Removal of Propane in Petrochemical Waste Gas by Composite of Activated Carbon and Microorganisms
In order to prepare the composites of activated carbon and microorganisms to treat propane in petrochemical waste gas,using propane as the sole carbon source,three propane microorganisms were isolated from petroleum contaminated soil,coupling the isolated strains with activated carbon,and then the composites were prepared and used in the bio-trickling filter to determine its propane removal capacity.The results showed that three strains of microorganisms selected could be coupled with activated carbon derived from columnar at optimal temperature 28℃and pH 7 with dry weight of microorganism content(0.18 mg·g-1).Under propane mass concentration of 800 mg·m-3 or below,ventilation speed of less than 10 L·min-1,and sprinkling rate of larger than 20 L·h-1,the composites exhibited good performances for the removal of propane with removal efficiency up to 82%.The composites were satisfactorily efficient in removing propane in exhaust gas modeling and moreover,and the automatic removal regeneration was realized by the removal of target pollutants by microorganisms.In this work,the composites effectively absorbed propane and realized self-desorption and regeneration,indicating an applicable prospect for disposing propane in petrochemical exhaust gases.
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