Circular Economy最新文献

Effect of different compositions of recycled concrete powder on the hydration characteristics of cement paste 再生混凝土粉不同掺量对水泥浆体水化特性的影响

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2026-02-04 DOI: 10.1016/j.cec.2026.100182

Binglin Guo , Kaixuan Wang , Cun Wang , Yuxing Gao , Di Lu , Huyong Qin , Yang Liu , Binggen Zhan , Qijun Yu , Yogarajah Elakneswaran

Recycled concrete powder (RCP) is produced via waste concrete processing. The complex sources of waste concrete form a complex and highly diverse composition in RCP. Different components in RCP affect cement hydration; however, the underlying mechanism of these influences remains unclear. The mechanism of the main components of RCP, such as unhydrated cement, C–S–H and finely ground sand, on the hydration of cement paste still lacks a comprehensive and systematic microscopic analysis. Herein, we selected three RCPs with different components: RCP1 (comprising ∼11% unhydrated cement and 67% C–S–H), RCP2 (comprising ∼56% C–S–H and 40% finely ground sand), and RCP3 (comprising 25% C–S–H and 75% finely ground sand). The influence of different components of RCP on cement hydration was systematically studied. Unhydrated cement in RCP is rehydrated in the mixed system, producing additional hydration products and increasing the total heat of hydration. These secondary hydration products fill the pores of RCP, enhancing the mechanical properties of the cement paste. Calcite in RCP reacts with monosulfate to form carboaluminate, and hemicarboaluminate is converted into monocarboaluminate after 28 days. Although C–S–H and finely ground sand in RCP exhibited different nucleation, water absorption, and filling effects, their total impact on the hydration heat and pore structure of the mixed system was similar. The mechanism is further verified by the strength prediction model. These findings elucidated the reaction mechanisms of RCP incement paste, which can be used for promoting resource-efficient and sustainable development.

再生混凝土粉（RCP）是通过对废旧混凝土的处理生产出来的。废弃混凝土的复杂来源形成了RCP中复杂且高度多样化的成分。RCP中不同组分影响水泥水化；然而，这些影响的潜在机制尚不清楚。未水化水泥、C-S-H、细磨砂等RCP主要成分对水泥浆体水化作用的机理尚缺乏全面系统的微观分析。在这里，我们选择了三种不同成分的rcp: RCP1（含有~ 11%的未水化水泥和67%的C-S-H）， RCP2（含有~ 56%的C-S-H和40%的细磨砂）和RCP3（含有25%的C-S-H和75%的细磨砂）。系统研究了RCP不同组分对水泥水化的影响。RCP中未水化的水泥在混合体系中再水化，产生额外的水化产物，增加了水化总热。这些二次水化产物填充了RCP的孔隙，提高了水泥浆体的力学性能。RCP中的方解石与单硫酸盐反应生成碳铝酸盐，28天后半碳铝酸盐转化为单碳铝酸盐。虽然C-S-H和细碎砂在RCP中的成核、吸水和填充效果不同，但它们对混合体系水化热和孔隙结构的总体影响是相似的。通过强度预测模型进一步验证了其机理。研究结果阐明了RCP水泥膏体的反应机理，为促进资源节约型和可持续发展提供了理论依据。

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引用次数: 0

Accelerating Zizania latifolia leaf silage fermentation using lactic acid bacteria 利用乳酸菌加速紫穗菊叶片青贮发酵

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.cec.2026.100184

Ting Chen , Jun Yu , Xiaoqin Yu , Jie He , Chenlong Yuan , Xuan Xu , Jun Yin , Zhiqiang Chen

Employing Zizania latifolia (Z. latifolia) leaf as ruminant forage offers a sustainable solution to food security and environmental concerns, with its demonstrated ability to reduce farming costs representing a critical implementation advantage. To overcome the pratical limitation of natural fermentation quality variability, this study evaluated two pre-screened lactic acid bacteria (LAB) strains, Lactiplantibacillus plantarum (LP) and Pediococcus pentosaceus (PP), for the potential of LAB to standardize and enhance Z. latifolia production. Through controlled ensiling experiments (LP, PP vs uninoculated control CK) combined with high-throughput sequencing technology and genomic function prediction, we mechanically elucidated how LAB optimize the fermentation process at the microbial community and metabolic pathway levels. The results demonstrated that LAB inoculation fundamentally altered the fermentation dynamics: (1) Rapid acidification: Both the LP and PP groups achieved pH < 4.2 within 3 days (vs. CK failed to reach this threshold even after 42 days), with butyric acid contents maintained at < 1 g/kg dry matter (DM) (vs 4.84 g/kg DM in CK). (2) Nutritional superiority: Inoculated groups showed 86% (LP) and 52% (PP) higher crude protein retention than CK. (3) Microbial dominance: High-throughput sequencing revealed that the relative abundance of LAB exceeded 90% within 24 h post-inoculation (vs < 35% in CK), explaining the suppressed spoilage microbiota. (4) Mechanistic insight: Gene function prediction identified quorum sensing-mediated biofilm disruption as the key accelerator. This synergistic effect enabled 35-day cycle shortening while enhancing nutritional quality, establishing a new efficiency benchmark for agri-waste valorization.

利用紫荆叶（Z. latifolia）作为反刍动物饲料，为粮食安全和环境问题提供了可持续的解决方案，其降低养殖成本的能力是一个关键的实施优势。为了克服自然发酵质量变异性的实际限制，本研究对预筛选的两种乳酸菌（LAB），即植物乳杆菌（Lactiplantibacillus plantarum， LP）和戊糖Pediococcus pentosaceus （PP）进行了评价，探讨了LAB在规范和提高香叶草生产方面的潜力。通过对照青贮实验（LP、PP和未接种对照CK），结合高通量测序技术和基因组功能预测，我们机械地阐明了LAB如何在微生物群落和代谢途径水平上优化发酵过程。结果表明，乳酸菌接种从根本上改变了发酵动态：(1)快速酸化：LP组和PP组在3 d内pH均达到4.2（对照组在42 d后仍未达到该阈值），丁酸含量维持在1 g/kg干物质（DM）（对照组为4.84 g/kg DM）。(2)营养优势：接种组粗蛋白质保留率分别比对照高86% （LP）和52% （PP）。(3)微生物优势：高通量测序显示，接种后24 h内LAB的相对丰度超过90%（对照为35%），解释了腐败菌群受到抑制的原因。(4)机制洞察：基因功能预测发现群体感应介导的生物膜破坏是关键的加速器。这种协同效应使周期缩短了35天，同时提高了营养质量，为农业废物增值建立了新的效率基准。

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引用次数: 0

Zero-waste Sports Events—A case study of the 19th Asian Games Hangzhou 零浪费体育赛事——以第19届杭州亚运会为例

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2025-11-26 DOI: 10.1016/j.cec.2025.100172

Shanming Chen , Jiansong Cao , Xiaoyan Zhao

Large-scale sporting events are often associated with substantial solid waste generation due to venue construction and high attendee numbers. The 19th Asian Games Hangzhou, noted for its unprecedented participation, experienced a significant increase in waste. Nevertheless, through the integration of the “Zero-waste City” concept and green hosting mandates, Hangzhou Asian Games successfully became the first large-scale “Zero-waste Sports Event”. This study examines the development and achievements of the “Zero-waste Asian Games”, using the 19th Asian Games Hangzhou as a case study. The research involved an analysis of pertinent policy documents from Zhejiang Province and Hangzhou concerning waste management, the “Zero-waste City” model, and the “Zero-waste Asian Games”. The “Zero-waste Asian Games” proactively incorporated “zero-waste” principles across pre-event, in-event, and post-event activities, with a focus on source reduction, reuse, and responsible solid waste disposal. This study provides valuable insights for both “Zero-waste City” development and planning future “Zero-waste Events”.

由于场馆建设和观众人数众多，大型体育赛事通常会产生大量固体废物。以空前的参与度而闻名的第19届杭州亚运会，浪费现象明显增加。尽管如此，通过“零废物城市”理念与绿色主办任务的融合，杭州亚运会成功成为首个大型“零废物体育赛事”。本研究以第19届杭州亚运会为例，考察了“零浪费亚运会”的发展与成就。本研究分析了浙江省和杭州市有关废物管理、“零废物城市”模式和“零废物亚运会”的相关政策文件。“零废物亚运会”积极将“零废物”原则纳入赛前、赛中和赛后活动，重点是减少来源、再利用和负责任的固体废物处置。这项研究为“零废物城市”的发展和未来“零废物事件”的规划提供了宝贵的见解。

引用次数: 0

E-waste in the circular economy: Molecular and experimental insights into cement incorporation of waste printed circuit board 循环经济中的电子垃圾：废弃印刷电路板中水泥掺入的分子和实验见解

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2026-02-05 DOI: 10.1016/j.cec.2026.100183

Rene Francisco Boschi Gonçalves , Zhitong Yao , José Atílio Fritz Fidel Rocco

The escalating generation of electronic waste (e-waste) poses critical environmental and health challenges, with waste printed circuit boards (WPCBs, 4 wt.%–6 wt.% of e-waste) representing a particularly hazardous fraction due to their complex composition of metals, polymers, and brominated flame retardants. This study explores the valorization of WPCBs as a partial cement replacement to both mitigate disposal risks and enhance cementitious performance. Portland cement pastes incorporating 0 wt.%, 5 wt.%, 10 wt.%, and 15 wt.% WPCBs were examined through isothermal calorimetry, Fourier transform infrared (FT-IR) spectroscopy, and reactive molecular dynamics (RMD) simulations using the reactive force field. Calorimetry revealed that 10% WPCBs yielded the highest heat release (≈25 °C peak, 10% higher than reference), indicating optimal hydration kinetics, while 15 wt.% WPCBs reduced exothermicity by 8% due to inert filler effects and bromine-induced retardation. FT-IR revealed intensified Si–O stretching (953 cm⁻¹) and free O–H (3640 cm⁻¹) at 10 wt.%, confirming enhanced C–S–H and CH formation. RMD simulations provided molecular-level insights, showing denser C–S–H networks and the lowest total energy (−6.82 × 10⁵ kcal/mol) for 10 wt.% WPCBs, whereas 15 wt.% loading disrupted network formation. The integrated findings suggested that WPCBs can be safely immobilized within cement matrices, with 10 wt.% substitution offering a balance between performance gains and hydration integrity. This work advances the understanding of WPCB–cement interactions and supports the development of sustainable, circular-economy construction materials.

电子废物（电子废物）的不断增加带来了严峻的环境和健康挑战，废弃印刷电路板（wpcb，占电子废物的4 -6 wt.%）由于其金属、聚合物和溴化阻燃剂的复杂组成，构成了特别危险的部分。本研究探讨了wpcb作为部分水泥替代品的增值，以降低处置风险并提高水泥性能。通过等温量热法、傅里叶变换红外（FT-IR）光谱和反应性分子动力学（RMD）模拟，研究了含有0 wt.%、5 wt.%、10 wt.%和15 wt.% wpcb的波特兰水泥浆。量热法显示，10%的wpcb产生了最高的放热（≈25°C的峰值，比参考值高10%），表明最佳的水化动力学，而15 wt.%的wpcb由于惰性填料效应和溴诱导的缓凝作用，放热性能降低了8%。FT-IR显示Si-O拉伸（953 cm−1）和游离O-H （3640 cm−1）增强（10 wt.%），证实C-S-H和CH形成增强。RMD模拟提供了分子水平的见解，显示了10 wt.%的wpcb更密集的C-S-H网络和最低的总能量（- 6.82 × 105 kcal/mol），而15 wt.%的负载破坏了网络的形成。综合研究结果表明，wpcb可以安全地固定在水泥基质中，10 wt.%的替代量可以在性能提高和水化完整性之间取得平衡。这项工作促进了对wpcb -水泥相互作用的理解，并支持可持续、循环经济建筑材料的发展。

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引用次数: 0

Optimization of thermochemical pyrolysis performance of distillers’ grains in a heat-storage rotary bed: A pilot study 蓄热旋转床中酒糟热化学热解性能优化：中试研究

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI: 10.1016/j.cec.2026.100179

Jingru Diao , Yifan Zhao , Pu Lyu , Xiaowei Wang , Dayang Yu , Yuchao Shao , Shijiao Li , Pengfei Wang , Shi Cheng , Zhe Zhang , Dongxiao Sun , Zhiqiang Dong , Haiya Zhang , Yilin Wang , Yilin Yang

Pyrolysis of distillers’ grains was innovatively investigated to establish a multi-objective optimization framework, identifying the optimal pyrolysis time, in a 2.8 t/h pilot-scale regenerative rotary-bed reactor under fixed temperature profiles (700–900 °C) and an inert nitrogen atmosphere. Three residence-time scenarios (60, 70, 80 min) were systematically evaluated to balance product yields, char quality, gas composition and energy input. The findings indicated that extending residence time decreased solid yield by 3%–6%, increased gas yield by 5%–10%, and reduced char volatile matter from 12.7% to 7.3%, while its calorific value declined from 4435 to 4107 kcal/kg. Remarkably, the combustible gas fraction (H₂, CO, CH₄, C_nH_m) exhibited a non-linear trend (71.7%–77.7%), and the specific energy consumption rose from 3.0 to 3.7 GJ/t. Conclusively, a multi-criteria assessment incorporating product distribution, char properties, gas heating value, and energy demand identified 70 min as the industrially optimal residence time, delivering maximal product value with the lowest energy penalty (3.2 GJ/t). The findings establish critical engineering parameters for large-scale pyrolysis of distillery waste through advanced rotary-bed pyrolysis technology, supporting sustainable waste management and circular bioeconomic development.

在固定温度（700 ~ 900℃）和惰性氮气氛下，采用2.8 t/h的中试蓄热式旋转床反应器对酒糟进行了创新性的热解研究，建立了多目标优化框架，确定了最佳热解时间。系统评估了三种停留时间方案（60、70、80分钟），以平衡产品产量、焦炭质量、气体成分和能量输入。结果表明，延长停留时间可使固相产率降低3% ~ 6%，气相产率提高5% ~ 10%，焦炭挥发物由12.7%降至7.3%，发热量由4435 kcal/kg降至4107 kcal/kg。可燃气体馏分（H2、CO、CH4、CnHm）呈非线性变化趋势（71.7% ~ 77.7%），比能耗从3.0 GJ/t上升至3.7 GJ/t。最后，综合产品分布、木炭特性、燃气热值和能源需求的多标准评估确定70分钟为工业最佳停留时间，以最低的能源损失（3.2 GJ/t）提供最大的产品价值。研究结果为利用先进的旋转床热解技术大规模热解酒糟废弃物确立了关键工程参数，为废弃物可持续管理和循环生物经济发展提供支持。

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引用次数: 0

Development of latex-based sustainable composites reinforced with leather trimming dust and ZnO nanoparticles for antibacterial shoe insole application: A circularity approach 用皮革修整粉尘和氧化锌纳米颗粒增强乳液基可持续复合材料抗菌鞋垫的开发：一种循环方法

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2026-02-02 DOI: 10.1016/j.cec.2026.100181

Md. Ariful Islam , Papia Haque , Mohammed Mizanur Rahman

This study addresses the challenge of solid waste management in the leather industry, particularly focusing on vegetable-tanned leather trimming dusts, which are often underutilized. Instead of traditional applications such as fish/poultry feed or cosmetics, this research proposes an innovative approach to repurpose this waste material by incorporating green zinc oxide nanoparticles (ZnO NPs) to produce antibacterial shoe insoles. ZnO NPs were synthesized using the chemical co-precipitation method and the plant-mediated synthesis method with banana peel extract. The nanoparticles were integrated into vegetable-tanned leather trimming dust and latex-based biocomposites optimized with the multi-criteria decision-making weighted sum model (MCDM–WSM). Through comprehensive characterization techniques, including FTIR, XRD, FESEM, EDX, DLS, and thermal analysis, the successful incorporation of nano-sized ZnO was confirmed, demonstrating diameters ranging from 65 to 91 nm and uniform distribution within the composite matrix. The composite showed enhanced mechanical properties, with tensile strength ranging from 11.6 ± 0.6 to 13.5 ± 0.2 MPa, a flexing index of approximately 3.95, and a stitch tear strength between 845 and 867 N/mm, which are comparable to the mechanical properties of a shoe insole. Antibacterial testing further revealed significant inhibition of Bacillus subtilis and Escherichia coli growth. These findings emphasize the potential of the composite as a viable alternative to conventional insoles, offering enhanced antibacterial benefits.

本研究解决了皮革工业中固体废物管理的挑战，特别侧重于经常未充分利用的植物鞣制皮革修剪粉尘。与鱼/家禽饲料或化妆品等传统应用不同，这项研究提出了一种创新的方法，通过加入绿色氧化锌纳米颗粒（ZnO NPs）来重新利用这些废物来生产抗菌鞋垫。以香蕉皮提取物为原料，采用化学共沉淀法和植物介导法合成氧化锌纳米粒子。采用多准则决策加权和模型（MCDM-WSM）对植物鞣革修剪粉尘和乳胶基生物复合材料进行优化。通过FTIR， XRD， FESEM， EDX， DLS和热分析等综合表征技术，证实了纳米ZnO的成功掺入，其直径在65 ~ 91 nm之间，并且在复合基体内分布均匀。复合材料的抗拉强度在11.6±0.6 ~ 13.5±0.2 MPa之间，弯曲指数约为3.95，缝线撕裂强度在845 ~ 867 N/mm之间，与鞋垫的机械性能相当。抑菌试验进一步显示，对枯草芽孢杆菌和大肠杆菌的生长有显著抑制作用。这些发现强调了复合材料作为传统鞋垫的可行替代品的潜力，提供了增强的抗菌效果。

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引用次数: 0

Life cycle assessment approach for upcycling expanded polystyrene across industrial sectors 工业部门升级回收膨胀聚苯乙烯的生命周期评估方法

Circular Economy

Pub Date : 2026-03-01 Epub Date: 2026-01-30 DOI: 10.1016/j.cec.2026.100180

Haoyang He , Jon Timbers , Claude-Anne Duval , Michael Cech , Joel DeMeritt , Johnny Lincoln , Oladele A. Ogunseitan , Julie M. Schoenung

The recycling of polystyrene and its reuse in consumer products, such as bicycle helmets, is important to the implementation of a circular economy due to its high production volume and environmental recalcitrance. In this study, we conducted a streamlined life cycle assessment to compare the environmental impact of producing expandable polystyrene from primary sources with production from post-consumer waste. In addition, we evaluated the environmental impact of utilizing these two polystyrene feedstock materials in bicycle helmets, and we further compared these impacts to those associated with other compositional and packaging materials. We applied up-to-date manufacturing data and well-established life cycle inventory databases using the ReCiPe 2016 life cycle impact assessment method. The seventeen environmental impact categories evaluated exhibit beneficial net reductions (in the range of 0%–45%) for the case study of using 50% post-consumer recycled expanded polystyrene. A focused analysis on global warming potential, fine particulate matter formation, freshwater ecotoxicity, human carcinogenic toxicity, mineral resource scarcity, and water consumption illustrates higher reductions in impact (in the range of 40%–45%) for global warming potential, fine particulate matter formation, and carcinogenicity and lower reductions in impact (in the range of 10%–15%) for freshwater toxicity and water consumption. Notably, the contribution of utilities is smaller than that of materials in most of the environmental impact categories, except for water consumption. In addition, the environmental impact is reduced when using 50% post-consumer polystyrene for the manufacturing of bicycle helmets, e.g., in the range of 5%–10% for global warming potential. The results demonstrate that the use of post-consumer recycled expanded polystyrene leads to considerable environmental impact reductions and that future studies considering novel recycling technologies and broader material selection choices should be pursued.

聚苯乙烯的再循环及其在自行车头盔等消费品中的再利用对实施循环经济很重要，因为聚苯乙烯的产量很高，而且具有环境抗性。在这项研究中，我们进行了一个简化的生命周期评估，以比较从原始来源生产可膨胀聚苯乙烯和从消费后废物生产可膨胀聚苯乙烯对环境的影响。此外，我们评估了在自行车头盔中使用这两种聚苯乙烯原料对环境的影响，并进一步将这些影响与其他成分和包装材料的影响进行了比较。我们采用了最新的制造数据和完善的生命周期库存数据库，使用了ReCiPe 2016生命周期影响评估方法。对于使用50%消费后回收的膨胀聚苯乙烯的案例研究，评估的17个环境影响类别显示出有益的净减少（在0%-45%的范围内）。对全球变暖潜势、细颗粒物形成、淡水生态毒性、人类致癌毒性、矿产资源稀缺和水消耗的重点分析表明，对全球变暖潜势、细颗粒物形成和致癌性的影响降低幅度较大（在40%-45%的范围内），而对淡水毒性和水消耗的影响降低幅度较小（在10%-15%的范围内）。值得注意的是，除水消耗外，在大多数环境影响类别中，公用事业的贡献小于材料的贡献。此外，在制造自行车头盔时使用50%的消费后聚苯乙烯可以减少对环境的影响，例如，在全球变暖潜能值为5%-10%的范围内。结果表明，使用消费后回收的膨胀聚苯乙烯可大大减少对环境的影响，未来的研究应考虑新的回收技术和更广泛的材料选择。

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引用次数: 0

Life cycle assessment of phosphogypsum utilization technologies: Method application and environment performance of technologies 磷石膏利用技术的生命周期评价：方法、应用和技术的环境性能

Circular Economy

Pub Date : 2025-12-01 Epub Date: 2025-11-19 DOI: 10.1016/j.cec.2025.100171

Ning Ding , Han Cui , Jianxin Yang , Pinqiao Ren

An increasing number of technologies have been developed and applied to use phosphogypsum (PG) resources and reduce their environmental impact (EI) entirely. This research examines the life cycle assessment (LCA) of six types of PG utilization technologies (PGUTs), with a focus on evaluating the limitations of the product LCA method, exploring methodological improvements, and reviewing the EI of these technologies. Owing to the diverse characteristics of technologies and products, variations were observed in the LCA components of the functional unit, system boundary, inventory allocation methods, and selection of EI categories. For most PGUTs, abiotic depletion potential and global warming potential were the predominant categories, with ecotoxicity also identified as a significant concern. This research highlights the inapplicability of LCA for technology, provides specific suggestions for setting key components of LCA for PGUTs for the first time, proposes an innovation improvement for the LCA method and contributes to the optimization and selection of PGUTs.

越来越多的磷石膏（PG）资源被开发和应用于全面利用磷石膏资源并降低其环境影响（EI）的技术。本研究对六种PG利用技术（PGUTs）的生命周期评估（LCA）进行了研究，重点评估了产品LCA方法的局限性，探讨了方法的改进，并对这些技术的EI进行了回顾。由于技术和产品的不同特性，在功能单元的LCA组成、系统边界、库存分配方法和EI类别选择等方面存在差异。对于大多数pgut来说，非生物耗竭潜力和全球变暖潜力是主要的类别，生态毒性也被认为是一个重要的问题。本研究突出了LCA在技术上的不适用性，首次对pgut关键部件的LCA设置提出了具体建议，并对LCA方法提出了创新改进，为pgut的优化选择做出了贡献。

引用次数: 0

The impact of green technology innovation on the comprehensive utilization rate of non-hazardous industrial solid waste 绿色技术创新对无害工业固体废物综合利用率的影响

Circular Economy

Pub Date : 2025-12-01 Epub Date: 2025-11-17 DOI: 10.1016/j.cec.2025.100169

Ruiheng Liu , Zhengning Pu , Yasong Zhao , Cheng Yu , Jiawei Wang

The comprehensive utilization of non-hazardous industrial solid waste (NHISW) is a key focus of the circular economy. This paper argues that green technology innovation is a crucial factor in improving the comprehensive utilization rate of NHISW. Through theoretical analysis, an empirical study is conducted using a sample of 297 cities in China from 2003 to 2019. The study revealed that green technology innovation can significantly enhance the comprehensive utilization rate of the NHISW. This conclusion remains robust after conducting robustness tests and addressing endogeneity issues via two-stage least squares (2SLS) and the difference generalized method of moments (GMM) estimation. The heterogeneity analysis reveals that green technology innovation significantly boosts the comprehensive utilization of NHISW in the first stage of the environmental Kuznets curve, but its marginal effect decreases as the economy grows. Additionally, a higher proportion of the secondary sector negatively moderates this relationship. This study suggests that the government can strengthen policy support for green technology innovation and encourage the application of green technology to improve the comprehensive utilization rate of NHISW.

无害工业固体废物的综合利用是循环经济发展的重点。本文认为，绿色技术创新是提高新西洋厂综合利用率的关键因素。通过理论分析，以2003 - 2019年中国297个城市为样本进行实证研究。研究发现，绿色技术创新可以显著提高高铁高铁综合利用率。通过两阶段最小二乘法（2SLS）和差分广义矩法（GMM）估计进行鲁棒性检验并解决内生性问题后，该结论仍然具有鲁棒性。异质性分析表明，在环境库兹涅茨曲线的第一阶段，绿色技术创新显著促进了城市高能耗水的综合利用，但其边际效应随着经济增长而降低。此外，较高比例的第二产业对这种关系起到了负调节作用。研究建议政府应加强对绿色技术创新的政策支持，鼓励绿色技术的应用，以提高高铁综合利用率。

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引用次数: 0

Enhancing plant growth using anaerobic co-digestate of pig manure, food waste, and coffee grounds 利用猪粪、食物垃圾和咖啡渣的厌氧共消化促进植物生长

Circular Economy

Pub Date : 2025-12-01 Epub Date: 2025-11-19 DOI: 10.1016/j.cec.2025.100170

Thipwan Jiemanukunkij , Cheerapat Supawatkon , Charndanai Tirapanampai , Kittituch Thupwong , Apisit Wongsabot , Ruchanok Tinikul , Pimchai Chaiyen , Somchart Maenpuen , Thanyaporn Wongnate

This study demonstrates a novel application of anaerobic co-digestate liquid (AcoDL), derived from pig manure inoculum, food waste, and spent coffee grounds (PMI/FW/SCG), as a sustainable biofertilizer. The PMI/FW/SCG AcoDL exhibited a favorable physicochemical profile (pH 8.09, electrical conductivity 14.44 mS/cm; N–P–K: 0.16–1.23–0.15% w/w) and contained plant growth-promoting compounds such as salicylic acid, kinetin, and essential amino acids. Microbial community analysis revealed a dominance of beneficial taxa, particularly Methanothrix soehngenii (55.98%) and Propionibacterium sp. (5.76%). In hydroponic cultivation, AcoDL supplementation increased the biomass of green oak lettuce by approximately 2.7-fold (127.6 g compared with 47.9 g in the controls). In soil-based systems, the combination of AcoDL with cow manure markedly increased triterpene accumulation in Gotu Kola, with asiaticoside (71.49 mg) and madecassoside (41.55 mg) levels reaching 2–3 times higher than those in the controls. Biotoxicity assays confirmed its safety for agricultural applications. Collectively, these findings demonstrate that PMI/FW/SCG AcoDL functions as a sustainable and eco-friendly fertilizer that not only improves crop yield but also promotes the production of bioactive compounds. By converting organic waste into a high-value agricultural input, this approach advances circular waste management, reduces reliance on synthetic fertilizers, and supports sustainable crop production.

本研究展示了厌氧共消化液（AcoDL）作为可持续生物肥料的新应用，该液体来自猪粪接种物、食物垃圾和废咖啡渣（PMI/FW/SCG）。PMI/FW/SCG AcoDL具有良好的理化特性（pH为8.09，电导率为14.44 mS/cm， N-P-K为0.16-1.23-0.15% w/w），含有促进植物生长的化合物，如水杨酸、动蛋白和必需氨基酸。微生物群落分析显示，有益菌群占优势，尤以soehngeni甲烷菌（55.98%）和丙酸杆菌（5.76%）为主。在水培栽培中，AcoDL的添加使绿橡树生菜的生物量增加了约2.7倍（127.6 g，而对照组为47.9 g）。在土基系统中，AcoDL与牛粪的配伍显著增加了白头翁体内三萜的积累，其中积雪草苷（71.49 mg）和马齿苋苷（41.55 mg）的含量达到对照的2-3倍。生物毒性试验证实了其在农业上的安全性。综上所述，PMI/FW/SCG AcoDL作为一种可持续和环保的肥料，不仅可以提高作物产量，还可以促进生物活性化合物的产生。通过将有机废物转化为高价值的农业投入，这种方法促进了废物循环管理，减少了对合成肥料的依赖，并支持可持续作物生产。

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引用次数: 0