Comparative environmental and economic life cycle assessment of high solids anaerobic co-digestion for biosolids and organic waste management

WATER RESEARCH

卷:171

Article

Lee, Eunyoung¹  Oliveira, Deborah Stolte Bezerra Lisboa²  Oliveira, Luiza Stolte Bezerra Lisboa²  Jimenez, Eduardo^1,3  Kim, Youngwoon¹  Wang, Meng^1,4  Ergas, Sarina J.¹  Zhang, Qiong¹ 

[1] Univ S Florida, Dept Civil & Environm Engn, 4202 E Fowler Ave,ENG 030, Tampa, FL 33620 USA

[2] Univ S Florida, Dept Chem & Biomed Engn, 4202 E Fowler Ave,ENB 118, Tampa, FL 33620 USA

[3] Kimley Horn & Associates INC, 655 N Franklin St 150, Tampa, FL 33602 USA

[4] Penn State Univ, Dept Energy & Mineral Engn, 113 Hosier Bldg, State Coll, PA 16802 USA

关键词: Life cycle assessment;    Life cycle cost analysis;    Biosolids;    Organic fraction of municipal solid waste;    High solids anaerobic co-digestion;   

DOI  :  10.1016/j.watres.2019.115443

来源: Elsevier

【 摘 要 】

High-Solids Anaerobic co-Digestion (HS-AcD) of sewage sludge (biosolids) with the organic fraction of municipal solid waste is a promising waste management alternative due to high methane yields, lower reactor volume requirements, lower energy inputs, and less leachate production than liquid anaerobic digestion. This study evaluated the environmental and economic burdens and benefits of HS-AcD of biosolids, Food Waste (FW), and Yard Waste (YW) using Life Cycle Assessment (LCA) and Life Cycle Cost Analysis (LCCA) methods using Hillsborough County, Florida in the U.S. as a case study. Results for HS-AcD were compared with incineration, composting, and landfilling, with and without landfill gas use. The results showed that HS-AcD of a mixture of biosolids, FW, and YW had the lowest environmental impacts in all categories analyzed (global warming potential, acidification, eutrophication, and ecotoxicity). In terms of economics, HS-AcD had the lowest life cycle cost, with or without considering land acquisition. The results show that HS-AcD is the best choice to manage biosolids and the organic waste in Hillsborough County in terms of both environmental and economic sustainability. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free