Diseño de un sistema de tratamiento de aguas residuales para la fábrica lácteos San José del cantón Píllaro.

Abstract

It was designed a treatment system for waste-water at the Dairy Company San José located at Píllaro canton, Tungurahua province ;due to the great loads of waste water directly flushed into the sewer without no treatment ,breaching so with current environmental laws in the country. For the development of this study, it was necessary to carry out measure of the flow during a whole week along the 9 working hours with intervals of 10 minutes each. By stating the flow, the volume of waste water generated daily was known, it is 14580 liters; the same way, a composed sampling was performed in order to determine the physical, chemical and microbiological features of the waste water. Based on this characterization, it was known that the waste water shows high figures in parameters such us: Oxygen Biochemical Demand (OBD), Oxygen chemical Demand (OCD), grease and oils. Furthermore , based on the characterization performed, the most adequate treatment system was chosen ,this is a grid system of manual cleaning made up on a rectangular channel, a homogenizer tank to distribute the constant flow to the following operations, a circular sedimenter in which aluminum polichlorine will be dosed at 25% in 5ml per liter of waste water ,an airing tank and slow filter made of sand and gravel with 1,20 m and 0,45 m respectively; with this it will be possible to remove 98,5 % of blur, 97 % for OCD , 97 % for OBD and 99 % of oils and grease. In conclusion, with the treatment system designed, the parameters stated for the flush to the public sewage system will be achieved. It is recommended to the Dairy Company San José, to implement the waste-water treatment system in order to fulfill the parameters stated in the Unified Text of Legislation from the Ministry of Environment, file VI, annex I, resource water, flushing for public sewage.