Phosphate-enhanced co-composting of municipal sludge and forestry residues for low-carbon topsoil improvement
リン酸強化共堆肥化による都市汚泥と林業残渣からの低炭素表土改良 (AI 翻訳)
Qiao Li, Jiuxian Yang, Ying Wang, Yipeng Wang, Wenyou Wu, Jiyuan Jin, Yalin Yu, Junfeng Zhang, Dongdong Ge
🤖 gxceed AI 要約
日本語
本研究では、都市下水汚泥と林業残渣（おがくず、落ち葉）を用いたリン酸強化共堆肥化プロセスを最適化し、高標高の水力発電ダム貯水池域の劣化表土を改良するための高品質土壌改良材を開発した。C/N比25、おがくずと落ち葉の混合、および0.6mmol P/g乾燥固形分のリン酸添加により、堆肥化時間を16日に短縮し、栄養塩保持を向上させた。圃場試験では9%の堆肥添加により有機物含有量が5.20から44.53g/kgに増加し、かさ密度が低下した。この戦略は有機炭素の安定化、廃棄物排出削減、土壌炭素隔離を通じて低炭素社会に貢献する。
English
This study optimizes phosphate-enhanced co-composting of municipal sludge and forestry residues to produce a high-quality soil amendment for degraded topsoils in high-altitude hydropower reservoir areas. With a C/N ratio of 25, a sawdust-leaves mixture, and 0.6 mmol P/g dry solid, composting time was reduced to 16 days and nutrient retention improved. Field application at 9% addition increased organic matter from 5.20 to 44.53 g/kg and reduced bulk density. The strategy contributes to carbon neutrality via organic carbon stabilization, waste emission reduction, and soil carbon sequestration.
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
日本では廃棄物処理と土壌改良の連携が進んでおらず、本研究成果は自治体や建設業界における低炭素型の土壌再生手法として参考になる。特に、高標高ダムサイトなどの特殊環境での適用が期待される。
In the global GX context
This paper presents a low-carbon circular economy approach linking waste management, ecological restoration, and carbon sequestration. It offers a replicable model for improving degraded soils in infrastructure projects while contributing to emission reductions, relevant to global climate mitigation strategies.
👥 読者別の含意
🔬研究者:Provides optimized composting parameters (C/N ratio, bulking agent, phosphate dosage) for high-quality soil amendment production.
🏢実務担当者:Offers a practical, low-carbon solution for converting municipal sludge and forestry residues into soil conditioner for ecological restoration.
🏛政策担当者:Demonstrates a policy pathway integrating waste management with carbon sequestration and renewable energy infrastructure development.
📄 Abstract（原文）
The degradation of high-altitude hydropower reservoir slopes limits slope stability and ecological restoration. This work proposes phosphate-enhanced co-composting, which transforms municipal sludge and forestry residues (sawdust and fallen leaves) into a high-quality soil amendment suitable for degraded topsoils in the Shuangjiangkou reservoir area. The co-composting process was optimized by adjusting the carbon/nitrogen (C/N) ratio, bulking agent composition, and the phosphate dosage. A C/N ratio of 25 with a sawdust–leaves composite produced stable thermophilic conditions, increased microbial enzymatic activity, accelerated organic matter decomposition, and minimized ammonium loss. Moderate phosphate addition of 0.6 mmol P/g dry solid reduced composting time to 16 days and enhanced nutrient retention. Field application of the mature compost at a 9% addition rate significantly improved the treated soils, increasing organic matter from 5.20 to 44.53 g/kg and decreasing bulk density from 1.40 to 1.31 g/cm3, while nutrient contents and heavy metal concentrations met regulatory requirements. The phosphate-enhanced co-composting strategy provides an efficient and safe solution for soil amendment in high-altitude hydropower reservoir regions, particularly contributing to carbon neutrality by promoting organic carbon stabilization, reducing waste-related emissions, and enhancing soil carbon sequestration. These findings demonstrate a low-carbon pathway linking waste management, ecological restoration, and renewable energy infrastructure development.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.36922/ajwep026040018first seen 2026-05-17 05:52:16
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