DETERMINACION DE PARAMETROS DE DISEÑO, PUESTA EN MARCHA Y EVALUACION DE LA EFICIENCIA DE HUMEDALES DE FLUJO SUBSUPERFICIAL EN LA PLANTA PILOTO AURORA II, PARA EL TRATAMIENTO DE AGUAS RESIDUALES DOMESTICAS

Abstract

The investigation on the flow of sub superficial humidity, consists on designing, building and evaluating a system which determines the parameters of design, dimensions, time of hydraulic retention, optimum superficial area, as well as the elaboration of constructive plans. After that the building phase began in the trial plant “Ing. Arturo Pazos Sosa” the building phase took us from February to May 2011, using as vegetation, tulle brought from lake el Pino, We found out that it took a period of 30 days for it to grow and adapt in that environment. two months after having planted the tulle The evaluation was made, we reached removals of up to 63% for DBO5, 65% for DQO, 61% for suspended solids, 31% for Nitrogen, and 30% for phosphorus. with a relation in DBO5/DQO of a 0.63 % which indicates it to be very biodegradable, it also indicated values of ph above 7.5. In the following months we continued with the evaluation in order to study its behavior in regards to time. and though the results show high efficiency in the removals of DBO5, DQO, suspended solids, as well as total nitrogen, it does not show the same results for the removal of phosphorus. In conclusion, after 15 months of the working of the wet land, it is considered that the area equivalent per habitant is of 1.5 m2 , (1 habitant =150 lts/hab/day). In order to reach the same quality of water using stabilizing lakes 2.5 m2 area required at minimum per habitant therefore requiring a lesser size area per person.