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Comparative Carbon Footprint Analysis of Sludge Management Pathways in Isolated Regions

隔離地域における汚泥管理経路の比較カーボンフットプリント分析 (AI 翻訳)

Oliver Díaz, Enrique González, Elisabet Segredo-Morales

Sustainability📚 査読済 / ジャーナル2026-05-09#炭素会計Origin: EU
DOI: 10.3390/su18104726
原典: https://doi.org/10.3390/su18104726

🤖 gxceed AI 要約

日本語

本研究は、スペイン領カナリア諸島の2つの島（フエルテベントゥラ島とテネリフェ島）を対象に、下水汚泥の異なる管理経路のカーボンフットプリントを比較分析した。従来の埋立処理から熱化学的変換プロセスまでを評価し、集中型の熱化学処理、特に熱分解で最大の脱炭素効果が得られることを示した。結果は、同様の隔離地域における廃水処理施設の脱炭素戦略に資する。

English

This study presents a comparative cradle-to-gate carbon footprint analysis of various sludge management pathways in the Canary Islands. It finds that centralized thermochemical processing, especially pyrolysis, offers the greatest decarbonization potential, reducing emissions by up to 54% in Tenerife and 40% in Fuerteventura. The findings provide a strategic framework for decarbonizing wastewater sludge management in isolated regions.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

日本でも離島や過疎地域での下水汚泥処理は課題であり、本手法は地域特性に応じた脱炭素経路の評価に応用可能。ただし、日本の廃水処理インフラや規制との整合性には追加検討が必要。

In the global GX context

This paper contributes to the global discourse on decarbonizing wastewater infrastructure by providing a comparative carbon footprint methodology for sludge management. It aligns with climate disclosure frameworks such as TCFD and ISSB by quantifying Scope 1 and 2 emissions from treatment operations. The results are particularly relevant for isolated regions seeking cost-effective decarbonization pathways.

👥 読者別の含意

🔬研究者:The paper offers a rigorous life-cycle assessment methodology for comparing sludge management options, which can be adapted to other regions and integrated with broader carbon accounting systems.

🏢実務担当者:Wastewater treatment operators can use the findings to prioritize investment in pyrolysis or other thermochemical processes to reduce carbon footprint in isolated settings.

🏛政策担当者:Regulators can reference this study when designing regional decarbonization strategies for water and waste sectors, especially in areas with limited land and high transport costs.

📄 Abstract（原文）

In isolated areas, wastewater reuse is a key solution to water scarcity, enabling the completion of the integral water cycle. However, managing sludge from treatment plants in these regions poses significant environmental and economic challenges, particularly due to limited land availability. This study presents a cradle-to-gate comparative carbon footprint analysis of various sludge management pathways, ranging from traditional systems to advanced thermochemical conversion processes. The regional assessment reveals a significantly higher carbon footprint in Fuerteventura (23.0 kg CO2,eq/capita · year) compared to Tenerife (13.2 kg CO2,eq/capita · year). Centralized thermochemical processing shows the greatest decarbonization potential under the studied conditions; specifically, pyrolysis maximizes the reduction to 54% and 40% for Tenerife and Fuerteventura, respectively. This behavior is due to the carbon footprint recovery associated with pyrolysis byproducts. However, these findings are based solely on carbon footprint considerations and are subject to the technical and operational feasibility of thermochemical processing. These results provide a strategic framework for decarbonizing wastewater treatment plants in similar regions, identifying the most efficient pathways toward achieving carbon neutrality in the sludge line.

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