Importance of food waste pre-treatment efficiency for global warming potential in life cycle assessment of anaerobic digestion systems

My Carlsson, Irina Naroznova, Jacob Møller, Charlotte Scheutz, Anders Lagerkvist

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A need for improvement of food waste (FIAT) pre-treatment methods has been recognized, but few life cycle assessments (LCA) of FIN management systems have considered the pre-treatment with respect to input energy, loss of organic material and nutrients for anaerobic digestion (AD) and/or further treatment of the refuse. The objective of this study was to investigate how FW pre-treatment efficiency impacts the environmental performance of waste management, with respect to global warming potential (GWP). The modeling tool EASETECH was used to perform consequential LCA focusing on the impact of changes in mass distribution within framework conditions that were varied with respect to biogas utilization and energy system, representing different geographical regions and/or different time-frames. The variations of the GWP due to changes in pre-treatment efficiency were generally small, especially when biogas and refuse were substituting the same energy carriers, when energy conversion efficiencies were high and slurry quality good enough to enable digestate use on land. In these cases other environmental aspects, economy and practicality could be guiding when selecting pre-treatment system without large risk of sub-optimization with regards to GWP. However, the methane potential of the slurry is important for the net LCA results and must be included in the sensitivity analysis. Furthermore, when biogas is used as vehicle fuel the importance of pre-treatment is sensitive to assumptions and approach of modelling marginal energy which must be decided based on the focus and timeframe of the study in question. (C) 2015 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalResources, Conservation and Recycling
Volume102
Pages (from-to)58-66
Number of pages9
ISSN0921-3449
DOIs
Publication statusPublished - 2015

Keywords

  • food waste pretreatment efficiency
  • global warming potential
  • biogas 74-82-8
  • methane 74-82-8
  • 10060, Biochemistry studies - General
  • 37014, Public health - Sewage disposal and sanitary measures
  • 39008, Food microbiology - General and miscellaneous
  • Sanitation
  • anaerobic digestion applied and field techniques
  • EASETECH mathematical and computer techniques
  • life cycle assessment of anaerobic digestion systems applied and field techniques
  • marginal energy modeling mathematical and computer techniques
  • Bioprocess Engineering
  • Equipment Apparatus Devices and Instrumentation
  • Waste Management

Cite this

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title = "Importance of food waste pre-treatment efficiency for global warming potential in life cycle assessment of anaerobic digestion systems",
abstract = "A need for improvement of food waste (FIAT) pre-treatment methods has been recognized, but few life cycle assessments (LCA) of FIN management systems have considered the pre-treatment with respect to input energy, loss of organic material and nutrients for anaerobic digestion (AD) and/or further treatment of the refuse. The objective of this study was to investigate how FW pre-treatment efficiency impacts the environmental performance of waste management, with respect to global warming potential (GWP). The modeling tool EASETECH was used to perform consequential LCA focusing on the impact of changes in mass distribution within framework conditions that were varied with respect to biogas utilization and energy system, representing different geographical regions and/or different time-frames. The variations of the GWP due to changes in pre-treatment efficiency were generally small, especially when biogas and refuse were substituting the same energy carriers, when energy conversion efficiencies were high and slurry quality good enough to enable digestate use on land. In these cases other environmental aspects, economy and practicality could be guiding when selecting pre-treatment system without large risk of sub-optimization with regards to GWP. However, the methane potential of the slurry is important for the net LCA results and must be included in the sensitivity analysis. Furthermore, when biogas is used as vehicle fuel the importance of pre-treatment is sensitive to assumptions and approach of modelling marginal energy which must be decided based on the focus and timeframe of the study in question. (C) 2015 Elsevier B.V. All rights reserved.",
keywords = "food waste pretreatment efficiency, global warming potential, biogas 74-82-8, methane 74-82-8, 10060, Biochemistry studies - General, 37014, Public health - Sewage disposal and sanitary measures, 39008, Food microbiology - General and miscellaneous, Sanitation, anaerobic digestion applied and field techniques, EASETECH mathematical and computer techniques, life cycle assessment of anaerobic digestion systems applied and field techniques, marginal energy modeling mathematical and computer techniques, Bioprocess Engineering, Equipment Apparatus Devices and Instrumentation, Waste Management",
author = "My Carlsson and Irina Naroznova and Jacob M{\o}ller and Charlotte Scheutz and Anders Lagerkvist",
year = "2015",
doi = "10.1016/j.resconrec.2015.06.012",
language = "English",
volume = "102",
pages = "58--66",
journal = "Resources, Conservation and Recycling",
issn = "0921-3449",
publisher = "Elsevier",

}

Importance of food waste pre-treatment efficiency for global warming potential in life cycle assessment of anaerobic digestion systems. / Carlsson, My; Naroznova, Irina; Møller, Jacob; Scheutz, Charlotte; Lagerkvist, Anders.

In: Resources, Conservation and Recycling, Vol. 102, 2015, p. 58-66.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Importance of food waste pre-treatment efficiency for global warming potential in life cycle assessment of anaerobic digestion systems

AU - Carlsson, My

AU - Naroznova, Irina

AU - Møller, Jacob

AU - Scheutz, Charlotte

AU - Lagerkvist, Anders

PY - 2015

Y1 - 2015

N2 - A need for improvement of food waste (FIAT) pre-treatment methods has been recognized, but few life cycle assessments (LCA) of FIN management systems have considered the pre-treatment with respect to input energy, loss of organic material and nutrients for anaerobic digestion (AD) and/or further treatment of the refuse. The objective of this study was to investigate how FW pre-treatment efficiency impacts the environmental performance of waste management, with respect to global warming potential (GWP). The modeling tool EASETECH was used to perform consequential LCA focusing on the impact of changes in mass distribution within framework conditions that were varied with respect to biogas utilization and energy system, representing different geographical regions and/or different time-frames. The variations of the GWP due to changes in pre-treatment efficiency were generally small, especially when biogas and refuse were substituting the same energy carriers, when energy conversion efficiencies were high and slurry quality good enough to enable digestate use on land. In these cases other environmental aspects, economy and practicality could be guiding when selecting pre-treatment system without large risk of sub-optimization with regards to GWP. However, the methane potential of the slurry is important for the net LCA results and must be included in the sensitivity analysis. Furthermore, when biogas is used as vehicle fuel the importance of pre-treatment is sensitive to assumptions and approach of modelling marginal energy which must be decided based on the focus and timeframe of the study in question. (C) 2015 Elsevier B.V. All rights reserved.

AB - A need for improvement of food waste (FIAT) pre-treatment methods has been recognized, but few life cycle assessments (LCA) of FIN management systems have considered the pre-treatment with respect to input energy, loss of organic material and nutrients for anaerobic digestion (AD) and/or further treatment of the refuse. The objective of this study was to investigate how FW pre-treatment efficiency impacts the environmental performance of waste management, with respect to global warming potential (GWP). The modeling tool EASETECH was used to perform consequential LCA focusing on the impact of changes in mass distribution within framework conditions that were varied with respect to biogas utilization and energy system, representing different geographical regions and/or different time-frames. The variations of the GWP due to changes in pre-treatment efficiency were generally small, especially when biogas and refuse were substituting the same energy carriers, when energy conversion efficiencies were high and slurry quality good enough to enable digestate use on land. In these cases other environmental aspects, economy and practicality could be guiding when selecting pre-treatment system without large risk of sub-optimization with regards to GWP. However, the methane potential of the slurry is important for the net LCA results and must be included in the sensitivity analysis. Furthermore, when biogas is used as vehicle fuel the importance of pre-treatment is sensitive to assumptions and approach of modelling marginal energy which must be decided based on the focus and timeframe of the study in question. (C) 2015 Elsevier B.V. All rights reserved.

KW - food waste pretreatment efficiency

KW - global warming potential

KW - biogas 74-82-8

KW - methane 74-82-8

KW - 10060, Biochemistry studies - General

KW - 37014, Public health - Sewage disposal and sanitary measures

KW - 39008, Food microbiology - General and miscellaneous

KW - Sanitation

KW - anaerobic digestion applied and field techniques

KW - EASETECH mathematical and computer techniques

KW - life cycle assessment of anaerobic digestion systems applied and field techniques

KW - marginal energy modeling mathematical and computer techniques

KW - Bioprocess Engineering

KW - Equipment Apparatus Devices and Instrumentation

KW - Waste Management

U2 - 10.1016/j.resconrec.2015.06.012

DO - 10.1016/j.resconrec.2015.06.012

M3 - Journal article

VL - 102

SP - 58

EP - 66

JO - Resources, Conservation and Recycling

JF - Resources, Conservation and Recycling

SN - 0921-3449

ER -