ABSTRACT This study investigated the biosorption of the anionic textile dyes: Reactive Red 239 (RR239). Reactive Black B (RBB) and Direct Blue 85 (DB85) according to pH. biomass dosage. contact time and dye concentration onto waste beer yeast slurry. https://smokeysmountainfurnitureoutlets.shop/product-category/cocktail-table-lift/