Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados
Pelagic Sargassum inundation of coastlines across the North Atlantic is an ongoing challenge but presents new opportunities for value-added resource recovery. This study assessed the techno-economic feasibility and environmental impact of utilising these invasive brown seaweed, and food waste as fee...
Published in: | Energy Conversion and Management |
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2021
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ftdtupubl:oai:pure.atira.dk:publications/928da81a-6922-494c-a6a2-f356796a3d1d 2024-09-15T18:24:17+00:00 Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados Thompson, Terrell M. Ramin, Pedram Udugama, Isuru Young, Brent R. Gernaey, Krist V. Baroutian, Saeid 2021 application/pdf https://orbit.dtu.dk/en/publications/928da81a-6922-494c-a6a2-f356796a3d1d https://doi.org/10.1016/j.enconman.2021.114605 https://backend.orbit.dtu.dk/ws/files/265861722/Thompson_et_al.pdf eng eng https://orbit.dtu.dk/en/publications/928da81a-6922-494c-a6a2-f356796a3d1d info:eu-repo/semantics/openAccess Thompson , T M , Ramin , P , Udugama , I , Young , B R , Gernaey , K V & Baroutian , S 2021 , ' Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum : A biorefinery concept for Barbados ' , Energy Conversion and Management , vol. 245 , 114605 . https://doi.org/10.1016/j.enconman.2021.114605 Anaerobic digestion Environmental impact analysis Food waste Hydrothermal pretreatment Pelagic Sargassum Techno-economic assessment /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger article 2021 ftdtupubl https://doi.org/10.1016/j.enconman.2021.114605 2024-08-13T00:03:06Z Pelagic Sargassum inundation of coastlines across the North Atlantic is an ongoing challenge but presents new opportunities for value-added resource recovery. This study assessed the techno-economic feasibility and environmental impact of utilising these invasive brown seaweed, and food waste as feedstock for energy production and fertiliser recovery in Barbados. The biorefinery concept evaluated was designed with hydrothermal pretreatment (HTP) and anaerobic digestion (AD) technologies. Financial analyses of four varied feedstock and process scenarios (S1-S4) established a linear relationship between profitability and the sale of products (electricity and fertiliser). In all cases, simple sale of power generated to the national grid resulted in a negative cash flow and required the introduction of fertiliser sales to achieve positive cash flows. Moreover, the net loss in the electricity only scenarios exceeded that of the landfill disposal, the present operation employed on the island for Sargassum management. The addition of the solid digestate to the revenue stream increased the profit margin and financial attractiveness of the process. Maximum income generation could be attained through 100% supply of the digestate to international markets. However, this approach provides zero support to local food security. The preferred option involves the 50/50 split utilisation of the solid digestate in local and international agricultural practice. While HTP is energy-intensive technology, the recirculation of waste heat generated by a combined heat and power unit for HTP reduced the input energy demand. It also lowered the potential environmental impact by more than 10-fold, relative to landfill disposal. Recycling of the liquid digestate also reduced the fresh water demand and its associated costs. Despite the promising results, process scale-up and commercialisation remain a main challenge, primarily due to the seasonality and variability of Sargassum seaweed for continuous bioprocessing. Article in Journal/Newspaper North Atlantic Technical University of Denmark: DTU Orbit Energy Conversion and Management 245 114605 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Anaerobic digestion Environmental impact analysis Food waste Hydrothermal pretreatment Pelagic Sargassum Techno-economic assessment /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger |
spellingShingle |
Anaerobic digestion Environmental impact analysis Food waste Hydrothermal pretreatment Pelagic Sargassum Techno-economic assessment /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger Thompson, Terrell M. Ramin, Pedram Udugama, Isuru Young, Brent R. Gernaey, Krist V. Baroutian, Saeid Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados |
topic_facet |
Anaerobic digestion Environmental impact analysis Food waste Hydrothermal pretreatment Pelagic Sargassum Techno-economic assessment /dk/atira/pure/sustainabledevelopmentgoals/zero_hunger name=SDG 2 - Zero Hunger |
description |
Pelagic Sargassum inundation of coastlines across the North Atlantic is an ongoing challenge but presents new opportunities for value-added resource recovery. This study assessed the techno-economic feasibility and environmental impact of utilising these invasive brown seaweed, and food waste as feedstock for energy production and fertiliser recovery in Barbados. The biorefinery concept evaluated was designed with hydrothermal pretreatment (HTP) and anaerobic digestion (AD) technologies. Financial analyses of four varied feedstock and process scenarios (S1-S4) established a linear relationship between profitability and the sale of products (electricity and fertiliser). In all cases, simple sale of power generated to the national grid resulted in a negative cash flow and required the introduction of fertiliser sales to achieve positive cash flows. Moreover, the net loss in the electricity only scenarios exceeded that of the landfill disposal, the present operation employed on the island for Sargassum management. The addition of the solid digestate to the revenue stream increased the profit margin and financial attractiveness of the process. Maximum income generation could be attained through 100% supply of the digestate to international markets. However, this approach provides zero support to local food security. The preferred option involves the 50/50 split utilisation of the solid digestate in local and international agricultural practice. While HTP is energy-intensive technology, the recirculation of waste heat generated by a combined heat and power unit for HTP reduced the input energy demand. It also lowered the potential environmental impact by more than 10-fold, relative to landfill disposal. Recycling of the liquid digestate also reduced the fresh water demand and its associated costs. Despite the promising results, process scale-up and commercialisation remain a main challenge, primarily due to the seasonality and variability of Sargassum seaweed for continuous bioprocessing. |
format |
Article in Journal/Newspaper |
author |
Thompson, Terrell M. Ramin, Pedram Udugama, Isuru Young, Brent R. Gernaey, Krist V. Baroutian, Saeid |
author_facet |
Thompson, Terrell M. Ramin, Pedram Udugama, Isuru Young, Brent R. Gernaey, Krist V. Baroutian, Saeid |
author_sort |
Thompson, Terrell M. |
title |
Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados |
title_short |
Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados |
title_full |
Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados |
title_fullStr |
Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados |
title_full_unstemmed |
Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum :A biorefinery concept for Barbados |
title_sort |
techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic sargassum :a biorefinery concept for barbados |
publishDate |
2021 |
url |
https://orbit.dtu.dk/en/publications/928da81a-6922-494c-a6a2-f356796a3d1d https://doi.org/10.1016/j.enconman.2021.114605 https://backend.orbit.dtu.dk/ws/files/265861722/Thompson_et_al.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Thompson , T M , Ramin , P , Udugama , I , Young , B R , Gernaey , K V & Baroutian , S 2021 , ' Techno-economic and environmental impact assessment of biogas production and fertiliser recovery from pelagic Sargassum : A biorefinery concept for Barbados ' , Energy Conversion and Management , vol. 245 , 114605 . https://doi.org/10.1016/j.enconman.2021.114605 |
op_relation |
https://orbit.dtu.dk/en/publications/928da81a-6922-494c-a6a2-f356796a3d1d |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.enconman.2021.114605 |
container_title |
Energy Conversion and Management |
container_volume |
245 |
container_start_page |
114605 |
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