Diseño de un sistema de tratamiento biológico para las aguas residuales recolectadas por el hidrosuccionador de la EP - EMAPAG del cantón Guaranda.

Abstract

The objetive of this research is design a biological treatment system for the effluents collected by the Sewer Vacuum Truck and reduces environmental impacts by discharging liquid waste from the different places in Guaranda city. The identification of the research place was made, then the sample was taken for analyzes. Preliminary analyzes were developed in Seidlaboratory Cía. Ltda Quito, the physical, chemical and bacteriological tests executed are detailed below: Oils and fats 149 mg/L, Biochemical Oxygen Demand (DBO5 ) 1028,55 mg/L, Chemical Oxygen Demand (COD)1317,4 mg/L, Oxygen Dissolved 0,7%, Total Nitrogen 0,00%, Fecal Coliforms 99x10E1 NMP/100 mL. The values are outside the possible limits of the TLSMA standard TABLE 3 (referring to admissible quality criteria for waters destined for agricultural use). The results in the primary characterization, defined the biodegradability index and the simulation of the processes, the following operations were established: grids, primary settler, biological reactor, secondary settler and drying stage, with the process simulation (pilot plant) the following results were obtained: Oils and fats, < 20 mg/L, Biochemical Oxygen Demand (BOD5) 7,8 mg/L, (COD) 10,43 mg/L, Dissolved Oxygen 52,7 %, Total Nitrogen 0,00, Fecal Colifoms < 1,8 NMP/100 mL, it can be evinced that the proposed system is the indicated for the purification of the effluents collected be the Sewer Vacuum Truck, for this reason it is recommended that the Company implement a Biological treatment plant to use water in irrigation.