Aspects Of Circular Economy Research Articles

Packaging’s of the organic farming products in the context of circular economy

Research background: Food production is more and more globalized concerning not only the suppliers of food ingredients and producers but also considering the packaging trends and solutions available on the market. In opposition to that trend the EU high quality food products schemes were implemented such as organic farming products or traditional and regional ones. That products are usually perceived as good for the environment which is not always case when the packaging of that products are considered. The other global trend described in the paper that is focusing the attention is circular economy idea that points to the takeover from a linear economy to a circular economy. This paper combine the specific product (organic food) and its packaging with the recommendations of circular economy. Purpose of the article: The purpose of the study was the question, if the studied companies that are under the strict obligatory surveillance according to the organic food production rules meet the requirements of the sustainable production and circular economy requirements. Methods: Food processing manufacturers operating on a polish market were surveyed in the area of circular economy aspects concerning the use of the product packaging to indicate the level of implementation and real interest in sustainable development and circular economy. Findings & Value added: The main findings are related to the conclusion that organic farming producers with no implemented voluntary management system standards do not implement circular economy requirements.

Understanding circular economy in everyday life: Perceptions of young adults in the Finnish context

It is generally accepted that governments, municipalities, businesses and citizens alike have a role to play in transitioning towards a circular economy (CE). Yet most academic and policy discussions of CE revolve around technological solutions and business models. Although CE also means significant changes to ways of living, these aspects of CE are barely addressed. The citizen role is traditionally assumed to be that of a consumer or user of the newly developed solutions, while also following the guidelines for sorting and recycling. Little is known about how citizens envision being part of the CE, and what skills and competences are relevant for CE. Our study addresses this gap by exploring the perceptions of young adults in Finland on how CE reflects into their everyday lives. Our dataset consists of 249 responses from high school students in Finland to open-ended questions regarding CE. The results highlight that young adults in Finland strongly associate CE with recycling, waste sorting and re-selling/buying second-hand, which is in line with the conventional roles of efficient recyclers and consumers. Although CE harbors wider potential for more active citizen roles related to repair, maintenance and upcycling, these aspects are often overlooked in favor of more familiar lifestyles. Building on the 5R framework for CE and emerging themes from student responses, we bring forward the new roles of upcycler, thrifter, expert/learner, giver/benefactor and conservationist. Supporting these emerging roles is an opportunity for cooperation between young adults, other citizen groups, cities, policy makers and businesses, and a key for jointly advancing the transition to CE.

Eco-UHPC as Repair Material-Bond Strength, Interfacial Transition Zone and Effects of Formwork Type.

A reduced carbon footprint and longer service life of structures are major aspects of circular economy with respect to civil engineering. The aim of the research was to evaluate the interfacial bond properties between a deteriorated normal strength concrete structure and a thin overlay made of Eco-UHPC containing 50 wt% of limestone filler. Two types of formwork were used: untreated rough plywood and surface treated shuttering plywood. The normal strength concrete elements were surface scaled using water jets to obtain some degradation prior to casting of the UHPC overlay. Ultrasonic pulse velocity (UPV), bond test (pull-off test), and Scanning Electron Microscopy (SEM) combined with Energy Dispersive Spectrometry (EDS) were used for analysis. Elements repaired with the Eco-UHPC showed significantly improved mechanical properties compared to the non-deteriorated NSC sample which was used as a reference. The bond strength varied between 2 and 2.7 MPa regardless of the used formwork. The interfacial transition zone was very narrow with only slightly increased porosity. The untreated plywood, having a rough and water-absorbing surface, created a surface friction-based restraint which limited microcracking due to autogenous shrinkage. Shuttering plywood with a smooth surface enabled the development of higher tensile stress on the UHPC surface, which led to a more intensive autogenous shrinkage cracking. None of the formed microcracks penetrated through the entire thickness of the overlay and some were partly self-healed when a simple water treatment was applied. The project results showed that application of UHPC as repair material for concrete structures could elongate the lifespan and thus enhance the sustainability.

More value from fewer resources: how to expand value stream mapping with ideas from circular economy

Purpose The purpose of this paper is to discuss recent trends in the circular economy and investigate how value stream mapping (VSM) can be extended to more fully include some of the critical aspects of circular economy. Design/methodology/approach The findings are based on previous research that has explored the usage of VSM to include aspects of the environment and sustainability aspects. These ideas are then expanded to new ways to use VSM by mapping value of a product as it is; used, maintained, re-used, remanufactured, recycled, incinerated or used for landfill. The authors test out this approach through application in the waste management sector to identify possibilities for improvement and new business opportunities in what now is considered waste. Findings This paper introduces an expanded version of VSM that refines the existing Lean toolbox for exploring value and mapping value in a circular economy. Practical implications The aim of this paper is to expand the relevance and practical value of VSM as the world economy increasingly moves toward a circular one. Originality/value Today, VSM is a widespread method within Lean manufacturing that scrutinizes value creation within an organization or within a value chain. This paper describes how VSM can be refined to explore value streams in the afterlife of a product and explore waste as a resource utilization opportunity.

The interplay of circular economy with industry 4.0 enabled smart city drivers of healthcare waste disposal

Generation of healthcare waste from different patient care activities in hospitals, pathology labs and research centres has been a matter of great concern for environmental and social bodies across the world. This concern comes from its infectious and hazardous nature which brings life taking disease such as human immunodeficiency virus and Hepatitis-B. Moreover, with the outbreak of corona virus disease 2019 (COVID-19) pandemic across the world, healthcare waste has become even more infectious like never before and showing its potential for claiming lives if not disposed properly. Additionally, the COVID-19 has put up another challenge in terms of exponentially increasing demand for personal protective equipments for healthcare workers such as doctors, nurses, ward boys, and sanitation workers. In this paper, seven criteria related to smart healthcare waste disposal system infused by circular economy aspects to recover value from disposables are identified and analysed using a decision making trial and evaluation laboratory (DEMATEL) method. The criteria have been prioritized by its importance and net cause and effect relationship through a causal diagram. Two criteria, (i) digitally connected healthcare centres, waste disposal firms and pollution control board, and (ii) providing a pollution control board’s feedback app to public and other stakeholders, feature as strong reasons for a smart healthcare waste disposal system. Conclusively, this study provides a causal relationship model among the intertwined drivers of industry 4.0 and circular economy for developing a smart healthcare waste disposal system enriched with the benefits of circular economy.

Rise of the sustainable circular economy platform from waste plastics: A biotechnological perspective

Abstract

Fermented Alfalfa Brown Juice Significantly Stimulates the Growth and Development of Sweet Basil (Ocimum basilicum L.) Plants

Fertilization management is a key issue in plant nutrition to produce plants with good quality and quantity. Deproteinized leaf juice or brown juice (BJ) is a by-product during the isolation of leaf protein from biomass crops such as alfalfa. The idea of using BJ as a biostimulant fits well in the aspect of circular economy since BJ is currently a problematic issue of the leaf protein production approach. Fractionation of one-kilogram fresh biomass results in approximately 500 cm3 BJ. Due to fast spoil of fresh BJ, if left on room temperature, it is found that fermentation of fresh BJ using lactic acid bacteria and reducing its pH increases its stability and storage on room temperature. In the present study, we examined the effect of fermented alfalfa BJ on vegetative, physiological, and anatomical properties of the versatile sweet basil (Ocimum basilicum L. ‘Bíborfelhő’) plants. Sweet basil seedlings were sprayed at different doses of fermented alfalfa BJ (i.e., 0.5%, 1.0%, and 2.5%) and tap water served as a control (0.0% BJ). The results revealed that foliar application of fermented alfalfa BJ significantly improved the biometrical features of sweet basil plants. Plants treated with fermented BJ showed significantly higher values of all the measured parameters compared to the control (0.0%), except for the number of leaves per plants where control plants (0.0%) had more leaves. However, the leaves of control plants (0.0%) were smaller than treated plants as data of leaf area showed. Fermented alfalfa BJ significantly increased the content of photosynthetic pigments (chl a and chl b), relative chlorophyll (SPAD value), lengths of stem and root, fresh masses of stem, root, and leaves, volumes of stem and root, and leaf area. Despite all rates of fermented BJ displayed higher values over control plants (0.0%), the rate of 0.5% was the best one supported by results. Application of fermented alfalfa BJ influenced the anatomical parameters as well. These findings demonstrate the possible use of fermented alfalfa BJ as a promising novel plant biostimulant.

Circular economy: Preserving materials or products? Introducing the Resource States framework

This paper draws on material entropy and life cycle thinking to develop the Resource States framework. This framework clarifies and systematises the language around resources within the circular economy (CE) discourse, such that insights from different tools and approaches that investigate different aspects of CE can be aggregated and a more comprehensive picture of complex circular systems can be compiled. Currently, progress of the CE discourse is hampered by a lack of a clear and systematic approach to what we refer to as the particle state and the product state. That is: whether to approach resource circulation from the perspective of elements, molecules or materials; or whether to adopt the perspective of products or finished goods. As these two perspectives are often implicit in current contributions to CE, we first articulate both approaches, before assessing their respective contributions and limitations. Next, we draw on material entropy and life cycle thinking to integrate both perspectives and develop a more comprehensive way of conceptualising resource states, in the form of the Resource States framework. We furthermore present how this framework can be used A) to clearly distinguish between circular strategies, as well as between different implementation scenarios of the same circular strategy; B) to systematically explore and map synergies and trade-offs between combinations of circular strategies; and C) to link circular strategies with structural waste present in a given context. Lastly, we discuss the strengths and weaknesses of the framework and reflect on how it advances the CE field.

Analysis of social dimension and well-being in the context of circular economy

Circular economy (CE) is based on environmental, economic and social dimensions which aims to ensure sustainable development on each step of product creation, transformation and conversion by creating a closed loop economy. The purpose of the article is to propose a concept of social dimension of the CE, apply and provide empirical evidence based on the data of Baltic Sea region countries. The study augmented for the models that include the analysis of the circular economy concept, necessary for the social pillar as part of it including: human well-being, healthy ageing, health and social justice. The multi-criteria decision methods MULTIMOORA and TOPSIS were used to assess the social dimension in the context of circular economy. Results reveal that the highest ranks of social aspect of circular economy were tagged to Denmark, Sweden and Finland for the periods of 2014-2017 and the weakest result belonged to Latvia. Findings are also useful to add to theoretical building and also evaluate the social aspect in the concept of circular economy.

Paper Waste Recycling. Circular Economy Aspects

Abstract Paper waste is a raw material for a lot of products with different added value. The engineering, economic and environmental aspects of paper waste recycling are analysed for production of composite material, cellulose nanofibers and nanocrystals, bricks with paper components, porous carbon, film of biopolymer, enzymatic sugar and bioenergy: bioethanol, hydrogen and biofuel. Through multicriteria analysis, it was possible to determine the most feasible paper waste recycling product in case of four product groups: egg packaging boxes, cardboard, reused paper, cellulose nanomaterials (nanofibers and nanocrystals). The production of cellulose nanofibres and cellulose nanocrystals has an advantage over egg packaging and cardboard production as well as reusable paper.

Impact of modularity as a circular design strategy on materials use for smart mobile devices

ABSTRACT

Fostering the Integration of Circular Economy Aspects into the Construction and Real Estate Industry

The conscious use of natural resources has always been a key concern of the German Sustainable Building Council (DGNB) since its foundation in 2007. In order to further drive forward this topic and to foster a more circular resource use within the construction and real estate industry, the DGNB has integrated circular economy bonuses into the current version 2018 of the DGNB System, providing a positive impact on the overall certification outcome. The DGNB System is thus the first of its kind to make circular economy principles an assessable and measurable aspect of buildings. The circular economy bonuses range from the reduction of the material input and the avoidance of waste through the reuse and recycling of building components up to the implementation of sharing models leading to an increased usage intensity of the buildings. In close cooperation with its members, the DGNB has developed a guideline on the integration of circular economy aspects into the construction and real estate industry. The guideline published in January 2019provides examples of putting these aspects into practice and encourages planners to integrate innovative and circular building solutions into the planning of sustainable buildings.

Circular Economy Aspects Regarding LED Lighting Retrofit—from Case Studies to Vision

The lighting industry is still a linear economy, despite the extensive use of light-emitting diode (LED) and the ban of incandescent/halogen lamps, claiming to be greener and more human centered. Light-emitting diode has changed radically the whole lighting industry with an increased luminaire efficacy more than four times higher compared with fluorescent lamps and their new opportunities for modern control systems. In the years to come, millions of fluorescent luminaires will become waste and will be replaced by LED luminaires. According to the Cost European Cooperation in Science & Technology Program the next step will be from sustainability to regenerative (enabling social and ecological systems to maintain a healthy state and to evolve) and to get there, circular economy is essential. In order to reduce even further the carbon footprint, the retrofit of existing luminaires and additional modern control systems should be the solution. Circular economy aspects for the lighting area were identified using the university adopted lighting retrofit solutions as case studies. For an LED retrofitted recessed luminaire 4 × T8 18 W studies showed a major installed power reduction, a good lighting distribution, but also revealed some problems: the retrofit luminaire has no certification, necessity of qualified personnel, high labor costs, etc. A major issue is the fact that luminaire design did not take into consideration circular economy aspects like the possibility of future retrofit solutions. It is important that from now on a different approach should be foreseen for the LED luminaire design. There is a section about vision, which plays an important role in preparing new luminaire generations with circular economy in mind.

Case Study Analysing Potentials to Improve Material Efficiency in Manufacturing Supply Chains, Considering Circular Economy Aspects

In order to decouple economic growth from global material consumption it is necessary to implement material efficiency strategies at the level of single enterprises and their supply chains, and to implement circular economy aspects. Manufacturing firms face multiple implementation challenges like cost limitations, competition, innovation and stakeholder pressure, and supplier and customer relationships, among others. Taking as an example a case of a medium-sized manufacturing company, opportunities to realise material efficiency improvements within the company borders—on the supply chain and by using circular economy measures—are assessed. Deterministic calculations and simulations, performed for the supply chain of this company, show that measures to increase material efficiency in the supply chain are important. However, they need to be complemented by efforts to return waste and used products to the economic cycle, which requires rethinking the traditional linear economic system.

Stakeholder Views on Extended Producer Responsibility and the Circular Economy

Extended Producer Responsibility (EPR) regulations require that producers organize and pay for treatment and recycling of waste arising from their products at end of life. EPR has been effective in implementing some aspects of circular economy. In Europe, 35% of e-waste and 65% of packaging waste have already been recycled (or reused in some cases). This article analyzes the challenges of implementing EPR and provides useful insights for what has worked well and what challenges remain. Identifying and addressing these challenges will be crucial for framing legislation that will move industry and society toward a more circular economy.

Addressing Criticality in Rare Earth Elements via Permanent Magnets Recycling

Rare earth elements (REEs) are critical for many advanced technologies and are faced with potential supply disruptions. Recycling of permanent magnets (PMs) can be good sources for REEs which can help minimize global dependence on freshly mined REEs, but PMs are rarely recycled. Recycling of PMs has been discussed with respect to improving REEs resource sustainability. Some challenges to be addressed in order to establish industrially deployable technologies for PMs recycling have also been discussed, including profitability, energy efficiency and environmental impacts. Key considerations for promoting circular economy via PMs recycling is proposed with the focus on deciding the target points in the supply chain at which the recycled products will be inserted. Important technical considerations for recycling different forms of waste PMs, including swarfs, slags, shredded and intact hard disk drives magnets, have been presented. The aspects of circular economy considered include reusing magnets, remanufacturing magnets and recovering of REEs from waste PMs.