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Start date: 2020Subject: search.filters.subject.circular economy

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Now showing 1 - 7 of 7
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    Fish By-Products Utilization in Food and Health: Extraction Technologies, Bioactive, and Sustainability Challenges
    (Wiley Periodicals LLC, 2025-11) Waqar M; Sajjad N; Ullah Q; Vasanthkumar SS; Ahmed F; Panpipat W; Aluko RE; Kaur L; Chaijan M; Ageru TA
    Fish by-products, traditionally regarded as waste, are increasingly recognized as valuable sources of bioactive compounds, including peptides, omega-3 fatty acids, collagen, and hydroxyapatite. These molecules exhibit significant functional properties with applications in food preservation, dietary supplementation, pharmaceuticals, and cosmeceuticals. This review explores advanced extraction technologies such as enzyme-assisted hydrolysis, supercritical fluid extraction, and cold plasma processing, which enhance the yield and stability of bioactives while supporting zero-waste and circular economy principles. Despite technological progress, key barriers remain, including inconsistent raw material quality, high processing costs, regulatory uncertainty, and limited industrial infrastructure. Peptides and protein hydrolysates derived from fish frames, skins, viscera, and scales have demonstrated antioxidant, antihypertensive, antimicrobial, antidiabetic activities, but translation into functional food and health products is constrained by scalability and regulatory challenges. Future work should focus on optimizing bioprocessing, validating health benefits through clinical trials, and implementing sustainable valorization frameworks. Addressing these challenges will unlock the full potential of fish by-products in advancing food security and human health.
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    Scientometric Analysis of the Global Scientific Literature on Circularity Indicators in the Construction and Built Environment Sector
    (MDPI (Basel, Switzerland), 2022-12-31) Gomis K; Kahandawa R; Jayasinghe RS; Oladinrin OT; Pathirage C; Olanipekun A
    The circular-economy-related research has exponentially increased in recent years. The literature shows that circularity indicators represent a timely topic that requires an in-depth analysis. However, the trends and gaps in the literature in the area of the circular economy have not need analysed in depth. This study uses a scientometric analysis as the research methodology to examine the current literature on circularity and circular economic indicators. The publications were extracted from the Web of Science and were published until the end of the third quarter of 2022. The scientometric analysis was conducted using VOSviewer software to map the relationships between the 1117 articles selected on the topic. The findings revealed that the most productive author and university were Jorge de Brito and Delft University of Technology in the Netherlands. The overlay visualisation of the keywords identified a notable shift in research themes from dynamics, frameworks, models, and design in previous years to economy, barriers, and strategies in the current research context. The overlay visualisation of the keywords identified trending research hotspots within the current research context. This study is the first holistic and global overview of circularity and circular economic indicators in the construction context and identifies a critical need for further research to understand circularity and circular economic indicators under co-occurrence analysis conditions. This study offers academics, policymakers, and other circularity activists a guide for future research and valuable insight into circularity and circularity indicator themes.
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    Drivers for and barriers to circular economy transition in the textile industry: A developing economy perspective
    (ERP Environment and John Wiley and Sons Ltd, 2024-06-19) Farrukh A; Sajjad A
    Increasingly, pressing sustainability issues including the rise in greenhouse gas (GHG) emission rates, climate change-related vulnerabilities, and natural resource depletion have propelled companies to transition from a linear economy to a circular economy (CE). While circular business models are gaining currency in the manufacturing sector, empirical research on CE transition in the continuous process industry in developing economies is scarce. Accordingly, the purpose of this study is to investigate the drivers and barriers of CE adoption in the textile industry of Pakistan. To this end, we utilized a qualitative methodology, and a total of twenty-two semi-structured interviews were conducted with consultants and senior corporate managers working in the textile sector. Building on the natural resource-based view (NRBV) and institutional theory, the findings revealed various internal drivers (resource efficiency-related, organization-related, and research and innovation-related factors) and external drivers (market, regulatory, and societal factors) for CE transition. Additionally, the findings demonstrated internal barriers including behavioral, technical, and economic issues, and external issues such as customer and brand-related barriers, regulatory and policy-related barriers, as well as supply chain-related barriers hindering the adoption of CE. We argue that it is one of the early studies to utilize the NRBV and institutional theory to examine the drivers and barriers and provide novel insights into the CE transition in the textile process industry in a developing economy. The findings can assist academics, consultants, practitioners, and policymakers to understand and promote CE as a sustainable strategy in the textile process industry.
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    The state of circular economy implementation in the building and construction sector in Aotearoa New Zealand : a thesis presented in partial fulfilment of the requirements for the degree of Master of Environmental Management at Massey University, New Zealand
    (Massey University, 2024) Cossar, Lucy
    The building and construction (B&C) sector is pivotal in achieving a global shift towards a circular economy (CE) and moving away from a linear or 'take-make-dispose' model that drives unsustainable consumption rates and degrades vital ecosystem services. However, little is known about the extent to which B&C businesses implement the CE concept in Aotearoa New Zealand. Therefore, this study assessed the current level of implementation of the CE concept among businesses in Aotearoa New Zealand’s B&C sector. An exploratory sequential mixed-methods research design was utilised, beginning with the synthesis of circular strategies derived from existing literature. Experts representing seven business types (manufacturing, architecture and engineering, construction, design-build, fit-out, demolition, and waste management companies) were interviewed to explore the relevance of circular strategies, informing the development of a survey distributed to professionals from across Aotearoa New Zealand’s B&C sector. Most circular strategies were considered relevant by interviewees and were subsequently included in the survey. Interviewees also suggested that CE implementation is insufficient, inconsistent, uncoordinated, and limited by a narrow focus on recycling, necessitating more education, emphasis on the design phase, and a systemic and collaborative approach. According to the survey responses from 213 professionals, most businesses are at a ‘beginner’ stage of maturity regarding CE implementation, and most circular strategies receive minimal to moderate levels of implementation. Therefore, most circular strategies require greater attention, particularly service-based models, sharing platforms, material passports, remanufacturing, take-back schemes, organic recycling, and regenerating nature. These findings suggest that CE implementation among businesses in Aotearoa New Zealand's B&C sector is still in its early stages. In this context, there is significant potential to increase engagement in circular strategies, especially at the higher levels of the waste hierarchy and 9Rs, to accelerate the shift towards a more sustainable and circular economy.
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    Transitioning towards a circular economy solar energy system in Northern Australia: insights from a multi-level perspective
    (Taylor and Francis Group, 2023-05-04) Mathur D; Gregory R; Imran M
    Increasing resource efficiency and decreasing waste by 2030 through prevention, reduction, recycling and reuse is one of the 17 United Nations Sustainable Development Goals. Australia is predicted to have up to 145,000 t of solar panel waste by 2030 and many large-scale solar systems are proposed to be built across Northern Australia. Research suggests that solar panel consumption and waste patterns are not dissimilar to other forms of e-waste such as mobile phones. Consequently, there is a need to rethink how the end of life of solar panels is managed. In this paper we raise the question of how Northern Australia should plan for managing solar panel waste arising from these huge installations in the future. This paper draws on the multi-level perspective, as a framework for conceptualising the transition challenges associated with promoting a circular solar energy system in the region. Adopting this approach facilitates consideration of social, technical and political drivers of solar panel waste and their implications for governance and planning in regional Australia. It is suggested that planning activities aimed at strategic, tactical and operational levels can help Northern Australia transition into a sustainable regional future. Practitioner pointers: Need to develop planning system/framework/process for waste arising from solar farms. Usefulness of the multi-level perspective for identifying the range of stakeholders, barriers and drivers. Rethinking regional development of Northern Australia through a new industry space between the solar and waste sectors.
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    Exploring shared impact measurement : developing a framework for future action for the Zero Waste Network Aotearoa : a thesis prepared in partial fulfilment of the requirements for the degree of Master of Environmental Management at Massey University, New Zealand
    (Massey University, 2020) Wray, Dorte
    The Zero Waste Network (ZWN) represents community resource recovery enterprises (CREs) working to shift communities towards a circular economy via zero waste education, reuse and recycling activities in Aotearoa New Zealand. The CRE model produces a range of impacts, however there is currently no standardised approach to reporting these. This thesis aims to develop a framework of action towards the implementation of shared impact measurement within the ZWN. It was found that research participants understand and communicate CRE impact in a variety of ways. It is proposed that there are environmental, cultural, social and economic dimensions to CRE impact. These are explored and analytical and reporting tools are presented for each. Aiming to have practical application within the ZWN, this thesis uses an action research approach, involving ZWN members in its design and implementation. Interviews, a survey and focus groups were undertaken, allowing for a variety of qualitative and quantitative data to be collected. These were analysed using coding and basic statistical analysis methods.
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    Broadening the Circle: Creativity, Regeneration and Redistribution in Value Loops
    (Emerald, 31/03/2023) Palakshappa N; Venkateswar S; Ganesh S
    Increasing industrial agriculture and economic crisis has generated creative responses in pursuit of responsible solutions to the human and environmental cost of globalization by applying these models to promote social responsibility, help sustain livelihoods and foster biodiversity. A key issue concerns how responsible and circular businesses might provide appropriate responses to large-scale ‘wicked’ problems. This paper asks what such creativity looks like in the context of a circular economy that attempts to build closed value loops, by examining a case from the organic cotton textile industry: Appachi Eco-Logic. We use an ethnographic extended-case approach to identify two phases of creative growth at Appachi Eco-Logic, examining how closing the value loop and creating circularity involved broadening the circle to include more and more actors. We identify two major challenges to achieving and maintaining full circularity before concluding with a broad provocation for the study of circular economies.