唐山市畜禽粪便产沼气发电生命周期评价

Life cycle assessment of biogas power generation from livestock and poultry manure in Tangshan City

为探究唐山市某畜禽粪便厌氧发酵沼气项目的减排潜力,通过项目案例的实际生产数据,运用生命周期评价方法分析唐山市某畜禽粪便产沼气发电项目和传统火力发电项目不同阶段的环境影响表现。结果表明:火力发电各阶段的污染物排放差异较大,主要集中在燃煤发电阶段;沼气发电各阶段污染物排放量除SO_(2)、CO_(2)、CH_(4)外无明显差异。沼气发电全生命周期过程的环境表现均优于火力发电,具有更高的减排能力,其中沼气发电加权后的环境酸化潜势比火力发电低96.64%,其次分别是人体毒性潜势(77.32%)、全球变暖潜势(67.78%)和富营养化潜势(5.71%)。

In order to explore the emission reduction potential of a livestock and poultry manure anaerobic fermentation biogas project in Tangshan City, through the actual production data of the case project, the life cycle assessment method was used to analyze the environmental impact performance of a livestock and poultry manure biogas power generation project and traditional thermal power generation project in different stages in Tangshan City. The results show that the pollutant emissions of thermal power generation vary greatly in each stage, mainly in coal-fired power generation stage,and there is no significant difference at each stage in biogas power generation except for SO_(2)、CO_(2)and CH_(4). The environmental performance of biogas power generation in the whole life cycle process is better than thermal power generation, with higher emission reduction capacity. The weighted environmental acidification potential of biogas power generation is lower than that of thermal power generation by 96.64%, followed by human toxicity potential(77.32%),global warming potential(67.78%) and eutrophication potential(5.71%).