Co-hydrothermal carbonization of sewage sludge and rice straw to improve hydrochar quality: Effects of mixing ratio and hydrothermal temperature - Xiaoguang Liu; Ling Peng; Peiyue Deng; Yaman Xu; Peisheng Wang; Qingtong Tan; Chiqian Zhang; Xiaohu Dai (Bioresource Technology, 2025)