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DOI10.1021/acs.energyfuels.8b00823
Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply-Demand Evaluation and Life Cycle Assessment
Salih, Hafiz1; Patterson, Craig2; Li, Jiaxing1; Mock, Justin1; Dastgheib, Seyed A.1
发表日期2018-06-01
ISSN0887-0624
卷号32期号:6页码:6627-6633
英文摘要

The feasibility of lime-softening sludge utilization for flue gas desulfurization in coal-fired power plants was evaluated through a supply demand analysis and a life cycle assessment (LCA). To evaluate the demand and supply of lime sludge to replace limestone on a national scale, the annual amount of lime sludge generated by water treatment utilities in the United States was estimated and compared with the annual amount of limestone used by coal-fired power utilities. To evaluate the environmental sustainability of reusing lime sludge in power plants, an LCA study was performed in which the environmental impact and water footprint of the proposed approach were quantified, and these results were compared with the conventional approaches for limestone mining, grinding, and transportation to power plants and lime sludge disposal in landfills. Water utilities across the United States are currently generating approximately 3.2 million tons of lime sludge per year at an estimated disposal cost of approximately US$90 million, whereas power utilities are using approximately 6.3 million tons of limestone per year. The potential savings that would result from partial replacement of limestone with lime sludge was estimated to be approximately US $97 million per year. The LCA study showed that the environmental impact of lime sludge utilization in power plants under different scenarios was 2 orders of magnitude lower than that of the landfill disposal option. Furthermore, the water footprint for lime sludge reuse in power plants was almost negligible compared with that of the conventional approaches of disposing of lime sludge at water utilities or using limestone at power utilities.


语种英语
WOS记录号WOS:000436381000022
来源期刊ENERGY & FUELS
来源机构美国环保署
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/58026
作者单位1.Univ Illinois, Prairie Res Inst, Illinois State Geol Survey, 615 E Peabody Dr, Champaign, IL 61820 USA;
2.US EPA, Natl Risk Management Res Lab, Cincinnati, OH 45268 USA
推荐引用方式
GB/T 7714
Salih, Hafiz,Patterson, Craig,Li, Jiaxing,et al. Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply-Demand Evaluation and Life Cycle Assessment[J]. 美国环保署,2018,32(6):6627-6633.
APA Salih, Hafiz,Patterson, Craig,Li, Jiaxing,Mock, Justin,&Dastgheib, Seyed A..(2018).Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply-Demand Evaluation and Life Cycle Assessment.ENERGY & FUELS,32(6),6627-6633.
MLA Salih, Hafiz,et al."Utilization of Water Utility Lime Sludge for Flue Gas Desulfurization in Coal-Fired Power Plants: Part I. Supply-Demand Evaluation and Life Cycle Assessment".ENERGY & FUELS 32.6(2018):6627-6633.
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