The production, mechanical and thermal characterization of sustainable composite 3D printing filaments, made of recycled polypropylene (rPP), polylactic acid (PLA) and agro-industrial waste like rice husk (RH) and cocoa husk (CH)as reinforcements are presented. Manufacture of the composite filaments was carried out by using a twin extruder, the aim is to obtain a 1,7cm diameter filaments. Composite 3D printed specimens at different concentrations of the fiber, different fiber type, and matrix, and different printing directions were thermal and mechanical characterized by thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC), tensile and flexural tests. The Taguchi method is an analysis tool used to design the experiment with different factors to evaluate the effects and optimal values. TGA analysis showed that the degradation process of the composite started earlier than the neat rPP. The mechanical test showed that the printed direction and composition are significant in strength properties. Tensile strenght and elastic modulus decrease with 0° printing direction and 5% of RH.