Moving Bed Sequenced Batch Reactor System in Tetracycline Antibiotic Removal from Real Hospital Wastewater

Background: Water contamination by synthetic organic chemicals like antibiotics is a major environmental issue. Tetracycline (TC), an antibiotic in a wide family, is notable. A moving bed sequenced batch reactor (MBSBR) is tested for treating hospital raw wastewater containing TC.Methods: A ۳۵-L pilot system was constructed, with ۳۰ L usable. PVC suspended carriers (Kaldnes K۳) with ۵۸۴.۳ m۲/m۳ specific surface area made about ۷۰% of the functional volume. The independent variables in this study were hydraulic retention duration (۱, ۱.۵, ۲, and ۲.۵ hours) and starting TC concentration (۵, ۱۰, and ۱۵ mg/L).Results: The findings of the study demonstrated satisfactory performance under the conditions of an initial TC concentration of ۵ mg/L and an organic load of ۳۵۰ mg/L. The overall removal efficiencies for TC, chemical oxygen demand (COD), and biological oxygen demand (BOD۵) were ۷۲.۸%, ۸۳%, and ۹۳.۹%, respectively. The optimal performance of the system was primarily observed during the initial phase, characterized by a TC concentration of ۵ mg/L and a hydraulic retention time (HRT) of ۲.۵ hours. The experimental results also indicated that the maximum removal efficiency was ۱.۸ kg COD/m۲.day, as determined by a fitted surface loading rate (SLR). Furthermore, the food-tomicroorganism (F/M) ratio decreased from ۰.۱۰۱ to ۰.۰۳۸ as the HRT increased from ۱ to ۲.۵ hours.Conclusion: The results of the study indicate that the MBSBR exhibits a high level of efficiency in removing TC from hospital wastewater.

کلیدواژه ها:

Moving Bed Sequenced Batch Reactor ، hospital wastewater ، Tetracycline