Optimization of Cephalosporin C Acylase Immobilization Shuangming Tong, Linlin Zhu, Xiaona Wang, Xi LI, Yanhong Chang and Hui Luo E3S Web Conf., 78 (2019) 02003 Published online: 15 January 2019 DOI: 10.1051/e3sconf/20197802003