Circular Economy最新文献

{"title":"The biofactories: Quantifying environmental benefits of the wastewater circular economy in Chile using life cycle assessment","authors":"","doi":"10.1016/j.cec.2024.100091","DOIUrl":"10.1016/j.cec.2024.100091","url":null,"abstract":"<div><p>The wastewater circular economy promises improved environmental impacts within the food-water-energy nexus. This requires verification as the global sanitation sectors seek to improve environmental impacts and achieve integrated water management. Life cycle assessment (LCA) has been used to compare novel technologies for wastewater treatment and recovery, but research addressing plant-wide improvements of co-product resource recovery using real data from full-scale plants is still needed, particularly in a Latin American context. In Chile, two wastewater treatment plants (WWTPs) have embraced the circular economy configuration, recovering treated effluent, biosolids, and biogas, in addition to implementing advanced nitrogen removal using different technologies. The LCA of these two WWTPs demonstrated that Plant A improved 8 out of 10 impact categories compared to the baseline conventional scenario, while Plant B improved 5 categories out of 10. The analysis of the two plants showed the influence of influent quality on environmental impacts and the trade-off that occurs between the different technologies implemented. Plant B generated larger environmental credits through increased biogas and biosolids recovery due to thermal hydrolysis pre-treatment and anaerobic digestion, combined with cogeneration of heat and power. Plant A implemented water recovery, which provided benefits on a smaller magnitude but to more impact categories. Therefore, both plants improved environmental impacts through the wastewater circular economy, but further improvements in system configurations are recommended in each.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 3","pages":"Article 100091"},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000190/pdfft?md5=f1c627d85fb6e627eb411bd17fe5b167&pid=1-s2.0-S2773167724000190-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141397333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rethinking Regional Embeddedness and Innovation Systems for Transitions Towards Just, Responsible, and Circular Bioeconomies","authors":"Michael P. Schlaile, Jonathan Friedrich, J. Zscheischler","doi":"10.55845/dtfi9420","DOIUrl":"https://doi.org/10.55845/dtfi9420","url":null,"abstract":"Few studies have explicitly explored regional embeddedness and both the inconsistencies and injustices of circular bioeconomy (CBE) innovations. To better navigate the normative dimension of these innovations and CBE transitions in general, our article presents a threefold argument for the relevance of the regional level of analysis. First, CBE innovations are influenced by and affect regional metabolisms and actor constellations, assets, and (biophysical) resources within regional innovation systems (RIS). Second, thoroughly exploring these dimensions of regional (un)embeddedness can reveal ethical concerns, including potential \"dark sides\" and injustices, such as exclusivity and exploitation. Third, to address these concerns in CBE research and governance, we outline four facets: complementing the RIS as a framework and policy approach, balancing creative and destructive measures, addressing the need for more inclusive regional CBE policies, and establishing dedicated intermediaries to better govern regional CBE transitions. In summary, this conceptual article provides starting points for further research and proactive measures that help govern the normative dimension and the design of CBE transitions at the regional level, promoting inclusivity, justice, responsibility, and legitimacy for both innovation and exnovation.","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"9 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141234005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From science-policy interface to science-policy panel: The United Nations’ strengthening of the sustainable life cycle management of chemicals","authors":"Qiaoyun Zhang ,&nbsp;Hairong Zhao ,&nbsp;Yuan Chen","doi":"10.1016/j.cec.2024.100090","DOIUrl":"https://doi.org/10.1016/j.cec.2024.100090","url":null,"abstract":"<div><p>In recent years, the chemical production and waste generation have been rapidly increasing, presenting substantial hazards to the ecosystem and human well-being. To address this issue, a series of multilateral environmental agreements (MEAs) have been developed internationally, that provide essential decision-making support for the appropriate governance of chemicals and wastes in the participating countries. MEAs have established subsidiary bodies known as science-policy interface (SPI) institutions to provide evidence-based support and scientific assessments for environmental policies. However, the existing SPIs face limitations that hinder their ability to tackle the obstacles presented by the vast quantities of chemicals and wastes currently found in the environment. Therefore, the fifth session of the United Nations Environment Assembly made the decision to establish a science-policy panel to promote the effective management of chemicals and waste and to prevent pollution (SPP-CWP). This panel is intended to be an independent intergovernmental body, similar to the Intergovernmental Panel on Climate Change and Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services. The United Nations Environment Programme convened an ad hoc open-ended working group (OEWG) to design strategies for the SPP-CWP. Since 2022, three OEWG meetings have been conducted, and draft documents outlining the panel's scope, functions, operational principles, conflict of interest policy, institutional setup, work processes, and procedures have been formulated. In this article, we analyzed the background and development of the SPP-CWP and provided updates regarding the progress of the panel's establishment. We also suggested future trends for the SPP-CWP. We concluded that SPP-CWP will be a comprehensive and authoritative international body, providing policymakers with exhaustive reports, consequently strengthening the capacity of life cycle management of chemicals. Thus, the panel will effectively reduce or prevent waste production and pollution, promote material circulation, and minimize resource consumption, making significant contributions to the establishment of a circular economy and an environmentally friendly society.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 2","pages":"Article 100090"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000189/pdfft?md5=1129a35af79892fc7d10a6cc9e702521&pid=1-s2.0-S2773167724000189-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applications of machine learning tools for biological treatment of organic wastes: Perspectives and challenges","authors":"Long Chen ,&nbsp;Pinjing He ,&nbsp;Hua Zhang ,&nbsp;Wei Peng ,&nbsp;Junjie Qiu ,&nbsp;Fan Lü","doi":"10.1016/j.cec.2024.100088","DOIUrl":"https://doi.org/10.1016/j.cec.2024.100088","url":null,"abstract":"<div><p>Biological treatment technologies (such as anaerobic digestion, composting, and insect farming) have been extensively employed to handle various degradable organic wastes. However, the inherent complexity and instability of biological treatment processes adversely affect the production of renewable energy and nutrient-rich products. To ensure stable processes and consistent product quality, researchers have invested heavily in control strategies for biological treatment, with machine learning (ML) recently proving effective in optimizing treatment, predicting parameters, detecting disturbances, and enabling real-time monitoring. This review critically assesses the application of ML in biological treatment, providing an in-depth evaluation of key algorithms. This study reveals that artificial neural networks, tree-based models, support vector machines, and genetic algorithms are the leading algorithms in biological treatment. A thorough investigation of the applications of ML in anaerobic digestion, composting, and insect farming underscores its remarkable capacity to predict products, optimize processes, perform real-time monitoring, and mitigate pollution emissions. Furthermore, this review outlines the challenges and prospects encountered in applying ML to biological treatment, highlighting crucial directions for future research in this area.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 2","pages":"Article 100088"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000165/pdfft?md5=7fe1b903735e4e0257707a55780cac4d&pid=1-s2.0-S2773167724000165-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141435124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent progress and hurdles in cathode recycling for Li-ion batteries","authors":"Ponraj Jenis ,&nbsp;Ting Zhang ,&nbsp;Brindha Ramasubramanian ,&nbsp;Sen Lin ,&nbsp;Prasada Rao Rayavarapu ,&nbsp;Jianguo Yu ,&nbsp;Seeram Ramakrishna","doi":"10.1016/j.cec.2024.100087","DOIUrl":"https://doi.org/10.1016/j.cec.2024.100087","url":null,"abstract":"<div><p>This review focuses on standard Li recycling approaches for LiFePO₄ (LFP) and nickel−cobalt−manganese (NCM) cathodes. The study discusses about advances in leaching agents, including organic acid, alkaline solutions, natural organic acid, and electrochemical treatments. Emphasis is placed on the significance of selective Li leaching strategies to optimize the recycling of waste batteries. The review also outlines potential future research directions for enhancing selective recycling, providing valuable insights into the recycling of LFP and NCM batteries. Simultaneously, the article addresses the challenges associated with the transition from conventional lithium-ion batteries to all-solid-state batteries (ASSBs) in the pursuit of sustainable energy storage technologies. It highlights key points, including the challenges in developing ASSBs, the role of employing various material combinations and its preparation techniques, adopting scalable solution-based processes for commercialization, and strategies for sustainable ASSB recycling. The proposition of a fully recyclable ASSB model underscores the commitment to lower recycling costs using safer and simpler methods, positioning nanotechnology as an enabling tool for achieving advancements in materials and cell-level performance.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 2","pages":"Article 100087"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000153/pdfft?md5=3bde72603f61f39850df5615c97ebbd4&pid=1-s2.0-S2773167724000153-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141438791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trash or treasure? A circular business model of recycling plasmix","authors":"Federico Zilia ,&nbsp;Francesca Gaia Andreottola ,&nbsp;Luigi Orsi ,&nbsp;Marco Parolini ,&nbsp;Jacopo Bacenetti","doi":"10.1016/j.cec.2024.100089","DOIUrl":"10.1016/j.cec.2024.100089","url":null,"abstract":"<div><p>The production of plastic materials in the mid-20th century brought about transformative changes in consumer goods manufacturing and societal norms. However, this advancement paralleled an alarming surge in plastic pollution, driven by unrestrained consumption. This study focuses on the non-homogeneous and non-recyclable plastic waste (also known as plasmix in the Italian waste management), a residual blend resulting from plastic recycling processes. The main goals are to conduct an in-depth study of the plasmix landscape, to identify integration challenges, and to create a sustainable business model for broader adoption. Additionally, we aim to use life cycle assessment to examine the environmental effects of semi-finished plasmix-based materials that can be used to produce different products. This integrated approach ensures a holistic understanding of plasmix recycling, promoting both economic and environmental sustainability. The study contributes to sustainable waste management practices by offering a strategic approach to transform a challenging waste stream into economic opportunities. By addressing the market viability of plasmix-based products through an empirically supported business model, the research underscores the significance of recycling in mitigating plastic pollution and advancing a circular economy.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 2","pages":"Article 100089"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000177/pdfft?md5=0fbfcd168cd7be0d1ed2a31c94dc8c46&pid=1-s2.0-S2773167724000177-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141277948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reveal dynamic flows of regional e-waste: Evidence from a field research","authors":"Chonggang Yang ,&nbsp;Bingyu Xu ,&nbsp;Zhikun Zhu ,&nbsp;Yan He ,&nbsp;Yujia Wang ,&nbsp;He Xu ,&nbsp;Mo Zhang","doi":"10.1016/j.cec.2024.100086","DOIUrl":"10.1016/j.cec.2024.100086","url":null,"abstract":"<div><p>Electronic waste (e-waste) has increased because of the rapid replacement of electrical and electronic equipment. Owing to the increased emphasis on the dual properties of environmental contamination and metal resources, accurate identification of the e-waste recycling process is crucial. In this study, a product-level material flow analysis (MFA) is performed from a macroscopic social flow of waste TV sets in order to demonstrate the material metabolism of regional e-waste recycling. Previous studies have focused on the estimation of the quantity of e-waste generated or analyzing the overall amount of recycled resource output, the results derived from the estimation may have some unreliability, and our bottom-up research investigates the material flows that occur between the generation, collection and recycling of e-waste. MFA based on questionnaires and field research present accurate quantities and proportions of the recycling process. The results reveal that accelerating the construction of regional e-waste recycling systems and data networks and accurately identifying e-waste source, flow, and destination are required in order to improve resource efficiency toward carbon neutrality.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 2","pages":"Article 100086"},"PeriodicalIF":0.0,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000141/pdfft?md5=322c2394db4587f79a994c571c6e90e2&pid=1-s2.0-S2773167724000141-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141053222","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extended producer responsibility to enable an inclusive circular economy","authors":"Xin Tong,&nbsp;Jingwei Wang","doi":"10.1016/j.cec.2024.100074","DOIUrl":"10.1016/j.cec.2024.100074","url":null,"abstract":"","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 1","pages":"Article 100074"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000025/pdfft?md5=357bad43186654f5132f98bf897efdf2&pid=1-s2.0-S2773167724000025-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139823134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards sustainable construction waste management: Study on a disassemblable brick partition wall for the architecture, construction, and engineering industry","authors":"Yi Xu,&nbsp;Shujie Liu,&nbsp;Felix Heisel","doi":"10.1016/j.cec.2024.100078","DOIUrl":"10.1016/j.cec.2024.100078","url":null,"abstract":"<div><p>This study proposes an approach to combat construction waste in the architecture, construction, and engineering (ACE) industry by developing a disassemblable brick partition wall. Brick reuse is severely restricted by the presence of mortar; innovative approaches need to be explored. An existing strategy, utilizing mortarless interlocking, relies on non-standardized bricks. It is worth noting that these methods are not specifically created for disassembly, despite the fact that they theoretically could be. A relatively innovative technique for tightening and stabilizing brick units emerged in recent years, involving the utilization of metal components. Despite its potential, there are limited case studies of this approach. By drawing on two typical examples of pros and cons, MIFA 1862 and the UMAR Unit, we propose a new strategy and examine it from multiple perspectives. The findings of the analysis demonstrate how adaptable and versatile the proposed system is, allowing it to be modified into a variety of sizes and forms. Additionally, the system has proven to have considerable advantages in terms of construction speed, and energy efficiency throughout the structure's service time and in future use phases.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 1","pages":"Article 100078"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000062/pdfft?md5=ad076d60a1655b776f58c530ce3c6131&pid=1-s2.0-S2773167724000062-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140086576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploration and practice of “zero-waste city” in China","authors":"Shiyue Qi,&nbsp;Ying Chen,&nbsp;Xuexue Wang,&nbsp;Yang Yang,&nbsp;Jingjie Teng,&nbsp;Yongming Wang","doi":"10.1016/j.cec.2024.100079","DOIUrl":"10.1016/j.cec.2024.100079","url":null,"abstract":"<div><p>The ever-increasing rise in the generation of solid waste has become a global environmental issue. Many cities around the world have adopted zero-waste strategies, policies, and plans to achieve zero-waste goals. China puts great importance to solid waste management and has implemented a zero-waste city pilot program in 11 cities and 5 special areas. During the 14th Five-Year Plan period, China will promote the construction of “zero-waste city” in 113 cities and 8 special areas. This study introduces the exploration and practice of a zero-waste city in China, including the concept of a zero-waste city, the top-level design for constructing such cities, and the effectiveness of pilot programs. The top-level design of zero-waste city construction in China was explained, including the overall thinking, stage goal, main path, overall structural framework, and promotion method. This study also elaborates on the progress and achievements of zero-waste city construction, summarizing the reform measures in terms of legal processes, policy tools for goal-oriented guidance, and high-level promotion and overall planning. The construction of a zero-waste city is a powerful tool for deepening comprehensive solid waste management reform and is an important initiative for ecological civilization construction.</p></div>","PeriodicalId":100245,"journal":{"name":"Circular Economy","volume":"3 1","pages":"Article 100079"},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773167724000074/pdfft?md5=04389c7c614c2d98a840f7e916d1ea03&pid=1-s2.0-S2773167724000074-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140086106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}