Construcción de un prototipo a escala mediante el diseño de una planta de tratamiento de aguas residuales generadas por la Universidad Nacional de Chimborazo campus Edison Riera para el regadío de áreas verdes y descargas de baterías sanitarias.

Abstract

This research was carried out with objective of constructing a prototype to scale by designing asewage treatment plant generated from National University of Chimborazo “Edison Riera” campus, for irrigation of green areas and discharges sanitary batteries at University stadium. Flow measurement was performed with application of volumetric method and design flow calculation with a value of 1657.15 m3 /day. It characterized physic-chemically and microbiologically parameters Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), fecal coliforms and oils, and fats with the following results were determined: 183 mg/L, 520 mg/L, 5300 CFU/100 mL and 1.52 mg/L respectively which it is out standard. The treatment processes that are established to comply with permissible limit of Tables 2 and 3 of Ministerial Agreement 097-A. Once tested for treatability are: grid avoiding the entry of large solids that can affect system, a grease trap retaining the intake of oils and fats from domestic wastewater, an equalizer to homogenize concentrations contaminates, activated sludge (aeration and secondary sedimentation) helps to decrease the contraction of BOD5 and COD and chlorination allows elimination of fecal and total coliforms; Resulting in a BOD5 of 8 mg/L, COD 21 mg/, fecal coliforms 240 CFU/100 mL, and absence of oils and greases complying with regulations and satisfying the use of water as irrigation, obtaining a 96 % Efficiency in the treatment of prototype sizing. A final disposal is recommended for sludge generated by treatment for activated sludge.