Researches based on the use of sludge from wastewater treatment plant Saint-George

To sustain healthy life in harmony with nature, it is extremely important to develop materials and processes that minimize a harmful influence on the environment. The feasibility of sludge recycling in the ceramic manufacture was evaluated through laboratory testing. Such residues have similar chemical and mineralogical composition with the raw mixture of the green ceramic body used in construction. Several ceramic masses with clay, sand and various proportion of sludge have been synthesized and then characterized by their physical-mechanical properties. The fineness of the clay, the main component of the green ceramic body, has been considered for every raw mixture. The proportion of the sludge waste addition depends of the clay fineness and the sintering capacity also, increases with the clay fineness. Ceramic properties, especially porosity, water adsorption and mechanical properties in the presence of small amounts of sludge have insignificant changes. The introduction of such waste into building ceramic matrix (bricks, tiles and plates) has a very good perspective.