title: Mass flow and energy balance plus economic analysis of a full-scale biogas plant in the rice-wine-pig system.
abstract: This paper presents mass flow and energy balance as well as an economic analysis for a biogas plant in a rice-wine-pig system at a practical rather than laboratory scale. Results showed feeding amount was 65.30 t d(-1) (total solid matter (TSM) 1.3%) for the normal temperature continuous stirred tank reactor (CSTR), and 16.20 t d(-1) (TSM 8.4%) for the mesophilic CSTR. The digestion produced 80.50 t d(-1) of mass, with 76.41 t d(-1) flowing into rice fields and 4.49 t d(-1) into composting. Energy consumption of this plant fluctuated with seasons, and surplus energy was 823, 221 kWh/year. Thus, biogas plant was critical for material recycling and energy transformation of this agro-ecosystem. The economic analysis showed that the payback time of the plant was 10.9 years. It also revealed application of biogas as a conventional energy replacement would be attractive for a crop-wine-livestock ecosystem with anaerobic digestion of manure.
authors.affiliation: Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China.
authors.forename: Jiang
authors.initials: J
authors.lastname: Li
authors.affiliation: Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China.
authors.forename: Chuixue
authors.initials: C
authors.lastname: Kong
authors.affiliation: Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China.
authors.forename: Qiwu
authors.initials: Q
authors.lastname: Duan
authors.affiliation: Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Luo
authors.affiliation: Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China.
authors.forename: Zili
authors.initials: Z
authors.lastname: Mei
authors.affiliation: Biogas Institute of Ministry of Agriculture, Chengdu 610041, China; Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture, Chengdu 610041, China. Electronic address: biomagongcheng2015@hotmail.com.
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Lei
mesh_terms: D000693:Anaerobiosis / Q000502:physiology; D000818:Animals; D056804:Biofuels / Q000032:analysis*; D019149:Bioreactors; D018556:Crops, Agricultural / Q000033:anatomy & histology*; D017753:Ecosystem; D004734:Energy Metabolism / Q000502:physiology; D058751:Livestock / Q000033:anatomy & histology*; D008372:Manure / Q000032:analysis*; D012275:Oryza / Q000737:chemistry*; D013552:Swine; D014920:Wine / Q000032:analysis*
chemical_list: D056804:Biofuels; D008372:Manure
keywords: Economic analysis; Energy balance; Full-scale biogas plant; Mass flow