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Review of bioplastics characterisation by terahertz techniques in the view of ensuring a circular economy
Andreja Abina, Tjaša Korošec, Uroš Puc, Aleksander Zidanšek, 2023, pregledni znanstveni članek

Opis: The increasing scarcity of natural resources, worsening global climate change, environmental degradation, and rising demand for food are forcing the biotechnology and plastics industries to seek and apply circular economy models that would lead to a sustainable transition in the production and use of bioplastics. Circular economy models can improve the economic productivity of bio-based plastics and have a positive impact on the environment by reducing conventional plastic waste and the consumption of petrochemical feedstocks for plastic production. In addition, some agricultural wastes that have the potential to be used as bioplastics can be reused. Terahertz (THz) systems are already used in the plastics and rubber industries for non-destructive testing, detection, imaging, and quality control. Several reports have highlighted the potential applications of THz spectroscopy and imaging in polymer analysis and plastics characterisation. This potential is even greater with chemometric methods and artificial intelligence algorithms. In this review, we focus on applications that support the transformation of the biotechnology sector to the circular economy, particularly via the transition from conventional plastics to bioplastics. In this review, we discuss the potential of THz systems for the characterisation and analysis of bioplastics and biopolymers. The results of previous studies on biopolymers in the THz frequency range are summarised. Furthermore, the potential of using artificial intelligence approaches such as machine learning as advanced analytical methods in THz spectroscopy and imaging, in addition to the conventionally used chemometric methods, is discussed. The results of this review highlight that THz technology can contribute to closed technological circles in important areas of biotechnology and the related plastics and rubber industries.
Ključne besede: terahertz spectroscopy, terahertz imaging, circular economy, biopolymer, biotechnology, bioplastics
Objavljeno v DKUM: 16.04.2024; Ogledov: 89; Prenosov: 0
.pdf Celotno besedilo (5,14 MB)
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3.
The complexity and interconnectedness of circular cities and the circular economy for sustainability
Kristijan Brglez, Matjaž Perc, Rebeka Kovačič Lukman, 2023, izvirni znanstveni članek

Opis: In our study, we are evaluating the dynamic interplay between circular cities and the circular economy, revealing connections shaped by new research insights, using Web of Science database. We have in depth analysed 671 publications from 1990 to mid- 2023, employing Leximancer and VOSviewer tools. Our analysis uncovered key themes, including buildings, waste management, value chains, and sustainable development, linking the circular cities concept and circular economy framework. Emerging research trends, such as urban metabolism, urban mining, governance models, the built environment, sustainability benchmarks, and value chain management, signify deliberate shifts towards higher circular development and implementation. These trajectories harmonise with overarching sustainable development goals. Contemporary research emphasises urban mining, circular indicators, adaptive resource reuse, and urban structure regeneration. This focus facilitates transitioning from linear models to heightened circularity within urban contexts. Research inclination is shifting from traditional economic and environmental concerns towards holistic urban configurations that prioritise social integration, communal well-being, and the dynamics of the social economy. Through this analytical expedition, we offer novel insights that enhance our understanding of the intricate symbiosis between circular cities and the circular economy. Our findings provide a scientific foundation for formulating targeted strategies by decision-makers and guiding urban landscapes towards transformative trajectories aligned with sustainable development objectives and sustainable cities.
Ključne besede: bibliometric analysis, circular city, circular economy, content analysis, Leximancer, sustainability, sustainable development goals
Objavljeno v DKUM: 29.03.2024; Ogledov: 58; Prenosov: 2
.pdf Celotno besedilo (3,76 MB)
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4.
Drivers and barriers for the adoption of circular economy principles towards efficient resource utilisation
Vesna Alivojvodić, Filip Kokalj, 2024, izvirni znanstveni članek

Opis: Contemporary societies, whether they have reached advanced levels of economic and social development or are still developing, need to prioritise the implementation of circular economy practices. This will facilitate the shift towards regenerative, sustainable, and closed-loop industrial systems. For now, there are some efforts to encourage patterns of production and consumption through changes in economic trends, development of institutional frameworks, harmonising regulations in the field of environmental protection, and raising the level of social awareness to achieve, above all, greater efficiency of resources. Extensive literature that deals with monitoring the implementation of the circular economy already indicates the existence of numerous barriers in this process but also notices some incentives for raising the degree of circularity of the observed systems. In this paper, the question of whether a single value can represent the level of circularity of the chosen material/product chain is researched. An overview of barriers and drivers for implementing circular economy strategies is given to structure a proper metric framework in correlation to the research question. The objective was to simplify the monitoring of circularity by developing a unique index for comparing material/product chains in similar systems. This was accomplished by using the circular material use (CMU) rate introduced in the European Union and modifying it for financial data calculation. As a result, the circular economy index, which covers all 9R strategies (CEIR), is obtained. The practical verification of model applicability was shown by determining the degree of circularity achieved for passenger cars in the four observed EU countries.
Ključne besede: barriers, 9R framework, circular material use rate, circular economy index, passenger cars
Objavljeno v DKUM: 19.03.2024; Ogledov: 104; Prenosov: 9
.pdf Celotno besedilo (671,51 KB)
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5.
6th International Conference on Technologies & Business Models for Circular Economy : conference proceedings
2024, zbornik

Opis: The 6th International Conference on Technologies & Business Models for Circular Economy (TBMCE) was organized by the Faculty of Chemistry and Chemical Engineering of the University of Maribor in cooperation with Strategic Research and Innovation Partnership – Networks for the transition into circular economy (SRIP – Circular economy), managed by the Chamber of Commerce and Industry of the Štajerska. The conference was held in Portorož, Slovenia, at the Grand Hotel Bernardin from September 6th to September 8th, 2023. TBMCE 2023 was devoted to presentations of circular economy concepts, technologies and methodologies that contribute to the shift of business entities and society as a whole to a more responsible, circular management of resources. The conference program included a round table Standardization for circular economy – more secure and less complicated closing of material loops, 6 panel discussions, 1 plenary and 3 keynote lectures, oral and poster presentations. The event was under the patronage of Ministry of the Economy, Tourism and Sport and Ministry of Cohesion and Regional Development. The Netherlands joined us as a partner country.
Ključne besede: sircular economy, sustainable development, processes and technologies, circular business models, research and development
Objavljeno v DKUM: 26.02.2024; Ogledov: 192; Prenosov: 24
.pdf Celotno besedilo (24,07 MB)
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6.
Supply chain management mitigation to climate change in three selected industrial sectors
Maja Bašić, Špela Kovše, Andraž Opačić, Marijana Pećarević, Matevž Obrecht, 2023, izvirni znanstveni članek

Opis: As the world economy is growing and globalisation is on the rise, climate change and its effects on the planet Earth are also increasing. But climate changes do not disturb only nature; they also affect businesses and their supply chains. Many companies have recently recognised the positive impacts of green and circular supply chain management practices. Supply chains that deliver products from around the world are increasingly exposed to the impacts of a changing climate and scarce resources. In this research, it was determined how climate change impacts supply chains in the food, automobile, and energy industry sectors. Furthermore, we wanted to find out if and how the management of supply chains is altered to adapt to the business environment which is more and more affected by environmental changes.
Ključne besede: climate change adaptation and mittigation, circular economy, sustainable developement, supply chain management
Objavljeno v DKUM: 16.02.2024; Ogledov: 159; Prenosov: 10
.pdf Celotno besedilo (453,37 KB)
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7.
Converting waste into products and energy using complete circular economy and the hydrogen effect technique to reduce dependence on natural gas
Anita Kovač Kralj, 2023, izvirni znanstveni članek

Opis: Conversion of waste into products and energy has the potential to reduce CO2 emis-sion through implementation of a complete circular economy and utilisation of the hy-drogen effect technique. This study considers the novelties of the hydrogen effect tech-nique, which incorporates an upgraded input unit mathematical model. It includes real-simulated results obtained using an Aspen Plus & REG; simulator, and enlarged production. This technique is developed for optimal municipal solid waste (MSW) combustion, gas-ification, and reforming, presented as an upgraded input unit for syngas production, which can reduce CO2 emissions by 3 & BULL;106 kmol a-1. This approach is exemplified by utilizing existing methanol and dimethyl ether production processes from natural gas, as they can be achieved and exceeded using MSW with varying hydrogen amounts. The optimal upgraded methanol and dimethyl ether production processes can increase pro-duction by 47 % and 16 %, including only the upgraded input unit, as well as decrease the temperature in the product reactors by 30 & DEG;C.
Ključne besede: waste gasification, flue gas, syngas, hydrogen, circular economy, combustion
Objavljeno v DKUM: 13.02.2024; Ogledov: 167; Prenosov: 15
.pdf Celotno besedilo (524,98 KB)
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8.
Regulatory Aspects of Servitisation : Study Materials for Global Law Course
Janja Hojnik, 2024

Opis: This course material was prepared as a support for a lectures series under Global Law Programme organised by the Catholic University Leuven (Belgium), Faculty of Law and Criminology. The course dealt with EU regulatory challenges arising from the servitisation of manufacturing and the related sustainability and digitalisation process in the EU economy. Servitisation is a complex interdisciplinary concept that essentially stands for bringing together products and services. Servitization as an economic megatrend reflects consumers’ oriented business models, offering not just products to the buyers, but solutions to their problems. This solution offering is enhanced by digitalisation of the economy that makes the relationship between product-service providers and their customers easier to maintain due to various mechanisms of distant communication and monitoring. Moreover, servitisation is at the centre of the endeavours to establish a more sustainable circular economy. Adding services to products can prolong their consumption time, decrease the amount of materials needed for certain effect and improve waste management. Increasingly, however, it is clear that servitisation is not just related to environmental sustainability, but social as well. These services often require people to be performed and digital applications tend to decrease their rights as workers to the benefit of the owners of these applications.
Ključne besede: servitisation, digitalisation, circular economy, sharing economy, platforms, extended producer's responsibility, ecodesign, consumer protection, EU
Objavljeno v DKUM: 01.02.2024; Ogledov: 192; Prenosov: 7
.pdf Celotno besedilo (3,04 MB)
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9.
Innovative gasification technology for the circular economy
Teos Perne, Marko Šetinc, Tine Seljak, 2020, izvirni znanstveni članek

Opis: This article presents a novel gasification technology process in the context of achieving carbon neutrality by establishing a sustainable circulation of carbonaceous materials with a focus on the production of virgin materials from various kinds of waste. The technology can alleviate the key limitations of existing gasification systems, which are the production and management of residue tars. The innovative technology process re-utilizes tars within the reaction itself, enabling an endless cycle of carbon. It also ensures high flexibility for efficiently handling heterogenic waste materials.
Ključne besede: gasification, carbonaceous, waste, tars, syngas, catalyst, circular economy, carbon, methano
Objavljeno v DKUM: 01.12.2023; Ogledov: 312; Prenosov: 6
.pdf Celotno besedilo (2,56 MB)
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10.
6th International Conference on Technologies & Business Models for Circular Economy : book of abstracts
2023

Opis: The 6th International Conference on Technologies & Business Models for Circular Economy (TBMCE) was organized by the Faculty of Chemistry and Chemical Engineering, University of Maribor in collaboration with the Strategic Research and Innovation Partnership - Networks for the Transition into Circular Economy (SRIP- Circular Economy), managed by the Chamber of Commerce and Industry of Štajerska. The conference was held in Portorož, Slovenia, at the Grand Hotel Bernardin from September 6th to September 8th, 2023. The Netherlands joined us as a partner country of the conference. TBMCE 2023 was devoted to presentations of circular economy concepts, technologies and methodologies that contribute to the shift of business entities and society as a whole to a more responsible, circular management of resources. The conference program included panel discussions, plenary and keynote sessions, oral and poster presentations on the following topics: Sustainable energy, Biomass and alternative raw materials, Circular business models, Secondary raw materials and functional materials, ICT in Circular Economy, Processes and technologies. Panel discussions addressed following topics: Capture, storage or conversion of CO2 or H2?, The potential of small scale biorefining, Circular economy in construction – myth or real opportunity?, Importance of circular communities in international arena, Sector Coupling: pathways to integrated energy systems, Combating water pollution by plastic waste. The event was
Ključne besede: circular economy, sustainable development, processes and technologies, circular business models, research and development
Objavljeno v DKUM: 01.09.2023; Ogledov: 318; Prenosov: 44
.pdf Celotno besedilo (3,06 MB)
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