Department of Bioscience, Aarhus University, 8000, Aarhus C, Denmark.
Department of Environmental Science, Aarhus University, Frederiksborgsvej 399, 4000, Roskilde, Denmark; WATEC, Aarhus University Centre for Water Technology, Ny Munkegade 120, 8000, Aarhus C, Denmark.
Chemosphere. 2019 Dec;236:124303. doi: 10.1016/j.chemosphere.2019.07.034. Epub 2019 Jul 5.
Biofilm reactors are a promising biotechnology to eliminate pharmaceuticals from wastewater during tertiary treatment or in water works for drinking water production. This study aimed at investigating the effects of pulsed carbon feeding for promoting the co-degradation of indigenous pharmaceuticals from pre-treated wastewater in a fixed-bed porous biofilm reactor (slow sand filter). The addition of acetate (carbon source) resulted in three different enhancement/limitation effects, which were compound dependent: 1) atenolol and iohexol experienced enhanced co-degradation followed by constant (acetate independent) degradation; 2) metoprolol, iomeprol, diclofenac, propranolol and sulfamethizole co-degradation dependent on aerobic turnover, but inhibited at higher acetate concentrations (60-300 mg C/L); 3) sulfadiazine, sulfamethoxazole and trimethoprim were removed independently of oxygen and acetate concentration. Carbamazepine, ditriazoic acid, iopromide; tramadol and venlavaxine were not removed at any acetate dosage. Biofilm reactors can be employed for polishing treated wastewater, and the addition of a primary carbon source can enhance the performance of the bioreactor.
生物膜反应器是一种有前途的生物技术，可在三级处理中或在饮用水生产的水厂中消除废水中的药物。本研究旨在调查脉冲碳进料对固定床多孔生物膜反应器（慢砂滤池）中预处理废水中土著药物共降解的促进作用。添加乙酸盐（碳源）会产生三种不同的增强/限制作用，这取决于化合物：1）阿替洛尔和碘海醇经历增强的共降解，然后是恒定（与乙酸盐无关）的降解；2）美托洛尔、碘普罗胺、双氯芬酸、普萘洛尔和磺胺嘧啶的共降解取决于需氧转化，但在较高的乙酸盐浓度（60-300mgC/L）下受到抑制；3）磺胺嘧啶、磺胺甲恶唑和甲氧苄啶独立于氧气和乙酸盐浓度而被去除。卡马西平、三氮唑酸、碘普胺、曲马多和文拉法辛在任何乙酸盐剂量下都不会被去除。生物膜反应器可用于处理后的废水抛光，添加主要碳源可以提高生物反应器的性能。
