Recently, the interest in air pollution caused by gaseous pollutants has been increased. Especially volatile organic compounds are volatilized in the atmosphere raises the odor and ozone, a known carcinogen and causing nervous system disorders through inhalation.
Treatment technologies of volatile organic compounds are incineration, adsorption and biological method. Among them, biological treatment method is converted volatile organic compounds into water and carbon dioxide by microorganisms. That is low cost processing and eco-friendly method but is difficult to apply actual industry site because of its limitations.
In this study, toluene gas removal efficiency and stability characteristics were evaluated using bio-filter composed of ceramic media and beneficial microorganisms in order to overcome the limitations existing biological treatment method.
Reactor of bio-filter has 1.5L effective volume and operated 90 seconds empty bed retention time. The removal efficiency were evaluated through analysis of the inlet and outlet concentrations using GC-MSD.
Optimal conditions were temperature 21℃, humidity 80%, and toluene removal efficiency was 86.32%. and 100ml supply of nutrient showed the removal efficiency is 8.01% higher than the supply did not. Average removal efficiency of toluene is 94.48%, and the highest removal efficiency is 98.98%. Internal pressure loss is 0 ~ 10mmAq clogging of the pipe due to the influence of moisture. Except during that periods, the pressure loss was not observed. And adapting to changes in the initial temperature was 6 hours, 1 hours adaptation was observed for the second temperature changes. The result of 20 times the shock load experiment of influent concentration removal efficiency has fallen 40.96% sharply. after 3 hours of recovery efficiencies were greater than 80% after 6 hours was maintained at 87-89%, after 32hours removal efficiency reached 95.76%