Department of Civil and Industrial Engineering, University of Pisa, Pisa, Italy.
Department of Civil and Industrial Engineering, University of Pisa, Pisa, Italy.
Bioresour Technol. 2019 Feb;273:468-477. doi: 10.1016/j.biortech.2018.11.038. Epub 2018 Nov 10.
Gasification of Short Rotation Forestry (SRF) poplar wood chips and anaerobic digestion of the microalga Chlorella vulgaris have been analyzed as alternative supply chains for the production of biomethane. Life Cycle Assessment (LCA) was performed from the biomass cultivation to the upgrading stages. Process simulation of gasification and upgrading was carried out, environmental impacts of the entire supply chains have been estimated and discussed. The highest CO removal has been reached by absorption on monoethanolamine. Electricity requirements heavily affect the SRF chain, while productions of carbon dioxide and fertilizers are the main sources of impact of the microalgae cultivation. The recycle of non-absorbed fertilizers, as well as integration of microalgae digestion in wastewater plants, are recommended. Capture and re-injection of the CO lost during the upgrading stages would result, simultaneously, in an 8.53% reduction of the atmospheric emission, and in a minor demand to promote algal growth.
对短轮伐期杨树木屑的气化和小球藻的厌氧消化已被分析为生物甲烷生产的替代供应链。从生物质培养到升级阶段进行了生命周期评估（LCA）。进行了气化和升级过程模拟，估算并讨论了整个供应链的环境影响。通过单乙醇胺吸收实现了最高的 CO 去除率。电力需求严重影响 SRF 链，而二氧化碳和肥料的生产是微藻培养的主要影响源。建议回收未吸收的肥料，并将微藻消化集成到废水厂中。在升级阶段捕获和再注入失去的 CO ，同时将大气排放量减少 8.53%，并减少促进藻类生长的需求。
