Ultra-Violet Light/Ozone Treatment of a Sequentially Loaded and Regenerated Granular Activated Carbon Biofilter

摘要

The research described herein has evaluated a UV/ozone in-situ regeneration treatment of sequentially loaded and regenerated GAC biofilters used for removing methyl isobutyl ketone (MIBK) from waste-air streams. Exploration has been conducted in the three primary areas of: (a) GAC biofiltration including ultra-violet light (UV)/ozone treatment of sequentially loaded and regenerated GAC biofilters, (b) biofilter biofilm kinetics, and (c) UV/ozone treatment of virgin and loaded GAC. The GAC biofilter was alternately exposed to a simulated waste air stream laden with MIBK for 24 hours, followed by exposure to a regeneration air stream for 24 hours. The second bed was regenerated with either humid air or humid air which had passed through the UV reactor to produce ozone and associated oxidants. Sequentially loaded and regenerated bench-scale reactors have been constructed to operate in a manner analogous to a commercially available air pollution control system manufactured by Terr-aqua Environmental Systems (TAES).