Consequential Life Cycle Assessment of Integrated Anaerobic Digestion–Pyrolysis–HTC Systems for Bioenergy and Biofertiliser from Cattle Slurry and Grass Silage
牛スラリーとグラスサイレージからのバイオエネルギーとバイオ肥料のための統合型嫌気性消化・熱分解・水熱炭化システムの結果帰属型ライフサイクルアセスメント (AI 翻訳)
Maneesh Kumar Mediboyina, Nishtha Talwar, Fionnuala Murphy
🤖 gxceed AI 要約
日本語
本研究は、牛スラリーとグラスサイレージを処理するための嫌気性消化（AD）と熱分解（Py）および水熱炭化（HTC）の統合システムをアイルランドの農業状況で評価。6つのシナリオを比較した結果、統合システムは単独ADより優れ、特にAD-HTCバイオ電力シナリオが最良。化石代替により気候変動・淡水富栄養化・化石資源枯渇を最大84%、86%、99%削減し、消化液由来のバイオ炭とプロセス水が鉱物肥料を代替。農産残渣の低排出管理と循環型経済に貢献。
English
This study evaluates integrated anaerobic digestion (AD) with pyrolysis (Py) and hydrothermal carbonization (HTC) for treating cattle slurry and grass silage in Ireland. Six scenarios were compared: integrated systems outperformed standalone AD, with AD-HTC bioelectricity yielding best results. Climate change, freshwater eutrophication, and fossil depletion were reduced up to 84%, 86%, and 99% respectively, while displacing mineral fertilizers. The findings support low-emission management of agricultural residues and circular economy targets.
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
日本でも家畜ふん尿や食品残渣のエネルギー・肥料利用が進む中、ADにPyやHTCを組み合わせる本手法は、消化液の高度利用とカーボンニュートラルなエネルギー供給の両立を可能にする。日本の農業分野でのバイオマス活用政策や、食品リサイクルループの強化に示唆を与える。
In the global GX context
This paper provides a rigorous consequential LCA of cascading digestate valorization, offering evidence for how integrated bioenergy systems can displace fossil fuels and synthetic fertilizers. It aligns with EU's circular economy action plan and renewable energy targets, and is relevant for any livestock-intensive region aiming to decarbonize agricultural residues.
👥 読者別の含意
🔬研究者:Provides a detailed consequential LCA methodology for integrated AD-Py/HTC systems, with comparative scenario analysis that can inform future system design and environmental impact assessments.
🏢実務担当者:Demonstrates the environmental benefits of combining AD with pyrolysis/HTC for bioenergy and biofertilizer production, offering a potential roadmap for farms or waste management facilities to reduce emissions and enhance resource efficiency.
🏛政策担当者:Supports policies promoting integrated waste-to-energy systems in agriculture, showing significant GHG and eutrophication reductions that can help meet national climate and circular economy goals.
📄 Abstract（原文）
This study evaluates the environmental outcomes of integrating anaerobic digestion (AD) with pyrolysis (Py) and hydrothermal carbonization (HTC) to treat cattle slurry and grass silage in an Irish agricultural context. A consequential life cycle assessment (CLCA) was carried out for six scenarios based on 1 t of feedstock (0.4:0.6 cattle slurry/grass silage on a VS basis): two standalone AD systems (producing bioelectricity and biomethane) and four integrated AD–Py/HTC systems with different product utilisation pathways. Across all impact categories, the integrated systems performed better than standalone AD. This improvement is mainly due to the surplus bioenergy (electricity, biomethane, hydrocarbon fuel, hydrochar) that replaces marginal fossil energy (hard coal, natural gas and heavy fuel oil), together with the displacement of mineral NPK fertilisers by digestate-derived biochar and HTC process water. Among the configurations, the AD–HTC bioelectricity scenario (S4) achieved the best overall performance, driven by higher hydrochar yields, a favourable heating value, and a lower pretreatment energy demand compared with Py-based options. Across the integrated scenarios, climate change, freshwater eutrophication, and fossil depletion impacts were reduced by up to 84%, 86%, and 99%, respectively, relative to the fossil-based reference system, while avoiding digestate and fertiliser application reduced terrestrial acidification by up to 74%. Overall, the results show that the cascading utilisation of digestate via AD–Py/HTC can simultaneously enhance bioenergy production and nutrient recycling, providing a robust pathway for low-emission management of agricultural residues. These findings are directly relevant to Ireland’s renewable energy and circular economy targets and are transferable to other livestock-intensive regions seeking to valorise slurry and grass-based residues as low-carbon energy and biofertiliser resources.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.3390/su18021040first seen 2026-06-23 06:08:57
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。