With 50 mg L-1 of sulfur black dye, the sulfur black removal efficiency reached 90% with 10 mg of dry cells of W3, and it reached 100% with 100 mg of dry cells of W3. The sulfur black removal efficiency of 10 mg of dry cells of W3 increased slightly to 99% when the concentration of sulfur black was increased from 10 to 200 mg L-1 and then decreased to 60% when the sulfur black concentration was increased to 1000 mg L-1.