This research was investigated the applicability of the biofiltration technology for the removal of volatile organic carbons (VOCs) produced from the bioremediation of oil contaminated soil. Diesel was used as surrogate for oil and, two types of biofilter systems made of ceramic and polymer media were compared for the removal efficiencies of diesel VOCs at different inlet concentrations and space velocity (SV) conditions. During the first 30-d operation, the removal efficiencies of the biofilter packed with polymer and the biofilter packed with ceramic were investigated at constant SV of

When inlet concentrations of diesel VOCs were below 10 ppmv, the average removal efficiencies of the polymer biofilter and the ceramic biofilter were average

, respectively. When the inlet concentration increased to 30 ppmv, the VOC removal efficiency in the polymer biofilter was

, while the average removal efficiency in the ceramic biofilter was

. Effect of the inlet concentration and SV on the removal efficiency of total diesel VOCs was investigated. As SV increased from

to

and

, the removal efficiency of total diesel VOCs was decreased gradually. The average removal efficiency of the biofilter packed with polymer carrier was decreased from

. The biofilter packed with polymer carrier showed that the removal efficiency of benzene and toluene were maintained within the range of

. In contrast, for the biofilter packed with ceramic carrier, when SV increased from

to

and

, the removal efficiency of benzene decreased from

. respectively. The removal efficiency of toluene decreased from

at SV of

, and

, respectively.