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. is classified in the families of Bacillaceae, which is a gram positive bacterium that only grows under aerobic conditions; it grows best at pH 7 and pH 9 and cannot grow at pH 3, 5, or 11.