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Life cycle assessment of combination of anaerobic digestion and pyrolysis: focusing on different options for biogas use

Advances in geosciences, 2019-08, Vol.49, p.57-66 [Peer Reviewed Journal]

COPYRIGHT 2019 Copernicus GmbH ;2019. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 1680-7359 ;ISSN: 1680-7340 ;EISSN: 1680-7359 ;DOI: 10.5194/adgeo-49-57-2019

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Title:
Life cycle assessment of combination of anaerobic digestion and pyrolysis: focusing on different options for biogas use
Author: Mohammadi, Ali ; G. Venkatesh ; Sandberg, Maria ; Eskandari, Samieh ; Granström, Karin
Subjects: Air pollution control ; Anaerobic digestion ; Anaerobic treatment ; Analysis ; Biogas ; Biomass energy ; Carbon sequestration ; Charcoal ; Climate change ; Cooking ; Dewatering ; Digestion ; District heating ; Drying ; Emissions ; Emissions (Pollution) ; Emissions control ; Energy ; Energy recovery ; Environmental assessment ; Environmental auditing ; Environmental impact ; Fuel industry ; Gases ; Gasoline ; Global temperature changes ; Global warming ; Heating ; Households ; Life cycle ; Life cycle analysis ; Life cycle assessment ; Life cycles ; Methods ; Mitigation ; Novels ; Nutrient cycles ; Paper industry ; Paper mills ; Pollution control ; Pulp ; Pulp & paper industry ; Pulp & paper mills ; Pyrolysis ; Reduction ; Sequestering ; Sewage sludge digestion ; Sludge ; Sludge treatment ; Soil ; Soil carbon ; Soils ; Technology ; Transportation ; Transportation industry ; Wood pulp industry
Is Part Of: Advances in geosciences, 2019-08, Vol.49, p.57-66
Description: The combination of anaerobic digestion and pyrolysis technologies could be a novel energy-biochar production system to maximize energy and nutrient recovery from pulp and paper mill sludge. Herein, the life-cycle energy production and emissions reduction of sludge treatment from a typical pulp and paper mill were investigated, in which alternative uses of biogas for industrial or household application, in different regions of the world, were assessed. The three scenarios considered for different end-uses of biogas are: (A) biogas for vehicle fuel in the transportation sector in Sweden, (B) biogas for heat and electricity in the power sector in Brazil, and (C) biogas for cooking in households in China. The results of Environmental Life-Cycle Assessment (E-LCA) show that for all these three scenarios, the use of biogas and pyrolysis gas contributes most to emissions mitigation, while the dewatering and drying processes carried out on the sludge, contribute the most to the environmental emissions. Addition of biochar to the soil, contributes significantly to a reduction in global warming by sequestering carbon in the soil. Compared to scenarios B and C, Scenario A, in which biogas substitutes gasoline in transportation, and heat from combusted pyrolysis gases is used for district heating in Sweden, demonstrates the highest environmental performance for all the evaluated impact categories.
Publisher: Katlenburg-Lindau: Copernicus GmbH
Language: English
Identifier: ISSN: 1680-7359
ISSN: 1680-7340
EISSN: 1680-7359
DOI: 10.5194/adgeo-49-57-2019
Source: DOAJ Directory of Open Access Journals
AUTh Library subscriptions: ProQuest Central

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Life cycle assessment of combination of anaerobic digestion and pyrolysis: focusing on different options for biogas use

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