[1] Minist Agr & Rural Affairs, Biogas Inst, Key Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Sichuan, Peoples R China
[2] Chinese Acad Agr Sci, Res Ctr Rural Energy & Ecol, Chengdu 610041, Sichuan, Peoples R China
[3] Chinese Acad Agr Sci, Agroenvironm Protect Inst, 31 Fukang Rd, Tianjin 300191, Peoples R China
[4] Jiangsu Univ, Sch Energy & Power Engn, Zhenjiang 212013, Peoples R China
[5] Sanya Univ, Zhai Mingguo Academician Work Stn, Sanya 572022, Peoples R China
[6] Suzhou Univ Sci & Technol, Sch Environm Sci & Engn, Suzhou 215009, Peoples R China