Waste management最新文献_第7页

Transforming urban waste collection inventory: AI-Based container classification and Re-Identification

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-12 DOI: 10.1016/j.wasman.2025.02.051

Javier Galán, Miguel González, Paula Moral, Álvaro García-Martín, José M. Martínez

{"title":"Transforming urban waste collection inventory: AI-Based container classification and Re-Identification","authors":"Javier Galán, Miguel González, Paula Moral, Álvaro García-Martín, José M. Martínez","doi":"10.1016/j.wasman.2025.02.051","DOIUrl":"10.1016/j.wasman.2025.02.051","url":null,"abstract":"<div><div>This work lays the groundwork for creating an automated system for the inventory of urban waste elements. Our primary contribution is the development of, to the best of our knowledge, the first re-identification system for urban waste elements that uses Artificial Intelligence and Computer Vision, incorporating information from a classification module and geolocation context to enhance post-processing performance. This re-identification system helps to create and update inventories by determining if a new image matches an existing element in the inventory based on visual similarity or, if not, by adding it as a new identity (new class or new identity of an existing class). Such a system could be highly valuable to local authorities and waste management companies, offering improved facility maintenance, geolocation, and additional applications. This work also addresses the dynamic nature of urban environments and waste management elements by exploring Continual Learning strategies to adapt pretrained systems to new settings with different urban elements. Experimental results show that the proposed system operates effectively across various container types and city layouts. These findings were validated through testing in two different Spanish locations, a “City” and a “Campus”, differing in size, illumination conditions, seasons, urban design and container appearance. For the final re-identification system, the baseline system achieves 53.18 mAP (mean Average Precision) in the simple scenario, compared to 21.54 mAP in the complex scenario, with additional challenging unseen variability. Incorporating the proposed post-processing techniques significantly improved results, reaching 74.14 mAP and 71.75 mAP in the simple and complex scenario respectively.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"199 ","pages":"Pages 25-35"},"PeriodicalIF":7.1,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chelation treatment for heavy metals in municipal solid waste incineration fly ash: 300-Day study on stability and environmental risk

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-12 DOI: 10.1016/j.wasman.2025.114745

Ze Zhang , Yang Yu , Yi Rao , Ying Wang , Chunjiang Yu , Zhongli Luo , Hongjun Zhao , Xiaona Wang , Ming Gao , Qunhui Wang , Chuanfu Wu

{"title":"Chelation treatment for heavy metals in municipal solid waste incineration fly ash: 300-Day study on stability and environmental risk","authors":"Ze Zhang , Yang Yu , Yi Rao , Ying Wang , Chunjiang Yu , Zhongli Luo , Hongjun Zhao , Xiaona Wang , Ming Gao , Qunhui Wang , Chuanfu Wu","doi":"10.1016/j.wasman.2025.114745","DOIUrl":"10.1016/j.wasman.2025.114745","url":null,"abstract":"<div><div>Landfilling after chelation is the primary method for treating municipal solid waste incineration fly ash (MSWI FA), but the long-term environmental risks of its heavy metals (HMs) remain unclear. This study used three common organic chelating agents (CAs) to stabilize MSWI FA and assessed its 300-day stability under mixed and zoned landfill scenarios. The findings showed that Pb leaching posed high environmental risks, especially in zoned landfills, with 10-year cumulative leaching of 300 mg/kg, while Cu and Zn leaching remained within limits, indicating lower environmental risks. In mixed landfills, 1.6 %-TS-300, 1.6 %-SDD, and 2.4 %-DP maintained HM leaching within landfill limits but exceeded them after 220, 30, and 60 days, respectively. In contrast, when zoned landfilling, the effective time of the chelated products was significantly shortened. Under landfill requirements, chelate effectiveness was significantly shorter, with TS-300, SDD, and DP stabilizing HMs for only 30, 18, and 10 days. The study found that CAs not only form organic complexes with HMs but also precipitates (e.g., CuS) in MSWI FA, reducing leaching. Furthermore, TS-300 can convert Pb from unstable Pb<sup>4+</sup> to stable Pb<sup>2+</sup> form, enhancing its long-term stability. In summary, CAs mitigate environmental risks of MSWI FA, but HMs leaching increase over time, especially in zoned landfills. It is advised to apply a waterproof cover to chelated MSWI FA during landfilling to mitigate environmental risks.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"200 ","pages":"Article 114745"},"PeriodicalIF":7.1,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solid waste based manufactured soil – Stabilization of “organics-microorganisms-inorganic skeleton” and performance evaluation

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-11 DOI: 10.1016/j.wasman.2025.114738

Jun Chen , Qingyi Li , Jianbo Zhang , Hao Zhou , Siwei Peng , Shufeng Qiao , Hang He , Kewei Li , Dongsheng Wang , Weijun Zhang

{"title":"Solid waste based manufactured soil – Stabilization of “organics-microorganisms-inorganic skeleton” and performance evaluation","authors":"Jun Chen , Qingyi Li , Jianbo Zhang , Hao Zhou , Siwei Peng , Shufeng Qiao , Hang He , Kewei Li , Dongsheng Wang , Weijun Zhang","doi":"10.1016/j.wasman.2025.114738","DOIUrl":"10.1016/j.wasman.2025.114738","url":null,"abstract":"<div><div>The safe disposal and utilization of bulk solid waste (SW) are critical challenges. Manufactured soil, a soil-like material composed of SW, offers a novel solution for resource recycling. However, the mechanisms underlying SW-based manufactured soil fertility development remain unclear. This study systematically investigated the performance of SW-based manufactured soil using aerobic compost sludge (ACS-soil) and anaerobic digestion sludge (ADS-soil), focusing on the microbial mechanism which driving manufactured soil fertility development. Results showed that the soil nutrient index (SNI) of SW-based manufactured soil was 5 to 8 times higher than that of natural topsoil. These soils significantly promoted wheatgrass growth. However, ACS-soil exhibited superior fertility and plant performance, maintaining stable nutrient levels, whereas the SNI value and soil pH of ADS-soil decreased by 27.13% and 17.68% respectively. Microbial community analysis revealed that homogeneous selection in ACS-soil drove microbial community succession, maintaining stable nutrition content and increasing humification degree. In ADS-soil, the rich in labile compounds (accounting for 41%) led to lower environmental stress, stochastic processes dominated bacterial succession, which driving declined pH and thus negatively impact the soil fertility. Furthermore, based on life cycle analysis results, using SW to prepare manufactured soils had lower carbon emissions than conventional disposal methods (including safe landfill, incineration and direct land use), which demonstrated that SW-based manufactured soil is a promising method for SW disposal. This research underscores the potential of SW-based manufactured soil for waste disposal and enhanced plant growth, emphasizing the importance of selecting appropriate organic components to optimize soil performance.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"200 ","pages":"Article 114738"},"PeriodicalIF":7.1,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the potential of chemical recycling using a distributed model in the UK – A life cycle assessment perspective

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-08 DOI: 10.1016/j.wasman.2025.02.052

Suviti Chari, Andrea Paulillo, Massimiliano Materazzi

{"title":"Exploring the potential of chemical recycling using a distributed model in the UK – A life cycle assessment perspective","authors":"Suviti Chari, Andrea Paulillo, Massimiliano Materazzi","doi":"10.1016/j.wasman.2025.02.052","DOIUrl":"10.1016/j.wasman.2025.02.052","url":null,"abstract":"<div><div>The study investigates the potential of chemical recycling of plastic waste in the UK, specifically through a small-scale, decentralised pyrolysis process that incorporates in-situ upgrading. With rising plastic production and limited capacity for mechanical recycling, chemical recycling (CR) emerges as a complementary solution for handling complex waste streams, such as multi-layered or contaminated plastics. The research focuses on the life cycle assessment (LCA) of a 165 kg/hr plant designed to convert mixed plastic waste (MPW) into naphtha, which can be used as a substitute of virgin petroleum feedstock in the production of plastic films. The LCA evaluates both waste and product perspectives, comparing chemical recycling with conventional waste management methods, including incineration with energy recovery (waste-to-energy) and a mixed end-of-life scenario (waste perspective) and with virgin plastic film (product perspective). Results show that chemical recycling significantly reduces climate change impacts—by 1284 kg CO<sub>2</sub>-eq./tonne compared to waste-to-energy and by 430 kg CO<sub>2</sub>-eq./tonne against the mixed end-of-life option. From the product perspective, chemically recycled naphtha results in up to 2977 kg CO<sub>2</sub>-eq./tonne or 636 kg CO<sub>2</sub>-eq./tonne lower impacts compared to virgin plastic production. The study highlights the use of small-scale, decentralised CR plants, however, challenges remain, such as the environmental impacts of by-products. The research concludes that chemical recycling offers a viable pathway to greenhouse gas emissions reductions compared to conventional waste management and virgin plastic production, albeit with interlinked trade-offs observable in other impact categories, highlighting that further optimisation and policy support are essential.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"199 ","pages":"Pages 13-24"},"PeriodicalIF":7.1,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143580129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable use of fly ash waste in tire tread rubber: Characterization of physical properties and environmental impact assessment

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-08 DOI: 10.1016/j.wasman.2025.114737

Hassarutai Yangthong , Papawarin Udomsin , Siriwan Jansinak , Supitta Suethao , Kheng Lim Goh , Wirasak Smitthipong

{"title":"Sustainable use of fly ash waste in tire tread rubber: Characterization of physical properties and environmental impact assessment","authors":"Hassarutai Yangthong , Papawarin Udomsin , Siriwan Jansinak , Supitta Suethao , Kheng Lim Goh , Wirasak Smitthipong","doi":"10.1016/j.wasman.2025.114737","DOIUrl":"10.1016/j.wasman.2025.114737","url":null,"abstract":"<div><div>This study explores the use of fly ash (FA), a waste material, to partially replace zinc oxide (ZnO) as an activator in tire tread processing. Reducing ZnO addresses its environmental risks, particularly the impact of ZnO leakage into aquatic ecosystems throughout the tire’s life cycle. The FA was altered by including rubber compound with and without ZnO, using ZnO-to-FA ratios of 3:0 (control), 2:1, 1:2, 0:3, or 0:5 parts per hundred of rubber (phr). The results show that crosslinking of the rubber compound occurred with FA, even in the absence of ZnO. Notably, sample recipes with ZnO-to-FA ratios of 2:1 and 1:2 phr had similar Δ torque values to the control (3:0), allowing for ZnO reductions of 33.7% and 67.0%, respectively. This effectiveness is likely due to metal oxides in FA, such as CaO, MgO, Al<sub>2</sub>O<sub>3</sub>, and Fe<sub>2</sub>O<sub>3</sub>, which support the vulcanization process. Additionally, tensile strength and modulus remained unchanged. Elemental analysis further indicated that a ZnO-to-FA ratio of 1:2 reduced zinc release by 63.0% compared to the control recipe. A gate-to-gate life cycle assessment revealed that replacing ZnO with FA in vulcanized rubber formulations reduces environmental impacts, with the lowest effects observed at the 0:3 ZnO:FA ratio, though higher FA content may increase impacts. Using FA as a partial replacement for ZnO in tire tread processing shows promise for reducing environmental impact in tire manufacturing by lowering zinc release, decreasing ecotoxicity, and promoting waste reduction through the recycling of fly ash.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"200 ","pages":"Article 114737"},"PeriodicalIF":7.1,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Generalization abilities of foundation models in waste classification

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-06 DOI: 10.1016/j.wasman.2025.02.032

Aloïs Babé , Rémi Cuingnet , Mihaela Scuturici , Serge Miguet

{"title":"Generalization abilities of foundation models in waste classification","authors":"Aloïs Babé , Rémi Cuingnet , Mihaela Scuturici , Serge Miguet","doi":"10.1016/j.wasman.2025.02.032","DOIUrl":"10.1016/j.wasman.2025.02.032","url":null,"abstract":"<div><div>Industrial waste classification systems based on computer vision require strong generalization abilities across location and time period in order to be deployed. This study investigates the potential of foundation models, known for their adaptability to a wide range of tasks and promising generalization capabilities, to serve as the basis for such systems. To evaluate the generalization performance of foundation models we use five waste classification datasets spanning various domains, train the models on one dataset and test them on all others. Additionally, we explore various training procedures to optimize foundation model adaptation for this specific domain. Our findings reveal that foundation models exhibit superior generalization abilities compared to standard models and that good generalization performance is correlated with the model size and the size of the model pretraining dataset. Furthermore, we demonstrate that elaborate classifier heads are not necessary for extracting discriminative features from foundation models. Both standard fine-tuning and Parameter-Efficient Fine-tuning (PEFT) improve generalization performance, with PEFT being particularly effective for larger models. Simple data augmentation techniques were found to be ineffective. Overall, application of foundation models to industrial waste classification holds very promising results.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"198 ","pages":"Pages 187-197"},"PeriodicalIF":7.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recovery and recycling of silica fabric from waste printed circuit boards to develop epoxy composite for electrical and thermal insulation applications

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-06 DOI: 10.1016/j.wasman.2025.02.017

E.I. Anjana , K Aiswariya , K.P. Prathish , Sushanta K Sahoo , K Jayasankar

{"title":"Recovery and recycling of silica fabric from waste printed circuit boards to develop epoxy composite for electrical and thermal insulation applications","authors":"E.I. Anjana , K Aiswariya , K.P. Prathish , Sushanta K Sahoo , K Jayasankar","doi":"10.1016/j.wasman.2025.02.017","DOIUrl":"10.1016/j.wasman.2025.02.017","url":null,"abstract":"<div><div>Printed Circuit Boards (PCBs), a primary component of electronic waste (E-waste), contain silica fabric as a major non-metallic material, which needs to be reutilized for high-performance applications. This study focuses on the separation and recovery of silica fabrics through pyrolysis and their subsequent use in developing silica fabric-epoxy composites (SFR). Extracted silica fabric was characterized through FTIR, XRD, XPS, and SEM for morphology analysis. Subsequently, silica fabric was incorporated into epoxy to fabricate a composite with different compositions through a hand lay-up technique to achieve enhanced mechanical, thermal, and dielectric properties. The interface morphology, dielectric constant, mechanical strength, thermal conductivity, and thermal stability of composites were investigated. A strong-fabric matrix interface in composite was observed through micrographs, revealing the stress transfer through the fabric. The composition of silica fabric: epoxy (70:30) showed a high electrical resistance >30000 Ω/m, a high dielectric constant value (ɛ<sub>r</sub>) of 4–5, and ultimate tensile strength (UTS) of 105 MPa. The thermal conductivity of epoxy was reduced from 0.35 to 0.15 W/m K after incorporating the silica fabric. This study introduces a novel method for recycling electronic waste, specifically focusing on PCBs to extract silica fabric (>95 %) through low-temperature pyrolysis (600 ⁰C) to create high-performance silica fabric-epoxy (SFR) composites. These SFR composites are suitable for several applications, including structural components and industry insulation materials such as battery boxes. This sustainable approach addresses e-waste management and enhances composite material performance, highlighting SFR epoxy composites’ versatility and research potential in various applications.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"198 ","pages":"Pages 174-186"},"PeriodicalIF":7.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Increased stability of CuFe2O4 oxygen carriers in biomass combustion by Mg doping

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-06 DOI: 10.1016/j.wasman.2025.02.046

Rafal Lysowski , Ewelina Ksepko , HoWon Ra

{"title":"Increased stability of CuFe2O4 oxygen carriers in biomass combustion by Mg doping","authors":"Rafal Lysowski , Ewelina Ksepko , HoWon Ra","doi":"10.1016/j.wasman.2025.02.046","DOIUrl":"10.1016/j.wasman.2025.02.046","url":null,"abstract":"<div><div>Biomass derived from agricultural waste is a promising source of renewable energy. When used in low-emission combustion technologies such as chemical looping combustion (CLC), it has the potential to achieve net negative CO<sub>2</sub> emissions. In CLC, the fuel is isolated from atmospheric air, resulting in flue gases that comprise mainly CO<sub>2</sub> and H<sub>2</sub>O. Since the fumes are not diluted by atmospheric N<sub>2</sub>, low-cost CO<sub>2</sub> capture is possible. The oxygen required for CLC is delivered entirely by an oxygen carrier (OC). Spinel-type OCs have a high oxygen-transport capacity, mechanical durability, and chemical stability. However, biomass ash is rich in alkali metals and SiO<sub>2</sub>, which adversely affect OCs by promoting cracking and agglomeration. Herein, the effect of Mg doping on the resistance of OCs to biomass ash is explored. Five Mg<em><sub>x</sub></em>Cu<sub>1−</sub><em><sub>x</sub></em>Fe<sub>2</sub>O<sub>3</sub> −type spinels (<em>x</em> = 0–1) are evaluated for the combustion of four types of biomass with varying ash compositions: three agricultural waste products (pine wood, kenaf, and rice husk) and one dedicated energy crop (<em>Miscanthus</em>). Among the tested OCs, Cu<sub>0.5</sub>Mg<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> demonstrates the highest reactivity and conversion rates, with a reaction rate of 2.70 wt.%/min for kenaf and 95.9 % conversion for <em>Miscanthus</em>. Following multiple reaction cycles, undoped and low-Mg OCs (<em>x</em> ≤ 0.5) exhibit cracking and structural degradation, whereas high-Mg OCs (<em>x</em> ≥ 0.75) retain their structural integrity, confirming the benefit of Mg doping on the durability of spinel-type OCs. This study provides insight into the design of more resilient OCs for biomass combustion, which will guide future research on CLC technologies.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"199 ","pages":"Pages 1-12"},"PeriodicalIF":7.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143549383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stepping up to the plate: Leadership and local government waste managers opinions of household food waste interventions

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-06 DOI: 10.1016/j.wasman.2025.02.054

Esther Landells , Olav Muurlink , Gamithri G. Karunasena , Samuel Oakden , Anjum Naweed

{"title":"Stepping up to the plate: Leadership and local government waste managers opinions of household food waste interventions","authors":"Esther Landells , Olav Muurlink , Gamithri G. Karunasena , Samuel Oakden , Anjum Naweed","doi":"10.1016/j.wasman.2025.02.054","DOIUrl":"10.1016/j.wasman.2025.02.054","url":null,"abstract":"<div><div>Landfilling of household food waste contributes to global emissions yet remains prevalent worldwide. Achieving net-zero emissions targets necessitates the diversion of organic waste from landfills, placing considerable pressure on local authorities to provide waste diversion services. However, even where policies, funding, and capacity to implement food waste diversion appears to exist, service inconsistencies abound.</div><div>Many countries have local authority staff responsible for providing waste services and they are key contributors to determining how domestic waste is managed. Using Australia’s diverse geographic and demographic situation as an example, this study examines the decision-making processes and influence of local waste management staff through a national survey (n = 183) and online interviews (n = 45). A novel thematic network analysis approach revealed complex patterns of polarisation surrounding household food waste implementations. Key findings highlighted the interplay between staff attitudes, decision-making, and intervention strategies, emphasising systemic support as critical for transformative change.</div><div>Three overarching concerns emerged: (1) the need for sustained and supportive leadership to normalise food waste management and promote its value as a resource, (2) clearer delineation of responsibilities among stakeholders, and (3) enhanced and consistent funding for waste initiatives. Recommendations include leadership development, comprehensive policy impact assessments, and reliable financial support to strengthen local government operations.</div><div>This study underscores the importance of empowering local authorities to advance organic waste diversion and reduce emissions. Australia’s approach offers actionable strategies that may inform global efforts to address similar challenges.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"198 ","pages":"Pages 161-173"},"PeriodicalIF":7.1,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reducing the climate impact of residual waste treatment: A German case study on carbon management strategies

IF 7.1 2区环境科学与生态学

Waste management Pub Date : 2025-03-05 DOI: 10.1016/j.wasman.2025.02.048

Sarah Schmidt, David Laner

{"title":"Reducing the climate impact of residual waste treatment: A German case study on carbon management strategies","authors":"Sarah Schmidt, David Laner","doi":"10.1016/j.wasman.2025.02.048","DOIUrl":"10.1016/j.wasman.2025.02.048","url":null,"abstract":"<div><div>Climate neutrality goals require adapting the management of fossil carbon in waste management. This study evaluates the effectiveness of two key carbon management strategies addressing greenhouse gas (GHG) emissions from residual waste treatment, namely: pre-sorting residual waste in a material recovery facility to remove recyclable, carbon-rich materials (S_MRF) versus post-treatment of municipal solid waste incineration (MSWI) flue gas through carbon capture and storage (S_MSWI_CCS). Using residual waste management in Kassel, Germany, as a case study, GHG emissions are assessed for current and prospective scenarios, accounting for changes in waste inputs, material and energy systems, substitution choices, and uncertainties in treatment technology data. It is shown that MSWI in Kassel emits 857 kg of CO<sub>2</sub> per t of wet residual waste, with 31 % fossil CO<sub>2</sub>. Carbon management strategies can reduce direct fossil CO<sub>2</sub> emissions by 27 % (S_MRF) or 90 % (S_MSWI_CCS) and increase the net life cycle GHG savings of residual waste management by a factor of 1.6 (S_MRF) or 2.6 (S_MSWI_CCS), respectively. S_MSWI_CCS offers the highest potential to decrease the GHG footprint of residual waste management and is least sensitive to variations in waste composition, energy and material systems, and substitution choices. Discernibly higher net GHG savings of S_MRF compared to S_MSWI_CCS can only be observed if residual waste is rich in recyclables (low separate collection). Overall, this study highlights the utility of refined scenario, uncertainty and discernability analysis in accounting for local conditions and different settings as well as potential future changes to promote environmental decision support on waste management.</div></div>","PeriodicalId":23969,"journal":{"name":"Waste management","volume":"198 ","pages":"Pages 137-150"},"PeriodicalIF":7.1,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0