Towards Circular Carbon and Water Synergies: Environmental Assessment of Integrated Biogas-Derived Carbon Dioxide Capture and Storage
循環型炭素と水の相乗効果に向けて：バイオガス由来CO2回収・貯留の統合環境評価 (AI 翻訳)
Nick Schäuble, Marius Wehinger, Chihchi Huang, Mengshan Lee, Jan Hoinkis, Markus Graf
🤖 gxceed AI 要約
日本語
バイオガスからのCO2回収と液肥処理を統合した新プロセスをLCAで評価。再生可能エネルギーと低炭素アンモニアを用いたグリーンシナリオでは、100年以上の貯蔵とアルカリ性土壌条件下で正味負の排出（CO2貯蔵1kgあたり0.45kg CO2e）を達成。ドイツ全バイオガスプラントへの展開で年間4.73 Mt CO2eの削減が見込まれ、循環型資源利用と負排出の両立可能性を示す。
English
A life cycle assessment of an integrated process combining CO2 removal from biogas with liquid digestate treatment for water recovery and nutrient concentration. The green scenario achieves net-negative emissions of 0.45 kg CO2e per kg CO2 stored under alkaline soil and >100-year storage. Upscaling to all German biogas plants yields 4.73 Mt CO2e/year net-negative mitigation, demonstrating integrated negative emissions with circular resource use.
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
日本ではバイオガス発電の普及が進むが、消化液処理やCO2回収の統合は未整備。本研究成果は、日本の農業系バイオガス施設における炭素除去と資源循環の同時達成可能性を示し、J-クレジット制度や地域循環共生圏の設計に示唆を与える。
In the global GX context
This study provides robust LCA evidence for integrated carbon capture and circular resource use in biogas systems, relevant to global negative emissions and circular economy targets. It offers decision-relevant insights for sustainable biogas deployment, aligning with ISSB and CSRD disclosure needs for agricultural and waste management sectors.
👥 読者別の含意
🔬研究者:LCA手法とCCUS統合の実証例として、負排出技術の評価方法に示唆。
🏢実務担当者:バイオガス事業者や肥料メーカーが、炭素除去と資源循環の両立策を検討する際の参考。
🏛政策担当者:バイオガス政策や炭素除去の認証制度設計に、統合的環境評価の重要性を示す。
📄 Abstract（原文）
Abstract A life cycle assessment was conducted to evaluate a novel process that combines carbon dioxide (CO2) removal from biogas via aqueous ammonia with liquid digestate treatment for simultaneous water recovery and nutrient concentration. The resulting ammonium bicarbonate enables long-term carbon storage and fertilizer application. The environmental performance of the proposed process was assessed for a conventional and a green scenario based on renewable energy supply and low-carbon ammonia production. Under alkaline soil conditions and assuming storage exceeding 100 years, the green scenario achieves net-negative emissions of 0.45 kg CO2e per kg CO2 stored (0.22 kg including credits). Climate change impacts are governed by ammonia supply and soil pH, while digestate treatment contributes only 0.6%. Upscaling the green scenario to all German biogas plants yields net-negative mitigation of 4.73 Mt CO2e/year, or 5.02 Mt CO2e/year when capped substitution credits are included. The green scenario also shows lower overall environmental impacts, despite trade-offs in material- and nutrient-related categories linked to green ammonia and renewable energy mix. Overall, the system enables integrated negative emissions with circular resource, nutrient, and water use, providing decision-relevant insights for sustainable agricultural biogas deployment.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acssuschemeng.6c03204first seen 2026-08-06 04:59:39
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