The widespread consumption of jamu, a traditional herbal medicine, contributes to the accumulation of rhizome pomace (RP), a by-product generated during the water extraction of local rhizomes, such as black turmeric (Curcuma aeruginosa), white turmeric (Curcuma zedoaria), and aromatic ginger (Kaempferia galanga L.) used in jamu production. This study addresses the environmental challenge posed …