Climate mitigation efficacy of anaerobic digestion in a decarbonising economy

Styles, David; Yesufu, Jalil; Bowman, Martin; Williams, A. Prysor; Duffy, Colm; Luyckx, Karen

doi:10.1016/j.jclepro.2022.130441

Cited by 16 publications

(6 citation statements)

References 64 publications

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“…However, due to the unforeseeable nature of highly complex systems, such as a CE market system, it is likely impossible to find meaningful conditions that are both necessary and appropriate 82 . While we acknowledge the limitations of the study, this does not negate the value of these results, highlighting the important relationships between decarbonization and circularity in multiple FW management scenarios 10 …”

Section: Resultsmentioning

confidence: 79%

“…82 While we acknowledge the limitations of the study, this does not negate the value of these results, highlighting the important relationships between decarbonization and circularity in multiple FW management scenarios. 10 The decarbonizing ranking results revealed that three scenarios other than the landfill scenario achieve the zero-waste-to-landfill target, albeit the results are very different in terms of circularity, carbon emissions, and costs. This indicates that a variety of aspects should be considered before selecting technologies for goal-originated WM systems and BM planning.…”

Section: Business Modelmentioning

confidence: 99%

“…Closing material loops is not enough to guarantee environmental improvement. Hence, a chosen WM strategy is expected to be delivered in the context of more circular and decarbonized economies 8,10 …”

Section: Introductionmentioning

confidence: 99%

“…Hence, a chosen WM strategy is expected to be delivered in the context of more circular and decarbonized economies. 8,10 Moving towards a circular economy (CE) will require a shift throughout the value chain, including new business models and consumer behavior. 8 The purpose of the CE is to rethink our economies and eventually decouple our prosperity from materials consumption, carbon emissions and waste.…”

mentioning

confidence: 99%

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Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

Maçin,

Arıkan,

Altınbaş

et al. 2023

Env Prog and Sustain Energy

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Food waste is a significant environmental issue today, as it contributes to depleting natural resources and greenhouse gas emissions from improper management. To address this, alternative food waste management and recovery strategies must be developed to promote nutrient recirculation and move towards decarbonization. University campuses could play a crucial role in pioneering such strategies, through pilot studies and implementation of effective waste management. The aim of this study is to devise a food waste management strategy that provides a more circular and decarbonized economy. A case example was developed based on ITU Ayazağa Campus, Turkey, with annual separated food waste of 577 tonne per year. A Life Cycle Assessment was conducted using the EASETECH software. Four scenarios were evaluated: anaerobic digestion, composting, incineration, and landfill. Of these, incineration resulted in the highest CO2‐eq savings, but lacked decoupling and circularity of resources. Conversely, anaerobic digestion demonstrated the highest circularity and lowest toxicity. Based on these findings, anaerobic digestion was selected for further investigation. Economic transactions for the anaerobic digestion system's business models were analyzed, including revenues, municipality fees, and operating costs. The new economic model is expected to align with circular economy strategies and promote stakeholder collaboration as a significant social outcome.

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Section: Resultsmentioning

confidence: 79%

Section: Business Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

Maçin,

Arıkan,

Altınbaş

et al. 2023

Env Prog and Sustain Energy

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“…Without this comprehensive counterfactual, it is difficult to fully assess the merits of biomethane production in the context of climate change mitigation. While some studies address counterfactuals to AD usage from various feedstocks 15,16 and land utilisation 13,17 and compare GHG savings from biomethane generation and natural gas production, 18,19 none evaluate counterfactual scenarios comprehensively across all stages of the biogas and biomethane supply chain. The purpose of this study is to assess the actual GHG emissions of various biogas and biomethane supply chains.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of biogas and biomethane with natural gas and hydrogen alternatives

Bakkaloglu,

Hawkes

2024

Energy Environ. Sci.

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A Review of Life Cycle Assessment Methods to Inform the Scale‐Up of Carbon Dioxide Removal Interventions

Butnar,

Lynch,

Vetter

et al. 2024

WIREs Energy & Environment

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Life Cycle Assessment (LCA) methods are increasingly used for policy decision‐making in the context of identifying and scaling up sustainable carbon dioxide removal (CDR) interventions. This article critically reviews CDR LCA case‐studies through three key lenses relevant to policy decision‐making on sustainable CDR scale‐up, namely comparability across CDR assessments, assessment of the climatic merit of a CDR intervention, and consideration of wider CDR co‐benefits and impacts. Our results show that while providing valuable life cycle understanding, current practices utilize diverse methods, usually attributional in nature, which are CDR and time‐specific. As a result, they do not allow comprehensive cross‐comparison between CDRs, nor reveal the potential consequences of scaling up CDRs in the future. We suggest CDR LCA design requires clearer definitions of the study scope and goal, the use of more consistent functional units, greater comprehensiveness in system boundaries, and explicit baseline definitions. This would allow for robust assessments, facilitating comparison with other CDR methods, and better evidencing net climate benefits. The inventory should collect time‐dependent data on the full CDR life cycle and baseline, and report background assumptions. The impact assessment phase should evidence the climatic merits, co‐benefits, and trade‐offs potentially caused by the expanding CDR. Finally, to ensure a sustainable scale‐up of CDR, consequential analyses should be performed, and interpretation involves the comparison of all selected metrics and the permanence of carbon storage against a baseline scenario.

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Climate mitigation efficacy of anaerobic digestion in a decarbonising economy

Cited by 16 publications

References 64 publications

Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

Decarbonizing university campuses: A business model for food waste management at Istanbul Technical University (İTÜ) Ayazağa Campus, Turkey

A comparative study of biogas and biomethane with natural gas and hydrogen alternatives

A Review of Life Cycle Assessment Methods to Inform the Scale‐Up of Carbon Dioxide Removal Interventions

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