以畜禽粪便为原料的生物天然气能源潜力和碳强度分析

Energy Potentials and Carbon Intensity for Bio-natural Gas from Livestock Manure in China

以畜禽粪便为原料的生物天然气有显著的资源和环境效益。针对其能源潜力和碳强度在省级地区尺度上的差异问题,提出生命周期碳排放核算模型,分析以畜禽粪便为原料的生物天然气的时空分布特征。结果表明,随着畜牧业规模的扩大和集约化,以畜禽粪便为原料的生物天然气潜力越来越大,各省之间的能源潜力存在较大的差异。以畜禽粪便为原料的生物天然气的年碳减排潜力达到12.5亿t。能源潜力、空间特征和碳强度的量化方法为区域畜禽粪便资源化利用管理提供支持。

Bio-natural gas(BNG)from livestock manure is a potential alternative energy source that can yield significant resource and environmental benefits.Energy potentials and carbon intensity differences in livestock manure utilization may exist in provincial areas.The spatial and temporal distribution characteristics for the BNG potentials are analyzed.A life-cycle carbon emission accounting model for carbon intensity was proposed.The results show that the scale and intensification of livestock increases with it BNG potential.The BNG potentials vary greatly among provinces.The annual carbon emission reduction potential of BNG from livestock manure reached 1.25 billion tons.The proposed energy potential,spatial characteristics,and carbon intensity measurement are expected to provide better support for enhancing specific regional plans for livestock manure utilization.