Conference Agenda

Visual comfort is a key factor in the productivity and health of workers in sample processing laboratories, where adequate lighting prevents visual fatigue and improves accuracy in technical tasks. This study evaluated the effectiveness of an intelligent lighting control system in the laboratory of HNCASE - ESSALUD, Arequipa. A pre-post intervention experimental study was designed, measuring light levels with luxmeters and simulations with DIALUX software. Sixty-two workers were surveyed about their visual perception using a Likert scale. The data were analyzed with statistical tests to evaluate significant differences. The results indicated a significant increase in average illumination: the production area went from 114 lux to 647 lux and the urinalysis-parasitology area went from 199 lux to 755 lux, exceeding the minimum standard of 500 lux according to NTP EM.010. In addition, 96.77% of workers reported significant improvement in visual comfort (p < 0.001), along with reduced discomfort and perception of eye fatigue. These findings support the importance of lighting control to improve visual ergonomics and well-being in technical environments, agreeing with previous literature linking adequate lighting levels with optimal work performance. As a limitation, the study was confined to a single laboratory and limited period, recommending multicenter extensions and long-term follow-up. In conclusion, lighting control technology represents an effective strategy to enhance visual comfort and efficiency in laboratories.

Peru is a country with vast biodiversity, significant citrus crops, and abundant citrus peel waste, which poses a challenge in terms of its use through essential oil extraction methods that minimize costs and are more energy-efficient and environmentally sustainable. In this study, two essential oil extraction technologies (traditional steam distillation and the Clevenger method) were compared in orange, tangerine, and tangelo peels with the aim of evaluating performance and finding the optimal parameters for the process. Different controlled tests were carried out with the two methods, measuring the volume of oil obtained, and a difference in the yield of the methods was found. The Clevenger method showed a 6.08% higher yield than the classic method (0.24%) in oranges, with similar trends observed in tangerines and tangelos. Consequently, it has been confirmed that the Clevenger method is more efficient for extracting essential oil from citrus waste, which represents an opportunity for industries with growth potential such as pharmaceuticals, cosmetics, and food due to its greater efficiency and sustainability.

This research presents a technical and experimental analysis of the energy efficiency of alkaline electrolysis systems for hydrogen production, evaluating the impact of the voltage per cell and the number of cells on the overall performance. Through simulations in Python and tests with different configurations, an inverse trend between efficiency and voltage per cell was identified, while increasing the number of cells showed a positive effect on the overall system efficiency. The experimental results were supported with simulated efficiency plots and contour maps that allowed visualization of the optimal operating zones. The real tests showed that configurations with low voltage per cell can reach efficiencies higher than 20 %, while systems operating at 4.0 V show efficiencies lower than 13 %. It was also shown that efficiency can exceed 50% when operating with more than 150 cells at low voltage, which highlights the potential for redesigning current systems. The problem statement and its background contextualize the role of hydrogen as a key energy carrier in the transition to clean sources. It is argued that the optimization of processes such as electrolysis is critical to replace fossil fuel-based production, reduce carbon emissions and strengthen global energy security.

The present Investigation analyzes the Geomechanical Behavior of the Polloc Limestone Deposit, located in the Encañada District, Cajamarca Province, whose extension is 10 hectares. The purpose is to define the Design of the Exploitation Method of the limestones belonging to the Pulluicana Group (Yumagual Formation) of the Upper Cretaceous. 6 Stations were analyzed to define the Geomechanical Behavior of the Reservoir, using RMR89, RQD, RCU and GSI parameters, determining that the Rock Quality according to the Deere's RQD is Medium for stations EG 3 and EG 5 and Good for stations EG 1, EG 2, EG 4 and EG 6. According to Bieniawski's RMR89 Classification, the Rock is of Regular Quality at station EG 5 and Good at stations EG 1, EG 2, EG 3, EG 4 and EG 6. According to the Geological Resistance Index GSI, the Rock is of Good Quality for Stations EG 1, EG 2, EG 3, EG 4, EG 5, EG 6. From the results obtained in the RocData Software, cohesion between 0.718 and 2.074 was calculated. MPa; and friction angle between 45.22° to 49.32°, determining a compact and hard rock. The DIPS software reported low percentages of flat breakage and wedges. With the results obtained, we designed the Exploitation Methods for Ascending Staggered Banks, whose design parameters are bank height 7m, bank width 6m, working angle 75° and final slope angle 42°.

In this research, a technical analysis of soil bioengineering was conducted as an alternative for slope stabilization and the control of water erosion, a frequent problem in civil and geotechnical engineering works. The main objective of the study was to evaluate the influence of vegetation on slope stability, considering both the hydrological and mechanical effects that roots and vegetation cover exert on the soil. To this end, a review and analysis of geotechnical principles related to slope stability, soil classification, and the mechanisms of natural reinforcement provided by vegetation were carried out, as well as their interaction with surface runoff. Likewise, the positive and negative factors associated with the use of plants on slopes were examined, highlighting their contribution to erosion reduction, increased shear strength, and improved soil behavior under rainfall conditions. Finally, it was concluded that soil bioengineering represents a technically viable and environmentally sustainable solution for slope stabilization, provided that it is applied considering soil characteristics, slope geometry, and the type of vegetation used.

Cajamarca, Peru's main milk-producing region with around 20% of national production, stands out for its favorable geography and industrial livestock tradition. Improving its efficiency in different scenarios and evaluating its long-term performance in larger-scale systems is a primary objective. The use of microalgae in reducing pollutants is essential for treating dairy industry effluents, especially in critical parameters such as Biochemical Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD). This study analyzed the effectiveness of Scenedesmus sp. in a bioreactor, using treatments with different proportions of microalgae over a period of 21 days under controlled laboratory conditions. Treatment 1 (T1) yielded significant results in contaminant remediation, achieving a 30.20% reduction in Chemical Oxygen Demand (COD), from 1011 mg/L to 707.33 mg/L; and a 30.15% decrease in Biochemical Oxygen Demand (BOD), from 606.67 mg/L to 424.33 mg/L. In addition, it was observed that the use of Scenedesmus sp. allows the photosynthetic capacity of microalgae to be harnessed, generating oxygen and contributing to environmental balance. The simplicity of the bioreactor design used and the relatively low costs associated with microalgae cultivation make this technology a sustainable solution. The findings highlight the potential of Scenedesmus sp. as a sustainable, economical, and effective solution. However, further research is essential to optimize its application in industrial contexts, improve its efficiency in different scenarios, and evaluate its long-term performance in larger-scale systems.