Propuesta de tratamiento de aguas residuales domésticas para la ciudad de Guaranda, provincia Bolívar

Abstract

Guaranda city does not have a domestic wastewater treatment system, therefore, this project presents a purification proposal, which was first developed with a field visit to the discharge points, and then plan the capacity of the daily flows and composite samples at each site, with the respective laboratory analysis. The most representative was found to be Negroyaco with 21.05 L / s. From the physical, chemical and microbiological characterization, the indicators of contamination in biodegradable organic matter (BOD) and non-organic and inorganic matter (COD) are in the order of 220 mg / L and 390 mg / L, respectively. Based on the biodegradability coefficient, the viable treatment is oriented to biological processes and according to the technical, social and environmental analysis applied to biotechnologies, the best options were UASB reactor, anaerobic lagoon and anaerobic filter. Finally, with the application of the Optimal Technology Index (ITO), the UASB reactor was the selected treatment.