Utilization of turmeric residue for the preparation of ceramic foam

Turmeric residue, a solid waste discharged from the curcuminoids industry, is difficult to recover due to high concentrations of strong acids, organic solvents, and plant fibers. In this study, organic turmeric residue was used as the main raw material for the preparation of ceramic foam, in comparison with inorganic granite scraps. The bulk density, compressive strength, and thermal conductivity of ceramic foam were evaluated. And the microstructure, phase assemblage, and reaction at the high temperature were respectively characterized by computed tomography, X-ray diffraction, thermal analysis. The results revealed that the addition of turmeric residue was conducive to the formation of pore and the generation of amorphous glass phase, thereby improving the lightweight, mechanical performance, and thermal insulation. This study would provide a new perspective for the utilization of turmeric residue and the preparation of ceramic foam.