Life cycle assessment of two emerging sewage sludge-to-energy systems: evaluating energy and greenhouse gas emissions implications.
Life cycle assessment of two emerging sewage sludge-to-energy systems: evaluating energy and greenhouse gas emissions implications.
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DOI：
10.1016/j.biortech.2012.09.135
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发表时间：
2013
影响因子：
11.4
通讯作者：
Yucheng Cao;A. Pawłowski
中科院分区：
文献类型：
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作者：
Yucheng Cao;A. Pawłowski
一个“摇篮到坟墓”的生命周期评估进行了检查的能源和温室气体（GHG）排放的足迹两个新兴的污泥能源系统。一个系统采用厌氧消化（AD）和快速热解的生物能源转化的组合，而另一个不包括AD。每个系统分为五个过程阶段：工厂建设，污泥预处理，污泥转化为生物能源，生物能源利用和生物炭管理。两种系统都实现了能源和温室气体排放效益，并且涉及AD的系统比不包括AD的系统表现得更好（净能量增益为5.30对0.63GJ/t污泥，排放信用为0.63对0.47t CO2 eq/t污泥）。进行了详细的贡献和敏感性分析，以确定不同生命周期阶段如何以及在多大程度上对能源和排放影响负责。生物质能源生产、污泥干化所需能量以及生物质能源最终用途的变化显著影响了系统的能量和排放性能。
A “cradle-to-grave” life cycle assessment was conducted to examine the energy and greenhouse gas (GHG) emission footprints of two emerging sludge-to-energy systems. One system employs a combination of anaerobic digestion (AD) and fast pyrolysis for bioenergy conversion, while the other excludes AD. Each system was divided into five process phases: plant construction, sludge pretreatment, sludge-to-bioenergy conversion, bioenergy utilizations and biochar management. Both systems achieved energy and GHG emission benefits, and the AD-involving system performed better than the AD-excluding system (5.30 vs. 0.63GJ/t sludge in net energy gain and 0.63 vs. 0.47t CO2eq/t sludge in emission credit for base case). Detailed contribution and sensitivity analyses were conducted to identify how and to what degree the different life-cycle phases are responsible for the energy and emission impacts. The energy and emission performances were significantly affected by variations in bioenergy production, energy requirement for sludge drying and end use of bioenergy.