The Brazilian Society of Agricultural and Agroindustrial Waste Management (Sbera) has the pleasure to invite you to the IV International Symposium on Agricultural and Agroindustrial Waste Management (IV SIGERA) to be held in the city of Rio de Janeiro-Brazil, May 5-7, 2015. The IV SIGERA will connect the reality of production with the environmental sustainability of Brazilian and world agriculture. During the symposium, the most relevant scientific topics involving wastes from agricultural, livestock and agroindustrial operations will be presented and discussed.