Estado del arte para la determinación de las fracciones de la Demanda Química de Oxígeno como aplicación en aguas residuales en la Provincia de Cotopaxi año 2020.

The main rivers of the Cotopaxi Province are contaminated by various human activities, which affects the health of the population, since many people who live on the banks of the bodies of water of the Province, directly use this resource to carry out various activities. In spite of this, the treatment that wastewater receives is inefficient, which is why it requires a detailed characterization of the components of the wastewater. Therefore, a methodological proposal was developed to determine the fractionation of the Chemical Oxygen Demand through the Activated Sludge Model (ASM1). The application of a combined methodology was proposed: physical- chemical, developed by the Dutch Foundation for Applied Research (STOWA Protocol) by its acronym in Dutch, and a biological methodology (Respirometry), through which procedures were expressed to determine the main fractions of the Chemical Oxygen Demand. As there is no standard methodology, data were collected from studies on COD fractionation, applying the STOWA Protocol and respirometry methods in several treatment plants. To represent the effectiveness of the STOWA Protocol, biokinetic graphs were made for which the most representative values were taken, expressed by Sanchez, Ribes et al (2017), Baquero et al (2016) and Vazquez et al (2013), jointly using standard stoichiometric values presented by the ASM1 model. Also, percentages estimated by the International Water Association were compared, based on the presence of the fractions of the Chemical Oxygen Demand in untreated wastewater, with percentages presented by authors such as: Kappeler and Gujer (1992), Sozen et al (1998), Pluciennik, Jakubaszek et al (2017) and Ekama et al (1986) which used respirometry methods. The results obtained show a significant variation between methodologies, this is due to the diverse composition of the wastewater and the specific conditions in which they are found, in the biokinetic graphs was observed a percentage of error by adjustment of variables, however, the methods analyzed are considered applicable to determine the fractionation of COD because the graphs did not show negative values.

• Main Author: Real Gaibor, Morella Malu (author)
• Format: bachelorThesis
• Language: spa
• Published: 2020
• Subjects: AGUAS RESIDUALES; MICROORGANISMOS AEROBIOS; ACTIVIDADES ANTRÓPICAS; MEDIO AMBIENTE
• Online Access: http://repositorio.utc.edu.ec/handle/27000/7074