1. 1 State Key Laboratory of Bioreactor Engineering School of Biotechnology East China University of Science and Technology Shanghai 200237 P. R. China
2. College of Food Science and Engineering Ocean University of China Qingdao 266003 P. R. China
3. National Engineering Research Center for Biotechnology Nanjing Tech University NO.30 Puzhu Road(S) Nanjing JS 211816 P. R. China
4. Department of Bioproducts and Biosystems Engineering University of Minnesota St. Paul MN 55108 USA