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J Air Waste Manag Assoc


Title:Effect of advanced oxidants generated via ultraviolet light on a sequentially loaded and regenerated granular activated carbon biofilter
Author(s):Dusenbury JS; Cannon FS;
Address:"U.S. Army TACOM-TARDEC, Warren, Michigan, USA"
Journal Title:J Air Waste Manag Assoc
Year:2004
Volume:54
Issue:7
Page Number:871 - 889
DOI: 10.1080/10473289.2004.10470947
ISSN/ISBN:1096-2247 (Print) 1096-2247 (Linking)
Abstract:"The objective of this research was to investigate a sequentially loaded and regenerated granular activated carbon (GAC) biofilter system and to determine whether regenerative ozonation/advanced oxidation could improve the removal and biodegradation of a volatile organic compound from a contaminated airstream. Bench-scale reactors were constructed to operate in a manner analogous to a commercially available system manufactured by Terr-Aqua Environmental Systems (only with longer contact time). The GAC system consisted of two GAC biofilter beds that operated in a cyclical manner. On a given day, the first GAC bed adsorbed methyl isobutyl ketone from a simulated waste airstream, while the second bed underwent regeneration; then on the next day, the second bed was in the adsorption mode while the first was regenerated. Three bench-scale systems were used to compare the performance under three operating conditions: (1) ozone/ associated oxidant regeneration of a GAC biofilter system that was seeded with microorganisms from a field site, (2) a humid air regeneration of a seeded GAC biofilter, and (3) a humid air regeneration of an unseeded GAC biofilter. For the advanced oxidant regenerated GAC biofilter, a maximum removal efficiency of >95% was achieved with an empty bed contact time of 148 sec and an influent concentration of 125 ppm methyl isobutyl ketone, and 90-95% was achieved at 148-sec empty bed contact time and a 1150-ppm influent"
Keywords:"Air Pollutants/*isolation & purification/metabolism Air Pollution/*prevention & control Biodegradation, Environmental *Bioreactors Carbon/*chemistry Filtration Organic Chemicals/isolation & purification/metabolism Oxidation-Reduction Ultraviolet Rays Vola;"
Notes:"MedlineDusenbury, James S Cannon, Fred S eng Research Support, Non-U.S. Gov't 2004/08/12 J Air Waste Manag Assoc. 2004 Jul; 54(7):871-89. doi: 10.1080/10473289.2004.10470947"

 
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