This dissertation evaluates the performance of the biopolymer M22 in treating the liquid effluent from a leaf fertilizer industry. The study aimed to assess the effectiveness of the biopolymer in removing nutrients from the effluent, with varying dosages ranging from 1 to 15 mL. The effluent was analyzed for various nutrients, including boron, cobalt, copper, sulfur, iron, phosphorus, magnesium, manganese, molybdenum, nickel, potassium, and zinc. The results showed that the biopolymer was effective in removing these nutrients, with the highest removal rates for iron, magnesium, and manganese, reaching 99.91%, 100%, and 99.58%, respectively. The study also analyzed the pH of the effluent and the quality index of water (IQA) to assess the impact of the biopolymer on the effluent's characteristics. The results indicated that the biopolymer significantly reduced the concentration of nutrients in the effluent, although some parameters still exceeded the limits set by CONAMA Resolution No. 430. The study concluded that the biopolymer M22 is effective in treating the effluent, but further treatment methods such as biodigestors and stabilization ponds may be necessary to meet the required standards for discharge into water bodies. The findings suggest that the biopolymer has potential as a treatment agent for industrial effluents, particularly in the context of leaf fertilizer production.This dissertation evaluates the performance of the biopolymer M22 in treating the liquid effluent from a leaf fertilizer industry. The study aimed to assess the effectiveness of the biopolymer in removing nutrients from the effluent, with varying dosages ranging from 1 to 15 mL. The effluent was analyzed for various nutrients, including boron, cobalt, copper, sulfur, iron, phosphorus, magnesium, manganese, molybdenum, nickel, potassium, and zinc. The results showed that the biopolymer was effective in removing these nutrients, with the highest removal rates for iron, magnesium, and manganese, reaching 99.91%, 100%, and 99.58%, respectively. The study also analyzed the pH of the effluent and the quality index of water (IQA) to assess the impact of the biopolymer on the effluent's characteristics. The results indicated that the biopolymer significantly reduced the concentration of nutrients in the effluent, although some parameters still exceeded the limits set by CONAMA Resolution No. 430. The study concluded that the biopolymer M22 is effective in treating the effluent, but further treatment methods such as biodigestors and stabilization ponds may be necessary to meet the required standards for discharge into water bodies. The findings suggest that the biopolymer has potential as a treatment agent for industrial effluents, particularly in the context of leaf fertilizer production.