生物过滤床处理甲苯和乙酸乙酯混合废气

Two biofilters,RA which had been exposed to varying concentration of ethyl acet ate for 20 days and RB which had been exposed to varying concentration of toluen e for 20 days, were used to remove mixed gas of ethyl acetate and toluene. The t wo biofilters used a mixture of compost and lava, with the initial medium moistu re content of 50%. The experimental results demonstrated several characteristics of the two biofilters:The maximum elimination capacities were about 400?g·m -3 ·h -1 for ethyl acetate and 50 g·m -3 ·h -1 for toluene;U nder the condition that the empty bed residence time was 1.0 minute, for e thyl a cetate concentration in the inlet air ranging from 2000 mg·m -3 to 4500?m g·m -3 and toluene concentration ranging from 200?mg·m -3 to 400?m g·m -3 ,the removal efficiency for binary VOCs of both biofilter RA was ab ove 90%;Biofilter RA was better than biofilter RB in elimination capacity, stabi lity and adaptability.