‘‘Estudio de pre factibilidad del sistema de alcantarillado sanitario y planta de tratamiento, en la cabecera parroquial de Cacha del cantón Riobamba provincia de Chimborazo”

Abstract

The wastewater generated in homes must be collected and treated, to avoid problems of unsanitary conditions and environmental contamination. It is for this reason that it was proposed to provide a solution to the problem of the Cacha Machángara community since currently there are problems of saturation of the system (septic tanks), generating bad odors, soil contamination that put in doubt the effectiveness of the system solution. For this reason, the main purpose of this technical qualification work is to carry out the studies of Sanitary Sewerage and Treatment Plant, taking into consideration the technical regulations. The collectors were designed with a minimum diameter of 200mm with PVC corrugated pipe with a total length of 2418.46m; The revision wells have a maximum separation between them of 100m with a total of 34 wells ranging in depth from 1.20m to 5.0m. The treatment plant consists of a grating chamber with a sand trap to prevent large objects from preventing its operation; the Imhoff tank with the drying bed is part of the primary treatment in order to eliminate suspended solids; the trickling filter, the secondary settler and the disinfection tank are part of the secondary treatment with the help of microorganisms transform new biodegradable cells. To avoid damage to the environment, the environmental impact study of the area was carried out during the project execution stages. Likewise, the project's referential budget was determined through the unit price analysis with an amount of $ 156,315.81. Finally, the financial analysis was carried out with a Cost / Benefit profitability of $ 1.32, the project being viable from the economic and functional point of view of the system.