Antibiotics in Digested Slurry Treated with Anaerobic Lagoon and Advanced Treatment: Occurrence and Ecological Risk Assessment

Antibiotics as emerging contaminants have received much attention in recent years. Anaerobic digestion of animal manure contained antibiotics serves as an important reservoir of antibiotics in intensive farms. However, it is still lack of research report on antibiotics in duck farms in China, especially treated by anaerobic lagoon (CAL) process. This study analyzed residual concentrations of 15 common veterinary antibiotics in digested slurry (DS) collected from CAL and advanced treatments in an intensive duck farm in Jiangsu Province, China. The CAL treatment could effectively remove the target antibiotics, and the removal rates of tetracyclines (TCs), sulfonamides (SAs), and quinolones (QLs) ranged 93.8–100