DEVELOPMENT AND EVALUATION OF ROTATING DRUM BIOFILTER FOR VOC REMOVAL
Abstract:An innovative rotating drum biofilter (RDB) was developed to overcome the shortcomings of existing biofilters. Four layers of foam media are concentrically mounted in a cylindrical drum to support biofilms. The RDB was evaluated at different air empty bed contact times (EBCTs), VOC loadings and influent contaminant concentrations using diethyl ether as model VOC. Ether removal efficiencies decreased with the increases of the EBCT, ether loading and influent concentration. At 2.0 kg COD m−3 day−1 VOC loading, ether removal efficiency decreased from over 99 % to 82 % when the EBCT decreased from 60 to 5.0 seconds. At 30 second EBCT, ether removal efficiency decreased from over 99 % to 40 % when the organic loadings increased from 2.0 to 16.0 kg COD m−3 day−1. The RDB maintained stable performance over extended service periods. This investigation demonstrates that the RDB is a competitive biofilter for VOC emission control.
Document Type: Research Article
Publication date: January 1, 2002
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