR-PhC + AC operated with SWW doped with the three drugs, adding into SBR-PhC + AC 1.5 g L of a mesoporous granular activated carbon. Results showed that the hybrid system SBR-activated carbon produced an effluent free of PhCs, which in addition had higher quality than that achieved in a conventional activated sludge treatment in terms of lower COD, turbidity and SMP concentrations. On the other hand, five possible routes of removal for target drugs during the biological treatment were studied. Hydrolysis, oxidation and volatilization pathways were negligible after 6 h of reaction time. Adsorption route only was significant for ACT, which was adsorbed completely after 5 h of reaction, while only 1.9% of CAF and 5.6% of IBU were adsorbed. IBU was the least biodegradable compound.
如今，由于人们对水中药物化合物（PhCs）的存在日益关注，应该研究传统废水处理的替代方案。在这项工作中，提出了一种包括活性污泥生物处理和活性炭吸附的组合系统，以去除浓度为 2mg/L 的三种选定药物（对乙酰氨基酚（ACT）、咖啡因（CAF）和布洛芬（IBU））。为此，运行了三个序批式反应器（SBR）。SBR-B 处理不含目标药物的合成废水（SWW），而 SBR-PhC 和 SBR-PhC+AC 则用含有这三种药物的 SWW 进行处理，并向 SBR-PhC+AC 中添加 1.5g/L 的中孔颗粒状活性炭。结果表明，混合系统 SBR-活性炭产生的废水不含 PhCs，而且与传统的活性污泥处理相比，其 COD、浊度和 SMP 浓度更低，水质更好。另一方面，研究了生物处理过程中目标药物的五种可能去除途径。在 6 小时的反应时间后，水解、氧化和挥发途径可以忽略不计。只有吸附途径对 ACT 有显著作用，ACT 在 5 小时的反应后被完全吸附，而 CAF 只有 1.9%和 IBU 只有 5.6%被吸附。IBU 是最难生物降解的化合物。
