Diagnóstico de la operación y mantenimiento y evaluación de impactos ambientales de las lagunas de oxidación de la ciudad Palestina, Provincia del Guayas.

Abstract

The city of Palestina has a sewage treatment plant composed of a facultative lagoon and a maturation lagoon, it does not have pretreatment. The research consisted of measuring the current lagoons and quantifying inflow flows and measuring the depths of the lagoons, with these data the designs of the lagoons were carried out. The flow that enters the facultative lagoon is 577.3 m3 / day, while the projected design flow is 6912.71 m3 / day, higher than the flow that is entering the treatment system, giving an indication that in some section the system may be diverting or infiltrating raw wastewater. With this, it was determined that the current lagoons do not have capacity for the current population, less for the future. The two lagoons are undersized. Despite this, according to the laboratory reports, the PTAR discharges treated water that complies with environmental regulations, but as we had indicated, the flow that enters the lagoon does not correspond to that generated by the population connected to the system. The main environmental impacts generated by the operation of the sewage system and PTAR are due to the very probable infiltrations of sewage into the soil, affecting the quality of the soil and groundwater. For this reason, a complete review of the sewerage system and pumping station is necessary to verify the entry of the flow, in addition to monitoring the plant to guarantee the quality of the effluent and the expansion of the treatment system to complete the required areas.