Fluidized bed combustion of poultry litter at farm-scale: Environmental impacts using a life cycle approach

JOURNAL OF CLEANER PRODUCTION

卷:276

Article

Choudhury, Abhinav^1,3  Felton, Gary¹  Moyle, Jonathan²  Lansing, Stephanie¹ 

[1] Univ Maryland, Energy Res Ctr, Dept Environm Sci & Technol, 1429 Anim Sci,Ag Engn Bldg, College Pk, MD 20742 USA

[2] Univ Maryland, Lower Eastern Shore Res & Educ Ctr LESREC, 27664 Nanticoke Rd, Salisbury, MD 21801 USA

[3] Conservat Fund Freshwater Inst, 1098 Turner Rd, Shepherdstown, WV 25443 USA

关键词: Waste-to-energy;    Assessment;    Environmental impact;    Emissions;    Sustainability;    LCA;   

DOI  :  10.1016/j.jclepro.2020.124231

来源: Elsevier

【 摘 要 】

Combustion can concentrate phosphorus (P) from poultry litter into an ash product that is easier to transport for land application. This was the first life cycle assessment (LCA) study to investigate the efficacy and sustainability of a fluidized bed combustion (FBC) system using poultry litter to heat poultry houses and produce electricity, in the United States, to replace liquid propane gas (LPG) and natural gas (NG) use. The 'Baseline scenario' used results from a 16-month FBC monitoring study, and an 'Improved scenario' based on an increased biomass feed rate (0.246 tons/h), increased run-time (6720 h/y), and net positive electricity production. In the Baseline scenario, climate change potential was 32% and 44% lower than use of LPG and NG, respectively, for poultry house heating, but the low electricity production from the FBC system resulted in net electricity import and lower sustainability compared to LPG use in 12 of the 18 impact categories. The Improved scenario had 48-98% less environmental impacts than the Baseline scenario in the 18 categories. The sensitivity analysis showed that a 10% change in the electricity input for FBC operation resulted in the highest average change (4.8%) in the 18 impact categories, indicating the necessity of a net positive electrical energy output from the FBC unit for increased sustainability. The results also highlighted the impact of the replacement heating fuel type, as replacing NG through poultry litter combustion had a greater impact than replacement of LPG. (C) 2020 The Authors. Published by Elsevier Ltd.

【 授权许可】

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