« Previous AbstractNew synthesis: the chemistry of partner choice in insect-microbe mutualisms    Next Abstract"Detection of very long-chain hydrocarbons by laser mass spectrometry reveals novel species-, sex-, and age-dependent differences in the cuticular profiles of three Nasonia species" »

Biodegradation

Title:		Biodegradation of aromatic compounds and TCE by a filamentous bacteria-dominated consortium
Author(s):		Bielefeldt AR; Stensel HD;
Address:		"Department of Civil, Environmental, & Architectural Engineering, University of Colorado, Boulder 80309, USA"
Journal Title:		Biodegradation
Year:		1999
Volume:		10
Issue:		1
Page Number:		1 - 13
DOI:		10.1023/a:1008327006308
ISSN/ISBN:		0923-9820 (Print) 0923-9820 (Linking)
Abstract:		"The Michaelis-Menten biodegradation kinetics (k and Ks) of aromatic compounds and trichloroethene (TCE) by an aerobic enrichment culture grown on phenol and dominated by a unique filamentous bacterium were measured. The average k and Ks values for phenol, benzene (B), toluene (T), ethylbenzene (E), o-xylene (oX), p-xylene (pX), naphthalene and TCE in g per g VSS-d and mg L-1 were 5.72 and 0.34, 1.20 and 0.51, 2.09 and 0.47, 0.77 and 0.23, 0.61 and 0.16, 0.73 and 0.23, 0.17 and 0.18, and 0.16 and 0.18, respectively. Significant variability in these measured kinetics was noted between tests conducted over the 5-month period during which the fed-batch culture with a 5-day solids retention time was maintained; the coefficient of variation of the k and Ks values ranged from 11-43% and 4-50%, respectively. This variation was significantly greater than the method measurement error on a given date. Degradation of BTEoXpX mixtures could be described by a basic competitive inhibition model. Batch tests during which the culture was fed individual BTEX compounds showed the culture grew poorly on the xylenes and had poor subsequent xylene degradation rates. This work indicates the potential to simultaneously treat a mixture of volatile organic compounds using this consortium, and the ability to predict the mixture biodegradation rates on the basis of the individual compound biodegradation kinetics"
Keywords:		"Algorithms Bacteria/*metabolism/ultrastructure Benzene/metabolism Benzene Derivatives/metabolism Biodegradation, Environmental Hydrocarbons, Aromatic/analysis/*metabolism Kinetics Naphthalenes/metabolism Phenols/metabolism Solvents/analysis/*metabolism To;"
Notes:		"MedlineBielefeldt, A R Stensel, H D eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Netherlands 1999/07/29 Biodegradation. 1999 Feb; 10(1):1-13. doi: 10.1023/a:1008327006308"