Environmental impact of sewage sludge co-digestion with food waste and fat-oil-grease: Integrating plant-wide modeling with life cycle assessment approach

Filiz Daskiran; Hazal Gulhan; Emircan Kara; Huseyin Guven; Hale Ozgun; Mustafa Evren Ersahin

doi:10.1016/j.biortech.2023.130198

Environmental impact of sewage sludge co-digestion with food waste and fat-oil-grease: Integrating plant-wide modeling with life cycle assessment approach

Filiz Daskiran^*
, Hazal Gulhan
, Emircan Kara
, Huseyin Guven
, Hale Ozgun
, Mustafa Evren Ersahin

^*Corresponding author for this work

Department of Environmental Engineering

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Anaerobic co-digestion of fat-oil-grease (FOG) and food waste (FW) with sewage sludge (SS) in wastewater treatment plants is a method used to increase biogas production. In this study, digestion scenarios were compared using plant-wide modeling and life cycle assessment: Scenario-0 (mono-digestion of waste-activated sludge (WAS)), Scenario-1 (co-digestion of WAS with FOG), and Scenario-2 (co-digestion of WAS with FW). Scenario-0, with the highest energy use and landfilling of FOG/FW, has the worst environmental impact. Scenario-1 and Scenario-2 minimize the environmental load by energy recovery and avoiding landfilling of organic waste. Scenario-wise, the change in greenhouse gas (GHG) emissions from treatment was negligible. However, due to the impact of landfilling, GHG emissions in Scenario-0 were 21% and 30% higher than in Scenario-1 and 2, respectively. The environmental benefit of anaerobic co-digestion of FOG/FW with SS is not only in the contribution to energy production but also in the recycling of organic waste.

Original language	English
Article number	130198
Journal	Bioresource Technology
Volume	394
DOIs	https://doi.org/10.1016/j.biortech.2023.130198
Publication status	Published - Feb 2024

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Ltd

Funding

The authors would like to express their gratitude for the support of the Istanbul Technical University, Scientific Research Projects: Filiz Daskiran (Project No: 43646) and Emircan Kara (Project No: 44607). The authors would like to express their gratitude to Istanbul Water and Sewerage Administration (ISKI) for providing data. The authors would like to express their gratitude for the support of the Istanbul Technical University , Scientific Research Projects: Filiz Daskiran (Project No: 43646 ) and Emircan Kara (Project No: 44607 ). The authors would like to express their gratitude to Istanbul Water and Sewerage Administration (ISKI) for providing data.

Funders	Funder number
Filiz Daskiran	44607, 43646
ISKI
Istanbul Water and Sewerage Administration
Istanbul Teknik Üniversitesi

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation
SDG 7 Affordable and Clean Energy
SDG 9 Industry, Innovation, and Infrastructure
SDG 12 Responsible Consumption and Production
SDG 13 Climate Action

Keywords

Anaerobic co-digestion
Biological modeling
Environmental assessment
Landfilling
Organic waste

Access to Document

10.1016/j.biortech.2023.130198

Cite this

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title = "Environmental impact of sewage sludge co-digestion with food waste and fat-oil-grease: Integrating plant-wide modeling with life cycle assessment approach",

abstract = "Anaerobic co-digestion of fat-oil-grease (FOG) and food waste (FW) with sewage sludge (SS) in wastewater treatment plants is a method used to increase biogas production. In this study, digestion scenarios were compared using plant-wide modeling and life cycle assessment: Scenario-0 (mono-digestion of waste-activated sludge (WAS)), Scenario-1 (co-digestion of WAS with FOG), and Scenario-2 (co-digestion of WAS with FW). Scenario-0, with the highest energy use and landfilling of FOG/FW, has the worst environmental impact. Scenario-1 and Scenario-2 minimize the environmental load by energy recovery and avoiding landfilling of organic waste. Scenario-wise, the change in greenhouse gas (GHG) emissions from treatment was negligible. However, due to the impact of landfilling, GHG emissions in Scenario-0 were 21\% and 30\% higher than in Scenario-1 and 2, respectively. The environmental benefit of anaerobic co-digestion of FOG/FW with SS is not only in the contribution to energy production but also in the recycling of organic waste.",

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doi = "10.1016/j.biortech.2023.130198",

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AU - Guven, Huseyin

AU - Ozgun, Hale

AU - Ersahin, Mustafa Evren

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AB - Anaerobic co-digestion of fat-oil-grease (FOG) and food waste (FW) with sewage sludge (SS) in wastewater treatment plants is a method used to increase biogas production. In this study, digestion scenarios were compared using plant-wide modeling and life cycle assessment: Scenario-0 (mono-digestion of waste-activated sludge (WAS)), Scenario-1 (co-digestion of WAS with FOG), and Scenario-2 (co-digestion of WAS with FW). Scenario-0, with the highest energy use and landfilling of FOG/FW, has the worst environmental impact. Scenario-1 and Scenario-2 minimize the environmental load by energy recovery and avoiding landfilling of organic waste. Scenario-wise, the change in greenhouse gas (GHG) emissions from treatment was negligible. However, due to the impact of landfilling, GHG emissions in Scenario-0 were 21% and 30% higher than in Scenario-1 and 2, respectively. The environmental benefit of anaerobic co-digestion of FOG/FW with SS is not only in the contribution to energy production but also in the recycling of organic waste.

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Environmental impact of sewage sludge co-digestion with food waste and fat-oil-grease: Integrating plant-wide modeling with life cycle assessment approach

Abstract

Bibliographical note

Funding

UN SDGs

Keywords

Access to Document

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