Sewage sludge is one of the main products generated from municipal wastewater treatment plants. An environmentally safe disposal of sewage sludge is an ongoing problem in many countries of the world. Therefore, practical disposal options of sewage sludge and sewage sludge ash involve some reuse as raw material in the fired clay brick making process. The biological, physical, chemical and mineralogical characterization of the dried sewage sludge, sewage sludge ash and clay materials were carried out, in order to identify the major technological constraints. The international toxicity...