A comparative study of two processes for indoor vocs treatment: biofiltration vs. hybrid system (biological process+adsorption)

Conference Dates

June 19-24, 2016


Biofiltration technology and the hybrid system combining biofiltration and adsorption (onto activated carbon) were compared as possible methods to treat indoor air pollution. Toluene and p-xylene at ppb concentration levels (2-45 and 1-33 ppb, respectively) were chosen as characteristic indoor pollutants for this study. An organic material was used as packing material for the biofiltration stage and its acclimation was carried out for 100 days at higher concentrations. Even at low empty bed residence time (EBRTs) and concentrations, toluene removal efficiency reached 100% and p-xylene showed an increasing trend in their removal efficiency over the time. The assessment of by-products and particles generation by the biofilter and the hybrid systems was taken into account. Acetone and acetic acid were identified as by-products of the biofilter. Particle emissions in the range of 0.03 to 10 µm were recorded for both systems which suggest the necessity of using a particle filter at the end of the process chain.

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