1. Key Laboratory of Development and Application of Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu, People’s Republic of China
2. Department of Biological and Chemical Engineering, Aarhus University, Aarhus N, Denmark
3. Danish Technological Institute, Aarhus N, Denmark
4. UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
5. Agri-Environment Branch, Agri-Food and Biosciences Institute, Belfast, Northern Ireland, UK
6. Chemical and Environmental Science, University of Limerick, Limerick, Ireland