The circular economy (CE) is now more imperative than ever due to several shortcomings humanity faces due to global economic disruptions. The CE might help initiate a virtuous circle whereby waste materials would be turned into resources for other companies to create closed-loop systems. However, the CE remains a niche paradigm embraced by only a small number of companies in some areas of the world. Some authors have argued that it is essential to encourage stakeholders at different implementation levels of a CE to increase the uptake of this new model among companies, and stakeholders may provide the required framework for the shift towards a circular model. Therefore, the purpose of this study is to answer the following research question: how can the transition towards the CE be accelerated from a `stakeholders¿ perspective? The study was undertaken in the Spanish region of Basque Country, where a CE strategy is already in place at the regional level, and some companies are already delivering circular solutions. This approach was selected to help understand the lack of widespread adoption of CE initiatives in a local system despite having a regional CE strategy. Data were collected from respondents from various stakeholders and also from desk research to ensure their reliability. The results showed the relevance of understanding how stakeholders can help speed up the transition by proactively exploring new ways to create novel conditions to work together with a broad...

Current research on the circular economy (CE) reveals that, while the concept and its application have been extensively explored as shown in several case studies, the definition of tools and criteria measuring ¿circularity¿ of products, companies or regions are not well-defined. Therefore, indicators for measuring the different levels of a CE (micro, meso, and macro) should be a high priority for stakeholders (governments, companies, NGOs, civil society, etc.) in order to track progress on CE initiatives. However, the increasing interest on CE has caused a still open debate on the conceptualization of CE which hampers the creation of indicators based on a common conceptual framework. As a result, the absence of standard indicators to track progress on circularity is leading to contradiction and misunderstanding, which represents a challenge to the implementation of CE strategies. Thus, this study tries to address this gap by advancing a set of indicators adapted from existing indicators that guarantees simplicity and effectiveness, closely based on indicators proposed by government bodies. This research carried out an exploratory study to formulate the indicators requirements based on literature, refined through experts¿ opinion and then they were tested in Spanish companies located in the Basque Country region through an empirical work to assess this theory...

The management of electronic waste (e-waste) mainly from televisions and computers, has turned into an environmental issue due to the increased demand in the electronics sector and the highly toxic contents (mercury, lead, or cadmium) of some of these devices that make them almost unrecoverable. Therefore, these valuable devices become wastes disposed of in landfills. Worldwide, some scholars have proposed recycling methods that re-introduce these wastes streams in the manufacturing process of heavy concrete, pavement, concrete blocks, and clay bricks among other unconventional products. The replacement rates of virgin materials with recycled e-waste fluctuate according to the type of waste. Nevertheless, the use of e-waste generates a positive environmental impact due to the less demand for virgin materials such as river sand and gravel. This study aimed to review the current e-waste recycling state-of-the-art such as circuit boards (PCB), high-impact polystyrene (HIPS), cathode ray tube (CRT), and LCD screens. A systematic review of scientific literature published in the last 10 years (2010-2019) was done through the SCOPUS database. The results showed a maximum potential replacement rate of 40% for this type of waste, given the effect on the physical and thermomechanical properties of the concrete.

Defining the circular economy (CE) as a material and energy model coincides with the definition given by multiple authors in which Industrial Symbiosis (IS) has been deemed as a foundational strategy to support the implementation of the CE. The consumption of secondary materials is essential to achieve a successful transformation from a linear economy to a CE focused on IS practices. In this scenario, small and medium enterprises (SMEs) play a major role as stakeholders in developing CE systems as it is not possible to create this model with each company working in isolation. However, there is a lack of empirical studies on the role played by relevant local stakeholders such as individual firms interacting in the development of a local CE system. This study aimed to study the challenges that SMEs face in developing a CE system. A case study is selected as a research strategy using a mixed-method approach: a sequential quantitative (questionnaire) and qualitative (semi-structured interviews) data collection techniques were employed for this research. It was observed that an absence of inter-organisational collaboration and a misunderstanding of the roles played by SMEs may impede the implementation of a local CE system level.

Sustainability and the circular economy are the answer to today's challenge of resource depletion and waste generation. The transition to circular economy requires technological and process innovations: However, the capacity for innovation has often been a point of difficulty, and the problem is worse in small-sized companies because of the scarcity of resources. Our aim is to show how a company committed to sustainability overcomes the obstacles in the innovation process.

Circular economy has been claimed as an approach to foster a systemic change in the current model based on disposability. Though, many companies have sprout to deliver circular solutions through either new business models, products or services, a full shift away from the entire system is lacking. In other words, in order to experience a fully transition toward a circular economy model, an inter-organizational approach needs to be deployed. This approach has been named industrial symbiosis whereby interactions among companies are crucial to start developing a circular economy in the so-called meso level. Collaboration among organizations rises as one of the most important factors in developing industrial symbiosis. In that sense, different projects have developed digital platforms with the idea of promoting active participation and collaboration between organizations. Those sorts of platforms ideally enable industrial symbiosis through gathering information about resources and potential substitutes in order to recommend waste-to-resource exchanges. However, depending on the context the platform was built certain characteristics may not apply. Thus, this paper is focused on the characteristics and usefulness of different available platforms that facilitate the exchange of waste as a resource, product or good. Based on this research, it is likely that none of the existing platforms and the upcoming ones will be one-size-fits-all, thus, for industrial symbiosis to succeed it is still important for companies to determine what their needs are and then explore which platform best covers their requirements.