An in-situ electro-Fenton system with double anodes and Pd/CeO2 catalyst, which is powered by photovoltaic energy, is constructed. As the process only needs to replace the catalyst and iron anode regularly, and H2O2 and Fe2+ are in-situ generated and continuously added, it not only greatly reduces labor intensity and safety risks but also saves reagents and run cost. In this paper, the process is used to remove sulfadiazine (SDZ), one of the sulfonamides, from the simulated livestock and poultry breeding wastewater containing antibiotics. The r...