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Item type:Publication, The combined use of life cycle assessment and data envelopment analysis to analyse the environmental efficiency of multi-unit systems(Elsevier, 2022-01-01)The combination of life cycle assessment (LCA) and data envelopment analysis (DEA) methodologies has been employed over the past years to assess the eco-efficiency of a wide spectrum of production systems. This chapter presents a critical review on current practices of the joint application of LCA+DEA, as well as point towards the methodological challenges and opportunities for the future. Considering the growth of the method in the past decade, it is plausible to assume that an increasing number of studies will continue to appear in the literature. The development of guidance or standardisation reports would constitute a step forward in terms of providing advice on how recurrent methodological issues (e.g. uncertainty, selection of impacts categories or DEA models, etc.) should be addressed in LCA+DEA. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Proposal for used electronic products management in Mexicali(Elsevier Inc., 2022-05-01)Mexicali, a Mexican city located near the US-Mexico border, has faced several challenges related to adopting an integrated e-waste management system. Thus, the main objective of this work is to propose a new system to be implemented in phases. The current system is evaluated using several methodological approaches including field studies, surveys, interviews, and quantitative modeling via material flow analysis. We suggest the need to properly integrate both the formal and informal sectors to achieve the optimal system that mitigates environmental impacts while preserving the positive social and economic traits of the current system. Thus, without supplanting the current reuse, refurbishment, repair and maintenance practices, a hybrid system is proposed, based on a centralized facility that primarily handles those parts or materials that create environmental impacts and health hazards if mishandled. Furthermore, a decentralized transition phase toward the new system is recommended. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Application of fuzzy BWM-CoCoSo to time-cost-environmental impact trade-off construction project scheduling problem(Springer Science+Business Media, 2022-04-05)The economic growth and the development of construction industry in several countries have had detrimental impacts on environment and natural ecosystems. Therefore, environmental impact assessment studies of construction projects have received more attention from governments and organizations. In other words, minimizing environmental impacts have been taken into consideration along with other common project goals. This study aims to identify and evaluate the environmental impacts of construction projects and ultimately determine the most favorable implementation modes of activities so that each project activity is executed with the least possible cost, duration, and environmental effects. The environmental consequences of projects are identified in three biological, physicochemical, and socioeconomic environments. Also, the positive and negative environmental impacts are assessed using the Leopold matrix method. Then, the importance weights of the project objectives including cost, time, negative environmental impacts, and positive environmental impacts are calculated using the fuzzy BWM method. Finally, the various modes of executing each activity are prioritized and ranked by using the fuzzy CoCoSo technique regarding the weighted objectives. The activity execution mode with the highest ranking indicates the best possible implementation mode of that given activity according to cost, time and positive environmental impacts as well as negative environmental impacts. The proposed method is implemented in a remote rural water supply construction project for efficiency evaluation. This study directs project managers to identify and assess the environmental consequences and impacts of construction projects in addition to considering the other two common project objectives. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Environmental performance of rainbow trout (Oncorhynchus mykiss) production in Galicia-Spain: A life cycle assessment approach(Elsevier BV, 2022-09-24)Aquaculture is an increasingly important supplier of food worldwide. However, due to its high dependence on agricultural and fishing resources, its growth is constantly constrained by environmental impacts beyond aquaculture production systems. Within the European Union, Spain accounts for approximately 25 % of total aquaculture production, which implies that environmental impacts in rivers and marine ecosystems must be monitored to understand the role of aquaculture systems. While studies on the environmental performance of mussels or turbot production have been reported in the literature, Spanish rainbow trout (Oncorhynchus mykiss) has not received much attention despite its relative importance. In this sense, a Life Cycle Assessment (LCA) study of rainbow trout produced in a medium-sized plant in Galicia (NW Spain) was carried out in the present study. The study considered the production of round weight trout, as well as some commonly produced processed products, including filleting. The life cycle modelling included a high level of primary data in the foreground system. In addition to the widely considered environmental impact categories for this activity (e.g., global warming potential, terrestrial acidification and freshwater eutrophication), the recent proposed antibiotic resistance (ABR) enrichment impact category was included to explore the potential impact of antibiotic release in freshwater microbiota. The results highlighted the high contribution of aquafeed to most impact categories, due to upstream agricultural and fishing processes, whereas farm operation was responsible for the larger part of the impact in freshwater eutrophication, mainly due to direct emissions of nutrients from fish feeding. Amoxicillin release to recipient water bodies was the main driver to the ABR enrichment category. In contrast, the processing phase (i.e., gutting, freezing and packaging) showed low environmental burdens. In order to improve the environmental performance of the rainbow trout production system, decreasing the feed conversion ratio (FCR), shifting to renewable energy, using low environmental burden ingredients in aquafeed, and alternatives to control diseases without antibiotics could be considered. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Avocado production in different biomes throughout Peru: do differing cultivation practices translate into differences in environmental impacts?(Springer, 2025-11-26)Purpose Avocado production in Peru takes place in different biomes and under different agricultural systems (e.g., conventional, organic, or agroforestry). Therefore, it is important to understand differences in the environmental profile of avocado production within the diversity of these cultivation systems. Hence, the main objective of the study was to conduct a cradle-togate attributional Life Cycle Assessment of avocado production in Peru by small and medium-sized producers, under multiple scenarios to provide insights for enhancing environmental performance and including a sensitivity and uncertainty analysis. Methods Primary data were collected from 80 small and medium-sized producers (i.e., 355 ha) for the year 2023 to build the life cycle inventory, which was supported by the ecoinvent database. SimaPro was used to integrate inventory flows and assessment methods. The latter include a range of methods, such as IPCC 2021 to estimate GHG emissions, and AWARE to calculate water scarcity impacts, for which Peruvian-specific characterization factors (CFs) were incorporated. Biodiversity impacts were evaluated through the LUIS biodiversity footprint for land-use intensity and the product biodiversity footprint to identify broader biodiversity loss drivers. Results and discussion The results demonstrate differences in environmental impacts between regions, based on type of production system, variety of avocado, altitude or ecological region, especially in terms of consumptive water use (i.e., scarcity) and biodiversity impacts. Water scarcity values ranged from 1.2 to 764 m3eq/ kg depending on regionalized CFs. Biodiversity assessment methods suggest that avocado cultivation poses greater risks to the Amazon rainforest and the Andean Highlands compared to the coastal desert. Regarding GHG emissions, results ranged from 156 to 728 g CO2eq/ kg depending on the variety, within a middle range for fruits and vegetables as compared to the global literature. Agroforestry systems showed lower impacts compared to monoculture systems, particularly thanks to carbon sequestration. Conclusions and recommendations. For both water scarcity and biodiversity, results have shown to be highly site-specific, and spatial resolution is needed for decision-making on a case-to-case basis. GW impacts also showed relevant variability, especially when comparing agroforestry systems in the Amazon basin, where GHG emissions were considerably low thanks to enhanced carbon capture, with other production systems across the country. In any case, GHG emissions were found to be in the lower range as compared to previous avocado studies in scientific literature. Optimizing fertilizer use and adopting efficient irrigation methods, while improving irrigation measurements, were identified as key strategies to reduce environmental burdens across all systems.2