Diseño de un sistema de tratamiento de aguas residuales para la parroquia San Andrés del cantón Guano.

Abstract

A sewage treatment system was designed for the parish San Andres of Guano canton aiming to fulfill the environmental regulation and obtaining fresh water with the parameters considering the allowed limits of Unified Text of Secondary Legislation of the Environment Ministry. The components of the fluids turn variable due to the activities of the inhabitants for instance it was taken a mixed sample made up of simple samples for two weeks; the physical, chemical and microbiological characterization, allowed to identify the following parameters found out of the rate according to the environmental Quality Norm for Sewage: Resource Water, Book VI, Annex 1: Color, Blur, Conductivity, total Nitrogen, Silver, Barium, Oxygen Chemical Requirement, total Coliforms and fecal coliforms. Purifying test were performed by means of the test of the jug with Poly chlorine of aluminum and Chemfloc, for the elimination of pathogen microorganisms the hypo chlorine of calcium. When identifying the design variables, the equipment was dimensioned according to the physical-chemical treatment of the sewage water which are: Entrance channel, grid system, IMHOFF tank, mixing tank, sand and gravel slow filter, disinfection tank, and a drying pot. The chosen design was validated with the results of the final characterization of the sewage water and the removing percentages parameters week one and two are: Color 97,37;98,72%, Blur 99,65;99,85%, Conductivity 71,26;74,31%, Total Nitrogen 89,45;92,06%, Silver 96,5%, Barium 95,13;98,94%, Oxygen Biochemical Requirement 94,86;89,09%, Oxygen Chemical Requirement 98,69;99,42%, total and fecal Coliforms 99,93%. The implementation of the sewage system is recommended to avoid the pollution of the river nearby San Andrés parish.