Diseño del Sistema de Tratamiento de Aguas Residuales en la Planta Procesadora de Lácteos Asociación Unión Libre

Abstract

It was designed a waste water treatment plant in Unión Libre Association Dairy Processing Plant, 10 Agosto Parish, Pastaza province, in order to fulfill with environmental standard for public wastewater discharges. The research was initiated with the characterization of was tewater coming from different stages of Dairy Plant obtaining the following parameters which were out of specification, pH (6,46), turbidity (1786,75NTU), total solids (15258 mg/L), sediments solids (2091 mg/L), BOD 5 (9657,47mg/L), fats and oils (2583.8 mg /L) and COD (16854 mg/L). Subsequently, treatability tests were performed which determined that it is necessary to add 0,3 g/L of lime and 1,5 ml of poly aluminum chloride 25%. In engineering design it was determined that the treatment plant will consist o f the following processes: a system of manual grids arranged on a channel that convey water to treat to a grease trap with the capacity to 152, 74 L then to reach a concrete flocculator of 5 m 3 and to finish in a concrete sedimentation tank of 14 m 3 , these stages are able to reduce turbidity values by 98%, Solids by 96%, BDO 5 by 97%, fats and oils by 97% and COD by 98%. It is recommended to implement the wastewater treatment system in Unión Libre Association Dairy Processing Plant in order to preserve the e nvironment of the parish.