Decolorization of textile effluent with mushroom Agaricus bispora

Decolorization of textile effluent with mushroom Agaricus bispora. The direct application of Agaricus bispora mushroom was evaluated for decolorization of a synthetic mixture of reactive dyes. The effects of particle size (0.5 or 1.0 cm cubes and triturated mushroom), mushroom mass (10, 20, 40, 60 or 80 g in 250 mL of solution) and different mushroom tissue treatments were analyzed regarding color removal efficiency of dyes Reactive Yellow 37, Reactive Black 5 and Reactive Red in a synthetic solution of 13.3 mg L-1 concentration of each dye. The best results were found with larger superficial contact area between mushroom particle (triturated mushroom) and colored effluent under continuous aeration. Acetone addition during mushroom trituration process followed by a freezing step contributed to decolorization improvement, leading to best results: 73% after 6h, with 20 g of biocatalyst 250 mL(-1) of effluent. The use of different mushroom batches and brands resulted in different enzymatic activities and similar levels of color removal, such result confirmed that decolorization does not have any direct relation with enzyme activity.