The rapid growth of industry in Indonesia is partly driven by the emergence of new sectors such as the pharmaceutical industry. This sector has experienced a surge in the production of various types of medical capsules,with shells made from gelatin, colorants, and other components. As capsule production increases, so does the amount of gelatin waste was generated. In this study, beads weremanufactured using an extrusion technique with 0.1 M CaCl2to induce cross-linking. Theratioof alginate togelatin waste wasvaried to determine the stability of the beads. The stability of the beadswasobserved oversevendays,and the optimalcompositionwas found to be1:1. From the results of the TGA/DTA characterization, thermal analysis revealed that the combination of gelatin waste and sodium alginate improvedits material properties. SEM results show that the Ca-Alginate-Gelatin waste beadscontainedalginate network, resulting ina porous structure and amorphous shape.Based on these finding, the beads produced have the potential toserve as adsorbentsforuse in slowedrelease fertilizers.