Diseño de una planta de tratamiento de aguas residuales generadas en la planta procesadora de lácteos Lumilac, parroquia Licto-Riobamba.

Abstract

The objective of this study was to design a wastewater treatment system for the "Lumilac" Dairy Plant, which is located in the Province of Chimborazo in the Licto Parish, for which quality tests of physical-chemical parameters were carried out. within the discharge limits of the Official Registry of the Environmental Resource Regulation of the TULSMA Water Resource, Book VI Annex 1, Chart 8 "Discharge limits to the public sewer". The sizing was carried out by taking the flow on the days of greatest production of the plant, as well as the samples of residual water at the point of discharge to the sewer for its proper characterization, obtaining the parameters out of standard, with the following values; Chemical oxygen demand (COD) 2,760 mg / L, Biochemical oxygen demand (BOD) 1,520 mg / L, Total solids 2,712, Suspended solids 386.0 mg / L, oils and fats 238 mg / L, subsequently, treatability tests were carried out, determining that the most appropriate treatment was aeration for 16 hours. As a design variable, the quantity of water to be treated was determined, that is, the Flow. Obtaining as a result of the treatment the following percentages of removal: Oils and fats 73.63%; Dissolved solids 51.49%; Suspended solids 95.72%; Total Solids 71.98%; Biochemical Oxygen Demand (BOD) 84.87% and Chemical Oxygen Demand (COD) 86.96%, values that allow validation of the system. Concluding that the designed residual water treatment plant will have: Grid system, Homogenizer, Aeration and settler, a system that allows compliance with the aforementioned Regulations. It is recommended to periodically carry out the Physical-Chemical characterization of the waste water, as well as the flow to obtain a good operation of the purification system.