Diseño de un sistema de tratamiento de aguas residuales de la quesera Doña Isabelita “cantón Guano

Abstract

The objective of the present project was to design a wastewater treatment system of the Señora Isabelita "Cantón Guano" cheese, for this the flow rate was measured using the volumetric method. For physical-chemical characterization, 3 composite samples will be taken through composite sampling. The jar test was performed using different variations of Aluminum Polychloride as an anionic coagulant and flocculant to reduce suspended solids present in the wastewater. The design flow rate 3.25x10-4 m³ / s was determined. The physical-chemical analysis of the wastewater with serum that the company discharges indicates values of BOD5 2500 m / l, DQO 3440 mg / l, oils and fats 237.5 mg / l, suspended solids 365 mg / l and total solids 4256 mg / l, then it was lost that the serum was not spilled and the results were: BOD5 1245 mg / l, DQO 1660 mg / l, oils and fats 237.5 mg / l and highly total 3132 mg / l, which are outside of the discharge limits to the public sewer system established in Table 8 of Ministerial Agreement 097-A Annex to the TULSMA. An optimum concentration of 20 ppm of PAC and anionic flocculant at 4 ppm (high negative charge polymer) was considered, where a yield was obtained in relation to the removal of contaminants from the serum-free wastewater shows a decrease of 79.19%. Then, the wastewater treatment system consisting of a channel, grilles, primary settler, aeration system, secondary settler, flocculator and filtration was sized. The company is recommended to implement a wastewater treatment system in order to reduce the pollutant load by improving water quality and comply with discharge limits to the public sewer system stipulated in current environmental regulations.