Study on mutagenesis of high protease producing thermophilic bacteria by UV-DES and hydrolysis of excess sludgeChangwei Wang, Zhifang Ning, Weizhang Zhong, Yanfei Li, Jiwei Hou, Zhaoyang Wang, Haoran Zhang and Xilei DongE3S Web Conf., 466 (2023) 01013DOI: https://doi.org/10.1051/e3sconf/202346601013