This paper expounds the issue about the evolution of the dissolved oxygen concentration in synthetic wastewater with a circular rotary by setting a mathematical model. The mathematical model is based on the Lewis and Whitman relations to transfer oxygen to water, and includes the mechanistic models proposed by Lee, to determine the global oxygen transfer coefficient and the oxygen saturation concentration in water, as a function of the fifth power temperature. For this purpose, historical data from aeration experiments with two types of discs and two levels of COD concentration were compared. The equation allows to include the effect of the variation of the temperature and atmospheric pressure. Finally, through the data obtained, it's concluded that the estimation error is not affected by the type of disc, the COD concentration of the synthetic wastewater or by the interaction of both, a...

In the face of increasing water scarcity aggravated by climate change, the rainwater harvesting system is a technique that increases the water supply for various purposes. The objective of this research is to analyse the recent literature published on the rainwater collection system, for which the systematic review method was used. The main form of rainwater catchment are roofs, but the material used is important because it can affect the quality of the water. Some physicochemical parameters of rainwater may be within the standards for human consumption, but it is contaminated by pathogenic microorganisms, which represents a risk to public health if it is consumed without prior treatment, so it is mainly used for irrigation and flushing toilets. However, this system has been implemented mainly in rural areas to satisfy their basic needs, including human consumption, because these places ...

In the high mountain ecosystems of the Huaytapallana Regional Conservation Area (ACR-H) there are three species of flora (Krapfia macropetala, Gentianella scarlatinostriata and Senecio canescens) of social, economic, cultural and medicinal importance, however their population status and undefined local distribution make these species area more vulnerable to extinction. Therefore, the objective of this work is to determine the population distribution for repopulation purpose in the ACR-H from the potential distribution in Peru using Maxent algorithm and a local model developed with the Saaty pairwise hierarchy matrix, adding a soil sample for a better application of the final model. The results show that the Species Distribution Models (SDMs) have a high confidence because the Area Under the Curve (AUC) surpass 0.90. Otherwise, the local model is consistent by showing a Consistency Ratio ...

Forest fires are one of the main problems that affect biodiversity and forest heterogeneity, which are caused by human or natural activities and even driven by climate change. The objective of this study was to analyze the severity of forest fires with the NBR index (Normalized Burn Ratio) in highland areas of Peru, and evaluate the vegetative recovery of forest species in the affected area with the NDVI index (Normalized Difference Vegetation Index). As a result, it was obtained that the type of vegetation in the affected area is the Andean Pajonal, the level of severity in the study area ranges from low to moderately high, with low severity being the predominant one, which occupies 57,562% of the study area. The NDVI evaluation of 2 weeks before, 2 weeks after and 3 months after the event show that there is a vegetative regeneration of the vegetation cover, two weeks after the event in...

Potatoes have a high production demand in the world, but they are constantly under threat from germination to harvest due to pest infestation; for control, insecticides are used, which are highly polluting chemicals, systemic insecticides of the carbamate group due to their mode of action, with contact activity against different pests. This research sought to evaluate the influence of carbofuran on soil macronutrients in the District of Chongos Bajo, in the highlands of Peru. Through the experimental study method, with a quantitative research approach in a deductive process. We worked with a representative area of 10 m2 with 6 analyses of soil samples every 15 days in a period of 3 months. The results showed a loss value of 7.85% of total nitrogen, 14.05% of available phosphorus and 10% of available potassium in the period of 90 days, where there was a variation in the pH in water with a...

The artisan production of bricks has been a factor for the emergence of environmental conflicts in our country. For this reason, the objective of the investigation intends to evaluate and describe the environmental impacts through the CONESA methodology with respect to the brick manufacturing process in the Cormis—Jauja Population Center, for which 21 brick kilns were located in the field and the area was delimited. study area by occupation area. As a starting point, the earth extraction and firing stages were identified as those that generate the greatest environmental impact in the production of artisanal bricks. Of which, 7 aspects and 18 environmental impacts were identified, 3 of which are of severe importance and the rest are moderate in such a way that the depletion of the soil resource and the alteration of air quality are of greater importance with an assessment of − 63 and ...

Geoengineering attempts to remedy the climate crisis through the intervention of dynamic systems to mitigate future scenarios of water drought in agriculture. The provinces of the department of Junín were identified as having the meteorological and geographical conditions where precipitation should be generated for the benefit of agriculture. The meteorological data was obtained from SENAMHI for the period 2000-2020, cloud information derived from the GOES-16 satellite belonging to NOAA was used and the satellite images were resampled using the cubic convolution method to evaluate the cloud parameters under the bands (C05, C08, C10, C11, C13, C15 and C16) in areas with cloud altitude between 6-8 km in the Andes and in the eastern part between 5-7 km within the study area. From this analysis, favorable cloud clusters were identified in relation to the arid zones with extensive croplands ...

The study of the MK4 kiln reveals notable results, highlighting its efficiency in firing bricks through convection heat exchange, avoiding heat losses in kilns (1) and (2), achieving a final firing temperature of 995.6 °C in 160 min, this system not only accelerates the cooking process, but also contributes significantly to the overall efficiency, benefiting comprehensive operational efficiency not only improves the quality of the final product, but also promotes sustainability and profitability in the manufacture of bricks, indicating a faster and more uniform firing. Likewise, it demonstrates optimal results in its cogeneration system, having an energy efficiency of 60% in 160 min of cooking, generating a heat recovery temperature of 596.5 °C in each oven (3) and (4). In addition, the pollutants PM2.5 and PM10, through the gravitational force, the particles settle during the cooking ...

The study focuses on the design of the MK3 kiln as an eco-friendly solution to mitigate the pollution of (PM2.5 and PM10) generated by artisanal brick kilns. The MK3 kiln consists of three chambers constructed with construction and demolition waste (CDW), interconnected by lower ducts that aid in the continuous flow of heat and filter pollutants. Each kiln has a 5 cm opening in the dome to accommodate a copper industrial torch with a power of 1080 BTU/h, equivalent to 0.32 kW. Additionally, a 220V axial fan is installed in the chimney to supply the necessary air to the kilns through upper ducts, allowing complete combustion during the brick baking process. As a result, PM2.5 was measured at a quantity of 23 μg/m 3 , and PM10 emissions at 90 μg/m 3 , both of which do not exceed Environmental Quality Standards (ECA). Regarding the brick baking process, heat is recovered from the "combust...

This article provides an in-depth analysis of the efficacy of electrocoagulation as a method for the treatment of polyethylene terephthalate (PET) microplastics in synthetic wastewater, in response to the growing environmental concern caused by the contamination of aquatic ecosystems with microplastics, resulting from discharges from wastewater treatment plants. The research focused on the study of the influence of two key variables on the efficiency of the process, the electrical potential and the application time, a batch reactor specifically designed for this experiment was used. The results showed that electrocoagulation, when implemented for 60 minutes with an electrical potential of 30V, conditions identified as optimal in this study, manages to reduce the concentration of PET Mps from an initial concentration (CI) 0.28 g / L to a final concentration (CF) 0.005 g / L, which corresp...

The study focuses on the energy efficiency of the MK3 kiln through the cogeneration system, as a solution to reduce the use of natural resources that are currently used in the artisanal kiln to generate combustion in the production of artisanal bricks. The results in the brick firing process were obtained in the first 30 minutes, with a temperature of 410.8 °C, marking the beginning of the firing process, at 150 minutes, it reached 771.2 °C, generating efficient thermal insulation. At 240 minutes, the kiln reached 975.4 °C, evidencing the completion of the firing of the brick. The MK3 kiln stands out for its exceptional energy by using an innovative cogeneration system that is equivalent to a temperature of 486.5 °C, obtaining an energy efficiency of 50% in the continuous brick firing system, generating a positive impact on sustainable development., thus reducing fuel consumption in ...