Conference Agenda

The objective of this research is the hydrogeological characterization by Electrical Resistivity Tomography (ERT) of the hamlet La Viña. It has been perceived that the supply of drinking water is limited, affecting agricultural activities. The research approach is quantitative, applied, descriptive-exploratory and with an experimental design, with a population of geological formations and structures of the hamlet La Viña and with a sample of 7 points of electrical resistivity tomography (ERT), which resulted in the identification of formations such as Chúlec, Pariatambo with limestones and chevron folded shales (flanks N265/53 and N109/73), in NW/SE direction - 40°/60°; Quaternary alluvial deposits are defined by 2 streams with direction N280-N275. From the 7 ERTs, 3 lithostratigraphic units were defined, the first stratum as low porosity and highly resistive rock ranging from 1.6 Ω.m to 42.00 Ω.m with thicknesses from 1, 00 m to 60, 00 m and depths from 45, 00 m to 200, 00m. The second stratum has resistivities of 1, 12 Ω.m to 36 Ω.m with thicknesses of 3, 5 m to 60, 00 m and depths of 10, 00 to 140, 00 m consists of rocks with clayey soils of low permeability. The third stratum has resistivities of -0, 3 Ω.m to 29 Ω.m, with thicknesses of 2, 5 m to 20, 00 m, depth ranging from 10, 00 m to 160, 00 m; lithologically they are composed of porous rock formation and groundwater saturation.

This study aims to conduct a bibliometric analysis and a brief review of scientific documents addressing the removal of microplastics (PMs) from liquid effluents using electrocoagulation (EC) technology. The search strategy identified 89 papers in Scopus and 61 in WoS. The bibliometric analysis used 105 documents, while the review included 11 articles. The findings indicate a growing interest among researchers in the application of EC for PMs removal, as evidenced by the increasing number of publications in recent years. Many studies focus on the analysis of synthetic samples, identifying current density, pH, salt concentration, electrode spacing, and electrode material as the most influential parameters affecting both efficiency and process costs. Reported operational costs position EC as a competitive technology. However, further studies incorporating maintenance costs and waste management considerations are necessary to assess its economic viability fully. Future research should focus on optimizing operational parameters, investigating the interaction of PMs with other contaminants, scaling up EC systems, and integrating EC with other treatment technologies.

Atmospheric water uptake is influenced by relative
humidity and temperature, key factors in the performance of a
prototype designed and assembled with temperature and humidity
sensors and a condensation system based on the Peltier cell controlled
by Arduino. To evaluate its efficiency, 50 experimental tests were
carried out at the Abra “El Gavilán”, located at 3155 masl,
Cajamarca - Peru. The results showed that water generation is
directly influenced by relative humidity, reaching its maximum
performance in environments with values higher than 95%, while
moderate temperatures favor the condensation process. Likewise, it
was shown that the operation time and the number of Peltier cells
used play a key role in the amount of water collected, suggesting that
the system can be optimized and scaled to improve its efficiency.
Statistical analysis confirmed a positive correlation between relative
humidity and water production, supporting the viability of this
technology in regions with high humidity.

In recent years, water quality degradation has become a critical challenge. This problem not only threatens the well-being of millions of individuals, but also endangers biodiversity and the sustainability of sectors such as agriculture and industry. Therefore, the purpose of this research is to examine non-traditional technologies and procedures employed to address the challenges present in drinking water processing. A descriptive design non-experimental approach was used as part of a systematic review without meta-analysis. We relied on the PICO strategy and PRISMA methodology, which allowed us to select 26 articles, following the inclusion and exclusion criteria, published between 2019 and 2024, which were obtained from Scopus, SciELO, Redalyc and EBSCOhost databases. The results highlight key issues such as the need for constant evaluation, the presence of pathogens, turbidity and contamination of emerging components. Also, the alternatives were organized into natural methods, nanotechnology, computational systems and predictive models, disinfection technology, control system and sensitive perception, and water treatment technology. A comparison was made with WHO water quality standards and their impact on both the community and the environment was evaluated. It was concluded that the selection of treatments should be based on the characteristics of the water to be treated for efficient results, and the importance of their implementation for responsible sustainable development was also highlighted.

Particle transport plays a crucial role in industries such as mining, oil and gas, chemicals, and food processing, often leading to two-phase flows. This study investigates pressure gradients in a two-dimensional, laminar, incompressible flow with suspended particles between parallel plates, modeled using COMSOL Multiphysics 6.0 and the finite element method. The fluid phase is water, and fluid-particle interactions are modeled through bidirectional coupling in a time-dependent framework.

Key parameters examined include volume fraction (αpαp​), relative particle size (RSp), Stokes number (St), and particle release position. Results reveal three distinct flow zones: (1) an acceleration zone, where the pressure difference increases to a peak, (2) a transition zone, where it declines, and (3) a stabilization zone, where it becomes negligible.

Higher volumetric particle flow rates significantly impact pressure gradients, while a decrease in relative particle size leads to a greater concentration of smaller, denser particles, showing an inverse proportionality effect. Larger Stokes numbers result in greater particle independence from the fluid, delaying pressure gradient stabilization. Particle release position strongly influences results, with the highest impact occurring at the center. Notably, the sum of pressure differences from center and edge releases approximates that of a uniform inlet release.

These findings provide insights into fluid-particle interactions in laminar regimes, enhancing the understanding of pressure gradient behavior under varying conditions, with relevant industrial applications.

Sugarcane straw is an agro-waste that can be used as fuel in thermochemical processes but it requires the modifications of their properties to mitigate some the negative issues that limits its use as fuel such as high moisture content, low density, fibrous structure, considerable amounts of alkalis and chlorine that cause slagging, fouling, and greenhouse emissions.

This research presents the effects of a combined process developed for improving sugarcane straw properties, which integrates cutting, washing, and torrefaction pretreatments. The residue was chopped (20 mm), then a water washing pretreatment was applied testing three temperatures (20 °C and 80 °C), two residence time (10 min, 20 min) and two stirring conditions for a concentration of 3.33 %, being selected the washing condition that showed the highest removal of ash, alkalis, Cl and S. being found the condition carried out at 80 °C, 20 min and continuous stirring. Finally, the washed residue was torrefied at 250 °C for 20 minutes in a controlled oxidizing atmosphere within a reactor.

The effectiveness of the treatment applied was determined by ultimate and elemental analysis, heating value, and ash analysis, according to ASTM standards. The combustion behaviour, the tendency for ash deposition, and corrosion and potential emissions was carried out by calculating prediction indices.

The results obtained show the improvements achieved in the properties of sugarcane straw, enhancing the possibilities of its use as fuel in thermochemical processes, which is why the application of the treatment developed in this research is recommended.