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J Air Waste Manag Assoc

Title:		Biofiltration of a mixture of volatile organic emissions
Author(s):		Aizpuru A; Malhautier L; Roux JC; Fanlo JL;
Address:		"Ecole des Mines d'Ales, Laboratoire Genie de l'Environnement Industriel, France"
Journal Title:		J Air Waste Manag Assoc
Year:		2001
Volume:		51
Issue:		12
Page Number:		1662 - 1670
DOI:		10.1080/10473289.2001.10464388
ISSN/ISBN:		1096-2247 (Print) 1096-2247 (Linking)
Abstract:		"Air biofiltration is now under active consideration for the removal of the volatile organic compounds (VOCs) from polluted airstreams. To optimize this emerging environmental technology and to understand compound removal mechanisms, a biofilter packed with peat was developed to treat a complex mixture of VOCs: oxygenated, aromatic, and chlorinated compounds. The removal efficiency of this process was high. The maximum elimination capacity (ECmax) obtained was approximately 120 g VOCs/m3 peat/hr. Referring to each of the mixture's components, the ECmax showed the limits in terms of biodegradability of VOCs, especially for the halogenated compounds and xylene. A stratification of biodegradation was observed in the reactor. The oxygenated compounds were metabolized before the aromatic and halogenated ones. Two assumptions are suggested. There was a competition between bacterial communities. Different communities colonized the peat-based biofilter, one specialized for the elimination of oxygenated compounds, the others more specialized for elimination of aromatic and halogenated compounds. There was also substrate competition. Bacterial communities were the same over the height of the column, but the more easily biodegradable compounds were used first for the microorganism metabolism when they were present in the gaseous effluent"
Keywords:		"Air Pollutants/*isolation & purification/*metabolism Air Pollution/*prevention & control Bacteria Biodegradation, Environmental Filtration Organic Chemicals/isolation & purification/metabolism Volatilization;"
Notes:		"MedlineAizpuru, A Malhautier, L Roux, J C Fanlo, J L eng Research Support, Non-U.S. Gov't 2005/01/26 J Air Waste Manag Assoc. 2001 Dec; 51(12):1662-70. doi: 10.1080/10473289.2001.10464388"