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规模养猪场粪便堆肥处理生命周期评价实例分析

DOI: 10.11654/jaes.2014.11.026, PP. 2254-2259

Keywords: 堆肥,生命周期评价,环境影响,粪便,规模化猪场

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Abstract:

以北京郊区某规模化养猪场现有堆肥系统为例,运用生命周期评价方法,以养猪场现行堆肥工艺为参比,以4种不同翻堆频率条件下的条垛式堆肥工艺作为备选方案,对该养猪场粪便不同堆肥处理情景的环境影响进行系统对比分析。结果表明,每处理1t新鲜猪粪的化石能源损耗潜力为80.8~221.5MJ;堆肥氨挥发排放对系统总酸化效应和富营养化效应贡献率均达96%以上;CO2和N2O等温室气体排放对总温室效应的贡献分别为58%~88%和8%~35%。能源投入和气体排放是猪粪堆肥生命周期环境影响的关键因素,实践生产中应注重使用清洁能源,并结合工艺特点采用氨挥发与温室气体减排技术,减少堆肥生产过程的环境污染。

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