scholarly journals Case studies of Statistical Entropy Analysis in Recycling Processes: A tool in Support of a Circular Economy

2021 ◽  
Author(s):  
Rodrigo Serna-Guerrero ◽  
Omar Velazquez Martinez ◽  
Annukka Santasalo-Aarnio ◽  
Markus Reuter
Keyword(s):  
Case Studies ◽  
Circular Economy ◽  
Entropy Analysis ◽  
Statistical Entropy

scholarly journals Extending Multilevel Statistical Entropy Analysis towards Plastic Recyclability Prediction

2021 ◽  
Vol 13 (6) ◽  
pp. 3553
Author(s):  
Philippe Nimmegeers ◽  
Alexej Parchomenko ◽  
Paul De Meulenaere ◽  
Dagmar R. D’hooge ◽  
Paul H. M. Van Steenberge ◽  
...  
Keyword(s):  
Circular Economy ◽  
Real Life ◽  
Plastic Waste ◽  
Entropy Analysis ◽  
Waste Collection ◽  
Statistical Entropy ◽  
Waste Streams ◽  
Material Component ◽  
Future Work

Multilevel statistical entropy analysis (SEA) is a method that has been recently proposed to evaluate circular economy strategies on the material, component and product levels to identify critical stages of resource and functionality losses. However, the comparison of technological alternatives may be difficult, and equal entropies do not necessarily correspond with equal recyclability. A coupling with energy consumption aspects is strongly recommended but largely lacking. The aim of this paper is to improve the multilevel SEA method to reliably assess the recyclability of plastics. Therefore, the multilevel SEA method is first applied to a conceptual case study of a fictitious bag filled with plastics, and the possibilities and limitations of the method are highlighted. Subsequently, it is proposed to extend the method with the computation of the relative decomposition energies of components and products. Finally, two recyclability metrics are proposed. A plastic waste collection bag filled with plastic bottles is used as a case study to illustrate the potential of the developed extended multilevel SEA method. The proposed extension allows us to estimate the recyclability of plastics. In future work, this method will be refined and other potential extensions will be studied together with applications to real-life plastic products and plastic waste streams.

scholarly journals Statistical entropy analysis as tool for circular economy: Proof of concept by optimizing a lithium-ion battery waste sieving system

2019 ◽  
Vol 212 ◽  
pp. 1568-1579 ◽  
Author(s):  
O. Velázquez Martínez ◽  
K.G. Van Den Boogaart ◽  
M. Lundström ◽  
A. Santasalo-Aarnio ◽  
M. Reuter ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Circular Economy ◽  
Lithium Ion ◽  
Proof Of Concept ◽  
Entropy Analysis ◽  
Statistical Entropy

Evaluation of the resource effectiveness of circular economy strategies through multilevel Statistical Entropy Analysis

2020 ◽  
Vol 161 ◽  
pp. 104925
Author(s):  
Alexej Parchomenko ◽  
Dirk Nelen ◽  
Jeroen Gillabel ◽  
Karl C. Vrancken ◽  
Helmut Rechberger
Keyword(s):  
Circular Economy ◽  
Entropy Analysis ◽  
Statistical Entropy

scholarly journals The Key Strategies to Implement Circular Economy in Building Projects—A Case Study of Taiwan

2021 ◽  
Vol 13 (2) ◽  
pp. 754
Author(s):  
H.-Ping Tserng ◽  
Cheng-Mo Chou ◽  
Yun-Tsui Chang
Keyword(s):  
Case Studies ◽  
Circular Economy ◽  
Building Industry ◽  
Structured Interviews ◽  
Pilot Projects ◽  
Building Projects ◽  
The World ◽  
Project Phases ◽  
Future Project

The building industry is blamed for consuming enormous natural resources and creating massive solid waste worldwide. In response to this, the concept of circular economy (CE) has gained much attention in the sector in recent years. Many pilot building projects that implemented CE concepts started to appear around the world, including Taiwan. However, compared with the pilot projects in the Netherlands, which are regarded as the pioneer ones by international society, many CE-related practices are not implemented in pilot cases in Taiwan. To assist future project stakeholders to recognize what the key CE-related practices are and how they could be implemented in their building projects in Taiwan, this study has conducted a series of case studies of Dutch and Taiwanese pilot projects and semi-structured interviews with key project stakeholders of Taiwanese pilot projects. Thirty key CE-related practices are identified via case studies, along with their related 5R principles (Rethink, Reduce, Reuse, Repair, Recycle) and project phases. Suggestion on CE-related practices, their 5R principles, project items, and phases to implement in building projects in Taiwan is also proposed while discussion on differences between two countries’ pilot projects is presented.

scholarly journals A Framework for Implementing and Tracking Circular Economy in Cities: The Case of Porto

2019 ◽  
Vol 11 (6) ◽  
pp. 1813 ◽  
Author(s):  
António Cavaleiro de Ferreira ◽  
Francesco Fuso-Nerini
Keyword(s):  
Economic System ◽  
Case Studies ◽  
Circular Economy ◽  
Research Gaps ◽  
Meso Level ◽  
Population Research ◽  
Key Concepts ◽  
Significant Barrier ◽  
The City

Circular economy (CE) is an emerging concept that contrasts the linear economic system. This concept is particularly relevant for cities, currently hosting approximately 50% of the world’s population. Research gaps in the analysis and implementation of circular economy in cities are a significant barrier to its implementation. This paper presents a multi-sectorial and macro-meso level framework to monitor (and set goals for) circular economy implementation in cities. Based on literature and case studies, it encompasses CE key concepts, such as flexibility, modularity, and transparency. It is structured to include all sectors in which circular economy could be adopted in a city. The framework is then tested in Porto, Portugal, monitoring the circularity of the city and considering its different sectors.

A recycling process for thermoelectric devices developed with the support of statistical entropy analysis

2020 ◽  
Vol 159 ◽  
pp. 104843
Author(s):  
O. Velázquez-Martinez ◽  
A. Kontomichalou ◽  
A. Santasalo-Aarnio ◽  
M. Reuter ◽  
A.J. Karttunen ◽  
...  
Keyword(s):  
Entropy Analysis ◽  
Statistical Entropy ◽  
Thermoelectric Devices ◽  
Recycling Process

scholarly journals Design, Materials, and Extrusion-Based Additive Manufacturing in Circular Economy Contexts: From Waste to New Products

2021 ◽  
Vol 13 (13) ◽  
pp. 7269
Author(s):  
Alessia Romani ◽  
Valentina Rognoli ◽  
Marinella Levi
Keyword(s):  
Additive Manufacturing ◽  
Case Studies ◽  
Circular Economy ◽  
Academic Research ◽  
Design Strategies ◽  
Academic Context ◽  
Application Fields ◽  
Research And Design ◽  
Specific Contribution ◽  
New Strategies

The transition toward circular economy models has been progressively promoted in the last few years. Different disciplines and strategies may significantly support this change. Although the specific contribution derived from design, material science, and additive manufacturing is well-established, their interdisciplinary relationship in circular economy contexts is relatively unexplored. This paper aims to review the main case studies related to new circular economy models for waste valorization through extrusion-based additive manufacturing, circular materials, and new design strategies. The general patterns were investigated through a comprehensive analysis of 74 case studies from academic research and design practice in the last six-year period (2015–2021), focusing on the application fields, the 3D printing technologies, and the materials. Further considerations and future trends were then included by looking at the relevant funded projects and case studies of 2021. A broader number of applications, circular materials, and technologies were explored by the academic context, concerning the practice-based scenario linked to more consolidated fields. Thanks to the development of new strategies and experiential tools, academic research and practice can be linked to foster new opportunities to implement circular economy models.

scholarly journals Barriers and challenges to plastics valorisation in the context of a circular economy: Case studies from Italy

2019 ◽  
Vol 241 ◽  
pp. 118149 ◽  
Author(s):  
Angelo Paletta ◽  
Walter Leal Filho ◽  
Abdul-Lateef Balogun ◽  
Eleonora Foschi ◽  
Alessandra Bonoli
Keyword(s):  
Case Studies ◽  
Circular Economy ◽  
Barriers And Challenges

scholarly journals The Importance of the Participatory Dimension in Urban Resilience Improvement Processes

2020 ◽  
Vol 12 (18) ◽  
pp. 7305 ◽  
Author(s):  
Maria LopezDeAsiain ◽  
Vicente Díaz-García
Keyword(s):  
Environmental Economic ◽  
Urban Environment ◽  
Case Studies ◽  
Citizen Participation ◽  
Future Development ◽  
Circular Economy ◽  
Urban Regeneration ◽  
Urban Resilience ◽  
The Impact ◽  
Regeneration Processes

This article discusses the approach adopted by the researchers into citizen participation in urban regeneration actions and projects. It describes the concepts of sustainability and habitability in relation to the urban environment and architecture within the framework of improving the resilience of our cities through the circular economy and decarbonisation processes in architecture. The authors review the participatory dimension of different urban regeneration actions carried out in Spain and the impact of this dimension on the results obtained by environmental, economic and social urban improvements. They then define possible strategies and methodological tools for integrating this dimension into traditional urban regeneration processes. The article presents case studies and their specific characteristics, and draws conclusions about their effectiveness and relevance. It also compares citizen-led interventions with interventions led by public administrations. Lastly, the authors analyse the potential reasons for success in these processes and projects, identifying weaknesses and proposing possible strategies for future development by researchers.

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