This book contains the bioremediation of a typical soil contaminated with used motor oil in a fixed bed bioreactor.It involves the sizing, construction and commissioning of a bench-scale experimental rig for bioremediation study. Varoius bioremediation apprpaches were investigated in the fixed bed bioreactor and a treatment technology for soil contaminated with used motor oil was establised.In addition, it contains the kinetic study, mathematical modeling and costing of the bioremediation system.