Food waste and circular economy:challenges and opportunities

The world’s population is expected to grow at an increasing rate, leading to increased food consumption and waste production. Even though food waste represents one of the most challenging economic and environmental issues of the 21st century, it also provides a vast array of valuable resources. To address the challenge, this study uses resource recovery from food waste to close the supply chain loop, which is the cornerstone of a circular economy. By applying the bibliometric review technique, trends and patterns in food waste and circular economy were studied. The analysis of frequent keywords in the field provided insights into further research directions. A Boolean search of the keywords in the Scopus database resulted in 288 articles, published between 2015 and 2021. Further screening of titles, keywords, and abstracts resulted in 155 journal articles. Bibliometric coupling, including authors’ co-citation data, co-occurrence, and the occurrence of keywords, was graphically mapped using VOSviewer software. From the analysis of the publications, eight broad themes emerged: (1) anaerobic digestion of food waste for circular economy creation; (2) food waste systems and life cycle assessments for circular economy; (3) bio-based circular economy approaches; (4) consumer behavior and attitudes toward circular economies; (5) food supply chains and food waste in a circular economy; (6) material flow analysis and sustainability; (7) challenges, policies, and practices to achieve circularity; and (8) circular economy and patterns of consumption. Based on the eight themes, we emphasize an urgent need to promote the collaboration of governments, the private sector, educational institutions, and researchers, who should combine efforts to promote, integrate and accelerate acceptance of circularity, which will potentially mitigate greenhouse emissions associated with food loss and waste. We also highlight an opportunity to encourage consumer acceptance of upcycled food in the food waste hierarchy. In addition, we deduce that there is a need to quantify food waste and emissions of greenhouse gases due to this waste along the food value chain; this is important as it is one pathway of examining the ‘food leaks’ along the food supply chain. This can then inform optimal strategies targeting specific areas of the food supply chain experiencing food leaks. Lastly, food wastage affects the entire globe; however, future studies and funding need to be channeled towards investigating the possibility of implementing circularity in developing countries.</p

A pilot-plant for the selective recovery of magnesium and calcium from waste brines

The problem of brines disposal has raised great interest towards new strategies for their valorisation through the recovery of minerals or energy. As an example, the spent brine from ion exchange resins regeneration is often discharged into rivers or lakes, thus impacting on the process sustainability. However, such brines can be effectively reconcentrated, after removal of bivalent cations, and reused for the resins regeneration. This work focuses on developing and testing a pilot plant for selective recovery of magnesium and calcium from spent brines exploiting a novel proprietary crystallization unit. This is part of a larger treatment chain for the complete regeneration of the brine, developed within the EU-funded ZERO BRINE project. The pilot crystallizer was tested with the retentate of the nanofiltration unit processing the spent brine from the industrial water production plant of Evides Industriewater B.V. (Rotterdam, The Netherlands). Magnesium and calcium hydroxide were selectively precipitated by adding alkaline solution in two consecutive steps and controlling reaction pH. Performance was assessed in terms of recovery efficiency and purity of produced crystals, observing in most investigated cases a recovery of about 100% and 97% and a purity above 90% and 96%, for magnesium and calcium hydroxide, respectively

Digital and Territorial Trails System for Developing Sustainable Tourism and Enhancing Cultural Heritage in Rural Areas: The Case of San Giovanni Lipioni, Italy

Depopulation has become a significant issue for local culture and built heritage conservation of many European rural areas. In San Giovanni Lipioni, a province of Chieti (Italy), this phenomenon has increased to the point that, nowadays, there are only 150 inhabitants and no significant economic activities. In this regard, the present paper aims to describe the crucial role of nature-oriented tourism in an economic, social, and revitalization strategy; how digital tools can be used to map and create a territorial trail system between municipalities; and, finally, outline the operations necessary for reactivation. The proposed methodology consists of a first digital survey phase using GPS receivers and outdoor navigation apps. The second phase would create a web platform with a system of virtual itineraries between villages, named “The Golden Leaves Paths”. After that, the last phase concerns the creation of analysis factsheets to guide the maintenance of paths and the design of iconic signage with artistic illustrations based on the oak leaves leitmotif to be installed along the paths. A local social promotion association will employ the outcomes, technical drawings, and strategies to reactivate paths as an attractive element for nature-oriented tourism and create a digital platform to foster the village’s territorial and cultural heritage

Designing generic technologies in Energy Research: learning from two CEA technologies for double unknown management

International audienceThe aim of this paper is to shed light on an innovative strategy for the design of generic technologies (GTs). Research on radical innovation management, while recognizing the success of GTs, generally describes their design according to evolutionary strategies featuring multiple and uncertain trials, which would finally result in the discovery of common features between multiple applications. Building on a case study conducted on two technological development programs at the French Alternative Energies and Atomic Energy Commission (CEA), we exhibit an anomaly to this rarely discussed idea: we describe an alternative strategy that consists in intentionally designing common features that bridge the gap between a priori heterogeneous applications and a priori heterogeneous technologies. This anomaly brings three main results: 1) The usual trial-and-learning strategy is not necessarily the only strategy to design a GT; 2) beyond technological breakthrough, the value of GTs also relies on the capacity to reuse and connect existing technologies; 3) the design of GT might require sophisticated organizational patterns to be able to involve multiple technology suppliers and applications' providers

Common Sustainable Governance Model for Archaelogical Parks

Il testo sintetizza in forma manualistica i risultati del Progetto TRANSFER finanziato dalla UE), finalizzato ad individuare un modello condiviso a livello europeo per la gestione deo Parchi archeologic

V Jornadas de Investigación de la Facultad de Ciencia y Tecnología. 2016

171 p.I. Abstracts. Ahozko komunikazioak / Comunicaciones orales: 1. Biozientziak: Alderdi Molekularrak / Biociencias: Aspectos moleculares. 2. Biozientziak: Ingurune Alderdiak / Biociencias: Aspectos Ambientales. 3. Fisika eta Ingenieritza Elektronika / Física e Ingeniería Electrónica. 4. Geología / Geología. 5. Matematika / Matemáticas. 6. Kimika / Química. 7. Ingenieritza Kimikoa eta Kimika / Ingeniería Química y Química. II. Abstracts. Idatzizko Komunikazioak (Posterrak) / Comunicaciones escritas (Pósters): 1. Biozientziak / Biociencias. 2. Fisika eta Ingenieritza Elektronika / Física e Ingeniería Electrónica. 3. Geologia / Geologia. 4. Matematika / Matemáticas. 5. Kimika / Química. 6. Ingenieritza Kimikoa / Ingeniería Química