Biodegradation of Emerging Pharmaceuticals from Domestic Wastewater by Membrane Bioreactor: The Effect of Solid Retention Time

摘要: Although conventional biological treatment plants can remove basic pollutants, they are ineffective at removing recalcitrant pollutants. Membrane bioreactors contain promising technology and have the advantages of better effluent quality lower sludge production compared to those processes. In this study, removal pharmaceutical compounds by membrane under different solid retention times (SRTs) was investigated. To study effect SRT on emerging pharmaceuticals, levels pharmaceuticals were measured over 96 days for following times: 20, 30, 40-day SRT. It found that had optimum performance in terms pharmaceuticals' elimination. The efficiencies chemical oxygen demand (COD) each selected higher than 96% steady-state conditions. highest degradation efficiency observed paracetamol. Paracetamol most removed compound followed ranitidine, atenolol, bezafibrate, diclofenac, carbamazepine. microbial community phylum level also analyzed understand biodegradability pharmaceuticals. noticed Proteobacteria increased from 46.8% 60.0% after with Actinobacteria class, which metabolize paracetamol, carbamazepine, 9.1% 17.9% adding by-products carbamazepine samples.