The combined effects of hydrothermal treatment and Na2S2O8/ CuFe2O4 magnetic oxidation on sludge dewaterability improvementYonghao Chen, Dandan Chen, Yuhao Dou, Min Song and Feirong PengE3S Web Conf., 194 (2020) 04023DOI: https://doi.org/10.1051/e3sconf/202019404023