Chao HeChao He is Associate Professor and deputy director of the Department of Energy and Environmental Engineering in the College of Mechanical and Electrical Engineering at Henan Agricultural University, China. He has been engaged in teaching and researchwork in the scientific field of biogas and biomass energy for a long time, has implemented 1 project from National Natural Science Foundation of China and 3 Henan science and technology projects of China. He has also published more than 40 papers in his field. Read More Read Less