Diseño de la planta de tratamiento de aguas residuales de la parroquia Santa Fe de Gálan del cantón Guano.

Abstract

The objective of this research was the design of the sewage treatment plant for the Santa Fe de Galán Parish, Guano Canton, since this water is discharged directly to the stream (SN) and to the cultivable land that is around the population, being a problem that must be addressed because of the pollution that it causes, by means of the physical - chemical and micro - logical characterization of the residual water where it was determined: sulfur, total nitrogen, Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), fecal coliforms, total coliforms, total suspended solids, oils and fats and surfactants are parameters that are outside the norm's permissible limits; in such a way that, the biodegradability index was taken as reference which is the result of the characterization of DBQ and the COD resulting in a value of 1.71, this indicates that the organic matter is moderately biodegradable allowing the selection of a treatment physical - chemical, it was started with treatability tests through jug test determining the chemical reagents that will be used to treat the water, in this case aluminum sulfate and aluminum polychloride (APC) were optimal. So that, the concentration of aluminum sulfate is of 30.2 kg / day, and the concentration of Aluminum Polychloride (APC) is 50.4 kg / day. Validation of physical - chemical and microbiological parameters of the treated water results in: sulfur 0.3 mg /1, total nitrogen 40 mg /1, BOD 38 mg /1, COD 90 mg /1, absence fecal coliforms, total suspended solids 86 mg /1, oils and fats 24 mg /1, and surfactants 0.46 mg /1, the system is established as follows: gratings, rectangular input channel, sedimentation tank, coagulation tank, floculator tank, secondary sedimentation tank, agitation blades type turbine of 6 blades and times of drying.