Inventory analysis for a household biogas system

摘要

This paper proposes an inventory analysis for the household biogas system in Gongcheng, China. The results show that (1) Biogas-linked agro-ecosystem has a longer utilization chain for agricultural wastes, which takes in nonrenewable resources and outputs renewable resources. Therefore, household biogas system is an effective measure in relieving energy shortage, reducing environmental pollution and realizing the sustainable agriculture in the rural areas. (2) The efficiency of the household biogas system is at a low level, and still needs to be promoted. In order to increase the energy conversion efficiency and energy use ratio, more attempts should be dedicated to the technological advancement of biogas fermentation and multipurpose utilization. (3) The proposed method may help us understand the household biogas system more clearly and directly in energy conversion and utilization mode based on energy metrics. It is convenient to find out the weak points of the agro-ecosystem that waste more energy and seek for optimal solutions accordingly.