Abstract: In recent years, the production of sludge from wastewater has greatly increased worldwide due to demand for better water quality and the imposition of stricter environmental laws. One of the main problems of pollution of the sewage sludge is the concentration and availability of heavy metals which may contain, because these sludges represent a risk to the environment and to human health. Hence the importance of finding alternatives to generate stable and non-hazardous waste for proper disposal or reuse in order to contribute to sustainable development.