ネパールの都市固形廃棄物からのエネルギー回収と埋立地メタン排出削減：気候緩和への示唆
Energy recovery and landfill methane emission reduction from municipal solid waste: implications for climate mitigation in Nepal (原題)
Darpan Subedi, Manisha Subedi, K. C. Dipson, Sagar Kafle, Bhesh Kumar Karki
🤖 gxceed AI 要約
日本語
ネパールの埋立地を事例に、メタン排出量をLandGEMとIPCCモデルで推定し、エネルギー回収と水素生成の可能性を評価。シナリオ分析でリサイクル強化による排出削減効果を定量化し、技術経済評価で正のNPVと温室効果ガス削減ポテンシャルを示した。
English
This study estimates methane emissions from a Nepalese landfill using LandGEM and IPCC models, evaluating energy recovery and hydrogen production potential. Scenario analysis quantifies emission reductions from enhanced recycling, and techno-economic assessment shows positive NPV and significant GHG mitigation potential, supporting low-carbon transitions in emerging economies.
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
日本の廃棄物処理・エネルギー政策において、途上国向けの廃棄物発電技術やCDM案件形成に示唆を与える。特にJCM（二国間クレジット制度）を通じた技術協力の可能性があり、日本の廃棄物処理技術の海外展開に貢献し得る。
In the global GX context
This study provides empirical evidence on landfill gas valorization in low-income countries, relevant to global climate mitigation efforts. It offers insights for international climate finance and technology transfer, aligning with global goals for methane reduction and sustainable waste management.
👥 読者別の含意
🔬研究者:Provides a methodological framework for landfill gas estimation and scenario analysis applicable to developing countries.
🏢実務担当者:Offers a business case for waste-to-energy projects in emerging markets, highlighting financial viability and environmental benefits.
🏛政策担当者:Informs policy on waste management and renewable energy in developing countries, supporting climate mitigation strategies.
📄 Abstract（原文）
Rapid urbanization and the associated escalation in municipal solid waste generation, especially across developing countries, have emphasized the necessity for a circular waste economy approach, within which sustainable waste-to-energy strategies play a critical role. This study presents an integrated analysis of methane generation potential renewable electricity potential, and hydrogen recovery from large-scale landfill systems, using the Banchare Danda Landfill Site (BDLS) in Nepal as a representative case study for low-income countries. Methane (CH 4 ) emissions were estimated using two worldwide models, Landfill Gas Emissions Model (LandGEM) and the First-Order Decay (FOD) methods, to ensure resilience and methodological validation. Six comprehensive scenarios were developed to capture a range of potential future trajectories based on predictive evaluation across multiple sectors. The LandGEM model predicted a peak CH 4 emission of 15.28 kilo-tonnes per year (kt yr⁻¹), whereas the IPCC model yielded 28.9 kt yr⁻¹ in 2052. The cumulative methane yield of 1.34 × 10 9 m 3 corresponds to a recoverable energy potential of 52.7 × 10 6 kWh yr⁻¹ and a hydrogen generation capacity of 16.0 × 10 6 m 3 yr⁻¹ under baseline conditions. Scenario analysis revealed that a 1.5% annual increase in per capita waste generation could raise energy recovery to 87.3 × 10 6 kWh yr⁻¹, while enhanced recycling (50%) could diminish CH 4 emissions by approximately 24%. Techno-economic assessment indicated a positive net present value of USD 0.64 million and a greenhouse gas mitigation potential of 2.32 million tonnes of CO 2 equivalent (MT CO 2 eq). These findings demonstrate the technical and environmental viability of landfill gas valorization to support low-carbon transitions in emerging economies.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1038/s41598-026-64835-8first seen 2026-08-21 04:34:33
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