Implementación de un post tratamiento por laguna de maduración de bajo calado para el efluente de un digestor anaerobio doméstico rural

Abstract

The objective of the project was wastewater treatment implementation with a low draft maturation lagoon for the effluent of a rural domestic anaerobic digester that treats black water. The fecal coliforms concentration as indicator of pathogen contamination and the concentration of The Chemical Oxygen Demand (COD) were used within monitoring strategy. The maturation lagoon was designed based on the superficial organic load of 0.12 kgDBO5 / m2 with a surface area of 5 m2. Parameters were determinate at 0.07 m and 0.15 m draft with retention times of 3 and 7 days, respectively. The results of pathogens elimination efficiency were 99.99% for the two retention times, while for the COD removals of 34.5% were obtained for retention time of 3 days and 48.4% for retention time of 7 days. The lagoon is an efficient treatment in the elimination of pathogens with 99.9%, low cost, with insignificant negative impacts to the environment.