Then, ways had been tried alternative to reuse or to incorporate some types of residues in recent decades, also incorporation in construction materials. Between them, it is had incorporation in the substance cousin of the ceramic industry for confection of bricks. In the study carried through for Liew et.

al. (2004), which involved the reutilizao of the silt of sewer in ceramic bricks, was evidenced that the silt can be incorporated successfully in bricks with additions of dry silt varying of 10 40%. With relation to the results of absorption of water, compressive strength and metal leaching weighed, could be concluded that the incorporation of silt up to 40% in bricks guarantees different intentions for its application, in all the cases, the bricks could be used for masonry of prohibition without structural function. The incorporation of the silt of ETE in the substance cousin of the red ceramics industry, contributes with the development of technologies for the productive and sanitarily safe from final destination the silts generated in the sector of the sanitation and to minimize the possible impacts related with the use of the ground as raw material source of ceramics. The use of silts originating ETE as substance ceramic cousin it can be a viable alternative, in such a way economic as technique, reducing related ambient costs with the final disposal of these materials.

Moreover, the inherent operations to the ceramic industry (ovens with high temperatures) make with that the risks sanitary if reduce to the minimum. The ceramic industries of the state of the Rio Grande of the North? RN, saved some exceptions, uses traditional processes of burning of the products, having the firewood as main source of heat. In this aspect, the ceramic activity can be considered potentially polluting as, for the possibility to emit for the atmosphere: smoke, particulado material, carbon monoxide and three other contaminantes cited in the Resolution n 03/90 of the CONAMA. On the other hand, it is known that the burning of the clay also is a source of atmospheric pollution, mainly for the emission of fluorids. Therefore, the incorporation of the silt as substance cousin of the industry to cer.