More than 20 000 t of carbonizate of excess active sludge is formed due to the introduction of the system for the thermal neutralization of excess active sludge at enterprises of the petrochemical complex. The possibility of using the carbonizate, the production waste of excess active sludge of biological treatment facilities of the petrochemical complex, as the carrier to immobilize the microorganisms with the purpose of acquisition of biosorbents applied in nature conservation technologies, is presented. Carbonizate corresponds to demands that are made to the carrier for the immobilization of microorganisms by its mechanical and physicochemical properties. The process flowsheet for the biosorbent production based on carbonizate and hydrocarbon-oxidizing microorganisms is presented. The possibility of using the carbonizate-based biosorbent in the bioremediation technology of the work-in-progress (WIP) is proven and an increase in the purification efficiency of the WIP by a factor of 1.7 compared with traditional bioremediation methods is established. The process flowsheet of purification of the oily soil using the biosorbent based on the carbonizate of excess active sludge is presented.