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Life Cycle Carbon Emission Analysis of a Sludge Dewatering Facility: A South-to-North Water Diversion Case Study

汚泥脱水施設のライフサイクル炭素排出分析：南水北調事業のケーススタディ (AI 翻訳)

Cuimin Feng, Yihao Li, Sairui Guan, Ziyu Guo, Xueqing Jing

Sustainability📚 査読済 / ジャーナル2026-05-05#炭素会計Origin: CN
DOI: 10.3390/su18094555
原典: https://doi.org/10.3390/su18094555

🤖 gxceed AI 要約

日本語

本研究は、南水北調事業を水源とする水処理プラントの汚泥脱水施設を対象に、建設期と運用期の炭素排出量を排出係数法で計算。建設期3年で1385.57トンCO2-eq（素材が主因）、運用期1年で19.38トン（電力が主因）を排出。ライフサイクル視点での炭素削減戦略の重要性を示唆する。

English

This study calculates carbon emissions of a sludge dewatering facility using the emission factor method, covering construction and operation phases. Results show 1385.57 tCO2-eq in construction (materials dominant) and 19.38 tCO2-eq in operation (electricity dominant). Highlights the need for a life-cycle perspective in carbon reduction strategies for water treatment infrastructure.

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

中国の排出係数法を用いたライフサイクル評価事例は、日本の水処理施設のカーボンフットプリント算定に参考となる。ただし、直接的な日本政策連動は弱い。

In the global GX context

This paper provides a practical example of life-cycle carbon accounting for water infrastructure, which is relevant for global standards like ISSB and TCFD, especially for Scope 3 emissions from construction materials. It underscores the importance of infrastructure lifecycle thinking in climate disclosure.

👥 読者別の含意

🔬研究者:生命週期碳核算方法在水處理設施中的應用，特別是在建設和運營階段的排放貢獻。

🏢実務担当者:水処理プラント運営者は建設期の材料選定と運用期の電力消費に注目し、炭素削減策を検討できる。

🏛政策担当者:水インフラのカーボンフットプリント算定基準の策定や、建設・運営段階を含む政策設計に示唆を与える。

📄 Abstract（原文）

To mitigate the impact of global climate change, countries worldwide must take necessary measures to address this environmental issue. China’s goals of carbon peaking and carbon neutrality and the “1 + N” policy framework have provided guidance for various industries and enterprises in advancing carbon accounting, carbon reduction, and green transformation. This study focuses on the sludge dewatering facility of a typical water treatment plant, which uses water from the South-to-North Water Diversion Project as its water source. Based on its construction and operational data, the carbon emissions at different phases were calculated with the emission factor method in the study, and the composition of these emissions was analyzed. The results show that during the three-year construction period, the sludge dewatering facility emitted a total of 1385.57 tons of CO2-eq, with materials being the main source of carbon emissions. While in the one-year operation period, the facility generated 19.38 tons of CO2-eq only, with electricity consumption being the primary contributor, followed by chemicals consumption. In conclusion, both the short-term intensive emissions during the construction phase and the long-term cumulative emissions during the operation phase should be considered, so that an integrated mitigation effect can be achieved across the construction and operation stages. This highlights the necessity of adopting a life-cycle perspective in carbon reduction strategies within the defined system boundary, while also supporting the sustainable planning and management of water treatment infrastructure.

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