1. Department of Biological Systems Engineering, Washington State University, Richland, Washington 99354-1671, United States
2. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400030, China
3. Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Avenue, St. Paul, Minnesota 55108, United States