Evaluación uso de diferentes niveles de inyección de aire en un reactor de lodos activados con presión a escala piloto

Abstract

The present work evaluates the efficiency of a treatment system of an activated sludge system, operated under pressure at a lower air injection; located in the Santo Tomas University, Aguas Claras Campus, Villavicencio headquarters. The system was feed whit a, proposed synthetic wastewater in order to control its characteristics, at the entrance of the bioreactor. In order to determine the efficiency of the bioreactor, an effluent characterization was carried out through in situ monitoring of the following parameters: pH, dissolved oxygen, water temperature and flow; according to this, independent variables such as hydraulic retention time and air injection were also measured; later, BOD, COD and TSS, ex situ, were measured in order to determine the efficiency of final removal of organic matter in the bioreactor. The experimental design considered runs based on a factorial design 22 establishing four treatments; Treatment 1 15% air reduction and retention times 3h; Treatment 2 15% air reduction and retention times 6h; Treatment 3 30% air reduction and retention times 3h; Treatment 4 30% air reduction and retention times 6h; After this, the information was processed by the analysis of the ANOVA variance to determine the dependence and significance of the independent variables in a dependent. It was concluded that, the most effective treatment as far as removal was concerned was Treatment 1, due to the higher removal percentage 71% BOD, 69% COD and 77% TSS, therefore allowing an effective removal with low retention times and a 15% air reduction.