Diseño de un sistema de tratamiento de aguas residuales para la parroquia de Santa Fé, cantón Guaranda, provincia de Bolívar.

Abstract

A system of wastewater treatment in the parish of Santa Fe, of Guaranda CANTÓN, Province of BOLÍVAR is designed to reduce contaminants present in said wastewater and comply with the provisions of Book VI TULSMA 2015, Annex 1, Table 10, Limits discharge to a body of fresh water optima to be discharged to the receiving body (Chimbo river). The design flow of wastewater and the physic- chemical and microbiological characterization was determined, following the procedures referred to in Standard Methods for the Examination of Water and Wastewater. The results of the initial characterization shows the following parameters outside the norm: Total Suspended Solids 389.37 mg/L, Total Nitrogen 68.34 mg/L , Barium 3.46 mg/L , BOD5 408.94 mg/L, COD 740.61 mg/L, Total Coliforms 16140 MPN/100mL, Fecal Coliform 12680 MPN/100 mL, Turbidity 315.25 NTU, Dissolved Oxygen mg/L. Then treatability tests were performed in which the following optimal dosages were obtained: Polyvinyl Aluminum 3.5 ppm, ionic auxiliary CHEMFLOCN-100 O.8 ppm and calcium hypochlorite 6 ppm, achieving decrease all non- standard parameters below the permissible limits so we have: Turbidity 0.75 NTU, Total Suspended Solids to 25.00 mg/L , Total Nitrogen to 12.7 mg/L, Barium to 0.53 mg/L, BOD5 to 22.38 mg/L , COD to 36.40 mg/L, Total Coliforms to < 1 NMP/100 mL, Fecal Coliforms to <1 NMP/100 mL System of wastewater treatment for the Santa Fé parish consists of the following: grids, rectangular weir, conventional clarifier, Parshall channel, mixing tank, sand and gravel slow filters, and disinfection tank.