Tratamiento a nivel laboratorio de las aguas residuales de una industria de pollo ubicada en la ciudad de Bogotá

Abstract

An alternative was evaluated for the treatment of wastewater from a chicken meat production company, located in the city of Bogotá, with emphasis on the reduction of COD; for the development of this alternative in the industrial implementation, the retention times are equal to or greater than 24 hours. So a method was carried out in which, these retention times were less than one (1) day, allowing the daily treatment of wastewater from this company. It was started by evaluating the physicochemical parameters of the raw wastewater based on the standardized methods for analysis of drinking water and residual water; followed by this, the pH corresponding to the isoelectric point was found to obtain the highest precipitation of organic matter. In the later stage, tests were carried out on jars with three (3) coagulants: aluminum polychloride, aluminum sulfate and ferric chloride, thus defining the coagulant and optimum dose, for the reduction of turbidity and COD. Choosing the best coagulant, a biological secondary treatment was carried out with activated sludge for three (3) concentrations of inoculum, the inoculum was obtained from the company Byodine already developed. Finally, the physicochemical parameters of the treated wastewater were evaluated again, based on the standardized methods for water analysis and compared with the maximum permissible levels according to resolution 631 of 2015. After developing the previous stages it was identified that, although the COD of the wastewater of this company went from 32,500 mg / L of O2 to 652 mg / L of O2; continues to violate the norm; Therefore, it was necessary to perform new assays with the best dosage of inoculum (0.15%), increasing the treatment time with activated sludge at 5 hours, both with previous treatment and without prior treatment this time with ferric chloride. Obtaining concentrations of COD less than 500 mg / L of O2, and thus complying with the maximum permissible established in the norm for the parameters of interest.