RESUMO
RESUMEN La Planta de Tratamiento de Agua Potable- PTAP Tibitoc se abastece en gran medida por el Río Bogotá, a través de dos bocatomas ubicadas en el sector El Espino. Allí es evidente el desarrollo incontrolado de la macrófita Buchón de agua (Eichhornia crassipes) atribuido al constante aporte de carga de nutrientes y materia orgánica aguas arriba de la cuenca, lo cual genera problemas en la dinámica ecosistémica del cuerpo de agua, así como en la calidad del recurso que abastece a la planta. El propósito de este estudio, mediante una metodología experimental verdadera, es evaluar la capacidad de absorción de materia orgánica de la especie, representada por la cantidad de materia orgánica removida por unidad de biomasa, estimando un valor máximo de remoción equivalente a 19,53 mg O2 L-1/g por unidad de Buchón, y con ayuda del modelo logístico de crecimiento, se valida el periodo en el cual se puede mantener la especie en el cuerpo de agua, sin que esta afecte el sistema, concluyendo que su eficiencia empieza a decaer entre los 165 a 195 días después de sembrar los especímenes en cauce de la zona de estudio, luego de los cuales se sugiere su remoción.
ABSTRACT The Potable Water Treatment Plant - PWTP Tibitoc is largely supplied by the Bogotá River, through two intakes located in the sector El Espino. Is evident the uncontrolled development of the macrophyte Eichhornia crassipes attributed to the constant contribution of nutrients and organic matter load upstream of the basin, which generates problems in the ecosystem dynamics of the body of water, as well as in the quality of the resource that supplies to the plant. The purpose of this study, through a true experimental methodology, is to evaluate the absorption capacity of organic matter of the species, represented by the amount of organic matter removed per unit of biomass estimating a removal value of 19.53 mg O2 L-1/g for unit ofWater Hyacinth. With the help of the logistic growth model, the period in which the species can be maintained in the reservoir is validated without affecting the system, concluding that its efficiency decay between 165 to 195 days after sowing the specimens in the course of the study area, after which removal is suggested.
RESUMO
Microbial fuel cells represent an innovative technology which allow simultaneous waste treatment, electricity production, and environmental monitoring. This study provides a preliminary investigation of the use of terrestrial Single chamber Microbial Fuel Cells (SMFCs) as biosensors. Three cells were created using Andean soil, each one for monitoring a BOD concentration of synthetic washed rice wastewater (SRWW) of 10, 100, and 200 mg/L for SMFC1, SMFC2 and SMFC3, respectively. The results showed transient, exponential, and steady stages in the SMFCs. The maximum open circuit voltage (OCV) peaks were reached during the elapsed time of the transient stages, according to the tested BOD concentrations. A good linearity between OCV and time was observed in the increasing stage. The average OCV in this stage increased independently of the tested concentrations. SMFC1 required less time than SMFC2 to reach the steady stage, suggesting the BOD concentration is an influencing factor in SMFCs, and SMFC3 did not reach it. The OCV ratios were between 40.6-58.8 mV and 18.2-32.9 mV for SMFC1 and SMFC2. The reproducibility of the SMFCs was observed in four and three cycles for SMFC1 and SMFC2, respectively. The presented SMFCs had a good response and reproducibility as biosensor devices, and could be an alternative for environmental monitoring.