1. Department of Chemical and Biomolecular Engineering The University of Akron Akron OH 44325 USA
2. Department of Biochemical Engineering and Key Laboratory of Systems Bioengineering of the Ministry of Education, School of Chemical Engineering and Technology Tianjin University Tianjin 300072 P. R. China
3. State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University Shanghai 200092 P. R. China
4. College of Chemical and Biological Engineering Zhejiang University Hangzhou Zhejiang 310027 P. R. China