1. College of Engineering, Shenyang Agricultural University, Shenyang, 110866, China
2. Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, 610041, Chengdu, China
3. Key Laboratory of Technology and Model for Cyclic Utilization from Agricultural Resources, Rural Energy and Environment Agency, Ministry of Agriculture and Rural Affairs, 100125, Beijing, China