The monitoring of the oxidation ponds is a verification activity on the efficiency of the environmental treatment. The aim of the study was to determine the biodegradability coefficient in the Angostura-Limón and Yaurilla oxidation lagoons, Ica-Peru. From April to May 2022, a sampling of the influents and effluents was carried out, determining the biochemical oxygen demand (BOD5,20 wastewater) and the chemical oxygen demand (COD). With the physical-chemical parameters, the relationship of the biodegradability quotient was established: CB = BOD5.20/ COD. In the Angostura-Limón oxidation pond, the concentrations in influents and effluents were: BOD5,20 = 315.0 and 308.1 mg·L-1; COD = 795.0 and 811.7 mg·L-1 while, in the Yaurilla oxidation lagoon they were: BOD5.20 = 268.8 and 303.6 mg·L-1; COD = 728.30 and 795.7 mg·L-1. The concentrations of BOD5,20 and COD exceeded the maximum permi...

The objective of the study was to describe the sustainable treatment proposal for the evisceration of hydrobiological waste from the Modelo market in Ica, Peru. The study was carried out from June to September 2021 and evaluated the selection of the gutting of the following species: jack mackerel (Trachurus murphyi Nichols, 1920), bonito (Sarda chiliensis chiliensis Cuvier, 1832), mullet (Mugil cephalus Linneaus, 1758) and mackerel (Scomber japonicus peruanus Linneaus, 1758), which are sold for human consumption. A three-stage process was proposed: 1st) pre-cooking of the hydrobiological residues, 2nd) preparation of the bacterial inoculum, and 3rd) preparation of the hydrobiological residues silage. Four experimental treatments based on milk, MRS (Man Rogosa Sharpe) agar and lactic acid bacteria substrate are proposed. The procedure of the described hydrobiological silage allows benefit...

The objective of the study was to describe the environmental cost of the biodegradable transformation coefficient in effluents from oxidation ponds, Ica, Peru. In January and February 2023, effluents from the oxidation ponds of Angostura Limón, Yaurilla and Pueblo Nuevo were sampled. Biochemical oxygen demand (BOD5.20) and chemical oxygen demand (COD) were determined where the concentrations were compared with the maximum permissible limit of Supreme Decree 004-2017 MINAM - Peru. With the data, the environmental cost was estimated by a quotient between the cost of assessment (COA) and the regulatory prevention cost (CONP). The values were BOD5.20 = 203.1 mg.L-1 and COD = 405.0 (Angostura Limón), BOD5.20 = 273.1 mg.L-1 and COD = 450.8 mg.L-1 (Yaurilla) and BOD5.20 = 366.5 mg.L-1 and COD = 628.0 mg.L-1 (Pueblo Nuevo). The environmental cost was equal to 0. The BOD5.20 and COD values exce...

In the oxidation ponds, there is an alarming accumulation of sedimentable organic matter, despite the absence of direct tributaries. Although the presence of potentially contaminating elements is suspected, their origin and repercussions still require clarifi cation. It is necessary to determine the organic matter to assess the value of sedimentat ion in this context. Th e study aimed to evaluate the concentration of sedimentable organic matter without effl uent discharge in the Parcona Lagoon, Ica-Peru. Th e Walkley-Black method was used to determine the organic matter in the sediments. After preparing the sample with specifi c reagents, absorbance at 590 nm was measured using a DR-5000 UV-vis spectrophotometer, with reference standards for calibration. A concentration was found at the fi ve sampling points of 3.87; 4.13; 2.96; 3.44; and 2.21 mg/kg, respectively. Th e concentration of o...

The purpose of the study was to describe the modality of the research hotbed as extracurricular work in university education. From June to September 2021, the research hotbed project "Formando y Formando" was carried out for teachers and students of the Universidad Nacional "San Luis Gonzaga", Ica, Peru. The academic areas that participated were: Pharmacy and Biochemistry, Environmental and Sanitary Engineering, as well as Dentistry where the students corresponded to the academic cycles of 1st, 6th and 8th. Three levels of training instructions were considered: 1st) identification of what to do, 2nd) execution of what to do and 3rd), communication of what to do. The research seedbed (SI) was carried out from the extracurricular work in university education (TEFU) through a development model that consisted of five instructions: title, introduction, objectives, measurement and proposed imp...

The aim of the study was to describe the intellectual function of working memory capacity (WMC) in university students from a case study. The study was conducted from June to July 2022 and in a random probabilistic way, six research seed students belonging to the National University "San Luis Gonzaga" (Ica, Peru) were selected. The WMC analysis was done through two types of didactic games (DG) with different degrees of complexity: 1st) the Divinance of colored cubes and 2nd) the marking and recognition of three sea shells between a total number of 100 shells. Each DG was replicated twice the first for stimulation of mental concentration in the face of the WMC analysis. The DG was replicated twice and in the case of the second, the immediate time (s) of recognition was measured where the comparison of the medians was, through the U-Whitney test. It was observed that the time of each repli...