Avaliação da incorporação de lodo de Estação de Tratamento de Esgoto como matéria-prima na produção de materiais cerâmicos.

Abstract

In this work, the insertion of a dry solid waste from sewage treatment, called sludge, in a ceramic. The dried sludge in crude form was collected at Estação Parque Marinha, located in the municipality of Rio Grande - RS and mass based ceramic clays was obtained in Olaria Guido Einhardt, located in the municipality of Pelotas - RS. For development work, initially, was characterized chemically the sludge and the mass based ceramic clays. Then, were prepared formulations with 0, 5, 10, 20 and 40% by weight of sludge added to the ceramic mass, they are burned at temperatures of 850, 900, 950, 1000, 1050°C. In bodies of the test obtained were determined properties of linear shrinkage, apparent porosity, water absorption, flexural strength to four points, environmental viability according to ABNT NBR 10.004/2004 and technological application of the product. As a result, the formulations sludge added, up to 10%, attained satisfactorily standard requirements for use as ceramic blocks and masonry for almost all firing temperatures, except at the firing temperature of 850°C for the formulation of 10%. For all other formulations, minimum requirements of the standard were met with some restrictions. As environmental feasibilities, made only in the formulations mass that had the best mechanical strength, able to have a technological application, were classified as Class IIB - Inert, by the ABNT NBR10004/2004.