Facultad de Ingeniería Tesis Maestrías

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    Evaluación del desempeño de un sistema piloto de humedales de flujo subsuperficial horizontal para el tratamiento de aguas residuales domésticas en ecosistemas de montaña
    (2018) Padrón Palacios, Juana Priscila; Pauta Calle, Gladys Guillermina
    In the assessment of a wastewater treatment system, a very important factor is the efficiency that it can achieve in the decrease of nutrients. Constructed wetlands with horizontal subsurface flow are a sustainable alternative for such treatment in small communities. However, no references are reported for the use of these systems in conditions of height above 2400 m a.s.l. In the present study, the efficiency of three wetlands built on a pilot scale in the treatment of domestic wastewater was evaluated, using different hydraulic retention times (HRT) and different emergent plants. The three reactors worked with hydraulic loading rates of 2,2 to 4 cm / d, temperatures between 13 to 15 ° C and at a height of 2416 m a.s.l. The results showed that the performance of the pilots reached average values between 50 and 90%, 75 and 98%, 40 and 58%, in the removal of Total Kjeldahl Nitrogen (TKN), Organic Nitrogen (OGN), and Total Phosphorus (TP) respectively. However, for total coliforms (TC) and Escherichia coli (E.coli), the removal was between 99,991 and 99,999%; and 99.96 and 99.99% respectively, for HRT between five and nine days. It has demonstrated the feasibility of the use of these systems for the height and temperature conditions of the city of Cuenca. The use of plug-flow models and tanks-in-series for the study of the removal of the analyzed pollutants showed that the tanks-in-series represented better the operation of the reactors. In the case of the removal of pathogens, it was observed that the plug-flow model represented better the decay of these pollutants.