Cleaner and Circular Bioeconomy最新文献

{"title":"Investigation of the mechanical and thermal behaviour of CS/HDPE biocomposites based on processing techniques","authors":"Lucky Ogheneakpobo Ejeta","doi":"10.1016/j.clcb.2024.100078","DOIUrl":"https://doi.org/10.1016/j.clcb.2024.100078","url":null,"abstract":"<div><p>In an attempt to produce sustainable materials with improved performance suitable for use in the built environment, the effects of processing techniques on the mechanical and thermal properties of cotton stalk flour polymer composites were investigated. The results reveal that all the injection-molded samples exhibited higher tensile and flexural strength than the compression-molded sample. Also, the injection molded samples filled with 30 wt% and 40 wt% of cotton stalk flour have higher tensile and flexural modulus than the compression molded sample with the 50 wt% filler loading. The notched impact strength of all the injection-molded samples was found to be greater than that of the compression-molded sample. The thermal stability of the compression-molded sample- was seen to be higher than that of the injection-molded samples. The SEM analysis of the compression molded notched impact fractured samples shows a rapid growth of crack propagation owing to poor interfacial bonding. The study demonstrates that the injection molding technique is a better option for producing biocomposites from cotton stalk flour of particle size distribution 425 μm to &lt;53 μm and recycled high-density polyethylene (HDPE) with improved mechanical performance intended for decking and flooring applications.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"8 ","pages":"Article 100078"},"PeriodicalIF":0.0,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801324000071/pdfft?md5=7c913e8b704053f629edbff1e9170836&pid=1-s2.0-S2772801324000071-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140138178","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":"Economic flexibilities and opportunities for sugar cane plants: A real options valuation case","authors":"Igor Gimenes Cesca ,&nbsp;Fernando Antonio Slaibe Postali ,&nbsp;Virginia Parente","doi":"10.1016/j.clcb.2024.100074","DOIUrl":"10.1016/j.clcb.2024.100074","url":null,"abstract":"<div><p>The goal of this paper is to investigate the effect of production flexibility in decision making in a sugar cane plant under the Real Options theory approach. It was considered a sugar cane plant with the option to switch output and with the option to temporary shutdown. Under these conditions, we sought to quantify the marginal effect of such flexibilities on the decision-making. The methodology employs Monte Carlo simulations to estimate the effect of options in the investment's value. The results obtained indicate that decision-making models with flexibilities can increase the expected value of the Net Present Value by up to 88.14 % and reduce the risk of Net Present Value being negative, especially when considering the temporary shutdown option. Finally, this paper proposes that flexibilities bring greater returns to sugar cane plants, allowing to mitigate the effects of crises in the sector.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 ","pages":"Article 100074"},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801324000034/pdfft?md5=cd61d89179234a8dacb2c451b99fca61&pid=1-s2.0-S2772801324000034-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139888141","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":"Environmental impact of conventional vs. organic apples: A life cycle assessment of Washington state's exports to Mexico City","authors":"Morales Brizard Magdalena ,&nbsp;Rivera-Huerta Adriana ,&nbsp;Güereca Leonor Patricia ,&nbsp;Padilla-Rivera Alejandro","doi":"10.1016/j.clcb.2024.100076","DOIUrl":"10.1016/j.clcb.2024.100076","url":null,"abstract":"<div><p>In recent decades, global agriculture has been dominated by conventional practices associated with negative impacts such as the loss of biodiversity, changes in land use, habitat degradation and pollution. Faced with the urgent need of a sustainable shift, the organic scheme has emerged as an alternative to minimize agriculture's environmental footprint, requiring an assessment of the real impacts of both production methods. By means of a Life Cycle Assessment (LCA), the aim of this research is to evaluate the environmental impacts of conventional and organic apples with a cradle to grave approach. Apples grown in Washington state and consumed in Mexico City are considered as a case study and analyzed through seventeen impact categories. The results highlight five main findings. First, pesticides are identified as the main source of toxicity in the conventional model, underlining the relevance of biological pest control. Although the organic model does use authorized pesticides, these did not represent a significant impact. Second, the use of cardboard boxes for packaging implies changes in agricultural land occupation, as well as the use of plastic bags that impacts climate change, calling for no-waste or reduced packaging. Third, transportation is a key contributor to fossil depletion and climate change, noting the importance local production. Fourth, the final disposal of apples residues in landfills has implications for eutrophication, bringing out the importance of composting residues. Fifth, conventional apple production has a higher environmental footprint in most impact categories when compared to organic production for both surface-based and mass-based functional units. As such, this study recommends the production and consumption of local and in-season organic apples to reduce the negative environmental impacts and the effects on human health.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 ","pages":"Article 100076"},"PeriodicalIF":0.0,"publicationDate":"2024-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801324000058/pdfft?md5=ced00b7e9a704489be1ec51f017d78fd&pid=1-s2.0-S2772801324000058-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139826056","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":"How do sustainability policies emerge in the Colombian political system? A Kaleidoscope Model Analysis of the Policy for Sustainable Cattle 2022–2050","authors":"Manuel Francisco Díaz Baca ,&nbsp;Leonardo Moreno Lerma ,&nbsp;Stefan Burkart","doi":"10.1016/j.clcb.2024.100075","DOIUrl":"https://doi.org/10.1016/j.clcb.2024.100075","url":null,"abstract":"<div><p>Environmental concerns such as deforestation, loss of biodiversity, and greenhouse gas emissions have reached preoccupying levels globally, for which the governments of different countries have committed to mitigation actions. In Colombia, one of the most ambitious initiatives to contribute to the commitments is the Policy for Sustainable Cattle 2022–2050 (<em>Política para la Ganadería Bovina Sostenible 2022–2050</em>), whose purpose is to promote the transition from traditional cattle farming to sustainable production systems and value chains. This study analyzes the construction process of the policy and determines the factors that allowed the change in public policies towards more sustainability. For this, a documentary analysis is carried out with a qualitative-descriptive approach consulting primary and secondary sources. As a theoretical framework, the Kaleidoscope Model of Policy Change is used, emphasizing on the first three stages, namely a) Agenda Setting, b) Design, and c) Adoption, and delving into the fourth stage of Implementation. The results reveal that multiple factors allowed the development of the policy, such as the need to face the environmental crisis, international summits that highlighted the problem, previous policies and, in general, an accumulation of experiences and knowledge. It became also evident that the main challenges for this policy have been the lack of coordination among the different national governments, as had its own vision of sustainability, in addition to the complexity of coordinating sustainability and competitiveness criteria among the ministries. It is concluded that although the development of the policy is a first step in the transition to sustainability, there are still many challenges ahead for change to be expressed in concrete actions.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 ","pages":"Article 100075"},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801324000046/pdfft?md5=74e77f738aac23d530c0bcefdaf45d27&pid=1-s2.0-S2772801324000046-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139719572","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":"Identifying feed characteristics that affect the pellet manufacturing of livestock diets containing different coproducts","authors":"T.M.M. Bastiaansen ,&nbsp;S. de Vries ,&nbsp;B.M.J. Martens ,&nbsp;R.T. Benders ,&nbsp;E. Vissers ,&nbsp;J.A. Dijksman ,&nbsp;W.H. Hendriks ,&nbsp;M. Thomas ,&nbsp;G. Bosch","doi":"10.1016/j.clcb.2024.100073","DOIUrl":"10.1016/j.clcb.2024.100073","url":null,"abstract":"<div><p>As part of the transition to circular agriculture and to reduce food-feed competition for arable land, the inclusion of coproducts in livestock feed is expected to increase. Pellet manufacturing allows for improving the handling properties of livestock feed, but the effect of fibrous coproducts on the process is poorly understood. Inclusion of coproducts is considered to affect the physicochemical characteristics of a feed mash, and subsequently pellet manufacturing. To understand how coproducts can effectively be incorporated in pellet manufacturing, we investigated the effect of the inclusion of 300 g/kg of various fibrous coproducts, differing in fibrous composition, in feed mash containing 700 g/kg of basic mash, containing soybean meal, maize and soy oil, on mash physicochemical properties and pellet manufacturing. Treatment mashes were prepared in singleton, steam-conditioned and compacted using a ring-die pelletizer. Physical pellet quality, production capacity, and energy consumption of the pellet press were evaluated per treatment mash. Mash physicochemical properties were evaluated by determining hydration properties (i.e. water binding capacity and sorption analyses) and thermomechanical properties (i.e. phase transition and capillary rheometric analysis). Pellet durability varied among treatments (15.8–91.1 %), as did total energy costs of compaction (28.0–38.7 kWh/tonne). Principal component analysis indicated that higher levels of insoluble fibre in a feed mash associated with increased shear stress during capillary rheometric analysis. Combinedly these parameters reduced production capacity (<em>R² =</em> 0.25; <em>P</em> <em>=</em> 0.046) and increased required energy consumption by the pellet press (<em>R² =</em> 0.30; <em>P</em> <em>=</em> 0.03), but could only limitedly explain variation among treatments. In conclusion, the inclusion of coproducts with higher or lower levels of fibre did not consistently affect physical pellet quality. The overall low pellet durability (&lt;90%) of all treatments, however, illustrates the challenge for the pellet manufacturing of diets containing fibrous coproducts. In addition the effects on energy costs of production should be considered during feed formulation.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 ","pages":"Article 100073"},"PeriodicalIF":0.0,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801324000022/pdfft?md5=1a30b385823d15f89ee8569d693ca868&pid=1-s2.0-S2772801324000022-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139825998","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":"Identifying feed characteristics that affect the pellet manufacturing of livestock diets containing different coproducts","authors":"Thomas Bastiaansen, S. de Vries, B.M.J. Martens, R. Benders, E. Vissers, J.A. Dijksman, W. H. Hendriks, M. Thomas, G. Bosch","doi":"10.1016/j.clcb.2024.100073","DOIUrl":"https://doi.org/10.1016/j.clcb.2024.100073","url":null,"abstract":"","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139885752","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":"Environmental Impact of Conventional vs. Organic Apples: A Life Cycle Assessment of Washington State's Exports to Mexico City","authors":"Morales Brizard Magdalena, Rivera-Huerta Adriana, Güereca Leonor Patricia, Padilla-Rivera Alejandro","doi":"10.1016/j.clcb.2024.100076","DOIUrl":"https://doi.org/10.1016/j.clcb.2024.100076","url":null,"abstract":"","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139885984","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":"Economic Flexibilities and Opportunities for Sugar Cane Plants: a Real Options Valuation Case","authors":"Igor Gimenes Cesca, F. Postali, Virginia Parente","doi":"10.1016/j.clcb.2024.100074","DOIUrl":"https://doi.org/10.1016/j.clcb.2024.100074","url":null,"abstract":"","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"40 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139828313","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":"Monitoring the bioeconomy: value chains under the framework of life cycle assessment indicators","authors":"Sara Lago-Olveira ,&nbsp;Ana Arias ,&nbsp;Ricardo Rebolledo-Leiva,&nbsp;Gumersindo Feijoo,&nbsp;Sara González-García,&nbsp;Maria Teresa Moreira","doi":"10.1016/j.clcb.2024.100072","DOIUrl":"10.1016/j.clcb.2024.100072","url":null,"abstract":"<div><p>The transition towards a more environmentally friendly economy can be facilitated through the bioeconomy, which relies on the use of biological resources, processes and methods to provide goods and services. However, bio-based value chains are not inherently sustainable and require careful monitoring and assessment of their impacts across all dimensions of sustainability (environmental, economic and social). Quantifying and understanding these impacts require the use of robust frameworks and methodological approaches that are currently lacking, which could be considered a gap in achieving a more sustainable bioeconomy. In this context, the objective of this research report is to fill this gap by identifying and selecting the most appropriate environmental, social and economic indicators within the Life Cycle Assessment (LCA) methodology to ensure a comprehensive assessment of environmental and socio-economic constraints and an effective analysis of bio-based value chains at all stages of the life cycle, from raw material extraction to end-of-life management. A total of 17, 26 and 101 indicators were identified for the environmental, economic and social pillars, respectively. In addition, existing gaps were highlighted, and a future framework was outlined to refine and enrich the currently available indicators and the underlying methodology.</p><p>The indicators provided constitute a building block for effectively exploring and assessing the sustainability of bio-based value chains by a wide range of stakeholders (e.g., policy makers, entrepreneurs, certification bodies) to facilitate informed decision-making, pave the way for balanced economic growth, improve social welfare and environmental protection, and overall promote more sustainable and resilient bio-based value chains.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 ","pages":"Article 100072"},"PeriodicalIF":0.0,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801324000010/pdfft?md5=79313973a4ab3973e1ef9610b7973d8d&pid=1-s2.0-S2772801324000010-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139637936","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":"Enterprise development through networks: a case study of PETRECOZIM and the beverages sector networks in Zimbabwe","authors":"Tawanda Collins Muzamwese,&nbsp;Michiel A. Heldeweg,&nbsp;Laura Franco-Garcia","doi":"10.1016/j.clcb.2023.100071","DOIUrl":"https://doi.org/10.1016/j.clcb.2023.100071","url":null,"abstract":"<div><p>Inter-organisational networks contribute towards attainment of a Circular Economy (CE). Through effective collaboration, enterprise development can be achieved. In Zimbabwe, plastic waste, mainly PET is a major challenge in the quest for attaining sustainable development of the country. This research focuses on the role of collaboration between bottlers, manufacturers and brand owners in facilitating enterprise development in the context of waste recycling. A case study research design was undertaken of a PET Recycling Company commonly known as PETRECOZIM, which is located on the southern part of Harare, the capital city of Zimbabwe. Interviews were undertaken with key informants and experts in the field of waste management. Document review was carried out on key documentation from the recycling centre in order to assess activities, business models, barriers, challenges, opportunities and core aspects of the operations of PETRECOZIM. The research concludes that organisations can collaborate as private sector players in a particular economic sector such as beverages, manufacturing and brand owners; to form enterprises that can thrive and undertake recycling activities. The research concludes that networks can facilitate enterprise development and self-regulation. It can also be concluded that in certain contexts, networks can operate without external interference and yield significant benefits in circular economy thematic areas such as waste management. The research also concludes that the business model of recycling networks requires blended financing models beyond network partners of one sector, to ensure sustainability. Key barriers identified include lack of participation in the network by organisations which operate in the bottling sector, but are not part of the PETRECOZIM initiative. These firms also lack technical capacity for advanced PET recycling as well as lack of financing to complete recycling stages beyond bales and flakes. The research also concludes that in order to attain circularity and <em>“close the loop”,</em> PETRECOZIM should recycle the waste further into usable products. The Case study also concludes that, without the support of the network members who finance the enterprise PETRECOZIM, its survival is not guaranteed beyond the network. It is recommended that, networks develop models which are sustainable beyond network support, in order to ensure long-term viability.</p></div>","PeriodicalId":100250,"journal":{"name":"Cleaner and Circular Bioeconomy","volume":"7 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772801323000362/pdfft?md5=5d8470cbe66a7e8e84ffe62490b61ee2&pid=1-s2.0-S2772801323000362-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139109230","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}