Using the effluent treatment station sludge in the manufacture of red ceramics at the Iranduba/AM ceramic pole

Abstract

In the search for solutions capable of minimizing the environmental impacts from wastewater treatment plants of the industrial activities related to the final destination of waste generated (SLUDGE), the present work has the purpose of presenting the results of the incorporation of sludge from a treatment plant industrial and domestic effluents in the clay for the manufacture of red ceramics. The treatment plant sludge and the clay underwent chemical and mineralogical characterization through granulometric distribution, X-ray fluorescence analysis and X-ray diffraction. The samples were homogenized in the proportions of 0%, 5%, 7% and 10% by weight of the sludge in the clay, pressed at 25 MPa, and the characterization was carried out again by X-ray diffraction, proof and then burned at 900ºC. The physical and mechanical properties analyzed were: fire loss, linear retraction, water absorption, apparent specific mass, apparent porosity, Rupture to Bending stress and humidity. The results presented show similarity to the one recommended by ABNT and the base (0% of sludge). Although the samples of 10% by weight of the sludge in relation to the clay show a variation in the chemical composition due to their high organic matter content, it was possible to observe that both had as main compound SiO2, Al2O3 and Fe2O3. The physical and mechanical analysis corresponded to with a maximum percentage of 10% by weight of the sludge, reaching the objectives of the work, making feasible the aggregation of the waste generated by the industrial and domestic effluent treatment plant.