Conference Agenda

In this study, the efficacy of a tara shell and sawdust biofilter in removing Cu, Zn, and Fe from acid mine drainage (AMD) (initial pH 3.66–3.74) was evaluated. The influence of contact time (0, 30, 60, 120, and 180 min) and relative material dosage (82.5/82.5 g and 41.25/123.75 g of sawdust/tara; total 165 g in 1.5 L) on the results was investigated. The tests were carried out in triplicate (n = 3) and the concentrations were determined by atomic absorption and subsequently the removal percentages were calculated at 180 min, Cu reached 96.60%, 97.01% and 99.94% (minimum Cf = 0.018 mg / L), while Fe achieved 95.60% and 67.12% in the evaluated dates; Zn showed moderate efficiencies of 24.89%, 49.26% and 12.93%, conditioning the selectivity Cu > Fe > Zn. The optimal combination for Cu with 180 min and 41.25 / 123.75 g of biomass ratio, evidence that the increase in time improves the removal to a point close to equilibrium. It is concluded that the tara-sawdust biofilter is a low-cost and highly effective alternative to reduce Cu and Fe in AMD, requiring pH and proportion adjustments to maximize Zn capture.

The global defense industry is currently challenged to modernize its production processes under principles of environmental sustainability, operational efficiency, and worker safety. In this context, many ammunition factories are shifting to lead-free production models, in line with the Sustainable Development Goals (SDGs) and international standards. This study presents LineFAME, a design method applied to the reengineering of the lead-free bullet production line at the Army Weapons and Ammunition Factory of Peru (FAMESAC). The project begins with a diagnosis of the current system, marked by heavy lead use, a process-oriented layout, extended production times, dependence on imported materials, and occupational health risks. The proposal consists of two main phases. Phase one focuses on obtaining 90/10 brass bars through internal melting, extrusion, drawing, and heat treatment. Phase two configures a continuous, efficient production line within a single facility, using a product-based layout. This redesign reduced production time from 29 to 17 hours, minimized machinery use and material waste, and lowered personnel requirements. Validation included hardness testing, metallographic analysis, ballistic trials, and a survey of technical staff, which confirmed strong acceptance. LineFAME emerges as a viable and replicable model aligned with international standards, offering a path toward sustainable, efficient, and autonomous ammunition manufacturing.

Abstract– The purpose of this article was to find the influence of the practices of the green economy and social responsibility on environmental sustainability, its research method was quantitative, non-experimental, explanatory and transversal, its population was 125 workers from Agrícola Cerro Prieto, a probabilistic sample of 77 participants was taken to carry out the survey using 3 questionnaires on a Likert scale, validated and reliable. The results when applying multiple linear regression showed a Sig. <0,05 and t-Student >1,96 confirming that the predictor variables do influence the dependent variable applied to the study unit. It is concluded that the green economy and social responsibility have a positive impact on the environmental sustainability of the agricultural sector in Peru, however, their incorporation is restricted, requiring comprehensive policies that eliminate the differences between discourse and action for an authentic effect.

Keywords: Green economy, social responsibility, environmental sustainability, agricultural sector.

Underground mining is one of the most complex and hazardous working environments due to the natural instability of the terrain and variable geological conditions. In this context, rockfalls remain a leading cause of fatal accidents. Despite advancements, 50% of mining-related deaths in 2024 were due to rockfalls, according to Fernando Borja, Director of the Mining Safety Institute (ISEM), underscoring the urgent need to improve support systems in underground operations.

This study aims to identify the most appropriate support type based on the characteristics of the rock mass, including strength, degree of fracturing, and geomechanical conditions, using classification tools such as GSI, RMR, and the Q-System. Beyond traditional support analysis, the integration of technological and sustainable innovations is proposed. These include instrumented bolts with FBG sensors for real-time monitoring of deformations, and eco-friendly shotcrete incorporating recycled additives to reduce environmental impact.

Together, these solutions seek to enhance the safety and efficiency of underground operations, offering a technical approach that ensures structural stability while prioritizing worker protection. The proposal reinforces a commitment to safe, modern, and socially responsible mining engineering practices that align with current demands for sustainability and risk reduction in the mining sector.

In industrial components subjected to high temperatures, it is crucial to evaluate the microstructural changes that occur during their service life to predict the remaining useful life without altering their operating condition. The non-destructive technique of metallographic replication constitutes an excellent alternative for its characterization. Three methods were compared to obtain metallographic replicas that allow observing the typical microstructural details in ferrous alloys. Commercial replicating materials of ethyl acetate on a reflective aluminum support (Transcopy brand), replicas with silicone rubber (RepliSet brand) and low-cost ASA 200 veiled roll ethyl acetate photographic film were selected. Metallographic replication was applied to ferrous alloys surface prepared by roughing, polishing, chemical and electrolytic etching. The microstructural details in each specimen and its respective replicas were evaluated by optical microscopy. The results indicate that metallographic replicas reveal most of the microstructural details obtained with conventional (destructive) metallographic inspection. Replicas made with ASA 200 frosted ethyl acetate photographic film exhibit excellent resolution for viewing microstructural details, with optical magnifications of up to 1000X in the samples studied; similar results were obtained with ethyl acetate replicas on reflective aluminum supports and with silicone rubber. However, silicone rubber replicas have limitations in revealing details in fine microstructures.

El creciente interés por relacionar el bienestar económico con la sostenibilidad ambiental, ha impulsado la necesidad de incentivar la creación de emprendimientos como vía para la innovación y sostenibilidad. Este estudio ofrece una Revisión Sistemática de la Literatura (RSL) guiada por el método PRISMA 2020, con el objetivo de fortalecer el perfil emprendedor, apoyado por la educación, para impulsar modelos de negocios innovadores y sostenibles en América Latina. Se revisaron 43 estudios publicados entre 2019 y 2024 en la base de datos académica Scopus. Los resultados revelan que los emprendimientos innovadores y sostenibles en América Latina son desarrollados por las competencias emprendedoras, que brinda motivación y generan soluciones a los desafíos económicos, sociales y ambientales, a pesar de las barreras de implementación. Esta revisión destaca la importancia de adoptar soluciones robustas de educación para incrementar el compromiso por emprender sosteniblemente, y sugiere áreas clave para futuras investigaciones en este campo.