[Biotreatment of chrolobenzene-contained waste gas in trickling biofilters enhanced by SDS].

Biofitlers inoculated P. putida strain and packed respectively with ACOF and ceramic pellets were employed to purify the chlorobenzene contained gases. An anionic surfactant, sodium dodecyl sulfonate (SDS) was introduced to trickling liquid to investigate its effect on the performance of biofilters. The result of microorganism cultivation shows that the inhibition to P. putida will be occurred when the SDS concentration in culture medium exceeded 35 mg/L. Addition of SDS in trickling liquid at concentration of 25 mg/L reduce the acclimatization periods and improve the performance of biofilter at stable condition. For the ACOF biofilter, the optimum SDS addition concentration is 25 mg/L, and the maximum elimination capacity of 234.7 g/(m3 x h) could be achieved. 18% - 20% of SDS in trickling liquid was lost after five days operation, but the lose could not reduce the efficiency of biofilter evidently.