关键词: 系统集成, 生物甲烷, 生物质, 技术评价, 节能减排

Abstract: Biomethane route/system is one of the most important ways of reasonablely utilizing biomass，reducing emissions of carbon dioxide and other pollutants. There is not an insight analysis focusing on the material and energy conversion，economic and environment issues of the system. In order to have an insight understanding of biomethane system，this paper reviews the related units and sub-systems which affect the system from the viewpoint of process system engineering，including feedstock fermentation，biogas upgrading and product transportation，and makes analysis and evaluation. Research progress of evaluation of the effects of biomethane process on technology，economy and environment and multi-objective optimization in China and the rest of the world is presented，and technical bottlenecks and challenges of research on biomethane system are discussed. Aimed at the specialties of resources，a system integration method comprehensively considering process simulation，energy efficiency analysis，whole life cycle，and economic evaluation is required to evaluate and analyze material conversion，energy efficiency，and environmental impact in digestion of biomethane，product separation，storage，and transportation to find out the bottleneck of sustainable performance，and further to make multi-objective optimization of technology，economy and environment to achieve optimized utilization of biomethane and optimized allocation of energy resources.

Key words: system integration, biomethane, biomass, analysis and evaluation, emission reduction