Four strains with rapeseed oil degrading power were isolated from contaminated soil and screened.Experimental results indicated that these four strains had different degrading activities and Pseudomonas sp.Z1 showed higher rapeseed oil degrading activity.Optimum condition of growth of Z1:30 ℃

pH 7.0

inoculum amount 1%

and shaker rotary speed 210 r8226;min-1.Biodegradation of oily smoke was investigated at superficial velocity of biofilter reactor 0.3—1.2 cm8226;s-1

retention time 10—40s and the effects of such factors as smoke concentration

flow rate and humidity on oily smoke removal were studied.The biofilter reactor was effective in removing oily smoke and was able to handle a high smoke load.