This technology utilizes engineered nanocomposites created from woody lignocellulosic biomass, specifically pyrolyzed yellow pine biochar modified with silver nanoparticles, to remove synthetic dyes and heavy metals from wastewater. Combining filtration efficiency, antibacterial activity, and adsorption capacity, the system targets pollutants such as Methyl Violet dye, lead, and cadmium, offering a cost-effective, eco-friendly, and scalable solution for reducing freshwater demand in industrial water treatment.