1. Centre for Bioengineering and Biotechnology, China University of Petroleum, Qingdao 266580, China
2. College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
3. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
4. School of Materials Science and Engineering, China University of Petroleum, Qingdao, 266580, China