« Previous AbstractGene expression profiles in testis of pigs with extreme high and low levels of androstenone    Next Abstract"Host selection behavior of bark beetles (Coleoptera: Scolytidae) attackingPinus ponderosa, with special emphasis on the western pine beetle,Dendroctonus brevicomis" »

J Air Waste Manag Assoc

Title:		"Biofilter treatment of volatile organic compound emissions from reformulated paint: complex mixtures, intermittent operation, and startup"
Author(s):		Moe WM; Qi B;
Address:		"Department of Civil and Environmental Engineering, Louisiana State University, Baton Rouge, LA 70803, USA. moemwil@lsu.edu"
Journal Title:		J Air Waste Manag Assoc
Year:		2005
Volume:		55
Issue:		7
Page Number:		950 - 960
DOI:		10.1080/10473289.2005.10464687
ISSN/ISBN:		1096-2247 (Print) 1096-2247 (Linking)
Abstract:		"Two biofilters were operated to treat a waste gas stream intended to simulate off-gases generated during the manufacture of reformulated paint. The model waste gas stream consisted of a five-component solvent mixture containing acetone (450 ppm(v)), methyl ethyl ketone (12 ppm(v)), toluene (29 ppm(v)), ethylbenzene (10 ppm(v)), and p-xylene (10 ppm(v)). The two biofilters, identical in construction and packed with a polyurethane foam support medium, were inoculated with an enrichment culture derived from compost and then subjected to different loading conditions during the startup phase of operation. One biofilter was subjected to intermittent loading conditions with contaminants supplied only 8 hr/day to simulate loading conditions expected at facilities where manufacturing operations are discontinuous. The other biofilter was subjected to continuous contaminant loading during the initial start period, and then was switched to intermittent loading conditions. Experimental results demonstrate that both startup strategies can ultimately achieve high contaminant removal efficiency (>99%) at a target contaminant mass loading rate of 80.3 g m(-3) hr(-1) and an empty bed residence time of 59 sec. The biofilter subjected to intermittent loading conditions at startup, however, took considerably longer to reach high performance. In both biofilters, ketone components (acetone and methyl ethyl ketone) were, more rapidly degraded than aromatic hydrocarbons (toluene, ethylbenzene, and p-xylene). Scanning electron microscopy and plate count data revealed that fungi, as well as bacteria, populated the biofilters"
Keywords:		"Air Pollution/*prevention & control Biodegradation, Environmental Filtration Organic Chemicals/analysis/isolation & purification *Paint Volatilization;"
Notes:		"MedlineMoe, William M Qi, Bing eng Research Support, Non-U.S. Gov't 2005/08/23 J Air Waste Manag Assoc. 2005 Jul; 55(7):950-60. doi: 10.1080/10473289.2005.10464687"