Effects of sludge properties in a combined process of mesophilic anaerobic digestion and thermophilic aerobic digestionZehua Zhao, Yuanshun Xu, Tianfeng Wang, Xiaowei Xu, Houhu Zhang and Jing HuaE3S Web Conf., 194 (2020) 04015DOI: https://doi.org/10.1051/e3sconf/202019404015