“…Comparatively, biological treatment has been validated as a promising technology for odoriferous VOCs removal from gas due to its relatively low investment and operating costs, small energy requirements as well as efficient conversion of biodegradable contaminants to harmless end-products [7][8][9]. A number of VOCs were found to be biologically degraded using different bioreactors, for example synthetic H 2 S and VOCs mixture (butanone, toluene and ␣-pinene) by a biofilter and an air diffusion bioreactor [10], trichloroethylene and toluene mixture by a hollow fiber membrane reactor [11], single, binary and ternary mixture gas of ethanethiol, dimethyl disulfide and thioanisole by a biotrickling filter (BTF) [12,13]. Few substances are still unable to be biologically degraded, although this technology is relatively cheap and reliable process.…”