A NOVEL METHOD TO SUPPLY THE INHIBITORY AROMATIC COMPOUNDS IN AEROBIC BIODEGRADATION PROCESS

Abstract

To efficiently supply inhibitory aromatic solvents such as benzene, toluene, and xylenes in liquid phase for aerobic biodegradation processes, a novel technique was developed. Silicon tubing was immersed in the bioreactor and liquid solvent was circulated within the tubing from a solvent reservoir. Transfer rate of the solvent through a silicon tubing was significantly affected by impeller speed, whereas other operating parameters such as aeration rate and circulation rate of liquid solvent within the tubing showed a negligible effect. Aerobic biodegradation of toluene and p-xylene was carried out using this method and the biodegradation rate of solvent mixture was high compared to those of conventional methods.