Alfio Strano

Anaerobic codigestion of olive mill wastewater for renewable energy production constitutes a promising process to overcome management and environmental issues due to their conventional disposal. The present study aims at assessing biogas and biomethane production from olive mill wastewater by performing biochemical methane potential tests. Hence, mixtures containing 0% (blank), 20% and 30% olive mill wastewater, in volume, were experimented on under mesophilic conditions. In addition, life cycle assessment and life cycle costing were performed for sustainability analysis. Particularly, life cycle assessment allowed assessing the potential environmental impact resulting from the tested process, while life cycle costing in conjunction with specific economic indicators allowed performing the economic feasibility analysis. The research highlighted reliable outcomes: higher amounts of biogas (80.22 ± 24.49 NL.kg_SV⁻¹) and methane (47.68 ± 17.55 NL.kg_SV⁻¹) were obtained when implementing a higher amount of olive mill wastewater (30%) (v/v) in the batch reactors. According to life cycle assessment, the biogas ecoprofile was better when using 20% (v/v) olive mill wastewater. Similarly, the economic results demonstrated the profitability of the process, with better performances when using 20% (v/v) olive mill wastewater. These findings confirm the advantages from using farm and food industry by-products for the production of renewable energy as well as organic fertilizers, which could be used in situ to enhance farm sustainability.

This study examined whether health cues influence the choices of olive oil consumers with different degrees of knowledge about the nutritional properties of olive oil. To this end, a direct survey on the consumption of healthy extra-virgin olive oil was implemented by examining the stated preferences of a sample of consumers. Two econometric analyses were carried out to identify the drivers of the consumption of olive oil with high polyphenol content. The logistic model was chosen as the most suitable method to answer the research questions. The results revealed a general consensus among consumers regarding the beneficial properties of olive oil consumption. Moreover, the findings show that different degrees of individual knowledge act as distinctive drivers in influencing the health perception of olive oil consumers. Finally, this study verified that, even for healthy foods, consumers’ choices are strongly dependent on their own self-coherence. As a consequence, consumers’ knowledge or beliefs that orientate their attitudes are influenced by different motivations and attributes.

Farming systems need to be planned to provide suitable levels of economic profitability and, at the same time, ensure an effective energy use, in order to perform environmentally friendly production strategies. The herein present work aims to assess the efficiency of energy use and economic impacts of the main farming methods (conventional, organic and integrated) of Clementine’s crops in Calabria (South Italy), through a combined use of Life Cycle Energy Assessment (LCEA) approach and economic analysis. For this purpose, data were collected from clementine producers by using face-to-face interviews. The results revealed that average energy consumption in the organic farming systems was 72,739 MJ, lower than conventional and integrated systems equal to 95,848 MJ and 94,060 MJ, respectively. This is mainly due to the ban of chemicals. Economic analysis showed that organic farms were more profitable compared with the other farming methods, because of the greater selling price and the EU economic support, reaching an average net profit of 4255 € ha⁻¹ against 3134 € ha⁻¹ of integrated farms and 2788 € ha⁻¹ of conventional ones. The economic efficiency of energy from clementine production was 0.058 € MJ⁻¹ in the organic farming, higher compared to the other two farming systems equal to 0.033 € MJ⁻¹ on average.

Advances in the adoption of technological innovations represent a great driver to improve the competitiveness of the Italian extra virgin olive oil (EVOO) industry. This work assesses the efficiency of an innovative extraction plant (with low oxidative impact, heating of paste before malaxation and a special decanter that avoids the final vertical centrifugation) in terms of oil yield and quality, and economic and environmental impacts. Economic and environmental impacts were evaluated by using both life cycle costing and life cycle assessment methodologies. A sensitivity analysis was also performed to highlight the uncertain factors that may strongly affect the results. Findings showed that olive milling with the innovative plant resulted in olive oil with a significant increase in quality, although the extraction yield was significantly higher when using conventional technology. In terms of environmental results, an average growth of 4.5% of the impacts in all categories was reached. The economic results revealed the highest extraction cost for the innovative scenario as well as the lower profitability, although a positive return in investment feasibility can be achieved due to an increase in the olive oil selling price. These findings could be useful to highlight the main hotspots in EVOO production and to suggest improvements for more sustainable management.

Cooperation activities between Local Action Groups (LAGs) have been introduced into EU LEADER (Liaison Entre Actions de Développement de l’Économie Rurale) initiative to provide rural areas the opportunity to exchange experiences and best practices, as well as to realize common activities by pooling human and financial resources. The main purposes are to overcome isolation and add value to local development strategies. The benefits of cooperation are widely recognized but, undeniably, it can be also a difficult and time-consuming process. For this reason, evaluation is a necessary tool to measure the success of cooperation and to help actors address their strategies for the future. In this paper, an evaluation methodology is proposed and applied to an EU LEADER+ case study, the ‘Integrated Project for Rural Tourism: Environment and Qualified Hospitality’, a transnational cooperation experience led by LAG Aspromar, based in the province of Reggio Calabria, Southern Italy. Quantitative and qualitative data have been collected through the integration of three typical methods of social research: two techniques based on surveys, namely interviews with privileged actors, and a semi-structured questionnaire, and a technique based on non-survey data and the study of documents. Results can be useful to highlight pros and cons of the management of a cooperation project and to stimulate projects’ leaders on activating improvement processes.

The increasing environmental awareness of the actors of agro-food supply chains has led to the implementation of new tools to analyze the impacts generated during agricultural practices. The impacts depend not only on the production system but also on the farmer’s management choices, in terms of input allocation, and on the production site, in terms of soil and climate conditions. In order to assess the environmental impact of conventional and organic farming systems on citrus growing in Italy and Spain, a life cycle assessment method has been implemented. The results show the organic system to be more sustainable than conventional and they could be useful indicators for correcting and modifying agricultural practices.