Abstract The objective of this work was to evaluate the use bentonite as an additive in composting wastewater sludge from poultry agroindustry regarding nitrogen conservation, carbon degradation, and nutrient content increase. experimental design completely randomized with five treatments at 0, 0.5, 1.0, 3.0, 6.0%, three replicates. organic compost used consisted pine sawdust treatment plant. D...