Treatment of N,N-dimethylacetamide waste gas by a trickle-bed air biofilter

The system performance of a trickle-bed air biofilter (TBAB) for treating N ,N-dimethylacetamide (DMAC) waste gas was investigated under different gas flow rates and influent concentrations. In the pseudo-steady-state conditio ns, the DMAC elimination capacity increased but the removal efficiency decr eased as the influent loading increased. More than 90% and 80% DMAC removal efficiencies are achieved for influent loadings below 20.2 and 34.5 g DMAC /m(3)/h, respectively. The TBAB appears to be an effective treatment proces s for controlling DMAC emission with low-to-medium loadings and the effecti veness could be maintained over a long-period operation. (C) 2001 Elsevier Science Ltd. All rights reserved.