Aprovechamiento de lodos deshidratados generados en plantas de tratamiento de agua potable y residual como agregado para materiales de construcción

Abstract

In the present study are analyzed the sludge coming from the Stabilization Ponds located in Ucubamba, which are an integral part of the treatment system for domestic wastewater of the city of Cuenca, and sludge coming from water treatment operations of the treatment plant of Sústag. These analyzes are intended to determine the usefulness of sludge as aggregates for construction materials, creating an ecological arrangement of thereof, and helping to minimize the extractive activities of raw materials used in the construction industry. Studies showed that sludge from the water treatment has not this applicability due to the high content of sulfates, which exert a marked corrosive effect on materials: mortars and concretes. On the other hand, sludge coming from the wastewater treatment system proved to be effective for the manufacture of the following materials: mortars, in which the sludge ash exerts the same effect as lime; concrete, when the sludge replaces 10% of fine aggregate; and bricks where the highest efficiency is obtained when the added dose replaces 5% of its volume.